Crossed coil meter driving device having a plurality of input parameters
US5051688A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Dec 11, 1990 |
| Grant date | Sep 24, 1991 |
| Priority date | — |
| Expiry date | Dec 11, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R7/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A meter driving device for indicating angular positions corresponding to input values. The device includes a memory for storing previously given input values, angular directions corresponding to the input values, and coefficients representative of the grades of change in angular direction depending on the change between adjacent two input values, as parameters. Based on these parameters and the frequency of input pulse signal giving the input values, the angular direction corresponding thereto is calculated. The angular direction signal receives PWM process and then supplies to a pair of crossed exciting coils via a driver. During a predetermined time period from the turning ON and OFF of the power source, the transference of the angular direction signals to the driver is shut out by logic gates, thereby inhibiting malfunctional meter indication.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.