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Research of Rutting Test Data Acquisition System Based on Vritual Instrument
Author: DuBingZheng
Tutor: SunChaoYun
School: Chang'an University
Course: Signal and Information Processing
Keywords: Virtual instrument PXI-6070E LabVIEW Data acquisition Strain Test
CLC: U414
Type: Master's thesis
Year: 2011
Downloads: 36
Quote: 1
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Abstract
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Highway construction in China , and a variety of mixed asphalt material widely used on the road , so that people pull the compression performance of pavement materials become an important means of an inevitable , this research also improve the compressive strength of the pavement material . Rutting test is the measurement of a pavement material pull compression test method . In the when measuring pavement material stress-strain , they use traditional equipment , they self-contained and difficult combination of other devices , and virtual instrument can be a good solution to this problem . In this paper, the virtual instrument based on PXI bus , NI's PXI - 6070E multifunction data acquisition card , PXI-8186 embedded controller , SCXI signal conditioning instrument hardware platform ; NI LabVIEW software development platform designed and The rutting test collection system . Firstly, studied the virtual instrument development at home and abroad , and characteristics . Analysis of the difference between virtual instruments and traditional instruments , the LabVIEW software developers build the rutting test collection system applications platform , in-depth research . Secondly , according to the needs of the system development of key technologies , including the testing technology , sensor technology , and focus on the hardware and software aspects of the design of the collection system . Hardware platform structures including the three parts of the sensor bridge circuit design , signal conditioning modules , acquisition module , take full-bridge type III bridge circuit design phase bridge circuit design for a single-arm bridge and half-bridge bridge circuit design , full-bridge type Ⅲ bridge circuit design of its high sensitivity , and the role of compensation in measuring pavement material tensile and compressive strain material bending strain effects can be offset by the temperature ; software is modular in design , data collection, storage and playback , and print a report function fine , by calling different modules to complete the testing needs of the operation . Finally, the system is a data acquisition system of the company with the Datataker contrast , comparing the data obtained in the different bridge circuit design . The results showed that the application of this system can be very good to complete the data acquisition task flexible pavement materials , and the system has a certain nature and use , so engineers and technicians can better analyze structural performance of the pavement material .
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CLC: > Transportation > Road transport > Road works > Road construction materials
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