Transmitting optical axis and receiving optical axis calibration method of laser radar
A technology of laser radar and calibration method, which is applied in the direction of radio wave measurement system, instrument, etc., can solve the problem that the laser trajectory and the reference height are greatly affected
Active Publication Date: 2020-10-23
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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However, this method is greatly affected by the trajectory of the laser and the reference height
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[0037] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0038] It should be noted that, in the description of the present invention, the terms "upper", "lower", "inner", "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which are only It is for convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operate in a specific orientation, and therefore, should not be construed as limiting the present invention. In addition, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.
[0039] It is found through experiments that the uniformity detection of the received signals in the four quadrants of the receiving window...
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The invention discloses a method for calibrating a transmitting optical axis and a receiving optical axis of a laser radar. The method comprises steps of carrying out the regional division of a receiving optical window of a telescope, and forming four quadrants; wherein the first quadrant and the second quadrant are in central symmetry, and the third quadrant and the fourth quadrant are in centralsymmetry; taking the first quadrant and the second quadrant as a group to independently receive echo signals respectively, collecting receiving signals of the two quadrants, and adjusting a transmitting optical axis of the laser radar to incline towards the quadrant with small receiving signals till the receiving signals of the two quadrants are equivalent; and taking the third quadrant and the fourth quadrant as a group to independently receive echo signals respectively, collecting receiving signals of the two quadrants, and adjusting a transmitting optical axis of the laser radar to inclinetowards the quadrant with small receiving signals till the receiving signals of the two quadrants are equivalent. The method is advantaged in that calibration of the transmitting optical axis and thereceiving optical axis of the laser radar is realized by detecting uniformity of the receiving signals of the four quadrants of the telescope, the collimation effect is good, and efficiency is high.
Description
technical field [0001] The invention belongs to the technical field of laser radar, and in particular relates to a method for calibrating the emitting optical axis and receiving optical axis of the laser radar. Background technique [0002] LiDAR is an active remote sensing monitoring device, which has the advantages of high temporal and spatial resolution and high measurement accuracy. In the lidar system, the collimation of the receiving and receiving optical axes is the key to ensure the efficiency of lidar signal reception. In the actual work of laser radar, due to temperature changes, environmental vibration, laser jitter and other reasons, the emission optical axis of the laser will deviate from the receiving optical axis of the telescope, resulting in a decrease in the efficiency of receiving signals and signal distortion. Therefore, it is necessary to periodically monitor the laser radar Carry out the calibration of the receiving and receiving optical axis. The so-...
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Login to View More IPC IPC(8): G01S7/497
CPCG01S7/497Y02A90/10
Inventor 陈超王章军李先欣李辉庄全风潘新王秀芬张锋赵阳
Owner OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI