High-precision measurement optical water quality sensor and water quality measurement method

Abstract

The invention discloses a high-precision measurement optical water quality sensor and a water quality measurement method. The optical water quality sensor comprises a shell, a measurement pipeline, an optical assembly and a telescopic piece, the measuring pipeline is arranged in the shell, and the measuring pipeline is provided with a light-transmitting part; the optical assembly is arranged in the shell; the telescopic part is movably inserted into the measuring pipeline, a first cabin and a second cabin which are independent of each other are arranged between the telescopic part and the measuring pipeline, cleaning liquid is stored in the first cabin in a sealed mode, and the second cabin is communicated with the external environment. When the telescopic piece drives the first cabin body to move to the position of the light-transmitting part, the cleaning liquid in the first cabin body can clean the inner wall of the light-transmitting part, attachments on the inner wall of the light-transmitting part can be cleaned and removed in time under the conditions that the structure and the material of the measuring pipeline are not changed and the sensor is not disassembled, the water ecology is not affected, and the measurement accuracy is improved. The structure of the sensor is not damaged, the measurement precision of the sensor is improved, and the maintenance period of the sensor is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of water quality monitoring, and particularly to an optical water quality sensor with high-precision measurement and a water quality measurement method. Background Art

[0002] Optical water quality sensors can be used to measure water quality parameters such as nutrients and chlorophyll, and have a wide range of applications in fields such as water supply, reclaimed water, drainage, sewage, rivers, lakes, and oceans. In the prior art, when an optical water quality sensor is used underwater, the water environment erosion, biological attachment, and impurity attachment seriously affect the performance of the sensor. The maintenance and cleaning of the sensor require a large amount of manpower, material resources, and financial resources. In related technologies, anti-attachment coatings, materials, and ultraviolet light technologies can be used to reduce biological attachment and impurity attachment, but there are also potential risks of affecting the water ecosystem, which affects the measurement accuracy. In addition, it is difficult to be compatible between the processing technology of the sensor probe and the anti-erosion and anti-attachment coatings and materials. Therefore, the application of anti-erosion and anti-attachment is greatly limited. In addition, water flow flushing or direct physical wiping with a brush can also be used to remove the attachments, but this method is not only inconvenient to operate but also easily damages the sensor probe. Therefore, the optical water quality sensors in the prior art do not have satisfactory effects of anti-attachment, improving measurement accuracy, and extending the maintenance cycle. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide an optical water quality sensor with high-precision measurement, which can timely clean the attachments on the inner wall of the light-transmitting part without changing the structure and material of the measurement pipeline and without disassembling the sensor, improve the measurement accuracy of the sensor, and extend the maintenance cycle of the sensor.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows: An optical water quality sensor with high-precision measurement, comprising a housing, a measurement pipeline, an optical component, and a telescopic member; the measurement pipeline is arranged in the housing, and the measurement pipeline has a light-transmitting part; the optical component is arranged in the housing; the telescopic member is movably inserted into the measurement pipeline, and there are mutually independent first and second chambers between the telescopic member and the measurement pipeline. The first chamber is hermetically stored with a cleaning liquid, and the second chamber communicates with the external environment; when the telescopic member drives the first chamber to move to the position of the light-transmitting part, the cleaning liquid in the first chamber can clean the inner wall of the light-transmitting part, and when the telescopic member drives the second chamber to move to the position of the light-transmitting part, the optical component can measure the liquid parameters of the liquid to be measured in the second chamber through the light-transmitting part.

[0005] Compared with the prior art, the beneficial effects of the present invention are as follows: The optical water quality sensor drives the first cabin and the second cabin to reciprocate along the measurement pipeline through the telescopic member. During each measurement, the inner wall of the light-transmitting part can be cleaned by the cleaning liquid in the first cabin, and the biological substances, impurities and other attachments on the inner wall of the light-transmitting part can be washed away in time. When the second cabin moves to the position of the light-transmitting part, since the attachments on the inner wall of the light-transmitting part have been cleaned off, the light-transmitting assembly can accurately measure the liquid to be measured in the second cabin through the light-transmitting part and output an accurate reading. Therefore, the optical water quality sensor can flexibly and periodically clean the inner wall of the light-transmitting part with the cleaning liquid without changing the structure and material of the measurement pipeline and without disassembling the sensor, which will neither affect the water ecosystem nor damage the sensor structure, and can also timely remove the attachments on the inner wall of the light-transmitting part, improve the measurement accuracy of the sensor and extend the maintenance period of the sensor.

[0006] For the above-mentioned optical water quality sensor with high-precision measurement, there is also a calibration cabin between the telescopic member and the measurement pipeline. The calibration cabin is located between the first cabin and the second cabin, and calibration liquid is sealed and stored in the calibration cabin. When the calibration cabin moves to the position of the light-transmitting part, the optical assembly can measure the liquid parameters of the calibration liquid in the calibration cabin through the light-transmitting part.

[0007] For the above-mentioned optical water quality sensor with high-precision measurement, the calibration cabin includes an independent third cabin and fourth cabin. Calibration liquid is sealed and stored in both the third cabin and the fourth cabin. The first cabin, the third cabin, the fourth cabin and the second cabin are distributed in sequence along the telescopic movement direction of the telescopic member.

