Differences Between Laser Rangefinders and Laser Displacement Sensors
Laser rangefinder is an instrument that uses laser to accurately measure the distance of a target. Laser displacement sensors can accurately measure the position and displacement of the object being measured, mainly used to measure the displacement, thickness, vibration, distance, and diameter of the object. Although both instruments have lasers, they are completely different measuring instruments, and the difference between the two instruments is not insignificant in terms of principle or application.
1, The measurement principles are different.
The operating principle of laser rangefinder: Firstly, the laser pulse is emitted in response to the policy, and then the laser scatters in all directions after being reflected by the policy. Partial reflection will return to the sensor, then receive imaging, and finally reach the avalanche photodiode. A diode is an optical sensor with extended functionality. Therefore, he can sense weak light signals, record and process the time and policy distance experienced from the light pulse to being received.
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2. Operating principle of laser displacement sensor: The probe emits a beam of laser, which undergoes diffuse reflection on the surface of the object being measured. The reflected beam of light can reach the receiving device of the probe. The probe calculates displacement by calculating the angle of the reflected laser beam. Therefore, this laser displacement sensor, also known as a triangular reflection sensor, can achieve nanometer level accuracy. Laser triangulation is suitable for high-precision and short-range measurements. In current industrial robot applications, triangulation methods are commonly used.
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2, 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, unmanned aerial vehicles, autonomous driving, etc.
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2. Laser displacement sensors are mainly used to measure geometric quantities such as displacement, flatness, thickness, vibration, distance, diameter, etc. of the detected object.
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Therefore, in summary, the application and usage scenarios of laser rangefinders and laser displacement sensors are different.
