CN112963739B

CN112963739B - South-to-north water diversion and water transfer system with fault self-checking function

Info

Publication number: CN112963739B
Application number: CN202110155727.7A
Authority: CN
Inventors: 曹海涛; 柴冬梅; 李春强
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2022-10-28
Anticipated expiration: 2041-02-04
Also published as: CN112963739A

Abstract

The utility model relates to a south-to-north water diversion and water diversion system with a fault self-checking function, which relates to the technical field of water diversion engineering and comprises a south-to-north water diversion and water diversion system with a fault self-checking function, which comprises a water leakage detection device arranged at the joint of adjacent pipelines and used for detecting whether water leakage exists at the joint of the pipelines or not, if so, a prompt signal is generated; the unmanned aerial vehicle is used for acquiring image information of the position, corresponding to the ground surface, of the pipeline; the charging pile is used for charging the unmanned aerial vehicle; control module, with detection device and the unmanned aerial vehicle communication of leaking, the control module internal storage has pipeline information and fills the positional information of electric pile, and control module generates the flight instruction according to cue signal, the flight instruction is used for controlling unmanned aerial vehicle and flies to this position department that detection device corresponds that leaks according to the pipe laying route. The method and the device have the effect of reducing the influence of possible construction conditions on the pipeline.

Description

South-to-north water diversion and water transfer system with fault self-checking function

Technical Field

The application relates to the field of water transfer engineering, in particular to a water transfer system for south-to-north water transfer with a fault self-checking function.

Background

The water is delivered from the main canal of the south-to-north water diversion by the form of pipeline, hidden culvert, combined open canal, etc. and is delivered directly to each water supply target water plant or direct water supply enterprise by the water delivery pipeline or combined pump station, and the water supply areas mainly comprise four provinces (cities) of Henan, hebei, beijing and Tianjin.

The water delivery link is crucial in water transfer engineering, so that the monitoring of water delivery pipeline leakage and burst is an important part of daily supervision work, certain construction conditions may exist at the pipeline passing position, the construction may cause leakage or burst at the pipeline connecting position, and the construction conditions around the pipeline are generally checked by adopting a manual inspection mode when some underground water supply pipelines which are already laid and are in a commissioning state are supervised, so that the influence of construction on the pipeline is reduced, and the safety inspection effect is poor due to the periodicity of manual inspection.

Disclosure of Invention

In order to reduce the influence of possible construction conditions on the pipeline, the application provides a water transfer system with a fault self-checking function for the water transfer system from south to north.

The utility model provides a water transfer system transfers water in south water north with trouble self-checking function adopts following technical scheme:

a south-to-north water diversion water transfer system with a fault self-checking function comprises:

the water leakage detection device is arranged at the joint of the adjacent pipelines and used for detecting whether water leakage exists at the joint of the pipelines or not, and if the water leakage exists, a prompt signal is generated;

the unmanned aerial vehicle is used for collecting image information of the position, corresponding to the earth surface, of the pipeline;

the charging pile is used for charging the unmanned aerial vehicle;

control module, with detection device and the unmanned aerial vehicle communication of leaking, the control module internal storage has pipeline information and fills the positional information of electric pile, and control module generates the flight instruction according to cue signal, the flight instruction is used for controlling unmanned aerial vehicle and flies to this position department that detection device corresponds that leaks according to the pipe laying route.

Through adopting above-mentioned technical scheme, if the detection device that leaks detects the pipe connection department condition of oozing, then send flight instruction according to the position of this detection device that leaks's infiltration department through control module, unmanned aerial vehicle is to the junction of infiltration pipeline, judge whether there is the construction along the way in the pipeline, if, then the staff judges probably to cause the pipeline problem for the construction, if do not exist, then need repair or change the pipeline infiltration department, through in time to the other construction condition that exists of pipeline investigate, can reduce the construction and lead to the fact the possibility of more serious damage to the pipeline.

In addition, because unmanned aerial vehicle's airspeed and flight area for it can the quick response flight instruction and reach pipeline leakage department, in the region that some staff are difficult for getting into, can reach pipeline leakage department fast, reaches quick response's effect.

Optionally, the water diversion system further comprises:

the vibration detection device is arranged at the pipeline setting position and used for collecting vibration intensity information of the environment around the pipeline;

the control module is further used for receiving the vibration intensity information, comparing the vibration intensity information with the reference intensity information, and generating a flight instruction if the vibration intensity information is larger than the reference intensity information.

Through adopting above-mentioned technical scheme, if the vibration intensity information of pipeline junction soil is greater than benchmark intensity information, then explain near pipeline probably has the construction this moment, control module sends flight instruction, control unmanned aerial vehicle flies to this pipeline junction to gather pipeline edge image, whether the staff judges that whether the other construction of pipeline leads to soil vibration according to the image, with the initial stage that the damage probably appears in the pipeline, effectively investigate the construction situation.

Optionally, the water leakage detecting device includes:

the soil humidity sensors are used for generating a first signal when soil humidity information detected by the soil humidity sensors is larger than reference humidity information for each soil humidity sensor;

and the processor is in wireless communication with each soil humidity sensor and is used for acquiring the number of the first signals, judging whether the number of the first signals is greater than the reference number, if so, generating invalid signals, and if not, generating prompt signals.

Through adopting above-mentioned technical scheme, stretch into soil moisture sensor's probe and connecting wire to the pipeline side of laying in advance, if the infiltration appears in the pipeline, then soil moisture sensor detects the other soil moisture of pipeline great, if soil moisture information is greater than benchmark humidity information, then generate first signal, explain this pipeline junction probably has the infiltration, if the number of the first signal of coexistence is greater than the benchmark number, then explain this region probably has irrigation or rainfall, can ignore the great condition of current near pipeline soil moisture this moment.

Optionally, the processor is further configured to determine whether an irrigation instruction exists, determine an irrigation area according to the irrigation instruction if the irrigation instruction exists, determine a soil humidity sensor belonging to the irrigation area, and use the soil humidity sensor as an invalid sensor;

the invalid sensor generates a second signal when a water leak is detected within a threshold time period.

Through adopting above-mentioned technical scheme, if there is the irrigation instruction, then make the soil moisture information that makes the soil moisture sensor output in the irrigation zone territory all be greater than benchmark humidity information, and not be located the soil moisture sensor in the irrigation instruction, then can continue to detect whether the pipeline has the infiltration condition.

In the alternative,

the water transfer system further comprises a hollow insertion rod, the detection line of the soil humidity sensor is arranged in the insertion rod, the insertion rod is inserted into the ground of the pipeline connection position, and the detection end of the soil humidity sensor is fixedly arranged on the insertion rod and located above the ground.

Through adopting above-mentioned technical scheme, insert the degree of depth that the pipeline was buried underground with the inserted bar for the pipe connection is in the infiltration initial stage and can senses the change of soil moisture around the pipeline fast, in addition, arranges soil moisture sensor's connecting wire in the inserted bar, and soil moisture sensor's probe stretches out the inserted bar, has reached the effect of being convenient for install soil moisture sensor.

In the alternative,

the first solar charging module is arranged on the inserting rod and provides electric energy for the soil humidity sensor.

Through adopting above-mentioned technical scheme, first solar charging module has reached energy-conserving effect for soil moisture sensor power supply, through the conversion of the energy.

Through adopting above-mentioned technical scheme, first solar charging module is the power supply of soil moisture sensor, through the conversion of the energy, has reached energy-conserving effect.

In the alternative,

and the detection end of the water leakage detection device transmits a standby signal to the control module at a preset frequency.

By adopting the technical scheme, the water leakage detection device sends the standby signal at the preset frequency interval, so that the control module can judge whether the water leakage detection device is in a normal working state or not, and can also judge the power supply condition of the water leakage detection device.

In the alternative,

fill electric pile for solar charging stake for with solar energy conversion for the required electric energy of unmanned aerial vehicle.

Through adopting above-mentioned technical scheme, adopt solar charging stake to continue a journey the power supply for unmanned aerial vehicle, reached energy conversion and energy utilization's effect.

In the alternative,

the detection device that leaks includes waterproof layer, detection line and the detection module that leaks, and the waterproof layer is fixed to be set up on the periphery wall of pipe connection department, and the detection line is double-stranded insulated wire, and the sense terminal setting of detection line is in the waterproof layer, and the outer end of detection line stretches out ground and is connected with the detection module that leaks, and the waterproof layer is waterproof material.

