Laser scanning device and angle measurement sensor and method based on laser scanning

A technology of laser scanning device and angle measuring sensor, which is applied in the direction of using optical devices, measuring devices, instruments, etc., and can solve problems such as difficult to meet the angle deflection range, stray light, and the influence of photodetector measurement results

Pending Publication Date: 2021-06-08
BEIFANG UNIV OF NATITIES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The application number is 202110202949X, and the patent application titled "A Novel Sensor Based on Time Angle Measurement and Its Angle Measurement Method" The optical waveguide array device used in the patent application has a wide range of laser deflection angles, but its principle causes it to produce Other stray light will affect the measurement results of the photodetector
When choosing a conventional crystal to realize laser deflection, its deflection angle range is small, and it is difficult for many application fields to meet the requirements of the angle deflection range

Method used

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  • Laser scanning device and angle measurement sensor and method based on laser scanning
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  • Laser scanning device and angle measurement sensor and method based on laser scanning

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Embodiment 1

[0057] The present invention is realized through the following technical solutions, as figure 1 As shown, a laser scanning device is proposed, including a laser, a laser angle deflection device, a prism, and a laser measuring device, wherein:

[0058] A laser is used to emit a laser with a fixed wavelength to the laser angle deflection device;

[0059] The laser angle deflection device is used to change the exit angle of the laser emitted by the laser, and emit the laser with the changed exit angle to the prism;

[0060] The prism is used to expand the angle of the laser light emitted by the laser angle deflection device, so that the angle between the two laser beams before and after the fixed time interval T increases;

[0061] The laser measuring device is used to receive the laser beam whose angle is enlarged by the triangular prism, and record the incident positions of the two laser beams before and after a fixed time interval T.

[0062] See figure 1 , where the solid ...

Embodiment 2

[0069] The present invention also proposes an angle measuring sensor based on laser scanning, including a measuring head and a polygonal regular prism. The measuring head includes a laser, a laser angle deflection device, a first prism, and a measuring photoelectric detector, wherein:

[0070] A laser is used to emit a laser with a fixed wavelength to the laser angle deflection device;

[0071] The laser angle deflection device is used to change the exit angle of the laser emitted by the laser, and emit the laser with the changed exit angle to the polygonal regular prism;

[0072] The first triangular prism is used to expand the angle of the laser light reflected by the polygonal regular prism, so that the angle between the two laser beams before and after the fixed time interval T increases;

[0073] The measurement photodetector is used to receive the laser light whose angle has been expanded by the first triangular prism, and record the incident positions of the two beams o...

Embodiment 3

[0087] The present invention also proposes a method for measuring angles based on laser scanning, comprising the following steps:

[0088] Step S1: at any time, the laser angle deflection device changes the exit angle of the laser emitted by the laser, and emits the laser with the changed exit angle to the polygonal regular prism, and the laser is reflected by the polygonal regular prism to the incident side of the first triangular prism, The first triangular prism changes the angle of the laser light, and transmits it to the measurement photodetector from its exit side, and at this time, the measurement photodetector records the incident position x1 of the laser light.

[0089] At this moment, the laser angle deflection device changes the exit angle of the laser emitted by the laser, and sends the laser with the changed exit angle to the beam splitter. side, the second triangular prism changes the angle of the laser light, and transmits it to the reference photodetector from it...

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Abstract

The invention aims to improve the angle measurement precision and reduce the measurement cost, and relates to a laser scanning device and an angle measurement sensor and method based on laser scanning, and the device comprises a laser which is used for transmitting laser with a fixed wavelength to a laser angle deflection device; a laser angle deflection device used for changing the emergent angle of the received laser and transmitting the laser of which the emergent angle is changed to the triangular prism; a triangular prism used for enlarging the angle of the laser emitted by the laser angle deflection device, so that the angle between the two laser beams before and after the fixed time interval is enlarged, namely the included angle of the laser emitted by the laser angle deflection device is further enlarged; and a laser measuring device used for receiving the laser of which the angle is enlarged by the triangular prism and recording the incident positions of the two beams of laser before and after a fixed time interval T.

Description

technical field [0001] The invention relates to the technical field of angle measurement, in particular to a laser scanning device, an angle measurement sensor and a method based on laser scanning. Background technique [0002] At present, gratings are often used as measuring elements for high-precision angle measurement, but the accuracy of gratings is limited by the grating line density and line accuracy, and it is currently difficult to further improve its measurement accuracy. The angle measurement sensor based on optical arm amplification proposed by the applicant also relies on high-precision position-sensitive detectors, which are also difficult for domestic manufacturers to manufacture. [0003] The time grating invented by Professor Peng Donglin of Chongqing University of Technology uses a rotating magnetic field as a motion reference system. The uniform velocity and stability of the rotating magnetic field affect the measurement accuracy. [0004] The application ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/26
CPCG01B11/26
Inventor 张白高峰张巍巍刘锋
Owner BEIFANG UNIV OF NATITIES
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