Device for providing a signal in response to a change of the ambient pressure
First Claim
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1. A device for providing a signal in response to a change of ambient pressure for detecting a pressure change as a result of an impact of a motor vehicle, comprising:
- a pressure sensor to provide a pressure signal depending on an ambient pressure; and
a signal processing unit mounted downstream of the pressure sensor and having at least one analog logarithmic system and at least one high-pass filter system, wherein the pressure signal is fed to the analog logarithmic system and an output signal of the analog logarithmic system is fed to the high-pass filter system and an output signal of the high-pass filter system is fed to an analog-to-digital converter.
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Abstract
The invention relates to a device for providing a signal in response to a change of the ambient pressure, comprising a pressure sensor (S) for providing a pressure signal (DS) depending on an ambient pressure (p), and a signal processing unit (SVE) mounted downstream of the pressure sensor (S) and comprising at least one analog logarithmic system and at least one high-pass filter system.
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9 Claims
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1. A device for providing a signal in response to a change of ambient pressure for detecting a pressure change as a result of an impact of a motor vehicle, comprising:
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a pressure sensor to provide a pressure signal depending on an ambient pressure; and
a signal processing unit mounted downstream of the pressure sensor and having at least one analog logarithmic system and at least one high-pass filter system, wherein the pressure signal is fed to the analog logarithmic system and an output signal of the analog logarithmic system is fed to the high-pass filter system and an output signal of the high-pass filter system is fed to an analog-to-digital converter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for providing a signal depending on changes of an ambient pressure for detecting a pressure change as a result of an impact of a motor vehicle, comprising:
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providing a pressure signal depending on an ambient pressure by a pressure sensor; and
generating a logarithm of the pressure signal, high-pass filtering of the logarithmized pressure signal.
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Specification