Remote indicating solid state magnetic sensor
US4030204A · kind A · utility
Inventor
Key dates
| Filing date | Mar 18, 1974 |
| Grant date | Jun 21, 1977 |
| Priority date | — |
| Expiry date | Mar 18, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C17/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A solid state magnetic sensor system for indicating the direction of an applied magnetic field and more specifically as a compass system for use with automobiles or the like. The system consists of a dashboard mounted readout unit which receives signals provided thereto from a remotely located solid state magnetic bearing sensor, the latter being responsive to the earth's magnetic field. The solid state magnetic bearing sensor described herein, includes a pair of Hall effect semiconductors and ancillary electronic circuits. Two ancillary circuit types are described. One circuit is designed to output digital codes indicative of magnetic heading; the other circuit is designed to output two currents which are indicative of sine and cosine components of magnetic heading. The circuit designed to output digital codes includes sinusoidal waveform generators, a binary counter, a differential comparator amplifier and digital latch and decoding circuits. The circuit designed to output currents indicative of sine and cosine components of magnetic heading are comprised of a pair of linear differential buffer amplifiers. The dashboard mounted readout unit designed to accept digital codes may be…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.