High-speed laser distance measuring device

Abstract

The invention provides a high-speed laser distance measuring device which comprises a transmitting part and a receiving part. The transmitting part further comprises a polaroid which is arranged between a light transmitting tube and a reflector. The receiving part further comprises a polarization spectroscope which is arranged between an optical filter and a receiving tube. The light transmitting tube transmits an emitting light beam to the polaroid, thereby forming an emitting polarized light beam which is incident to the reflector. The emitting polarized light beam is reflected by the reflector and is transmitted to an object through a transmitting object lens. A reflected polarized light beam is formed through reflection. The reflected polarized light beam is emitted to the optical filter through a receiving object lens. After filtering, the filtered light beam is emitted to the polarization spectroscope. Through beam splitting, the light beam is split to a first reflected polarized light beam and a second reflected polarized light beam, wherein the first reflected polarized light beam and the second reflected polarized light beam are respectively emitted to a first receiving tube and a second receiving tube. After the structure is utilized, the high-speed laser ranging device can identify the light which is formed from a reflecting object and the object, and furthermore the light is received by different receiving devices. Furthermore an interference which is caused by particle objects in a testing environment to testing can be effectively prevented.

Description

technical field [0001] The invention relates to the field of ranging, in particular to a high-speed laser ranging device. Background technique [0002] At present, in the use of lidar, it is common to place a directional reflective target (reflective prism) on the target object to be measured so that the lidar can be easily identified and positioned. However, the intensity of the light reflected by the reflective target (reflective prism) is too high, and using the same photoelectric device to receive the light reflected by the reflective target (reflective prism) and the light reflected by the measured target object will cause damage to the lidar receiver. Irreversible damage will lead to a decrease in measurement accuracy in the long run. [0003] On the other hand, based on the existing lidar test technology, it is impossible to accurately identify the fine dust, water mist and other particulate objects in the measurement environment, and the existence of fine dust, wate...

AI Technical Summary

Problems solved by technology

However, the intensity of the light reflected by the reflective target (reflective prism) is too high, and using the same photoelectric device to receive the light reflected by the reflective target (reflective prism) and the light reflected by the measured target object will cause damage to the lidar receiver. Irreversible damage, which will lead to a decrease in measurement accuracy in the long run

[0003] On the other hand, based on the existing lidar test technology, it is impossible to accurately identify the fine dust, water mist and other particulate objects in the measurement environment, and the existence of fine dust, water mist and other particulate objects in the measurement environment will affect the test results. cause some disturbance

For example, in the experiment, water mist was sprayed around the lidar, and the image obtained after scanning became the shape of the surrounding water mist, which made the lidar unable to accurately measure the indoor contour

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