Automatic leakage detection system and method for bottom anti-seepage system of landfill

Abstract

The present invention relates to an automatic leakage detection system for a landfill bottom anti-seepage system, comprising: a chassis, a running device, two triangular detection wheels, a conductive solution storage box, and an electric potential detection component. The running device is arranged below the chassis to drive the chassis to move; the two triangular detection wheels are connected below the chassis through springs, and the triangular detection wheels include: a triangular body, plain porcelain corners arranged at three corner positions of the triangular body, and three conductive components extending from the center position of the triangular body to the corner positions; the conductive solution storage box is arranged on the chassis and connected to the solution inlet of the triangular body through a liquid infusion pipeline; the electric potential detection component is connected to the conductive components of the two triangular detection wheels through a wire. The automatic leakage detection system can reduce the workload of manual detection and the detection cost, and provides a guarantee for the standardized management of the leakage detection procedure of the anti-seepage layer of the landfill.

Description

Technical Field

[0001] The invention relates to the technical field of environmental engineering, and in particular to an automatic leakage detection system and method for a bottom anti-seepage system of a garbage landfill. Background Art

[0002] At present, the main method of garbage disposal in my country is still landfill. Due to the high organic content of domestic garbage in my country, a large amount of leachate will be produced during the long-term landfill process. The anti-seepage system at the bottom of the landfill is usually a composite system composed of high-density polyethylene film (HDPE), bentonite cushion and other materials. When intact, it can effectively prevent the leachate from seeping into the soil below. However, due to the laying of the HDPE membrane and the leachate drainage layer on it, it is very easy to cause damage to the HDPE membrane. If it is not discovered and repaired in time, the leaky HDPE membrane will cause the leachate to leak into the nearby soil, causing serious ecological pollution. Therefore, it is particularly important to test the HDPE membrane before the operation of the landfill.

[0003] At present, the main method for testing the HDPE membrane under the drainage layer of landfill leachate before operation in my country is to use a handheld dipole detection rod to perform testing along a pre-set detection route. This method is difficult to accurately control the detection route, the degree of uniformity of the detection point spacing is low, and it is difficult to standardize the detection procedure. In addition, this method is easily affected by factors such as on-site conditions and the quality of detection personnel, resulting in low accuracy in vulnerability positioning, and prominent cases of false detection and missed detection. Summary of the invention

[0004] The present application provides an automated leakage detection system and method for the bottom anti-seepage system of a landfill, which solves or partially solves the technical problems that the prior art is easily affected by factors such as on-site conditions and the quality of detection personnel, resulting in low accuracy in leak positioning, prominent false detections, and missed detections; it achieves the purpose of reducing the workload of manual detection and lowering detection costs, and provides a guarantee for the standardized management of leakage detection procedures for the anti-seepage layer of a landfill.

[0005] The present application provides an automatic leakage detection system for the bottom anti-seepage system of a landfill, comprising: a chassis, a running device, two triangular detection wheels, a conductive solution storage box, and a potential detection component, wherein:

[0006] The running device is arranged under the chassis to drive the chassis to move;

[0007] The two triangular detection wheels are connected to the bottom of the chassis through springs. The triangular detection wheels include: a triangular body, a plain porcelain corner arranged at the three corner positions of the triangular body, and three conductive parts extending from the center position of the triangular body to the corner positions. The triangular body is provided with three solution delivery channels; one end of the solution delivery channel is connected to the solution inlet located at the center position of the triangular body, and the other end extends into the plain porcelain corner; the plain porcelain corner is provided with a cavity for containing a conductive solution;

[0008] The conductive solution storage box is arranged on the chassis and is connected to the solution inlet of the triangle body through a liquid infusion pipeline; the conductive solution storage box delivers the conductive solution to the cavity of the plain porcelain corner through the liquid infusion pipeline and the solution delivery channel;

[0009] The potential detection component is connected to the conductive components of the two triangular detection wheels through wires to obtain the potential difference between the two triangular detection wheels.

[0010] Preferably, a connecting tube sleeved on the infusion pipeline is provided at the center of the triangular detection wheel; a bearing is sleeved on the connecting tube, the outer ring of the bearing is connected to a rod, and the rod is connected to the bottom of the chassis through the spring.

