Method of setting valid output sections of 2-axis acceleration sensor or 3-axis acceleration sensor

• US 9,038,465 B2
• Filed: 05/29/2012
• Issued: 05/26/2015
• Est. Priority Date: 08/29/2011
• Status: Active Grant

• Current Assignee: HL Mando Corporation (Halla Holdings Corporation)
• Original Assignee: Mando Corporation
• Inventors: Chun, Jae Hyung
• Primary Examiner(s): KWOK, HELEN C
• Application Number:
  US13/482,833
• Publication Number:
  US 20130047725A1
• Time in Patent Office: 1,092 Days
• Field of Search: 735/10, 735/11, 731/46, 735/140.1, 702/141, 702/158
• US Class Current: 73/514.01
• CPC Class Codes: G01P 15/00 Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
• CPC Class Codes: G01P 21/00 Testing or calibrating of apparatus or devices covered by the preceding groups

Abstract

Disclosed herein is a method of setting valid output sections of a 3-axis acceleration sensor mounted within a tire of a vehicle, including setting an output signal of the 3-axis acceleration sensor in the z-axis direction as a reference signal, setting a specific section of the output signal in the z-axis direction as a valid section where a part of the tire where the 3-axis acceleration sensor is mounted contacts a road surface, and setting sections of output signals of the 3-axis acceleration sensor in the x-axis and y-axis directions corresponding to the valid section in the z-axis direction as valid sections in the x-axis and y-axis directions. The method sets precise valid sections applied to detect information between the tire and a ground surface so as to minimize a component of a noise section by connecting output signals in the x-axis, y-axis and z-axis directions.

Claims

1. A method of setting valid output sections of a 3-axis acceleration sensor mounted within a tire of a vehicle to measure accelerations in x-axis, y-axis and z-axis directions, comprising:

setting an output signal of the 3-axis acceleration sensor in the z-axis direction as a reference signal, wherein the z-axis direction is perpendicular to a road surface;

setting a specific section of the output signal in the z-axis direction as a valid section where a part of the tire where the 3-axis acceleration sensor is mounted contacts the road surface; and

setting sections of output signals of the 3-axis acceleration sensor in the x-axis and y-axis directions corresponding to the valid section in the z-axis direction as valid sections in the x-axis and y-axis directions,

wherein the specific section of the output signal in the z-axis direction is a section where a positive (+) peak value, a negative (−

) peak value, and a positive (+) peak value of the output signal in the z-axis direction are represented.

2. The method according to claim 1, further comprising detecting information of the tire and the road surface by processing the output signals only in the set valid sections in the x-axis, y-axis, and the z-axis directions.

3. A method of setting valid output sections of a 2-axis acceleration sensor mounted within a tire of a vehicle to measure accelerations in x-axis and z-axis directions, comprising:

setting an output signal of the 2-axis acceleration sensor in the z-axis direction as a reference signal, wherein the z-axis direction is perpendicular to a road surface;

setting a specific section of the output signal in the z-axis direction as a valid section where a part of the tire where the 2-axis acceleration sensor is mounted contacts the road surface; and

setting a section of an output signal of the 2-axis acceleration sensor in the x-axis direction corresponding to the valid section in the z-axis direction as a valid section in the x-axis direction,

wherein the specific section of the output signal in the z-axis direction is a section where a positive (+) peak value, a negative (−

) peak value, and a positive (+) peak value of the output signal in the z-axis direction are represented.

4. The method according to claim 3, further comprising detecting information of the tire and the road surface by processing signals only in the set valid sections in the x-axis and z-axis directions.