Boots – shoes – and leggings
Patent
1981-01-09
1983-10-04
Smith, Jerry
Boots, shoes, and leggings
324162, 361236, G06F 1520, G01P 342
Patent
active
044082908
ABSTRACT:
An acceleration sensor acts on the variable-frequency pulses of a speed sensor signal to recognize any variation of the pulse period thereof and to produce an output indicative of the magnitude of the detected variation to within a fixed degree of accuracy. The periods of groups of known, variable number pulse groups are measured with reference to a fixed-frequency clock pulse signal and the measurement periods of successive groups of equal numbers of pulses are compared. If the difference between pulse group periods is zero or less than a predetermined value, the number of pulses in each group is increased in order to increase the total number of clock pulses during the measurement interval. The number of pulses per group is increased until the difference between measured periods exceeds the predetermined value or until the number of pulses per group reaches a predetermined maximum. Acceleration rate calculations and memory control procedures are designed to take into account the variation of the number of pulses per group.
REFERENCES:
patent: 3780346 (1973-12-01), Gagnon
patent: 3943345 (1976-03-01), Ando et al.
patent: 4267575 (1981-05-01), Bounds
patent: 4315213 (1982-02-01), Wolff
patent: 4336497 (1982-06-01), Woodhouse et al.
Honda Minoru
Kubo Jun
Nissan Motor Company Limited
Smith Jerry
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