Description:FIELD OF THE INVENTION

[0001] The present invention relates to a harvest cleaning and sorting system that is capable of automating the entire post-harvest process, accurately identify and separating spoiled or defective harvest from healthy produce to ensure quality control, thereby increasing operational efficiency.

BACKGROUND OF THE INVENTION

[0002] In the agriculture and food processing industry, handling of harvested produce plays an important role in ensuring product quality, safety, and shelf life. After harvesting, most produce requires cleaning, sorting, and grading before it can be packed or transported. During this stage, it is also important to identify and separate spoiled or damaged items to maintain the overall quality of the batch. Additionally, value-added steps like drying and applying protective coatings are often needed to preserve freshness and appearance during storage and transport. Efficient management of these steps is critical for reducing waste, improving productivity, and meeting market and export standards.

[0003] Traditionally, post-harvest processing has been done either manually or using basic machines for individual operations like washing, drying, or grading. In manual setups, workers visually inspect and clean the produce, separate spoiled or poor-quality items, and sort them based on size or appearance. However, manual methods are slow, labour-intensive, and prone to errors due to fatigue or inconsistency in human judgment. Mechanical device used in the past often perform only one function at a time, such as using simple rollers for cleaning or vibration trays for grading.

[0004] Existing machines and methods also have limitations when it comes to identifying internal spoilage or subtle defects. Most systems rely on external appearance, which may not be enough to detect internal damage, ripeness level, or hidden contamination. Moreover, traditional drying and coating processes are not responsive to the condition of individual produce items, which can lead to under or over-processing. In addition, sorting methods based solely on size or color do not offer the level of precision needed for quality-based grading.

[0005] GB2570442A discloses process line for washing and sorting harvested vegetables such as green beans B comprises in sequence a washing station for washing the vegetables, a drying station for drying the vegetables, a sorting station for removing small vegetables and vegetable pieces and passing sizeable vegetables, and an inspection station downstream of the other stations for optically inspecting sizeable vegetables including means for removing individual vegetables not complying with inspection standards. The line may include an infeed elevator at the washing station end, a blowing station for blowing leaves from the vegetables, a manual inspection station downstream of the inspection station, and a bagging and weighing station. The washing station may comprise first stage and second stage washing stations. The drying station may comprise fans and/or an air-knives for blowing moisture from the vegetables. The sorting station may comprise a vibrational sorter having gaps sized to allow small vegetables and pieces to fall through. The optical inspection station may comprise cameras for optically detecting defects and air nozzles for removing defective vegetables.

[0006] CN102166035A discloses cleaning and sorting machine for fruits and vegetables, which comprises a raw material bin, a water spray device, a sorting and screening net, a transition bin and a material receiving bin, wherein the water spray pipe is connected to the lower part of the raw material bin, and the sorting and screening net is arranged on the upper part of the raw material bin; the transition bin is arranged on the upper part of the sorting and screening net; and the material receiving bin is arranged aside the transition bin. A water tank and a water pump are also arranged on the lower part of the cleaning and sorting machine; a water pumping pipe of the water pump is arranged in the water tank; a water outlet of the water pumping pipe is connected with the water spray pipe; a charging groove is also formed on the upper part of the raw material bin; and a water filter hole is also formed at the bottom of the material receiving bin. The cleaning and sorting machine has the advantages that a structure is simple, the cleaning and sorting functions can be integrated automatically, the fruits and the vegetables are not damaged due to the buoyancy of water in the cleaning and sorting process, the operation is easy, the water can be recycled, and resources are saved.

[0007] Conventionally, many systems exist for cleaning, sorting, and processing agricultural produce after harvest. However, the cited arts have certain limitations pertaining to integration, automation, and precision. Existing systems either handle only basic cleaning and sorting functions or depend heavily on manual inspection for detecting spoilage and grading. They often lack the ability to detect internal defects, do not provide advanced sorting based on multiple quality parameters, and are limited in their ability to apply preservation treatments such as waxing or labeling in a single workflow.

[0008] In order to overcome the aforementioned drawbacks, there exists a need in the art to develop a system that is capable of performing multiple post-harvest operations such as spoilage detection, cleaning, drying, coating, grading, sorting, and labelling to enable automatic handling of harvested produce from the point of receiving to the point of final collection, with minimal manual intervention.

OBJECTS OF THE INVENTION

[0009] The principal object of the present invention is to overcome the disadvantages of the prior art.

[0010] An object of the present invention is to develop a system that is capable of automatically detecting and separating spoiled or damaged harvest to ensure that only fresh and usable produce proceeds for further handling and processing.

[0011] Another object of the present invention is to develop a system that is capable of cleaning and drying the harvested produce in a continuous and efficient manner to reduce manual intervention, improve hygiene, and prepare the produce for the next stage.

[0012] Another object of the present invention is to develop a system that is capable of grading the harvest based on quality, size, or appearance through an automated process to ensure uniform classification and reduce reliance on human judgment.

