Description:TECHNICAL FIELD
[0001] The present invention relates to the field of agricultural equipment and systems, and more particularly to an automated precision fluid spraying system and apparatus for use in controlled-environment agriculture such as polyhouses.

BACKGROUND
[0002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[0003] In modern agriculture, precise delivery of pesticides, nutrient solutions, and other agrochemicals is essential for effective crop protection and optimized plant growth. However, conventional spraying methods often result in inconsistent application due to environmental influences such as wind, rainfall, and temperature fluctuations. These factors compromise dosage accuracy, leading to either over-application, causing chemical runoff, environmental contamination, and input wastage, or under-application, which risks inadequate pest control and reduced crop yield.
[0004] Traditional open-field spraying techniques commonly employ uniform blanket application, lacking the precision necessary for targeted and controlled delivery. This approach fails to accommodate the diverse needs of different crops and field zones, especially under variable environmental conditions. Moreover, most existing systems are not designed to support repeatable and accurate dosing, limiting their use in both research and precision farming. The challenge is further compounded when working with organic or plant-based formulations that require fine calibration but remain underutilized due to a lack of standardized equipment.
[0005] Despite advancements in agricultural mechanization, the integration of intelligent, environment-neutral spraying systems remains limited. Precision agriculture demands tools that can consistently deliver agrochemicals to defined locations at controlled rates, unaffected by external conditions. Conventional calibration methods often fall short of achieving this level of control, resulting in variable outcomes and reduced reliability in field trials and operational settings.
[0006] Therefore, there is a need for an improved spraying system that enables accurate, consistent, and reproducible delivery of agricultural fluids such as water, nutrient mixes, and plant protection chemicals.

OBJECTS OF THE PRESENT DISCLOSURE
[0007] A general object of the present disclosure is to provide a spray system capable of delivering pesticides, fertilizers, and other chemical solutions with high accuracy and uniformity to ensure optimal efficacy and minimize resource wastage.
[0008] An object of the present disclosure is to provide a system that functions efficiently in controlled environments, such as polyhouses, by eliminating external factors like wind, rainfall, and pressure variations that affect spray distribution and dosage accuracy.
[0009] Another object of the present disclosure is to provide a mechanism that enables precise dose calibration of chemical solutions for optimized application rates suitable for both research trials and operational agriculture.
[0010] Another object of the present disclosure is to provide a telescopic spray delivery tube with adjustable height to accommodate varying plant growth stages and ground levels for targeted chemical application.
[0011] Another object of the present disclosure is to provide a micro-sprinkler nozzle with adjustable spray radius to achieve consistent and uniform fluid distribution tailored to specific agricultural needs.
[0012] Another object of the present disclosure is to provide an automated system incorporating a stepper motor and control unit to achieve accurate movement of the spray carriage and controlled activation of the nozzle.
[0013] Another object of the present disclosure is to provide an efficient spraying solution that reduces environmental impact by minimizing chemical over-application and promoting sustainable agricultural practices.
[0014] Another object of the present disclosure is to provide a robust and reliable system constructed from low-friction sliding elements and corrosion-resistant materials to ensure durability and long-term operation.
[0015] Another object of the present disclosure is to provide a reliable platform for scientific research to evaluate and statistically calibrate the effectiveness of organic and inorganic plant inputs in a controlled environment.
[0016] Another object of the present disclosure is to provide a user-friendly and maintainable spraying system with modular components and independent on/off switches for the spray carriage and nozzle.

SUMMARY
[0017] Aspects of the present disclosure relate generally to the field of agricultural equipment and systems, and more particularly to an automated precision fluid spraying system and apparatus for use in controlled-environment agriculture such as polyhouses. The proposed system and apparatus address need for precise, consistent, and efficient fluid delivery in protected cultivation environments, overcoming limitations of conventional manual or fixed spraying devices.
