CN102944693A - System and method based on area array fast field synchronization charge coupled device (CCD) image sensor and used for measuring speed - Google Patents
System and method based on area array fast field synchronization charge coupled device (CCD) image sensor and used for measuring speed Download PDFInfo
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- CN102944693A CN102944693A CN2012104946827A CN201210494682A CN102944693A CN 102944693 A CN102944693 A CN 102944693A CN 2012104946827 A CN2012104946827 A CN 2012104946827A CN 201210494682 A CN201210494682 A CN 201210494682A CN 102944693 A CN102944693 A CN 102944693A
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Abstract
The invention provides a system and method based on an area array fast field synchronization charge coupled device (CCD) image sensor and used for measuring speed and relates to a speed measuring system and a speed measuring method. The system and method solves the problem in the prior art of being low in measuring efficiency due to long image obtaining time and low in measuring precision due to effects of scanning kinematic accuracy. The system is characterized in that an image signal output end of the area array fast field synchronization CCD image sensor is connected through an image signal input end of a high-speed data port; a single-chip microcomputer controls the area array fast field synchronization CCD image sensor; and the single-chip microcomputer controls synchronization of the high-speed data port. The method includes that the area array fast field synchronization CCD image sensor shoots N frames of images of an object moving along a fixed track continuously according to time intervals; an upper computer calculates a total moving distance of the object moving along the fixed track by comparing every two adjacent frames of images; and the speed and acceleration of the object moving along the fixed track are calculated. The system and method is applicable to speed measuring of moving objects.
Description
Technical field
The present invention relates to a kind of velocity-measuring system and speed-measuring method.
Background technology
Along with the develop rapidly of computer technology, the further investigation of computer vision technique and dynamic image treatment theory is so that surveying instrument and measuring technology have produced dramatic change.Computing machine relies on its fast operation, and functional reliability is high, in today of modern test technology fast development, has become requisite important component part in the automatic checkout system.Fast-developing and further investigation along with the computer vision technique digital image processing techniques, utilize the method for mechanical vision inspection technology and Digital Image Processing that moving target is carried out acquisition and tracking and kinematic parameter extraction, all will become a kind of very potential measurement measuring technology, and a lot of field is all in the urgent need to these thermometrically technology.Also will become the forward position direction that receives much concern in the in recent years computer vision field and digital image processing techniques based on the moving object detection and tracking technology of video.It detects Tracking Recognition from the image of moving object, thereby obtains required data, belongs to the category of digital image analysis and processing.Simultaneously, from dynamic scene Fast Segmentation is carried out in moving object and extract, the processing that light is changed the problems such as background complexity also detects to the moving object video and has brought certain challenge.
Progress along with hardware technology, the online contactless measurement of rotational speed that utilizes linear CCD technology to carry out high-speed, high precision progressively becomes a reality, because testing the speed, line array CCD adopt image measuring method to realize, similar to traditional camera measuring technique, as long as therefore just can take and can measure, CCD tests the speed and can not be subjected to the material of testee, surface configuration, the impact of surface contamination cooperates suitable optical lens can also realize that through-fall mist dust measures.And the line array CCD shooting speed is fast, high speed linear array CCD camera per second can be taken more than 100,000 times, even can measure the speed of bullet, and cheap ordinary lines array CCD camera also can reach the shooting speed of per second 10,000 times, can be with the cost near the ultrasonic Doppler velocity-measuring system, realization is near precision and the speed of laser Dppler veloicty measurement, and this has obvious advantage so that the CCD velocity measuring technique is compared with other non-cpntact measurement equipment.But to obtain two dimensional image with line array CCD, must be equipped with scanning motion, and in order to determine the correspondence position of each pixel of image on measured piece, also must be equipped with the device such as grating with the coordinate of each scan line of record line array CCD.Utilize line array CCD that following weak point is arranged: the Image Acquisition time is long, and the efficient of measurement is low; The precision of images may be subjected to the impact of scanning motion precision and reduce, and finally affects measuring accuracy.
Summary of the invention
The present invention is low in order to solve the long measurement efficient that causes of the Image Acquisition time of adopting the line array CCD speed-measuring method, and owing to be subjected to the impact of scanning motion precision to cause the low problem of measuring accuracy, thereby the velocity-measuring system of a kind of the synchronous ccd image sensor of battle array Fast Field is provided.
