Manhole cover breakage detection device and detection method thereof

Abstract

The invention discloses a manhole cover breakage detection device and a detection method thereof. According to the manhole cover breakage detection device, detection lines are arranged in a concentriccircle manner from an external connection interface to an internal part; the heads and the tails of adjacent concentric circle detection lines are connected to form cambered surfaces, the detection line at the innermost layer is bend to form an inflection point, and another external connection interface is ensured to be at the external side of a top point of an outermost layer cambered surface; acircuit is composed of a sensor, a PMOS tube, and a voltage source VCC through series connection; an external interface of the sensor is connected with the voltage source VCC, and another external interface is connected with a grid G of the PMOS tube; a source electrode S of the PMOS tube is connected with the voltage source VCC; the grid G of the PMOS tube is connected with the ground through andiode D1; the cathode of the diode D1 is arranged to be upward; one circuit of the drain electrode D of the PMOS tube is connected with the ground through a diode D2, and another circuit is connectedwith an external schmitt trigger. The manhole cover breakage detection device is capable of saving cost, and realizing real-time detection, and is accurate in detection.

Description

technical field [0001] The invention relates to the field of manhole cover damage detection, in particular to a detection device and a detection method for manhole cover damage. Background technique [0002] If the manhole cover on the ground in the city is damaged, if it cannot be replaced in time, it will leave a huge safety hazard for pedestrians and passing vehicles, and even life-threatening in severe cases. Utilizing the manhole cover damage detection device of the present invention, the manhole cover damage alarm information can be sent to the control center at the first time, and a replacement request can be made, thereby ensuring the personal and property safety of the public to the greatest extent. [0003] Existing technology can mainly be divided into two categories to the detection of manhole cover breakage. One type is to use a redesigned special inspection well cover after the manhole cover is damaged, such as: CN 105201014 A and CN 106841327 A, by presetti...

AI Technical Summary

Problems solved by technology

For the above-mentioned prior art, the disadvantages are as follows: 1. It is necessary to use a special manhole cover to replace the existing manhole cover, and the replaced manhole cover will cause waste of resources; 2. On the other hand, the re-investment of the manhole cover increases the project cost; 3. Every additional film needs to add a detection circuit, which increases the complexity of the circuit; 4. The detection circuit and the sensor film are always connected with current, which consumes the energy of the power supply, which is not conducive to improving the standby time of the battery-powered detection system; 5. For parallel Because the damage of the detection film cannot be detected well

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