Design Of ARM-based Portable Multi-gas Detector For Coal Mine

Our country mainly uses single parameter detectors to monitor the gas environment incoal mine. Although we have developed multi-parameter gas detectors, there have someproblems, such as low stability, short maintenance period. So developing a high-performanceportable multi-parameter gas detector is particularly important. This paper proposes thedesign of ARM-based portable multi-parameter gas detector for coal mine, in view of thedevelopment of gas detector at home and abroad.This paper discusses a ARM-based multi-parameter gas detector with patrol andauxiliary functions such as temperature and humidity detect, battery detect. According to thetechnical requirement of mining equipment standards, proposes the method of non-dispersiveinfrared and electrochemistry gas detect.This paper deeply studies the detecter’s hardware and software with STM32microcontroller as the core. Hardware contains multi-signal(gas, temperature, humidity,voltage) acquisition circuit, RFID IC card read circuit, key circuit, LCD display circuit, soundand light alarm circuit, data storage, RS485communication circuit, power circuit,etc. Softcareincludes the main program, signal (gas, temperature, humidity, voltage) acquire and process,RFID contactless IC card serial number detect, sensitivity and zero point calibration of gasesand digital filter algorithm, and the simulation of median value filtering method in MATLAB.Detector is designed based on ARM platform. Using the powerful STM32F103VE as thecore processor, achieve better treatment effects. By detector testing, check the performance ofARM-based detector. The test results show that the detector in main performance such asmeasuring range, basic error, response time, alarm, etc meet the design demand in the testconditions. In conclusion, the design of gas detector solves the ever problems ofmulti-parameter gas detector such as low stability, short maintenance period, and add thefunction of electronic patrol for detector. This design provides new equipment for gasenvironment safety monitoring in coal mine.