Title :
A 256 channel digital filter for a data acquisition system
Author :
Roberts, W. ; Aikens, B.
Author_Institution :
TRIUMF, Vancouver, BC, Canada
Abstract :
The TRIUMF (Tri-University Meson Facility) Central Control System (CCS) employs several data acquisition systems to monitor its operational parameters. Space constraints on the multiplexer cards prohibit the installation of adequate anti-alias filters which allows 60-Hz and other noise to corrupt the measurements. The new system overcomes this problem by sampling each channel at a 160 samples/second rate and using a DSP microcomputer to lowpass filter the data. The multiplexer and analog-digital converter operate at 256 times the channel sample rate. The channel filter bandwidth is restricted to approximately 1 Hz due to the rate at which the CCS reads the data. One DSP microcomputer is able to filter the 256 channels in a multiplexed system at a cost less than that of the anti-alias filters which would otherwise have been required.<>
Keywords :
data acquisition; digital filters; particle beam diagnostics; physics computing; proton accelerators; storage rings; synchrotrons; DSP microcomputer; TRIUMF; analog-digital converter; anti-alias filters; channel filter bandwidth; data acquisition systems; multiplexer cards; operational parameters; Carbon capture and storage; Centralized control; Condition monitoring; Control systems; Data acquisition; Digital filters; Digital signal processing; Mesons; Microcomputers; Multiplexing;
Conference_Titel :
Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0135-8
DOI :
10.1109/PAC.1991.164667
