초록 ▼

A vehicle rollover detection apparatus and method are provided for detecting an overturn condition of the vehicle. The rollover detection apparatus includes an angular rate sensor sensing angular rate of the vehicle, and a vertical accelerometer for sensing vertical acceleration of the vehicle. A co

A vehicle rollover detection apparatus and method are provided for detecting an overturn condition of the vehicle. The rollover detection apparatus includes an angular rate sensor sensing angular rate of the vehicle, and a vertical accelerometer for sensing vertical acceleration of the vehicle. A controller processes the sensed angular rate signal and integrates it to produce an attitude angle. The vertical acceleration signal is processed to determine an inclination angle of the vehicle. The rollover detection apparatus adjusts the attitude angle as a function of the inclination angle and compares the adjusted attitude angle and the processed angular rate signal to a threshold level to provide a vehicle overturn condition output signal. Additionally, the rollover detection apparatus detects a near-rollover event and adjusts the variable threshold in response thereto to prevent deployment of a vehicle overturn condition, thus providing immunity to such events.

대표청구항 ▼

A vehicle rollover detection apparatus and method are provided for detecting an overturn condition of the vehicle. The rollover detection apparatus includes an angular rate sensor sensing angular rate of the vehicle, and a vertical accelerometer for sensing vertical acceleration of the vehicle. A co

A vehicle rollover detection apparatus and method are provided for detecting an overturn condition of the vehicle. The rollover detection apparatus includes an angular rate sensor sensing angular rate of the vehicle, and a vertical accelerometer for sensing vertical acceleration of the vehicle. A controller processes the sensed angular rate signal and integrates it to produce an attitude angle. The vertical acceleration signal is processed to determine an inclination angle of the vehicle. The rollover detection apparatus adjusts the attitude angle as a function of the inclination angle and compares the adjusted attitude angle and the processed angular rate signal to a threshold level to provide a vehicle overturn condition output signal. Additionally, the rollover detection apparatus detects a near-rollover event and adjusts the variable threshold in response thereto to prevent deployment of a vehicle overturn condition, thus providing immunity to such events. VD, obtained by encoding audio data in a plurality of channels sampled at different sampling frequencies, said DVD audio reproducing device comprising: a reading means for reading out the multi-channel audio data from the DVD; a decoding means for decoding the multi-channel audio data read by said reading means; a DAC means for converting, from digital to analog, the audio data in each of the channels obtained after the decoding by said DAC means; and an LPF means for extracting, from an audio signal in each of the channels obtained after the D/A conversion by said DAC means, any component equal to or lower than a cutoff frequency assigned in accordance with a sampling frequency of each of the audio signals, and outputting the same in a form of an analog audio signal for every channel; wherein said decoding means includes a sampling frequency converting means for executing sampling frequency conversion with respect to the audio data in at least one channel obtained by the decoding so that a sampling frequency thereof coincides with that of the other channels; and said DAC means includes a digital to analog converter for converting, from digital to analog in a time sharing manner, audio data in the plurality of channels equalized in sampling frequency through the sampling frequency conversion. 6. A DVD audio reproducing device for reproducing six-channel audio data, recorded on a DVD, obtained by encoding audio data in six channels sampled at different sampling frequencies, said DVD audio reproducing device comprising: a reading means for reading out the six-channel audio data from the DVD: a decoding means for decoding the six-channel audio data read from said reading means; a DAC means for converting, from digital to analog, the audio data in each of the channels obtained after the decoding by said decoding means; and an LPF means for extracting, from an audio signal in each of the channels obtained after the D/A conversion by said DAC means, any component equal to or lower than a cutoff frequency assigned in accordance with a sampling frequency of each of the audio signals, and outputting the same in a form of an analog audio signal for every channel; wherein said decoding means includes a sampling frequency converting means for executing sampling frequency conversion with respect to the audio data in three channels obtained by the decoding so that each sampling frequency thereof coincides with that of three other channels; and said DAC means includes three digital to analog converters for converting, from digital to analog in a time sharing manner, the audio data in three channels equalized in sampling frequency through the sampling frequency conversion. 7. The DVD audio reproducing device according to claim 6, wherein said LPF means includes six variable low-pass filters, to which the audio signal in each of the channels obtained after the D/A conversion by said DAC means is inputted, and which have variable filtering characteristics of passing only a component equal to or lower than a cutoff frequency assigned to each of the audio signals; and wherein said decoding means, in relation to the sampling frequency conversion, includes a control means for controlling the variable filtering characteristics of each of said six variable low-pass filters. 8. The DVD audio reproducing device according to claim 6, wherein said LPF means includes six low-pass filters, to which the audio signal in each of the channels obtained after the D/A conversion by said DAC means is inputted, and which have unchanging filtering characteristics of passing only a component equal to or lower than the cutoff frequency assigned to each of the audio signals. 9. The DVD audio reproducing device according to claim 6, wherein said sampling frequency converting means executes the sampling frequency conversion by interpolation when the sampling frequency is over-sampled, and by decimation when the sampling frequency is down-sampled.