Method and device for liquid surface wave detection based on linear array CCD and linear infrared laser
An infrared laser, liquid surface technology, used in measuring devices, using wave/particle radiation, measuring ultrasonic/sonic/infrasonic waves, etc., can solve the problem of insufficient range, and achieve the effect of improving frame rate, simple structure and simple operation.
Active Publication Date: 2015-07-15
BEIHANG UNIV
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Problems solved by technology
It solves the problem that the existing liquid surface wave detection method based on laser interference needs to strictly match the angle of the output and receiving parts of the optical path, and also solves the problem that the range of the liquid surface wave detection method based on scattered laser Doppler effect is not wide enough
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Embodiment Construction
[0048] An embodiment of a liquid surface wave detection device based on a linear array CCD and a linear infrared laser related to the present invention is as follows:
[0049] The hardware of the device can be composed of linear array CCD: TCD1209; linear array CCD signal processing chip: AD9943; CPLD: EPM240T100C5N; microcontroller: STM32F103RBT6 and PC ( image 3 hardware structure diagram).
[0050] The software in the microcontroller is responsible for collecting the level signal output by the CCD signal processing chip, converting the level signal into a pixel signal and saving it in the frame buffer, and then obtaining the frame data from the frame buffer, and performing software filtering on it , and finally get the coordinates of the center of the spot through the matching algorithm introduced above and send it to the PC through the serial port. The host computer software on the PC side is responsible for displaying the time-domain waveform of the surface wave, and pe...
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The invention relates to a method and device for liquid surface wave detection based on a linear array CCD and a linear infrared laser. The method comprises the following steps that laser rays emitted by a linear infrared laser device irradiate the liquid surface; after the laser rays is reflected by the liquid surface, the laser rays pass through a visible light filtering sheet and irradiates on the linear array CCD; after the linear array CCD receives an optical signal, the linear array CCD outputs a digital video signal, the coordinate of an upper light spot of the linear array CCD is worked out after image processing, the coordinate is sent to an upper computer, and the upper computer processes a measurement result and displays the measurement result. The device is composed of a laser-emitting module, a light ray position detection module and an image processing module. The method and device for liquid surface wave detection based on the linear array CCD and the linear infrared laser are used for detecting liquid surface waves.
Description
technical field [0001] The invention relates to a liquid surface wave detection method and device based on a linear array CCD and a linear infrared laser, belonging to the field of liquid surface wave detection. Background technique [0002] In physics, a surface wave is a mechanical wave that propagates along the interface of two different fluids. Liquid surface wave usually refers to a kind of mechanical wave propagating along the interface between liquid and air, which is usually formed after the liquid is disturbed. If the wavelength or amplitude of the liquid surface wave we study is relatively small, we cannot see it with the naked eye, which brings certain difficulties to the measurement of the liquid surface wave frequency. [0003] The current methods of measuring liquid surface waves mainly include contact measurement and non-contact measurement. Since the contact measurement method will introduce artificial interference to the water surface wave to be measured, ...
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IPC IPC(8): G01H9/00
Inventor 康一梅陈昱
Owner BEIHANG UNIV