[0013] Yet another object of the present invention is to develop a system that is capable of sorting the harvest based on the determined grade and applying labels automatically to support easy identification, improve traceability, and enhance post-harvest operations.

[0014] The foregoing and other objects, features, and advantages of the present invention will become readily apparent upon further review of the following detailed description of the preferred embodiment as illustrated in the accompanying drawings.

SUMMARY OF THE INVENTION

[0015] The present invention relates to a harvest cleaning and sorting system that is capable of uniformly drying and preserving harvested produce to extend shelf life and maintain freshness and classify harvested produce into different grades based on quality and size to meet market standards, thus preventing spoilage and extending shelf life for storage and transportation.

[0016] According to an aspect of the present invention, a harvest cleaning and sorting system comprising of a platform provided with an inclined panel to receive harvest, a bucket attached with the platform by means of an eight bar linkage to hold harvest and position onto the panel, a transfer arrangement integrated in the panel to move the harvest forward, an extendable barrier provided along each lateral portion of the panel to prevent falling of the harvest from the panel, a sensing unit installed on the platform to detect spoiled harvest carried on the panel, a detection module configured with a control unit to receive data from the sensing unit to determine spoiled harvest, an articulated telescopic gripper installed over the platform to pick harvest determined to be spoiled to place into a recess provided on the platform, a cleaning arrangement provided on the platform to clean harvest received from the panel.

[0017] According to another aspect of the present invention, the system further includes a drying arrangement installed on the platform to dry cleaned harvest, a wax application arrangement mounted on the platform to apply a coating of wax on the harvest for preservation, an imaging unit mounted on the platform to capture images of the waxed harvest and feed into a sorting module configured with the control unit to determine grade of the harvest based on quality and dimensions, a plurality of iris holes formed on the flap to drop the harvest as per determined grade into one or more boxes mounted underneath the platform by means of sliding units and a label applicator installed with the box to apply a grading label onto the harvest.

[0018] While the invention has been described and shown with particular reference to the preferred embodiment, it will be apparent that variations might be possible that would fall within the scope of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

[0019] These and other features, aspects, and advantages of the present invention will become better understood with regard to the following description, appended claims, and accompanying drawings where:
Figure 1 illustrates an isometric view of a harvest cleaning and sorting system is illustrated.

DETAILED DESCRIPTION OF THE INVENTION

[0020] The following description includes the preferred best mode of one embodiment of the present invention. It will be clear from this description of the invention that the invention is not limited to these illustrated embodiments but that the invention also includes a variety of modifications and embodiments thereto. Therefore, the present description should be seen as illustrative and not limiting. While the invention is susceptible to various modifications and alternative constructions, it should be understood, that there is no intention to limit the invention to the specific form disclosed, but, on the contrary, the invention is to cover all modifications, alternative constructions, and equivalents falling within the spirit and scope of the invention as defined in the claims.

[0021] In any embodiment described herein, the open-ended terms "comprising," "comprises,” and the like (which are synonymous with "including," "having” and "characterized by") may be replaced by the respective partially closed phrases "consisting essentially of," consists essentially of," and the like or the respective closed phrases "consisting of," "consists of, the like.

[0022] As used herein, the singular forms “a,” “an,” and “the” designate both the singular and the plural, unless expressly stated to designate the singular only.

[0023] The present invention relates to a harvest cleaning and sorting system that is capable of enabling accurate detection and removal of spoiled, damaged, or defective harvest, ensuring that only high-quality produce continues through the processing line, thus allowing consistent compliance with market standards and improving product value.

[0024] Referring to Figure 1, an isometric view of a harvest cleaning and sorting system is illustrated, comprising of a platform 101 provided with an inclined panel 102, a bucket 103 attached with the platform 101 by means of an eight bar linkage 104, a transfer arrangement 105 integrated in the panel 102 comprises sectioned member 105a provided in slot cut in the panel 102, at least one rotating cam 105b connected with the member 105a, an extendable barrier 106 provided along each lateral portion comprises a plate 106a attached laterally with the panel 102 by means of a pneumatic pusher 106b, an articulated telescopic gripper 107 installed over the platform 101, a cleaning arrangement 108 provided on the platform 101, comprises a series of motorised rollers 108a attached parallel over the platform 101 with bristles, a plurality of water sprinklers 108b disposed over the platform 101 and connected with a water tank 108c integrated with the platform 101.

[0025] Figure one further includes a drying arrangement 109 installed on the platform 101 comprises flap 109a , a dual axis lead screw arrangement 109b, a hot air blower 109c mounted with the lead screw arrangement 109b, a plurality of iris holes 110 formed on the flap 109a, a label applicator 111 installed with the box comprises printer 111a, a robotic arm 111b installed in the box via a spout 111c, a robotic limb 111d having a suction cup 111e, a wax application arrangement 112 mounted on the platform 101 comprises a plurality of nozzles 112a attached over the platform 101, connected with a wax compartment 112b, an imaging unit 113 mounted on the platform 101, one or more boxes 114 mounted underneath the platform 101 by means of sliding units 115.

