Toyota Speed Sensor

Description

What Are the Types of Speed Sensors?

Here are a few types of sensors for automotive applications:

1. Hall Effect Sensor

A Hall effect sensor is a magnetic sensor that consists of a reluctor that moves against that hall sensor to produce a magnetic field (magnetic flux) and thereby a voltage. This voltage is then transmitted to the processing units of the ABS system. The ABS control module is responsible for measuring the car’s velocity.

2. Reed Switch-Type Sensor

This is a magnetic sensor that consists of a magnet (powered by a speedometer cable) and a reed switch.

For every rotation, the magnet turns the reed switch on and off around four times. This allows the calculation of pulses per second. These pulses are then used to measure vehicle speed.

3. Active Sensor

The active sensor only works when supplied with a voltage. It then converts the voltage to a digital signal and sends it to the anti lock braking system.

An active sensor finds application in sensing wheel direction and is more efficient at a low speed.

4. Passive Sensor

A passive sensor is also known as an inductive sensor or variable-reluctance magnet sensor (VR sensor). These sensors don’t require additional voltage. Instead, it detects the wheel’s rotational motion to send a digital signal to the anti lock brake system.