Method for recording vehicle-relevant data, in particular for detecting and for evaluating minor damage, sensor arrangement for installation in a vehicle and vehicle having the sensor arrangement for carrying out the method
First Claim
1. A method for recording vehicle-relevant data, in particular for detecting and for evaluating damage to a vehicle in which structure-borne noise is detected and evaluated, comprising:
- recording an entire frequency spectrum of the structure-borne noise caused by an event,wherein the filter lies at a frequency of at least 500 Hz,dividing the frequency spectrum with a filter into a lower frequency range and into an upper frequency range,characterizing the event by at least one amplitude in the upper frequency range, wherein the event having an amplitude in the upper frequency range is included in an envelope curve analysis,determining a lower power density, and for the upper frequency range, determining an upper power density in the envelope curve analysis for the lower frequency range,determining a relative measured value from the ratio of the upper power density to the lower power density, andevaluating, by a controller, the event based on the relative measured value and storing the event,wherein the event has a plurality of frequency spectra recorded consecutively in time which are combined for the envelope curve analysis of the event and the plurality of frequency spectra is represented in an amplitude curve of the upper frequency range and an amplitude curve of the entire frequency spectrum, and wherein by integrating the amplitude curve of the upper frequency range and the entire frequency spectrum calculates their respective power densities,the event is stored together with vehicle status data and ambient conditions,at least one of the vehicle status data and the ambient conditions are included in the evaluation of the event,a plurality of measured values are detected and combined for the event and a comprehensive damage pattern is prepared from the plurality measured values, andthe plurality of measured values for the event is compared with a stored frequency pattern for a specific damage.
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Accused Products
Abstract
A method for recording vehicle-relevant data, in particular for detecting and evaluating damage to a vehicle in which structure-borne noise caused by an event, such as damage or contact, is detected and evaluated. The noise is recorded with its entire frequency spectrum, the frequency spectrum is divided into a lower frequency range and an upper frequency range, and an event is characterized by at least one amplitude in the upper frequency range. The event having an amplitude in the upper frequency range is included in an envelope curve analysis, in which a lower power density and upper power density are determined for a lower and upper frequency range, respectively. A relative measured value is determined from the ratio of the upper power density to the lower power density, an evaluation of the event is made by means of the relative measured value, and the event is stored.
8 Citations
6 Claims
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1. A method for recording vehicle-relevant data, in particular for detecting and for evaluating damage to a vehicle in which structure-borne noise is detected and evaluated, comprising:
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recording an entire frequency spectrum of the structure-borne noise caused by an event, wherein the filter lies at a frequency of at least 500 Hz, dividing the frequency spectrum with a filter into a lower frequency range and into an upper frequency range, characterizing the event by at least one amplitude in the upper frequency range, wherein the event having an amplitude in the upper frequency range is included in an envelope curve analysis, determining a lower power density, and for the upper frequency range, determining an upper power density in the envelope curve analysis for the lower frequency range, determining a relative measured value from the ratio of the upper power density to the lower power density, and evaluating, by a controller, the event based on the relative measured value and storing the event, wherein the event has a plurality of frequency spectra recorded consecutively in time which are combined for the envelope curve analysis of the event and the plurality of frequency spectra is represented in an amplitude curve of the upper frequency range and an amplitude curve of the entire frequency spectrum, and wherein by integrating the amplitude curve of the upper frequency range and the entire frequency spectrum calculates their respective power densities, the event is stored together with vehicle status data and ambient conditions, at least one of the vehicle status data and the ambient conditions are included in the evaluation of the event, a plurality of measured values are detected and combined for the event and a comprehensive damage pattern is prepared from the plurality measured values, and the plurality of measured values for the event is compared with a stored frequency pattern for a specific damage. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification