Automatic Detection System and Intelligent Security Control Technology for Toxic Gases in Underground Operations

Deep foundation pit operation is a fundamental and important process. Due to the complex and variable geological structure of the operation site, the large amount of work, many dangerous factors and it is difficult to observe and identify, it is easy to cause safety accidents during construction. Toxic gas monitoring is essential in deep foundation pit operations. The article relies on the equipment integrated gas sensor to closely monitor the air quality status. When the sensor detects that the air quality exceeds the threshold, the on-site sound and light alarm is activated in time, and the alarm message, WeChat, and real-time voice call are pushed to the mobile phone to realize multi-dimensional real-time notification of toxic gases. Based on the theory of absorption spectroscopy, this article proposes an experimental system for tenable laser diode absorption spectroscopy for gas detection. According to the requirements of tuned diode laser absorption spectroscopy for semiconductor lasers, a laser light source is selected and its tuning performance is tested. The laser control is explained. Selection and performance analysis of unit, long optical path gas cell, photoelectric receiver. The results show that the hardware platform can quickly complete the detection of toxic gases, the shortest time can reach 0.6s, and the effect is relatively ideal.