Dual-mode pressure sensing monitoring alarm device for sensing water seepage of tunnel

Abstract

The invention discloses a dual-mode pressure sensing monitoring alarm device for sensing water seepage of a tunnel. The dual-mode pressure sensing monitoring alarm device comprises a moisture sensing sensor, a signal processing device and a wireless signal transmitting device, the moisture sensing sensor comprises a water seepage membrane cloth layer, a water absorption material layer and a pressure sensing layer which are arranged in sequence; the pressure sensing layer comprises a piezoresistive sensing layer arranged above the water absorbing material layer and a piezoelectric sensing layer arranged on the piezoresistive sensing layer; the water absorption material layer absorbs water of the water seepage membrane cloth layer to expand and transmits a signal to the piezoresistive sensing layer and the piezoelectric sensing layer; the piezoelectric sensing layer and the piezoresistive sensing layer are respectively connected with a signal processing device, and the signal processing device is connected with a wireless signal transmitting device. According to the invention, a unique PDMS packaging mode is adopted to limit expansion deformation generated after the water absorption material layer absorbs water in a certain area, so that signals of water leakage are amplified, and the problem of water seepage is analyzed and judged through two different transmitted electric signals, so that water seepage is quickly responded to give an alarm.

Description

Technical field [0001] The present invention relates to a water infiltration monitoring alarm device, specifically to a dual-mode pressure sensing monitoring alarm device for sensing tunnel water seepage. Background [0002] The submarine tunnel is an important part of the transportation project, but the construction process of the submarine tunnel will face many problems due to the complex seabed geological structure and the harsh marine environment, such as high-intensity seismic areas through dense fault fracture zones, high water pressure in the sea, marine environmental erosion, etc., which will bring many negative effects on the durability of the submarine tunnel, and the water leakage problem is one of them. In addition, underground tunnels, pipeline engineering, underground heat exchange stations and other infrastructure may also have water leakage loopholes in the process, or deformation and cracks in building materials in the process of long-term use, making water leaka...

AI Technical Summary

Problems solved by technology

In addition, infrastructure such as underground tunnels, pipeline engineering, and underground heat exchange stations may also have water seepage loopholes in the process, or deformation and cracks in building materials during long-term use, making water seepage problems unavoidable

If the occurrence of water seepage damage cannot be detected in time, not only will the deterioration of the facilities be accelerated, the service life will be shortened, and in severe cases, it will cause extremely harmful disasters

[0003] At present, in the field of water leakage monitoring and alarming, most of the pipeline network leak detection systems monitor the water supply pipeline network through the vibration or sound signal of sensor sensing leakage. For example, a wireless monitoring device and method for water supply pipeline leakage disclosed in patent CN 113432805 The electric acceleration sensor is fixed on the outer wall of the monitored water supply pipeline to obtain electrical signals, but because the vibration signal is weak and the external interference is large, the cost of precision instruments for this type of leak detection system is relatively expensive; patent CN 215361766 U discloses an unmanned ship for water leakage detection The device uses the floating ball to push the contact piece to join the circuit to alarm, but due to structural limitations, the actual application effect needs to be studied; the patent CN 210666045 U discloses a water immersion sensor with the function of detecting and alarming, using the conductivity of water, when the water When the immersion sensor probe is immersed in water, the detection circuit forms a path or a current change occurs, and an alarm is issued, but a certain immersion height is required, so it is more suitable for water accumulation alarm

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