Tunnel water seepage detection system and method

Abstract

The present application provides a tunnel water seepage detection system and method, which are used to solve the problem that the detection of the moisture content of the tunnel soil layer is difficult and the real-time performance is low. It includes an inspection track and an inspection robot moving along the inspection track, and the inspection track is set on the tunnel wall; the inspection robot is provided with a power transmitting circuit, and a plurality of power receiving circuits are arranged at intervals on the tunnel wall. The power transmitting circuit and the power receiving circuit are electromagnetically coupled, and the output end of the power receiving circuit is provided with a signal detection circuit for detecting the output electrical signal; the power receiving circuit includes a plurality of electrode plate modules, and the plurality of electrode plate modules are connected to the power receiving circuit through a control switch, and the plurality of electrode plate modules are embedded and installed in the soil layer of the tunnel wall. The present application realizes the detection of soil moisture content at different positions through the mathematical relationship between the moisture content and the capacitance value of the electrode plate module, and the inspection operation is less difficult and the real-time performance of the inspection data is high.

Description

Technical Field

[0001] The invention relates to the technical field of pipelines, and in particular to a tunnel water seepage detection system and method. Background Art

[0002] Tunnel detection can provide important theoretical support for the daily maintenance of tunnels, especially the detection data of the moisture content of the tunnel soil layer is crucial to the judgment of the health status of the tunnel. When the moisture content of the tunnel soil layer is high, the water in the soil is easy to penetrate into the tunnel concrete soil layer under the action of pressure, causing adverse consequences such as steel corrosion and tiny cracks in the concrete. Therefore, the moisture content detection of the tunnel soil layer has become the most important part of tunnel disease monitoring and tunnel risk warning.

[0003] The existing tunnel soil moisture content detection is mainly carried out by handheld X-ray detection equipment at different locations of the tunnel. During the detection, the top of the tunnel needs to be detected with the help of lifting equipment. In addition, the detection is regular, the detection frequency is low, and the real-time nature of the data is low. Summary of the invention

[0004] The purpose of the present invention is to provide a tunnel water seepage detection system and method, which are used to solve the technical problems of difficulty and low real-time performance in detecting the moisture content of the tunnel soil layer.

[0005] A tunnel water seepage detection system comprises an inspection track arranged along the length direction of the tunnel, and an inspection robot moving along the inspection track, wherein the inspection track is arranged on the tunnel wall;

[0006] The inspection robot is provided with a power transmitting circuit, and a plurality of power receiving circuits are provided at intervals on the tunnel wall. The power transmitting circuit is electromagnetically coupled with the power receiving circuit, and the output ends of the power receiving circuits are provided with signal detection circuits for detecting output electrical signals;

[0007] The electric energy receiving circuits each include a plurality of electrode plate modules, the plurality of electrode plate modules are each connected to the electric energy receiving circuit via a control switch, and the plurality of electrode plate modules are each embedded and installed in a soil layer of a tunnel wall.

[0008] Optionally, the electrode plate modules each include a first electrode plate and a second electrode plate arranged in parallel;

[0009] An insulating shell is sleeved on the outer sides of the first pole plate and the second pole plate, and the first pole plate and the second pole plate are embedded in the soil layer of the tunnel wall.

[0010] Optionally, several electrode plate modules of the same electric energy receiving circuit are respectively mounted on several arc-shaped mounting surfaces of the same section of the tunnel;

[0011] The plurality of arc-shaped mounting surfaces are parallel to the arc-shaped surface of the tunnel wall, and the plurality of electrode plate modules mounted on the same arc-shaped mounting surface are arranged at intervals.

[0012] Optionally, the electric energy receiving circuit includes a receiving coil, a rectifying and filtering circuit and a load battery;

[0013] One ends of several first pole plates of the same electric energy receiving circuit are connected in parallel, the other ends of several second pole plates are respectively connected to one ends of several control switches, the other ends of several control switches are connected in parallel, one end of the module after parallel connection is connected to one end of the receiving coil, the other end of the module after parallel connection is connected to an input end of the rectifying and filtering circuit, the other end of the receiving coil is connected to another input end of the rectifying and filtering circuit, and the output end of the rectifying and filtering circuit is connected to the load battery.