[0018] The present disclosure relates to a system and apparatus for spraying fluid in agricultural environments that includes a linear guide assembly supported by at least two vertical stands. A movable carriage is mounted on the linear guide assembly and is configured to traverse a horizontal path. A telescopic tube is mounted on the carriage and is adjustable in height between a first length and a second length. At least one nozzle is attached to the telescopic tube, and the nozzle is adapted to produce a micro-sprinkler spray pattern with a variable radius. A stepper motor is operatively coupled to the carriage for controlled movement of the carriage along the linear guide assembly. A control unit is operatively coupled to the stepper motor and the nozzle. The control unit is configured to control the speed and position of the carriage along the linear guide assembly and also to manage the activation timing and duration of the nozzle. One or more solenoid valves are fluidically coupled to a fluid supply line and are operatively connected to the control unit to regulate the delivery of fluid to the nozzle.
[0019] In an aspect, the control unit is enclosed in a housing that integrates a relay module, a Switched-Mode Power Supply, and one or more switches. These switches are configured to selectively activate or deactivate the carriage and the nozzle. The relay module is adapted to manage power switching to the stepper motor and the solenoid valves. The Switched-Mode Power Supply delivers power to the stepper motor, the control unit, and the solenoid valves.
[0020] In an aspect, the linear guide assembly includes a top support configured to structurally hold the linear guide and the carriage.
[0021] In an aspect, the stepper motor is secured in place using a motor clamp fixed to the linear guide assembly.
[0022] In an aspect, the system and apparatus further include a container mounting clamp configured to hold fluid containers that supply fluid to the telescopic tube.
[0023] In an aspect, the system and apparatus enable controlled horizontal displacement of the carriage and vertical adjustment of the telescopic tube, thereby facilitating precise and efficient fluid application under constant pressure conditions in agricultural settings.

BRIEF DESCRIPTION OF DRAWINGS
[0024] The accompanying drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure. The diagrams are for illustration only, which thus is not a limitation of the present disclosure.
[0025] FIG. 1 illustrates an exemplary block diagram of a proposed system to spray fluid in agricultural environments, in accordance with an embodiment of the present disclosure.
[0026] FIG. 2A illustrates an exemplary schematic view of a linear guide assembly of proposed system, in accordance with an embodiment of the present disclosure.
[0027] FIG. 2B illustrates an exemplary side view of the proposed linear guide assembly of proposed system, in accordance with an embodiment of the present disclosure.
[0028] FIGs. 3A and 3B illustrate exemplary views of a nozzle attached to the telescopic tube, in accordance with an embodiment of the present disclosure.
[0029] FIG. 4A illustrates an exemplary front view of a housing enclosing multiple components, in accordance with an embodiment of the present disclosure.
[0030] FIG. 4B illustrates an exemplary side view of the housing enclosing multiple components, in accordance with an embodiment of the present disclosure.
[0031] FIG. 4C illustrates an exemplary internal view of the housing enclosing multiple components, in accordance with an embodiment of the present disclosure.
[0032] FIG. 5 illustrates an exemplary flowchart depicting the process of operation of the proposed system, in accordance with an embodiment of the present disclosure.

DETAILED DESCRIPTION OF THE PRESENT INVENTION
[0033] The following is a detailed description of embodiments of the disclosure represented in the accompanying drawings. The disclosed embodiments are merely exemplary of the invention, which may be embodied in various forms. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.
[0034] If the specification states a component or feature “may”, “can”, “could”, or “might” be included or have a characteristic, that particular component or feature is optional and not required to be included or have the characteristic.
[0035] As used in the description herein and the claims, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[0036] Embodiments of the present disclosure relate to the field of agricultural equipment and systems, specifically to automated precision spraying systems designed for controlled application of fluids such as pesticides, fertilizers, and other nutrient solutions. More particularly, the invention pertains to a spray system and apparatus that enables accurate dose calibration and uniform fluid distribution under controlled environmental conditions, minimizing external factors such as wind, rainfall, and pressure variations.
