The difference between laser displacement sensor and laser ranging sensor is as follows
1： The principle of measurement is different
1. The operation principle of laser ranging sensor: firstly, the laser pulse is emitted by the alignment policy, and then the laser is scattered in all directions after the policy reflection. Part of the reflection will come back to the sensor and then accept the image after it goes to the avalanche photodiode. Diode is a kind of optical sensor with extended function. Therefore, he can sense the weak light signal, record and process the time from the time when the light pulse is sent to the time when it is accepted. This can determine the policy distance.
2. The operation principle of laser displacement sensor: the probe sends out a laser beam and diffuse reflection occurs on the surface of the measured object. The reflected beam of light can reach the receiving device of the probe. The probe calculates the displacement by calculating the angle of the reflected laser beam. Therefore, this kind of excitation displacement sensor is also called triangular reflection sensor, and its accuracy can reach nanometer level Trigonometry is suitable for high precision and short distance measurement. In the current industrial robot applications, the triangulation method is usually used. The maximum linearity of this method can reach 1 um and the resolution can reach 0.1 um.
2： Different fields of application
1. The laser displacement sensor is mainly used to measure the displacement, flatness, thickness, vibration, distance, diameter and other geometric parameters
2. Laser ranging sensors are mainly used in: traffic flow monitoring, vehicle pedestrian illegal monitoring, UAV, unmanned carrier, automatic driving and other emerging areas of laser ranging and obstacle avoidance.
Therefore, to sum up, the application of laser ranging sensor and laser displacement sensor is different, and the occasions used are also different.