Irrigation plate gate water leakage monitoring device and monitoring method

Abstract

The invention discloses an irrigation plate gate water leakage monitoring device and method, and aims at the condition that one side of the front surface of a gate plate is in a water-free environment, the irrigation plate gate water leakage monitoring device comprises a capacitive sensing unit which is arranged on the front surface of the gate plate and is close to a gate frame; the capacitive sensing unit comprises a porous sponge body which is laid on the front face of the gate plate and serves as a dielectric medium, a conductive plate serving as a positive electrode is laid on the outer side face of the porous sponge body, the gate plate is grounded through the gate frame and serves as a negative electrode, and the conductive plate is connected with the positive electrode of a power source through a conductive belt. The porous sponge body is used for adsorbing water leaking from one side of the back face of the gate plate to one side of the front face of the gate plate, the dielectric constant is changed, the capacitance value of the capacitance sensing unit is changed, and the water leakage condition between the gate plate and the gate frame is monitored by monitoring the capacitance value change condition of the capacitance sensing unit. The water leakage condition between the gate plate and the gate frame in the irrigation plate gate can be effectively monitored.

Description

Technical Field

[0001] The invention belongs to the technical field of irrigation sluice gates, and in particular relates to an irrigation sluice gate water leakage monitoring device and a monitoring method. Background Art

[0002] Irrigation sluice gates are an important device for controlling water flow. They are widely used in agricultural irrigation and water conservancy projects. They are usually installed in channels, pipes or rivers of irrigation systems to adjust water levels and flows to ensure the rational allocation and effective use of water resources.

[0003] When irrigation gates are used on main canals and branch canals, in these main channels, irrigation gates can achieve basic control of water flow and ensure the rational allocation of water resources; when irrigation gates are used on ditches and agricultural canals, in these branch channels, irrigation gates can monitor the flow and time of irrigation water in real time to achieve precise irrigation; in the fields, irrigation gates can adjust the amount of irrigation water according to the specific water requirements of crops and environmental changes.

[0004] However, the irrigation system in rural areas is complex, many irrigation gates are located in remote areas and lack effective maintenance. Water leakage in irrigation gates is common, so it is necessary to monitor water leakage in irrigation gates. Summary of the invention

[0005] In view of the above-mentioned defects of the prior art, the present invention provides an irrigation sluice gate water leakage monitoring device and monitoring method, which can effectively monitor the water leakage between the gate plate and the gate frame in the irrigation sluice gate.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A device for monitoring water leakage of an irrigation plate gate, the irrigation plate gate comprising a gate frame and a gate plate, one side of the gate plate being called the front side of the gate plate, and the other side being called the back side of the gate plate, the back side of the gate plate being in a water environment, and the front side of the gate plate being in a water-free or water environment, for the case where the front side of the gate plate is in a water-free environment, the device for monitoring water leakage comprises a capacitive sensing unit arranged on the front side of the gate plate adjacent to the gate frame, the capacitive sensing unit comprising a porous sponge body laid on the front side of the gate plate and serving as a dielectric, a conductive plate serving as a positive electrode being laid on the outer surface of the porous sponge body, the gate plate being grounded through the gate frame and serving as a negative electrode, the conductive plate being connected to the positive electrode of a power supply through a conductive tape, the porous sponge body being used to absorb water leaking from the back side of the gate plate to the front side of the gate plate, causing the dielectric constant to change, and causing the capacitance value of the capacitive sensing unit to change, and the water leakage between the gate plate and the gate frame is monitored by monitoring the capacitance value change of the capacitive sensing unit.

[0008] Furthermore, there are multiple capacitive sensing units that are arranged side by side from top to bottom on the front of the gate plate, adjacent to the vertical frame in the gate frame; the porous sponge bodies and conductive plates of adjacent capacitive sensing units are separated by insulators, so that the multiple capacitive sensing units are connected in parallel; according to the setting position of each capacitive sensing unit on the front of the gate plate, and by monitoring the change in the capacitance value of the corresponding capacitive sensing unit, the water leakage between the corresponding position on one side end of the gate plate and the vertical frame in the gate frame is monitored.

[0009] Furthermore, the conductive tape is laid on the outer surface of the conductive plate, the conductive tapes of adjacent capacitive sensing units are connected end to end, the power supply is arranged at the top of the gate plate, and the top of the conductive tape of the uppermost capacitive sensing unit is connected to the positive pole of the power supply through a connecting wire.

[0010] Furthermore, the conductive plate is a magnetic copper-attached conductive plate, the main body of the conductive plate is a magnetic material, and the outer side of the conductive plate is provided with a copper film by electroplating. The magnetic copper-attached conductive plate is attracted to the gate plate by the magnetic material of the main body of the conductive plate and fixes the porous sponge body; the conductive belt is made of hard copper, the length of the conductive belt is equal to the length of the copper film electroplated on the outer side of the corresponding conductive plate, and is connected to the copper film electroplated on the outer side of the corresponding conductive plate by laser welding, the upper end of the conductive belt is integrally connected with an elastic conductive contact pin, the lower part of the conductive contact pin is tightly attached to the insulator on the upper end of the corresponding conductive plate, the middle part of the conductive contact pin is suspended, and the upper part of the conductive contact pin is pressed on the lower part of the conductive belt of the upper adjacent capacitive sensing unit under the action of elastic pressure, so that the conductive belts of the two adjacent capacitive sensing units are electrically connected.

[0011] Furthermore, the insulator is insulating rubber.

[0012] Furthermore, in view of the situation that the front side of the gate plate is in a water environment, the water leakage monitoring device also includes an inner electrode in the water on the back side of the gate plate, the inner electrode is connected to the negative electrode of the power supply through a conductive rod, a plurality of the capacitive sensing units are immersed in water and form an integrated capacitor with the inner electrode, a plurality of the conductive plates connected in parallel cooperate to form the positive electrode of the integrated capacitor, the inner electrode serves as the negative electrode of the capacitor, the water on the front side of the gate plate, the insulating waterproof paint coated on the front side of the gate plate, the metal body of the gate plate, the insulating waterproof paint coated on the back side of the gate plate, and the water on the back side of the gate cooperate to form an integrated dielectric of the integrated capacitor, water leaks between the bottom end of the gate plate and the bottom frame in the gate frame, or water leaks between one side of the gate plate and the vertical frame in the gate frame, so that the water on the front side of the gate plate is connected to the water on the back side of the gate plate, and the dielectric constant of the integrated dielectric changes, and the capacitance value of the integrated capacitor changes, and by monitoring the change in the capacitance value of the integrated capacitor, the water leakage between the gate plate and the gate frame is monitored when there is water on both the front side and the back side of the gate plate.

[0013] Furthermore, the inner electrode is a floating inner electrode and floats in water.

[0014] Furthermore, one end of the conductive rod is hinged to the inner electrode, and the other end is hinged to the negative electrode of the power source.

[0015] A method for monitoring water leakage of an irrigation plate gate, wherein the front side of the gate plate is in a waterless environment, the above-mentioned irrigation plate gate water leakage monitoring device is used for monitoring, specifically: the porous sponge absorbs water that leaks from the back side of the gate plate to the front side of the gate plate, causing the dielectric constant to change, and causing the capacitance value of the capacitive sensing unit to change, and the water leakage between the gate plate and the gate frame is monitored by monitoring the change in the capacitance value of the capacitive sensing unit.

[0016] A method for monitoring water leakage of an irrigation plate gate, wherein the irrigation plate gate water leakage monitoring device described above is used for monitoring when the front side of the gate plate is in a water environment, specifically: water leakage occurs between the bottom end of the gate plate and the bottom frame in the gate frame, or water leakage occurs between one side of the gate plate and the vertical frame in the gate frame, so that the water on the front side of the gate plate is connected to the water on the back side of the gate plate, and the dielectric constant of the integrated dielectric changes, and the capacitance value of the integrated capacitor changes. By monitoring the change in the capacitance value of the integrated capacitor, the water leakage between the gate plate and the gate frame is monitored when there is water on both the front side and the back side of the gate plate.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] In view of the situation that the front side of the gate is in a waterless environment, the irrigation plate gate water leakage monitoring device in the present invention includes a capacitive sensing unit arranged on the front side of the gate and adjacent to the gate frame. The capacitive sensing unit includes a porous sponge body laid on the front side of the gate and serving as a dielectric. A conductive plate serving as a positive electrode is laid on the outer surface of the porous sponge body. The gate is grounded through the gate frame and serves as a negative electrode. The conductive plate is connected to the positive electrode of the power supply through a conductive belt. In this way, the porous sponge body absorbs water that leaks from the back side of the gate to the front side of the gate, causing the dielectric constant to change and the capacitance value of the capacitive sensing unit to change. By monitoring the capacitance value change of the capacitive sensing unit, the water leakage between the gate and the gate frame can be effectively monitored.

[0019] In the present invention, there are multiple capacitive sensing units arranged side by side from top to bottom on the front of the gate plate, adjacent to the vertical frame in the gate frame; the porous sponge bodies and conductive plates of adjacent capacitive sensing units are separated by insulators, so that multiple capacitive sensing units are connected in parallel. In this way, according to the setting position of each capacitive sensing unit on the front of the gate plate, and by monitoring the change of the capacitance value of the corresponding capacitive sensing unit, the water leakage between the corresponding position of one side end of the gate plate and the vertical frame in the gate frame is monitored, so the specific water leakage position of one side end of the gate plate can be accurately monitored through multiple capacitive sensing units.

[0020] In the present invention, the conductive plate is a magnetic copper-attached conductive plate, the conductive plate body is a magnetic material, the outer side of the conductive plate is provided with a copper film by electroplating, and the magnetic copper-attached conductive plate attracts the gate plate through the magnetic material of the conductive plate body and fixes the porous sponge body; the conductive belt is made of hard copper, the length of the conductive belt is equal to the length of the copper film electroplated on the outer side of the corresponding conductive plate, and is connected to the copper film electroplated on the outer side of the corresponding conductive plate by laser welding, the upper end of the conductive belt is integrally connected with an elastic conductive contact foot, the lower part of the conductive contact foot is close to the insulator on the upper end of the corresponding conductive plate, the middle part of the conductive contact foot is suspended, and the upper part of the conductive contact foot is pressed on the lower part of the conductive belt of the upper adjacent capacitive sensing unit under the action of elastic pressure, so that the conductive belts of the two adjacent capacitive sensing units are electrically connected. In this way, each capacitive sensing unit can be installed on the front of the gate plate by magnetic attraction, and each insulator is clamped by the corresponding two capacitive sensing units, so the installation of the irrigation plate gate water leakage monitoring device is simple and convenient.

[0021] In view of the situation that the front side of the gate is in a water environment, the irrigation plate gate water leakage monitoring device in the present invention also includes an inner electrode in the water on the back side of the gate, the inner electrode is connected to the negative electrode of the power supply through a conductive rod, a plurality of capacitive sensing units are immersed in water and form an integrated capacitor with the inner electrode, a plurality of parallel conductive plates cooperate to form the positive electrode of the integrated capacitor, the inner electrode serves as the negative electrode of the capacitor, the water on the front side of the gate, the insulating waterproof paint coated on the front side of the gate, the metal body of the gate, the insulating waterproof paint coated on the back side of the gate, and the water on the back side of the gate cooperate to form the integrated dielectric of the integrated capacitor. In this way, water leaks between the bottom end of the gate and the bottom frame of the gate frame, or water leaks between one side of the gate and the vertical frame of the gate frame, so that the water on the front side of the gate is connected with the water on the back side of the gate, and the dielectric constant of the integrated dielectric changes, and the capacitance value of the integrated capacitor changes. By monitoring the change in the capacitance value of the integrated capacitor, the water leakage between the gate and the gate frame can be effectively monitored when there is water on both the front side and the back side of the gate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the irrigation sluice water leakage monitoring device in Example 1 of the present invention;

[0023] Figure 2 for Figure 1 A schematic diagram of a local enlarged structure;

[0024] Figure 3 for Figure 1 A schematic diagram of the three-dimensional structure in another direction;

[0025] Figure 4 for Figure 3 A schematic diagram of a local enlarged structure;

[0026] Figure 5 for Figure 3 A schematic diagram of a three-dimensional enlarged structure of one of the capacitive sensing units in another direction;

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the irrigation sluice water leakage monitoring device in Example 2 of the present invention;

[0028] Figure 7 for Figure 6 A schematic diagram of a local enlarged structure;

[0029] Figure 8 for Figure 6 A schematic diagram of the three-dimensional structure in another direction;

[0030] Fig. 9 for Figure 8 Schematic diagram of the local enlarged structure.

[0031] Explanation of the reference numerals in the figure: 101, gate frame, 10101, vertical frame, 10102, bottom frame, 102, gate plate, 10201, front side of gate plate, 10202, back side of gate plate, 103, screw, 201, porous sponge, 202, conductive plate, 203, conductive belt, 204, power supply, 205, insulator, 206, connecting wire, 207, inner electrode, 208, conductive rod, 209, conductive contact pin. DETAILED DESCRIPTION

[0032] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, but not to limit the present invention.

[0033] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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 and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0036] In the present invention, the irrigation plate gate includes a gate frame 101 and a gate plate 102. The gate plate 102 is driven up and down by a screw rod 103 to open or close the irrigation plate gate. One side of the gate plate 102 is called the front side 10201 of the gate plate, and the other side is called the back side 10202 of the gate plate. The back side 10202 of the gate plate is always in a water environment, and the front side 10201 of the gate plate is in a water-free or water environment.

[0037] Example 1

[0038] like Figure 1-Figure 5As shown, for the situation where one side of the gate plate front 10201 is in a waterless environment, an irrigation plate gate leakage monitoring device includes a capacitive sensing unit arranged on the gate plate front 10201 and adjacent to the gate door frame 101, the capacitive sensing unit includes a porous sponge 201 laid on the gate plate front 10201 and serving as a dielectric, a conductive plate 202 serving as a positive electrode is laid on the outer surface of the porous sponge 201, the gate plate 102 is grounded through the gate door frame 101 and serves as a negative electrode, the conductive plate 202 is connected to the positive electrode of the power supply 204 through a conductive tape 203, the porous sponge 201 is used to absorb water that leaks from the gate plate back 10202 side to the gate plate front 10201 side, so that the dielectric constant changes and the capacitance value of the capacitive sensing unit changes, and the water leakage between the gate plate 102 and the gate door frame 101 is monitored by monitoring the capacitance value change of the capacitive sensing unit. The porous sponge 201 is made of porous supporting material and has certain water absorption and mechanical strength.

[0039] In this way, when monitoring the water leakage of the irrigation plate gate, in view of the situation that the front side 10201 of the gate plate is in a waterless environment, the monitoring method is specifically as follows: the porous sponge 201 absorbs the water that leaks from the back side 10202 of the gate plate to the front side 10201 of the gate plate, so that the dielectric constant changes, and the capacitance value of the capacitive sensing unit changes. By monitoring the change of the capacitance value of the capacitive sensing unit, the water leakage between the gate plate 102 and the gate frame 101 can be effectively monitored.

[0040] Among them, Figure 1-Figure 4 As shown, there are multiple capacitive sensing units arranged side by side from top to bottom on the front face 10201 of the gate plate, adjacent to the vertical frame 10101 in the gate door frame 101; the porous sponge 201 and the conductive plate 202 of adjacent capacitive sensing units are separated by an insulator 205, so that multiple capacitive sensing units are connected in parallel. In this way, according to the setting position of each capacitive sensing unit on the front face 10201 of the gate plate, and by monitoring the change of the capacitance value of the corresponding capacitive sensing unit, the water leakage between the corresponding position of one side end of the gate plate 102 and the vertical frame 10101 in the gate door frame 101 is monitored, so the specific water leakage position of one side end of the gate plate 102 can be accurately monitored through multiple capacitive sensing units.

[0041] Preferably, the conductive tape 203 is laid on the outer surface of the conductive plate 202, the conductive tapes 203 of adjacent capacitive sensing units are connected end to end, the power supply 204 is arranged on the top of the gate 102, and the top of the conductive tape 203 of the uppermost capacitive sensing unit is connected to the positive electrode of the power supply 204 through the connecting wire 206, see Figure 4 .

[0042] Preferably, the conductive plate 202 is a magnetic copper-attached conductive plate. Specifically, the conductive plate 202 is made of magnetic material. The outer side of the conductive plate 202 is provided with a copper film by electroplating, which serves as the conductive material of the device electrode. The magnetic copper-attached conductive plate is attracted to the gate plate 102 by the magnetic material of the conductive plate 202 and fixes the porous sponge 201. The conductive belt 203 is made of hard copper, such as Figure 5 As shown, the length of the conductive strip 203 is equal to the length of the copper film electroplated on the outer surface of the corresponding conductive plate 202, and is connected to the copper film electroplated on the outer surface of the corresponding conductive plate 202 by laser welding. The upper end of the conductive strip 203 is integrally connected with an elastic conductive contact pin 209, the lower part of the conductive contact pin 209 is close to the insulator 205 at the upper end of the corresponding conductive plate 202, the middle part of the conductive contact pin 209 is suspended, and the upper part of the conductive contact pin 209 is pressed on the lower part of the conductive strip 203 of the upper adjacent capacitive sensing unit under the action of elastic pressure, so that the conductive strips 203 of the two adjacent capacitive sensing units are electrically connected. In this way, each capacitive sensing unit can be installed on the gate front 10201 by magnetic attraction, and each insulator 205 is clamped by the corresponding two capacitive sensing units, so the installation of the irrigation gate water leakage monitoring device is simple and convenient.

[0043] Preferably, the insulator 205 is insulating rubber. A method for monitoring water leakage of an irrigation plate gate, in which the front side 10201 of the gate plate is in a waterless environment, uses the above-mentioned irrigation plate gate water leakage monitoring device for monitoring, specifically: the porous sponge 201 absorbs water that leaks from the back side 10202 of the gate plate to the front side 10201 of the gate plate, so that the dielectric constant changes and the capacitance value of the capacitive sensing unit changes, and the water leakage between the gate plate 102 and the gate door frame 101 is monitored by monitoring the capacitance value change of the capacitive sensing unit. Example 2

[0044] like Figure 5-Figure 8 As shown, for the situation where the front side 10201 of the gate plate is in a water environment, an irrigation plate gate leakage monitoring device, in addition to the multiple capacitive sensing units of Example 1, also includes an inner electrode 207 in the water on the back side 10202 of the gate plate, the inner electrode 207 is connected to the negative electrode of the power supply 204 through a conductive rod 208, the multiple capacitive sensing units are immersed in water and form an integrated capacitor with the inner electrode 207, the multiple parallel conductive plates 202 cooperate to form the positive electrode of the integrated capacitor, the inner electrode 207 serves as the negative electrode of the capacitor, the water on the front side 10201 of the gate plate, the insulating waterproof paint coated on the front side 10201 of the gate plate, the metal body of the gate plate 102, the insulating waterproof paint coated on the back side 10202 of the gate plate, and the water on the back side of the gate cooperate to form an integrated dielectric of the integrated capacitor.

[0045] In this way, when monitoring the leakage of the irrigation plate gate, for the situation where the front side 10201 of the gate plate is in a water environment, the monitoring method is specifically as follows: water leakage between the bottom end of the gate plate 102 and the bottom frame 10102 in the gate frame 101, or water leakage between one side of the gate plate 102 and the vertical frame 10101 in the gate frame 101, so that the water on the front side 10201 of the gate plate is connected with the water on the back side 10202 of the gate plate, and the dielectric constant of the integrated dielectric changes, and the capacitance value of the integrated capacitor changes. By monitoring the change in the capacitance value of the integrated capacitor, the water leakage between the gate plate 102 and the gate frame 101 can be effectively monitored when there is water on both the front side 10201 of the gate plate and the back side 10202 of the gate plate.

[0046] The inner electrode 207 is a floating inner electrode and floats in the water.