[0011] Preferably, the conductive component is a conductive copper rod; the conductive solution is a solution of CuSO4·5H2O crystals; and the solution of CuSO4·5H2O crystals can seep out from the plain porcelain corner.

[0012] Preferably, a peristaltic pump is provided on the infusion pipeline between the conductive solution storage box and the triangular body.

[0013] Preferably, the running device comprises: a battery, a drive motor, a transmission shaft, a steering gear and wheels.

[0014] The battery is connected to the steering gear and the drive motor to form a running drive circuit;

[0015] The transmission shaft is rotatably arranged below the chassis;

[0016] The wheel is arranged on the transmission shaft;

[0017] The steering gear is connected to the wheels to control the direction of the wheels;

[0018] The output end of the driving motor is connected to the transmission shaft to drive the transmission shaft to rotate.

[0019] Preferably, the device further comprises a controller connected to the potential detection component and receiving the potential difference information sent by the potential detection component.

[0020] Preferably, it further includes a laser radar module and an inertial module, wherein the laser radar module is used to construct an environmental map of the inspected area of ​​the landfill and determine the position of the running device; the inertial module is used to determine the orientation of the running device; the laser radar module and the inertial module are electrically connected to the controller to send the position information and orientation information of the running device to the controller; the controller is electrically connected to the running drive circuit to control the running drive circuit according to the position information and orientation information of the running device, thereby controlling the start and stop of the drive motor, the rotation speed and the steering of the steering gear.

[0021] Preferably, the data processing module of the controller is set with a charging warning value. When the battery power is lower than the charging warning value, the data processing module sets a planned route for the running device from the current position to the charging device according to the position information and orientation information of the running device, so that the running device moves along the planned route to the charging device position.

[0022] Based on the same inventive concept, the present application also provides a method for automatically detecting leakage of a landfill bottom anti-seepage system, which is implemented by the automatic detection system for leakage of a landfill bottom anti-seepage system, and includes the following steps:

[0023] Construct an environmental map of the inspected area of ​​the landfill through the LiDAR module;

[0024] An under-membrane electrode is arranged under the impermeable layer of the landfill, and an upper-membrane electrode is arranged on the impermeable layer; the under-membrane electrode is connected to the negative electrode of the high-voltage generator; and the upper-membrane electrode is connected to the positive electrode of the high-voltage generator;

[0025] Before testing, water is sprinkled on the surface of the leachate inverted layer in the tested area, and the high voltage generator is turned on and adjusted to a set voltage;

[0026] The inspected area is divided into a plurality of sub-areas, and a plurality of radial detection lines are marked with the electrodes on the membrane as the center, and the traveling device moves along the radial detection lines to complete the detection of all sub-areas;

[0027] Preferably, during the detection process, the position and orientation of the running device are controlled in real time by using a laser radar module and an inertial module through a local planning algorithm; the potential detection component automatically records the potential difference measured by the front and rear two triangular detection wheels, and when the polarity of the potential difference between the two triangular detection wheels is reversed, the running device stops moving, and the projection of the midpoint of the line connecting the two triangular detection wheels on the leachate drainage layer is the suspected leakage point; the running device drives the potential detection component to repeat the measurement at the suspected leakage point and the surrounding area, and when the polarity of the potential difference appears again is reversed, the suspected leakage point is determined to be the leakage point.

