The S-brake camshaft includes a cam, a transmission shaft and a flange opened on the transmission shaft. An integrally manufactured mounting seat is installed on the cam, and the transmission shaft is welded and connected to the mounting seat; the end of the transmission shaft away from the cam There is a groove, and a viewpoint sensor is fixedly installed inside the groove; a threaded groove is opened on the transmission shaft around the groove, and a positioning part is installed on the transmission shaft through a threaded connection, and a threaded connection part matching the threaded groove is opened on the positioning part. There is a wireless transmitter device installed in the positioning part, and the wireless transmitter device is connected to the viewpoint sensor through an internal circuit ; There are also 2 support grooves on the transmission shaft.

The S-brake camshaft can increase the welding area between the transmission shaft and the mounting seat through the welding groove, thereby making the welding between the transmission shaft and the cam more firm; the sensor can sense the change of viewpoint when the S-brake camshaft rotates, and then pass through the connected The wireless transmission device sends the viewpoint information to the car processor, which realizes the real-time monitoring of the S-brake camshaft.