Claims:1. A system for measuring quality of liquid, the system comprising:
a test strip comprising a plurality of sensing pads responsive to one or more parameters in the liquid when at least a portion of the test strip comes into contact with the liquid, the one or more parameters being associated with the quality of liquid;
a housing having a slit to receive the at least a portion of the test strip after the test strip comes into contact with the liquid;
an image capturing unit configured with an aperture of the housing, the image capturing device being configured to capture one or more images of the at least a portion of the test strip; and
a control unit communicatively coupled with the image capturing device, the control unit comprising one or more processors communicatively coupled to a memory, the memory storing one or more instructions executable by the one or more processors, the control unit being configured to:
receive a set of data packets associated with the captured one or more images from the image capturing unit; and
extract one or more attributes from the received set of data packets; and
determine the one or more parameters and corresponding concentrations based on the extracted the one or more attributes.
2. The system as claimed in claim 1, wherein the one or more attributes comprise RGB values associated with coloured segments of the captured image of the test strip, and wherein the RGB values are presented into a Hex colour code.
3. The system as claimed in claim 2, wherein the RGB values are normalized into a predetermined dimension of arrays, and wherein the control unit is configured to generate one or more liquid utility advisories based on the determined one or more parameters and corresponding concentrations.
4. The system as claimed in claim 3, wherein the one or more parameters comprise any one or a combination of pH, total hardness, total alkalinity, carbonate, total chlorine, free chlorine, fluoride, bromine, nitrate, sulphate, lead, iron, copper, hexavalent chromium, and mercury, and wherein one or more liquid utility advisories comprises suggestion on health impact, possible sources of contamination, the best possible treatment processes, possible utilities of the liquid including drinking cleaning, and lubricant.
5. The system as claimed in claim 1, wherein the control unit is configured to compare the extracted one or more attributes with predetermined values stored in a database to determine concentrations of one or more parameters associated with the water quality, and wherein the control unit is configured to determine time taken in determination of the one or more parameters, type of liquid sample, and a test report comprising the one or more parameters and corresponding concentrations.
6. The system as claimed in claim 1, wherein the housing is collapsible and configured to move between an assembled position and a projected position, and wherein the housing comprises a lower portion and an upper portion movably configured to move with respect to the lower portion.
7. The system as claimed in claim 1, wherein the image capturing device is configured at the aperture positioned at the top of the housing with wide-angle and macro lens, and wherein the system comprises a communication module that establishes a connection between the control unit and a cloud server.
8. The system as claimed in claim 1, wherein the housing comprises test strip holder configured to hold the test strip and a standard colour reference chart, wherein the image capturing device is configured to capture an image of the test strip holder and the standard colour reference chart, and wherein the standard colour reference chart facilitates calibration the image capturing device.
9. The system as claimed in claim 8, wherein the housing comprises a test strip cartridge storage unit configured at the bottom of the test strip holder, wherein the test strip cartridge storage unit is configured to store a plurality of test strips.
10. The system as claimed in claim 1, wherein each of the plurality of sensing pads is made of cellulose fiber, and wherein each of the plurality of sensing pads are positioned at predefined distance from each other in a mesh-type structure.

Description:TECHNICAL FIELD
[0001] The present disclosure relates generally to measurement of liquid quality. More particularly, the present disclosure relates to quantitative, colorimetric-based measurement of the liquid quality with more accuracy, consistency and reliability.

BACKGROUND
[0002] The 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] Global water availability and quality is constantly changing. As a result, monitoring water sources for quality becomes essential to ensure safety of the society. In an example, consumers of water from the water sources may be warned in response to detecting a contamination of the water. Predicting water quality enables preventative steps to be taken. Presently, monitoring several parameters for water quality is mostly performed by off-site laboratory-based methods with the trained analyst. However, collection and transportation of water samples require special care (filtration, preservation, refrigeration at 4°C, etc.). In addition, laboratory-based analyses are expensive due to requirements of sophisticated analytical instruments. On-site calibration of hand-held digital instruments require trained operators and multiple calibration solutions, and therefore are not user friendly. In addition, the existing water quality testing systems are not capable of identifying different analytes associated with the water quality simultaneously.