[0037] The proposed system and apparatus includes a linear guide assembly supported by at least two vertical stands. A movable carriage is mounted on the linear guide assembly and is configured to traverse a horizontal path. A telescopic tube is mounted on the carriage and is adjustable in height between a first length and a second length. At least one nozzle is attached to the telescopic tube, and the nozzle is adapted to produce a micro-sprinkler spray pattern with a variable radius. A stepper motor is operatively coupled to the carriage for controlled movement of the carriage along the linear guide assembly. A control unit is operatively coupled to the stepper motor and the nozzle. The control unit is configured to control the speed and position of the carriage along the linear guide assembly and also to manage the activation timing and duration of the nozzle. One or more solenoid valves are fluidically coupled to a fluid supply line and are operatively connected to the control unit to regulate the delivery of fluid to the nozzle.
[0038] Various embodiments with respect to the present disclosure will be explained in detail with reference to FIGs. 1-5.
[0039] Referring to FIG. 1, a block diagram (100) of a proposed system (102) for spraying fluid, such as, but not limited to, water, nutrient solutions, pesticides, or organic treatments, in controlled-environment agriculture such as polyhouses is disclosed. The system (102) includes a linear guide assembly (104) that serves as foundational structure for horizontal movement within a spraying mechanism. This linear guide assembly (104) is supported by at least two vertical stands (108), which provide necessary structural stability to maintain alignment and balance during operation, as shown in FIGs. 2A and 2B. A movable carriage (106) (i.e. sliding element) is mounted on the linear guide assembly (104) and is configured to traverse along a horizontal path. This movement allows the carriage (106) to cover target area uniformly, thereby facilitating even distribution of fluids across crops.
[0040] The linear guide assembly (104) includes a top support (110) that is configured to structurally hold the carriage (106). This top support (110) provides a stable and secure platform on which the carriage (106) is mounted, allowing it to move smoothly and accurately along the defined horizontal path. The structural configuration of the top support ensures proper alignment and balance of the carriage (106) during traversal, contributing to uniform spray coverage and reliable system performance in controlled environments.
[0041] In an embodiment, the carriage (106) fabricated from iglidur® J, a high-performance polymer known for its excellent low-friction and wear-resistant characteristics. This material minimizes mechanical resistance during carriage traversal, contributing to smooth and precise motion while reducing maintenance requirements and energy consumption.
[0042] In addition, the linear guide assembly (104) is constructed from die-cast zinc, a material chosen for its high strength, durability, and inherent resistance to corrosion. This ensures reliable operation over extended periods, even in high-humidity environments typical of polyhouses or other controlled-environment agricultural settings. The synergy between the iglidur® J sliding element and the die-cast zinc construction provides a robust, maintenance-friendly, and environmentally suitable solution for precision spraying systems. The combination is particularly advantageous for use in enclosed or moisture-prone conditions, where traditional materials might degrade or seize over time.
[0043] In an embodiment, the system (102) includes a telescopic tube (112), an upper end of the telescopic tube (112) is mounted on the movable carriage (106) and extends downward toward ground, as shown in FIG. 2A. The telescopic tube (112) is adjustable in height between a first length, representing a minimum height of approximately 56 cm, and a second length, corresponding to a maximum height of approximately 96 cm. It is to be understood that these lengths are not limiting, and the telescopic tube (112) may be configured for other ranges depending on the specific application or crop requirements. The height adjustability of the telescopic tube (112) enables the system (102) to adapt dynamically to varying plant growth stages and different ground level conditions. This ensures that the fluid is delivered at the optimal height relative to the plant canopy, thereby enhancing precision and minimizing spray drift or fluid wastage.
