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Device and method for estimating tire pressure in vehicle

A technology for estimating device and tire pressure, applied in the direction of measuring device, tire measurement, tire parts, etc., can solve the problem of difficult identification of tire pressure, and achieve the effect of fast and accurate determination

Active Publication Date: 2016-05-25
HL MANDO CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, in the above-mentioned method, when the change in frequency is small, it is less easy to recognize the change in tire pressure because only the change amount of the resonant frequency value of a signal is calculated

Method used

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  • Device and method for estimating tire pressure in vehicle
  • Device and method for estimating tire pressure in vehicle
  • Device and method for estimating tire pressure in vehicle

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Embodiment Construction

[0033] Embodiments of the present invention will be described in detail below with the accompanying drawings. The embodiments discussed below are provided by way of example to fully transfer the concept of the present invention to those skilled in the art using the techniques to which the present invention pertains. The present invention is not limited to the following examples, but can be implemented in other ways. In order to clarify the present invention, description of irrelevant components will be omitted from the drawings, and the width, length or thickness of the components in the drawings can be exaggerated for convenience. The same reference numerals represent the same components throughout the specification.

[0034] In this embodiment, the frequency bands obtained by Fast Fourier Transform (FFT) signal processing, the FFT of the resonant frequency bands for each tire pressure state can be calculated on the normal state and deflation state of the tire through actual...

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Abstract

The invention discloses a device and a method for estimating tire pressure in a vehicle, the method for estimating the tire pressure comprises the steps: the FFT (Fast Fourier Transform) is performed on a wheel speed signal to obtain an FFT signal pattern of a resonance frequency band of an FFT signal, the FFT signal pattern saves a PCA (Principal Component Analysis) weighting coefficient to execute the PCA and saves an LDA (Linear Discriminant Analysis) differentiate coefficient to execute LDA, so as to distinguish a plurality of tire pressure states, the method of the device for estimating the tire pressure comprises comprises: the wheel signal is detected by a wheel speed sensor; the FFT is executed to the detected wheel signal; the PCA applying the saved PCA weighting coefficient projects the FFT signal pattern of the resonance frequency band of the FFT signal to a PCA space; the corresponding projected data of the PCA space execute the LDA adopting the saved LDA differentiate coefficient, so as to judge a tire pressure state of the corresponding projected data of the PCA space.

Description

technical field [0001] The present invention relates to a device and method for estimating tire pressure, in particular based on the wheel speed detected by a wheel speed sensor for detecting the wheel speed of a vehicle. Background technique [0002] In recent years, the demand for improving the driving stability or mileage of vehicles has been increasing, and a large amount of research and technological development have continued to meet the demand. [0003] Tire pressure status is one of the biggest factors affecting driving stability or mileage. The tires may become worn or the tire pressure may leak after the vehicle has been driven for an extended period of time. [0004] Such as changes in tire pressure will deteriorate driving stability or mileage. Therefore, it is important to continuously detect and monitor the tire pressure. [0005] In the prior art, the tire pressure can be estimated indirectly by detecting the difference between the frequency of the wheel sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C23/04
CPCB60C23/04B60C23/062B60C23/061G01L17/00
Inventor 金世雄
Owner HL MANDO CORP
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