Multi-sensor detection and cleaning device and cleaning method

Abstract

The present invention discloses a multi-sensor detection and cleaning device and cleaning method. The device includes a first filter layer, a second filter layer, and a sensor placement area. The bottom of the sensor placement area is connected to the second filter layer, and one or more sensors are placed inside the cylinder of the sensor placement area. The second filter layer is connected to the first filter layer, and the bottom of the second filter layer is provided with sieve holes. The cylinder wall of the first filter layer is provided with sieve holes. A first motor and a moving block are mounted on a guide rail, and the moving block is connected to the second motor via a cantilever. The second motor's rotating shaft is fixedly mounted and passes through the middle of the bottom of the sensor placement area. A sensor electrode cleaning component is mounted on the motor rotating shaft located outside the bottom of the sensor placement area. A filter screen cleaning component is mounted on the guide rail at a position corresponding to the sieve holes of the first filter layer. The present invention can regularly complete the cleaning of the sensor electrodes and the cylinder wall of the filter layer, and the cleaning process does not affect the normal operation of the sensors. The entire device is simple, practical, and low-cost.

Description

Technical Field

[0001] The present invention belongs to the field of sensors, and in particular relates to a multi-sensor detection and cleaning device and a cleaning method. Background Art

[0002] Modern fisheries are increasingly prioritizing the development of aquaculture through green spatial patterns, focusing on the living habits and well-being of aquatic animals. Each aquatic animal requires a water quality environment that is suitable for its survival. If certain water quality indicators exceed the animal's adaptive and tolerance range, the animal will not be able to grow normally, and may even die in large numbers. By utilizing a large number of sensors to monitor water quality, including temperature, pH, dissolved oxygen, redox, salinity, ammonium ions, and sulfur ions, aquaculture technicians at the monitoring center can obtain real-time information on the aquaculture water quality environment through the monitoring system, promptly receiving abnormal alarms and water quality warnings. Based on the water quality monitoring results, they can adjust control equipment in real time, achieving scientific aquaculture and management. However, due to the high concentration of impurities in the water, algae and shellfish in the water can adhere to the sensor electrodes, resulting in inaccurate detection results. Because cleaning underwater sensor electrodes is difficult, traditional cleaning methods require removing the sensor device from the water and performing manual cleaning, which is labor-intensive and inefficient. To address the sensor electrode cleaning problem, patent CN211385999U discloses a sensor cleaning device that uses a chain-driven automatic lift mechanism to move the sensor, while simultaneously utilizing a water spray and brush system for cleaning. However, due to the use of chain drive, motor, and water pump, this device occupies a large space, has low cleaning efficiency, and is not suitable for cleaning multiple sensors simultaneously. Patent CN210497462U discloses a sensor cleaning device that utilizes an infrared receiver to control an ultrasonic transmitter for acoustic cleaning and a motor to control a spray head for water cleaning. However, its structure is complex and it fails to consider filter cleaning, resulting in low cleaning efficiency. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a multi-sensor detection and cleaning device and cleaning method with a small working space, simple structure, easy use and high cleaning efficiency. It is easy to disassemble, effectively filters impurities, and can efficiently clean multiple water quality sensor electrodes at the same time.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] A multi-sensor detection and cleaning device includes a first filter layer 11, a second filter layer 12 and a sensor placement area 13; the bottom of the sensor placement area 13 is connected to the second filter layer 12, and more than one sensor is placed inside the cylinder of the sensor placement area 13, the upper body of the sensor is installed at the bottom of the sensor placement area 13, and the probe electrode 20 of the sensor is placed inside the cylinder of the second filter layer 12; the second filter layer 12 is connected to the first filter layer 11, and the bottom of the second filter layer 12 is provided with a sieve hole; the cylinder wall of the first filter layer 11 is provided with a sieve hole for filtering impurities in water; a first motor 1 and a moving block 2 are installed on the guide rail 3, the first motor 1 is used to drive the moving block 2 so that the moving block 2 moves up and down along the guide rail; the moving block 2 is connected to the second motor 16 through a cantilever, and the rotating shaft 15 of the second motor 16 is fixedly installed and passes through the sensor In the middle of the bottom of the placement area 13, the movement of the moving block 2 drives the sensor placement area, the second filter layer and the first filter layer below the cantilever to move together; a sensor electrode cleaning component 18 is installed on the motor shaft 15 located on the bottom outside of the sensor placement area 13 (that is, located inside the cylinder of the second filter layer 12), and the soft brush in the sensor electrode cleaning component corresponds to the bottom opening position of the sensor placement area 13. The soft brush rotates under the drive of the motor to clean the probe electrode 20 of the sensor to maintain the cleanliness of the probe electrode; a filter cleaning component 4 is installed on the guide rail 3 at a position corresponding to the sieve hole of the first filter layer 11. One end of the filter cleaning component 4 is fixed to the guide rail 3 by a compression spring 5, and the other end of the filter cleaning component 4 is installed with a hard brush. The hard brush can remove impurities attached to the sieve hole of the first filter layer 11 by friction.

