Apparatus and method for monitoring tire pressure
First Claim
1. A tire pressure monitoring method comprising:
- detecting, by a frequency detection device of a tire pressure monitoring apparatus, a resonant frequency according to a tire pressure;
calculating, by the tire pressure monitoring apparatus, an average frequency and a frequency variance by accumulating the resonant frequency;
locating, by the tire pressure monitoring apparatus, a first average variance point corresponding to the average frequency and the frequency variance, on an average-variance plane, and locating second average variance points corresponding to average frequencies and frequency variances of resonant frequencies which are measured in advance for types of tires, on the average-variance plane;
determining, by the tire pressure monitoring apparatus, a type of a tire in consideration of distances between the first average variance point and the second average variance points on the average-variance plane; and
setting, by the tire pressure monitoring apparatus, a low-pressure frequency according to the determined type of the tire, as a reference low-pressure frequency for determining whether the tire pressure is a low pressure.
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Abstract
A tire pressure monitoring apparatus includes a frequency detection unit configured to detect a resonant frequency according to a tire pressure; a calculation unit configured to accumulate the resonant frequency and calculate an average frequency and a frequency variance; a coordinate system setting unit configured to locate a first average variance point corresponding to the average frequency and the frequency variance, on an average-variance plane, and locate second average variance points corresponding to average frequencies and frequency variances of resonant frequencies measured for types of tires, on the average-variance plane; a tire determination unit configured to determine a type of a tire in consideration of distances between the first and second average variance points; and a low-pressure frequency setting unit configured to set a low-pressure frequency according to the determined type of the tire, as a reference low-pressure frequency for determining whether the tire pressure is a low pressure.
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Citations
6 Claims
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1. A tire pressure monitoring method comprising:
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detecting, by a frequency detection device of a tire pressure monitoring apparatus, a resonant frequency according to a tire pressure; calculating, by the tire pressure monitoring apparatus, an average frequency and a frequency variance by accumulating the resonant frequency; locating, by the tire pressure monitoring apparatus, a first average variance point corresponding to the average frequency and the frequency variance, on an average-variance plane, and locating second average variance points corresponding to average frequencies and frequency variances of resonant frequencies which are measured in advance for types of tires, on the average-variance plane; determining, by the tire pressure monitoring apparatus, a type of a tire in consideration of distances between the first average variance point and the second average variance points on the average-variance plane; and setting, by the tire pressure monitoring apparatus, a low-pressure frequency according to the determined type of the tire, as a reference low-pressure frequency for determining whether the tire pressure is a low pressure. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification