Electricity: measuring and testing – Electrical speed measuring – Including 'event' sensing means
Patent
1975-05-12
1977-02-01
Demeo, Palmer C.
Electricity: measuring and testing
Electrical speed measuring
Including 'event' sensing means
324 295, G04F 800
Patent
active
040064158
ABSTRACT:
An integration system is disclosed including a reversible integrating device having an integrating capacity between its upper and lower limits of integration which is at least twice that which is required for a desired application. Circuitry is provided for reading the integral stored in the integrating device and producing a voltage proportional to that integral. Circuitry is also provided for sensing which of the limits of integration is closer to said integral and a switch is provided for selecting the direction which integration will proceed so that the period of integration can always be at least half that of the integrating capacity of the device. To determine the integral during the period of integration, a variable resistor is first adjusted to store a reference voltage corresponding to the integral stored in the integration device at the start of the period of integration. Thereafter this reference voltage is compared with the voltage produced by the circuit that reads the integrating device to indicate the value of the integral accumulated in the integrating device from the start of the period of integration.
REFERENCES:
patent: 3422337 (1969-01-01), Carson
patent: 3484681 (1969-12-01), Grady, Jr.
patent: 3778702 (1973-12-01), Finger
patent: 3886442 (1975-05-01), Chiku
Curtis Instruments, Inc.
DeMeo Palmer C.
Tokar Michael J.
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