The Design of Data Acquisition System in Wireless Dynamic Strain Acquisition Technology

2014 ◽  
Vol 607 ◽  
pp. 673-676 ◽  
Author(s):  
Chen Ding ◽  
Ya Wen Dai ◽  
Peng Li ◽  
Yang Sun ◽  
Wei Zheng Wang ◽  
...  
Keyword(s):  
Data Acquisition ◽  
Current Source ◽  
Data Acquisition System ◽  
Acquisition System ◽  
Constant Current ◽  
Dynamic Strain ◽  
Accurate Data ◽  
Constant Current Source ◽  
Signal Amplifier ◽  
Source Signal

Dynamic strain acquisition technology is becoming increasingly important in industrial production. Compared with the static strain acquisition technology,the dynamic stain acquisition technology provided a much wider range of frequencies from 0~100KHz which required a much more accurate data acquisition system. This paper proposed an accurate data acquisition system which included electric bridge、constant current source、signal amplifier and anti-aliasing filter. This system has largely suppressed noise and increased the performance of the dynamic strain acquisition.

A Vibration Data Acquisition System Based on ICP Sensor and Cortex-M3

2013 ◽  
Vol 303-306 ◽  
pp. 1017-1020
Author(s):  
Si Quan Hu ◽  
Chun Dong She ◽  
Hui Yao
Keyword(s):  
Data Acquisition ◽  
Seismic Data ◽  
Current Source ◽  
Data Gathering ◽  
Data Acquisition System ◽  
Vibration Monitoring ◽  
Constant Current ◽  
Constant Current Source ◽  
Vibration Data ◽  
Machine Monitoring

Vibration data acquisition has comprehensive applications such as machine monitoring, seismic data gathering. This paper presented a design of a vibration monitoring system based on an ICP acceleration sensor and a Cortex-M3 microcontroller. The sensor modulation circuit is illustrated in detail including the constant current source and filtering. An evaluation on the prototype is developed and the results show that our design can successfully monitor the vibration situations of interested objects.

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..

Design and Application of the Testing System for a New Pipe Pressure Sensor

2014 ◽  
Vol 904 ◽  
pp. 395-398
Author(s):  
Xiao Ming Zhang ◽  
Yi Yuan ◽  
Jian Min Liu
Keyword(s):  
Data Acquisition ◽  
Pressure Sensor ◽  
Dynamic Pressure ◽  
Current Source ◽  
Test System ◽  
Constant Current ◽  
Measured Signal ◽  
Constant Current Source ◽  
Pass Filter ◽  
Low Pass Filter

The new pipe pressure sensor is a clamp-on ICP (Integrated Circuit Piezoelectric) type dynamic pressure sensor, mainly for the clamp-on pressure testing of high pressure fuel pipe. In testing, the vibration of the fuel injection pumps and diesel engine will disturb the clamp-on pressure signals, resulting in one of the measured signal to noise ratio is low, the second is the test system, in particular the signal transmission have a significant impact. In response to these problems, designed a PCI data acquisition card building-in constant-current source and special low pass filter, and developed the corresponding data acquisition software based on C++ Builder. The bench and real vehicle testing show: the test system can better fit with the new type pressure sensor to obtain accurate clamp-on pressure signals.

Coordinate Measurement System for Copper-Clad Plate

2015 ◽  
Vol 734 ◽  
pp. 75-78
Author(s):  
Li Juan Hou ◽  
Fu Xin Mao
Keyword(s):  
Measurement System ◽  
Current Source ◽  
Linearization Method ◽  
Constant Current ◽  
Constant Current Source ◽  
Coordinate Measurement ◽  
Fitting Method ◽  
Signal Amplifier ◽  
Curve Fitting Method ◽  
Switch Circuit

For getting the coordinate of contactor on CCL, the measurement system transformed resistance into voltage by providing constant current on CCL. The system includes MCU, 3A constant current source, MOSFET switch circuit, signal amplifier circuit and A/D converter. By the curve-fitting method, the equipotent lines of CCL were simulated with MATLAB according to the discrete data. The equations of equipotent lines were obtained with second-order polynomial fitting method. The two curves which the contactor located in were acquired with local linearization method, and the coordinate was gained by calculating solving equation groups.

Study on the Application of High Precision Strain Acquisition System Based on Twin-Constant-Current Source

2013 ◽  
Vol 437 ◽  
pp. 399-403
Author(s):  
Zong Ju Hu ◽  
Zeng Yong Long
Keyword(s):  
Current Source ◽  
Acquisition System ◽  
Constant Current ◽  
Voltage Source ◽  
Constant Current Source ◽  
Strain Collection ◽  
High Measurement ◽  
Fan Blade ◽  
Lab Test ◽  
Deformation Tests

Aiming at the shortcomings of the constant voltage source strain acquisition system, the paper put forward a new strain acquisition technology based on the double-side half-bridge measurement of the constant current source. It has demonstrated and analyzed the advantages of constant current source circuit using for strain collection, and has raised the design of multi-channel strain acquisition system. Lab test and running in a large fan blade deformation tests showed that the strain acquisition system had high measurement precision, stability, anti-interference and reliability.

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