Steering wheel angle sensor operating principle
In addition, through the photoelectric encoder to collect corners, but in automotive applications, due to the reliability of photoelectric sensors and other issues, the use of less products, not much described here.
The steering wheel sensor usually uses three mechanical structures to measure the angle and the number of turns. The large gear rotates along with the steering tube column, and the teeth of the two pinions differ by 1, and are fixed in the body with the sensor casing, and do not rotate with the steering wheel. The two small gears are respectively collected with the rotation angle of the steering wheel, and because of the difference of one tooth, the number of different turns will be different from the specific angle, and the absolute rotation angle of the steering wheel can be obtained by calculation.
The steering wheel angle sensor, SAS, steering, wheel, sensor, serves as an integral part of the vehicle ESP/ESC (vehicle stability control system), which is installed in the steering column below the steering wheel. It is generally connected to the PCM via the CAN bus. Generally can be divided into analog steering wheel angle sensor and digital steering wheel angle sensor.
