Micro-Ohm Resistance Measure System Based on LabVIEW

2013 ◽  
Vol 347-350 ◽  
pp. 111-116
Author(s):  
Tian Tian ◽  
Xu Min Zhao ◽  
Li Na Zeng ◽  
Yu Tao
Keyword(s):  
Virtual Instrument ◽  
Reference Signal ◽  
Current Source ◽  
Control Program ◽  
Critical Issue ◽  
Low Noise ◽  
Measuring System ◽  
Constant Current ◽  
Constant Current Source ◽  
Detection Technology

According to the critical issue of accurate measurement of small resistance in the field of electronic measurement, the micro-ohm resistance measurement system is designed based on LabVIEW. It consists of two parts: hardware and software. The hardware is composed of AC constant current source, reference signal source, low noise amplifier, data acquisition card, computer etc.; The software consists of man-machine interface program, measure and control program and data processing program. The system based on virtual instrument cross-correlation detection technology achieves the effective measurement of micro-ohm resistance. It is an automatic measuring system with a flexible and convenient programming, simple and accurate measurement, high resolution and stable performance.

Weak Signal Detection and Application in Electronic Experiment Based on Virtual Instrument

2014 ◽  
Vol 511-512 ◽  
pp. 294-300
Author(s):  
Tian Tian ◽  
Zhen Yu Li ◽  
Tian Gao ◽  
Fang Yao Liu ◽  
Jian Wu
Keyword(s):  
Virtual Instrument ◽  
Current Source ◽  
Teaching Experiment ◽  
Open Loop ◽  
Low Noise ◽  
Constant Current ◽  
Weak Current ◽  
Experimental Conditions ◽  
Printing Plate ◽  
Constant Current Source

Base on the virtual instrument technology, a micro signal measurement system was established and applied to the electronic teaching experiment. It is composed of PC, oscilloscope, signal generator, ac constant current source, low noise preamplifier and tested operational amplifier, etc. it can complete the measurement of uV weak voltage, uA weak current measure, wires and printing plate conductor resistance and inductance, amplifier open-loop amplitude frequency and phase frequency characteristics, and so on many aspects of modern electronic measurement experiment content. The system not only has the characteristics of functional diversity, measurement accuracy, and good graphic interface, simple operation and overcomes the shortcomings in the course of electronic technology experiment teaching, and play an important role on improving the experimental conditions,reducing the cost of experiments, raising the level of classroom teaching and practice of teaching.

scholarly journals Low noise constant current source for bias dependent noise measurements

2011 ◽  
Vol 82 (1) ◽  
pp. 013906 ◽  
Author(s):  
D. Talukdar ◽  
R. K. Chakraborty ◽  
Suvendu Bose ◽  
K. K. Bardhan
Keyword(s):  
Current Source ◽  
Low Noise ◽  
Constant Current ◽  
Constant Current Source ◽  
Noise Measurements

Development of a Multi-Function Virtual Instrument Based on a Constant Current Source

2013 ◽  
Vol 385-386 ◽  
pp. 492-495
Author(s):  
Dong Bing Dai ◽  
Ya Jun Wang ◽  
Ye Ping Sun ◽  
Zheng Guang Liu
Keyword(s):  
Data Acquisition ◽  
High Precision ◽  
High Power ◽  
Virtual Instrument ◽  
Current Source ◽  
High Accuracy ◽  
Constant Current ◽  
Constant Current Source ◽  
Data Acquisition Card ◽  
Further Development

Virtual instrument is a result of the computer combined with some instrument hardware, working for the instrumentation applications, it is one trend of the instrumentation development .This paper presents a design of a high-power and high-precision constant current source, studied three different electrical testing technologies based on constant current source and propose the principle of integrated the three electrical test technologies on a virtual instrument platform. A multi-function virtual instrument system based on LabView language, USB data acquisition card and a constant current source has been developed. This system has a high accuracy, high integration and a thecapability of further development etc..