[0006] An upper cover 14 is installed above the sensor placement area 13. The bottom of the sensor placement area 13 is provided with a central opening and peripheral openings. The central opening is used to accommodate the rotating shaft 15 of the second motor 16. Peripheral openings are provided at the bottom of the sensor placement area 13 based on the number of sensors, and these openings are used to install the sensors. An adjustment plug 17 and a compression spring 19 are provided on the outer side of the bottom of the sensor placement area 13, corresponding to each peripheral opening. The adjustment plug 17 is used to adjust the diameter of the peripheral opening to accommodate the sensor, and the installation height of the sensor electrode is adjusted to match the height of the soft brush in the sensor electrode cleaning component 18. The compression spring 19 then secures the sensor. The sensor electrode cleaning component 18 is mounted on the rotating shaft 15 of the second motor 16. When the motor shaft 15 rotates, the sensor electrode cleaning component 18 rotates with the motor shaft 15, and the soft brush in the sensor electrode cleaning component 18 cleans the sensor probe electrode 20.

[0007] The sieve hole diameter of the first filter layer 11 can be determined according to the size of suspended impurities in the water. For example, in freshwater aquaculture, the suspended impurities that are easily attached to the device are mainly grass residues and shellfish, and their sizes are usually more than 1 cm. Therefore, the sieve hole diameter of the first filter layer 11 is set to 6-8 mm. Water flows into the cylinder of the first filter layer 11 through the sieve holes. The sieve holes can block most of the easily attached suspended impurities in the water outside the cylinder wall, thereby playing the role of preliminarily filtering the suspended impurities in the water.

[0008] A lower end cap 10 is mounted on the bottom of the cylinder wall of the first filter layer 11. One end of the lower end cap 10 is fixed to the bottom of the cylinder wall of the first filter layer 11, while the other end is unfixed. An electromagnet 9 is mounted on the bottom of the cylinder wall of the first filter layer 11 corresponding to the unfixed end of the lower end cap 10. When the electromagnet 9 is energized, if the unfixed end of the lower end cap 10 is within a certain range from the electromagnet 9, the lower end cap 10 seals the bottom of the first filter layer 11 under the electromagnetic force of the electromagnet 9. When the electromagnet 9 is de-energized, the lower end cap 10 is no longer affected by the electromagnetic force, and the unfixed end opens, falling to a certain angle under the action of gravity, thereby opening the bottom of the first filter layer 11.

[0009] The bottom of the second filter layer 12 is densely opened with a sieve hole diameter of 2 to 3 mm. During operation, water entering the cylinder of the first filter layer 11 passes through the sieve holes at the bottom of the second filter layer 12 and enters the cylinder of the second filter layer 12, so that the sensor probe electrode 20 is immersed in water. The sieve holes of the second filter layer 12 further filter impurities, so that no suspended impurities adhere to the sensor electrode, allowing the sensor to be used normally while reducing the workload of cleaning the sensor probe electrode.

[0010] The multi-sensor detection and cleaning device is also provided with a support frame 8, on which a baffle 7 and a guide rail 3 are installed; limit switches 6 are also provided on the guide rail 3 and the baffle 7, respectively. The limit switches 6 are divided into upper and lower positions, which are used to control the movement displacement range of the device. When the moving block 2 collides with the upper limit switch, the control circuit signal is triggered to change the movement direction of the first motor 1, thereby changing the movement direction of the moving block 2 and causing the moving block 2 to move downward; when the lower end cover 10 collides with the lower limit switch, the control circuit signal is triggered to change the movement direction of the first motor 1, thereby changing the movement direction of the moving block 2 and causing the moving block 2 to move upward. The electrical circuit diagram for controlling the movement of the first motor 1 through the limit switch is shown in FIG. Figure 7 shown.

