CA2135383A1 - Calibration Method for a Relative Heading Sensor - Google Patents

Calibration Method for a Relative Heading Sensor

Info

Publication number
CA2135383A1
CA2135383A1 CA 2135383 CA2135383A CA2135383A1 CA 2135383 A1 CA2135383 A1 CA 2135383A1 CA 2135383 CA2135383 CA 2135383 CA 2135383 A CA2135383 A CA 2135383A CA 2135383 A1 CA2135383 A1 CA 2135383A1
Authority
CA
Canada
Prior art keywords
sensor
heading sensor
absolute
relative heading
relative
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA 2135383
Other languages
French (fr)
Other versions
CA2135383C (en
Inventor
Wei-Wen Kao
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bosch Corp
Original Assignee
Wei-Wen Kao
Zexel Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wei-Wen Kao, Zexel Corporation filed Critical Wei-Wen Kao
Publication of CA2135383A1 publication Critical patent/CA2135383A1/en
Application granted granted Critical
Publication of CA2135383C publication Critical patent/CA2135383C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C17/00—Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes
    • G01C17/38—Testing, calibrating, or compensating of compasses

Abstract

The invention provides a direction sensor and a method of calibrating a direction sensor having a relative heading sensor (14) and an absolute heading sensor (16). The method allows calibration (22) of both the relative heading sensor (14) and the absolute heading sensor (16) at the same time, by taking advantage of the known angular relationship between maxima and minima on the measurement curve of the absolute heading sensor (16). Such maxima and minima are found by rotating the sensors (12-18) through and angle of at least 360°, reading the absolute and relative heading. sensor outputs., at numerous points and comparing each successive output. The relative heading sensor output at the minimum is substracted from that at the maximum, and the difference divided by the known angle to arrive at a conversion constant for the relative heading sensor (14). The center and radii of the measurement curve of the absolute heading sensor (16) may be found by determining the maxima and minima of the curve in two perpendicular directions.
CA002135383A 1992-05-15 1993-05-12 Calibration method for a relative heading sensor Expired - Fee Related CA2135383C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US07/883,859 1992-05-15
US07/883,859 US5345382A (en) 1992-05-15 1992-05-15 Calibration method for a relative heading sensor
PCT/US1993/004460 WO1993023721A1 (en) 1992-05-15 1993-05-12 Calibration method for a relative heading sensor

Publications (2)

Publication Number Publication Date
CA2135383A1 true CA2135383A1 (en) 1993-11-25
CA2135383C CA2135383C (en) 2000-01-18

Family

ID=25383472

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002135383A Expired - Fee Related CA2135383C (en) 1992-05-15 1993-05-12 Calibration method for a relative heading sensor

Country Status (7)

Country Link
US (2) US5345382A (en)
EP (1) EP0640207B1 (en)
JP (1) JP2568988B2 (en)
AU (1) AU4244893A (en)
CA (1) CA2135383C (en)
DE (1) DE69316001D1 (en)
WO (1) WO1993023721A1 (en)

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Also Published As

Publication number Publication date
AU4244893A (en) 1993-12-13
CA2135383C (en) 2000-01-18
EP0640207B1 (en) 1997-12-29
DE69316001D1 (en) 1998-02-05
JP2568988B2 (en) 1997-01-08
US5440484A (en) 1995-08-08
EP0640207A4 (en) 1995-03-15
EP0640207A1 (en) 1995-03-01
WO1993023721A1 (en) 1993-11-25
US5345382A (en) 1994-09-06
JPH07508349A (en) 1995-09-14

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