How Does a Vehicle Speed Sensor Work?

[Julianna]

Vehicle speed sensor operates by emitting pulse signals that are shaped, measured and stored by a counting tube into a memory circuit, then processed through a timing circuit to determine the counting tube's measurement time and the memory circuit's storage time before output. Below is an introduction to the usage and classification of vehicle speed sensors: Usage of Vehicle Speed Sensor: The vehicle speed sensor is used to detect the speed of electronically controlled vehicles. The control computer uses this input signal to manage engine idle speed, torque converter lock-up in automatic transmissions, gear shifting in automatic transmissions, as well as the operation of engine cooling fans and cruise control among other functions. Classification of Vehicle Speed Sensors: They are categorized into photoelectric type, Hall effect type, and magnetoelectric type. The photoelectric vehicle speed sensor is a solid-state optoelectronic semiconductor sensor. The Hall effect sensor is a solid-state sensor. The magnetoelectric vehicle speed sensor is an analog AC signal generator.