[0026] The system comprises of the platform 101 provided with inclined panel 102 configured to receive the harvest. The inclined panel 102 facilitates movement of the harvest under gravity and is designed as the primary surface where further operations are performed.

[0027] The bucket 103 is attached to the platform 101 by means of eight- bar linkage 104 to hold and position the harvest onto the inclined panel 102. The eight- bar linkage 104 ensures smooth movement and controlled placement of the harvested produce onto the panel 102, thereby avoiding damage to the produce during transfer.

[0028] The eight- bar linkage 104 mentioned herein works as a complex kinematic chain consisting of eight interconnected links and multiple revolute joints that create a constrained motion path. The input link receives power from a motor or actuator, which transmits motion through interconnected couplers to achieve precise movement at the output link. Compared to simpler four- or six- bar linkage 104, the eight-bar configuration provides greater flexibility in trajectory control, allowing non-linear and controlled displacement. In harvesting apples, the eight- bar linkage 104 allows the bucket 103 to smoothly lift, tilt, and position produce onto the inclined panel 102 while maintaining stability and minimizing mechanical shocks or spillage.

[0029] The transfer arrangement 105 is integrated into the inclined panel 102 to move the harvest forward. The transfer arrangement 105 comprises the sectioned member 105a provided in a slot cut into the panel 102, and at least one rotating cam 105b connected with the sectioned member 105a and the panel 102. The rotating cam 105b reciprocates the sectioned member 105a, enabling the harvest to be gradually moved forward on the panel 102 for further processing.

[0030] The sectioned member 105a is a segmented mechanical element positioned within a longitudinal slot cut into the inclined panel 102. The member 105a functions as the primary conveyor surface for harvested produce. When actuated, individual sections of the member 105a rise sequentially, creating a lifting motion that nudges the harvest forward. The segmented design prevents sudden jerks and distributes the force uniformly, thereby avoiding damage to delicate produce. The controlled vertical displacement of the sections allows the harvest to incrementally shift toward the processing zone. The sectioned member 105a thus acts as an intermittent conveyor, synchronizing with the rotating cam 105b to ensure smooth and steady advancement.

[0031] The rotating cam 105b is a mechanical driver connected to the sectioned member 105a and fixed to the panel 102. The rotating cam 105b is powered by a motor to execute continuous rotary motion, which is converted into linear reciprocating movement of the sectioned member 105a. The cam 105b profile is designed to lift and lower the sectioned member 105a in a timed sequence, ensuring gradual movement of the harvest forward. The dwell phase of the cam 105b holds the section stable, allowing produce to settle before the next push. By precisely controlling stroke length and timing, the rotating cam 105b ensures synchronized, vibration-free, and damage-minimizing transfer of harvested produce.

[0032] The extendable barrier 106 is provided along each lateral portion of the inclined panel 102 to prevent falling of the harvest from the panel 102. The barrier 106 comprises the plate 106a attached laterally with the panel 102 by means of the pneumatic pusher 106b, allowing it to extend and retract as required during the transfer process.

[0033] The extendable barrier 106 mentioned herein is powered by a pneumatic unit that embodies an air compressor, air cylinder, air valves, and piston which work in collaboration to perform the extension and retraction of the barrier 106. The barrier 106 comprises a nested tube arrangement that contains multiple hollow tubes connected concentrically. The air cylinder is attached to the bottom of the nested tube arrangement and further consists of an air piston attached to the topmost part of the nested tube arrangement from the inside. The air cylinder is integrated with one inlet and one outlet valve that is connected to an air compressor.

[0034] The air compressor draws air from the surroundings and compresses it to form pressurized air which enters the inlet valve and creates a force that pushes the piston in the forward direction. As the piston moves in the forward direction, it leads to the sequential opening of the concentrically connected tubes from the top toward the bottom. This leads to the extension of the barrier 106 to prevent falling of the harvest from the panel 102. The pneumatic pusher 106b mentioned herein works by pneumatic unit that works same as mentioned above allowing it to extend and retract as required during the transfer process.

[0035] A sensing unit is installed on the platform 101 to detect spoiled harvest carried on the inclined panel 102. The sensing unit comprises a hyperspectral camera for capturing hyperspectral images of the harvest, an NIR (near-infrared) sensor to detect near-infrared emissions from the harvest, a colorimetric sensor to capture the colour of the harvest, and an odour sensor to detect odour emitted by the harvest.

