A Compact Portable Data Acquisition Module for Sports Biomechanics Research

1990 ◽  
Vol 6 (4) ◽  
pp. 404-414 ◽  
Author(s):  
Jeff Newmiller ◽  
Maury L. Hull
Keyword(s):  
Data Acquisition ◽  
General Purpose ◽  
Battery Pack ◽  
Digital Data ◽  
Signal Conditioning ◽  
Maximum Throughput ◽  
Analog To Digital ◽  
Portable Power ◽  
Temporary Storage ◽  
Data Acquisition Module

This article describes a new portable digital data acquisition module, which has been developed for the measurement and temporary storage of signals from mobile biomechanical phenomena in the field. The module’s performance capabilities include 32 available analog input channels, a 12-bit analog-to-digital converter, maximum throughput of 57,040 samples per second, and a temporary storage capacity of up to 253,000 samples. The portable power source is a rechargeable battery pack, and the appropriate sensors and sensor signal conditioning circuits are supplied by the user to meet the particular needs of the phenomena under study. The size of the signal conditioning, battery pack, and data acquisition module is such that it can be carried in a belt pack worn by a subject under study and weighs less than 3 kgf. To facilitate the use of the module, operating software complements the hardware. The software is comprehensive functionally in that routines are provided for acquiring data, for transferring acquired data serially to a general purpose microcomputer for storage on magnetic media, and for monitoring equipment setup. Further, the software is versatile in that the various parameters necessary to customize the operation to a particular application may be readily set. Finally, the menu-driven structure ensures that the software is easy to use.

Application of a Laboratory Analog-Digital Computer System to Data Acquisition and Reduction for Quantitative Analyses

1973 ◽  
Vol 56 (1) ◽  
pp. 135-139
Author(s):  
Matt K John ◽  
Cornelis J Van Laerhoven
Keyword(s):  
Data Acquisition ◽  
Interpolation Method ◽  
Laboratory Data ◽  
Linear Interpolation ◽  
General Purpose ◽  
Paper Tape ◽  
Digital Data ◽  
Large Computer ◽  
Analog To Digital ◽  
Tape Input

Abstract A flexible, general purpose program for a laboratory data acquisition and reduction system employing a minicomputer for off-line processing of digitized data readings from electroanalytical instrumentation was developed. Instrument data from the on-line operation of a hard-wired analog-to-digital data acquisition subsystem in conjunction with an atomic absorption instrument, a colorimeter, or a pH/millivolt meter for speeific-ion electrode determinations, are transformed into concentration units by using a linear interpolation method. The relationship between instrument measurements and quantitative data is approximated by several straight-line segments between the graphical coordinates associated with each of the reference standards analyzed. The coordinates are determined by calibrating readings and known concentrations. Routines are included to edit incorrect raw readings and to make corrections to compensate for unavoidable deviations from standard analytical procedure. The FOCAL-8 language program, therefore, permits unattended processing of sequentially read paper tape input. The results punched on paper tape are easily transferred to a large computer for more sophisticated data analysis and storage.

The Design of a Multi-Channel Data Acquisition Module Based on FPGA

2012 ◽  
Vol 433-440 ◽  
pp. 6589-6593
Author(s):  
Xiang Jiao Meng ◽  
Hui Xin Zhang ◽  
Xiang Hong Li
Keyword(s):  
Data Acquisition ◽  
Input Signal ◽  
Implementation Process ◽  
Signal Acquisition ◽  
Signal Conditioning ◽  
Logic Device ◽  
The Core ◽  
Data Compilation ◽  
Design Software ◽  
Data Acquisition Module

This paper reports the basic principle and implementation process of FPGA-based multi-channel analog signal acquisition module. The emphasis of the full text is the principle of Data acquisition and the system implementation process. Multi-channel data acquisition module is composed of signal conditioning circuit、multi-channel analog multiplexers、A/D conversion and the central control system. The design uses LM324 for input signal conditioning; uses AD's 16 analog input signal chip ADG706 for channel selection; uses AD's 12-bit precision A/D converter AD7492 as the core chip of acquisition module for completing the A/D conversion; uses Xilinx's programmable logic device XC2S100 as part of the core control to achieve control of each module. Under the control of the design software, this design can take advantage of FPGA control multi-channel analog switch、A/D conversion、data compilation and uploading the data to PC to store and analyze.

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