[0047] One end of the conductive rod 208 is hinged to the inner electrode 207 , and the other end is hinged to the negative electrode of the power source 204 .

[0048] A method for monitoring water leakage of an irrigation plate gate, wherein the above-mentioned water leakage monitoring device of the irrigation plate gate is used for monitoring when one side of the gate plate front face 10201 is in a water environment, specifically: water leakage between the bottom end of the gate plate 102 and the bottom frame 10102 in the gate door frame 101, or water leakage between one side end of the gate plate 102 and the vertical frame 10101 in the gate door frame 101, makes the water on the gate plate front face 10201 side and the water on the gate plate back face 10202 side conduct, and makes the dielectric constant of the integrated dielectric change, and makes the capacitance value of the integrated capacitor change, by monitoring the change of the capacitance value of the integrated capacitor, the water leakage between the gate plate 102 and the gate door frame 101 is monitored when there is water on both the gate plate front face 10201 side and the gate plate back face 10202 side.

[0049] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A device for monitoring water leakage of an irrigation slab gate, the irrigation slab gate comprising a gate frame (101) and a gate plate (102), one side of the gate plate (102) being called the gate plate front side (10201), and the other side being called the gate plate back side (10202), the gate plate back side (10202) being always in a water environment, and the gate plate front side (10201) being in a waterless or water environment, characterized in that: In view of the situation that one side of the gate plate front (10201) is in a waterless environment, the water leakage monitoring device includes a capacitive sensing unit arranged on the gate plate front (10201) at a position close to the gate door frame (101), the capacitive sensing unit includes a porous sponge (201) laid on the gate plate front (10201) and serving as a dielectric, a conductive plate (202) serving as a positive electrode is laid on the outer surface of the porous sponge (201), and the gate plate (102) is connected to the gate door frame (10201) by a conductive plate (202) serving as a positive electrode. 1) is grounded and serves as a negative electrode, the conductive plate (202) is connected to the positive electrode of the power supply (204) through a conductive tape (203), the porous sponge (201) is used to absorb water that leaks from the back side of the gate plate (10202) to the front side of the gate plate (10201), so that the dielectric constant changes and the capacitance value of the capacitive sensing unit changes, and the water leakage between the gate plate (102) and the gate door frame (101) is monitored by monitoring the capacitance value change of the capacitive sensing unit.

2. The irrigation sluice gate water leakage monitoring device according to claim 1, characterized in that: The capacitive sensing units are multiple and arranged side by side from top to bottom on the front side (10201) of the gate plate, adjacent to the vertical frame (10101) in the gate door frame (101); the porous sponge bodies (201) and the conductive plates (202) of adjacent capacitive sensing units are separated by an insulator (205), so that the multiple capacitive sensing units are connected in parallel; according to the setting position of each capacitive sensing unit on the front side (10201) of the gate plate, and by monitoring the change of the capacitance value of the corresponding capacitive sensing unit, the water leakage between the corresponding position of one side end of the gate plate (102) and the vertical frame (10101) in the gate door frame (101) is monitored.

3. The irrigation sluice gate water leakage monitoring device according to claim 2, characterized in that: The conductive strip (203) is laid on the outer surface of the conductive plate (202), the conductive strips (203) of adjacent capacitive sensing units are connected end to end, the power supply (204) is arranged on the top of the gate plate (102), and the top of the conductive strip (203) of the capacitive sensing unit on the uppermost side is connected to the positive electrode of the power supply (204) through a connecting wire (206).

4. The irrigation sluice gate water leakage monitoring device according to claim 2, characterized in that: The conductive plate (202) is a magnetic copper-attached conductive plate. The main body of the conductive plate (202) is made of magnetic material. The outer side of the conductive plate (202) is provided with a copper film by electroplating. The magnetic copper-attached conductive plate is attracted to the gate plate (102) by the magnetic material of the main body of the conductive plate (202) and fixes the porous sponge (201). The conductive belt (203) is made of hard copper. The length of the conductive belt (203) is equal to the length of the copper film electroplated on the outer side of the corresponding conductive plate (202). The conductive belt (203) is connected to the corresponding conductive plate (202) by laser welding. The conductive strip (203) is connected to the copper film electroplated on the outer surface of the conductive plate (202); the upper end of the conductive strip (203) is integrally connected with an elastic conductive contact pin (209); the lower part of the conductive contact pin (209) is in close contact with the insulator (205) at the upper end of the corresponding conductive plate (202); the middle part of the conductive contact pin (209) is suspended in the air; the upper part of the conductive contact pin (209) is pressed on the lower part of the conductive strip (203) of the upper adjacent capacitive sensing unit under the action of elastic pressure, so that the conductive strips (203) of the two adjacent capacitive sensing units are electrically connected.

