Carbon brush wear on-line detection system

The invention provides a carbon brush wear on-line detection system. The carbon brush wear on-line detection system comprises a detection unit and a coil spring used for fixedly installing the detection unit. The pre-tightening force applying side of the coil spring abuts against a carbon brush, and the coil spring rotates along with movement of the carbon brush after the carbon brush is abraded. The detection unit comprises an accelerometer and a processing unit; the output end of the accelerometer is connected to the input end of the processing unit and is used for detecting the rotation amount of the coil spring when the carbon brush is abraded, and the processing unit determines the abrasion state of the carbon brush according to a detection signal output by the accelerometer; abrasion of the carbon brush can be accurately detected, monitoring data can be uploaded in time, the influence of carbon powder generated in the abrasion process of the carbon brush on detection can be effectively avoided, and ther