Through adopting above-mentioned technical scheme, before laying the pipeline, at first enclose the waterproof layer in the periphery of pipeline, the both ends of waterproof layer are sealed, the sense terminal of detection line stretches into in the sealed space that waterproof layer inner wall and pipeline outer wall formed, when the seepage appears in the pipeline, the liquid of seepage flows along the clearance between pipeline and the waterproof layer, when the sense terminal contact of liquid and detection line, short circuit circular telegram between the two strands of insulated wire of detection line, control module detects turn-on signal, can learn this section pipeline seepage condition appear.

In the alternative,

the detection end of detection line includes first detection line and second detection line, and the length that the waterproof layer was stretched into to first detection line is greater than the length that the waterproof layer was stretched into to the second detection line, and first detection line includes first metal wire and the first insulating layer of parcel in the first metal wire outside, and first detection line includes first metal wire and first insulating layer, and first metal wire includes second metal wire and the second insulating layer of parcel in the second metal wire outside, and first metal wire is relative with the second insulating layer.

By adopting the technical scheme, the first metal wire can only be opposite to the insulation part of the second detection line, and the metal wire of the second detection line exceeds the first metal wire, so that the first metal wire and the second metal wire are not easy to touch and short-circuit in the waterproof layer, and the misjudgment rate is reduced.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the function of timely checking the construction conditions around the pipeline at the initial stage of water seepage of the pipeline is realized through the water leakage detection device, the unmanned aerial vehicle, the charging pile and the control module;

2. the vibration sensor realizes the function of effectively checking the construction condition near the pipeline at the early stage of possible leakage or damage of the pipeline;

3. through adopting insertion rod and first module of charging, realized being convenient for install the function near the pipeline of having laid with the detection device that leaks.

Drawings

FIG. 1 is a block diagram of a system according to embodiment 1 of the present application;

FIG. 2 is a schematic view showing the positional relationship between the soil moisture sensor, the insertion rod and the pipe in example 1 of the present application;

fig. 3 is a schematic view showing the positional relationship between the protruding waterproof layer and the pipe in example 2 of the present application;

FIG. 4 is a partial three-dimensional schematic diagram of a highlighted detection line structure in embodiment 2 of the present application.

Description of reference numerals: 1. a pipeline; 2. a water leakage detection device; 21. a soil humidity sensor; 211. a connecting wire; 2111. a probe; 212. a solar charging module; 22. a plug-in rod; 3. detecting lines; 31. a first detection line; 311. a first metal line; 312. a first insulating layer; 32. a second detection line; 321. a second metal line; 322. a second insulating layer; 4. a vibration sensor; 5. an unmanned aerial vehicle; 6. charging piles; 7. and a waterproof layer.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The road junction is in the infiltration initial stage because the infiltration volume is less, feedback data change on 1 pressure information of pipeline and 1 flow information of pipeline is less, therefore be difficult for discovering, and the infiltration is probably because the not enough of 1 self bearing capacity of pipeline, still probably because 1 side construction of pipeline leads to soil to sink and then cause pipeline 1 to subside and arouse the infiltration, in some farmland/arable land, the staff need regularly patrol and examine pipeline 1, because the difference of crop kind, and the crop is at the altitude variation of different growth periods, the work of patrolling and examining for the staff entering farmland has brought inconveniently, if there is the construction conditions by 1 pipeline simultaneously, if illegally drawing sand and probably constructing at night, and the staff is patrolled and examined the nature inconvenient, also lead to the construction conditions difficult in time to be discover and prevent.

The embodiment of the application discloses a water transfer system for north-south water transfer with a fault self-checking function.

