Laser is widely used in the field of detection, and the technology content is very rich.Laser ranging is one of the earliest USES of laser.This is because the laser has a strong direction, high brightness, monochromaticity and many other advantages.The basic principle of measuring the distance using the time of laser transmission is to determine the distance of the target through the time needed to measure the laser to and from the target.
Now, in the method of automatic detection and control, in addition to ultrasonic sensor and ordinary photoelectric sensor, a new method that can handle long distance measurement and inspection is added -- laser distance sensor at transmission time.It provides flexibility for a variety of different applications, which can include the following
(1) equipment positioning.
(2) measure the material level of the material bag.
(3) Measure the distance and height of the objects on the conveyor belt.
(4). Measure the diameter of the log.
(5). Maintain overhead cranes from collisions.
(6). Error-free inspection occasions.
The laser rangefinder generally adopts two methods to measure the distance: pulse method and phase method.The pulse range finder works like this: the laser light emitted by the laser range finder is reflected from the measured object and then absorbed by the laser range finder, which records the time of the laser back and forth.Half the speed of light times the time to go back and forth is the distance between the laser rangefinder and the measured object.The accuracy of measuring distance by pulse method is generally about +/- 1 meter.Other, this kind of rangefinder measurement blind area is generally about 15 meters.
Four points about how to use laser rangefinder