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Multi-parametric sensor with bridge structure
Multi-parametric sensor with bridge structure
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机译:具有桥梁结构的多参数传感器
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摘要
The disclosure relates to a sensor for detecting and/or analysing a gas. The sensor comprises a substrate, a recess or opening arranged in the substrate, a first bridge structure and a second bridge structure. The first bridge structure and the second bridge structure extend over said recess or opening and are anchored in the substrate. The first bridge structure forms a first hotplate and comprises a first patch of sensing material, in particular of a metal oxide material, arranged on the first hotplate, electrodes adapted to measure an electrical property of the first patch and a heater adapted to heat the first hotplate. The second bridge structure comprises a temperature sensor. The sensor comprises circuitry for driving the heater and for processing signals from the electrodes and the temperature sensor. The sensor provides a first operation mode configured to perform a measurement of an electrical property of the first patch and a second operation mode configured to operate the second bridge structure in a sensing mode to perform a measurement of a thermal property of the gas. The thermal property is a thermal capacity and/or a thermal conductivity and/or a thermal diffusivity of the gas.
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