Based on the velocity-measuring system of the synchronous ccd image sensor of face battle array Fast Field, it comprises image capture module 1 and host computer 2; Image capture module 1 comprises the synchronous ccd image sensor 11 of face battle array Fast Field, single-chip microcomputer 12 and high speed interface 13:
The synchronous ccd image sensor of face battle array Fast Field 11 is used for taking the image of the object that moves along fixation locus; The image signal output end of described the synchronous ccd image sensor 11 of battle array Fast Field connects by the picture signal input end of high speed interface 13;
The CCD control signal output terminal of single-chip microcomputer 12 is connected with the control signal input end of the synchronous ccd image sensor 11 of face battle array Fast Field; Described single-chip microcomputer 12 synchronous control signal output terminals are connected with the control signal input end of high speed interface 13.
Use the speed-measuring method based on the synchronous ccd image sensor of face battle array Fast Field of said apparatus, it is realized by following steps:
Step 1, the synchronous ccd image sensor 11 of employing single-chip microcomputer 12 opposite battle array Fast Fields are set the shooting time intervals;
The time interval that step 2, the synchronous ccd image sensor 11 of employing face battle array Fast Field are set by step 1 is taken the N two field picture continuously to the object that moves along fixation locus; N is the integer more than or equal to 2;
Step 3, the synchronous ccd image sensor 11 of face battle array Fast Field are sent to host computer 2 with the N two field picture of taking by high speed interface, and the moving object in 2 pairs of N two field pictures of host computer is identified; And calculate the total move distance of object in the N two field picture that moves along fixation locus by the mode of relatively every adjacent two two field pictures; And then the velocity and acceleration of the object that moves along fixation locus of computing machine.
The present invention be a kind of synchronous ccd image sensor of face battle array Fast Field that adopts as the speed-measuring method of image capture device, with respect to adopting the line array CCD speed-measuring method, the Image Acquisition time of the present invention is short, measures efficient high; And the present invention is subjected to the impact of scanning motion precision lower, and measuring accuracy is high, good stability.
Description of drawings
Fig. 1 is the velocity-measuring system principle schematic based on the synchronous ccd image sensor of face battle array Fast Field of the present invention.
Embodiment
Embodiment one, in conjunction with Fig. 1 this embodiment is described, based on the velocity-measuring system of the synchronous ccd image sensor of face battle array Fast Field, it comprises image capture module 1 and host computer 2; Image capture module 1 comprises the synchronous ccd image sensor 11 of face battle array Fast Field, single-chip microcomputer 12 and high speed interface 13;
The synchronous ccd image sensor of face battle array Fast Field 11 is used for taking the image of the object that moves along fixation locus; The image signal output end of described the synchronous ccd image sensor 11 of battle array Fast Field connects by the picture signal input end of high speed interface 13;
The CCD control signal output terminal of single-chip microcomputer 12 is connected with the control signal input end of the synchronous ccd image sensor 11 of face battle array Fast Field; Described single-chip microcomputer 12 synchronous control signal output terminals are connected with the control signal input end of high speed interface 13.
The speed-measuring method based on the synchronous ccd image sensor of face battle array Fast Field of embodiment two, use embodiment one, it is realized by following steps:
Step 1, the synchronous ccd image sensor 11 of employing single-chip microcomputer 12 opposite battle array Fast Fields are set the shooting time intervals;
The time interval that step 2, the synchronous ccd image sensor 11 of employing face battle array Fast Field are set by step 1 is taken the N two field picture continuously to the object that moves along fixation locus; N is the integer more than or equal to 2;
Step 3, the synchronous ccd image sensor 11 of face battle array Fast Field are sent to host computer 2 with the N two field picture of taking by high speed interface, and the moving object in 2 pairs of N two field pictures of host computer is identified; And calculate the total move distance of object in the N two field picture that moves along fixation locus by the mode of relatively every adjacent two two field pictures; And then the velocity and acceleration of the object that moves along fixation locus of computing machine.
The shooting time that adopts the synchronous ccd image sensor 11 of single-chip microcomputer 12 opposite battle array Fast Fields to set in the step 1 is spaced apart 4ms.
It is to adopt the background subtraction point-score to realize that moving object in 2 pairs of N two field pictures of host computer described in the step 3 is identified.
Principle: image capture module of the present invention is: the function of Single Chip Microcomputer (SCM) system mainly is the control of finishing image acquisition process, under the control of single-chip microcomputer, the cycle of CCD field sync signal (interval) is adjusted to 4ms by original 20ms, that is: every 4ms, the CCD camera is taken a picture.Suppose the object 4s that altogether moved, 1000 pictures have just been arranged in this process so, in the interval time between every width of cloth picture, object is considered as uniform motion.The Digital Image Data that CCD produces is transferred to host computer through parallel interface at a high speed.Then adopt the background subtraction point-score, identify the object of motion, utilize video camera to demarcate in advance good background, more adjacent two two field pictures, can in the scope of being taken, calculate the distance of fixation locus moving object, obtain the distance of object of which movement in 4ms, again according to speed and Acceleration Formula, calculate speed and the acceleration of moving image, just can obtain at last the velocity and acceleration of moving object according to the distance of CCD camera and target object.