Example 1

Referring to fig. 1, the south-to-north water diversion and water transfer system with the fault self-checking function comprises a water leakage detection device 2, an unmanned aerial vehicle 5, a charging pile 6 and a control module, wherein the water leakage detection device 2 is arranged at the joint of adjacent pipelines 1 and used for detecting whether water leakage exists at the joint of the pipelines 1 or not, if water leakage exists, a prompt signal is generated, the unmanned aerial vehicle 5 is used for acquiring image information of the position, corresponding to the ground surface, of the pipeline 1, and the charging pile 6 is used for charging the unmanned aerial vehicle 5; control module and the communication of detection device 2 and unmanned aerial vehicle 5 that leak, the storage has 1 information on the pipeline and fills the positional information of electric pile 6 in the control module, and control module generates the flight instruction according to cue signal, and the flight instruction is used for controlling unmanned aerial vehicle 5 and lays the route according to pipeline 1 and flies to the position department that this detection device 2 that leaks corresponds. If the water leakage detection device 2 detects that the water seepage situation occurs at the joint of the pipeline 1, the control module sends a flight instruction according to the position of the water leakage detection device 2, and the unmanned aerial vehicle 5 goes to the joint of the water seepage pipeline 1 to judge whether the pipeline 1 is constructed along the road; the unmanned aerial vehicle 5 can keep the all-day-system working state, namely can respond at any time, and can reduce the possibility that construction causes more serious damage to the pipeline 1 by checking whether the construction condition exists beside the pipeline 1 in time; in addition, the flying height of the unmanned aerial vehicle 5 enables the unmanned aerial vehicle to pass through the upper side of crops so as to replace inconvenience of a manual inspection mode.

Referring to fig. 2, since a part of the water pipes 1 are pre-laid pipes 1, which are usually buried 2-3 meters below the ground, and the pipe 1 detection device is newly excavated and installed, which has a huge work load, in order to effectively detect the water seepage at the joints of the laid pipes 1, the water seepage detection device 2 provided in the embodiment of the present invention includes a plurality of soil moisture sensors 21 and a processor, the soil moisture sensors 21 employ the FDR frequency domain reflection principle, a frequency domain reflectometer is an instrument for measuring soil moisture, which measures the apparent dielectric constant of soil according to the propagation frequency of electromagnetic waves in a medium by using the electromagnetic pulse principle, thereby obtaining the relative water content of soil, the soil moisture sensors 21 include a connection line 211 and a probe 2111, the detection area of the probe 2111 is in a cylinder with a center probe 2111 as the center and a radius of 7cm, one or more probes 2111 and connection lines 211 can be provided at the joints of each adjacent pipe 1, and when the soil moisture information detected by the soil moisture sensors 21 is greater than the reference moisture information, a first signal is generated.

The processor is used for communicating with each soil humidity sensor 21 in a wireless mode, and is used for acquiring the number of the first signals, judging whether the number of the first signals is larger than the reference number, if so, generating invalid signals, and if the number of the first signals is smaller than the reference number, generating prompt signals. Since the plurality of soil moisture sensors 21 may detect water infiltration at the same time or within the same time period during the rainfall condition or the irrigation period, the area may be subjected to non-response processing, that is, when the first signal exists in the area, the drone 5 does not execute the flight instruction.

The processor is also used for judging whether an irrigation instruction exists or not, if so, determining an irrigation area according to the irrigation instruction, judging the soil humidity sensor 21 belonging to the irrigation area and taking the soil humidity sensor 21 as an invalid sensor; the invalid sensor generates a second signal when a water leak is detected within a threshold time period. If an irrigation instruction exists, the soil humidity information output by the soil humidity sensor 21 in the irrigation area is enabled to be larger than the reference humidity information, and the soil humidity sensor 21 which is not located in the irrigation instruction can continuously detect whether the water seepage condition exists in the pipeline 1.

Referring to fig. 2, since the joint of the pipe 1 is buried 2 to 3 meters below the ground, a worker can drill a hole and then bury the probe 2111 and the connecting wire 211, and in order to facilitate the worker to adjust the position of the probe 2111 according to the detection data, the water diversion system provided in the embodiment of the present application further includes a plug-in rod 22, the plug-in rod 22 is hollow, the detection line 3 of the soil humidity sensor 21 is disposed in the plug-in rod 22, the plug-in rod 22 is inserted in the ground at the joint of the pipe 1, the detection end of the soil humidity sensor 21 is fixedly disposed on the plug-in rod 22 and above the ground, a first solar charging module 212 is disposed above the plug-in rod 22, and the first solar charging module 212 provides electric energy for the soil humidity sensor 21. The inserting rod 22 is inserted into the buried depth of the pipeline 1, the inserting rod 22 can be inserted into soil below the joint of the pipeline 1 in the inclined inserting direction, so that the change of the soil humidity around the pipeline 1 can be quickly sensed at the early stage of water seepage at the joint of the pipeline 1, and the probe 2111 of the soil humidity sensor 21 extends out of the inserting rod 22 to be contacted with the soil; the first solar charging module 212 supplies power to the soil humidity sensor 21, and achieves the effect of energy conservation through energy conversion.