[0008] For the above-mentioned optical water quality sensor with high-precision measurement, the outer wall of the telescopic member and the inner wall of the measurement pipeline are mutually abutted through a sealing structure.

[0009] For the above-mentioned optical water quality sensor with high-precision measurement, it further includes a driving member, which is installed in the outer shell and is used to drive the telescopic member to telescopically move along the measurement pipeline.

[0010] For the above-mentioned optical water quality sensor with high-precision measurement, it further includes a transmission assembly, which connects the driving member and the telescopic member, and the transmission assembly can drive the telescopic member to telescopically move along the measurement pipeline under the drive of the driving member.

[0011] The above-mentioned optical water quality sensor for high-precision measurement, wherein the transmission assembly includes a gear set and a lead screw. The gear set connects the driving member and the lead screw. A moving plate is movably connected to the lead screw, and the inner end of the telescopic member is fixedly connected to the moving plate. The gear set can drive the lead screw to rotate under the drive of the driving member. When the lead screw rotates, it can drive the moving plate to move axially, thereby driving the telescopic member to telescopically move along the measurement pipeline.

[0012] The above-mentioned optical water quality sensor for high-precision measurement, wherein the housing includes a shell body, a front cover and a rear cover, and the front cover and the rear cover are respectively hermetically covered at the front end and the rear end of the shell body.

[0013] The present invention also provides a water quality measurement method for high-precision measurement, which uses the above-mentioned optical water quality sensor for high-precision measurement, and includes the following steps:

[0014] Step S100: Align the first chamber with the light-transmitting part, and use the cleaning liquid in the first chamber to clean the inner wall of the light-transmitting part.

[0015] Step S200: Move the telescopic member inward along the measurement pipeline until the second chamber is aligned with the light-transmitting part, and use the optical component to measure the liquid parameters of the liquid to be measured in the second chamber through the light-transmitting part.

[0016] Step S300: Move the telescopic member outward along the measurement pipeline until the first chamber is aligned with the light-transmitting part again, and use the cleaning liquid in the first chamber to clean the inner wall of the light-transmitting part again for the next measurement.

[0017] During each measurement of this measurement method, the inner wall of the light-transmitting part can be cleaned with the cleaning liquid in the first chamber, and the biological substances, impurities and other attachments on the inner wall of the light-transmitting part can be washed away in time. Without changing the structure and material of the measurement pipeline and without disassembling the sensor, the inner wall of the light-transmitting part can be flexibly and periodically cleaned with the cleaning liquid, which will neither affect the water ecology nor damage the sensor structure, and can also timely remove the attachments on the inner wall of the light-transmitting part, improve the measurement accuracy of the sensor, and extend the maintenance cycle of the sensor.

[0018] The present invention also provides a water quality measurement method for high-precision measurement, which uses the above-mentioned optical water quality sensor for high-precision measurement, and includes the following steps:

[0019] Step S100: Align the first chamber with the light-transmitting part, and use the cleaning liquid in the first chamber to clean the inner wall of the light-transmitting part.

[0020] Step S200: Move the telescopic member inward along the measurement pipeline until the calibration cabin is aligned with the light-transmitting part. Use the optical component to measure the liquid parameters of the calibration liquid in the calibration cabin through the light-transmitting part, and calibrate the sensor using the measurement result.

[0021] Step S300: Continue to move the telescopic member inward along the measurement pipeline until the second cabin is aligned with the light-transmitting part. Use the optical component to measure the liquid parameters of the liquid to be measured in the second cabin through the light-transmitting part.

[0022] Step S400: Move the telescopic member outward along the measurement pipeline until the first cabin is aligned with the light-transmitting part again. Use the cleaning liquid in the first cabin to clean the inner wall of the light-transmitting part again for the next measurement.

[0023] In each measurement of this measurement method, the inner wall of the light-transmitting part can be cleaned with the cleaning liquid in the first cabin in time to wash away the biological substances, impurities and other attachments on the inner wall of the light-transmitting part. At the same time, the sensor can be calibrated using the calibration cabin, and periodic cleaning, calibration and measurement can be realized, improving the measurement accuracy of the sensor and extending the maintenance cycle of the sensor.

[0024] For the above water quality measurement method with high-precision measurement, step S200 includes the following steps:

[0025] Step S210: Move the telescopic member inward along the measurement pipeline until the third cabin is aligned with the light-transmitting part. Use the optical component to measure the liquid parameters of the calibration liquid in the third cabin through the light-transmitting part.

[0026] Step S220: Continue to move the telescopic member inward along the measurement pipeline until the fourth cabin is aligned with the light-transmitting part. Use the optical component to measure the liquid parameters of the calibration liquid in the fourth cabin through the light-transmitting part.

[0027] Step S230: Use the measurement results in step S210 and step S220 to determine the correspondence between the sensor reading and the required liquid parameters.

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Description of the Drawings

[0029] Figure 1 It is a schematic structural diagram of the optical water quality sensor according to the embodiment of the present invention in the first state;

[0030] Figure 2 It is a schematic structural diagram of the optical water quality sensor according to the embodiment of the present invention in the second state;

[0031] Figure 3 It is a schematic structural diagram of the optical water quality sensor according to the embodiment of the present invention in the third state;

[0032] Figure 4 This is a schematic structural diagram of the optical water quality sensor according to the embodiment of the present invention in the fourth state.

[0033] Explanation of the reference numerals in the drawings: 100 housing, 110 housing body, 120 front cover, 130 rear cover, 140 watertight interface, 150 light-blocking member, 151 light-transmitting hole, 160 fixing plate, 170 moving plate, 180 support plate, 190 slide rail, 200 measurement pipeline, 210 light-transmitting part, 300 optical component, 400 telescopic member, 410 opening, 500 first cabin, 600 second cabin, 700 calibration cabin, 710 third cabin, 720 fourth cabin, 800 driving member, 900 transmission component, 910 gear set, 920 lead screw. Detailed implementation manners

[0034] The embodiments of the present invention will be described in detail below:

[0035] Embodiment 1

[0036] Referring to Figures 1 to 4 , Embodiment 1 of the present invention provides an optical water quality sensor with high-precision measurement, including a housing 100, a measurement pipeline 200, an optical component 300, and a telescopic member 400.

[0037] The housing 100 includes a housing body 110, a front cover 120, and a rear cover 130. The front cover 120 and the rear cover 130 are respectively hermetically covered at the front end and the rear end of the housing body 110, so that the housing body 110, the front cover 120, and the rear cover 130 enclose a watertight accommodation cavity, facilitating the accommodation and installation of structures such as the measurement pipeline 200 and the optical component 300, and protecting the internal components to prevent adverse effects of the external environment on the sensor. The rear cover 130 is provided with a watertight interface 140 to achieve electrical connection and signal transmission while ensuring the sealing performance.

[0038] The measurement pipeline 200 and the optical component 300 are both arranged inside the housing 100. One end of the measurement pipeline 200 close to the front cover 120 has an opening 410. The measurement pipeline 200 also has a light-transmitting part 210 to facilitate the beam of the optical component 300 to pass through. It should be noted that when it is said that the measurement pipeline 200 has a light-transmitting part 210 in this application, it means that there is a position on the measurement pipeline 200 through which the beam of the optical component 300 can pass. For the area that cannot be penetrated by the beam, it can be set on the structure of the measurement pipeline 200 itself and realized by some special materials, or other light-blocking structures can be adopted inside the housing 100. Therefore, it can be understood that the measurement pipeline 200 itself can be partially light-transmitting or entirely light-transmitting. For example, in some embodiments, the measurement pipeline 200 is an entirely light-transmitting pipeline, a light-blocking member 150 is installed inside the housing 100, a light-transmitting hole 151 is opened on the light-blocking member 150, the measurement pipeline 200 is arranged inside the light-blocking member 150, and the area of the measurement pipeline 200 located inside the light-transmitting hole 151 can be regarded as the light-transmitting part 210 of the measurement pipeline 200, and the optical component 300 is arranged outside the light-transmitting hole 151. During measurement, the beam emitted by the optical component 300 can enter through the light-transmitting hole 151 and irradiate into the measurement pipeline 200. The structure and working principle of the optical component 300 can refer to existing optical water quality sensors and will not be elaborated here.

[0039] Continue to refer to Figure 1 , the telescopic member 400 is a plunger structure that is movably inserted into the measurement pipeline 200. The shape and size of the telescopic member 400 match the shape and size of the measurement pipeline 200. The cross-sectional profile of the telescopic member 400 can be square, circular, oval, etc., preferably circular, but it needs to match the cross-sectional profile of the measurement pipeline 200. There are mutually independent first chambers 500 and second chambers 600 between the telescopic member 400 and the measurement pipeline 200. Cleaning liquid, such as alcohol solution or some washing solutions, etc., is hermetically stored in the first chamber 500, which can effectively remove attachments such as organisms and impurities on the inner wall of the measurement pipeline 200 and will not damage the sensor structure and the water ecosystem. The number of the first chambers 500 can be set to one or more, and can be set according to water quality conditions, measurement time, cleaning requirements, etc. For example, in the case of poor water quality and long measurement time, multiple first chambers 500 can be set, and the measurement accuracy can be improved by measuring after multiple cleanings.

[0040] The second cabin 600 is connected to the outside environment through the opening 410 at the outer end of the telescopic member 400. The liquid to be tested in the outside environment can enter the second cabin 600 from the opening 410. When the second cabin 600 moves along the measuring pipe 200, it can carry the liquid to be tested to the position of the light-transmitting portion 210 of the measuring pipe 200, so that the optical component 300 can measure the liquid to be tested in the second cabin 600 through the light-transmitting portion 210. The outer wall of the telescopic member 400 and the inner wall of the measuring pipe 200 are abutted against each other through a sealing structure. The sealing structure can be an independent sealing ring or a buffer layer wrapped around the outer wall of the telescopic member 400, so as to better achieve the circumferential sealing of the first cabin 500 and the second cabin 600.

[0041] Reference Figure 1 In the initial state, the position of the first chamber 500 corresponds to the position of the light-transmitting portion 210. At this time, the cleaning liquid in the first chamber 500 can clean the attachments on the inner wall of the light-transmitting portion 210. Of course, it can be understood that during the telescopic movement of the telescopic member 400, the cleaning liquid in the first chamber 500 can also clean the attachments on the inner wall of other parts of the measuring pipe 200, not just the attachments on the inner wall of the light-transmitting portion 210. Figure 4 When the sensor is working, the telescopic member 400 first moves inward until the position of the second chamber 600 corresponds to the position of the light-transmitting portion 210. At this time, the light beam of the optical component 300 can penetrate the light-transmitting portion 210 and irradiate into the second chamber 600 to measure the liquid to be measured in the second chamber 600. After measuring the output reading, the telescopic member 400 moves outward to restore the initial position. At this time, the position of the first chamber 500 corresponds to the position of the light-transmitting portion 210 again, and the cleaning liquid in the first chamber 500 cleans the inner wall of the light-transmitting portion 210 again.

[0042] Therefore, the optical water quality sensor drives the first cabin 500 and the second cabin 600 to reciprocate along the measurement pipeline 200 through the telescopic member 400. During each measurement, the inner wall of the light-transmitting part 210 can be cleaned with the cleaning liquid in the first cabin 500, and the biological substances, impurities and other attachments on the inner wall of the light-transmitting part 210 can be washed away in time. When the second cabin 600 moves to the position of the light-transmitting part 210, since the attachments on the inner wall of the light-transmitting part 210 have been cleaned off, the light-transmitting assembly can accurately measure the liquid to be measured in the second cabin 600 through the light-transmitting part 210 and output accurate readings. Therefore, the optical water quality sensor can flexibly and periodically clean the inner wall of the light-transmitting part 210 with the cleaning liquid without changing the structure and material of the measurement pipeline 200 and without disassembling the sensor. It will neither affect the water ecology nor damage the sensor structure, and can also timely clean the attachments on the inner wall of the light-transmitting part 210, improving the measurement accuracy of the sensor and extending the maintenance period of the sensor. In addition, during the movement of the telescopic member 400, the cleaning liquid in the first cabin 500 also moves along, with a certain scouring force, but the scouring force is not too large, which can improve the cleaning effect while avoiding damage to the inner wall of the measurement pipeline 200.

[0043] Furthermore, for the telescopic movement of the telescopic member 400, structures such as cylinders, electric push rods, and push rod motors can be used to drive it. Here, a driving method is provided: the optical water quality sensor further includes a driving member 800 and a transmission assembly 900. The driving member 800 is a motor installed in the housing 100. For example, a fixing plate 160 can be installed in the housing 100, and the motor is fixedly installed on the fixing plate 160. The transmission assembly 900 uses a gear set 910 and a lead screw 920 in cooperation. The gear set 910 connects the motor and the lead screw 920. A moving plate 170 is movably connected to the lead screw 920, and the inner end of the telescopic member 400 is fixedly connected to the moving plate 170. A support plate 180 is also fixedly installed in the housing 100, and the two ends of the lead screw 920 are respectively rotatably connected to the fixing plate 160 and the support plate 180. A slide rail 190 is also installed between the fixing plate 160 and the support plate 180, and the moving plate 170 is movably connected to the slide rail 190. When it is necessary to drive the telescopic member 400 to move, the gear set 910 can drive the lead screw 920 to rotate under the drive of the driving member 800. When the lead screw 920 rotates, it can drive the moving plate 170 to move axially, and then drive the telescopic member 400 to telescopically move along the measurement pipeline 200.

[0044] Embodiment 2

[0045] Refer to Figures 1 to 4 This embodiment 2 of the present invention provides an optical water quality sensor for high-precision measurement, including a housing 100, a measurement pipeline 200, an optical assembly 300, and a telescopic member 400.

[0046] The housing 100 includes a housing body 110, a front cover 120 and a rear cover 130. The front cover 120 and the rear cover 130 are respectively hermetically closed at the front end and the rear end of the housing body 110, so that the housing body 110, the front cover 120 and the rear cover 130 enclose a water-sealed accommodation cavity, which is convenient for accommodating and installing structures such as the measurement pipeline 200 and the optical component 300, and protecting the internal components to prevent the external environment from having an adverse impact on the sensor. The rear cover 130 is provided with a watertight interface 140 to achieve electrical connection and signal transmission while ensuring the sealing performance.

[0047] Both the measurement pipeline 200 and the optical component 300 are arranged inside the housing 100. One end of the measurement pipeline 200 close to the front cover 120 has an opening 410, and the measurement pipeline 200 also has a light-transmitting part 210 to facilitate the light beam of the optical component 300 to pass through.

[0048] Continue to refer to Figure 1 , the telescopic member 400 is a plunger structure that is movably inserted into the measurement pipeline 200. The shape and size of the telescopic member 400 match the shape and size of the measurement pipeline 200. The cross-sectional profile of the telescopic member 400 can be square, circular or oval, etc., preferably circular, but it needs to match the cross-sectional profile of the measurement pipeline 200. There are independent first chambers 500 and second chambers 600 between the telescopic member 400 and the measurement pipeline 200. The first chamber 500 is hermetically stored with a cleaning liquid, such as an alcohol solution or some washing solutions, etc., which can effectively remove the biological, impurities and other attachments on the inner wall of the measurement pipeline 200, and will not damage the sensor structure and the water ecosystem. The number of the first chambers 500 can be set to one or more, and can be set according to water quality conditions, measurement time and cleaning requirements, etc. For example, in the case of poor water quality and long measurement time, multiple first chambers 500 can be set, and the measurement accuracy can be improved by measuring after multiple cleanings.

[0049] The second chamber 600 communicates with the external environment through the opening 410 at the outer end of the telescopic member 400, so that the liquid to be measured in the external environment can enter the second chamber 600 from the opening 410. When the second chamber 600 moves along the measurement pipeline 200, it can carry the liquid to be measured to the position of the light-transmitting part 210 of the measurement pipeline 200, so that the optical component 300 can measure the liquid to be measured in the second chamber 600 through the light-transmitting part 210. The outer wall of the telescopic member 400 and the inner wall of the measurement pipeline 200 are in mutual contact through a sealing structure. The sealing structure can be an independent sealing ring or a buffer layer wrapped on the outer wall of the telescopic member 400 to better achieve the circumferential sealing of the first chamber 500 and the second chamber 600.

[0050] The calibration chamber 700 is sealed to store calibration liquid. When the calibration chamber 700 moves to the position of the light-transmitting portion 210, the optical assembly 300 can measure the liquid parameters of the calibration liquid in the calibration chamber 700 through the light-transmitting portion 210. The number of calibration chambers 700, as well as the type and concentration of the calibration liquid, can be configured according to the liquid parameters to be measured.

[0051] Reference Figure 1 In the initial state, the position of the first chamber 500 corresponds to the position of the light-transmitting portion 210, and the cleaning liquid in the first chamber 500 can clean the attached objects on the inner wall of the light-transmitting portion 210. Figure 2 and Figure 3 During measurement, the telescopic member 400 moves inward until the position of the calibration chamber 700 corresponds to the position of the light-transmitting portion 210. At this time, the light beam of the optical component 300 can penetrate the light-transmitting portion 210 and irradiate into the calibration chamber 700, measure the calibration liquid in the calibration chamber 700, and calibrate the sensor according to the measurement result. Figure 4 , the telescopic member 400 continues to move inward until the position of the second chamber 600 corresponds to the position of the light-transmitting portion 210. At this time, the light beam of the optical component 300 can penetrate the light-transmitting portion 210 and irradiate into the second chamber 600 to measure the liquid to be measured in the second chamber 600. After measuring the output reading, the telescopic member 400 moves outward to restore the initial position. At this time, the position of the first chamber 500 corresponds to the position of the light-transmitting portion 210 again, and the cleaning liquid in the first chamber 500 cleans the inner wall of the light-transmitting portion 210 again.

[0052] Therefore, the optical water quality sensor drives the first cabin 500, the calibration cabin 700, and the second cabin 600 to reciprocate along the measurement pipeline 200 through the telescopic member 400. During each measurement, the inner wall of the light-transmitting portion 210 can be cleaned with the cleaning liquid in the first cabin 500, and the biological substances, impurities, and other attachments on the inner wall of the light-transmitting portion 210 can be washed away in time. The sensor is calibrated with the calibration liquid in the calibration cabin 700 to ensure the accuracy of subsequent measurement results. When the second cabin 600 moves to the position of the light-transmitting portion 210, since the attachments on the inner wall of the light-transmitting portion 210 have been cleaned off and the sensor has been calibrated, the light-transmitting assembly can accurately measure the liquid to be measured in the second cabin 600 through the light-transmitting portion 210 and output accurate readings. Therefore, the optical water quality sensor can flexibly and periodically clean the inner wall of the light-transmitting portion 210 with the cleaning liquid without changing the structure and material of the measurement pipeline 200 and without disassembling the sensor, which neither affects the water ecology nor damages the sensor structure, and can also timely remove the attachments on the inner wall of the light-transmitting portion 210. At the same time, after being cleaned with the cleaning liquid, the sensor is calibrated with the calibration liquid and then measured, which improves the measurement accuracy of the sensor and extends the maintenance cycle of the sensor. In addition, during the movement of the telescopic member 400, the cleaning liquid in the first cabin 500 also moves along, with a certain scouring force, but the scouring force is not too large, which can improve the cleaning effect while avoiding damage to the inner wall of the measurement pipeline 200. Therefore, the design of the optical water quality sensor can simultaneously achieve in-situ cleaning, calibration, and measurement, improve the measurement accuracy, and effectively extend the maintenance and calibration cycles of the optical water quality sensor.

[0053] Furthermore, in this embodiment, the entire measurement pipeline 200 is a light-transmitting pipeline. A light-blocking member 150 is installed in the housing 100. A light-transmitting hole 151 is formed in the light-blocking member 150. The measurement pipeline 200 is arranged inside the light-blocking member 150. The area of the measurement pipeline 200 located inside the light-transmitting hole 151 can be regarded as the light-transmitting portion 210 of the measurement pipeline 200. The optical assembly 300 is arranged outside the light-transmitting hole 151. During measurement, the light beam emitted by the optical assembly 300 can enter through the light-transmitting hole 151 and irradiate into the measurement pipeline 200. The light-blocking member 150 can block other parts of the measurement pipeline 200 and reduce the interference of other parts on the measurement. At the same time, when the calibration cabin 700 does not move to the position of the light-transmitting portion 210, the light beam of the optical assembly 300 cannot irradiate into the calibration liquid in the calibration cabin 700. Through the light-shielding design, the quality of the calibration liquid can be guaranteed, the effective period of the calibration liquid can be effectively extended, and further the maintenance and calibration cycles of the optical water quality sensor can be extended.

[0054] Embodiment 3

[0055] Refer toFigures 1 to 4 Embodiment 3 of the present invention provides an optical water quality sensor for high-precision measurement, which is a further solution of the optical water quality sensor in Embodiment 2. Among them, there are relatively independent first cabin 500, second cabin 600, third cabin 710 and fourth cabin 720 between the telescopic member 400 and the measuring pipe 200. Further, the first cabin 500, the second cabin 600, the third cabin 710 and the fourth cabin 720 can be grooves extending along the circumference of the telescopic member 400 and recessed inward along the radial direction of the telescopic member 400. The outer wall of the telescopic member 400 is sealed and fitted with the inner wall of the measuring pipe 200, and the first cabin 500, the third cabin 710 and the fourth cabin 720 are enclosed to form a sealed cabin, so that when the telescopic member 400 moves, the liquid in the sealed cabin can move with it and will not leak from the peripheral side. Of course, in some other embodiments, the third cabin 710 and the fourth cabin 720 can also be sealed cabins enclosed by the telescopic member 400 alone. Specifically, the first chamber 500 is located at the inner end, and the cleaning liquid is sealed and stored therein; the second chamber 600 is located at the outer end, and the second chamber 600 is communicated with the external environment and is used to contain the liquid to be tested; the third chamber 710 and the fourth chamber 720 are located between the first chamber 500 and the second chamber 600, and serve as calibration chambers 700. Figures 1 to 4 As shown, the first cabin 500, the third cabin 710, the fourth cabin 720 and the second cabin 600 are sequentially distributed along the telescopic movement direction of the telescopic member 400. The third cabin 710 and the fourth cabin 720 are both sealed and stored with calibration liquids. The concentrations of the liquid parameters to be measured in the two calibration liquids are different. Therefore, when the third cabin 710 and the fourth cabin 720 are sequentially moved to the position of the light-transmitting portion 210, the sensor can measure different readings. Through two-point calibration, the relationship between the sensor reading and the corresponding liquid parameter concentration can be determined.

[0056] Reference Figure 1 In the initial state, the position of the first chamber 500 corresponds to the position of the light-transmitting portion 210, and the cleaning liquid in the first chamber 500 can clean the attached objects on the inner wall of the light-transmitting portion 210. Figure 2 During measurement, the telescopic member 400 moves inward until the third chamber 710 moves to the position of the light-transmitting portion 210. At this time, the optical component 300 can measure the liquid parameters of the calibration liquid in the third chamber 710 through the light-transmitting portion 210 to obtain a measurement reading. Figure 3, the telescopic member 400 continues to move inward until the fourth cabin 720 moves to the position of the light-transmitting part 210. At this time, the optical component 300 can measure the liquid parameters of the calibration liquid in the fourth cabin 720 through the light-transmitting part 210, and obtain another measurement reading. Using the two measurement readings, through two-point calibration, the relationship between the sensor reading and the concentration of the corresponding liquid parameter can be determined, and the sensor can be calibrated. After that, referring to Figure 4 , the telescopic member 400 continues to move inward until the position of the second cabin 600 corresponds to the position of the light-transmitting part 210. At this time, the light beam of the optical component 300 can pass through the light-transmitting part 210 and irradiate into the second cabin 600 to measure the liquid to be measured in the second cabin 600. After measuring the output reading, the telescopic member 400 moves outward to restore the initial position. At this time, the position of the first cabin 500 corresponds to the position of the light-transmitting part 210 again, and the cleaning liquid in the first cabin 500 cleans the inner wall of the light-transmitting part 210 again.

[0057] Embodiment 4

[0058] Embodiment 4 of the present invention provides a water quality measurement method with high-precision measurement, which uses the above-mentioned optical water quality sensor with high-precision measurement for measurement, and includes the following steps:

[0059] Step S100: Align the first cabin 500 with the light-transmitting part 210, and use the cleaning liquid in the first cabin 500 to clean the inner wall of the light-transmitting part 210;

[0060] Step S200: Make the telescopic member 400 move inward along the measurement pipeline 200 until the second cabin 600 is aligned with the light-transmitting part 210, and use the optical component 300 to measure the liquid parameters of the liquid to be measured in the second cabin 600 through the light-transmitting part 210;

[0061] Step S300: Make the telescopic member 400 move outward along the measurement pipeline 200 until the first cabin 500 is aligned with the light-transmitting part 210 again, and use the cleaning liquid in the first cabin 500 to clean the inner wall of the light-transmitting part 210 again for the next measurement.

[0062] In each measurement of this measurement method, the cleaning liquid in the first cabin 500 can be used to clean the inner wall of the light-transmitting part 210 in time, and the biological substances, impurities and other attachments on the inner wall of the light-transmitting part 210 can be washed away in time. Without changing the structure and material of the measurement pipeline 200 and without disassembling the sensor, the inner wall of the light-transmitting part 210 can be cleaned flexibly and periodically by using the cleaning liquid, which will neither affect the water ecology nor damage the sensor structure, and can also clean the attachments on the inner wall of the light-transmitting part 210 in time, improving the measurement accuracy of the sensor and extending the maintenance cycle of the sensor.