[0036] The hyperspectral camera functions by capturing images across numerous narrow spectral bands beyond the visible spectrum. Each pixel in the image contains a complete spectral signature, allowing precise identification of the chemical and physical properties of the harvest. By analyzing spectral reflectance patterns, the system can detect internal defects, ripeness, and early signs of spoilage not visible to the human eye. The hyperspectral data is transmitted to the control unit for processing and classification. This technology enables non-destructive, real-time quality assessment of the harvest with high accuracy, ensuring only healthy produce continues through the cleaning and sorting process.

[0037] For an example, the hyperspectral camera analyzing harvested apples capture reflectance data in the near-infrared range to detect bruises beneath the skin that are invisible to the naked eye. The spectral signature of bruised tissue differs from healthy tissue due to changes in moisture and cellular structure. By processing this data, the control unit automatically identifies defective apples, ensuring only unspoiled fruits move ahead for cleaning, waxing, grading, and market packaging.

[0038] The NIR sensor operates by emitting near-infrared light onto the harvest surface and measuring the reflected or absorbed wavelengths. Since organic materials have unique absorption characteristics in the NIR region, the sensor can detect internal moisture content, sugar levels, and structural integrity. Variations in the reflected NIR signal are analyzed to determine freshness or presence of spoilage. The sensor provides rapid, non-invasive readings, complementing hyperspectral imaging by focusing on internal chemical composition rather than external appearance. Integrated with the control unit, the NIR sensor enhances accuracy in spoilage detection, particularly for defects that are not visible to the naked eye.

[0039] For an example, when testing harvested apples, an NIR sensor emit near-infrared light and measure the reflected wavelengths to estimate sugar concentration, known as Brix value. Apples with lower than expected sugar levels or abnormal absorption patterns may indicate immaturity or onset of spoilage. This information is processed by the control unit to separate under-ripe or spoiled grapes from healthy ones, ensuring only quality produce moves forward for cleaning and packaging.

[0040] The colorimetric sensor measures the visible color spectrum of the harvest surface using photodiodes or filters to quantify red, green, and blue intensity values. By comparing captured values against calibrated color profiles, the sensor detects variations associated with ripeness, bruising, or surface spoilage. The sensor provides rapid feedback to identify produce with discoloration or abnormal surface appearance. This sensor works in real-time as harvest passes along the inclined panel 102, feeding continuous data into the control unit. Its simplicity and speed make it effective for distinguishing acceptable produce from visually degraded harvest, complementing other sensors for comprehensive quality assessment.

[0041] For an example, in apple sorting, the colorimetric sensor captures RGB intensity values from each fruit’s surface and compares them with calibrated ripeness profiles. The apple showing higher green intensity indicates immaturity, while excessive dark or brown tones suggest bruising or spoilage. The sensor rapidly flags such deviations, and the control unit directs the defective tomatoes to rejection bins. This enables real-time grading based on color, ensuring only market-ready tomatoes proceed further.

[0042] The odor sensor functions as an electronic nose using an array of gas-sensitive elements to detect volatile organic compounds (VOCs) emitted from the harvest. As spoilage progresses, specific VOCs such as ethanol, aldehydes, or sulfur compounds are released, which the sensor identifies through measurable changes in electrical resistance or frequency. The detected odor profile is compared with stored reference data to confirm spoilage. The sensor provides critical input for early-stage detection when visual or spectral cues are insufficient. These sensors work collectively to provide comprehensive data regarding the quality and condition of the harvest.

[0043] For an example, during storage of apples, the odor sensor detect elevated levels of ethanol and aldehydes released as the fruit begins fermenting due to microbial spoilage. The gas-sensitive elements register these VOCs as resistance changes, which are processed against reference profiles stored in the control unit. Even before visible mold or discoloration appears, the sensor identifies the strawberries as spoiled, ensuring early removal and preventing contamination of healthy produce.

[0044] A detection module is configured with a control unit to receive data from the sensing unit and to determine spoiled harvest based on the detected parameters. The control unit processes multisensory data and identifies defective or spoiled produce for removal.

[0045] In an embodiment of the present invention, the control unit activates an inbuilt communication module for establishing a wireless connection between the microcontroller and a computing unit that is inbuilt with a user-interface and accessed by the user for enabling the user to determine spoiled harvest based on the detected parameters. The user interacts with the interface through a touch screen, keyboard, or other input methods available on the computing unit. The computing unit mentioned herein includes, but not limited to smartphone, laptop, tablet.

[0046] The communication module mentioned herein includes, but not limited to Wi-Fi (Wireless Fidelity) module, Bluetooth module, GSM (Global System for Mobile Communication) module. The communication module used in the device is preferably the Wi-Fi module. The Wi-Fi module enables wireless communication by transmitting and receiving data over radio frequencies using IEEE 802.11 protocols. It connects to a network via an access point, converting digital data into radio signals. The module processes TCP/IP protocols for data
exchange, interfaces with microcontrollers through UART/SPI, and ensures
encrypted communication using WPA/WPA2 security standards for secure and
efficient wireless connectivity.

