Research of automatic calibration system for mine -used gas sensors
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摘要: 传统的矿用气体传感器人工标校方式易对人体造成伤害、劳动强度大、工作效率低、标校精度受人为因素影响大,而现有基于单片机等技术的自动标校仪器在同一时间只能进行单台传感器标校,只适合同类型传感器小批量标校。针对上述问题,设计了一种矿用气体传感器自动标校系统。该系统主要由服务器、上位机、智能标校柜、供排气控制箱及供排气管道等组成,实现了按预设条件同时对不同类型的矿用气体传感器进行批量自动标校验证、安全排放标校尾气、自动采集并保存标校过程数据。测试结果表明:经该系统标校后的矿用低浓度CH4传感器对0,0.5%,1.5%,3.5%CH4的测量误差均在允许范围内;系统内每台智能标校柜可同步标校10台同类型的矿用气体传感器,最多可挂接60台传感器,且标校过程无人值守,实现了矿用气体传感器安全、高效、快速的出厂标校验证。Abstract: Traditional manual calibration mode for mine -used gas sensors is easy to harm persons and has high labor intensity and low operation efficiency, whose calibration precision is greatly influenced by human factors. While existing automatic calibrators based on single chip microcomputer can only calibrate one sensor at the same time, which is applicable for calibrating the same type of sensors in small numbers. For the above problems, an automatic calibration system for mine -used gas sensors is designed. The system is mainly composed of server, upper computer, intelligent calibration cabinet, exhaust control box and exhaust pipe, which realizes automatic batch calibration of mine -used gas sensors with different types at the same time according to presupposed conditions, safe emissions of tail gas and automatic collection and storage of process data. The test results show that: For 0,0.5%,1.5%,3.5%CH4, measurement errors of mine -used low concentration CH4 sensors calibrated by the system are within permissible error range; One intelligent calibration cabinet in the system can synchronously calibrate ten mine -used gas sensors with the same type and links sixty sensors at most. The system realizes unattended calibration process and safe, efficient and fast calibration of mine -used gas sensors.
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