Heading detecting apparatus
US4523386A · kind A · utility
1Cited by
1References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 24, 1981 |
| Grant date | Jun 18, 1985 |
| Priority date | — |
| Expiry date | Dec 24, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C17/38
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A heading detecting apparatus of the type which is installed in a roof of a vehicle including a magnetic member (a steel body) capable of having a remanence and includes a heading sensor positioned near the magnetic member, whereby the apparatus detects the terrestrial magnetism and thereby detects the forward heading of the moving objects the apparatus includes a permeability member positioned between the magnetic member and the heading sensor so as to reduce the effect of the remanence of the magnetic member on the detection of the terrestrial magnetism by the heading sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.