What kind of encoder is used for wheel speed sensor?
For even greater signal accuracy a precision encoder can be used. The functional principles of the two encoders are similar: a multichannel magneto-resistive sensor scans a target wheel with 256 teeth, generating sine and cosine signals. Arctangent interpolation is used to generate rectangular pulses from the sine/cosine signal periods.
What do you need to know about a speed sensor?
Everything You Need to Know About the Speed Sensor The speed sensor, an essential component for the operation of several on-board systems, allows the magnetic rotation speed to be measured in order to provide a voltage corresponding to the rotation speed. It is widely used in the aeronautics, automotive and precision engineering sectors.
How does a speed sensor work with an Excitor?
Speed sensor and excitor (Fig. 11.40) The speed sensor uses the variable reluctance magnetic sensing principle, whereby a cylindrical permanent magnetic core with a coil wire wound around it, mounted on the stationary hub carrier, axle casing or back plate, produces a magnetic field (flux) which overlaps the rotating excitor ring.
How to test wheel speed sensor, the fastest method?
There is an easy and quick method to do the speed sensor test. Keeping up with the speed sensor is essential as it lets the driver know about the speed. This way, he drives in a controlled manner. In the US, you easily get penalized as the speeding tickets.
What kind of speed sensor does a car use?
The wheel speed sensor, also known as the vehicle speed sensor (VSS), is a SENSOR used to measure the steering of the car wheels. Commonly used wheel speed sensors are: magnetoelectric wheel speed sensors and Hall effect wheel speed sensors. For modern vehicles, wheel speed information is essential.
For even greater signal accuracy a precision encoder can be used. The functional principles of the two encoders are similar: a multichannel magneto-resistive sensor scans a target wheel with 256 teeth, generating sine and cosine signals. Arctangent interpolation is used to generate rectangular pulses from the sine/cosine signal periods.
How does a wheel speed sensor ( WSS ) work?
A typical inductive WSS comprises a coil winding surrounding a soft iron core connected to a permanent magnet. This sensor requires a rotating trigger wheel to induce an alternating current in the coil that is proportional to the wheel speed.
How does free play affect wheel speed sensors?
Excessive free play in wheel bearings can have dramatic effects on the operation of wheel speed sensors, since the play in the bearing can move the reluctor ring away from the sensing magnet. This is especially true in cases where the reluctor ring or magnetic encoder in located inside the bearing.