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 Wysłany: Nie 18:28, 28 Lis 2010 Temat postu: ghd deutschland VXI bus, High Speed Data Acquisiti |
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VXI bus, High Speed Data Acquisition Module Design and Implementation
1206 timing diagram analysis, FPGA use the FIFO filled the first piece of THS1206 issued Data_ (DataAvailable) interrupt as a trigger signal, the signal acquisition sequence on separate ways. Through careful analysis of Figure 4, combined with 48 logic timing signal acquisition,[link widoczny dla zalogowanych], in order to achieve real-time display that data to be synchronized with the signal acquisition process. In addition, to minimize the leakage of mining,[link widoczny dla zalogowanych], extraction or wrong, the transmission timing delay is used in the design process of three Data-signal before transmission start timing, the amount of data each time for the 240Kx8Bits. Figure 5 is an arbitrary sinusoidal input signal all the way, after sampling, after transmission of data drawn from the curve. It can be seen from the curves, the use of collection, transmission of data obtained after drawn 0204060801O0120140 Figure 5 after treatment by sampling data from the transmission curve drawn curves basically can not reproduce the input signal distortion. 3 Conclusion In summary, the use of FPGA high-speed, multi-channel data acquisition system with other components of incomparable advantages: (1) has a large number of I / 0 pins, and strong load capacity; (2) internal resource-rich, fast processing speed, enabling the design of complex algorithms; (3) the internal signal delay device, thereby helping to improve the signal integrity and interference; (4) devices with low power consumption (2.5V / 3. 3V,[link widoczny dla zalogowanych], good electrical compatibility. Therefore, give full play to the advantages of FPGA, so the task of modern underwater high-speed processing services, and has broad prospects and practical significance. References: [1】 Yu Renjie, emperor Programme. fM computer control technology 】. Xi'an Jiaotong University Press, 1994. 【2] AheraCorporation, FLEXIOKEEmbeddedProgrammableLogicDevices, 2001. 【3】 TexasInstrumentsIncorporated, THS120612-BIT6MSPS, SI-MULTANEOUSSAMPLINGANALOG-TO-DIGITALCONVERTERS, 2000. [4】 AheraCorporation, ConfigurationDevicesforSRAM-BasedLUTDevices, 2001. [ ,5】 AheraCorporation.LPMReferenceGuide [Z], 1996 (12). First Author: Liu Zhuofu (1976 a), male, Ph.D., Harbin Engineering University. Received Date :2002-06 an l8 (vest military braided hair) ( on the next page 34) Figure 5 Virtual Instrument Software Panel At present, China fully digital AE instrument is also very small. The system can provide 16-bit 2.5M / / IOM sampling and l2-bit 20M samples, ideal for AE detection system. We use the DECI's SEl000 a HI acoustic emission sensors,[link widoczny dla zalogowanych], the output of the module's input as to achieve a multi-channel non-destructive testing. As high-speed parallel DSP processing, data transfer and addressing capability, thus can be a 44 for a near real-time sense of complete data records and additional feature extraction. 4 Conclusion This paper presents a modular, multi-DSP parallel processing of multi VXI instrument platform VVP, the text of the VVP platform, the basic idea of the characteristics of the hardware system structure in detail elaboration. around the VVP platform, we developed a high-speed,[link widoczny dla zalogowanych], high-precision data acquisition module. with domestic and foreign similar products, compared with high precision, modular, high reliability, cost-effective, functional and easy expansion, especially for applications in high-speed instruments. This system of radar, communications, aerospace and other areas measured broad application prospects. References: l】 【Chen Guangyu. VXI bus test platform technology 【M】. Electronic Science and Technology University Press, 1996. [21VXIbussystemspecificationREVISION: 1. 4.VXIbusConsor-tium.1992. [31ADSP a 2106xSHARCUser, sManua1.AnalogDeviceCompanyfM】 .1998. First Author: Sun Yang (1978), male, graduate students, primarily engaged in the VXI instruments and DSP system development. Received 13 :2002-05-29 (military vest braided hair)
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