Electrical pulse counters – pulse dividers – or shift registers: c – Systems – Identifying or correcting improper counter operation
Patent
1991-04-03
1993-01-19
Heyman, John S.
Electrical pulse counters, pulse dividers, or shift registers: c
Systems
Identifying or correcting improper counter operation
377 55, 307362, 307517, 328115, H04B 110, H03K 2102
Patent
active
051812320
ABSTRACT:
The revolutions of a diesel engine are counted by providing vibration detector converting the vibration propagating through the fuel injection pipe into an electric signal; an amplitude sorter for receiving the electric output signal of the detector and providing an output signal when the amplitude becomes larger than a predetermined level; a waveform shaper for receiving the output signal of the sorter and converting respective pulse groups to single pulse outputs. The respective pulses from the sharper are judged to determine whether signal pulse in the present period is within a predetermined allowable range or not, and thereby determining whether respective pulses are "normal" pulses or not. The number of normal pulses per unit time are counted and displayed on a monitor.
REFERENCES:
patent: 3280937 (1966-10-01), Faber et al.
patent: 3944934 (1976-03-01), Francis
patent: 4519091 (1985-05-01), Chu et al.
patent: 4694256 (1987-09-01), Kawamura
Heyman John S.
Oppama Kogyo Kabushiki Kaisha
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