Passive cooperative target laser ranging and positioning system and method
By controlling the laser rangefinder with a brushless motor and utilizing the pseudo-random sequence numbering of passive cooperative targets, the problems of high optical power requirements and increased costs in traditional laser ranging and positioning are solved, and high-sensitivity absolute position positioning with a single laser rangefinder is achieved.
CN115840209BActive Publication Date: 2026-07-21CHANGCHUN UNIV OF SCI & TECH
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHANGCHUN UNIV OF SCI & TECH
- Filing Date
- 2022-10-26
- Publication Date
- 2026-07-21
AI Technical Summary
Technical Problem
Traditional laser ranging and positioning technology requires multiple rangefinders for measurement, resulting in high optical power requirements, reduced detection sensitivity, and increased costs, making it difficult to achieve absolute position positioning.
Method used
A brushless motor is used to control the laser rangefinder to emit a beam for mechanical scanning, and a passive cooperative target is used to number and identify the target through a pseudo-random sequence, thereby achieving absolute positioning of a single laser rangefinder.
Benefits of technology
It improves detection sensitivity, reduces optical power requirements, lowers costs, and enables absolute positioning with a single laser rangefinder.
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Smart Images
Figure CN115840209B_ABST
Abstract
The application provides a passive cooperative target type laser ranging positioning system, which comprises a laser ranging machine, a brushless motor and a passive cooperative target; the laser ranging machine is arranged in a target to be measured and is used for emitting a laser beam; the brushless motor is arranged in the laser ranging machine and is used for controlling the laser beam emitted by the laser ranging machine to mechanically scan the surrounding environment; and the passive cooperative target is arranged at a fixed position and is used for interacting with the laser ranging machine so as to obtain the absolute position of the target to be measured. The passive cooperative target is identified by using a pseudo-random code, and a local correlation is performed on the code received by a detector, so that the identification of the passive cooperative target is realized, the laser ranging link has a spread spectrum gain, and the detection sensitivity is improved. These typical advantages are the most important features for realizing the beam link in the laser ranging positioning.
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