Measuring and testing – Speed – velocity – or acceleration – Temperature compensator
Patent
1987-10-22
1988-08-30
Chapman, John
Measuring and testing
Speed, velocity, or acceleration
Temperature compensator
73517AV, G01P 1510
Patent
active
047667680
ABSTRACT:
An accelerometer comprising a support (52) and a proof mass (40) mounted to the support by a flexure (50) or the like, such that the proof mass can rotate about a hinge axis (HA) perpendicular to sensitive axis (SA). An isolator (42) is also mounted to the support by an isolator suspension system (60, 62) that is relatively compliant for isolator movement parallel to a transducer axis (TA) normal to the hinge axis, and relatively noncompliant for isolator rotation about the hinge axis. Force transducers (80, 82) are connected between the isolator and the proof mass. The force transducers are parallel to the transducer axis, and positioned on opposite sides of the hinge axis from one another, such that rotation of the proof mass about the hinge axis puts one force transducer in tension and the other force transducer in compression. The isolator suspension system reduces the magnitude of common mode inputs, such as those caused by differential thermal expansion of the crystals with respect to other accelerometer components.
REFERENCES:
patent: 4221131 (1980-09-01), Albert
patent: 4517841 (1985-05-01), Peters et al.
patent: 4658174 (1987-04-01), Albert
patent: 4718275 (1988-01-01), Norling
Cornelius Craig J.
Norling Brian L.
Chapman John
Sundstrand Data Control Inc.
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