Working principle of high-precision laser ranging sensor

• time：2023-09-26 16:10:37
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The high-precision laser ranging sensor is a high-precision instrument used to measure the distance from an object to the sensor. Its working principle is based on the emission and reception of laser beams. The following is the working principle of high-precision laser ranging sensor:

Laser emission: The sensor generates a laser beam through a laser (usually a laser diode). This laser beam is directed onto the target object.

Beam reflection: The laser beam irradiates the target object and is reflected back to the sensor by the surface of the target object.

Time Measurement: The sensor uses a photodetector to detect the returning laser beam and measures the time it takes for the beam to travel from emission to reflection. This is usually accomplished by recording the time difference between the emission time and reception time of the laser beam.

Distance calculation: The sensor uses the speed of light (usually the speed of light) and the time difference to calculate the distance from the target object to the sensor. The distance can be calculated according to the following formula:

Distance = (speed of light * time difference)/2

Because light needs to travel back and forth, the time difference needs to be divided by 2.

Accuracy improvement: High-precision laser ranging sensors usually use precision clocks and electronic equipment to measure time differences with microsecond or even nanosecond level accuracy. Additionally, some systems may employ multiple laser transmitters and receivers to increase measurement accuracy.

Environmental Correction: Sensors may also consider environmental factors such as temperature, atmospheric pressure, and air humidity, as these factors can affect the speed of light and thus the accuracy of distance measurements. The sensor may correct for these environmental factors to obtain more accurate distance measurements.

High-precision laser ranging sensors are usually used in applications that require extremely high distance measurement accuracy, such as surveying and mapping, geological exploration, manufacturing engineering, robot navigation, three-dimensional scanning and scientific research. The working principle and precision of these sensors make them an indispensable tool in many applications.