[0011] A multi-sensor detection and cleaning method includes the following steps: when the sensor is operating normally, the bottom of the cylinder is sealed, water enters the inner cavity through the sieve holes on the cylinder wall of the first filter layer, and then enters the inner cavity through the sieve holes at the bottom of the second filter layer to submerge the sensor probe electrode, and the sensor monitors the water quality; both the first motor 1 and the second motor 16 have time relays on their control circuits, and the first motor 1 and the second motor 16 are started at regular intervals through timing control. The second motor 16 is started to drive the sensor electrode cleaning component 18 to rotate, and the sensor probe electrode is cleaned by using a soft brush in the sensor electrode cleaning component 18. The first motor 1 is started and the upper and lower limit switches are used to make the moving block 2 reciprocate up and down, thereby driving the first filter layer to reciprocate up and down, and the filter cleaning component 4 is used to clean the sieve holes of the first filter layer 11.

[0012] Compared with the prior art, the present invention has the following advantages and effects:

[0013] (1) The multi-sensor detection and cleaning device of the present invention adopts a double-filtration design. The positions and sizes of the two layers of sieve holes are different. After double-layer filtration, it prevents grass residues and shellfish suspended impurities in the water from adhering to the sensor electrodes, ensuring the normal operation of the sensors while reducing the workload of cleaning the sensor electrodes.

[0014] (2) The multi-sensor detection and cleaning device of the present invention adopts a limit switch and a corresponding motor control electrical circuit, which can regularly complete the cleaning of the sensor electrodes and the filter layer wall, and the cleaning process does not affect the normal operation of the sensor; moreover, the present invention can lift the entire device out of the water, which is convenient for sensor calibration, verification and replacement.

[0015] (3) The multi-sensor detection and cleaning device of the present invention adopts a rotating motor to drive a soft-bristle brush to clean the sensor electrodes. The soft-bristle brush can clean multiple sensor electrodes at the same time, which is efficient, not easy to damage the electrodes, and low in cost. The motor is used to drag the first filter layer cylinder to run back and forth, and the hard-bristle brush is used to clean the impurities attached to the sieve holes on the cylinder wall to avoid clogging of the sieve holes and ensure that the water quality can be detected normally. The electromagnet, limit switch and control circuit design are used to control the opening and closing of the lower end cover, which is conducive to the discharge of impurities in the cylinder.

[0016] (4) The multi-sensor detection and cleaning device of the present invention is easy to assemble, install and disassemble due to the coaxial cylinder structure design of the upper end cover, sensor placement area, first filter layer cylinder, second filter layer cylinder and lower end cover; due to the use of adjustment plugs and compression springs, the sensors are easy to fix, install and replace, and the entire device is simple, practical and low-cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of a multi-sensor detection and cleaning device.

[0018] Figure 2 Schematic diagram of the internal structure of the sensor placement area.

[0019] Figure 3 Schematic diagram of the structure of the sensor electrode cleaning component.

[0020] Figure 4 Schematic diagram of the opening at the bottom of the sensor placement area.

[0021] Figure 5 Schematic diagram of the bottom sieve holes of the second filter layer.

[0022] Figure 6 This is a structural diagram of the filter cleaning components.

[0023] Figure 7 This is an electrical circuit diagram for controlling the movement of the first motor 1.

[0024] Among them, 1. the first motor; 2. the moving block; 3. the guide rail; 4. the filter screen cleaning component; 5. the compression spring; 6. the limit switch; 7. the baffle; 8. the support frame; 9. the electromagnet; 10. the lower end cover; 11. the first filter layer; 12. the second filter layer; 13. the sensor placement area; 14. the upper end cover; 15. the rotating shaft; 16. the second motor; 17. the adjusting plug; 18. the sensor electrode cleaning component; 19. the compression spring; 20. the probe electrode of the sensor. DETAILED DESCRIPTION

[0025] For ease of understanding of the present invention, the present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be pointed out that, for those skilled in the art, without departing from the inventive concept, the present invention can also make several variations and improvements, which all fall within the scope of protection of the present invention.

