Novel laser radar

Abstract

A novel laser radar disclosed by the present invention comprises a laser transmitter, a laser receiver, an annular liquid crystal array, and a CPU, a memory RAM and a memory card built in the radar, a conical total reflection prism is arranged below the laser transmitter, and the conical total reflection prism is located at the center of the annular liquid crystal array; and arc-shaped liquid crystal array units are arranged between the annular liquid crystal arrays. According to the novel laser radar, a common mechanical motor laser radar measurement system is improved, the electro-optical effect of liquid crystal molecules is used as a high-speed switch to control the direction of laser instead of a mechanical motor of the common laser radar, the data acquisition and measurement precision and speed can be improved, and the novel laser radar is suitable for large-scale three-dimensional topographic survey. The novel laser radar is also suitable for three-dimensional measurement of strip-shaped terrains in road engineering and data acquisition of modeling, and can also be used for pilotless automobiles.

Description

technical field [0001] The invention relates to the technical field of road terrain measurement, in particular to a novel laser radar. Background technique [0002] Tilt photogrammetry is developed from aerial photogrammetry. Compared with manned aircraft, UAVs have the advantages of small size, light weight, and easy portability. At the same time, drones can fly at low altitude and do not need to apply for airspace, so the cost of use is low. It can carry out data collection for 1:500, 1:1000, 1:2000 and other large-scale three-dimensional topographic measurement modeling. [0003] With the development of digital cameras and digital mapping technology, oblique photogrammetry is produced. In oblique photogrammetry, multiple cameras are installed on the aircraft at the same time to take pictures of the ground at the same time, which greatly increases the number of photos and the overlap of photos, and improves work efficiency. [0004] In road engineering, subgrade cross-s...

AI Technical Summary

Problems solved by technology

Ordinary laser radar uses laser pulse to measure the time difference multiplied by the speed of light to measure the distance, or uses continuous sine waves to measure the phase difference to calculate the distance, and uses the mechanical rotation of the laser transmitter for scanning measurement, which means that the motor needs to rotate internally, but the vibration of the motor has an impact on the distance measurement.

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