[0014] Optionally, the electric energy transmitting circuit comprises a DC power supply, an inverter circuit, an LCC compensation circuit and a transmitting coil connected in sequence;

[0015] The LCC compensation circuit includes a compensation inductor, a first compensation capacitor and a second compensation capacitor, one end of the compensation inductor is connected to an output end of the inverter circuit, the other end of the compensation inductor is connected to one end of the first compensation capacitor and then to one end of the second compensation capacitor, the other end of the first compensation capacitor is connected to the other output end of the inverter circuit and then to one end of the transmitting coil, and the other end of the second compensation capacitor is connected to the other end of the transmitting coil.

[0016] Optionally, the electric energy transmitting circuit further includes a first shell, the transmitting coil is installed in the first shell, and the first shell is installed on the inspection robot;

[0017] The electric energy receiving circuit also includes a second shell, the receiving coil is installed in the second shell, and the second shell is installed on the inner wall of the tunnel on one side of the inspection track.

[0018] Optionally, a grating transmitting module is installed on the first housing, and a grating receiving module is installed on the second housing;

[0019] When the first shell is facing the second shell, the grating receiving module is facing the grating transmitting module.

[0020] Optionally, the signal detection circuit is a current sensor, and the current sensor is used to detect the input current of the load battery.

[0021] Optionally, a central controller is also included;

[0022] The central controller communicates data with the power transmission circuit, the power transmission circuit and the signal detection circuit. The central controller determines the moisture content of the tunnel soil layer by analyzing the collected data of the signal detection circuit.

[0023] A method for detecting water seepage in a tunnel, using the above-mentioned system for detecting water seepage in a tunnel, comprises the following specific steps:

[0024] S1: Obtain the dielectric constant of the soil of the target tunnel at different moisture contents through experimental analysis, and obtain a dielectric constant data set;

[0025] S2: The central controller sends a driving control signal to drive the inspection robot to move along the inspection track. When the coupling end of the power transmitting circuit is aligned with the coupling end of the power receiving circuit to be detected, the inspection robot stops moving.

[0026] S3: The central controller sends a frequency control signal to control the output frequency of the power transmission circuit;

[0027] S4: sequentially controlling a plurality of control switches of the power receiving circuit to be detected to be connected to the circuit, and collecting output signals in real time through the signal detection circuit, and transmitting the signals to the central controller;

[0028] S5: The central controller determines the moisture content of the tunnel soil layer based on the collected output signal.

[0029] Due to the adoption of the above technical solution, the present invention has the following advantages:

[0030] 1. This application sets up several electrode plate modules and analyzes the mathematical relationship between moisture content and capacitance value of the electrode plate modules, so as to realize the detection of soil moisture content at different positions. The inspection operation is easy and the real-time inspection data is highly real-time.

[0031] 2. The present application realizes the detection of soil moisture content at several points at different positions and at different distances from the tunnel wall arc surface by setting several electrode plate modules of the same electric energy receiving circuit on several arc-shaped mounting surfaces of the same section, and arranging several electrode plate modules 3 installed on the same arc-shaped mounting surface at intervals. The inspection data is wide, and the accuracy of reflecting the moisture content of the soil layer around the tunnel is high.

[0032] 3. The present application sets a control switch to selectively connect a number of electrode plates to the electric energy receiving circuit. The soil moisture content at multiple points can be detected by coupling a single receiving coil with a single transmitting coil, and the inspection efficiency is high.

[0033] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings of the present invention are as follows.

[0035] Figure 1 It is an equivalent circuit diagram of the tunnel soil layer moisture content detection system of the present invention.

[0036] Figure 2 It is a schematic diagram of the structure of the tunnel soil layer moisture content detection system inside the tunnel of the present invention.