[0026] Example 1

[0027] The multi-sensor detection and cleaning device of this embodiment is as follows: Figure 1As shown, the device comprises a first motor 1, a moving block 2, a guide rail 3, a filter cleaning component 4, a support frame 8, a first filter layer 11, a second filter layer 12, a sensor placement area 13, and a sensor electrode cleaning component 18. The support frame 8 is mounted with a baffle 7 and a guide rail 3. The guide rail 3 is mounted with a first motor 1 and a moving block 2. The first motor 1 is used to drive the moving block 2, causing it to move up and down along the guide rail. The moving block 2 is connected to a second motor 16 via a cantilever. The rotating shaft 15 of the second motor 16 is fixedly mounted and passes through the center of the bottom of the sensor placement area 13. The movement of the moving block 2 drives the first filter layer 11, the second filter layer 12, and the sensor placement area 13 below the cantilever. Limit switches 6 are also provided on the guide rail 3 and the baffle 7. The limit switches 6 are divided into upper and lower positions to control the movement range of the device. An upper end cover 14 is mounted above the sensor placement area 13, and its bottom is connected to the second filter layer 12. The bottom of the sensor placement area 13 is provided with a central opening and three peripheral openings, such as Figure 4 As shown, the middle opening is used to place the shaft 15 of the second motor 16, and the three peripheral openings are used to install three sensors. The upper body of the sensor is installed at the bottom of the sensor placement area 13, and the probe electrode 20 of the sensor is placed inside the cylinder of the second filter layer 12. Figure 2 As shown, the outer side of the bottom of the sensor placement area 13 is provided with an adjustment plug 17 and a compression spring 19 corresponding to each peripheral opening. The sensor electrode cleaning component 18 is installed on the motor shaft 15 located on the outer side of the bottom of the sensor placement area 13 (i.e., located inside the cylinder of the second filter layer 12). Figure 3 As shown, the soft brush in the sensor electrode cleaning component corresponds to the bottom opening position of the sensor placement area 13. The second filter layer 12 is connected to the first filter layer 11. The bottom of the second filter layer 12 is provided with a sieve hole (such as Figure 5 The first filter layer 11 is provided with a sieve hole on the wall, the guide rail 3 and the first filter layer 11 corresponding to the sieve hole position is installed with a filter cleaning component 4 (such as Figure 6 shown).

[0028] When the sensor is working properly, the bottom of the cylinder is sealed, water enters the inner cavity through the sieve holes on the cylinder wall of the first filter layer, and then enters the inner cavity through the sieve holes at the bottom of the second filter layer to submerge the sensor probe electrode, and the sensor monitors the water quality. The electrical circuit diagram for controlling the operation of the first motor 1 is shown in the figure below. Figure 7As shown, both the first motor 1 and the second motor 16 have time relays in their control circuits. Through timed control, the second motor 16 starts once daily for three to five minutes, rotating the sensor electrode cleaning component 18. The soft brush in the sensor electrode cleaning component 18 cleans the sensor probe electrodes. The first motor 1 starts once weekly for ten to twenty minutes. Upper and lower limit switches cause the moving block 2 to reciprocate up and down, driving the first filter layer 11 to reciprocate up and down. The filter cleaning component 4 cleans the mesh of the first filter layer 11. When the sensor has been used for a period of time, such as three to four months, it needs to be recalibrated; or after two to three years of use, the sensor needs to be replaced. By adjusting the position of the upper limit switch, the first motor 1 is controlled to make the moving block 2 move upward until the bottom of the first filter layer 11 is exposed to the water surface to a suitable height. The stop button in the electrical circuit diagram that controls the movement of the first motor 1 is pressed, and the first motor 1 stops running. The water in the second filter layer 12 and the first filter layer 11 flows out from the sieve holes and the lower end cover 10. After disassembling the filter layer, calibration or sensor replacement can be conveniently performed. When the sieve holes of the first filter layer 11 need to be cleaned, the power switch of the first motor 1 is turned on, and the first motor 1 drags the moving block 2 to move. The moving block 2 drives the cantilever and the sensor placement area connected to the cantilever and the filter layer to move together. The upper and lower limit switches are used to control the first motor 1 to change the running direction, driving the moving block 2 to do reciprocating motion, so that the sieve holes on the cylinder wall of the first filter layer 11 are repeatedly rubbed and cleaned by the hard brush of the filter cleaning component 4; the power switch of the electromagnet at the bottom of the cylinder wall is turned off, and the lower end cover is opened, so that the cleaned impurities can be discharged from the bottom. After cleaning is completed, the first motor 1 is controlled to drag the moving block 2 downward and the power switch of the electromagnet at the bottom of the cylinder wall is turned on. When the lower end cover contacts the lower limit switch, the lower end cover will be forced to move closer to the electromagnet. When it approaches the electromagnet, the lower end cover will adsorb and seal the bottom of the cylinder wall under the action of the electromagnetic force. Under the action of the lower limit switch, the first motor 1 starts to move in the reverse direction, and then the power switch of the first motor 1 is turned off through the delay control, waiting for the next cleaning instruction. When the sensor probe electrode needs to be cleaned, the power switch of the second motor 16 is turned on, and the rotating shaft of the second motor 16 drives the soft brush in the sensor electrode cleaning component 18 to rotate, and the soft brush cleans each sensor electrode. After the cleaning is completed, the power switch of the second motor 16 is automatically turned off after the second motor 16 has worked for a period of time through the delay control of the time relay, waiting for the next cleaning instruction.

