Sensor element having at least one measurement element with...

Details Sensor element having at least one measurement element with... Sensor element having at least one measurement element with...

2005-10-07

2009-11-17

Allen, Andre J (Department: 2855)

Thermal measuring and testing

Temperature measurement

Mechanical

Reexamination Certificate

active

07618188

ABSTRACT:
A sensor element (1) has at least one measurement element (2) with piezoelectric and pyroelectric properties, and measurement electrodes (3). A measurement variable and a disturbance variable act simultaneously upon the at least one measurement element (2) and the measurement signal derived from the measurement electrodes (3) includes an interference signal. The sensor element (1) has at least one compensation element (4, 4′) upon which only the disturbance variable acts, so that a correction signal used to compensate for the interference signal in the measurement signal can be derived from the compensation element (4, 4′). The invention consists in that the compensation element (4, 4′) is in thermal contact with a first support (10) and with a second support (11) of the measurement element (2), or with the measurement element (2), over its length between the supports (10, 11), so that substantially the same temperature field is established in the measurement element (2) and in the compensation element (4, 4′).

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