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Two-dimensional optical displacement sensor

A displacement sensor and optical technology, applied in the direction of optical devices, instruments, measuring devices, etc., to achieve the effects of easy real-time online automatic measurement, low production cost, and simple structure principle

Active Publication Date: 2019-12-20
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0003] The purpose of the present invention is to propose a two-dimensional optical displacement sensor to solve the problem of two-dimensional displacement sensing detection

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  • Two-dimensional optical displacement sensor

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Embodiment Construction

[0014] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0015] A two-dimensional optical displacement sensor includes a light source 1, a first sensing unit, a polarization beam splitting prism 5, a photodetector, a divider and a second sensing unit.

[0016] Both the first sensing unit and the second sensing unit are composed of a transparent right-angle prism, a polarizing beam splitting film and a right-angle prism made of a transparent optically active material.

[0017] The first sensing unit is composed of a transparent right-angle prism 2 , a polarizing beam splitting film 3 and a right-angle prism 4 made of a transparent optically active material. The directions indicated by the left and right arrows in the right-angle prism 4 indicate that when the light is transmitted along this direction, the polarization plane of the light will be rotated. The second sensing unit is composed ...

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Abstract

A two-dimensional optical displacement sensor is characterized in that light rays emitted by a light source pass through a first sensing unit and are divided into two optical paths by means of a polarization beam splitting film; one optical path is divided into two optical paths by means of a polarization beam splitting prism, the two optical paths are respectively measured by using a photoelectric detector; measurement data is transmitted to a division arithmetic unit for processing; the other optical path enters a second sensing unit and is divided into two optical paths, and the two opticalpaths are respectively measured by means of a photoelectric detector; measurement data is transmitted to a division arithmetic unit for processing; and two-dimensional mobile information of the firstsensing unit is judged according to the data change processed by means of the two division arithmetic units. The two-dimensional optical displacement sensor adopts a double-optical-path signal detection technology, can eliminate the influence factors such as light source luminous power fluctuation and light intensity absorption; by adopting the optical method, the two-dimensional optical displacement sensor is not interfered by environmental factors such as electromagnetism, and the defects of a common electromagnetic displacement sensor are overcome; and the two-dimensional optical displacement sensor has the advantages of simple structure principle and low manufacturing cost, and is easy to realize real-time online automatic measurement.

Description

technical field [0001] The invention belongs to the technical field of photoelectric detection, photoelectric sensing and optical information processing, and in particular relates to a two-dimensional optical displacement sensor. Background technique [0002] Displacement is one of the common and important physical quantities in engineering inspection. Physical quantities such as stress, temperature, and velocity can be indirectly measured through displacement detection. Displacement detection technology is a detection method that converts displacement into other measurable physical quantities that have a definite relationship with it. With the development of industrial technology, displacement detection has become very important and widely used, such as scientific and technological measurement, automatic devices, machine tool control, etc. Displacement sensors are mainly divided into two types: contact type and non-contact type. Contact type displacement sensors are genera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/02
CPCG01B11/02
Inventor 沈骁
Owner NANJING UNIV OF POSTS & TELECOMM
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