[0028] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0029] The present application sets up an automatic leakage detection system consisting of a chassis, a running device, two triangular detection wheels, a conductive solution storage box, and a potential detection component. During the running process, the triangular detection wheel at the bottom of the running device rotates immediately, and the front and rear triangular detection wheels are connected to the chassis through springs to ensure that each corner point can fully contact the leachate guide layer during the rolling of the triangular detection wheel. The ends of each corner point of the triangular detection wheel are plain porcelain corner structures, and the conductive solution inside is supplied by a conductive solution storage box set on the chassis. During the detection process, the electrical signal is transmitted to the potential detection component through the built-in conductive copper rod, and then the controller performs data processing. During the slow movement of the traveling device, the potential detection component automatically records the potential difference measured by the front and rear triangular detection wheels. When the polarity of the front and rear triangular detection wheels is reversed, the traveling device stops moving. The projection of the midpoint of the line connecting the two triangular detection wheels on the leachate drainage layer is the suspected leakage point. The traveling device drives the potential detection component to repeat the measurement at the suspected leakage point and the surrounding area. The point of polarity reversal that appears again is determined to be the leakage point. In this way, the technical problem that the existing technology is easily affected by factors such as on-site conditions and the quality of detection personnel, resulting in low accuracy of vulnerability positioning, prominent false detection and missed detection, is solved or partially solved; the purpose of reducing manual detection workload and reducing detection costs is achieved, and a guarantee is provided for the standardized management of leakage detection procedures for the anti-seepage layer of landfills. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A top view of the structure of an automatic leakage detection system for a landfill bottom anti-seepage system provided in an embodiment of the present application;

[0032] Figure 2 A structural front view of an automatic leakage detection system for a landfill bottom anti-seepage system provided in an embodiment of the present application;

[0033] Figure 3 A schematic diagram of the structure of the triangulation detection wheel provided in an embodiment of the present application.

[0034] (The components represented by the reference numerals in the accompanying drawings are: 1 chassis; 2 peristaltic pump; 3 conductive solution storage box; 4 battery; 5 drive motor; 6 triangular detection wheel; 61 triangular body; 62 porcelain angle; 63 conductive component; 64 solution delivery channel; 7 controller; 8 wheel; 9 inertial module; 10 spring; 11 laser radar module; 12 bearing; 13 potential detection component) DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] See attached Figures 1-2 The present application provides an automatic leakage detection system for the bottom anti-seepage system of a landfill, comprising: a chassis 1, a running device, two triangular detection wheels 6, a conductive solution storage box 3, and a potential detection component 13, wherein:

[0037] The running device is arranged under the chassis 1 to drive the chassis 1 to move; the two triangular detection wheels 6 are connected to the bottom of the chassis 1 through springs 10, see the attached Figure 3 The triangular detection wheel 6 comprises: a triangular body 61, a plain porcelain corner 62 arranged at three corners of the triangular body 61, and three conductive parts 63 extending from the center of the triangular body 61 to the corners. The triangular body 61 is provided with three solution delivery channels 64; one end of the solution delivery channel 64 is connected to the solution inlet at the center of the triangular body 61, and the other end extends into the plain porcelain corner 62; the plain porcelain corner 62 is provided with a cavity for containing a conductive solution. The spring 10 can ensure that each plain porcelain corner 62 can fully contact with the leachate drainage layer during the rolling process of the triangular detection wheel 6.

[0038] The conductive solution storage box 3 is arranged on the chassis 1 and is connected to the solution inlet of the triangular body 61 through an infusion pipeline; the conductive solution storage box 3 delivers the conductive solution to the cavity of the plain porcelain corner 62 through the infusion pipeline and the solution delivery channel 64; the potential detection component is connected to the conductive components 63 of the two triangular detection wheels 6 through wires to obtain the potential difference between the two triangular detection wheels 6.

[0039] Furthermore, a connecting pipe sleeved on the infusion pipeline is provided at the center of the triangular detection wheel 6; a bearing 12 is sleeved on the connecting pipe, and the outer ring of the bearing 12 is connected to a rod, and the rod is connected to the bottom of the chassis 1 through a spring 10.

[0040] Further, the conductive component 63 is a conductive copper rod; the conductive solution is a solution of CuSO4·5H2O crystals; the solution of CuSO4·5H2O crystals can seep out from the plain porcelain corner 62. A peristaltic pump 2 is provided on the infusion pipeline between the conductive solution storage box 3 and the triangle body 61, and the peristaltic pump 2 is provided to ensure that the solution of CuSO4·5H2O crystals can fully contact with the plain porcelain corner 62 at all times.

[0041] Furthermore, the running device includes: a battery 4, a drive motor 5, a transmission shaft, a steering gear and a wheel 8. The battery 4 is connected to the steering gear and the drive motor 5 to form a running drive circuit. The battery 4 can be a lithium battery; the transmission shaft is rotatably arranged under the chassis 1; the wheel 8 is arranged on the transmission shaft; the steering gear is connected to the wheel 8 to control the direction of the wheel 8; the output end of the drive motor 5 is connected to the transmission shaft to drive the transmission shaft to rotate.

