Apparatus and method for evaluating a degree of a safety in traveling of a vehicle
First Claim
1. An apparatus for evaluating a degree of a safety in traveling of a vehicle provided with wheels each having a tire mounted thereon, while the vehicle is traveling on a road surface, the apparatus comprising:
- acceleration data acquiring means for acquiring acceleration data in time series at a fixed position of the tire, the acceleration being generated by an external force applied from the road surface to the tire which is rotating, while the vehicle is traveling on the road surface;
spectrum obtaining means for obtaining a spectrum of the acceleration by subjecting the acquired time series acceleration data to frequency analysis;
peak value detecting means for detecting a peak value of the spectrum of the acceleration in a frequency range of 500 Hz-1500 Hz; and
traveling safety evaluating means for evaluating a degree of a safety in traveling of the vehicle according to the detected peak value.
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Accused Products
Abstract
The apparatus acquires acceleration data in time series at a fixed position of a tire while a vehicle having the tire is traveling on a road surface, obtains a spectrum of the acceleration by subjecting the acquired time series acceleration data to frequency analysis, and detects a peak value of the spectrum of the acceleration in a frequency range of 500 Hz-1500 Hz. The apparatus evaluates a degree of a safety in traveling of the vehicle according to the detected peak value. The acceleration data is acquired by an acceleration sensor mounted on the fixed position of the tire.
29 Citations
11 Claims
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1. An apparatus for evaluating a degree of a safety in traveling of a vehicle provided with wheels each having a tire mounted thereon, while the vehicle is traveling on a road surface, the apparatus comprising:
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acceleration data acquiring means for acquiring acceleration data in time series at a fixed position of the tire, the acceleration being generated by an external force applied from the road surface to the tire which is rotating, while the vehicle is traveling on the road surface; spectrum obtaining means for obtaining a spectrum of the acceleration by subjecting the acquired time series acceleration data to frequency analysis; peak value detecting means for detecting a peak value of the spectrum of the acceleration in a frequency range of 500 Hz-1500 Hz; and traveling safety evaluating means for evaluating a degree of a safety in traveling of the vehicle according to the detected peak value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for evaluating a degree of a safety in traveling of a vehicle provided with wheels each having a tire mounted thereon, while the vehicle is traveling on a road surface, the method comprising:
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an acceleration data acquiring step for acquiring acceleration data in time series at a fixed position of the tire, the acceleration being generated by an external force applied from the road surface to the tire which is rotating, while the vehicle is traveling on the road surface; a spectrum obtaining step for obtaining a spectrum of the acceleration by subjecting the acquired time series acceleration data to frequency analysis; a peak value detecting step for detecting a peak value of the spectrum of the acceleration in a frequency range of 500 Hz-I 500 Hz; and a traveling safety evaluating step for evaluating a degree of a safety in traveling of the vehicle according to the detected peak value. - View Dependent Claims (10, 11)
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Specification