综合表决的传感器故障检测方法及其应用

A new technique of sensor fault detection by changing weighed value

针对传感器不具有等精度的特征,提出了一种改进的均值-偏差积检测法,通过加权变换的方法将不等精度的传感器,根据其精度分别赋予不同的权值,组成了综合表决系统,进行多传感器冗余系统的故障检测。本方法不受传感器等精度和故障传感器输出不能相同等假设条件的限制,既减弱了使用的假设条件,扩大了应用范围;又提高了检测的正确率,有利于提高数据融合精度和降低设备成本。

Considering that different sensor has different precision, we put forward an improved method of mean value - accumulative deviation detection. Different weights are given to different sensors according to their precision, thus a synthetic vote system is formed for fault detection of multi - sensor redundancy system. This method is not limited by whether the sensors have equal precision or whether the fault sensors have the same output, thus it is more applicable to the real system, with the features of reduced presumed conditions, improved detection ratio and extended scope of application. It is also useful for improve data fusion accuracy and decrease the equipment cost.