1. Phase laser ranging
The amplitude of the laser beam is modulated with the frequency of the radio band, and the phase delay produced by the round trip of the modulated light is measured, and then the distance represented by the phase delay is converted according to the wavelength of the modulated light. That is, the time required for the light to travel back and forth through the survey line is measured by an indirect method.
2. Pulsed laser ranging
This method uses the characteristics of very short duration of laser pulse, relatively concentrated energy in time, and large instantaneous power to measure distance.
3. Triangulation laser ranging
The measurement method of the laser displacement sensor is called the laser triangulation method. The accuracy of the laser rangefinder is certain, and the same rangefinder has the same accuracy for measuring 10 meters and 100 meters. The measurement accuracy of the laser three-reflection method is related to the range, and the larger the range, the lower the accuracy.
4. Laser wave method
The laser displacement sensor uses the principle of echo analysis to measure the distance and can achieve a certain degree of accuracy. The laser displacement sensor transmits 10,000 pulses per second through the laser transmitter to the detection object and returns to the receiver. The processor calculates that the laser pulse encounters the detection object. And return the time required by the receiver to calculate the distance value, the output value is the average output of the measurement results in the morning.
