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Laser triangular ranging system and method

A technology of laser triangulation and laser device, which is applied in the direction of radio wave measurement system, measurement distance, measurement device, etc., can solve the problems such as the influence of measurement accuracy, achieve the goal of improving resistance, eliminating the instability of measurement accuracy, and solving the problem effect of object color

Pending Publication Date: 2019-03-15
SHANGHAI LANBAO SENSING TECH
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Problems solved by technology

[0007] In view of the deficiencies in the above-mentioned prior art, the present invention provides a laser triangulation ranging system and method, which can reduce the spot distortion caused by the large incident angle, make the spot on the receiving surface Gaussian distribution, and fundamentally solve the problem of Solved the problem that the measurement accuracy is affected by the color of the target object

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  • Laser triangular ranging system and method

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Embodiment Construction

[0026] Below according to the accompanying drawings figure 1 with figure 2 , give a preferred embodiment of the present invention, and give a detailed description, so that the functions and characteristics of the present invention can be better understood.

[0027] see figure 1 , a laser triangulation ranging system according to an embodiment of the present invention, comprising a microprocessor 1, a laser device 2, a wedge-shaped bandpass filter 3, a receiving lens 4, an aperture 5, and a photosensitive device 6; The microprocessor 1 connects the laser device 2 and the photosensitive device 6; the wedge-shaped bandpass filter 3, the receiving lens 4 and the photosensitive device 6 are sequentially arranged on the same straight line; the diaphragm 5 is arranged on the straight line. In this embodiment, the microprocessor 1 adopts the STM32F3 series, and in other embodiments, other types of microprocessors 1 can also be used.

[0028] Among them, the role of the wedge-shape...

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Abstract

The invention provides a laser triangular ranging system and method, wherein the system comprises a microprocessor, a laser device, a wedge-shaped band-pass filter, a receiving lens, a diaphragm and aphotosensitive device; the microprocessor is connected with the laser device and the photosensitive device; the wedge-shaped band-pass filter, the receiving lens and the photosensitive device are sequentially arranged on the same straight line; the diaphragm is arranged on the straight line. According to the laser triangular ranging system and the method, the phenomenon of light spot distortion caused by large incident angle can be reduced, so that the light spots are distributed on a receiving surface in a Gaussian manner, and the problem that the measurement precision is influenced by the color of a target object is fundamentally solved.

Description

technical field [0001] The invention relates to the field of optical measurement sensors, in particular to a laser triangulation ranging system and method. Background technique [0002] The ranging sensor based on the principle of laser triangulation ranging has excellent characteristics such as high resolution, fast speed, and non-contact, and is widely used in the field of high-precision photoelectric detection. [0003] In the laser triangulation ranging sensor, the light spot has a certain size on the photosensitive device, and the center position of the imaging light spot needs to be found through software algorithms such as binary method and gray scale centroid method. These methods are all based on the assumption that the energy of the imaging spot is Gaussian distributed. [0004] In the traditional laser triangulation ranging sensor, the signal intensity corresponding to the imaging spot of the diffuse reflection light of different color targets on the photosensiti...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/48G01S17/89G01S7/481
CPCG01S7/481G01S17/48G01S17/89
Inventor 许永童许用疆谢勇马路明
Owner SHANGHAI LANBAO SENSING TECH
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