Measuring and testing – Speed – velocity – or acceleration – Acceleration determination utilizing inertial element
Patent
1988-06-27
1990-06-12
Williams, Hezron E.
Measuring and testing
Speed, velocity, or acceleration
Acceleration determination utilizing inertial element
200 6153, G01P 1508
Patent
active
049322605
ABSTRACT:
A crash sensor for automobiles of the type including a sensing mass movable in a closed chamber against pressure resulting from viscous flow has a disk shaped sensing mass suspended by one or two webs like those used to suspend the moving elements of audio speakers. The web suspending the sensing mass allows the sensing mass free axial motion while resisting radial motion. Movement of the sensing mass is resisted by air pressure resulting from viscous flow of air through conduits. Compensation for variation of air viscosity with temperature is achieved by varying the travel of the sensing mass. The sensor design enables accurate automatic calibration. The unit is compact and is made from a small number of inexpensive parts. The combination of these elements provides a crash sensor that is insensitive to cross axis vibrations and costs much less than current production sensors.
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patent: 2950908 (1960-08-01), Rainsberger et al.
patent: 2960871 (1960-11-01), Ganther et al.
patent: 2974529 (1961-03-01), Brueggeman et al.
patent: 3380308 (1968-04-01), Burch et al.
patent: 3524031 (1970-08-01), Mack
patent: 4023413 (1977-05-01), Stauber
Bell Robert P.
Williams Hezron E.
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