A tunnel water leakage monitoring device

By setting up a location-based leak detection line made of conductive polymer material inside the tunnel, and measuring the change in resistance value by the monitoring unit, the problem of real-time monitoring of leak points in the tunnel is solved, achieving full coverage, low cost, and real-time leak detection.

CN224518049UActive Publication Date: 2026-07-17BAO DING SHI TIAN HE DIAN ZI JI SHU YOU XIAN GONG SI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
BAO DING SHI TIAN HE DIAN ZI JI SHU YOU XIAN GONG SI
Filing Date
2025-08-05
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing technologies cannot achieve real-time monitoring of leakage points within the tunnel length. Chemical methods rely on periodic manual inspections, which are subject to delays. Video methods involve expensive equipment and harsh environments, making it difficult to achieve full coverage monitoring.

Method used

The positioning leak detection line is made of conductive polymer material with preset uniform resistance characteristics. It is set along the entire length of the tunnel. A conductive connection is formed at the leak point through water medium. The monitoring unit measures the change of resistance value to monitor the leak in real time and calculate the location.

Benefits of technology

It enables real-time, full-coverage monitoring of leak points within the tunnel length, has strong environmental adaptability, low data processing requirements, low cost, and timely detection and accurate location of leak points.

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Abstract

The application provides a tunnel water leakage monitoring device, comprising: a positioning water leakage detection line and a monitoring host; the monitoring host comprises a monitoring unit; the positioning water leakage detection line is arranged along a preset direction, the positioning water leakage detection line comprises a first conductive wire and a second conductive wire, the resistance value between the first conductive wire and the second conductive wire is a preset value, and the first conductive wire and the second conductive wire are connected through a water medium when water leaks; the monitoring unit is connected to both ends of the positioning water leakage detection line, and the monitoring unit is configured to collect the resistance value between the first conductive wire and the second conductive wire. The device covers the length range of the tunnel through the positioning water leakage detection line, and the water medium forms a conductive connection at the water leakage point, so that the device can sense the water leakage event, and the monitoring unit monitors the water leakage by measuring the resistance value change, thereby solving the problem of real-time monitoring of the water leakage point in the entire tunnel length range.
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Claims

1. A tunnel water leakage monitoring device, characterized by, include: Locating a leak detection line and a monitoring host; the monitoring host includes a monitoring unit; The positioning leak detection line is set along a preset direction. The positioning leak detection line includes a first conductive wire and a second conductive wire. The resistance value between the first conductive wire and the second conductive wire is a preset value. The first conductive wire and the second conductive wire are connected through a water medium when there is a leak. The monitoring unit is connected to both ends of the positioning leak detection line, and the monitoring unit is configured to collect the resistance value between the first conductive wire and the second conductive wire.

2. The tunnel water leakage monitoring device according to claim 1, characterized in that, Both the first and second conductive wires are U-shaped. The first conductive wire includes a first end and a second end, and the second conductive wire includes a third end and a fourth end. When there is a leak, the second end and the third end are in a conductive state.

3. The tunnel water leakage monitoring device according to claim 2, wherein, The monitoring unit includes a first resistance measuring circuit, the first resistance measuring circuit comprising: A constant current source circuit is connected to the first and fourth ends of the positioning leak detection line, and outputs a constant current. A voltage acquisition circuit is configured to measure a first voltage value, a second voltage value, a third voltage value, and a fourth voltage value, wherein the first voltage value is the voltage between a first terminal and a second terminal, the second voltage value is the voltage between a second terminal and a third terminal, the third voltage value is the voltage between a third terminal and a fourth terminal, and the fourth voltage value is the voltage between a first terminal and a fourth terminal.

4. The tunnel water leakage monitoring device according to claim 3, wherein, The first resistance measurement circuit further includes: A series resistor circuit consists of a first reference resistor, a resistor to be measured, and a second reference resistor connected in series in sequence. Wherein, the resistor being measured is any resistor in the first group of resistance values, and the first reference resistor and the second reference resistor are resistors with known resistance values; The voltage acquisition circuit is connected across the two ends of the resistor under test and is used to measure the voltage across the resistor under test.

5. The tunnel water leakage monitoring device according to claim 4, wherein, The first reference resistor is the resistance value of the first section of the first conductive wire, and the first section is the section from the starting point of the tunnel to the leak point. The second reference resistor is the resistance value of the second section of the second conductive wire, which is the section from the leak point to the end of the tunnel.

6. The tunnel water leak monitoring apparatus of claim 1, wherein, The monitoring unit also includes a power supply module, and the monitoring host also includes a serial communication module, an alarm module, and a processing module. The first acquisition module in the monitoring unit is electrically connected to the power supply module and the processing module. The power supply module is electrically connected to the serial communication module, the alarm module, and the processing module.

7. The tunnel water leakage monitoring device according to claim 6, wherein, The monitoring unit also includes a second resistance measurement circuit; The second resistance measurement circuit is configured to acquire a second set of resistance values; The processing module receives a first set of resistance values ​​and a second set of resistance values ​​sent by the monitoring unit, and calculates the location of the leak based on the first set of resistance values ​​and the second set of resistance values.

8. The tunnel water leakage monitoring device according to claim 7, characterized in that, The device further includes a transmission unit connected to the serial communication module, the serial communication module being configured to receive leakage location data sent by the processing module, and the transmission unit being configured to receive leakage location data sent by the serial communication module.

9. The tunnel water leakage monitoring device of claim 6, wherein, The processing module includes a processor and an analog-to-digital acquisition module. The analog-to-digital acquisition module is configured to receive a first voltage value, a second voltage value, a third voltage value, and a fourth voltage value measured by the voltage acquisition circuit, and convert them into digital signals. The processor is configured to receive the digital signal and a constant current, and to calculate a first set of resistance values ​​and a second set of resistance values.

10. The tunnel leakage monitoring device according to claim 6, characterized in that, The power supply module includes a first conversion circuit, a second conversion circuit, and a reference voltage source circuit.