Temperature Measurement and Control of Fiber Drawing Furnace Based on Virtual Instrument

2012 ◽  
Vol 529 ◽  
pp. 507-511
Author(s):  
Lei Chen ◽  
Zhong Dong Wang
Keyword(s):  
Temperature Measurement ◽  
Virtual Instrument ◽  
Current Source ◽  
Constant Current ◽  
Instrumentation Amplifier ◽  
Fiber Drawing ◽  
Constant Current Source ◽  
And Control ◽  
Measurement And Control ◽  
Conditioning Circuit

The temperature in fiber drawing is one of the key factors influencing fiber’s performance. To the temperature measurement and control problem, the four-wire lead configuration of Pt100 with current excitation was adopted, the signal conditioning circuit includes constant current source, instrumentation amplifier and anti-aliasing filter. The computer collected signals from the conditioning circuit and output control signals by data acquisition card PCI-6221M. The software program was based on LabVIEW, the function relationship between resistance and temperature based on international thermometric scale and the digital filter were applied to calculate temperature. The improved PID control algorithm and the PWM technique were used to realize the temperature control. The experiment results show that the deviation is 0.71°C when the average temperature of the furnace center is 170.25 °C, which satisfies the design requirements.

Design method for high power and low noise intelligent adjustable constant current source

2018 ◽  
Vol 33 (9) ◽  
pp. 778-786
Author(s):  
季志博 JI Zhi-bo ◽  
王辉 WANG hui ◽  
王磊 WANG lei ◽  
董兴法 DONG Xin-fa ◽  
王军 WANG Jun
Keyword(s):  
High Power ◽  
Design Method ◽  
Current Source ◽  
Low Noise ◽  
Constant Current ◽  
Constant Current Source

Design and Study on Power Supply for Giant Magnetostrictive Accurate-Motion Actuator

2008 ◽  
Vol 392-394 ◽  
pp. 787-792
Author(s):  
M. Wu ◽  
Xi Lin Zhu
Keyword(s):  
High Speed ◽  
High Performance ◽  
Design Method ◽  
Current Source ◽  
Fast Response ◽  
Low Noise ◽  
Constant Current ◽  
Loop Current ◽  
Constant Current Source ◽  
Wide Range

The architecture and operation theory of Giant Magnetostrictive Accurate-motion Actuator have been introduced. After analysing the driving characteristic of giant magnetostrictive material and requirement of driving power, a design method of wide range and high precision NC constant-current source has been put out. The output circuit is composed of serial 12-bit DACs Max531, low-noise high-speed precision operational amplifiers OP27 and driving circuit. It provides current from 0 to 2.048A with 0.5mA step value. Two fully differential input channels 16-bit, sigma-delta ADCs AD7705 collects output current in feedback loop. Current ripple is controlled under 0.25mA through using homemade high-performance linear power. The result shows that the driving power with characteristic of high stability and fast response meets the needs of driving of Giant Magnetostrictive Accurate-motion.

System Design of AC Open-Loop Gain Measurement of Amplifier

2013 ◽  
Vol 333-335 ◽  
pp. 230-235
Author(s):  
Tian Tian ◽  
An Na ◽  
Xu Min Zhao ◽  
Li Na Zeng ◽  
Yu Tao
Keyword(s):  
System Design ◽  
Virtual Instrument ◽  
Automatic Measurement ◽  
Critical Issue ◽  
Open Loop ◽  
Low Noise ◽  
Loop Gain ◽  
Electronic Measuring ◽  
Detection Technology ◽  
Data Acquisition Card

Concerning the critical issue that how to measure the gain of AC open-loop of operational amplifier accurately, in the field of electronic measuring. The measure system design of the AC open-loop gain of amplifier is designed in the paper based on labVIEW. The system consists of two parts of hardware and software. The hardware is composed by the multifunctional signal source, the low noise preamplifier, the awaiting measured amplifier, the data acquisition card and the computer; the software is composed by the human-computer interface program, measurement program and data post-processing. Using the virtual instrument cross-correlation detection technology, it can measure the gain of amplifier AC open-loop accurately, with the function of acquisition, measurement, real-time display and playback, constituting a programming flexibility, concise and efficient, accurate measurement, higher resolution, steady performance personalized automatic measurement system.

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