[0037] Figure 3 It is a schematic diagram of the cross-sectional structure of the tunnel soil layer moisture content detection system of the present invention.

[0038] Figure 4 It is a schematic structural diagram of the first shell and the second shell of the present invention.

[0039] Figure 5 For the present invention Figure 3 A partial enlarged view of point A in the middle.

[0040] In the figure: 1-inspection track; 2-inspection robot; 3-electrode plate module; 301-first electrode plate; 302-second electrode plate; 4-first shell; 5-second shell; 6-grating transmitting module; 7-grating receiving module; 8-tunnel wall. DETAILED DESCRIPTION

[0041] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0042] Embodiment 1:

[0043] like Figure 1 and Figure 2 A tunnel water seepage detection system shown includes an inspection track 1 arranged along the length direction of the tunnel, and an inspection robot 2 moving along the inspection track 1, wherein the inspection track 1 is arranged on the tunnel wall 8;

[0044] The inspection robot 2 is provided with a power transmitting circuit, and a plurality of power receiving circuits are provided at intervals on the tunnel wall 8. The power transmitting circuit is electromagnetically coupled with the power receiving circuit, and the output ends of the power receiving circuits are provided with signal detection circuits for detecting output electrical signals.

[0045] The electric energy receiving circuits each include a plurality of electrode plate modules 3 , and the plurality of electrode plate modules 3 are connected to the electric energy receiving circuit via a control switch, and the plurality of electrode plate modules 3 are embedded and installed in a soil layer of a tunnel wall 8 .

[0046] In this embodiment, the present application sets up several electrode plate modules and analyzes the mathematical relationship between the moisture content and the capacitance value of the electrode plate modules, thereby realizing the detection of soil moisture content at different positions, with low difficulty in inspection operation and high real-time inspection data. In this embodiment, several power receiving circuits are sequentially arranged along the length direction of the tunnel.

[0047] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the electrode plate module 3 includes a first electrode plate 301 and a second electrode plate 302 arranged in parallel;

[0048] The first pole plate 301 and the second pole plate 302 are both sleeved with insulating shells, and the first pole plate 301 and the second pole plate 302 are both embedded in the soil layer of the tunnel wall 8 .

[0049] In this embodiment, the first electrode plate 301 and the second electrode plate 302 are both embedded in the soil layer of the tunnel wall 8. When the soil moisture content between the first electrode plate 301 and the second electrode plate 302 changes, the dielectric constant thereof will also change accordingly, further causing the capacitance value of the electrode plate module 3 to change. The mathematical relationship between the capacitance value of the electrode plate module 3 and the output of the electric energy receiving circuit is analyzed to obtain the change in soil moisture content.

[0050] like Figure 2 and Figure 3 As shown, several electrode plate modules 3 of the same electric energy receiving circuit are respectively installed on several arc-shaped installation surfaces of the same section of the tunnel;

[0051] The arc-shaped mounting surfaces are all parallel to the arc-shaped surface of the tunnel wall 8, and the electrode plate modules 3 mounted on the same arc-shaped mounting surface are arranged at intervals.

[0052] In this embodiment, if Figure 1 and 3 As shown, a single power receiving circuit includes ten electrode plate modules 3 (C1-C 10 ), which are respectively distributed on two arc-shaped mounting surfaces (five electrode plate modules 3 are installed on each arc-shaped surface), realizing the soil moisture content detection at several points at different positions and at different distances from the arc surface of the tunnel wall 8. The inspection data is wide and the accuracy of the moisture content of the soil layer around the tunnel is high.

[0053] In this embodiment, if Figure 1 and 3As shown, a single power receiving circuit includes ten control switches (S1-S 10 ), the present application sets a control switch to selectively connect a plurality of electrode plate modules 3 to the power receiving circuit, and a single receiving coil L S With a single transmitting coil L P The coupling can realize the soil moisture detection at multiple points, and the inspection efficiency is high.

