Vehicle monitoring system
US3964302A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1974 |
| Grant date | Jun 22, 1976 |
| Priority date | — |
| Expiry date | Nov 27, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08C15/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Electrical signals representing analog values of variables to be measured are sampled and multiplexed onto a common conductor. When the analog values are generated by transducers having a logarithmic characteristic, the signals are linearized by a log amplifier prior to being multiplexed. The ranges of the analog signals are made similar to facilitate use of a common display. A single analog-to-digital converter generates digital outputs representing the amplitudes of the respective analog samples and the digital outputs control display logic for operating the common display. A sequence timer controls operation of the multiplexer, analog-to-digital converter, display logic, and the display itself. Facility for manual override to display selectively any of the variables is provided, as well as an alarm indicator for generating an audible or visual alarm signal in the event any variable exceeds (or drops below) a predetermined reference level. An electroluminescent seven-segment display and quantised analog displays are described. The system is described with particular reference to an automotive display system for monitoring, e.g. fuel level, oil pressure, coolant temperature, and b…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.