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Small low-altitude light area array laser radar measuring system

A measurement system, laser radar technology, applied in the direction of radio wave measurement system, measurement device, electromagnetic wave re-radiation, etc., to achieve the effect of reducing volume, size and weight, and improving use efficiency

Active Publication Date: 2013-11-27
GUILIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0007] The purpose of the present invention is to provide a low-altitude light and small area array laser radar measurement system in order to solve the problems existing in the existing laser radar measurement system proposed above

Method used

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  • Small low-altitude light area array laser radar measuring system
  • Small low-altitude light area array laser radar measuring system

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Embodiment

[0034] like figure 1 As shown in the working schematic diagram, the laser radar measurement system of this embodiment is carried on a 200m low-altitude small UAV for three-dimensional data acquisition. A single laser pulse can detect a target area of ​​5m×5m, and the distance error of the generated three-dimensional image is less than 0.12m, pixel pitch is 0.625m.

[0035] like figure 2 As shown, the low-altitude light and small area array lidar measurement system includes position and attitude measurement subsystem 1, main control subsystem 2 and area array lidar ranging subsystem 3.

[0036] The position and attitude measurement subsystem 1 is composed of a GPS receiver 101 and an attitude measurement module 102 .

[0037] The main control subsystem 2 is composed of a microcontroller 201 , a timer 202 and a memory 203 .

[0038] The area array lidar ranging subsystem 3 consists of a pulsed laser emitting module 301, a collimating lens 302, a beam splitter 303, a total re...

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Abstract

The invention discloses a small low-altitude light area array laser radar measuring system. The master control sub-system of the measuring system triggers a pulse laser emitting module to emit lasers, the lasers are collimated and generate two paths of laser signals through a beam splitting sheet, one path is used for determining the time of emitting the lasers and generating timing starting signals, the other path irradiates an object through beam expansion, echo signals are received by an APD array detection module and generate N2 paths of stopping pulses, and a multi-channel high-precision time interval measuring module is combined with starting signals to measure the round-trip flight time difference of N2 paths of lasers of a rectangular detection area. The location attitude measuring sub-system, the master control sub-system and the area array laser radar distance-measuring sub-system of the measuring system are integrated, original three-dimensional information can be obtained in real time, and assembling and verification are eliminated. The laser radar measuring system does not need scanning, three-dimensional imaging can be achieved through a single pulse, the imaging speed is high, measuring precision and working efficiency are high, the size is small, the weight is small, and the small low-altitude light area array laser radar measuring system is suitable for being carried small low-altitude light remote sensing platforms.

Description

technical field [0001] The invention relates to laser radar technology in the field of active optical aerial remote sensing payloads, in particular to an area array laser radar measurement system suitable for carrying on a low-altitude light and small remote sensing platform. Background technique [0002] Lidar measurement is an active optical remote sensing technology that has rapidly developed into a hot spot. It provides an important means for obtaining three-dimensional space data, and is suitable for target detection, earth observation, three-dimensional modeling of urban buildings, and traffic lines, power lines, Survey and planning of oil and gas pipelines, etc. The laser radar measurement system includes a laser ranging unit, a position and attitude measurement unit and a main control unit. It uses the distance information measured by the laser ranging unit, and then combines the position and attitude information obtained by the position and attitude measurement uni...

Claims

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Application Information

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IPC IPC(8): G01S17/89
Inventor 周国清周祥农学勤杨小平张飙杨春桃马建军
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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