[0054] like Figure 1 As shown, the electric energy receiving circuit includes a receiving coil, a rectifying and filtering circuit and a load battery;

[0055] One end of several first pole plates 301 of the same electric energy receiving circuit is connected in parallel, the other ends of several second pole plates 302 are respectively connected to one end of several control switches, the other ends of several control switches are connected in parallel, one end of the module after parallel connection is connected to one end of the receiving coil, the other end of the module after parallel connection is connected to an input end of the rectifier and filter circuit, the other end of the receiving coil is connected to another input end of the rectifier and filter circuit, and the output end of the rectifier and filter circuit is connected to the load battery.

[0056] In this embodiment, if Figure 1 As shown, the receiving coil is L S The rectifier filter circuit is a full-bridge rectifier filter, which includes 4 diodes D1-D4 and a filter capacitor C d , the load battery is R L .

[0057] like Figure 1 , Figure 2 and Figure 3 As shown, the electric energy transmitting circuit includes a DC power supply, an inverter circuit, an LCC compensation circuit and a transmitting coil connected in sequence;

[0058] The LCC compensation circuit includes a compensation inductor, a first compensation capacitor and a second compensation capacitor, one end of the compensation inductor is connected to an output end of the inverter circuit, the other end of the compensation inductor is connected to one end of the first compensation capacitor and then to one end of the second compensation capacitor, the other end of the first compensation capacitor is connected to the other output end of the inverter circuit and then to one end of the transmitting coil, and the other end of the second compensation capacitor is connected to the other end of the transmitting coil.

[0059] In this embodiment, if Figure 1 As shown, the DC power supply is U dc The inverter circuit is a full-bridge inverter circuit, which includes 4 switch tubes Q1-Q4, and the compensation inductor is L T , the first compensation capacitor is C T and the second compensation capacitor C P , the transmitting coil is LP .

[0060] like Figure 2 , Figure 3 and Figure 4 As shown, the electric energy transmitting circuit further includes a first shell 4, the transmitting coil is installed in the first shell 4, and the first shell 4 is installed on the inspection robot 2;

[0061] The electric energy receiving circuit further comprises a second shell 5 , the receiving coil is installed in the second shell 5 , and the second shell 5 is installed on the inner wall of the tunnel at one side of the inspection track 1 .

[0062] In this embodiment, the DC power supply U dc The battery module, inverter circuit, LCC compensation circuit and transmitting coil L are installed in the shell of the inspection robot 2. P are installed in the first housing 4, and the transmitting coil L P Installed at a position close to the end surface of the first shell 4.

[0063] In this embodiment, the second shell 5 is located at the same height as the first shell 4, the receiving coil Ls and the rectifier filter circuit are both installed in the second shell 5, the receiving coil Ls and the rectifier filter circuit are electrically connected to the parallel electrode plate switch module through pre-buried insulated wires. In this embodiment, the load battery is arranged in a battery box, and the battery box can be arranged on the tunnel wall 8 or in the grooves on both sides of the tunnel.

[0064] like Figure 2 , Figure 3 and Figure 4 As shown, a grating transmitting module 6 is installed on the first housing 4, and a grating receiving module 7 is installed on the second housing 5;

[0065] When the first housing 4 is facing the second housing 5 , the grating receiving module 7 is facing the grating transmitting module 6 .

[0066] In this embodiment, when the first shell 4 and the second shell 5 are facing each other, the transmitting coil L P With receiving coil L S At this time, the transmission efficiency between the power transmitting circuit and the power receiving circuit is the highest, and at the same time, the transmitting coil L P With receiving coil L S In this embodiment, the grating transmitting module 6 transmits a grating signal during the movement of the inspection robot 2. When the grating receiving module 7 receives the grating signal, it is confirmed that the transmitting coil L P With receiving coil L S Aligned state.

[0067] like Figure 1 As shown, the signal detection circuit is a current sensor, and the current sensor is used to detect the input current of the load battery.

[0068] In this embodiment, if Figure 3 As shown, the current sensor is I S .