[0047] The articulated telescopic gripper 107 is installed over the platform 101 to pick harvest determined to be spoiled. The gripper 107 is capable of precise movements and places the spoiled harvest into a recess provided on the platform 101. This ensures that only fresh and healthy produce proceeds further for cleaning and preservation. The articulated telescopic gripper 107 mentioned herein operates through a combination of pneumatic unit that works same as discussed above and multi-joint articulation to achieve precise reach and positioning. The pneumatic unit extends or retracts linearly, allowing the gripper 107 to adjust its length for accessing produce at varying distances. The articulated joints provide rotational and angular movements, enabling the gripper 107 to orient itself around irregularly placed harvest. End-effectors, such as soft adaptive fingers gently grasp the spoiled produce without causing damage. Controlled by actuators and coordinated via the control unit, the gripper 107 accurately lifts the targeted harvest and deposits it into the designated recess for removal.

[0048] The cleaning arrangement 108 is provided on the platform 101 to clean the harvest received from the inclined panel 102. The cleaning arrangement 108 comprises a series of motorized rollers 108a attached in parallel over the platform 101, each roller being provided with bristles to scrub the harvest. The motorized rollers 108a are arranged in parallel over the platform 101 and rotate at controlled speeds to generate continuous scrubbing action on the harvest surface. Each roller is fitted with soft, durable bristles that contact the produce without causing surface damage. The rotation direction is synchronized to roll the harvest forward while simultaneously dislodging soil, dust, and contaminants. The bristles penetrate surface crevices, ensuring thorough cleaning of irregularly shaped produce. The rollers 108a are powered by electric motors with adjustable torque, allowing speed variation according to the apples sensitivity. This arrangement ensures consistent, automated cleaning while maintaining structural integrity of delicate harvest items.

[0049] The plurality of water sprinklers 108b are disposed over the platform 101 and connected to the water tank 108c integrated with the platform 101 to spray water onto the harvest during scrubbing. The water sprinklers 108b are strategically positioned above the roller arrangement to deliver a uniform spray of water during scrubbing. The spray nozzles 112a are designed to atomize water into fine droplets, improving contact and cleaning efficiency while minimizing wastage. Flow control valves regulate water pressure and spray volume in coordination with the control unit, adapting to different harvest types. The sprinkling process loosens soil, dissolves residues, and washes away contaminants dislodged by the rollers 108a, resulting in hygienic and thorough cleaning of the harvest.

[0050] The mesh is provided underneath the rollers 108a to collect waste water in a cavity formed within the platform 101, ensuring hygienic cleaning and efficient disposal of waste water. The mesh mentioned herein allow passage of wastewater, dirt, and debris generated during scrubbing. The mesh has optimized pore size to ensure effective drainage while preventing loss of smaller harvest items. Collected wastewater passes through the mesh into cavity. The mesh also prevents clogging of the rollers 108a by continuously filtering waste away from the cleaning surface. The wastewater cavity may be connected to a discharge outlet ensuring eco-friendly operation.

[0051] The drying arrangement 109 is installed on the platform 101 to dry the cleaned harvest. The drying arrangement 109 comprises a flap 109a configured with a vibration unit and mounted on the platform 101 to receive the harvest. The vibration unit agitates the flap 109a to remove surface water from the harvest. The vibration unit mentioned herein works by converting rotational or linear mechanical energy from an actuator into controlled oscillatory motion of the flap 109a. Typically driven by an eccentric motor, the unit generates high-frequency vibrations that propagate through the flap 109a surface. These vibrations dislodge water droplets from the harvest by creating alternating acceleration and micro-lifting effects, enhancing water separation without damaging the produce. Amplitude and frequency are adjustable to suit different crop types and moisture levels.

[0052] The dual-axis lead screw arrangement 109b is mounted on the platform 101 perpendicularly with respect to the flap 109a to direct hot air onto the harvest via the hot air blower 109c mounted on the lead screw arrangement 109b. The dual-axis lead screw arrangement 109b consists of two perpendicular lead screws mounted on the platform 101, allowing precise bidirectional movement of the hot air blower 109c. By rotating the lead screws via stepper motors, the blower 109c can be positioned along both horizontal and vertical axes to target harvested produce uniformly. The coordinated movement ensures all surfaces of the produce receive consistent airflow. This enables controlled drying with adjustable speed, position, and temperature, enhancing efficiency while minimizing thermal stress or damage to delicate harvest items.

[0053] The hot air blower 109c mentioned herein operates by drawing ambient air through a heating element and expelling it at controlled temperature and velocity onto the harvested produce. A fan or impeller generates a consistent airflow, while the heating element raises the air to a set temperature suitable for the specific crop. Hot air accelerates evaporation of residual moisture after cleaning, preventing spoilage and preparing the produce for waxing or packaging. Temperature, flow rate, and direction are regulated via the control unit for optimal drying efficiency.

