Proximity Sensor working principle

Question

Accepted Answer

A proximity sensor detects the presence or absence of an object within a certain range.

Proximity sensors use various technologies such as infrared, capacitive, or inductive to detect objects.
They emit a signal and measure the reflection or change in the signal to determine proximity.
For example, an infrared proximity sensor emits infrared light and measures the reflection to detect objects.
Proximity sensors are commonly used in smartphones to detect when the device is held close to the ear during a call.
They are also used in automatic doors, robotics, and industrial applications.

Accepted Answer

proximity sensors operate under the electrical principle of magnetism when a fluctuating current induces the voltage in a target object. The proximity sensor contains a certain type of solid-state control system. It contains an oscillator circuit that generates a high-frequency magnetic field.And there are type proximity sensor

1 inductive proximity sensor

2 optical proximity sensor

3 capacitive proximity sensor

4 magnetic proximity sensor

5 Ultrasonic proximity sensor

Proximity Sensor working principle

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