Computer Science for IGCSE & O level - Hardware (Section 28 - No. 46)
In the context of a car's anti-lock braking system (ABS), a magnetic field sensor is used to:
Measure the car's speed.
Detect the rotation speed of each wheel.
Control the braking pressure.
Activate the ABS.
Forklaring
The magnetic field sensor detects the wheel's speed to determine if a wheel is locking up.