System and method for reducing noise in a sensor system
First Claim
1. A sensor system comprising:
- an acquisition unit comprising an analog to digital converter generating a series of digital sensor signals;
a first evaluation unit receiving the series of digital sensor signals for evaluation, wherein the first evaluation unit generates output signals that correspond to a sensor event;
a second evaluation unit independent from said first evaluation unit receiving the series of digital sensor signals;
wherein at least a first and second series of digital sensor signals is processed by the second evaluation unit to generate a control signal that is configured to select a sampling frequency controlling the analog-to-digital converter,wherein the first and second series of digital sensor signals are sampled at different sampling frequencies while converting an analog signal by the analog to digital converter,wherein the second evaluation unit further provides for a power estimation of a signal processed by the second evaluation unit.
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Accused Products
Abstract
A sensor system has an acquisition unit comprising an analog to digital converter generating a series of digital sensor signals, a first evaluation unit receiving the series of digital sensor signals for evaluation, wherein the first evaluation unit generates output signals that correspond to a sensor event, and a second evaluation unit independent from said first evaluation unit receiving the series of digital sensor signals. At least a first and second series of digital sensor signals is processed by the second evaluation unit to generate a control signal that is configured to select a sampling frequency controlling the analog-to-digital converter, wherein the first and second series of digital sensor signals are sampled at different sampling frequencies.
14 Citations
35 Claims
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1. A sensor system comprising:
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an acquisition unit comprising an analog to digital converter generating a series of digital sensor signals; a first evaluation unit receiving the series of digital sensor signals for evaluation, wherein the first evaluation unit generates output signals that correspond to a sensor event; a second evaluation unit independent from said first evaluation unit receiving the series of digital sensor signals; wherein at least a first and second series of digital sensor signals is processed by the second evaluation unit to generate a control signal that is configured to select a sampling frequency controlling the analog-to-digital converter, wherein the first and second series of digital sensor signals are sampled at different sampling frequencies while converting an analog signal by the analog to digital converter, wherein the second evaluation unit further provides for a power estimation of a signal processed by the second evaluation unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A sensor system comprising:
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an acquisition unit comprising an analog to digital converter generating a series of digital sensor signals; a first evaluation unit receiving the series of digital sensor signals for evaluation, wherein the first evaluation unit generates output signals that correspond to a sensor event; a second evaluation unit independent from said first evaluation unit receiving the series of digital sensor signals;
wherein at least a first and second series of digital sensor signals is processed by the second evaluation unit to generate a control signal that is configured to select a sampling frequency controlling the analog-to-digital converter, wherein the first and second series of digital sensor signals are sampled at different sampling frequencies while converting an analog signal by the analog to digital converter;wherein; the first evaluation unit combines pluralities of subsequent digital sensor signals into single output signals; the second evaluation unit is configured to evaluate a first packet of digital sensor signals and a second packet of digital sensor signals which immediately follows the first packet; and each packet comprises digital sensor signals sampled with a different sampling frequency. - View Dependent Claims (17, 18, 19, 20, 21)
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22. A method for sampling sensor signals comprising:
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generating a series of digital sensor signals with an analog to digital converter; generating output signals by a first evaluation unit receiving the series of digital sensor signals that correspond to a sensor event; receiving the series of digital sensor signals by a second evaluation unit independent from said first evaluation unit; processing at least a first and second series of digital sensor signals by the second evaluation unit to generate a control signal; selecting by the control signal a sampling frequency controlling the analog-to-digital converter, wherein the first and second series of digital sensor signals are sampled at different sampling frequencies while converting an analog signal by the analog to digital converter; and performing a power estimation of a signal processed by the second evaluation unit. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
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30. A method for sampling sensor signals comprising:
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generating a series of digital sensor signals with an analog to digital converter; generating output signals by a first evaluation unit receiving the series of digital sensor signals that correspond to a sensor event; receiving the series of digital sensor signals by a second evaluation unit independent from said first evaluation unit; processing at least a first and second series of digital sensor signals by the second evaluation unit to generate a control signal; selecting by the control signal a sampling frequency controlling the analog-to-digital converter, wherein the first and second series of digital sensor signals are sampled at different sampling frequencies while converting an analog signal by the analog to digital converter; and subtracting an output signal from a switchable filter bank receiving the series of digital sensor signals from the series of digital sensor signals and forward a result for further filtering. - View Dependent Claims (31)
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32. A method for sampling sensor signals comprising:
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generating a series of digital sensor signals with an analog to digital converter; generating output signals by a first evaluation unit receiving the series of digital sensor signals that correspond to a sensor event; receiving the series of digital sensor signals by a second evaluation unit independent from said first evaluation unit; processing at least a first and second series of digital sensor signals by the second evaluation unit to generate a control signal; selecting by the control signal a sampling frequency controlling the analog-to-digital converter, wherein the first and second series of digital sensor signals are sampled at different sampling frequencies while converting an analog signal by the analog to digital converter; providing a plurality of sensors; and sequentially acquiring at least one packet of sensor signals from each of the plurality of sensors, wherein each packet comprises a plurality of subsequent measurements from a sensor using a selected sampling frequency. - View Dependent Claims (33, 34, 35)
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Specification