[0054] The vibration unit comprises a quick-return arrangement connecting the flap 109a with the platform 101 for effective and rapid vibration. The quick-return vibration unit converts rotary or linear input into high-frequency reciprocating motion of the flap 109a, with a rapid return stroke to maximize vibration cycles. Typically employing an eccentric cam, the flap 109a is lifted and dropped repeatedly, shaking off surface water from the harvest. The quick-return design reduces downtime between strokes, improving drying efficiency. Vibration amplitude and frequency are adjustable based on crop type and moisture content. The unit is integrated with the control unit to synchronize flap 109a motion with harvest flow, ensuring uniform surface drying while maintaining produce integrity.

[0055] Additionally, a plurality of moisture sensors is integrated on the flap 109a to detect moisture on the surface of the harvest. The moisture mentioned herein is preferably an infrared (NIR) moisture sensor works by emitting near-infrared light towards the harvest. As the NIR light penetrates the material, it interacts with water molecules, which absorb and reflect the light differently compared to dry material. The sensor detects the reflected NIR light and measures variations in intensity and wavelength caused by the presence of moisture. These measurements are processed to determine the moisture content of the harvest. These sensors regulate the drying arrangement 109 in coordination with the control unit to ensure optimum drying without overexposing the harvest to hot air.

[0056] The wax application arrangement 112 is mounted on the platform 101 to apply a coating of wax on the dried harvest for preservation. The wax application arrangement 112 comprises the plurality of nozzles 112a attached over the platform 101 and connected with the wax compartment 112b provided on the platform 101.

[0057] The plurality of wax nozzles 112a mentioned herein is designed to atomize and evenly spray molten wax onto the dried harvest. Each nozzle controls the flow rate and spray pattern to ensure uniform coating without over-saturating or dripping. The nozzles 112a oriented at adjustable angles to cover all surfaces of irregularly shaped produce. By delivering fine droplets, the nozzles 112a forms a thin protective layer that reduces moisture loss, prevents microbial contamination, and enhances shelf life. The nozzles 112a operate in coordination with the control unit, which regulates pressure, and spray duration to match the type and size of the harvest. The nozzles 112a spray wax uniformly over the harvest, thereby extending shelf life and enhancing the appearance of the produce.

[0058] The imaging unit 113 is mounted on the platform 101 to capture images of the waxed harvest. The imaging unit 113 incorporates a processor that is encrypted with an artificial intelligence protocol. The artificial intelligence protocol operates by following a set of predefined instructions to process data and perform tasks autonomously. Initially, data is collected and input into a database, which then employs protocol to analyze and interpret the captured images. The processor of the imaging unit 113 via the artificial intelligence protocol processes the captured images and sent the signal to the microcontroller for detecting waxed harvest.

[0059] The imaging unit 113 feeds image data into a sorting module configured with the control unit to determine the grade of the harvest based on quality and dimensions. The sorting module classifies the produce into multiple grades to match market standards. The sorting module mentioned herein receives image data from the imaging unit 113 and processes it using advanced image analysis protocol. The module evaluates parameters such as size, shape, color uniformity, surface defects, and other quality indicators of the harvest. The module compares these parameters against predefined grading criteria stored in the control unit to classify each produce into appropriate grades. Real-time processing ensures that grading decisions are immediate and precise.

[0060] The plurality of iris holes 110 are formed on a flap 109a provided at the sorting zone of the platform 101. These iris holes 110 are configured to drop the harvest as per determined grade into one or more boxes 114 mounted underneath the platform 101. The iris holes 110 is an adjusting circular aperture comprised of an actuation ring and a plurality of blades according to the size of the lid. The blades are engraved with the protrusions through which the actuation ring is affixed to each blade. The actuation ring is connected to a motor, which helps in the movement of the actuation ring leading to the movement of blades inward or outward to change the size of the opening. When the blades close, the aperture becomes smaller, closing the lid. When the blades open, the aperture widens, opening the holes 110. This adjustment allows the iris holes 110 to control to drop the harvest as per determined grade.

[0061] The boxes 114 are attached by means of sliding units 115 for easy movement and collection of sorted produce. The sliding units 115 mentioned herein comprises of a rail unit that provides a guided path for linear movement. The rail unit usually includes a pair of parallel rails or tracks, along which the sliding unit moves. The sliding units 115 incorporates a motor and a drive to generate linear motion. The drive converts the rotational motion of the motor into linear motion, propelling a slider carriage attached with the rail unit along the rail unit to translate one or more boxes 114 as per the requirement.

[0062] The label applicator 111 is installed with each box to apply a grading label onto the harvest. The label applicator 111 comprises printer 111a configured to print a label containing a code generated by a label generator module integrated with the control unit.

[0063] The printer 111a in the label applicator 111 is responsible for producing high-resolution labels containing grading information and unique codes for each batch of harvested produce. The printer 111a receives data from the label generator module, including crop type, grade, and tracking information. Thermal or inkjet printing deposit ink or toner onto adhesive label material with precise alignment. The printer 111a operates in synchronization with the movement of the boxes 114, ensuring timely label production. By controlling print speed, resolution, and text alignment via the control unit, the printer 111a generates consistent, legible, and durable labels suitable for automated application onto the harvest.

[0064] The label generator module is an electronic unit integrated with the control unit that generates unique codes and grading information for each batch of harvest. The module processes data from the sorting and imaging modules, including quality, size, and grade, and formats this information into printable labels. The module ensures codes are unique and traceable for inventory and supply chain management. The module communicates with the printer 111a to trigger printing in synchronization with the movement of boxes 114. By automating label generation, the module reduces human error, improves traceability, and ensures that each harvested produce receives an accurate, machine-readable grading label.

[0065] For an example, in an apple packing facility, the label generator module receives grading data from the imaging system, such as size, color, and quality grade. The label generator generates a unique QR code for each apple batch, which is sent to the printer 111a. The printer 111a produces adhesive labels containing the grade and QR code, which the robotic arm 111b applies onto the apple crates. This ensures accurate traceability, reduces human error, and allows retailers to scan and verify produce quality efficiently.

[0066] The robotic arm 111b is installed in the box to apply adhesive on the printed label via the spout 111c provided as an end effector of the arm 111b. The robotic arm 111b contains an end effector and several segments that are attached together by motorized joints also referred to as axes. Each joints of the segments contains a step motor that rotates and allows the robotic arm 111b to complete a specific motion in translating the equipped end effector. The end effector further comprises of a pair of jaws hinged with each other by means of a bi-directional step motor. On actuation the step motor rotates and enables the opening/closing of the jaws of the effector to apply adhesive on the printed label via the spout 111c.

[0067] The spout 111c mentioned herein precisely dispensing adhesive onto printed labels before application onto the harvest. Adhesive is supplied from a reservoir through controlled tubing and regulated by the control unit to maintain consistent flow and pressure. The spout’s nozzle is designed to create uniform adhesive dots or lines according to label size and orientation. By coordinating with the robotic arm’s movements, the spout 111c accurately deposits adhesive on each label without excess or spillage, enabling secure attachment of labels to the harvest.

[0068] Additionally, the robotic limb 111d equipped with suction cup 111e is configured to pick and apply the label on the harvest. This ensures accurate application of grading labels on the produce for market distribution. The robotic limb 111d mentioned herein contains an end effector and several segments that are attached together by motorized joints also referred to as axes. Each joints of the segments contains a step motor that rotates and allows the robotic limb 111d to complete a specific motion in translating the equipped end effector. The end effector further comprises of a pair of jaws hinged with each other by means of a bi-directional step motor. On actuation the step motor rotates and enables the opening/closing of the jaws of the effector to pick and apply the label on the harvest.

[0069] The suction cup 111e mentioned herein is made up of rubber material. When the suction cup 111e is pushed on the surface removes the air inside the cup 111e which creates a partial vacuum inside. The air pressure outside is high in comparison to the partial vacuum inside the cup 111e which keeps the cup 111e attached to a surface. The rim of the suction cup 111e maintains an airtight seal between the cup 111e and the fixed surface by stopping the outside air from entering the cup 111e ensuring accurate application of grading labels on the produce for market distribution.

[0070] In an embodiment of the present invention, a holographic projection unit installed on the platform 101 to enable a view of the ongoing operation parameters. The holographic projection unit operates by generating three-dimensional images of operational data using interference and diffraction of coherent light, typically from a laser or LED source. Data from the control unit, such as harvest flow, sensor readings, and machine status, is converted into digital holograms. These holograms are projected onto a transparent or semi-transparent medium above the platform 101, creating a floating 3D visualization. The unit may employ spatial light modulators or beam-splitting optics to dynamically update the display in real-time.

[0071] The present invention works best in the following manner, where the system includes the platform 101, first receiving harvest onto the inclined panel 102 of the platform 101 through the bucket 103 attached via the eight- bar linkage 104. The linkage ensures smooth positioning and controlled placement of harvest onto the panel 102. The transfer arrangement 105, to gradually move harvest forward while the extendable barrier 106 on each lateral portion of the panel 102, actuated by pneumatic pusher 106b, prevent spillage. The sensing unit, including the hyperspectral camera, NIR sensor, colorimetric sensor, and odour sensor, continuously monitors harvest quality, transmitting data to the detection module integrated with the control unit. Based on the processed data, the articulated telescopic gripper 107 selectively removes spoiled harvest, placing it into the recess provided on the platform 101. The remaining harvest proceeds to the cleaning arrangement 108, where motorized rollers 108a with bristles scrub the produce, water sprinklers 108b spray cleaning water from the integrated tank 108c, and the underlying mesh collects waste water in a cavity.

[0072] Post-cleaning, the drying arrangement 109 receives harvest on the vibration-equipped flap. The quick-return vibration unit agitates harvest to remove surface water, while the dual-axis lead screw-mounted hot air blower 109c directs heated air over the produce. Moisture sensors regulate drying intensity to ensure uniform moisture removal. Subsequently, the wax application arrangement 112 sprays protective wax coating via nozzles 112a supplied from the wax compartment 112b. The imaging unit 113 captures waxed harvest and sends data to the sorting module, which determines grade based on quality and dimensions. Harvest is then directed through iris holes 110 into boxes 114 mounted on sliding units 115. The label applicator 111 prints grading labels through the printer 111a using codes from the label generator module, with the robotic arm 111b applying adhesive and the robotic limb 111d placing labels accurately on each harvested produce.

[0073] Although the field of the invention has been described herein with limited reference to specific embodiments, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternate embodiments of the invention, will become apparent to persons skilled in the art upon reference to the description of the invention. , Claims:1) A harvest cleaning and sorting system, comprising:

i) a platform 101 provided with an inclined panel 102 to receive harvest;
ii) a bucket 103 attached with the platform 101 by means of an eight bar linkage 104 to hold harvest and position onto the panel 102;
iii) a transfer arrangement 105 integrated in the panel 102 to move the harvest forward;
iv) an extendable barrier 106 provided along each lateral portion of the panel 102 to prevent falling of the harvest from the panel 102;
v) a sensing unit installed on the platform 101 to detect spoiled harvest carried on the panel 102;
vi) a detection module configured with a control unit to receive data from the sensing unit to determine spoiled harvest;
vii) an articulated telescopic gripper 107 installed over the platform 101 to pick harvest determined to be spoiled to place into a recess provided on the platform 101;
viii) a cleaning arrangement 108 provided on the platform 101 to clean harvest received from the panel 102;
ix) a drying arrangement 109 installed on the platform 101 to dry cleaned harvest;
x) a wax application arrangement 112 mounted on the platform 101 to apply a coating of wax on the harvest for preservation;
xi) an imaging unit 113 mounted on the platform 101 to capture images of the waxed harvest and feed into a sorting module configured with the control unit to determine grade of the harvest based on quality and dimensions;
xii) a plurality of iris holes 110 formed on the flap 109a to drop the harvest as per determined grade into one or more boxes 114 mounted underneath the platform 101 by means of sliding units 115; and
xiii) a label applicator 111 installed with the box to apply a grading label onto the harvest.

2) The system as claimed in claim 1, wherein the transfer arrangement 105 comprises sectioned member 105a provided in slot cut in the panel 102, at least one rotating cam 105b connected with the member 105a and the panel 102 to reciprocate the member 105a to move the harvest forward.

3) The system as claimed in claim 1, wherein the barrier 106 comprises a plate 106a attached laterally with the panel 102 by means of a pneumatic pusher 106b.

4) The system as claimed in claim 1, wherein the sensing unit comprises a hyperspectral camera capturing hyperspectral images of the harvest, an NIR (near infrared) sensor to detect near infrared emissions of the harvest, a colorimetric sensor to capture colour of the harvest and an odour sensor to detect odour emitted by the harvest.

5) The system as claimed in claim 1, wherein the cleaning arrangement 108 comprises a series of motorised rollers 108a attached parallel over the platform 101, bristles provided over each of the rollers 108a to scrub the harvest, a plurality of water sprinklers 108b disposed over the platform 101 and connected with a water tank 108c integrated with the platform 101, to spray water onto the harvest during scrubbing and a mesh provided underneath the rollers 108a to collect waste water in a cavity formed with the platform 101.

6) The system as claimed in claim 1, wherein the drying arrangement 109 comprises flap 109a configured with a vibration unit, mounted on the platform 101 to receive the harvest to agitate and remove water from the harvest, a dual axis lead screw arrangement 109b mounted on the on the platform 101 arranged perpendicularly with respect to the flap 109a to direct hot air onto the harvest via a hot air blower 109c mounted with the lead screw arrangement 109b.

7) The system as claimed in claim 1, wherein the vibration unit comprises a quick return arrangements connecting the flap 109a with the platform 101.

8) The system as claimed in claim 1, further comprising a plurality of moisture sensors integrated on the flap 109a to detect moisture on the surface of the harvest to accordingly regulate the drying arrangement 109 to dry the harvest.

9) The system as claimed in claim 1, wherein the wax application arrangement 112 comprises a plurality of nozzles 112a attached over the platform 101, connected with a wax compartment 112b provided on the platform 101 to spray the wax on the harvest.

10) The system as claimed in claim 1, wherein the label applicator 111 comprises printer 111a printing a label containing a code generated by a label generator module configured with the control unit, a robotic arm 111b installed in the box to apply adhesive on the printed label via a spout 111c provided as an end effector of the arm 111b, and a robotic limb 111d having a suction cup 111e to pick and apply the label on the harvest.