The survey feedback laser ranging sensor can use either the pulse ranging method or the phase ranging method, both of which have their own advantages. However, most of the laser ranging sensor applications give priority to the pulse ranging method, but the light pulse at this time needs to meet the corresponding conditions before it can be executed. Now, what requirements should the light pulse used for the laser ranging sensor meet? Briefly explain:

What are the requirements for light pulses used in laser ranging sensors?

1. The light pulse must have sufficient intensity

The pulse laser ranging of the laser ranging sensor refers to transmitting an optical pulse to the measured target, and then the receiving system receives the optical pulse reflected by the target, thereby calculating the distance of the target by measuring the round-trip time of the optical pulse. However, if the measurement distance is long, the light pulse emitted by the laser must have sufficient intensity, so as not to be insufficient to support the reflection back and forth.

2. The directionality and monochromaticity of the light pulse are better

The light pulse used for the laser ranging sensor should also meet the requirements of good directionality and monochromaticity of the light pulse. Because the accuracy of the range measurement is closely related to the directionality and monochromaticity of the light pulse, if the directionality and monochromaticity of the light pulse are poor, it is not conducive to quickly capture the information of the object to be measured, and it will also greatly affect the accuracy to be measured. the level of.

3. The width of the light pulse should be narrow

According to the analysis of many experts, the width of the light pulse will also greatly affect the measurement accuracy of the laser ranging sensor. Because its measurement is mainly counted by clock pulses, if the width of the optical pulse is wider, the measurement accuracy will also increase; on the contrary, if the width of the optical pulse is narrower, the clock pulse will also be affected accordingly.

The laser ranging sensor has a reliable distance measurement function and is not afraid of the influence of wind, rain and other harsh environments. However, if you want to accurately grasp the range of the laser ranging sensor, the optical pulse used by the laser ranging sensor needs to meet other requirements such as good directionality and monochromaticity and narrow width of the optical pulse in addition to meeting the requirements of intensity.