[0044] In addition, at least one nozzle (114) (as shown in FIGs. 3A and 3B) is attached to a lower end of the telescopic tube (112). The nozzle (114) is configured to generate a micro-sprinkler spray pattern with a variable spray radius, adjustable between approximately 0.6 meters and 1.2 meters. The nozzle (114) comprises an adjustable mechanism configured to vary the spray radius by altering either the nozzle aperture or the spray angle. This adjustable spray pattern enables customized fluid delivery, allowing for concentrated application in areas with dense foliage or broader coverage in sparsely planted zones. Such flexibility enhances application precision, minimizes fluid wastage, and supports diverse agricultural layouts and crop requirements. These telescopic tube (112) and adjustable nozzle (114) form a versatile delivery mechanism capable of precisely targeting specific crop zones, thereby supporting effective fluid distribution, minimizing over or under-application, and contributing to efficiency of the system (102) in controlled-environment agricultural setups such as polyhouses.
[0045] In an embodiment, the system (102) includes a stepper motor (116) operatively coupled to the movable carriage (106). This stepper motor (116) is configured to drive carriage (106) along the linear guide assembly (104), enabling its controlled horizontal movement across the spraying area. The use of a stepper motor (116) is particularly advantageous in this context because of its ability to provide incremental and highly precise motion control. Unlike conventional motors, stepper motors move in discrete steps, allowing position of the carriage (106) to be accurately determined and repeated as needed. This predictable motion behaviour ensures that the carriage (106) travels uniformly and consistently over guide path.
[0046] By enabling precise traversal, the stepper motor (116) contributes to even fluid distribution and consistent spray application across entire target area. This uniformity is essential in controlled-environment agriculture, where maintaining a consistent dose of sprayed fluid (e.g., pesticides, nutrients, or water) across different plant beds is essential for crop uniformity, input efficiency, and scientific experimentation. Furthermore, integration of the stepper motor (116) allows the system (102) to be automated or programmed for repetitive tasks, reducing the need for manual control and enhancing operational efficiency.
[0047] In an embodiment, the system (102) includes a control unit (120) operatively coupled to both the stepper motor (116) and the nozzle (114). The control unit (120) is configured to manage the speed and position of the spray carriage (106) as it moves along the linear guide assembly (104), ensuring precise and uniform traversal. Additionally, the control unit (120) controls the activation timing and duration of the nozzle (114), allowing chemical solutions to be sprayed with high accuracy and only when required, thereby minimizing wastage.
[0048] In addition, the control unit (120) is enclosed within a housing (122), as shown in FIGs. 4A, 4B and 4C, which act as a protective enclosure to safeguard the electronic components from environmental exposure, especially in moisture-prone areas like polyhouses. Within this housing (122), a relay module (124), a Switched-Mode Power Supply (SMPS) (126), and one or more switches (128-1, 128-2, and 128-3) are positioned. The relay module (124) is configured to control power switching to the stepper motor and the one or more solenoid valves responsible for nozzle operation. The SMPS (126) is designed to supply regulated power to the stepper motor (116), and the control unit (120) ensuring consistent performance across all components.
[0049] The switches housed in the control unit (120) perform specific functions. Switch (128-1) can serve as a general on/off switch to power the system. Switch (128-2) can control the spray operation, allowing the user to manually start or stop the fluid dispensing. Switch (128-3) can function as a limit switch, which may be used to define the operational boundaries or endpoints for movement of the carriage (106), thereby preventing over-travel and ensuring system safety.
[0050] In addition, the housing (122) includes a power indicator (132) configured to visually indicate the operational status of the system (102), such as whether the system (102) is powered on or off, thereby assisting the user in monitoring system readiness and ensuring safe operation.
