# US 9,038,465 B2 · Method of setting valid output sections of 2-axis acceleration sensor or 3-axis acceleration sensor

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- Number: US 9,038,465 B2
- Document ID: US9038465B2
- Status: Granted
- Kind: B2
- Application number: 13/482,833
- Filed: 2012-05-29
- Published: 2013-02-28
- Granted: 2015-05-26
- Earliest claimed: 2011-08-29
- Assignees: Mando Corporation
- Applicants: Jae Hyung Chun
- Inventors: Jae Hyung Chun
- Web page: https://patentgrep.com/patent/US9038465B2

## CPC

- G01P 21/00: Testing or calibrating of apparatus or devices covered by the preceding groups
- G01P 15/00: Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P: MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT (measuring or recording blood flow A61B5/02, A61B8/06; monitoring speed or deceleration of electrically-propelled vehicles B60L3/00; vehicle lighting systems adapted to indicate speed B60Q1/54; determining position or course in navigation, measuring ground distance in geodesy or surveying G01C; combined measuring devices for measuring two or more variables of movement G01C23/00; measuring velocity of sound G01H; measuring velocity of light G01J7/00; measuring direction or velocity of solid objects by reception or emission of radiowaves or other waves and based on propagation effects, e.g. Doppler effect, propagation time, direction of propagation, G01S; measuring speed of nuclear radiation G01T; measuring acceleration of gravity G01V; {measuring or recording the speed of trains B61L23/00; speed indicators incorporated in motor vehicles B60K35/00; measuring frequency or phase G01R; traffic control G08G})

## 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

### Claim 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.

### Claim 2 (depends on 1)

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.

### Claim 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.

### Claim 4 (depends on 3)

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.