Sensor, method and computer program for determining the density or composition of a fluid
AssigneeWoePal GmbH
InventorsStefan Palzer, Gabriel Rodriguez Gutierrez, Alvaro Ortiz Perez
Life of this patent
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Abstract
A sensor having a MEMS microphone (1) and a processor (2). The MEMS microphone (1) having a noise spectrum depending on a fluid to be analyzed. The processor (2) is configured to receive a measurement signal from the MEMS microphone; to identify a characteristic of the noise spectrum of the MEMS microphone in the measurement signal; and to determine a property of the fluid based on the characteristic identified.
Claims20
A sensor for determining a property of a fluid, the sensor comprising:
- a MEMS microphone having a noise spectrum, intrinsic to the MEMS microphone depending on a fluid to be analyzed, wherein the noise spectrum has a noise resonance due to the geometric design of the MEMS microphone, wherein the noise resonance depends on the sound velocity of the fluid;
- and
- processor configured to
- receive a measurement signal recorded by the MEMS microphone and containing the noise resonance;
- identify in the measurement signal a characteristic of the noise resonance;
- and
- determine the property of the fluid based on the characteristic identified.
A non-transitory computer program configured to perform the following steps when executed on a processor:
- receive a measurement signal recorded by a MEMS microphone containing a noise spectrum intrinsic to the MEMS microphone, wherein the noise spectrum has a noise resonance due to the geometric design of the MEMS microphone, wherein the noise resonance depends on the sound velocity of the fluid;
- identify in the measurement signal a characteristic of the noise resonance of;
- and
- determine a property of the fluid based on the characteristic identified.
A method for measuring characteristics of a fluid, the method comprising:
- recording a measurement signal in a MEMS microphone arranged in the fluid, wherein the recorded measurement signal contains a noise resonance intrinsic to the MEMS microphone, wherein the noise spectrum has a noise resonance due to the geometric design of the MEMS microphone, wherein the noise resonance depends on the sound velocity of the fluid;
- identifying with a process a characteristic of the noise resonance of the noise spectrum of the MEMS microphone in the measurement signal;
- and
- determining with the processor a property of the fluid based on the characteristic identified.
Dependencies are inferred from the claim text.