Boots – shoes – and leggings
Patent
1985-04-12
1988-04-05
Lall, Parshotam S.
Boots, shoes, and leggings
340731, 324111, 324 77R, G06F 1520, G09G 106, G01R 100
Patent
active
047363274
ABSTRACT:
A digital instrument is represented by an analog-to-digital converter 17 controlled by a CPU 10 to effect measurements at regular intervals. The digital measurements are stored in a history file in a RAM 14, e.g. the most recent 100 or 500 measurements. The measurements are also linearly processed by rounding and range scaling to produce 100 reduced measurements in a second file in the RAM 14. This file is cyclically read out to a digital-to-analog converter 18 to produce a voltage on a terminal 22 for application to an oscilloscope which provides a display from which features of the measurements (e.g. a trend or a periodic component) can be seen. In order to allow for flyback and reset the 100 reduced measurements are held in a file of larger capacity (e.g. 130 or 150 measurements) which is cyclically read out. As the oldest of the 100 measurements is read a driver 19 provides a trigger pulse on a terminal 23 for the oscilloscope external trigger input. Various linear and non-linear algorithms for deriving the second file from the history file are described.
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Dixon Joseph L.
Gaudier Dale
Lall Parshotam S.
Schlumberger Electronics (U.K.) Limited
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