Laser gas detection method with automatic linearity correction function

一种具有自动线性校正功能的激光气体检测方法

Abstract

本发明公开了一种具有自动线性校正功能的激光气体检测方法,属于工矿气体浓度测量领域;该方法包括以下步骤:产生检测光束;对检测光束分路;光束分别通过测量气室和参考气室,并进行光电转换与谐波锁相检测,并进行采集和转换之后送入核心处理器;对于经过参考气室的光束产生的信号,核心处理器将检测到的气体浓度值和激光器中心波长位置与首次标定时记录的这两个参考数据值进行比较,若不一致,则启动线性校正算法,对装置进行校正;对于经过测量气室的光束产生的信号,核心处理器根据检测到的气体浓度值进行显示和发送等;本方法在对矿井中的气体浓度进行精确测定的同时还能实现检测过程的自动校正,减少了工作人员下井维护的次数。
The invention discloses a laser gas detection method with an automatic linearity correction function, and belongs to the field of mining industry gas concentration measurement. The method comprises the following steps of: generating a detection light beam, branching the detection light beam, enabling the branched light beams to pass through a measuring air chamber and a reference air chamber, carrying out photovoltaic conversion and harmonic wave phase locking detection, then carrying out collecting and converting and finally sending the treated light beams into a core processor; for a signal generated by the light beam passing through the reference air chamber, comparing a detected gas concentration value and a central wavelength position with two reference data values recorded during calibration at the first time by the core processor, and if the values are different, starting a linearity correction algorithm, and correcting the device; and for a signal generated by the light beam through the measuring air chamber, displaying and sending by the core processor according to a detected gas concentration value. The method provided by the invention can accurately measure gas concentration in a mine and can realize the automatic correction in a detection process, thus the underground maintaining times for workers are reduced.

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