CN104236695A - Dynamic system multi-physics field imaging detection system - Google Patents
Dynamic system multi-physics field imaging detection system Download PDFInfo
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- CN104236695A CN104236695A CN201410421897.5A CN201410421897A CN104236695A CN 104236695 A CN104236695 A CN 104236695A CN 201410421897 A CN201410421897 A CN 201410421897A CN 104236695 A CN104236695 A CN 104236695A
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Abstract
The invention discloses a dynamic system multi-physics field imaging detection system which comprises a digital projection illuminating device. The digital projection illuminating device is arranged right in front of a measured vibration object, multi-spectral cameras are symmetrically arranged on the two sides of the digital projection illuminating device, and the surface of the measured vibration object radiates under the irradiation of the digital projection illuminating device. A synchronous sampling device controls the multi-spectral cameras to capture a radiance image of the measured vibration object at the same time, an image capture card is connected with the multi-spectral cameras to be used for collecting data and outputting the image data to an information storing device and an information processing system, the synchronous sampling device is connected to the information processing system, and the information processing system is a PC. According to the dynamic system multi-physics field imaging detection system, a digital projector is used for lighting, the synchronous sampling system is additionally arranged, so that measuring errors are reduced, and the measuring accuracy is improved; the wavelength measuring range is wide, a plurality of wavebands can be measured, the multiple physical quantities such as the vibration source temperature and the materials can be detected, and therefore the measuring reliability and the measuring precision are improved.
Description
Technical field
The present invention relates to a kind of system detecting vibration, particularly relate to a kind of dynamic system multiple physical field image-forming detecting system.
Background technology
With us, vibration also exists all the time.The vibration that automobile, train vibration influence produce; The vibration that tsunami, earthquake produce; Vibration of the space shuttle inner structure of flight etc.All closely bound up with the live and work of we mankind, so how to detect disadvantageous vibration accurately and fast, and Correct Analysis goes out result, is vital.
At present, people have invented the mode of many measuring vibrations, such as traditional contact and the contactless method for testing vibration based on laser, but these methods are all difficult to realize multispectral section, high precision vibration-testing.Wherein contact vibration-testing method needs adhered to by sensor (as accelerometer etc.) or paste the surface of measurand, and the vibration source special to some is difficult to detect.In addition, also there is the problem of " spot measurement " in contact vibration-testing method, and namely each sensor can only measure single-point vibration simultaneously.To realize target whole audience synchro measure, must at measured target surface mount sensor array, if when the size of measured target is larger, in array, the quantity of sensor is more, cause whole system complex structure, measuring process very loaded down with trivial details, and the spatial resolution of sensor array is not high.Contactless measurement based on laser comprises laser Doppler method and laser-holographic interferometry etc.Although laser method has the glitch-free advantage of measurand, but its single measurement region is still confined in the comparatively zonule of laser facula irradiation, still belong to the pattern of " spot measurement ", there is the limitation of foregoing " spot measurement " pattern too.
In prior art, although the measuring method based on machine vision solves above-mentioned subproblem, still there is a lot of problem, such as: due to the deficiency of general illumination system, the vibration of best bright finish and complex surface can not be detected preferably, accuracy of detection and accuracy low; Lack synchronized sampling unit, cause the error increasing follow-up process; Adopt common high speed camera to detect, its measure physical quantities is single, measures efficiency low.Wherein, camera shake pick-up unit designed by patent NO.200910170797.9, have employed the method for Machine Vision Detection vibration, but it adopts camera to be not multispectral camera, the requirement of high quality graphic can not be met, the information gathered, only containing image information, can not reflect the change of the physical quantitys such as the temperature of vibration source and material.Be difficult to realize multispectral section, high-precision vibration detection, have larger limitation.
Summary of the invention
The object of the invention is exactly the defect in order to make up prior art, provides a kind of dynamic system multiple physical field image-forming detecting system, realizes multispectral section, high-precision many physical quantitys vibration detection.
The present invention is achieved by the following technical solutions:
A kind of dynamic system multiple physical field image-forming detecting system, comprise digital projection lighting device, it is characterized in that: tested vibrating object dead ahead is provided with digital projection lighting device, digital projection lighting device symmetria bilateralis is provided with multispectral camera, tested vibrating object surface produces under the irradiation of digital projection lighting device has high-resolution, the spoke brightness of contrast and regular continuous distribution, synchronized sampling unit controls the spoke luminance picture that multispectral camera catches tested vibrating object simultaneously, image pick-up card connects multispectral camera image data, and output image data is to information-storing device and information handling system, described synchronous acquisition device is connected to information handling system, described information handling system is PC.
Described multispectral camera adopts beam separation type multispectral camera.
Described image pick-up card will with multispectral camera one_to_one corresponding.
Advantage of the present invention is:
1, the present invention is dynamic system multiple physical field image-forming detecting system, adds synchronous sampling system, can improve multispectral camera synchronized sampling precision, reduces image procossing error.
2, have employed digital projection lighting device, its system reliability is high, can produce the digital picture of high resolving power, high-contrast, keeps the colour purity of image simultaneously.
3, its multispectral camera adopted can for different coloud coding structures, carry out different-waveband imaging, survey original needs once to take now can complete by the image that repeatedly operation just can complete, and there is better image accuracy, again by image processing techniques and image fusion technology, carry out not by the extraction of band image information, realize the measurement of multiple physical quantity, break the limitation that in traditional measurement mode of vibration, spectrum and spatial information can not get both, thus improve the reliability and measuring accuracy measured.
