Laser spectrum cable trench gas detection system

Abstract

The invention discloses a laser spectrum cable trench gas detection system which comprises a laser emission end, a laser receiving end, a walking device and a remote monitoring terminal, wherein the walking device comprises two parallel tracks and a walking trolley; a motor can drive a track wheel so that the walking trolley walks along the track; the laser emission end and the laser receiving end are oppositely arranged on the walking trolley; the remote monitoring terminal comprises a central processing unit, a walking control unit and a display screen; the laser emission end and the laser receiving end are connected with the central processing unit through an optical cable; and the motor is connected with the walking control unit through a wire. In the invention, various harmful gases in the cable trench are detected by the laser spectrographic analysis, and the workflow of concentration detection of the harmful gases in the cable trench is simplified; and meanwhile, the concentration of the harmful gases on each key position in the cable trench can be detected anytime by using the walking trolley, and safety guarantee is provided for the cable conveying and inspection workers.

Description

technical field [0001] The invention relates to a laser spectrum cable trench gas detection system. Background technique [0002] It is used to detect the gas composition at key positions in the cable channel, and timely discover the external flammable gas and toxic gas entering the tunnel. Through gas monitoring and alarm, the location of hidden danger points and the content of gas composition can be found in time, providing technical support for timely and effective disposal. It is of great significance to improve the operating environment of cable channels and ensure the safe and stable operation of cable channels and power cable equipment. [0003] During the routine inspection of cable operation, the staff generally use two methods to detect harmful gases. The first method is: the maintenance staff carry a portable toxic and harmful gas detector before entering the tunnel. When the gas concentration is found to be abnormal, the detector An alarm will be issued to notif...

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Problems solved by technology

[0003] During the routine inspection of cable operation, the staff generally use two methods to detect harmful gases. The first method is: the maintenance staff carry a portable toxic and harmful gas detector before entering the tunnel. When the gas concentration is found to be abnormal, the detector An alarm will be issued to notify the working personnel to evacuate. The problem with this method is that there is a delay in the alarm. When the alarm is issued, the maintenance staff has already entered the cable trench. If the danger comes suddenly, the personnel may not have time to evacuate, and the safety and reliability are insufficient. The second way is: install corresponding gas sensor in channel, this method is based on the experimental analysis after wet chemical technology and suction sampling, judges the composition of test gas, there are following problems in this kind of way: 1. In this type of method, the sensor is in direct contact with the process gas. As time goes by, the sensor may degrade, especially when the cable channel contains moist pollutant gas, the degradation will be more serious. When the degradation occurs, the system response characteristics will also change. change, resulting in inaccurate detection results and a significant decrease in service life; 2. The sensor usually only corresponds to the detection of one gas. When there are many types of target gases, multiple sensors need to be installed, which is more cumbersome

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