The sensor is a sensor that uses the principle of Flying Time to detect the distance of the object.
Principle of distance sensor
The working principle of the transmission time of the transmission distance sensor is transferred when the laser sensor works.The transmission time of the transmission time must be extremely accurate to measure the transmission time, because the speed of light is too fast.If the resolution is 1mm, the electronic circuit of the transmission time ranging sensor must be able to distinguish the very short time. This is an excessive requirement for electronic technology, and the cost is too high.However, the cheap transmission time laser sensor cleverly avoids this obstacle, using a simple statistical principle, that is, the average method achieves a resolution of 1mm and can ensure the response speed.
Follow sensor repair
Normally, when the phone is called, the phone is close to the ears, the screen will turn black, leave the ears, or the other party will be on.If the sensor is too high (mentioned below), this function will fail during the daytime outdoor (sufficient light), and the screen will not light up. Click the shutdown key or home to light the screen.This is caused by the high ADC value.
What is the use of a sensor
Principles: "Flying Time Method" is currently a ranging method that is commonly used on mobile phones. It transmits a particularly short light pulse through infrared pulse sensors, and measures the time when this light pulse is transmitted from being reflected by the object. Through the measurement time intervalCalculate the distance from the object.Optical displacement sensor: The light emitted by the light source to the object, and the reflex light of the object is detected on the one -dimensional position detection element by the light lens.If the location of the object changes, the imaging position on the position detection component will be different; linear close to the sensor: we have learned the physics class, and if the coil passes through the communication, the magnetic flux phenomenon will be generated.A vortex current will be generated in the metal object to emit magnetic flux to prevent this change.The result is that the sensing of the coil has changed a certain change.By analyzing the function analysis of this change, the distance between the object object can be measured.
Start from sensor calibration
System settings -display -close -range sensor calibration and then appear (calibration prompt: Please note that there should be no obstruction within 20 cm distance of the sensor and avoid sunlight!) Then directly calibrate.
What is the distance sensor
The distance sensor is also called the displacement sensor. The distance of the sensor is generally on both sides of the phone handset or in the handset groove of the mobile phone, which facilitates its work.When the user answers or calls, the mobile phone is close to the head, and the distance between the sensor can be measured to a certain extent and notify the screen background light to go out, and light up the background light again.Save electricity.

Related tags： Machinery