[0004] There is therefore a need in the art for an improved liquid quality measurement system, which overcomes above-mentioned and other limitations of existing approaches.
[0005] All publications herein are incorporated by reference to the same extent as if each individual publication or patent application were specifically and individually indicated to be incorporated by reference. Where a definition or use of a term in an incorporated reference is inconsistent or contrary to the definition of that term provided herein, the definition of that term provided herein applies and the definition of that term in the reference does not apply.
[0006] In some embodiments, the numbers expressing quantities of ingredients, properties such as concentration, reaction conditions, and so forth, used to describe and claim certain embodiments of the invention are to be understood as being modified in some instances by the term “about.” Accordingly, in some embodiments, the numerical parameters set forth in the written description and attached claims are approximations that can vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, the numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of some embodiments of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as practicable. The numerical values presented in some embodiments of the invention may contain certain errors necessarily resulting from the standard deviation found in their respective testing measurements.

OBJECTS OF THE INVENTION
[0007] A general object of the present disclosure is to provide an improved liquid quality measurement system that is capable to measure multiple parameters associated with liquid quality at the same time.
[0008] An object of the present disclosure is to provide an improved liquid quality measurement system that can be automatically self-calibrated using a standard colour reference chart to reduce bias from variations in ambient lighting.
[0009] Another object of the present disclosure is to provide an improved liquid quality measurement system that is cost-effective and easy to implement.
[0010] Another object of the present disclosure is to provide an improved liquid quality measurement system with a collapsible box that can be folded easily, thereby making the system portable.

SUMMARY
[0011] The present disclosure relates generally to measurement of liquid quality. More particularly, the present disclosure relates to quantitative, colorimetric-based measurement of the liquid quality with more accuracy, consistency and reliability.
[0012] In an aspect, the present disclosure a system for measuring quality of liquid, the system comprising: a test strip comprising a plurality of sensing pads responsive to one or more parameters in the liquid when at least a portion of the test strip comes into contact with the liquid, the one or more parameters being associated with the quality of water; a housing having a slit to receive the at least a portion of the test strip after the test strip comes into contact with the liquid; an image capturing unit configured with an aperture of the housing, the image capturing device being configured to capture one or more images of the at least a portion of the test strip; a control unit communicatively coupled with the image capturing device, the control unit comprising one or more processors communicatively coupled to a memory, the memory storing one or more instructions executable by the one or more processors, the control unit being configured to: receive a set of data packets associated with the captured one or more images from the image capturing unit; extract one or more attributes from the received set of data packets; and determine the one or more parameters and corresponding concentrations based on the extracted the one or more attributes.
[0013] In an embodiment, the one or more attributes comprise RGB values associated with coloured segments of the captured image of the test strip, and wherein the RGB values are presented into a Hex colour code.
[0014] In an embodiment, the RGB values are normalized into a predetermined dimension of arrays, and wherein the control unit is configured to generate one or more liquid utility advisories based on the determined one or more parameters and corresponding concentrations.
[0015] In an embodiment, the one or more parameters comprise any one or a combination of pH, total hardness, total alkalinity, carbonate, total chlorine, free chlorine, fluoride, bromine, nitrate, sulphate, lead, iron, copper, hexavalent chromium, and mercury, and wherein one or more liquid utility advisories comprises suggestion on health impact, possible sources of contamination, the best possible treatment processes, possible utilities of the liquid including drinking cleaning, and lubricant.
[0016] In an embodiment, the control unit is configured to compare the extracted one or more attributes with predetermined values stored in a database to determine concentrations of one or more parameters associated with the water quality, and wherein the control unit is configured to determine time taken in determination of the one or more parameters, type of liquid sample, and a test report comprising the one or more parameters and corresponding concentrations.
