在回转机械振动状态监测中通常采用二个互成９０°的测振传感器监测某一测点的振动状态，考虑到传感器布置上的这种双余度特点，运用信息论数学方法，得出了两传感器在融合过程中的冗余和互补特性；在充分利用二传感器冗余信息的基础上，提出了一种基于冗余率运算的传感器故障检测方法，试验结果良好 In vibration state monitoring of rotating machinery, two vibration measuring sensors are usually used to monitor the vibration state of a measuring point. Taking into account the double redundancy characteristics of the sensor arrangement, an information theory mathematical method is used to obtain two Sensor redundancy and complementary features in the fusion process; based on the full use of the redundant information of the two sensors, a fault detection method based on the redundancy rate operation is proposed, the test results are good