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Performance comparison between laser ranging sensor principle and ultrasonic ranging sensor

2019-08-22

The laser range finder has a long measuring distance, high precision and low interference, which can be used for precise positioning. The laser range finder/ranging sensor is a sensor that uses a laser to accurately measure the distance of a target. The laser range finder emits a very fine laser beam to the target during operation. The photoelectric component receives the laser beam reflected by the target, and the timer measures the time from the transmission to the reception of the laser beam to calculate the distance from the observer to the target. The laser range finder is currently the most widely used range finder sensor. The laser range finder/ranging sensor can be classified into a handheld laser range finder/ranging sensor and a telescope laser range finder/ranging sensor.


Ultrasonic ranging sensors are also often used to detect objects that are far apart, and because they are not optical devices, they are not affected by color changes. However, the ultrasonic sensor measures the distance based on the speed of sound, so there are some inherent disadvantages that cannot be used in the following cases.
1 When the target to be tested is not perpendicular to the transducer of the sensor. Because the target of ultrasonic testing must be within an angle of no more than 10° from the vertical azimuth of the sensor.
2 Where the beam diameter is small. Because the general ultrasonic beam is 0.76 cm in diameter when it is 2 m away from the sensor.
3 Where the visible spot is required for position calibration.
4 windy occasions.
5 vacuum occasions.
6 Where the temperature gradient is large. Because this situation will cause a change in the speed of sound.
7 need to respond quickly.
The Laser Ranging Sensor can solve the above detection in all occasions.

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