[0042] Furthermore, it also includes a controller 7, which is connected to the potential detection component 13 and receives the potential difference information sent by the potential detection component 13. It also includes a laser radar module 11 and an inertial module 9. The laser radar module 11 is used to construct an environmental map of the inspected area of ​​the landfill and determine the position of the running device; the inertial module 9 is used to determine the orientation of the running device, which can be a magnetometer; the laser radar module 11 and the inertial module 9 are electrically connected to the controller 7, and send the position information and orientation information of the running device to the controller 7; the controller 7 is electrically connected to the running drive circuit, and controls the running drive circuit according to the position information and orientation information of the running device, and then controls the start and stop of the drive motor 5, the speed and the steering of the steering gear. During the slow movement of the running device, each of the front and rear triangular detection wheels 6 has a plain porcelain corner 62 that contacts the leachate drainage layer at the same time, and the running speed of the running device is adjusted so that the contact time is not less than 1 second, in order to stabilize the measured potential difference data.

[0043] The data processing module of the controller 7 is set with a charging warning value. When the power level of the battery 4 is lower than the charging warning value, the data processing module sets a planned route for the running device from the current position to the charging device according to the position information and direction information of the running device, so that the running device moves along the planned route to the charging device position.

[0044] Based on the same inventive concept, the present application also provides a method for automatically detecting leakage of a landfill bottom anti-seepage system, which is implemented by an automatic detection system for leakage of a landfill bottom anti-seepage system, and includes the following steps:

[0045] S1: constructing an environmental map of the inspected area of ​​the landfill through the laser radar module 11. Specifically, the laser radar module 11 collects laser radar data in the inspected area of ​​the landfill, and uses the method of simultaneous localization and mapping (SLAM) to construct an overall environmental map of the inspected area, which is displayed in real time on the computer.

[0046] S2: A sub-membrane electrode is set under the impermeable layer of the landfill, and an upper-membrane electrode is set on the impermeable layer; the sub-membrane electrode is connected to the negative electrode of the high-voltage generator; and the upper-membrane electrode is connected to the positive electrode of the high-voltage generator.

[0047] S3: Before testing, sprinkle water on the surface of the leachate inverted layer in the tested area, turn on the high voltage generator, and adjust it to the set voltage.

[0048] S4: The inspected area is divided into several sub-areas, and multiple radial detection lines are marked with the electrodes on the membrane as the center. The traveling device moves along the radial detection lines to complete the detection of all sub-areas.

[0049] Furthermore, during the detection process of step S4, the laser radar module 11 and the inertial module 9 are used to control the position and orientation of the running device in real time through a local planning algorithm; the potential detection component 13 automatically records the potential difference measured by the front and rear two triangular detection wheels 6. When the polarity of the potential difference between the two triangular detection wheels 6 is reversed, the running device stops moving, and the projection of the midpoint of the line connecting the two triangular detection wheels 6 on the leachate drainage layer is the suspected leakage point; the running device drives the potential detection component 13 to repeat the measurement at the suspected leakage point and the surrounding area. When the polarity of the potential difference is reversed again, the suspected leakage point is determined to be the leakage point.

