Boots – shoes – and leggings
Patent
1992-12-11
1994-12-20
Black, Thomas G.
Boots, shoes, and leggings
364179, 324 74, 324121R, G06F 1531, G01R 1328
Patent
active
053750675
ABSTRACT:
A data acquisition system such as a digital oscilloscope includes a central processing unit which controls the waveform memory, analog to digital converter, trigger generator, and display to automatically adjust the acquisition parameters to optimal values for a particular repetitive waveform received by the data acquisition system. The system initially optimizes the acquisition parameters for determining the length of the input waveform and then determines the input waveform length. Parameters are then determined for best frequency analysis of the input waveform, and the waveform is then frequency analyzed to determine its spectral content. Based on this information, the acquisition parameters are adjusted such that the sampling rate is sufficient to avoid aliasing of the highest significant frequency components of the input waveform while accommodating all or substantially all of the waveform within the memory capacity of the waveform memory, and the voltage range of the analog to digital converter is set so that the range of the input signal will substantially match the input range of the converter.
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David O. Smallwood, "Characterizing Transient Vibrations Using Band Limited Moments", Proceedings of the 60th Shock and Vibration Symposium, Virginia Beach, Virginia, Nov., 1989, pp. 93-109.
Black Thomas G.
Nguyen Tan Q.
Nicolet Instrument Corporation
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