Novel and low-cost temperature compensation technique for piezoresistive pressure sensors
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hdl:2117/12816
Document typeConference lecture
Defense date2009
Rights accessOpen Access
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Attribution-NonCommercial-NoDerivs 3.0 Spain
Abstract
This paper proposes a low-cost technique to
compensate for the temperature dependence of
piezoresistive pressure sensors configured in a Wheatstone
bridge. The sensor is treated as a resistive circuit and three
equivalent resistances are measured by setting appropriately
the bridge terminals. One of these equivalent resistances
depends on temperature but not on pressure and, hence, it
can be used to compensate for the temperature dependence
of the output parameter. In such a way, neither data of a
previous temperature calibration nor additional components
are required to compensate for the temperature dependence.
The proposed technique is applied to a commercial pressure
sensor, which is measured by means of a direct sensor-tomicrocontroller
interface circuit. Experimental results show
that temperature effects on the pressure measurement
decrease more than ten times when the proposed technique
is applied.
CitationReverter, F. [et al.]. Novel and low-cost temperature compensation technique for piezoresistive pressure sensors. A: IMEKO World Congress. "XIX IMEKO World Congress. Fundamental and Applied Metrology". Lisboa: 2009, p. 2084-2087.
ISBN978-963-88410-0-1
Publisher versionhttp://www.imeko.org/index.htm?/proceedings.php