Liquid level measurement system and method based on monocular vision
A technology of liquid level measurement and monocular vision, applied in the field of image information, can solve problems such as complex operation, failure, and limited measurement range
Active Publication Date: 2020-02-07
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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[0003] In order to solve the technical problems that the traditional liquid level gauge will fail when the liquid temperature is lower than -40°C, the measurement range is limited, the operation is complicated, and it is easy to age, the present invention provides a liquid level measurement system and method based on monocular vision
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[0104] The following will clearly and completely describe the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts all belong to the protection scope of the present invention.
[0105] like figure 1 As shown, the liquid level measurement system based on monocular vision provided by the present invention includes a laser, a monocular camera, an image acquisition unit, an image compression unit, a host computer display unit and an image processing unit;
[0106] There are three lasers, which are set above the measured liquid surface. The connection line of the three lasers is triangular, and is used to irradiate the measured liquid surface from three different directions, thus forming t...
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In order to solve the problems that a traditional liquid level meter fails when liquid temperature is lower than -40 DEG C, the measurement range is limited, the operation is complicated and the agingis easy, the invention provides a liquid level measurement system and method based on monocular vision. Three lasers with fixed positions are fixed to the periphery of a camera, laser beams are emitted to a liquid level, the centroid extraction of light spots on the liquid level is completed through a series of algorithms for liquid level image processing, and finally, the final liquid level measurement of the liquid level is completed through internal parameters of the camera and extracted light spot centroid pixel coordinates. The working temperature range of the system is not limited and can be as low as -100 DEG C, meanwhile, the measurement range is flexible and can reach dozens of meters to hundreds of meters and far exceeds that of a traditional liquid level meter, the measurementerror can be controlled within 1%, the precision requirement can be met, and meanwhile, the cost is low, and the operation is easy.
Description
technical field [0001] The invention belongs to the technical field of image information, and relates to a liquid level measurement system and method based on monocular vision, which are used for real-time and accurate measurement of the liquid level in a storage tank. Background technique [0002] At present, the liquid level measurement of the liquid level is based on the liquid level gauge. The traditional liquid level gauge can only work in the working environment above -40°C. When the liquid temperature is lower than -40°C, the liquid level gauge will fail. The measurement range of the level gauge is up to 30m, and the measurement range is limited; in addition, the traditional level gauge also has problems such as high price, many parameters need to be set for the instrument, complicated operation, and easy aging. Contents of the invention [0003] In order to solve the technical problems that the traditional liquid level gauge will fail when the liquid temperature is...
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IPC IPC(8): G01F23/292G06T7/13G06T7/187G06T7/66G06T7/80G06T5/00
CPCG01F23/292G06T7/13G06T7/187G06T7/66G06T7/80G06T5/80
Inventor 任龙张辉张高鹏宋晓东张海峰
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI