Multiple-meter driving apparatus
US5446655A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1995 |
| Grant date | Aug 29, 1995 |
| Priority date | — |
| Expiry date | Feb 21, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D21/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A multiple-meter driving system intends to cut down on the amount of space needed and to reduce the manufacturing cost by providing a single controller including a processing circuit, the controller being adapted collectively to drive a plurality of meters mounted in a vehicle such as motorcar or the like. Pulse signals each having a frequency corresponding to an input signal from a vehicle speed sensor or the like in the vehicle are counted with respect to their period T by a plurality of counters. The counts are then supplied to the controller. DC signals each corresponding to an input from a fuel sensor or the like are converted into digital signals by an A/D converter, which are also supplied to the controller. The processing circuit in the controller time-shares these input signals so as to perform operations of 1/T, sine and cosine. The results are again supplied back to the controller which in turn directs them to pulse width modulating circuits corresponding to the respective meters to be indicated. Since the respective meters are driven on a time-sharing basis, the single controller including the processing circuit can drive the meters collectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.