Accompanying drawing explanation
Fig. 1 is principle of the invention schematic diagram;
Fig. 2 is structured flowchart of the present invention;
Wherein, 1 is vibration source, and 2 and 3 is multispectral camera, and 4 is digital projection lighting device, and 5 is image pick-up card, and 6 is synchronous device, and 7 is image pick-up card, and 8 is information memory, and 9 is message handler.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.As shown in Figure 1, 2, two (can be multiple) multispectral cameras 2 and 3 are placed in vibration source 1 dead ahead and keep suitable Distance geometry height, according to technical requirement, model can be adopted to be the multispectral camera of Condor-1000 MS5, it adopts the principle of prismatic decomposition, produce 5 independent light beams corresponding 5 CCD chip respectively, corresponding to red, green, blue and two infrared images.Wherein require that according to actual conditions Distance geometry height be all adjustable, by two multivariant foot rests, two multispectral cameras 2 and 3 are fixed, according to technical requirement, model can be adopted to be that the ball-shaped cloud platform of hunting figure G-08 is fixed, to can be used for the angle of adjustment two multispectral cameras 2 and 3 like this.Described two multispectral cameras 2 and 3 require to keep synchronous during image data, realize by synchronized sampling unit 6, wherein synchronous device 6 is employing external triggers, signal is sent by information handling system 9, through synchronization processing apparatus 6, make external trigger send two identical pulse signals simultaneously and trigger multispectral camera 2 and 3 and start shooting simultaneously.Described digital projection lighting device 4 is placed in the middle of two multispectral cameras 2 and 3, wherein according to technical requirement, it is the projector of Otto code A784 that projection lighting fixtures 4 can adopt based on model, its brightness reaches 4000 lumens, resolution is 1024X768, and contrast is up to 14000:1, and drop shadow effect is very outstanding, picture color is true to nature, meets the use needs of varying environment.Require that digital projection lighting device 4 need connect power supply separately, and digital projection lighting device 4 and two multispectral camera 2 and 3 keeping parallelisms, useable holder is erected, and can move forward and backward digital projection lighting device 4 or regulate its brightness according to actual requirement.By data line, two multispectral cameras 2 and 3 are connected to two image pick-up cards 5 and 7, according to technical requirement, the model that described image pick-up card 5 and 7 can adopt is X64 Xcelera-CL PX4, simultaneously will with multispectral camera 2 and 3 one_to_one corresponding, again two image pick-up cards 5 are connected with information memory 8 with 7 afterwards, finally receive message handler 9, namely PC.
The course of work of measuring vibrations of the present invention is: dynamic system multiple physical field image-forming detecting system of the present invention is placed in vibration source 1 front that will survey, suitable Distance geometry height is placed into according to actual conditions, open and regulate distance or the brightness of two multispectral cameras 2 and 3 and digital projection lighting device 4, guarantee collects image more clearly, require that digital projection device 4 is positioned over outside the visual field of two multispectral cameras 2 and 3 simultaneously, when vibration source 1 vibrates, signal processing system 9 is made to send Information Monitoring signal, the synchronized sampling unit 6 receiving signal makes two multispectral cameras 2 and 3 synchronized sampling, image pick-up card 5 and 7 starts Information Monitoring, information memory 8 is by corresponding information storage, finally process by information handling system 9 information obtained, analyze.
Claims (3)
1. a dynamic system multiple physical field image-forming detecting system, comprise digital projection lighting device, it is characterized in that: tested vibrating object dead ahead is provided with digital projection lighting device, digital projection lighting device symmetria bilateralis is provided with multispectral camera, tested vibrating object surface produces under the irradiation of digital projection lighting device has high-resolution, the spoke brightness of contrast and regular continuous distribution, synchronized sampling unit controls the spoke luminance picture that multispectral camera catches tested vibrating object simultaneously, image pick-up card connects multispectral camera image data, and output image data is to information-storing device and information handling system, described synchronous acquisition device is connected to information handling system, described information handling system is PC.
2. dynamic system multiple physical field image-forming detecting system according to claim 1, is characterized in that: described multispectral camera adopts beam separation type multispectral camera.
3. dynamic system multiple physical field image-forming detecting system according to claim 1, is characterized in that: described image pick-up card will with multispectral camera one_to_one corresponding.
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| CN105675115A (en) * | 2016-01-18 | 2016-06-15 | 佛山科学技术学院 | Laser Doppler online vibration testing system and method |
| CN107222708A (en) * | 2016-03-22 | 2017-09-29 | 杭州海康威视数字技术股份有限公司 | A kind of front end separates the image-forming detecting system of video camera |
| CN110749589A (en) * | 2019-11-26 | 2020-02-04 | 黎明职业大学 | Raman spectrum gem identification device and method thereof |
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| CN107222708A (en) * | 2016-03-22 | 2017-09-29 | 杭州海康威视数字技术股份有限公司 | A kind of front end separates the image-forming detecting system of video camera |
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| CN110749589A (en) * | 2019-11-26 | 2020-02-04 | 黎明职业大学 | Raman spectrum gem identification device and method thereof |
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Inventor after: Zhang Jin Inventor after: Deng Huaxia Inventor after: Zhao Chengyun Inventor after: Yu Liandong Inventor before: Zhang Jin Inventor before: Deng Huaxia Inventor before: Liang Chaojia Inventor before: Yu Liandong |
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Free format text: CORRECT: INVENTOR; FROM: ZHANG JIN DENG HUAXIA LIANG CHAOJIA YU LIANDONG TO: ZHANG JIN DENG HUAXIA ZHAO CHENGYUN YU LIANDONG |
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Application publication date: 20141224 |