[0063] Example 5

[0064] Example 5 of the present invention provides a water quality measurement method with high-precision measurement, which uses the above-mentioned optical water quality sensor with high-precision measurement for measurement, and includes the following steps:

[0065] Step S100: Align the first cabin 500 with the light-transmitting part 210, and use the cleaning liquid in the first cabin 500 to clean the inner wall of the light-transmitting part 210;

[0066] Step S200: Move the telescopic member 400 inward along the measurement pipeline 200 until the calibration cabin 700 is aligned with the light-transmitting part 210, use the optical component 300 to measure the liquid parameters of the calibration liquid in the calibration cabin 700 through the light-transmitting part 210, and calibrate the sensor using the measurement result;

[0067] Step S300: Continue to move the telescopic member 400 inward along the measurement pipeline 200 until the second cabin 600 is aligned with the light-transmitting part 210, and use the optical component 300 to measure the liquid parameters of the liquid to be measured in the second cabin 600 through the light-transmitting part 210;

[0068] Step S400: Move the telescopic member 400 outward along the measurement pipeline 200 until the first cabin 500 is aligned with the light-transmitting part 210 again, and use the cleaning liquid in the first cabin 500 to clean the inner wall of the light-transmitting part 210 again for the next measurement.

[0069] In each measurement of this measurement method, the inner wall of the light-transmitting part 210 can be cleaned with the cleaning liquid in the first cabin 500 in time to wash away the biological, impurity and other attachments on the inner wall of the light-transmitting part 210. At the same time, the sensor can be calibrated using the calibration cabin 700, and periodic cleaning, calibration and measurement can be realized, improving the measurement accuracy of the sensor and extending the maintenance period of the sensor.

[0070] Example 6

[0071] Example 6 of the present invention provides a water quality measurement method with high-precision measurement, which uses the above-mentioned optical water quality sensor with high-precision measurement for measurement, and includes the following steps:

[0072] Step S100: Refer to Figure 1 , align the first cabin 500 with the light-transmitting part 210, and use the cleaning liquid in the first cabin 500 to clean the inner wall of the light-transmitting part 210;

[0073] Step S210: Refer to Figure 2, move the telescopic member 400 inward along the measurement pipeline 200 until the third cabin 710 is aligned with the light-transmitting part 210, and use the optical component 300 to measure the liquid parameters of the calibration liquid in the third cabin 710 through the light-transmitting part 210; taking the liquid parameter as the chlorophyll concentration as an example, the calibration liquid in the third cabin 710 is deionized water, and the corresponding chlorophyll concentration is 0 μg / L. When the optical component 300 measures the liquid parameters of the calibration liquid in the third cabin 710 through the light-transmitting part 210, the measurement reading of the sensor is X1;

[0074] Step S220, referring to Figure 3 , move the telescopic member 400 further inward along the measurement pipeline 200 until the fourth cabin 720 is aligned with the light-transmitting part 210, and use the optical component 300 to measure the liquid parameters of the calibration liquid in the fourth cabin 720 through the light-transmitting part 210; taking the liquid parameter as the chlorophyll concentration as an example, the calibration liquid in the fourth cabin 720 is rhodamine B standard solution, and the corresponding chlorophyll concentration is Y μg / L. When the optical component 300 measures the liquid parameters of the calibration liquid in the fourth cabin 720 through the light-transmitting part 210, the measurement reading of the sensor is X2;

[0075] Step S230, use the measurement results in Step S210 and Step S220 to determine the corresponding relationship between the sensor reading and the required liquid parameter, and calibrate the sensor;

[0076] Step S300, referring to Figure 4 , move the telescopic member 400 further inward along the measurement pipeline 200 until the second cabin 600 is aligned with the light-transmitting part 210, and use the optical component 300 to measure the liquid parameters of the liquid to be measured in the second cabin 600 through the light-transmitting part 210;

[0077] Step S400, move the telescopic member 400 outward along the measurement pipeline 200 until the first cabin 500 is aligned with the light-transmitting part 210 again, and use the cleaning liquid in the first cabin 500 to clean the inner wall of the light-transmitting part 210 again for the next measurement.

[0078] It should be noted that in the description of the present invention, if there is any reference to the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., it is all based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and should not be construed as a limitation to the present invention.

[0079] In the description of the present invention, "several" means one or more, "a plurality of" means two or more. Understanding "greater than", "less than", "exceeding", etc. does not include the recited number, while "above", "below", "within", etc. include the recited number. If there is a description of "first" or "second", etc., it is only for the purpose of distinguishing technical features and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features or implicitly specifying the sequence relationship of the indicated technical features.

[0080] In the description of the present invention, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. shall be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0081] The above embodiments are only the preferred embodiments of the present invention, and the scope of protection of the present invention cannot be limited thereby. Any non-substantive changes and substitutions made by those skilled in the art on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. An optical water quality sensor for high-precision measurement, characterized in that: include: Housing (100); A measuring pipe (200) is arranged in the housing (100), and the measuring pipe (200) has a light-transmitting portion (210); An optical component (300) is disposed in the housing (100); and A telescopic member (400) is movably plugged into the measuring pipe (200), and a first cabin (500) and a second cabin (600) are provided between the telescopic member (400) and the measuring pipe (200), wherein a cleaning liquid is sealed and stored in the first cabin (500), and the second cabin (600) is connected to the external environment; When the telescopic member (400) drives the first chamber (500) to move to the position of the light-transmitting portion (210), the cleaning liquid in the first chamber (500) can clean the inner wall of the light-transmitting portion (210); when the telescopic member (400) drives the second chamber (600) to move to the position of the light-transmitting portion (210), the optical component (300) can measure the liquid parameters of the liquid to be tested in the second chamber (600) through the light-transmitting portion (210).

