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EP0272078A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Apparatus for display travel path

Assignee: Honda Motor Co Ltd
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Filing: 1987-12-15
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Granted: —
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Expires: 2007-12-15
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Abstract

Abstract An apparatus for displaying a travel path of a running body in which a direction detector (2) includes a geomagnetism sensor (21) as well as a rate-type sensor (22), such as a gyroscope or a gas rate sensor for detecting changes in the yawing direction of the moving body. In the apparatus disclosed, a difference angle between the directions detected by the rate-type sensor and the geomagnetism sensor is calculated and is temporarily stored when power to the apparatus is temporarily switched off during operation of the running path displaying apparatus. Then, for a predetermined time, a declination of the direction detected by the geomagnetism sensor is corrected, depending upon the stored difference angle, when the power source is switched on again.

Inventors

  • 👤 Akira Iihoshi
  • 👤 Yukinobu Nakamura
  • 👤 Shinichiro Yasui

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-24 09:45
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/02; G05D1/021; G05D1/0259; G01; G01C; G01C21/00; G01C21/26; G01C21/28; G01D; G01D7/00; G05D1/0268; G05D1/0274; G05D1/027; G05D1/0272

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 169 words
An apparatus for displaying a travel path of a running body, including: a distance detector (1), for detecting a distance of travel of the running body; and a direction detector (2), for detecting a running direction, wherein a current location of the running body in a two-dimensional coordinate system is successively computed from the detections effected by the distance and direction detectors, and the location thus computed is displayed on a display screen (7), characterised in that the direction detector (2) comprises: a geomagnetism sensor (2) and a rate-type sensor (22), and in that the apparatus further comprises: means (3) for calculating a difference angle, between a running direction detected by the rate-type sensor and a running direction detected by the geomagnetism sensor, and storing the calculated difference angle at a time when power to the apparatus is switched off, and for effecting correction of a running direction detected by the geomagnetism sensor when power to the apparatus is switched on, on the basis of the stored difference angle.
Claim 2
Independent Claim 169 words
An apparatus for displaying a travel path of a running body, including: a distance detector (1), for detecting a distance of travel of the running body; and a direction detector (2), for detecting a running direction, wherein a current location of the running body in a two-dimensional coordinate system is successively computed from the detections effected by the distance and direction detectors, and the location thus computed is displayed on a display screen (7), characterised in that the direction detector (2) comprises: a geomagnetism sensor (2) and a rate-type sensor (22), and in that the apparatus further comprises: means (3) for calculating a difference angle, between a running direction detected by the rate-type sensor and a running direction detected by the geomagnetism sensor, and storing the calculated difference angle at a time when power to the apparatus is switched off, and for effecting correction of a running direction detected by the geomagnetism sensor when power to the apparatus is switched on, on the basis of the stored difference angle.
Claim 3
Dependent Claim 69 words
An apparatus as claimed in claim 1, wherein, when power to the apparatus is switched on, the location of the running body is computed, for a predetermined time, using the running direction detected by the geomagnetism sensor, corrected on the basis of the stored difference angle, and wherein the location of the running body is calculated, after the predetermined time, using the running direction detected by the rate-type sensor.

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