A detection device and detection method for the damage of manhole cover

Abstract

The invention discloses a detection device and a detection method for inspection shaft cover damage. The detection device is characterized in that the detection lines are arranged in concentric circles. The concentric circles start from an external port and spiral inward. The ends of similar concentric circles are connected by detection lines to form an arc, and the innermost detection line is folded into an inflection point. Ensure that another external port is outside the vertex of the outermost arc; the circuit consists of a sensor, a PMOS tube and a voltage source V CC connected in series, one external port of the sensor is connected to the voltage source V CC The other external port is connected to the gate G of the PMOS transistor, and the source S of the PMOS transistor is connected to the voltage source V CC connected, the gate G of the PMOS transistor passes through the diode D 1 ground, the diode D 1 The cathode of the PMOS transistor is upward, and the drain D of the PMOS transistor passes through the diode D 2 Ground, and the other way is connected to the Schmitt trigger ST. The detection device saves cost, has accurate detection, and can provide detection in real time.

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 manhole cover after the manhole cover is damaged, such as: CN 105201014 A and CN 106841327 A, by presett...

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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