[0051] In an embodiment, the system (102) includes one or more solenoid valves (130) fluidically coupled to a fluid supply line and operatively connected to the control unit (120). The solenoid valves (130) are configured to regulate flow of fluid to the nozzle (114). These solenoid valves (130) receive power from the SMPS (126). When activated by the control unit (120), the solenoid valves (130) open or close in accordance with predefined commands, enabling controlled and precise delivery of fluid to the nozzle based on the spraying requirements. This regulation is particularly important under constant pressure conditions, as it ensures accurate dose calibration and consistent spray distribution across the target area. The precise control of fluid delivery enabled by the solenoid valves (130) contributes to improved efficiency, reduced wastage, and uniform application of chemical solutions, making the system suitable for research as well as operational agricultural tasks.
[0052] Referring to FIG. 5, an exemplary flow chart (500) depicts process of operation of the proposed system (102). At step (502), the control unit (120) is powered on, initiating the system and activating the SMPS (126) to supply power to the control components including the stepper motor (116) and solenoid valves (130). At step (504), the user selects the desired operation mode using the switches (128-1, 128-2, 128-3), which may include activating the carriage (106), nozzle (114), or setting movement limits. At step (506), the stepper motor (116) moves the carriage (106) along the linear guide assembly (104) according to the predefined speed and position parameters stored in the control unit (120). At step (508), the control unit (120) activates the solenoid valve (130), which allows the fluid to pass through to the nozzle (114) for spraying. At step (510), the nozzle (114) delivers the fluid in a micro-sprinkler spray pattern with an adjustable radius depending on the settings. At step (512), after completing the spray operation along the defined path, the control unit (120) stops the movement of the carriage (106) and deactivates the solenoid valve (130), thereby concluding the operation cycle.
[0053] In another embodiment, the present disclosure discloses an apparatus (not shown) (i.e. complete setup) that includes a linear guide assembly (104) supported by at least two vertical stands providing structural stability. A movable carriage (106) is mounted on the linear guide assembly (104) and configured to traverse a horizontal path. The linear guide assembly (104) includes a top support (110) configured to structurally hold the carriage (106). A telescopic tube (112) is mounted on the carriage (106), adjustable in height between a first length and a second length. At least one nozzle (114) is attached to the telescopic tube (112), wherein the nozzle (114) is adapted to produce a micro-sprinkler spray pattern with a variable radius. A stepper motor (116) is operatively coupled to the carriage (106) for controlled movement along the linear guide assembly (104). The stepper motor (116) is secured using a motor clamp (not shown) fixed to the linear guide assembly (104). A control unit (120) is operatively coupled to the stepper motor (116) and the at least one nozzle (114), configured to control the movement of the carriage (106) and activation of the nozzle (114). One or more solenoid valves (130) are fluidically coupled to a fluid supply line and operatively connected to the control unit (120) to control delivery of fluid to the nozzle (114). The apparatus is configured to enable controlled horizontal displacement of the carriage (106) and vertical adjustment of the telescopic tube (112) for fluid application under constant pressure conditions.
[0054] The apparatus further includes a container mounting clamp (not shown) configured to hold one or more containers supplying fluid to the telescopic tube (112).
[0055] The apparatus further includes a control unit (120) housed in a housing (122) that includes a relay module (124), a Switched-Mode Power Supply (SMPS) (126), and one or more switches (128).
[0056] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions, or examples, which are included to enable those having ordinary skill in the art to make and use the invention when combined with information and knowledge available to those having ordinary skill in the art.

ADVANTAGES OF THE PRESENT DISCLOSURE
[0057] The present disclosure provides a system that ensures accurate dose calibration and uniform spray distribution to minimize resource wastage and enhance the effectiveness of chemical applications.
[0058] The present disclosure provides an adaptable spray mechanism featuring a telescopic tube with adjustable height and a nozzle with variable spray radius to accommodate diverse agricultural needs, including different plant growth stages and ground levels.
[0059] The present disclosure provides an automated spraying solution by integrating a stepper motor and control unit to reduce manual intervention and deliver consistent application results.
[0060] The present disclosure provides a durable and reliable system constructed with low-friction sliding elements and corrosion-resistant materials for smooth operation in controlled agricultural environments.
