Laser radar system and method used in wide-temperature environment
A laser radar and optical system technology, applied in radio wave measurement system, using re-radiation, electromagnetic wave re-radiation and other directions, can solve the problems affecting ranging accuracy, target distance drift, etc., and achieve the effect of improving measurement accuracy
Pending Publication Date: 2021-01-29
NANJING INST OF TECH
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[0030] The present invention will be described in further detail below in conjunction with specific examples. The following examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention.
[0031] The present invention mainly aims at the drift phenomenon caused by laser radar in target distance measurement in wide temperature environment, and provides a laser radar system and method used in wide temperature environment based on double detector detection.
[0032] like figure 1 As shown, a lidar system used in a wide temperature environment, including:
[0033] a laser transmitter assembly for generating a pulsed laser beam;
[0034] The beam splitter is placed behind the laser emitter assembly and placed at a certain angle relative to the center of the emitted laser beam. In this embodiment, it is placed at an angle of 45°; it is used to divide the emitted laser beam into two paths, one of which is directly transmi...
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The invention relates to a laser radar system and method used in a wide-temperature environment. The laser radar system comprises a laser emitter assembly for generating pulse laser beams; a spectroscope which is used for splitting the emitted laser beam into two paths, one path is directly transmitted to the first laser receiver assembly, and the other path is transmitted to a space to be detected; a first laser receiver assembly which is used for receiving one path of laser beam passing through the spectroscope and converting the laser beam into a voltage pulse signal; a second laser receiver assembly which is used for receiving the laser echo reflected by the target and converting the laser echo into a voltage pulse signal; and a signal processor which is connected with the laser emitter assembly, the first laser receiver assembly and the second laser receiver assembly and is used for generating a laser emission driving signal. According to the invention, a laser emission beam is divided into two paths by the spectroscope, one path is used as a measurement starting moment, and the other path is used as a target detection ending moment, thereby realizing target distance measurement without temperature change, and improving the measurement accuracy of the laser radar.
Description
technical field [0001] The invention relates to the technical field of laser radar, in particular to a laser radar system and method used in a wide temperature environment. Background technique [0002] The laser radar system uses laser orientation and ranging, and identifies targets through information such as position, speed, and surface emission characteristics. The laser radar system inherits technologies such as laser emission, scanning, receiving, and signal processing, and has high measurement resolution and low cost. , Strong anti-electromagnetic interference ability, widely used in civil fields such as meteorology and vehicles, as well as military fields such as laser guidance and laser fuze. Among them, with the maturity of the manufacturing process of semiconductor lasers, the output power of semiconductor lasers continues to increase, and the cost continues to decrease, which has become a hot spot in the research and development of miniaturized lidars. Semiconduc...
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Login to View More IPC IPC(8): G01S17/02G01S17/10G01S17/06G01S17/58G01S7/486G01S7/481G01S7/48
CPCG01S17/02G01S17/10G01S17/58G01S17/06G01S7/4802G01S7/481G01S7/486
Inventor 陈勇黄家才丁文政卞荣李耀
Owner NANJING INST OF TECH