5. The irrigation sluice gate water leakage monitoring device according to claim 2, characterized in that: The insulator (205) is insulating rubber.

6. The irrigation sluice gate water leakage monitoring device according to claim 2, characterized in that: In view of the situation that the front side (10201) of the gate plate is in a water environment, the water leakage monitoring device further comprises an inner electrode (207) in the water on the back side (10202) of the gate plate, the inner electrode (207) is connected to the negative electrode of the power supply (204) through a conductive rod (208), a plurality of the capacitive sensing units are immersed in water and form an integrated capacitor with the inner electrode (207), a plurality of the conductive plates (202) connected in parallel cooperate to form the positive electrode of the integrated capacitor, the inner electrode (207) serves as the negative electrode of the capacitor, the water on the front side (10201) of the gate plate, the insulating waterproof paint coated on the front side (10201) of the gate plate, the metal body of the gate plate (102), the insulating waterproof paint coated on the back side (10202) of the gate plate, the The water on the back side of the door cooperates with the integrated dielectric of the integrated capacitor, and water leaks between the bottom end of the gate plate (102) and the bottom frame (10102) in the gate door frame (101), or water leaks between one side of the gate plate (102) and the vertical frame (10101) in the gate door frame (101), so that the water on the front side (10201) of the gate plate and the water on the back side (10202) of the gate plate are connected, and the dielectric constant of the integrated dielectric changes, and the capacitance value of the integrated capacitor changes. By monitoring the change in the capacitance value of the integrated capacitor, the water leakage between the gate plate (102) and the gate door frame (101) is monitored when there is water on both the front side (10201) and the back side (10202) of the gate plate.

7. The irrigation sluice gate water leakage monitoring device according to claim 6, characterized in that: The inner electrode (207) is a floating inner electrode and floats in water.

8. The irrigation sluice gate water leakage monitoring device according to claim 6, characterized in that: One end of the conductive rod (208) is hinged to the inner electrode (207), and the other end is hinged to the negative electrode of the power source (204).

9. A method for monitoring water leakage of an irrigation sluice gate, wherein the front side (10201) of the gate plate is in a waterless environment, and the method adopts the irrigation sluice gate water leakage monitoring device as claimed in any one of claims 1 to 5 for monitoring, wherein: Specifically, the porous sponge (201) absorbs water that leaks from the back side (10202) of the gate plate to the front side (10201) of the gate plate, causing the dielectric constant to change and the capacitance value of the capacitive sensing unit to change. By monitoring the change in the capacitance value of the capacitive sensing unit, the water leakage between the gate plate (102) and the gate door frame (101) is monitored.

10. A method for monitoring water leakage of an irrigation sluice gate, wherein the front side (10201) of the gate plate is in a water environment, and the method adopts the irrigation sluice gate water leakage monitoring device as claimed in any one of claims 6 to 8 for monitoring, wherein: Specifically, water leaks between the bottom end of the gate plate (102) and the bottom frame (10102) in the gate door frame (101), or water leaks between one side end of the gate plate (102) and the vertical frame (10101) in the gate door frame (101), so that water on the front side (10201) of the gate plate is connected to water on the back side (10202) of the gate plate, and the dielectric constant of the integrated dielectric changes, and the capacitance value of the integrated capacitor changes. By monitoring the change in the capacitance value of the integrated capacitor, the water leakage between the gate plate (102) and the gate door frame (101) is monitored when there is water on both the front side (10201) and the back side (10202) of the gate plate.

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