[0069] like Figure 1 , Figure 2 and Figure 3 As shown, a central controller is also included;

[0070] The central controller communicates data with the power transmission circuit, the power transmission circuit and the signal detection circuit. The central controller determines the moisture content of the tunnel soil layer by analyzing the collected data of the signal detection circuit.

[0071] In this embodiment, the control switch, the current sensor and the grating receiving module 7 all communicate with the central device through the remote communication module, and the remote communication module communicates with the central device through the load battery R L In this embodiment, the load battery R L The load battery R is realized by coupling between the power transmitting circuit and the power receiving circuit L Charging, DC power supply U dc The battery capacity is much larger than the load battery R L capacity.

[0072] Embodiment 2:

[0073] A method for detecting water seepage in a tunnel, using the system for detecting water seepage in a tunnel described in Example 1, and comprising the following specific steps:

[0074] S1: Obtain the dielectric constant of the soil of the target tunnel at different moisture contents through experimental analysis, and obtain a dielectric constant data set;

[0075] In this embodiment, the dielectric constants at different water contents are obtained by constructing a model in a laboratory and performing analytical measurements.

[0076] S2: The central controller sends a driving control signal to drive the inspection robot 2 to move along the inspection track 1. When the coupling end of the power transmitting circuit is aligned with the coupling end of the power receiving circuit to be detected, the inspection robot 2 stops moving.

[0077] In this embodiment, when the entire tunnel soil layer is inspected, the inspection robot 2 is driven to pass through multiple second shells 7 in sequence. When one set of inspections is completed, it moves to the next second shell 7 position to perform the next set of inspections. During the inspection, the power transmitting circuit is coupled with the power receiving circuit to realize the power supply to the load battery R. L charging.

[0078] S3: The central controller sends a frequency control signal to control the output frequency of the power transmission circuit;

[0079] In this embodiment, the output frequency f of the power transmitting circuit is set to a constant value.

[0080] S4: sequentially controlling a plurality of control switches of the power receiving circuit to be detected to be connected to the circuit, and collecting output signals in real time through the signal detection circuit, and transmitting the signals to the central controller;

[0081] In this embodiment, when the control switch S1 is turned on, the electrode plate module C1 is connected to the power receiving circuit. At this time, the control switches S2-S9 are all in the off state. At this time, the current sensor I S The collected output signal is used to calculate the moisture content at the electrode plate module C1. Similarly, the moisture content at the electrode plate module C2-C 10 The moisture content at the site.

[0082] S5: The central controller determines the moisture content of the tunnel soil layer based on the collected output signal.

[0083] In this embodiment, an expression of the output current with respect to the system parameters is constructed through circuit relationships, and the capacitance value of the electrode plate module 3 is reversely calculated through the collected current data and the system fixed parameters (output frequency parameters, compensation inductance parameters, first compensation capacitance parameters and second compensation capacitance parameters). The dielectric constant is reversely calculated based on the mathematical relationship between the capacitance value of the electrode plate module 3 and the dielectric constant, and then the dielectric constant is matched to the dielectric constant data set to obtain the moisture content of the soil.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A tunnel water seepage detection system, characterized in that: It comprises an inspection track (1) arranged along the length direction of a tunnel, and an inspection robot (2) moving along the inspection track (1), wherein the inspection track (1) is arranged on the tunnel wall; The inspection robot (2) is provided with a power transmitting circuit, and a plurality of power receiving circuits are arranged at intervals on the tunnel wall, the power transmitting circuit is electromagnetically coupled with the power receiving circuit, and the output ends of the power receiving circuits are provided with signal detection circuits for detecting output electrical signals; The electric energy receiving circuit comprises a plurality of electrode plate modules (3), the plurality of electrode plate modules (3) are connected to the electric energy receiving circuit via a control switch, and the plurality of electrode plate modules (3) are embedded and installed in a soil layer of a tunnel wall.

2. A tunnel water seepage detection system according to claim 1, characterized in that: The electrode plate modules (3) each comprise a first electrode plate (301) and a second electrode plate (302) arranged in parallel; An insulating shell is provided on the outside of the first pole plate (301) and the second pole plate (302); the first pole plate (301) and the second pole plate (302) are embedded in the soil layer of the tunnel wall.

