System And Method For Quantitive Analysis Of Cause Of Tire Trouble

• US 20080115572A1
• Filed: 09/12/2005
• Published: 05/22/2008
• Est. Priority Date: 09/14/2004
• Status: Active Grant

• Current Assignee: Bridgestone Corporation
• Original Assignee: Bridgestone Corporation
• Inventors: Kase, Junichi, Hara, Yuki, Kikuchi, Takashi
• Granted Patent: US 7,451,642 B2
• Time in Patent Office: Days
• US Class Current: 73/146
• CPC Class Codes: G07C 5/008 communicating information to a remotely located station transmission systems for measured values G08C
• CPC Class Codes: G07C 5/085 using electronic data carriers
• CPC Class Codes: G08G 1/205 Indicating the location of the monitored vehicles as destination, e.g. accidents, stolen, rental

Abstract

There is provided a system and method for quantitative analysis of a cause of tire trouble capable of quantitatively analyzing whether the tire trouble is caused by the tire itself or in a matter of harshness of a tire using condition in light of not only a force acting on a tire mounted on a running vehicle but also harshness of a tire using condition such as a traveling speed of the vehicle, level difference of a road surface, a curve and gradient information. The method for quantitative analysis of a cause of tire trouble according to the present invention is characterized by comprising the steps of receiving positional data of a running vehicle from the GPS, simultaneously measuring triaxial accelerations which are accelerations acting on the running vehicle in back-and-forward, right-and-left and up-and-down directions while time synchronizing with the received data, quantitatively analyzing harshness of a tire using condition from the received positional data and the triaxial acceleration data, and displaying an analysis result.

Claims

1. A system for quantitative analysis of a cause of tire trouble, comprising a positional data receiving means for receiving positional data of a running vehicle from the GPS,

an acceleration measuring means for measuring triaxial accelerations which are accelerations acting on the running vehicle in back-and-forward, right- and left and up-and-down directions while time synchronizing with the positional data received by the positional data receiving means,

a database portion for storing the positional data received by the positional information receiving means and the triaxial acceleration data measured by the acceleration measuring means,

a data analyzing means for quantitatively analyzing harshness of a tire using condition, and

a display means for displaying an analysis result from the data analyzing means.

2. The system for quantitative analysis of a cause of tire trouble according to claim 1, wherein the positional data is planar positional data in light of only a horizontal plane.

3. The system for quantitative analysis of a cause of tire trouble according to claim 1, wherein the positional data is stereoscopic positional data in light of both horizontal and vertical directions.

4. The system for quantitative analysis of a cause of tire trouble according to claim 3, wherein the data analysis means calculates a traveling speed of the vehicle, level difference of a road surface and gradient information from the stereoscopic positional data.

5. The system for quantitative analysis of a cause of tire trouble according to claim 1, wherein the data analysis means calculates a frequent distribution of acceleration in an arbitrarily selected traveling block of the vehicle from the obtained triaxial acceleration data.

6. The system for quantitative analysis of a cause of tire trouble according to claim 1, wherein the quantitative analysis system has a player function capable of displaying the data wanted to be displayed among the obtained data with arbitrarily selecting a desired traveling block from all of the traveling track of the vehicle.

7. A method for quantitative analysis of a cause of tire trouble, comprising the steps of receiving positional data of a running vehicle from the GPS, simultaneously measuring triaxial accelerations which are accelerations acting on the running vehicle in back-and-forward, right-and-left and up-and-down directions while time synchronizing with the received data, quantitatively analyzing harshness of a tire using condition from the received positional data and the triaxial acceleration data, and displaying an analysis result.

8. The method for quantitative analysis of a cause of tire trouble according to claim 7, wherein the positional data is planar positional data in light of a horizontal plane only.

9. The method for quantitative analysis of a cause of tire trouble according to claim 7, wherein the positional data is stereoscopic positional data in light of both horizontal and vertical directions.

10. The method for quantitative analysis of a cause of tire trouble according to claim 9, wherein the method calculates a traveling speed of the vehicle, level difference of a road surface and gradient information from the stereoscopic positional data.

11. The method for quantitative analysis of a cause of tire trouble according to claim 7, wherein the method calculates a frequent distribution of acceleration in an arbitrarily selected traveling block of the vehicle from the obtained triaxial acceleration data.

12. The method for quantitative analysis of a cause of tire trouble according to claim 7, wherein the method has a player function capable of displaying the data wanted to be displayed among the obtained data with arbitrarily selecting a desired traveling block from all of the traveling track of the vehicle.

13. The method for quantitative analysis of a cause of tire trouble according to claim 7, wherein the harshness of the tire using condition is quantitatively analyzed by using a value obtained by summing tendencies of causing a trouble in a bead portion and a trouble in a belt portion.

14. The method for quantitative analysis of a cause of tire trouble according to claim 13, wherein the tendency of causing a trouble in a bead portion is calculated from values of a ratio of loading force acting on the tire, acceleration in the up-and-down and back-and-force directions, and gradient of the road surface.

15. The method for quantitative analysis of a cause of tire trouble according to claim 13, wherein the tendency of causing a trouble in a tread portion is preferably calculated from values of a heat factor of the tire and acceleration in the lateral direction acting on the tire.