[0017] In an embodiment, the housing is collapsible and configured to move between an assembled position and a projected position, and wherein the housing comprises a lower portion and an upper portion movably configured to move with respect to the lower portion.
[0018] In an embodiment, the image capturing device is configured at the aperture positioned at the top of the housing with wide-angle and macro lens, and wherein the system comprises a communication module that establishes a connection between the control unit and a cloud server.
[0019] In an embodiment, the housing comprises test strip holder configured to hold the test strip and a standard colour reference chart, wherein the image capturing device is configured to capture an image of the test strip holder and the standard colour reference chart, and wherein the standard colour reference chart facilitates calibration the image capturing device.
[0020] In an embodiment, the housing comprises a test strip cartridge storage unit configured at the bottom of the test strip holder, wherein the test strip cartridge storage unit is configured to store a plurality of test strips.
[0021] In an embodiment, each of the plurality of sensing pads is made of cellulose fiber, and wherein each of the plurality of sensing pads are positioned at predefined distance from each other in a mesh-type structure.
[0022] Various objects, features, aspects and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.

BRIEF DESCRIPTION OF THE DRAWINGS
[0023] 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.
[0024] FIGs. 1A-1C illustrate exemplary representations of isometric views of a liquid quality measuring system, in accordance with embodiments of the present disclosure.
[0025] FIGs. 2A and 2B illustrate an exemplary representation of the upper portion and lower portion of housing of the liquid quality measurement system, respectively, in accordance with embodiments of the present disclosure.
[0026] FIGs. 3A-3C illustrate exemplary representations of test strip of the liquid quality measurement system, in accordance with embodiments of the present disclosure.
[0027] FIG. 4 illustrates an exemplary representation of test strip holder 206 of the liquid quality measurement system, in accordance with embodiments of the present disclosure.
[0028] FIGs. 5A-5E illustrate exemplary representations of the liquid quality measuring system with a test strip cartridge storage unit, in accordance with embodiments of the present disclosure.
[0029] FIGs. 6A-6C illustrate exemplary representations of test strip of the liquid quality measurement system, in accordance with embodiments of the present disclosure.
[0030] FIGs. 7A-7D illustrate exemplary representations of a reference standard colour chart of the liquid quality measurement system, in accordance with embodiments of the present disclosure.
[0031] FIGs. 8A-8F illustrate exemplary representations of transitioning of a housing of the liquid quality measurement system from a projected position to an assembled position, in accordance with embodiments of the present disclosure.
[0032] FIG. 9 illustrates an exemplary representation of a flow diagram of working of the liquid quality measurement system with a cloud server, in accordance with embodiments of the present disclosure.
[0033] FIG. 10 illustrates an exemplary representation of a flow diagram representing a sequence for operating of the liquid quality measurement system, in accordance with embodiments of the present disclosure.

DETAILED DESCRIPTION
[0034] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such details 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.
[0035] In the following description, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the present invention. It will be apparent to one skilled in the art that embodiments of the present invention may be practiced without some of these specific details. 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 not required to be included or have the characteristic.
[0036] As used in the description herein and throughout the claims that follow, 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.
[0037] Exemplary embodiments will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete and will fully convey the scope of the invention to those of ordinary skill in the art. Moreover, all statements herein reciting embodiments of the invention, as well as specific examples thereof, are intended to encompass both structural and functional equivalents thereof. Additionally, it is intended that such equivalents include both currently known equivalents as well as equivalents developed in the future (i.e., any elements developed that perform the same function, regardless of structure).
[0038] The present disclosure generally relates to measurement of liquid quality. More particularly, the present disclosure relates to quantitative, colorimetric-based measurement of the liquid quality with more accuracy, consistency and reliability.