2. The optical water quality sensor for high-precision measurement according to claim 1, characterized in that: A calibration chamber (700) is also provided between the telescopic member (400) and the measuring pipe (200). The calibration chamber (700) is located between the first chamber (500) and the second chamber (600). Calibration liquid is sealed and stored in the calibration chamber (700). When the telescopic member (400) drives the calibration chamber (700) to move to the position of the light-transmitting portion (210), the optical component (300) can measure liquid parameters of the calibration liquid in the calibration chamber (700) through the light-transmitting portion (210).

3. The optical water quality sensor for high-precision measurement according to claim 2, characterized in that: The calibration chamber (700) includes a third chamber (710) and a fourth chamber (720) which are independent of each other, and the third chamber (710) and the fourth chamber (720) both contain sealed calibration liquids. The first chamber (500), the third chamber (710), the fourth chamber (720) and the second chamber (600) are sequentially distributed along the telescopic movement direction of the telescopic member (400).

4. The optical water quality sensor for high-precision measurement according to claim 1, characterized in that: The outer wall of the telescopic member (400) and the inner wall of the measuring pipe (200) are in contact with each other via a sealing structure.

5. The optical water quality sensor for high-precision measurement according to claim 1, characterized in that: It also includes a driving member (800), which is installed in the housing (100) and is used to drive the telescopic member (400) to move telescopically along the measuring pipe (200).

6. The optical water quality sensor for high-precision measurement according to claim 5, characterized in that: The invention also comprises a transmission assembly (900), wherein the transmission assembly (900) connects the driving member (800) and the telescopic member (400), and the transmission assembly (900) can drive the telescopic member (400) to move telescopically along the measuring pipe (200) under the drive of the driving member (800).

7. The optical water quality sensor for high-precision measurement according to claim 1, characterized in that: The housing (100) comprises a shell (110), a front cover (120) and a rear cover (130), wherein the front cover (120) and the rear cover (130) are respectively sealed and covered on the front end and the rear end of the shell (110).

8. A high-precision water quality measurement method, characterized in that: The method of using the high-precision optical water quality sensor as claimed in any one of claims 1 to 7 to perform measurement comprises the following steps: Step S100, aligning the first chamber (500) with the light-transmitting portion (210), and using the cleaning liquid in the first chamber (500) to clean the inner wall of the light-transmitting portion (210); Step S200, moving the telescopic member (400) inward along the measuring pipe (200) until the second chamber (600) is aligned with the light-transmitting portion (210), and measuring liquid parameters of the liquid to be measured in the second chamber (600) through the light-transmitting portion (210) using the optical component (300); Step S300, move the telescopic member (400) outward along the measuring pipe (200) until the first chamber (500) is aligned with the light-transmitting portion (210) again, and use the cleaning liquid in the first chamber (500) to clean the inner wall of the light-transmitting portion (210) again, waiting for the next measurement.

9. A high-precision water quality measurement method, characterized in that: The method of using the high-precision optical water quality sensor as claimed in any one of claims 2 to 7 to perform measurement comprises the following steps: Step S100, aligning the first chamber (500) with the light-transmitting portion (210), and using the cleaning liquid in the first chamber (500) to clean the inner wall of the light-transmitting portion (210); Step S200, moving the telescopic member (400) inward along the measuring pipe (200) until the calibration chamber (700) is aligned with the light-transmitting portion (210), measuring liquid parameters of the calibration liquid in the calibration chamber (700) through the light-transmitting portion (210) using the optical component (300), and calibrating the sensor using the measurement result; Step S300, the telescopic member (400) continues to move inward along the measuring pipe (200) until the second chamber (600) is aligned with the light-transmitting portion (210), and the liquid parameters of the liquid to be measured in the second chamber (600) are measured through the light-transmitting portion (210) by using the optical component (300); Step S400, move the telescopic member (400) outward along the measuring pipe (200) until the first chamber (500) is aligned with the light-transmitting portion (210) again, and use the cleaning liquid in the first chamber (500) to clean the inner wall of the light-transmitting portion (210) again, waiting for the next measurement.

10. The high-precision water quality measurement method according to claim 9, characterized in that: Step S200 includes the following steps: Step S210, moving the telescopic member (400) inward along the measuring pipe (200) until the third chamber (710) is aligned with the light-transmitting portion (210), and measuring liquid parameters of the calibration liquid in the third chamber (710) through the light-transmitting portion (210) using the optical component (300); Step S220, the telescopic member (400) continues to move inward along the measuring pipe (200) until the fourth chamber (720) is aligned with the light-transmitting portion (210), and the liquid parameters of the calibration liquid in the fourth chamber (720) are measured through the light-transmitting portion (210) using the optical component (300); Step S230: Determine the corresponding relationship between the sensor reading and the required liquid parameters using the measurement results in step S210 and step S220.

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