Because the solar power supply mode may be affected by weather and the power supply is unstable, the water leakage detection device 2 provided in the embodiment of the present application transmits the standby signal to the control module at the preset frequency, and the water leakage detection device 2 transmits the standby signal at the preset frequency interval, so that the control module can conveniently judge whether the control module is in a normal working state, and can also judge the power supply condition of the power supply.

Referring to fig. 2, in order to further prevent the influence caused by the construction situation, the water diversion system provided in the embodiment of the present application further includes a vibration detection device, which is provided at the location where the pipeline 1 is provided, and is used for collecting vibration intensity information of the environment around the pipeline 1; the control module is further used for receiving the vibration intensity information, comparing the vibration intensity information with the reference intensity information, and generating a flight instruction if the vibration intensity information is larger than the reference intensity information. If the vibration intensity information of 1 junction soil of pipeline is greater than benchmark intensity information, then explain that there may be the construction near 1 pipeline of pipeline this moment, control module sends the flight instruction, and control unmanned aerial vehicle 5 flies to this 1 junction of pipeline to gather 1 pipeline image along the line, whether the staff judges that 1 side of pipeline has the construction to lead to the soil vibration according to the image, with the initial stage that the damage probably appears in pipeline 1, effectively investigate the construction situation.

The implementation principle of the embodiment 1 of the application is as follows: in non-rainwater weather and non-irrigation periods, when soil humidity information beside the joint of the pipeline 1 detected by the soil humidity sensor 21 is larger than reference humidity information, or when the vibration detection device detects that the vibration intensity information of soil near the pipeline 1 is larger than the reference intensity information, it is indicated that water seepage or damage possibly exists at the joint of the pipeline 1, at the moment, the unmanned aerial vehicle 5 flies to the joint of the pipeline 1 according to a flight instruction to judge an image along the pipeline 1, and if a worker judges that a construction condition exists in the acquired image, the construction condition can be timely stopped, and the pipeline 1 is timely repaired; in rainy weather, then need not to start unmanned aerial vehicle 5 according to the detection device 2 that leaks in rainfall area and the irrigation zone territory.

Example 2

Referring to fig. 3, the difference between this application embodiment and embodiment 1 lies in that, the detection device 2 that leaks includes waterproof layer 7, detection line 3 and the detection module that leaks, and waterproof layer 7 is fixed to be set up on the periphery wall of pipeline 1 junction, and detection line 3 is double-stranded insulated wire, and detection line 3's sense terminal sets up in waterproof layer 7, and detection line 3's outer end stretches out ground and is connected with the detection module that leaks, and waterproof layer 7 is waterproof material. Before laying pipeline 1, at first enclose waterproof layer 7 in pipeline 1's periphery, waterproof layer 7's both ends are sealed, the sense terminal of detection line 3 stretches into in the sealed space of waterproof layer 7 inner wall and the formation of pipeline 1 outer wall, when the seepage appears in pipeline 1, the liquid of seepage flows along the clearance between pipeline 1 and waterproof layer 7, when the sense terminal contact of liquid and detection line 3, short circuit circular telegram between two strands of insulated wire of detection line 3, control module detects turn-on signal, can learn that this section pipeline 1 the seepage condition appears.

Referring to fig. 4, the sensing terminal of the sensing wire 3 includes a first sensing wire 313 and a second sensing wire 323, the length of the first sensing wire 313 extending into the waterproof layer 7 is greater than the length of the second sensing wire 323 extending into the waterproof layer 7, the first sensing wire 313 includes a first metal wire 311 and a first insulating layer 312 wrapped outside the first metal wire 311, the first sensing wire 313 includes the first metal wire 311 and the first insulating layer 312, the first sensing wire 313 includes a second metal wire 321 and a second insulating layer 322 wrapped outside the second metal wire 321, and the first metal wire 311 is opposite to the second insulating layer 322. The first metal wire 311 can only face the insulation position of the second detection line 323, and the metal wire of the second detection line 323 exceeds the first metal wire 311, so that the first metal wire 311 and the second metal wire 321 are not easy to touch and short-circuit in the waterproof layer 7, and the misjudgment rate is reduced.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A south-to-north water diversion and water regulation system with a fault self-checking function is characterized by comprising:

the water leakage detection device (2) is arranged at the joint of the adjacent pipelines (1) and is used for detecting whether water leakage exists at the joint of the pipelines (1) or not, and if the water leakage exists, a prompt signal is generated;

the unmanned aerial vehicle (5) is used for acquiring image information of the position, corresponding to the earth surface, of the pipeline (1);

the charging pile (6) is used for charging the unmanned aerial vehicle (5);

the control module is communicated with the water leakage detection device (2) and the unmanned aerial vehicle (5), the control module is internally stored with pipeline (1) information and position information of the charging pile (6), the control module generates a flight instruction according to the prompt signal, and the flight instruction is used for controlling the unmanned aerial vehicle (5) to fly to a position corresponding to the water leakage detection device (2) according to a laying path of the pipeline (1);

the water leakage detection device (2) comprises: a plurality of soil moisture sensors (21) and a processor, wherein for each soil moisture sensor (21), when soil moisture information detected by the soil moisture sensor (21) is greater than reference moisture information, a first signal is generated; the processor is in wireless communication with each soil humidity sensor (21) and is used for acquiring the number of the first signals, judging whether the number of the first signals is larger than the reference number, if so, generating invalid signals, and if the number of the first signals is smaller than the reference number, generating prompt signals.

2. The south-to-north water diversion system with fault self-checking function as claimed in claim 1, further comprising:

the vibration detection device is arranged at the position where the pipeline (1) is arranged and used for acquiring vibration intensity information of the surrounding environment of the pipeline (1);

3. The south-to-north water diversion and water regulation system with fault self-checking function as claimed in claim 1,

the processor is further used for judging whether an irrigation instruction exists or not, if so, determining an irrigation area according to the irrigation instruction, judging a soil humidity sensor (21) belonging to the irrigation area and taking the soil humidity sensor (21) as an invalid sensor;

the deactivation sensor generates a second signal when a water leak is detected within a threshold time period.

4. The south-to-north water diversion and water regulation system with fault self-checking function as claimed in claim 1,

the water transfer system further comprises a plug rod (22), the plug rod (22) is hollow inside, the detection line (3) of the soil humidity sensor (21) is arranged in the plug rod (22), the plug rod (22) is inserted into the ground at the joint of the pipelines (1), and the detection end of the soil humidity sensor (21) is fixedly arranged on the plug rod (22) and located above the ground.

5. The south-to-north water diversion and water regulation system with fault self-checking function as claimed in claim 4,

the plug rod (22) is provided with a first solar charging module (212), and the first solar charging module (212) provides electric energy for the soil humidity sensor (21).

6. The south-to-north water diversion and water regulation system with fault self-checking function as claimed in claim 1,

and the detection end of the water leakage detection device (2) transmits a standby signal to the control module at a preset frequency.

7. The south-to-north water diversion and water diversion system with the fault self-checking function as claimed in claim 1, wherein the charging pile (6) is a solar charging pile (6) for converting solar energy into electric energy required by the unmanned aerial vehicle (5).

8. The south-to-north water diversion and water regulation system with the fault self-checking function according to claim 1, wherein the water leakage detection device (2) comprises a waterproof layer (7), a detection line (3) and a water leakage detection module, the waterproof layer (7) is fixedly arranged on the peripheral wall of the joint of the pipeline (1), the detection line (3) is a double-strand insulated wire, the detection end of the detection line (3) is arranged in the waterproof layer (7), the outer end of the detection line (3) extends out of the ground to be connected with the water leakage detection module, and the waterproof layer (7) is made of waterproof materials.

9. The north-south water diversion and water regulation system with the fault self-checking function as claimed in claim 8, wherein the detection ends of the detection lines (3) comprise a first detection line (31) and a second detection line (32), the length of the first detection line (31) extending into the waterproof layer (7) is greater than the length of the second detection line (32) extending into the waterproof layer (7), the first detection line (31) comprises a first metal line (311) and a first insulating layer (312) wrapping the first metal line (311), the first detection line (31) comprises a first metal line (311) and a first insulating layer (312), the first detection line (31) comprises a second metal line (321) and a second insulating layer (322) wrapping the second metal line (321), and the first metal line (311) is opposite to the second insulating layer (322).