[0061] The present disclosure provides an environmentally responsible spraying system that minimizes chemical over-application and under-application to support sustainable agricultural practices.
[0062] The present disclosure provides a scientifically robust platform for evaluating the efficacy of organic and inorganic plant-based inputs through accurate dose calibration and reproducible spray conditions.
, Claims:1. A system (102) to spray fluid in agricultural environments, the system comprising:
  a linear guide assembly (104) supported by at least two vertical stands (108);
a movable carriage (106) mounted on said linear guide assembly (104), configured to traverse a horizontal path;
a telescopic tube (112) mounted on the carriage (106), adjustable in height between a first length and a second length;
at least one nozzle (114) attached to said telescopic tube (112), wherein the at least one nozzle (114) is adapted to produce a micro-sprinkler spray pattern with a variable radius;
a stepper motor (116) operatively coupled to the carriage for controlled movement of the carriage along a top support (110) of the linear guide assembly (104);
a control unit (120) operatively coupled to the at least one nozzle (114) and the stepper motor (116), the control unit (120) being configured to:
control speed and position of the carriage (106) along the linear guide assembly (104), and
control activation timing and duration of the at least one nozzle (114); and
one or more solenoid valves (130) fluidically coupled to a fluid supply line and operatively coupled to the control unit (120) to control delivery of fluid to the at least one spray nozzle (114).
2. The system (102) as claimed in claim 1, wherein the at least one nozzle (114) comprises an adjustable mechanism configured to vary the spray radius between 0.6 meters and 1.2 meters by changing the nozzle aperture or spray angle.
3. The system (102) as claimed in claim 1, wherein the control unit (120) is housed in a housing (122) that includes a relay module (124), a Switched-Mode Power Supply (SMPS) (126), and one or more switches (128-1, 128-2,128-3).
4. The system (102) as claimed in claim 3, wherein the relay module (124) is configured to control power switching to the stepper motor (116) and the one or more solenoid valves (130).
5. The system (102) as claimed in claim 3, wherein the Switched-Mode Power Supply (SMPS) (126) is configured to deliver power to the stepper motor (116) and the one or more solenoid valves (130).
6. An apparatus for spraying fluid in agricultural environments, comprising:
  a linear guide assembly (104) supported by at least two vertical stands (108);
a movable carriage (106) mounted on said linear guide assembly (104), configured to traverse a horizontal path;
a telescopic tube (112) mounted on the carriage (106), adjustable in height between a first length and a second length;
at least one nozzle (114) attached to said telescopic tube (112), wherein the at least one nozzle (114) is adapted to produce a micro-sprinkler spray pattern with a variable radius;
a stepper motor (116) operatively coupled to the carriage (106) for controlled movement of the carriage (106) along a top support (110) of the linear guide assembly (104);
a control unit (120) operatively coupled to the stepper motor (116) and the at least one nozzle (114), the control unit (120) configured to control the movement of the carriage (106) and activation of the at least one nozzle (114); and
one or more solenoid valves (130) fluidically coupled to a fluid supply line and operatively coupled to the control unit (120) to control delivery of fluid to the at least one nozzle (114);
wherein the apparatus is configured to enable controlled horizontal displacement of the carriage (106) and vertical adjustment of the telescopic tube (112) for fluid application under constant pressure conditions.
7. The apparatus as claimed in claim 6, wherein the linear guide assembly (104) includes a top support configured to structurally hold the carriage (106).
8. The apparatus as claimed in claim 6, wherein the stepper motor (116) is secured using a motor clamp fixed to the linear guide assembly.
9. The apparatus as claimed in claim 6, further comprises a container mounting clamp configured to hold one or more containers to supply fluid to the telescopic tube (112).
10. The apparatus as claimed in claim 6, wherein the control unit (120) is housed in a housing (122) that includes a relay module (124), a Switched-Mode Power Supply (SMPS) (126), and one or more switches (128-1, 128-2, 128-3).