多电位阶跃法区分电化学传感器不同气体信号的原理和方法

Distinguishing of different gas signals from electrochemical gas sensor by multi-voltage-steps technique-the principle and method

该文报道的是一种传感器信号的识别技术。利用多电位阶跃法对电化学传感器检测不同气体得到的信号进行区分。在一个电化学传感器上周期性地施加多个电位阶跃,并同步地采集每个电位下相应的电流信号。对采集的数据按一定的程序进行运算处理后可得到一个气体信号的识别值,将该值与已储存的不同气体信号的识别值进行比较,就可判断被测气体是什么。该技术与传统模式识别技术的差别是用一个传感器取代了前者所需要的传感器阵列。

A kind of signal distinguishing technique is reported in this paper. Multi-voltage-step method is used in this technique for distinguishing of different gas signals from electrochemical gas sensor. In the technique, several (two or more) voltage steps are exerted on an electro-chemical gas sensor and the current data which come from the sensor corresponding to each voltage steps are collected synchronistically. The collected data are dealt with a program to get a recognition value which is compared with the preliminarily stored recognition values of different gases so that the gases being detected by electrochemical gas sensor can be recognized. The difference between this technique and traditional pattern recognition technique is that only one sensor is needed in the former but an array of sensors are needed in the latter.