Tunnel fire early warning sensor and pavement layout system based on smart materials

Abstract

The invention discloses a tunnel fire early warning sensor based on smart materials and a road surface layout system of the tunnel fire early warning sensor. The tunnel fire early warning sensor comprises a sensor element which is made of the smart materials and can induct temperature changes, two electrodes are arranged in the sensor element, the built-in electrodes need to be externally connected with outer lines for measurement, terminals of the built-in electrodes are coated with protective layers, and a packaging layer is arranged on the surface of the sensor element. The element made of the smart materials has good temperature sensitivity, can induct the abnormal temperature changes of the outside and convert the temperature changes into electric signals, and is a core component of the sensor, and the tunnel fire early warning sensor can be suitable for tunnel fire early warning, and is high in reliability.

Description

technical field [0001] The invention relates to the field of fire protection, in particular to a tunnel fire early warning sensor based on agile materials and a pavement layout system thereof. Background technique [0002] Most of the tunnels are buried in the stratum, and the underground space is used. Once there is a fire disaster, it is difficult to escape. If it is not found in time, it is difficult to carry out rescue work in time. Due to the seriousness of tunnel fire consequences, an efficient tunnel fire early warning system is of great significance for timely detection of fire disasters and protection of people's lives and property safety. The problem of tunnel fire detection has become one of the primary issues in the field of tunnel safety. At present, the detection of tunnel fire mainly includes thermal alloy wire type, optical fiber type and dual-wavelength flame detector type. The sensors used mainly include flame sensors, temperature sensors, smoke sensors, e...

AI Technical Summary

Problems solved by technology

[0004] However, the time from fire to eruption in tunnels is often short, which requires a faster response speed for fire detection and alarm systems based on distributed optical fiber temperature sensing devices, and distributed optical fibers are usually arranged on the tunnel vault location, the distance between the tunnel section and the fire occurrence point on the road surface is often the largest, so the response time will often be extended; in addition, when the longitudinal wind speed in the tunnel is relatively high (for example, when the fan is turned on), according to It is difficult to identify the abnormal temperature field in a short period of time and trigger an alarm with the usual absolute temperature, absolute temperature rise, and temperature rise gradient equal discriminant indicators

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