Restraining system comprising a restraining device for protecting at least one passenger and a method for controlling a restraining system
First Claim
1. A restraint system having a restraint device for protecting at least one passenger, the restraint system having an acceleration sensor (1) for measuring an acceleration of the vehicle, an analog/digital converter (2) for converting an output signal of the acceleration sensor (1) into a digital signal corresponding to the acceleration, a processor (3) for carrying out a wavelet transformation of the digital signal into a frequency signal, a memory (4), and an actuator (5) for controlling the restraint device (6), wherein the processor (3) subdivides the frequency signal into individual frequency ranges, the processor (3), for each frequency range measures the specific maximum and the specific average signal energy in order to extract features;
- the processor (3) determines a crash type on the basis of the features, the processor (3) determines from the frequency signal a measure for the braking acceleration energy; and
the processor (3), as a function of the measure and of the crash type, transmits a control signal to the actuator (5).
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Accused Products
Abstract
A restraint system having a restraint device for protecting at least one passenger and a method for controlling a restraint system are proposed, which act so as to transform using a wavelet transformation, a signal measured by an acceleration sensor into a frequency range and in order to determine from the transformed signal the optimal triggering time point for the restraint device. For this purpose, the wavelet-transformed signal, on the one hand, is used for determining features in order to determine a crash type, and, on the other hand, to determine the braking acceleration energy. If the braking acceleration energy lies above a preestablished threshold value and if the identified crash type requires a triggering of the restraint system, then the restraint system is triggered.
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Citations
8 Claims
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1. A restraint system having a restraint device for protecting at least one passenger, the restraint system having an acceleration sensor (1) for measuring an acceleration of the vehicle, an analog/digital converter (2) for converting an output signal of the acceleration sensor (1) into a digital signal corresponding to the acceleration, a processor (3) for carrying out a wavelet transformation of the digital signal into a frequency signal, a memory (4), and an actuator (5) for controlling the restraint device (6), wherein the processor (3) subdivides the frequency signal into individual frequency ranges, the processor (3), for each frequency range measures the specific maximum and the specific average signal energy in order to extract features;
- the processor (3) determines a crash type on the basis of the features, the processor (3) determines from the frequency signal a measure for the braking acceleration energy; and
the processor (3), as a function of the measure and of the crash type, transmits a control signal to the actuator (5). - View Dependent Claims (2, 3, 4)
- the processor (3) determines a crash type on the basis of the features, the processor (3) determines from the frequency signal a measure for the braking acceleration energy; and
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5. A method for controlling a restraint system (6), the acceleration of a vehicle being measured as an acceleration signal, the acceleration signal being digitalized into a digital signal, the digital signal being transformed using a wavelet transformation into a frequency signal, the restraint system (6) being controlled by an actuator (5), wherein the frequency signal is subdivided into frequency ranges, the specific maximum and specific average signal energies are determined for each frequency range in order to extract features;
- the crash type is determined on the basis of the features;
a measure for the braking acceleration energy is determined from the frequency signal; and
a control signal is transmitted to the actuator (5) as a function of the measure and of the crash type. - View Dependent Claims (6, 7, 8)
- the crash type is determined on the basis of the features;
Specification