[0029] Example 2

[0030] For pond-raised eels, the sensor detection and cleaning device of the present invention can be set up in the water area near the shore of the pond, and the power supply is provided by the power distribution box of the breeding farm. Various sensors are used to monitor the water quality parameters of the pond, such as four sensors for water temperature and pH value, dissolved oxygen, redox, and ammonia nitrogen. The diameter of the cylinder in the sensor placement area is about 30 cm, and the length of the cylinder is about 30 cm. The inner cavity accommodates the main part of the sensor. Four holes are evenly opened around the motor shaft at the bottom of the cylinder, and four sensors are arranged. The sensors are fixed by adjusting plugs and compression springs, and the position of the sensor electrodes can be adjusted to match the position of the soft brush. The cylinder of the second filter layer connected to the sensor placement area has a diameter of about 30 cm and a length of about 10 cm. The bottom of the cylinder has dense openings and a sieve hole diameter of about 2-3 mm. The sensor probe electrode is located inside the cylinder of the second filter layer. When water flows in through the sieve hole after being filtered, the water quality is clean and the sensor electrode is immersed in water. The second filter layer is connected to the first filter layer below. Its cylinder has a diameter of approximately 30 cm and a length of approximately 20 cm. The curved side of the cylinder near the linear guide is densely perforated with sieve holes with a diameter of 6-8 mm. These sieve holes filter and clean the filter, retaining most debris outside the cylinder wall. A lower cap is installed at the bottom of the first filter layer cylinder. One end of the cap is attached to the cylinder, while the other end is free-standing. This cap seals the bottom of the cylinder under the action of electromagnetic force. A rotating motor is installed at the top of the cylinder in the sensor placement area. Since the motor only needs to rotate a soft-bristled brush to clean the sensor electrodes, the motor power is relatively low, 100-200W. A linear motor is installed at the top end of the linear guide, reciprocating up and down along the linear guide. The motor power is 1-2kW. A filter cleaning unit is installed on the linear guide and connected to the linear guide via a compression spring. The filter cleaning unit has a hard-bristled brush. A baffle is installed at the bottom of the linear guide. The upper cover 14, the sensor placement area 13, the second filter layer 12, and the first filter layer device 11 can be connected together through a threaded design or bolts and nuts, which is easy to install and disassemble, and is beneficial to operations such as sensor installation, calibration, and replacement.

[0031] During the cleaning process, after the soft and hard brushes are driven by the corresponding motors, the cleaning effects are as follows: (1) The surface of the sensor electrode is free of impurities in the water, dirt, and scratches, and is clean and bright, and the water quality detection effect is accurate; (2) There is no obvious impurities in the water attached to the surface of the open wall filter of the first filter layer, the water inlet and outlet of the sieve holes are smooth, and the incoming water basically does not contain debris, which will not cause adverse effects on the sensor electrode detection.

[0032] Example 3

[0033] For deep-sea cage aquaculture, the sensor detection and cleaning device of the present invention can be installed next to the cage, powered by batteries and solar panels. Various sensors are used to monitor ocean water quality parameters, such as five sensors for water temperature, pH, dissolved oxygen, salinity, ammonia nitrogen, and transparency.

