Laser range finder operating distance evaluation method

A laser distance finder, a technology of working distance, which is applied in measurement devices, re-radiation, radio wave measurement systems, etc. sexual effect

CN112285726APending Publication Date: 2021-01-29LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-01-29

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Abstract

The invention relates to a laser range finder operating distance evaluation method which is used for evaluating the performance of the laser range finder in an airborne photoelectric detection field.The method comprises the following steps: testing reflectivity and atmospheric visibility; determining laser transmitting power, a beam divergence angle, transmittance of a transmitting system and a receiving system, an optical effective aperture of the receiving system and sensitivity of a receiving detector; calculating atmospheric transmissivity and an included angle between ranging light and atarget surface normal; calculating the power received by the range finder detector according to the obtained parameters; judging whether the power value is equal to detector sensitivity or not, and if so, outputting an action distance value; if the power value is less than the detector sensitivity, replacing the minimum search value with an iterative value, otherwise, replacing the maximum searchvalue with the iterative value; and continuing the above processes till that the obtained power value is equal to the sensitivity of the detector, and determining that the iteration value is the action distance value. The evaluation efficiency and reliability of an operating distance of the laser range finder are greatly improved.
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Description

technical field

[0001] The invention belongs to the field of airborne photoelectric detection and confrontation, and relates to a method for evaluating the action distance of a laser range finder in an airborne photoelectric detection system. Background technique

[0002] The laser rangefinder has the advantages of high ranging accuracy, fast ranging speed, and non-contact. It is an important functional unit of the positioning and orientation of the airborne photoelectric detection system. The performance evaluation method of the laser range finder is an important means for the index design demonstration and performance evaluation of the laser range finder.

[0003] At present, there are no relevant patents on the evaluation of the laser range finder's action distance in China. For example, the patent (CN 103424191) The detection distance estimation method of point target infrared imaging involves an evaluation of the action distance of an infrared sensor, which also uses a ...

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Embodiment Construction

[0040] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0041] Such as figure 1 As shown, a method for evaluating the working distance of a laser rangefinder includes the following 11 steps:

[0042] (1) Step 1: target reflectivity measurement;

[0043] Use the reflectivity tester to test the reflectivity of the target to the 1.064um laser.

[0044] (2) Step 2: Atmospheric visibility measurement;

[0045] Use the atmospheric visibility tester to test the atmospheric visibility of the current environment.

[0046] (3) Step 3: Determine the system parameters of the laser range finder

[0047] Determine the laser emission power, beam divergence angle, transmission system and receiving system transmittance, optical effective aperture of the receiving system, and sensitivity of the receiving detector according to the design indicators of the evaluated rangefinder.

[0048] (4) Step 4: Preset Rmin, Rmax

[0049] The m...