[0039] In an aspect, the present disclosure a system for measuring quality of liquid, the system including: a test strip comprising a plurality of sensing pads responsive to one or more parameters in the liquid when at least a portion of the test strip comes into contact with the liquid, the one or more parameters being associated with the quality of water; a housing having a slit to receive the at least a portion of the test strip after the test strip comes into contact with the liquid; an image capturing unit configured with an aperture of the housing, the image capturing device being configured to capture one or more images of the at least a portion of the test strip; a control unit communicatively coupled with the image capturing device, the control unit comprising one or more processors communicatively coupled to a memory, the memory storing one or more instructions executable by the one or more processors, the control unit being configured to: receive a set of data packets associated with the captured one or more images from the image capturing unit; extract one or more attributes from the received set of data packets; and determine the one or more parameters and corresponding concentrations based on the extracted the one or more attributes.
[0040] In an embodiment, the one or more attributes may include RGB values associated with coloured segments of the captured image of the test strip, and wherein the RGB values are presented into a Hex colour code.
[0041] In an embodiment, the RGB values may be normalized into a predetermined dimension of arrays, and wherein the control unit may be configured to generate one or more liquid utility advisories based on the determined one or more parameters and corresponding concentrations.
[0042] In an embodiment, the one or more parameters may include any one or a combination pH, total hardness, total alkalinity, carbonate, total chlorine, free chlorine, fluoride, bromine, nitrate, sulphate, lead, iron, copper, hexavalent chromium, mercury, and wherein one or more liquid utility advisories may include suggestion on health impact, possible sources of contamination, the best possible treatment processes, possible utilities of the liquid including drinking cleaning, and lubricant.
[0043] In an embodiment, the control unit may be configured to compare the extracted one or more attributes with predetermined values stored in a database to determine concentrations of one or more parameters associated with the water quality, and wherein the control unit may be configured to determine time taken in determination of the one or more parameters, type of liquid sample, and a test report comprising the one or more parameters and corresponding concentrations.
[0044] In an embodiment, the housing may be collapsible and configured to move between an assembled position and a projected position, and wherein the housing may include a lower portion and an upper portion movably configured to move with respect to the lower portion.
[0045] In an embodiment, the image capturing device may be configured at the aperture positioned at the top of the housing with wide-angle and macro lens, and wherein the system comprises a communication module that establishes a connection between the control unit and a cloud server.
[0046] In an embodiment, the housing may include a test strip holder configured to hold the test strip and a standard colour reference chart, wherein the image capturing device may be configured to capture an image of the test strip holder and the standard colour reference chart, and wherein the standard colour reference chart facilitates calibration the image capturing device.
[0047] In an embodiment, the housing may include a test strip cartridge storage unit configured at the bottom of the test strip holder, wherein the test strip cartridge storage unit may be configured to store a plurality of test strips.
[0048] In an embodiment, each of the plurality of sensing pads may be made of cellulose fiber, and wherein each of the plurality of sensing pads may be positioned at predefined distance from each other in a mesh-type structure.
[0049] Embodiments explained herein relate to a simple and efficient liquid quality measuring system for measuring quality of liquid such as water, glucose specifically determine/identify concentration of one or more parameters such as pH, total hardness, total alkalinity, carbonate, total chlorine, free chlorine, fluoride, bromine, nitrate, sulphate, lead, iron, copper, hexavalent chromium, mercury, and so on. The measuring system is provided with a particular test strip that has a unique arrangement of sensing pad, which prevents any interferences from adjacent sensing pads, thereby achieving efficient operation of the measuring system. In addition, the measuring system has a housing that can be collapsible, thereby enabling dispatching of the measuring system easily.
[0050] FIGs. 1A-1C illustrate exemplary representations of isometric views of a liquid quality measuring system, in accordance with embodiments of the present disclosure. As illustrated in FIG. 1A, the liquid quality measuring system 100 (hereafter referred to as the system 100) may include a test strip 101 that may come into contact with a sample of liquid with a predetermined amount in order to sense or determine one or more parameters associated with quality of liquid. The test strip 101 may include a plurality of sensing pads 101-1 responsive to one or more parameters in the liquid when at least a portion of the test strip 101 comes into contact with the liquid, where the one or more parameters may be associated with the quality of liquid. The one or more parameters may be unknown at this stage, however, the plurality of sensing pads in the test strip may change its colour when at least a portion of the test strip 101 comes in contact with the sample of the liquid. The change in colour of the sensing pads 101-1 may be responsive to the one or more parameters present in the sample of liquid.
[0051] In an embodiment, the system 100 may include a housing 103 having a slit 103-1 to receive the at least a portion of the test strip after the test strip comes into contact with the liquid. When the test strip comes in contact with the liquid, its colour gets changed and then the test strip may be removed from the sample and pushed into the slit 103-1 of the housing 103. In an exemplary embodiment, the slit 103-1 may be in a rectangular shape and bigger in size compared to the test strip 101. The slit 103-1 may be configured at the side surface of the housing 103. The housing 103 may be configured as a rectangular box, which may have a lower portion 103-2 and an upper portion 103-3. The upper portion 103-3 may be movably configured to move with respect to the lower portion 103-2. In another embodiment, the housing 103 may be collapsible, particularly configured to move between an assembled position and a projected position.
[0052] In an embodiment, the system 100 may include an image capturing unit 105 that may be configured with an aperture 103-4 of the housing. The image capturing unit 105 may be configured to capture one or more images of the at least a portion of the test strip. The image capturing unit 105 may include, by way of example but not limited to, a camera configured at the computing device, where the computing device may be a computing device associated with industrial equipment or an industrial equipment based asset, a smart phone, a portable computer, a smart camera, a personal digital assistant, a handheld device and the like. In an embodiment, wide-angle and macro lens may be provided at the aperture 103-4 at which the image capturing unit 105 is configured. FIG. 1A illustrates the system 100 without the image capturing unit 105, whereas FIG. 1B illustrates the system 100 with the image capturing unit 105. As shown in FIGs. 1A and 1B, the system 100 may include one or more clips 106 positioned at top of the upper portion 103-3 of the housing 103, where the one or more clips 106 may be configured to hold the image capturing unit 105.
[0053] In an embodiment, the system 100 may include a control unit 107 that may be communicatively coupled with the image capturing unit 105. The control unit 107 may include one or more processors communicatively coupled to a memory, the memory storing one or more instructions executable by the one or more processors. The control unit 107 may be configured in the computing as described above. In an example, the smart phone may act as image capturing unit 105 as well as the control unit 107, as shown in FIG 1B. In another embodiment, the control unit 107 may be different to the image capturing unit but both may be coupled to the housing. In some other embodiment, the control unit 107 may be remotely located that may be communicatively coupled with the image capturing unit 105 physically coupled with the housing. In such cases, as an example, the control unit may be implemented as a cloud server. The image capturing unit 105 may transmit a set of data packets to the control unit 107 over a network. In an example, the set of data packets may be transmitted to the control unit 107 through a WiFi or GPRS or Bluetooth or iOra or NB-IoT module. The network can be a wireless network, a wired network or a combination thereof that can be implemented as one of the different types of networks, such as Intranet, Local Area Network (LAN), Wide Area Network (WAN), Internet, and the like. Further, the network can either be a dedicated network or a shared network. The shared network can represent an association of the different types of networks that can use variety of protocols, for example, Hypertext Transfer Protocol (HTTP), Transmission Control Protocol/Internet Protocol (TCP/IP), Wireless Application Protocol (WAP), and the like. In an example, the housing may include a universal serial bus (USB) port 110 that may be connected through a USB connector 109 to the smartphone that acts as the control unit 107 as shown in FIG. 1C.
[0054] In an embodiment, the control unit 107 may be configured to receive a set of data packets associated with the captured one or more images from the image capturing unit. The control unit 107 may then extract one or more attributes from the received set of data packets. The extraction of the one or more attributes may be based on predetermined pixel coordinate values. In an exemplary embodiment, the one or more attributes may include RGB values associated with coloured segments of the captured image of the test strip. The coloured segment may be in the form of pixels. In an exemplary embodiment, the RGB values may be presented into a Hex colour code. In another embodiment, the RGB values may be normalized in an array of predetermined dimensions. In an example, the predetermined dimension may be 64x64x3.
[0055] In an embodiment, the control unit 107 may be configured to determine concentrations of one or more parameters liquid based on the extracted the one or more attributes. In particular, based on the extracted one or more attributes, the control unit 107 may identify the one or more parameters, where the identification of the one or more parameters may include identification of any one or a combination of pH, total hardness, total alkalinity, carbonate, total chlorine, free chlorine, fluoride, bromine, nitrate, sulphate, lead, iron, copper, hexavalent chromium, mercury, and so on. Upon identification of the one or more parameters, the control unit 107 may be configured to determine the concentrations of the one or more parameters by comparing the extracted one or more attributes with predetermined values stored in a database. In an example, coloured pattern of the obtained RGB values as a result of extraction, may be compared with a pre-stored learning pattern. In an exemplary embodiment, a deep neural network mechanism may be applied to the obtained RGB values to determine the concentrations of the one or more parameters based on the pre-stored database. The database consists of a large colour database and their corresponding concentrations value that were measured using sophisticated analytical instruments such as ion-exchange chromatography (IC), UV-VIS spectroscopy, atomic absorption spectrophotometer (AAS), inductively coupled plasma spectrometry (ICP-OES, ICP-MS), auto titrators, and so on. The deep neural network may be trained with a data set to provide more accurate, consistent, and reliable results. The determination of the concentration of the one or more parameters indicates the quality of liquid.
[0056] In an embodiment, the system 100 may include a ON/OFF switch 108 positioned at the upper portion 103-3 of the housing 103. The ON/OFF switch may be configured to move between an ON position in which an electrical power is supplied to the one or more electrical components such as PCB, image capturing device and so on, of the system 100 and an OFF position in which the electrical power is not supplied to any of the electrical components of the system 100.
[0057] FIGs. 2A and 2B illustrate an exemplary representation of the upper portion and lower portion of housing of the liquid quality measurement system, respectively, in accordance with embodiments of the present disclosure. FIG. 2A shows an inverted view of the upper portion 103-3 of the housing 103.
[0058] As illustrated in FIG. 2A, the system 100 may include a battery 202 configured to supply power to one or more electrical components of the system 100. The battery 202 may be configured at a side surface of the upper portion 103-3. The supply of electrical power may be controlled by the ON/OFF switch 108. The control unit 107 may include a PCB board 204 configured with a communication module at the side surface of the upper portion 103-3. The aperture 103-4 may be surrounded with a set of the LEDs 203 that may be connected through a wire 205, where the LEDs 203 may be positioned with diffusers. The set of the LEDs 203 may be connected to the PCB board 204 and the battery 202 so that the luminance of the LEDs 203 may be controlled.
[0059] In an embodiment, the housing 103 may include a test strip holder 206 that may be configured at the lower portion 103-2 of the housing, as shown in FIG. 2B. In an embodiment, the test strip 101 may be removably configured with the lower portion 103-2. In an exemplary embodiment, the test strip holder 206 may be removed from the lower portion 103-2 of the housing 103 through the slit 103-1 and then the test strip may be placed in the test strip holder. Upon placing the test strip in the test strip holder 206, the test strip holder 206 may be again fitted to the lower portion 103-2 of the housing. In an example, the test strip holder 206 may be formed with plastic. The test strip holder 206 may be inserted into the housing through an opening at the side surface of the lower portion 103-2, which forms the slit 103-1. In another embodiment, the slit 103-1 may receive the test strip and allow it to move in the test strip holder 206.
[0060] In an embodiment, the test strip holder 206 may include grooves 207 through which the test strip may be fixed in the housing. The grooves 207 may be in the form of a rectangular box as shown in FIG. 2B. On the both sides of the grooves 207, a reference standard colour chart 208 may be used to calibrate the image capturing unit 105. The reference color chart was used for calibration of the image color. When the image capturing device captures an image, the reference color chart having fixed RGB value was used a reference point to detect and correct any change in the image color of the sensing pads observed due to variation in LED light intensity or quality of image capturing device. The reference standard colour chart 208 may include reference colours 208-1 placed at alternative positions.
