Research On The Synchronization Controland Datacommunication Technology For The High Speed Cameras

With the rapid development of science,sports test equipment which is applied to agriculture, transport, industry, medical treatment, aviation and other fields demands higher detection accuracy and agiler detection mode.In order to meet these demands, the 3-D motion detection technology and equipment have made considerable progress over the past few years. They are applied widely to electronic industry, machine building, aviation, medical rehabilitation, transport supervision, athletic sport analysis, virtual reality and other 3-D motion detection tasks.Moreover, the 3-D sport measure technology based on vision, as a totally new sport measure form, liberates sport measure sport measure from restrains of traditional contact-type measure, and exploits the new idea of resolving numerous problems in sport measure field.With appearance of high-speed of camera, one of the key problems people are facing is plenty of data, which makes requests to the manner of transmission.Using CA-D6 high-speed camera from Canada DALSA Corporation as image source, this paper raises embedded image acquisition and manipulating framework structure based on FPGA+DSP+ARM, and realizes high-speed image acquisition, pretreatment, extraction and position of feature, and Ethernet data communication. Moreover, it makes use of FPGA of cyclone II series from ALTERA Corporation to process data sent by camera in advance which causes data size to decrease. Then, treating images with algorithm through 6000 series chips from TI Corporation, on that basis, the data transmit to ARM9 series which is designed in this paper from ATMEL Corporation as feature boards of core chip.The paper designs relative electro circuit around AT91RM9200: power on reset, JTAG , interface, and also the interface which communicates with DSP, the MII interface which communicates with Ethernet alternating chips.Using ADS1.2 programming tools, it writes internet program and programs that is aimed to Ethernet alternating chips DP83640, which makes the data communicates with upper monitor through Ethernet transportation.This paper states program downloading and debugging for hardware, and tests that two IP are communicating with each other by making use of WireShark, and the ARM feature boards can work successfully.In terms of communication technology of multi-camera, it investigates time synchronization protocol IEEE1588 theoretically and its advantages compared with previous net time protocol, which lays the foundations of the research of multi-camera synchronous transmission.