3. A tunnel water seepage detection system according to claim 2, characterized in that: A plurality of electrode plate modules (3) of the same electric energy receiving circuit are respectively mounted on a plurality of arc-shaped mounting surfaces of the same section of the tunnel; The plurality of arc-shaped mounting surfaces are parallel to the arc-shaped surface of the tunnel wall, and the plurality of electrode plate modules (3) mounted on the same arc-shaped mounting surface are arranged at intervals.

4. A tunnel water seepage detection system according to claim 3, characterized in that: The electric energy receiving circuits all include a receiving coil, a rectifying and filtering circuit and a load battery; One end of a plurality of the first pole plates (301) of the same electric energy receiving circuit is connected in parallel, the other ends of a plurality of the second pole plates (302) are respectively connected to one end of a plurality of control switches, the other ends of the plurality of control switches are connected in parallel, one end of the module after the parallel connection is connected to one end of the receiving coil, the other end of the module after the parallel connection is connected to an input end of a rectifying and filtering circuit, the other end of the receiving coil is connected to another input end of the rectifying and filtering circuit, and the output end of the rectifying and filtering circuit is connected to a load battery.

5. A tunnel water seepage detection system according to claim 4, characterized in that: The electric energy transmitting circuit comprises a DC power supply, an inverter circuit, an LCC compensation circuit and a transmitting coil connected in sequence; The LCC compensation circuit includes a compensation inductor, a first compensation capacitor and a second compensation capacitor, one end of the compensation inductor is connected to an output end of the inverter circuit, the other end of the compensation inductor is connected to one end of the first compensation capacitor and then to one end of the second compensation capacitor, the other end of the first compensation capacitor is connected to the other output end of the inverter circuit and then to one end of the transmitting coil, and the other end of the second compensation capacitor is connected to the other end of the transmitting coil.

6. A tunnel water seepage detection system according to claim 5, characterized in that: The electric energy transmitting circuit further comprises a first shell (4), the transmitting coil is installed in the first shell (4), and the first shell (4) is installed on the inspection robot (2); The electric energy receiving circuit further comprises a second shell (5), the receiving coil is installed in the second shell (5), and the second shell (5) is installed on the inner wall of the tunnel on one side of the inspection track (1).

7. A tunnel water seepage detection system according to claim 6, characterized in that: A grating transmitting module (6) is installed on the first housing (4), and a grating receiving module (7) is installed on the second housing (5); When the first housing (4) and the second housing (5) are facing each other, the grating receiving module (7) and the grating transmitting module (6) are facing each other.

8. A tunnel water seepage detection system according to claim 1, characterized in that: The signal detection circuit is a current sensor, and the current sensor is used to detect the input current of the load battery.

9. A tunnel water seepage detection system according to claim 1, characterized in that: Also includes a central controller; The central controller communicates data with the power transmission circuit, the power transmission circuit and the signal detection circuit. The central controller determines the moisture content of the tunnel soil layer by analyzing the collected data of the signal detection circuit.

10. A method for detecting water seepage in a tunnel, characterized in that: A tunnel water seepage detection system according to any one of claims 1 to 9 is used, wherein the specific steps are as follows: S1: Obtain the dielectric constant of the soil of the target tunnel at different moisture contents through experimental analysis, and obtain a dielectric constant data set; S2: the central controller sends a driving control signal to drive the inspection robot (2) to move along the inspection track (1), and when the coupling end of the power transmitting circuit is directly opposite to the coupling end of the power receiving circuit to be detected, the inspection robot (2) stops moving; S3: The central controller sends a frequency control signal to control the output frequency of the power transmission circuit; S4: sequentially controlling a plurality of control switches of the power receiving circuit to be detected to be connected to the circuit, and collecting output signals in real time through the signal detection circuit, and transmitting the signals to the central controller; S5: The central controller determines the moisture content of the tunnel soil layer based on the collected output signal.

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