Urban comprehensive pipe gallery open type multi-component gas on-line monitoring early warning device

Abstract

The invention relates to an urban comprehensive pipe gallery open type multi-component gas on-line monitoring early warning device, which comprises a host machine unit, a laser emitting unit and an omni-directional reflector unit, wherein the host machine unit is used for outputting a coupled laser beam, receiving multiple paths of signals which are output by the laser emitting unit and are subjected to photovoltaic conversion, performing subsequent processing on the electric signals and finally obtaining the concentration of various kinds of target monitoring gas; the laser emitting unit receives the coupled laser beam output by the host machine unit and sends the multiple paths of electric signals subjected to photovoltaic conversion to the host machine unit; a formed collimated beam is transmitted to the omni-directional reflector unit; the reflecting light of the omni-directional reflector unit is received; the omni-directional reflector unit receives the collimated beam formed by the laser emitting unit and reflects the collimated beam. The multi-component gas on-line monitoring early warning device has the advantages that a laser absorption spectrum technology is used; the gas concentration condition on the whole route can be monitored in real time; the defects of point type monitoring are avoided; the absorption spectrum line of monitoring target gas is locked in real time; the drifting generated after long-period operation is avoided; the accuracy and the precision of gas monitoring are ensured.

Description

technical field [0001] The invention relates to the technical field of monitoring and early warning of urban underground comprehensive pipe gallery, in particular to an open multi-component gas online monitoring and early warning device of urban comprehensive pipe gallery. Background technique [0002] The urban underground comprehensive pipe gallery is an important infrastructure and "lifeline" to ensure the operation of the city. It is a municipal public facility that implements unified planning, design, construction and maintenance, and is built underground in the city for laying municipal public pipelines. Therefore, before the construction of the urban underground comprehensive pipe gallery, the workers are actually working in a closed environment or a closed space during the construction process. The occupational hazard protection of the employer in the closed space operation is particularly important. After the underground integrated pipe gallery is completed, it is...

AI Technical Summary

Problems solved by technology

[0004] At present, the gas sensors routinely used in the integrated pipe gallery include electrochemical, infrared, laser and other methods. However, the electrochemical and infrared types have disadvantages such as low monitoring accuracy, short service life, and point-based monitoring, which cannot effectively monitor the entire pipe gallery. The internal situation makes a judgment; although the laser type appeared late, its advantages such as high precision, wide response range, and large coverage are favored by users, but due to various technical reasons, it has not been actually widely used in urban comprehensive pipe corridors.

Images