What are the principles often used by laser range sensors?

Laser range sensors, also known as industrial laser distance modules, can be re-developed. Laser range sensors can be used in engineering measurement, distance measurement, industrial automation and other fields. Due to the characteristics of non-contact measurement, high-precision measurement and fast measurement, the laser distance sensor is an ideal choice for your ranging.

1. The principle of the pulsed laser ranging sensor is: a pulsed laser with a very short duration is emitted by the pulsed laser. After the distance to be measured, it is shot to the target. A part of the energy will be reflected back. Echo. The echo returns to the rangefinder and is received by the photodetector. According to the interval between the main wave signal and the echo signal, that is, when the laser pulse travels from the laser to the measured target, the distance of the target to be measured can be calculated.

2. The principle of the phase laser ranging sensor is: light-emphasis of the emitted laser light, and the phase change of the modulation signal is used when the laser space propagates. Based on the wavelength of the modulated wave, the distance represented by the phase delay is calculated. That is, the indirect method of phase delay measurement is used instead of directly measuring the time required for the laser to go back and forth to achieve distance measurement. This method can reach millimeter accuracy.

3. Triangular laser ranging sensor is the light emitted by the laser, which is focused by the condensing lens and then incident on the surface of the measured object. The receiving lens receives the scattered light from the incident light spot and images it on the photoelectric detector Surface. When the object moves, the relative distance of the object's movement is calculated by the displacement of the light spot on the imaging surface. Triangular laser ranging has a high resolution and can reach the order of microns.

The laser distance module of Chengdu JRT Technology Co., Ltd. uses the phase principle and has millimeter-level accuracy and a wide measurement range (10m, 20m, 40m, 60m, 100m, 150m). Welcome to consult.