Distance sensor principle

First, the principle of distance sensor - - Introduction

The distance sensor, also called the displacement sensor, is a kind of sensor used to sense the distance between it and an object to complete a certain function. At present, to get the phase-to-wide application, let us hurry up. What is the principle of it?

Second, the principle of distance sensor

Distance sensors can be classified into optical distance sensors, infrared distance sensors, ultrasonic distance sensors, etc. according to their working principles. At present, most of the distance sensors used on mobile phones are infrared distance sensors, which have an infrared emitting tube and an infrared receiving tube. When the infrared rays emitted by the transmitting tube are received by the receiving tube, the distance is relatively close, and the screen needs to be closed to avoid misoperation. Phenomenon, when the receiving tube does not receive the infrared light emitted by the launch tube, indicating that the distance is far away, there is no need to close the screen. Other types of distance sensors work in much the same way. They also judge the distance of a substance by its emission and acceptance. The emitted substances can be ultrasonic waves, light pulses, and so on.

Third, the principle of distance sensor - - application

The most widely used application of distance sensors is mobile phones. Currently, smart phones on the market contain distance sensors. When the user connects the phone, the mobile phone is closer to the ear, which is prone to misoperation (such as when laughing) The face is easy to hang up the phone), so the distance sensor needs to monitor the distance in time, and automatically close the screen when the distance is too close to avoid the occurrence of misoperation. In addition, distance sensors can also be used for mine depth measurement, aircraft height detection, and field environment exploration. With the continuous development of technology, there are also outstanding performances in wearable devices (such as smart belts).

Distance sensor principle