Micromechanical pressure sensor element and method for using...

Details Micromechanical pressure sensor element and method for using... Micromechanical pressure sensor element and method for using...

2007-12-11

2007-12-11

Allen, Andre J. (Department: 2855)

Measuring and testing

Tire, tread or roadway

Tire inflation testing installation

C340S442000

Reexamination Certificate

active

11472106

ABSTRACT:
A micromechanical pressure sensor element, in particular for tire pressure measurement. The device has at least: a layer system having a diaphragm underneath which a cavity is formed, which is separated from an external space outside the pressure sensor element; a measuring device for measuring a deflection of the diaphragm; and a seismic mass formed on, underneath, or in the diaphragm. Furthermore, in a method for using such a pressure sensor element, the pressure sensor element is operatable in a sleep mode having lower power consumption and in an operating mode having higher power consumption; in the sleep mode a change in the measuring signals of the measuring device over time is checked, and if a relevant change in the measuring signals is detected, a position change is inferred and a switchover to the operating mode is performed, in which the measuring signals of the measuring device or the analysis signals formed from the measuring signals are transmitted via a transmitter, for example, an antenna.

REFERENCES:
patent: 6894600 (2005-05-01), Phelan
patent: 6945103 (2005-09-01), Lee et al.
patent: 7034672 (2006-04-01), Dinello et al.
patent: 7212104 (2007-05-01), Haswell et al.
patent: 2003/0221481 (2003-12-01), Von Wendorff
patent: 2007/0125161 (2007-06-01), Bryzek et al.
patent: 100 32 579 (2002-01-01), None

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