Measuring and testing – Speed – velocity – or acceleration – Acceleration determination utilizing inertial element
Patent
1988-08-30
1989-12-19
Chapman, John
Measuring and testing
Speed, velocity, or acceleration
Acceleration determination utilizing inertial element
G01P 1513
Patent
active
048874671
ABSTRACT:
A temperature-compensating circuit for a capacitive or prezoelectric resistive accelerometer comprising a flexure with torquer coils subjected to physical changes in response to the linear accelerations, capacitive or piezoelectric resistive elements for detecting strain of the flexure, elements for amplifying the detected output and a negative feedback amplifier for supplying the output to the torquer coils. The output of the piezoelectric resistive element and the resistance of the torquer coils are affected considerably by the temperature change whereby the gain of the feedback amplifier changes. Accordingly, in the circuit of the present invention, the temperature change in the total gain of the accelerometer is removed by adding resistance elements to the negative feedback amplifier so as to cancel the positive temperature coefficient of resistance of the torquer coil and other elements.
REFERENCES:
patent: 3882731 (1975-05-01), Koning
patent: 4083237 (1978-04-01), Levesque
patent: 4128010 (1978-12-01), Aske
patent: 4144764 (1979-03-01), Hartzell, Jr.
patent: 4598586 (1986-07-01), Danielson
patent: 4658647 (1987-04-01), Shintani et al.
Fukumoto Yasuhiko
Sakuma Kazuhiro
Tomioka Akihiro
Bell Robert P.
Chapman John
Japan Aviation Electronics Industry Ltd.
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