The workflow of system is: after the image process CCD of moving object gathers and comes, the field sync signal of Single-chip Controlling CCD is come the collection of control chart picture, gather the signal that comes and convert data image signal to through A/D, then data communication device is crossed at a high speed parallel interface and is transferred to host computer and carries out view data and process, again moving target is detected, just can calculate by Computer move distance, speed and the acceleration of object.
Stable performance of the present invention, precision is higher, can measure object by speed, the acceleration of static setting in motion.
Claims (4)
1. based on the velocity-measuring system of the synchronous ccd image sensor of face battle array Fast Field, it is characterized in that: it comprises image capture module (1) and host computer (2); Image capture module (1) comprises the synchronous ccd image sensor of face battle array Fast Field (11), single-chip microcomputer (12) and high speed interface (13);
The synchronous ccd image sensor of face battle array Fast Field (11) be used for to be taken the image of the object that moves along fixation locus; The image signal output end of described the synchronous ccd image sensor of battle array Fast Field (11) connects by the picture signal input end of high speed interface (13);
The CCD control signal output terminal of single-chip microcomputer (12) is connected with the control signal input end of the synchronous ccd image sensor of face battle array Fast Field (11); Described single-chip microcomputer (12) synchronous control signal output terminal is connected with the control signal input end of high speed interface (13).
2. right to use requires 1 the speed-measuring method based on the synchronous ccd image sensor of face battle array Fast Field, it is characterized in that it is realized by following steps:
Step 1, employing single-chip microcomputer (12) the synchronous ccd image sensor of opposite battle array Fast Field (11) are set the shooting time interval;
The time interval that step 2, the synchronous ccd image sensor of employing face battle array Fast Field (11) are set by step 1 is taken the N two field picture continuously to the object that moves along fixation locus; N is the integer more than or equal to 2;
Step 3, the synchronous ccd image sensor of face battle array Fast Field (11) are sent to host computer (2) with the N two field picture of taking by high speed interface, and host computer (2) is identified the moving object in the N two field picture; And calculate the total move distance of object in the N two field picture that moves along fixation locus by the mode of relatively every adjacent two two field pictures; And then the velocity and acceleration of the object that moves along fixation locus of computing machine.
3. the speed-measuring method based on the synchronous ccd image sensor of face battle array Fast Field according to claim 2 is characterized in that the shooting time that adopts single-chip microcomputer (12) the synchronous ccd image sensor of opposite battle array Fast Field (11) to set in the step 1 is spaced apart 4ms.
4. the speed-measuring method based on the synchronous ccd image sensor of face battle array Fast Field according to claim 2 is characterized in that it is to adopt the background subtraction point-score to realize that host computer described in the step 3 (2) is identified the moving object in the N two field picture.
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| WO2014206274A1 (en) * | 2013-06-24 | 2014-12-31 | Tencent Technology (Shenzhen) Company Limited | Method, apparatus and terminal device for processing multimedia photo-capture |
| CN106546765A (en) * | 2016-10-28 | 2017-03-29 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Digitized racing measurement apparatus based on water slide |
| CN106768987A (en) * | 2017-02-28 | 2017-05-31 | 广西电网有限责任公司桂林供电局 | The multi-target tracking method of the breaker test system being imaged with high-speed cmos |
| CN107462741A (en) * | 2017-07-26 | 2017-12-12 | 武汉船用机械有限责任公司 | A kind of moving object speed and acceleration measurement device |
| CN108051609A (en) * | 2017-12-07 | 2018-05-18 | 南京大学 | A kind of speed measuring device and method based on single-photon avalanche detector lines array camera |
| CN109085374A (en) * | 2018-07-27 | 2018-12-25 | 江苏科技大学 | The multiple spot speed measuring device and its speed-measuring method for slow-speed of revolution system based on kinect |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2014206274A1 (en) * | 2013-06-24 | 2014-12-31 | Tencent Technology (Shenzhen) Company Limited | Method, apparatus and terminal device for processing multimedia photo-capture |
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| CN108051609A (en) * | 2017-12-07 | 2018-05-18 | 南京大学 | A kind of speed measuring device and method based on single-photon avalanche detector lines array camera |
| CN109085374A (en) * | 2018-07-27 | 2018-12-25 | 江苏科技大学 | The multiple spot speed measuring device and its speed-measuring method for slow-speed of revolution system based on kinect |
| CN109085374B (en) * | 2018-07-27 | 2020-06-16 | 江苏科技大学 | Kinect-based multi-point speed measuring device for low-rotating-speed system and speed measuring method thereof |
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