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USB-GPIB controller and the development of VISA library in Visual C + + Application

3 - Total Volume 491 43 2006 11 Electrical Measurement & Instrumentation ElectriealMeasurement & InstrumentationVo1.43No. 491N0v. 2oo6 Figure 4 the calibration curve used in experiments generating circuit ‰ V. 0), calculated by a simple circuit can be introduced by a Rl \ / R3 (v ~ i) regulation m = 2 and R. = Ft 2 = feet 3, VR =- IV available - + (9) (10) shows that equation (10), consistent with the sensor response curve, ie Vo = Sx (S = lOv). Nonlinear closed-loop calibration system and high-performance integrated circuits used ACU, which greatly improves the system accuracy, the system weighed by the Zhejiang Institute of Technology, the standard for fixed punctuation test, the results shown in Figure 5, the root mean square error 0.068,[link widoczny dla zalogowanych], to achieve a quantitative measurement of net content of packaged goods inspection rules (JJF1070-2ooo) accuracy. 4 Conclusion Because of the pressure of the pressure sensor generates a nonlinear potential curve itself,[link widoczny dla zalogowanych], so do not impose linearity correction circuit for high accuracy pressure measurement is very difficult, and here the non-linear calibration curve generated with ACU, which gives a non-linear way by the hardware system given in Figure 5 punctuation correction calibration and measured values scatter plot of the new method, and achieved better results. From the theoretical analysis, can be reduced to form the general formula (11) non-linear function of polynomials): f (x) = ao + a ~ x + a2x + ... + q + ... + tZXZI (11) formula ( 11) in any of the ACU can be achieved by a number, an ACU unit of output can be obtained by linear superposition on the type of nonlinear function. References 【1】 Guoxiong, Shen Health training. 【M】 instrument measuring circuit. Beijing. Machinery Industry Press,[link widoczny dla zalogowanych], 1991. 【2】 AD company. ACU manual 【EB / OL]. [link widoczny dla zalogowanych] analog. eom ,1999-12 / 2002-10-04. 【3】 Huang of Chongqing, Liu Jing. A practical guide the design of the attenuation coefficient measurement system m. Modern electronic technology, 2005, (12): ll4 a ll6. 【4】 Lu Jin, Mao Qian Min, Liu Huijun and so on. Mobile on-site net content of prepackaged goods Verification System m. Measurement, 2006,27 (4) :1-4. 【5】 Minister Yan, Cai Hongying,[link widoczny dla zalogowanych], Lv Xiuzhen. Structural parameters of the load cell elastic elements of the nonlinear error of m. Mechanical Engineer, 2005, (9) :94-95. 【Q SENSORS, ACTUATORS. Sensor error compensation】【J. Sensors and Actuators, 2004, (19O a 92. Author: Liu Huijun (1979), male, MA, College of Metrological Technology and Engineering lecturer in intelligent testing technology. Received :2006 --09- 16 (Qiu source compiled and distributed) (Continued from page 53) References 【1】 WANG Xue-wei. HE488PCGPIB Bus Controller Operation Guide 【Z】 .1996. 【2】 Zhou Yu, Gu Yaping, Chen} Yu. PCI - GPIB Controller Design and Implementation of measurement and control technology m., 2006,[link widoczny dla zalogowanych], (1): 4o a 42. 【3】 Ma Yongfeng, business Qinghua, Lidong Bin, Ma Huaijian. GPIB and parallel ports with the RS232/485 converter design】【J. Harbin University of Technology, 2000, (6) :93-95. 【4】 WANG Xue-wei, a single yung. IEEE488 personal computer design and operating statements in QuickBA ・ SIC language of m. Harbin University of Technology, 1997, (3 ): 5558. 『51 WANG Xue-wei, Zhao Naiwu. IEEE488 GPIB card design and operating statements in C language application m. Electrical Measurement and Instrumentation, 1996, (11): 2326. 【6】 Zhang Xiaoqin, Jian-Hui Lin. L ~ VIEW environment The GPIB bus is a virtual instrument development m. China Measurement Technology, 2004, (1) :53-58. 【7】 Yang Jingjing, Gu Yaping, Chen} Yu. VISA event mechanism design and implementation m. China Measurement Technology, 2006, ( 2): ll4 a ll6. Author: WANG Xue-wei (1958 a), male, Professor, research direction for the automated testing technology, modern signal processing. electrical measurement techniques. Zhang Weiwei (1979), male, MA graduate students, research interests include automated testing technology, computer application technology. Received :2006 --09-15 (SURVEYING compiled and distributed) a 49-2 \ J a
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