DEVICE AND METHOD FOR ACTIVATING PASSENGER PROTECTION MEANS
First Claim
Patent Images
1. A device for activating passenger protection means (PS) comprising an analyzing circuit (μ
- C) which activates the passenger protection means (PS) as a function of a first signal of an acceleration sensor system (BS1, BS2) and a second signal of a structure-borne noise sensor system (K1, K2),wherein the analyzing circuit (μ
C) determines the activation as a function of a position of a vector composed of at least two first features, which are formed using the first signal, in relation to a characteristic curve, the characteristic curve being modified as a function of the second signal.
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Abstract
In a method and a device for activating passenger protection device(s), the passenger protection device(s) are activated as a function of a first signal of an acceleration sensor system and a second signal of a structure-borne noise sensor system. The activation is decided as a function of a position of a vector composed of at least two features of the first signal in relation to a characteristic curve, the characteristic curve being modified as a function of the second signal.
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Citations
30 Claims
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1. A device for activating passenger protection means (PS) comprising an analyzing circuit (μ
- C) which activates the passenger protection means (PS) as a function of a first signal of an acceleration sensor system (BS1, BS2) and a second signal of a structure-borne noise sensor system (K1, K2),
wherein the analyzing circuit (μ
C) determines the activation as a function of a position of a vector composed of at least two first features, which are formed using the first signal, in relation to a characteristic curve, the characteristic curve being modified as a function of the second signal.
- C) which activates the passenger protection means (PS) as a function of a first signal of an acceleration sensor system (BS1, BS2) and a second signal of a structure-borne noise sensor system (K1, K2),
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1-15. -15. (canceled)
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2. The device as recited in claim 1,
wherein the analyzing circuit (μ - C) has an integrator for forming the at least two first features which may used for a single and/or double integration of the first signal.
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3. The device as recited in claim 1 or 2,
wherein the characteristic curve is modified as a function of at least one second feature of the second signal, the analyzing circuit (μ - C) having band-pass filtering and subsequent envelope formation for forming the at least one second feature.
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4. The device as recited in claim 3,
wherein the analyzing circuit (μ - C) has an absolute-value generator and a low-pass formation for envelope formation.
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5. The device as recited in claim 1,
wherein the acceleration sensor system (BS1, BS2) and the structure-borne noise sensor system (K1, K2) are embodied in a single sensor system, the separation between the first signal and the second signal being implemented via filters.
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6. The device as recited in claim 1,
wherein the acceleration sensor system (BS1, BS2) and the structure-borne noise sensor system (K1, K2) are embodied in separate sensor systems, the acceleration sensor system (BS1, BS2) and the structure-borne noise sensor system (K1, K2) being provided in one structural unit.
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7. The device as recited in one of claims 1 through 6,
wherein the analyzing circuit (μ - C) additionally determines whether a triggering case exists on the basis of the vector also a comparison with a second characteristic curve.
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8. The device as recited in one of the preceding claims,
wherein the analyzing circuit (μ - C) determines a movement of a passenger of the vehicle based on the first signal, the analyzing circuit (μ
C) determining a triggering time for the passenger protection means as a function of the movement.
- C) determines a movement of a passenger of the vehicle based on the first signal, the analyzing circuit (μ
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9. A method for activating passenger protection means, activating the passenger protection means as a function of a first signal of an acceleration sensor system and a second signal of a structure-borne noise sensor system,
wherein the activation is decided as a function of a position of a vector composed of at least two features, which are formed using the first signal, in relation to a characteristic curve, the characteristic curve being modified as a function of the second signal.
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10. The method as recited in claim 9,
wherein the at least two first features are determined with the aid of single and/or double integration.
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11. The method as recited in claim 9 or 10,
wherein the characteristic curve is modified as a function of at least one second feature, the at least one second feature being generated from the second signal with the aid of band-pass filtering and subsequent envelope formation.
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12. The method as recited in claim 11,
wherein the envelope formation is achieved with the aid of absolute-value generation and low-pass filtering.
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13. The method as recited in claim 9,
wherein in a common sensor system for the acceleration sensor system and the structure-borne noise sensor system the separation of the first and the second signal is achieved by filtering.
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14. The method as recited in one of claims 9 through 13,
wherein, based on the vector and a comparison with a second characteristic curve, it is additionally determined whether a triggering case exists.
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15. The method as recited in one of claims 9 through 13,
wherein, based on the first signal, a movement of a passenger of the vehicle is determined, a triggering time being determined for the passenger protection means as a function of the movement.
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16. A device for activating a passenger protection device, comprising:
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an analysis circuit adapted to activate the passenger protection device as a function of a first signal of an acceleration sensor system and a second signal of a structure-borne noise sensor system; wherein the analysis circuit is adapted to determine an activation as a function of a position of a vector composed of at least two first features, which are formed using the first signal, in relation to a characteristic curve, the characteristic curve being modified as a function of the second signal. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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24. A method for activating a passenger protection device, comprising:
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activating the passenger protection device as a function of a first signal of an acceleration sensor system and a second signal of a structure-borne noise sensor system; wherein the activation is decided as a function of a position of a vector composed of at least two first features, which are formed using the first signal, in relation to a characteristic curve, the characteristic curve being modified as a function of the second signal. - View Dependent Claims (25, 26, 27, 28, 29, 30)
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Specification