Embedded ranging system based on binocular machine vision

A distance measuring system and machine vision technology, applied in the field of distance measurement, can solve the problems of large influence of surface color, mutual interference of ultrasonic waves, and low applicability

Inactive Publication Date: 2019-07-05
XUZHOU UNIV OF TECH
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  • Abstract
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Problems solved by technology

[0002] In the non-contact ranging system, the accuracy of ultrasonic ranging is low, and it is greatly affected by environmental factors such as temperature and wind direction. The surface of the measured object must be horizontal, and multiple ultrasonic waves will interfere with each other and cannot be detected at the same time.
The minimum detection distance of laser ranging is too large, it is difficult to measure objects at close distances, and it is greatly affected by the sun's rays and the surface color of the measured object
Traditional binocular vision distance measurement has low applicability due to the need for PC computing support

Method used

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  • Embedded ranging system based on binocular machine vision
  • Embedded ranging system based on binocular machine vision
  • Embedded ranging system based on binocular machine vision

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Embodiment Construction

[0042] The design principle of binocular machine vision

[0043] binocular detection

[0044] The principle of the binocular camera is similar to that of the human eye. The human eye can perceive the distance of an object because the two eyes have certain differences in the images presented by observing the same object. The farther the object is, the smaller the parallax will be; otherwise, the larger the parallax will be. The magnitude of parallax is linearly related to the distance between the eyes.

[0045] According to this principle, binocular detection requires a pair of cameras, called binocular cameras. The binocular camera can be placed anywhere in the environment, so a reference coordinate system should be selected in the environment to describe the position of the binocular camera. In the imaging system of the binocular camera, there are four coordinate systems, which are: Pixel coordinate system (u, v), imaging plane coordinate system (x, y), camera coordinate ...

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Abstract

The invention discloses an embedded ranging system based on binocular machine vision, which relates to the technical field of ranging. The embedded ranging system photographs a difference image by means of a binocular camera, transmits the difference image to Raspberry Pi and processes the difference image by adopting an OpenCV computer vision library, displays a ranging numerical value after a user selects a region, and has the advantages of convenient measurement and high applicability.

Description

technical field [0001] The invention relates to the technical field of ranging, in particular to an embedded ranging system based on binocular machine vision. Background technique [0002] In the non-contact ranging system, the accuracy of ultrasonic ranging is low, and it is greatly affected by environmental factors such as temperature and wind direction. The surface of the measured object must be horizontal, and multiple ultrasonic waves will interfere with each other and cannot be detected at the same time. The minimum detection distance of laser ranging is too large, it is difficult to measure objects at a closer distance, and it is greatly affected by the sun's rays and the surface color of the measured object. Traditional binocular vision distance measurement has low applicability due to the need for PC computing support. Contents of the invention [0003] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides an embed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C3/18
CPCG01C3/18
Inventor 张逸航滕道祥张宁滕腾杜浩宇徐洪亮
Owner XUZHOU UNIV OF TECH
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