[0050] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for automatically detecting leakage of a landfill bottom anti-seepage system, characterized in that: The method is applied to an automatic leakage detection system for a landfill bottom anti-seepage system, the system comprising: a chassis, a running device, two triangular detection wheels, a conductive solution storage box, and a potential detection component, wherein: The running device is arranged under the chassis to drive the chassis to move; The two triangular detection wheels are connected to the bottom of the chassis through springs. The triangular detection wheels include: a triangular body, a plain porcelain corner arranged at the three corner positions of the triangular body, and three conductive parts extending from the center position of the triangular body to the corner positions. The triangular body is provided with three solution delivery channels; one end of the solution delivery channel is connected to the solution inlet located at the center position of the triangular body, and the other end extends into the plain porcelain corner; the plain porcelain corner is provided with a cavity for containing a conductive solution; The conductive solution storage box is arranged on the chassis and is connected to the solution inlet of the triangle body through a liquid infusion pipeline; the conductive solution storage box delivers the conductive solution to the cavity of the plain porcelain corner through the liquid infusion pipeline and the solution delivery channel; The potential detection component is connected to the conductive components of the two triangular detection wheels through wires to obtain the potential difference between the two triangular detection wheels; Wherein, a connecting pipe sleeved on the infusion pipeline is arranged at the center of the triangular detection wheel; a bearing is sleeved on the connecting pipe, the outer ring of the bearing is connected to a rod, and the rod is connected to the bottom of the chassis through the spring; During the detection process, the laser radar module and the inertial module are used to control the position and orientation of the running device in real time through the local planning algorithm; the potential detection component automatically records the potential difference measured by the front and rear two triangular detection wheels. When the polarity of the potential difference between the two triangular detection wheels is reversed, the running device stops moving, and the projection of the midpoint of the line connecting the two triangular detection wheels on the leachate drainage layer is the suspected leakage point; the running device drives the potential detection component to repeat the measurement at the suspected leakage point and the nearby area. When the polarity of the potential difference is reversed again, the suspected leakage point is determined to be the leakage point.

2. The automatic leakage detection method for the bottom anti-seepage system of a landfill as claimed in claim 1, characterized in that: The conductive component is a conductive copper rod; the conductive solution is a solution of CuSO4.5H2O crystals; the solution of CuSO4.5H2O crystals can seep out from the plain porcelain corner.

3. The automatic detection method for leakage of the bottom anti-seepage system of a landfill as claimed in claim 1, characterized in that: A peristaltic pump is arranged on the infusion pipeline between the conductive solution storage box and the triangular body.

4. The automatic detection method for leakage of the bottom anti-seepage system of a landfill as claimed in claim 1, characterized in that: The running device includes: a battery, a drive motor, a transmission shaft, a steering gear and wheels. The battery is connected to the steering gear and the drive motor to form a running drive circuit; The transmission shaft is rotatably arranged below the chassis; The wheel is arranged on the transmission shaft; The steering gear is connected to the wheels to control the direction of the wheels; The output end of the driving motor is connected to the transmission shaft to drive the transmission shaft to rotate.

5. The automatic leakage detection method for the bottom anti-seepage system of a landfill as claimed in claim 4, characterized in that: It also includes a controller connected to the potential detection component and receiving the potential difference information sent by the potential detection component.

6. The automatic leakage detection method for the bottom anti-seepage system of a landfill as claimed in claim 5, characterized in that: It also includes a laser radar module and an inertial module. The laser radar module is used to construct an environmental map of the inspected area of ​​the landfill and determine the position of the running device; the inertial module is used to determine the direction of the running device; the laser radar module and the inertial module are electrically connected to the controller to send the position information and direction information of the running device to the controller; the controller is electrically connected to the running drive circuit to control the running drive circuit according to the position information and direction information of the running device, thereby controlling the start and stop of the drive motor, the speed and the steering of the steering gear.

7. The automatic detection method for leakage of the bottom anti-seepage system of a landfill as claimed in claim 6, characterized in that: The data processing module of the controller is set with a charging warning value. When the battery power is lower than the charging warning value, the data processing module sets a planned route for the running device from the current position to the charging device according to the position information and orientation information of the running device, so that the running device moves along the planned route to the charging device position.

8. The automatic detection method for leakage of the bottom anti-seepage system of a landfill as claimed in claim 7, characterized in that: The following steps are involved: Construct an environmental map of the inspected area of ​​the landfill through the LiDAR module; An under-membrane electrode is arranged under the impermeable layer of the landfill, and an upper-membrane electrode is arranged on the impermeable layer; the under-membrane electrode is connected to the negative electrode of the high-voltage generator; and the upper-membrane electrode is connected to the positive electrode of the high-voltage generator; Before testing, water is sprinkled on the surface of the leachate inverted layer in the tested area, and the high voltage generator is turned on and adjusted to a set voltage; The inspected area is divided into several sub-areas, and a plurality of radial detection lines are marked with the electrodes on the membrane as the center. The traveling device moves along the radial detection lines to complete the detection of all sub-areas.

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