[0034] The sensor placement area has a cylinder diameter of approximately 40cm and a sealed cylinder length of approximately 30cm. The inner cavity houses the main sensor body. Five holes are evenly spaced around the motor shaft at the bottom of the sealed cylinder, housing the five sensors. The sensors are secured by an adjusting plug and a compression spring, and the sensor electrodes can be adjusted to align with the soft brush. The second filter layer, connected to the sensor placement area, has a cylinder diameter of approximately 40cm and a length of approximately 10cm. The bottom of the cylinder is densely perforated, with a sieve diameter of approximately 3-4mm. The sensor probe electrodes are located within the cylinder of the second filter layer. When water flows through the filtered sieve holes, it is purified, and the sensor electrodes are immersed in the water. The first filter layer, connected below the second filter layer, has a cylinder diameter of approximately 40cm and a length of approximately 20cm. The curved side of the cylinder wall, near the linear guide, is densely perforated, with a sieve diameter of 8-10mm. The sieve holes filter and clean the water, keeping most debris out of the cylinder wall. A lower end cover is installed at the bottom of the cylinder of the first filter layer. The end of the lower end cover close to the linear guide is attracted by the electromagnet, and the other end is installed on the cylinder. A rotating motor is installed on the upper part of the cylinder in the sensor placement area. Since the motor only needs to drive the soft brush to rotate and clean the sensor electrode, the motor power is relatively small, 200-300W. A motor and a moving block are installed at the upper end of the linear guide. The motor can drive the moving block to move back and forth along the linear guide. The motor power is 2-3kW. The cylinder wall sieve filter cleaning component of the first filter layer is installed on the linear guide and is connected to the linear guide through a compression spring. There is a hard brush on the filter cleaning component. A baffle is installed at the bottom of the linear guide.

[0035] The above descriptions are merely embodiments of the present invention, but the implementation methods of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention are equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A multi-sensor detection and cleaning device, characterized in that: The filter element is a filter element having a first filter layer, a second filter layer and a sensor placement area; the bottom of the sensor placement area is connected to the second filter layer, and the bottom of the sensor placement area is provided with a middle opening and peripheral openings, the middle opening is used to place the rotating shaft of the second motor, and the peripheral openings are used to install the sensor; the upper body of the sensor is installed at the bottom of the sensor placement area, and the probe electrode of the sensor passes through the peripheral opening and is placed inside the cylinder of the second filter layer; the second filter layer is connected to the first filter layer, and the bottom of the second filter layer is provided with sieve holes; the cylinder wall of the first filter layer is provided with sieve holes; a first motor and a moving block are installed on the guide rail, the first motor is used to drive the moving block so that the moving block moves up and down along the guide rail; the moving block is connected to the second motor through a cantilever, and the rotating shaft of the second motor is fixedly installed and passes through the middle opening at the bottom of the sensor placement area, and the movement of the moving block drives the sensor placement area, the second filter layer and the first filter layer below the cantilever to move together; A sensor electrode cleaning component is installed on the motor shaft located on the bottom outside of the sensor placement area. The soft brush in the sensor electrode cleaning component corresponds to the bottom opening position of the sensor placement area. The soft brush rotates under the drive of the motor to clean the probe electrode of the sensor; a filter cleaning component is installed on the guide rail at a position corresponding to the sieve hole of the first filter layer. One end of the filter cleaning component is fixed to the guide rail by a compression spring, and the other end of the filter cleaning component is installed with a hard brush. The hard brush is used to remove impurities attached to the sieve holes of the first filter layer; the sieve hole diameter of the first filter layer is 6 to 8 mm, and the sieve hole diameter of the second filter layer is 2 to 3 mm; a lower end cover is installed at the bottom of the cylinder wall of the first filter layer, one end of the lower end cover is fixed to the bottom of the cylinder wall of the first filter layer, and the other end is not fixed. An electromagnet is installed at the bottom of the cylinder wall corresponding to the unfixed end, and the electromagnet is used to control the opening and closing of the lower end cover.

2. The multi-sensor detection and cleaning device according to claim 1, characterized in that: An upper end cover is installed on the upper part of the sensor placement area, and an adjusting plug and a pressing spring are provided on the outer side of the bottom of the sensor placement area corresponding to each peripheral opening.

3. The multi-sensor detection and cleaning device according to claim 1, characterized in that: A support frame is also provided, on which a baffle and a guide rail are installed; limit switches are respectively provided on the guide rail and the baffle for controlling the movement displacement range of the device.

4. A multi-sensor detection and cleaning method, characterized in that: The multi-sensor detection and cleaning device according to claim 3 includes the following steps: when the sensor is operating normally, the bottom of the cylinder is sealed, water enters the inner cavity through the sieve holes on the cylinder wall of the first filter layer, and then enters the inner cavity through the sieve holes at the bottom of the second filter layer to submerge the sensor probe electrode, and the sensor monitors the water quality; There are time relays on the control circuits of the first motor and the second motor. The first motor and the second motor are started at regular intervals through timing control. The second motor is started to drive the sensor electrode cleaning component to rotate, and the sensor probe electrode is cleaned by the soft brush in the sensor electrode cleaning component. The first motor is started and the moving block is moved up and down through the upper and lower limit switches, driving the first filter layer to move up and down, and the filter cleaning component is used to clean the sieve holes of the first filter layer.

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