In view of the fact that there are many gases in the traditional electric power foundation pits and it is difficult to be distinguished,and the problem that workers in the foundation pits are more likely to be poisoned,a multi-gas detection system is designed.The system adopts the method of photoacoustic spectrum detection,sound and light alarm circuit and buzzer alarm circuit,which can realize the detection of toxic gas in the foundation pits.The system can be divided into power supply module and processor,digital-to-analog conversion module,and gas sensor module in terms of hardware structure.Through the coop-eration of these three modules,it can realize the identification of various gases in the foundation pit.The experimental results show that the designed system has smaller detection error and higher measurement accuracy.
关键词
电力基坑/气体浓度检测/光声光谱/数模转换
Key words
power foundation pit/gas concentration detection/photoacoustic spectrum/digital-to-analog conversion
维普
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