Tire degradation estimating device, and tire degradation estimating method

An inference device, tire technology, applied in the direction of tire tread/tread pattern, tire measurement, tire parts, etc., can solve the problems of erroneous wear status evaluation, cumbersome inspection work, etc., and achieve the effect of high accuracy of calculation amount

Pending Publication Date: 2022-02-01
ALPS ALPINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although tread wear marks provided in tire grooves are used for inspection based on visual observation, ...

Method used

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  • Tire degradation estimating device, and tire degradation estimating method
  • Tire degradation estimating device, and tire degradation estimating method
  • Tire degradation estimating device, and tire degradation estimating method

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Experimental program
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no. 1 approach

[0046] Such as figure 1 As shown, the tire deterioration estimation method of this embodiment is a tire deterioration estimation method using a tire deterioration estimation device disposed on the inner surface of the tire, and includes a deformation speed measurement step (S11), a calculation step (S12), and an estimation step (S13 ). Each step will be described below.

[0047] The deformation speed measurement step ( S11 ) is a step of measuring the deformation speed of a portion of the rotating tire 200 where the tire deterioration estimation device 100 is disposed, that is, the tire deformation speed. figure 2 (a) is a front view schematically showing deformation when the tire 200 is rotating, figure 2 (b) is a waveform schematically showing time-series changes in the tire deformation speed and tire deformation amount measured by the tire deterioration estimation device 100 in the rotating tire 200 . In the figure, the solid line indicates the time-series change of th...

no. 2 approach

[0056] Such as image 3 As shown, the tire deterioration estimation method of this embodiment differs from the first embodiment in that a calculation step ( S22 ) is provided instead of the above-mentioned calculation step ( S12 ). The calculation step ( S22 ) calculates a second peak value of the tire deformation speed when the tire touches the ground in addition to the first peak value.

[0057] The second peak is the peak with the largest peaks on the top side and the bottom side. In the calculation step (S22), the second peak value is calculated in addition to the first peak value, so that the first peak value and the second peak value can be used in the estimation step (S23). Accordingly, in estimating the degree of deterioration of the tire, it is possible to take into account the influence of the change in the characteristics of the tire due to an external temperature change or the like, and thus the estimation accuracy can be improved.

[0058] Such as figure 2 As ...

no. 3 approach ＞

[0063] The method of estimating the degree of deterioration of the tire in this embodiment replaces the time-series change of the deformation speed of the tire ( figure 2 The solid line of (b)), using the time series change according to the deformation of the tire ( figure 2 The third peak value of the tire deformation determined by the dotted line in (b), infers the degree of deterioration of the tire.

[0064] Such as Figure 4 As shown, the method for estimating the degree of deterioration of a tire according to this embodiment includes a deformation amount measuring step ( S31 ), a calculating step ( S32 ), and an estimating step ( S33 ).

[0065] The deformation amount measuring step ( S31 ) is a step of measuring the time-series change of the tire deformation amount, for example, measuring the tire deformation speed while the tire is rotating, and integrating the tire deformation speed to measure the tire deformation amount. Thereby, a waveform of a time-series chang...

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Abstract

A tire degradation estimating method according to an embodiment of the present invention utilizes a tire degradation estimating device configured on the inner side surface of a tire. The method includes: a deformation speed measuring step (S11) of measuring a tire deformation speed, which is the deformation speed of the tire when the tire is rotating, and obtaining a time-series variation of the tire deformation speed; a calculating step (S12) of calculating a peak value of the tire deformation speed from the time-series variation of the tire deformation speed; and an estimating step (S13) of estimating the degree of degradation of the tire by using a first peak value, which is the peak value of the tire deformation speed before lead-in of the tire or after trail-out of the tire, in the time-series variation of the tire deformation speed. Accordingly, the degree of degradation of a tire can be estimated.

Description

technical field [0001] The present invention relates to a tire deterioration estimating device and a tire deterioration estimating method for estimating the degree of deterioration such as tire wear. Background technique [0002] If tire wear progresses, the grip performance when running on a dry road surface and the drainage performance to drain water between the tire and the road surface when running on a wet road surface will decrease. Therefore, drivers and vehicle managers check the wear state of the tread by visual observation, and replace the tire before the usage limit is exceeded in order to ensure safety performance. Although tread wear marks provided in tire grooves are used for inspection based on visual observation, the inspection work is cumbersome, and there is also the possibility of erroneous evaluation of the wear state. In the case of erroneous evaluation, tires with reduced performance will continue to be used, which is not preferable from the viewpoint ...

Claims

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Application Information

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IPC IPC(8): G01M17/02B60C19/00H01L41/08H01L41/113
CPCG01M17/02B60C11/243B60C11/246B60C2019/007H10N30/00H10N30/30B60C23/064
Inventor 不藤平四郎筱原英司市濑真哉户张博之山本秋人大野裕树
Owner ALPS ALPINE CO LTD
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