First, the measurement principle is different.
The operating principle of the laser rangefinder: First, a laser pulse is fired at the policy, and then the laser is scattered in all directions after being reflected by the policy. Part of the reflection goes back to the sensor, where it is imaged, and then reaches the avalanche photodiode. A diode is an optical sensor with extended functionality. Thus, he can sense weak light signals, record and process the time elapsed from the time the light pulse is received, the policy distance.
The operating principle of the laser displacement sensor: the probe emits a beam of laser light, which is diffusely reflected on the surface of the object to be measured, and 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 laser displacement sensor is also called a triangular reflection sensor, and its precision can reach nanometer level. Laser triangulation is suitable for high-accuracy, short-range measurements. In current industrial robotics applications, triangulation methods are usually employed.
Second, different application areas.
Laser rangefinders are mainly used for laser ranging and obstacle avoidance in emerging fields such as vehicle flow monitoring, illegal monitoring of vehicles and pedestrians, drones, driverless cars, and autonomous driving.
Laser displacement sensors are mainly used to measure geometric quantities such as displacement, flatness, thickness, vibration, distance, and diameter of the detection object.