[0061] FIGs. 3A-3C illustrate exemplary representation of test strip of the liquid quality measurement system, in accordance with embodiments of the present disclosure. FIGs. 3A and 3B illustrate front view and side view of a segment of the test strip 101, respectively. The test strip 101 may include a plurality of sensing pads 101-1 positioned at alternative locations. The sensing pads 101-1 may be supported by support strip 301, as shown in FIGs 3A-3C. The sensing pads 101-1 may be configured as chemical sensors that may have colour sensitivity when coming in contact with liquid. FIG. 3C illustrates an example of a test strip having a mesh type structure. In such a type of structure, plastic mesh 302 may support the sensing pads positioned in the test strip 101. Each of the plurality of sensing pads 101-1 in the test strip 101 may be made of cellulose fiber. In an embodiment, each of the plurality of sensing pads 101-1 may be positioned at predefined distance from each other at alternative places in a mesh-type structure to prevent cross contamination.
[0062] FIG. 4 illustrates an exemplary representation of test strip holder 206 of the liquid quality measurement system, in accordance with embodiments of the present disclosure. The test strip holder 206 may include the slit 103- 1, the grooves 207, and reference standard colour chart 208 as described in FIG. 2B.
[0063] FIGs. 5A-5E illustrate exemplary representations of the liquid quality measuring system with a test strip cartridge storage unit, in accordance with embodiments of the present disclosure. The system 100 may include a test strip cartridge storage unit 502 configured at the bottom of the lower portion 103-2 of the housing 103. The test strip cartridge storage unit 502 may be configured to store at least one of test strips 101 and reference standard colour charts 208. The test strip cartridge unit 502 may be configured as a rectangular box whose height and width may be the same as of the lower portion as well as the upper portion. The depth of the rectangular box may be designed depending upon a number of test strips 101 and reference standard colour charts 208 to be accommodated. The test strip 101 may be arranged in the test strip cartridge storage unit 502 as shown in FIG. 5E.
[0064] FIGs. 6A-6C illustrate exemplary representations of test strip of the liquid quality measurement system, in accordance with embodiments of the present disclosure. In an embodiment, the test strip 101 may be provided with a covering 602 that may be made of plastic and other similar materials. In order to apply the test strip 101, the covering 602 may be peeled off as shown in FIGs. 6B and 6C. As a result of removing the covering 602, the test strip 101 may be obtained which may be of a mesh type structure.
[0065] FIGs. 7A-7D illustrate exemplary representations of a reference standard colour chart of the liquid quality measurement system, in accordance with embodiments of the present disclosure. In an embodiment, the reference standard colour chart 208 may be provided with a covering 702 that may be made of plastic and other similar materials. In order to separate the reference standard colour chart 208 with the covering 702, the covering 702 may be peeled off as shown in FIGs. 7B and 7C. As a result of peeling off, the reference standard colour chart 208 may be obtained which may be in the form of two columns as shown in FIG. 7D.
[0066] FIGs. 8A-8F illustrate exemplary representations of transitioning of a housing of the liquid quality measurement system from a projected position to an assembled position, in accordance with embodiments of the present disclosure. FIGs. 8A and 8B illustrate an upper portion 103-3 and a lower portion 103-2 with the dotted lines, where the dotted lines indicate a way to fold the corresponding portion to assemble the lower/upper portion. FIGs. 8C and 8D illustrate assembling of the upper portion 103-3, whereas FIGs 8E and 8F illustrate assembling of the lower portion 103-2.
[0067] FIG. 9 illustrates an exemplary representation of a flow diagram 900 of working of the liquid quality measurement system with a cloud server, in accordance with embodiments of the present disclosure. In an embodiment, a server located at a remote location may be part of the control unit 107. The image capturing device may be communicatively coupled to the control unit, which includes a remotely operated server e.g., cloud server to receive/ transmit the data. In an exemplary embodiment, the control unit may be implemented as a combination of computing devices such as smartphone and cloud server, which may be understood with the flow diagram as illustrated in FIG. 9. At step 902, an image of the test strip may be captured after dipping in a sample of liquid. At step 904, an image of a reference standard colour chart may be captured. Then, RGB values are extracted on a computing device at step 906. At step 908, the data may be obtained, which includes, by way of example but not limited to, RGB numerical values, GPS location, time instance, type of sample, and type of liquid when test strip is dipped into the sample. At 910, the data may be transferred to the cloud server through a communication protocol and communication module such as Wifi and GPRS. Then, at 912, the RGB values of the reference standard colour chart may be evaluated using artificial neural networks or machine learning at the cloud server. At step 914, based on the RGB values of the test strip and the reference standard colour chart, one or more parameters and corresponding concentrations may be determined which are associated with the quality of the liquid. At 916, one or more advisories may be predicted based on the liquid quality. The quality of liquid as well as the one or more advisories may be transmitted to either the smart phone or registered computing device at step 918. At step 920, the quality of liquid as well as the one or more advisories may be presented on the smart phone or the registered computing device.
[0068] FIG. 10 illustrates an exemplary representation of a flow diagram 1000 representing a sequence for operating of the liquid quality measurement system, in accordance with embodiments of the present disclosure. At step 1002, a sample of predetermined amount may be taken in a plastic tube using disposable syringe and syringe filter that may be of 0.45 micron. Then, the test strip may be dipped into the sample at step 1004. In an embodiment, the test strip may be taken from the test strip cartridge storage unit and peeled off to obtain mesh type structure of the test strip. At step 1006, the test strip is removed and excess liquid is absorbed on the test strip using blotting paper. The test strip may be placed in the test strip holder as per the step 1008. In an embodiment, the test strip may be placed after lifting the upper portion. The smart phone may be connected to the USB port or at the aperture of the upper portion of the housing. The test strip holder may be inserted into the housing at step 1010. The image of the test strip and reference standard colour chart may be captured using a smartphone at step 1012. After waiting for a predetermined time such as 2 minutes (step 1014), the quality of liquid may be presented on the mobile phone at step 1016. At step 1018, one or more advisories may be presented on the mobile phone.
[0069] Thus, the present disclosure provides a simple and cost-effective liquid water quality measuring system particularly water quality measuring mechanism based on colorimetric test strips. The proposed system is capable of measuring multiple water quality parameters within a minimal time. Further with the reference standard colour chart, the image capturing device can be calibrated automatically. The proposed system therefore enables single-shot analysis of multi-parameter in a cost-effective, easy to operate, eco-friendly manner, and has a centralized data management scheme. The proposed system therefore deals with field-level to household-level water contamination problems.
[0070] While embodiments of the present invention have been illustrated and described, it will be clear that the invention is not limited to these embodiments only. Numerous modifications, changes, variations, substitutions, and equivalents will be apparent to those skilled in the art, without departing from the spirit and scope of the invention, as described in the claim.
[0071] In the foregoing description, numerous details are set forth. It will be apparent, however, to one of ordinary skill in the art having the benefit of this disclosure, that the present disclosure can be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form, rather than in detail, to avoid obscuring the present invention.
[0072] While the foregoing describes various embodiments of the disclosure, other and further embodiments of the disclosure may be devised without departing from the basic scope thereof. The disclosure is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the disclosure when combined.

ADVANTAGES OF THE INVENTION
[0073] The present disclosure provides an improved liquid quality measurement system that is capable to measure multiple parameters associated with liquid quality.
[0074] The present disclosure provides an improved liquid quality measurement system that can be automatically self-calibrated using a standard colour reference chart to reduce bias from variations in ambient lighting.
[0075] The present disclosure provides an improved liquid quality measurement system that is cost-effective and easy to implement.
[0076] The present disclosure provides an improved liquid quality measurement system with a collapsible box that can be folded easily, thereby making the system portable.