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 Posted: Sun 17:28, 05 Dec 2010 Post subject: ugg stivali Multi-channel communication technology |
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Multi-channel communication technology based on high-speed data acquisition device
Between the interference. Multi-channel data acquisition is followed by multi-switch to switch analog signals for each channel and A / D converter in turn connected to an analog signal acquisition. In the initial switch, any switch (mechanical or electronic), due to mechanical or electrical performance limitations, there could be more than three-channel jitter target acquisition data acquisition interface phenomenon,[link widoczny dla zalogowanych], after ~ segment of time to stabilize. Therefore, the multi-channel analog signal switch in the switch, the same existence of such problems. The No. 1 Yancheng Hua et al: Multi-channel high-speed data communication technology acquisition device. 37 mentioned earlier, the main multi-channel data acquisition software method to solve the delay j. In the data acquisition system, using a large number of electronic devices. Most of these devices more sensitive to temperature, and its operating characteristics with temperature change, reflected in the output is the zero level drift with temperature changes slowly. The zero level drift will certainly added to the sample data,[link widoczny dla zalogowanych], resulting in the increase of sampling error L4J. Therefore, the work of multi-channel data acquisition must be considered zero-level drift. In this acquisition system prepared by zero handler, the data will be collected and zero-level subtraction, the resulting zero-level drift is affected by the small data, so that the data collected by the virtual elimination of contains zero level drift component. 4 Conclusion The multi-channel communications based on technology developed data acquisition,[link widoczny dla zalogowanych], well testing completed test work flow, but also to test the efficiency is greatly improved. From the stern flow field applied to test the water drop test results, the system speed, every millisecond can be collected up to 40,000 data; stable, continuous 256 samples; fully functional and high degree of automation. The system is ideal for high precision flow test to ensure test accuracy. But to get more precision can only be achieved by lowering the sampling frequency, but this will make the data collected in each channel at the same time was somewhat reduced, use of high-resolution A / D chip to improve the multi-channel data acquisition study is still ongoing. References 【1] Liu Leshan, Ye Jizhong. Ye Yongjian. Micro-Computer Interface Technology Principles and Applications 【M], Wuhan: Huazhong University Press, 1996. [2] He Limin. SCM application system design - system configuration and interface technology [M]. Beijing: Beijing Aerospace University Press, 19, Shuai [3] Chen Guangdong, Zhao of the first. Microcomputer principle and interface technology [M]. Wuhan: Huazhong University Press,[link widoczny dla zalogowanych], 1993. [4] Ma Ming, Zhou Great Wall. Data acquisition and processing technology [M]. Xi'an: Xi'an Jiaotong University Press, 1998. Studyandmanufactureofhlgh-speeddatasam # nginstrtmaentOnbasisofmultichannelscommunicationtechnologyYANChug-huaI, CHENGEr-sh ~ g2 (1.Dept.ofBasicC ~ rses + NavalUniv.ofEngineering, Wuhan43 (D33.China; 2.HuashongUniv.ofSci. & Tech., Wuhan430074,[link widoczny dla zalogowanych], China) Abstract: Byintroducingaboutfunctionandcharacteristicofhigh-speeddatasamplinginstaument , whichisdevelopedbyappfieafionofmultlehmmelco ~ ununieationtechnology, severalkeytechnologiesarediscussedindetailinthisthesis.Itissho ~ athattherearehighspeed, 0dstabifity, completefunctionandhJIghautomationirIthisirI-stmment .. Il1ehighprecisionoftheinstrumentisfittotestfluidfield.Theveracityc Ⅲ 1beinsured.KeyWOldS: multi-channels; datasampling; testing
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