Subway CO2 gas monitoring system based on double-sided metal-clad optical waveguide sensor

Abstract

The invention provides a subway CO2 gas monitoring system based on a double-sided metal-clad optical waveguide sensor. The system comprises a plurality of terminal sensor nodes comprising a CO2 sensorthat is used for CO2 content detection and includes a double-sided metal-clad optical waveguide, a photoelectric conversion module for signal input, a first microprocessor for data acquisition and preprocessing, a first wireless communication module for data communication work, and a first power supply, an aggregation node comprising a second microprocessor, a second wireless communication moduleand a second power supply and being used for collecting and summarizing data acquired by the terminal sensor nodes and transmitting the data, and a control terminal that comprises a main control module, a data storage module, a CO2 content abnormality alarm module and a power supply module and is used for receiving and comprehensively processing the data uploaded by the aggregation node and monitoring whether the CO2 content is abnormal or not in real time. According to the invention, the safe operation of the subway station can be efficiently and sensitively guaranteed, and the stability andreliability of CO2 gas monitoring are improved.

Description

technical field [0001] The invention relates to the field of gas monitoring, in particular to a subway CO based on a double-sided metal-coated optical waveguide sensor. 2 Gas monitoring system. Background technique [0002] With the rapid development of my country's urban rail transit, the subway has become a very important part of my country's public transport service system. As of 2018, a total of 5,766.6 kilometers of urban rail transit lines have been built and put into operation in 35 cities in mainland China, transporting tens of millions of passengers every day. The subway is generally deep underground, and the air exchange with the outside world can only be carried out through the entrance and exit of the station and the limited tunnel air shaft. The metabolism of people in underground stations and train carriages produces large amounts of CO 2 Gas, when its content reaches a certain threshold, will affect human health, and the natural flow and diffusion of air al...

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