Switch status monitoring system, single wire bus, smart sensor a

Details Switch status monitoring system, single wire bus, smart sensor a Switch status monitoring system, single wire bus, smart sensor a

1986-12-22

1987-06-30

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Vehicle mounted systems

Automobile

307 38, 340 52F, 370 85, B60Q 100, B62D 4500

Patent

active

046773088

ABSTRACT:
Continuous status monitoring of a plurality of switches and smart sensors associated with the switches, wherein each sensor is connected to a separate single point on a single-wire bus is affected by a smart sensor multiplex arrangement. The multiplex arrangement employs a microcomputer and a driver and receiver circuit for developing a particular pulse train waveform, which is placed on the bus to provide power and control voltage signals to the plurality of smart sensors. The smart sensors contain circuits that respond to the waveform in a manner that causes each smart sensor to send current signals back over the single wire bus to the driver and receiver circuit and the microcomputer during designated repetitive and sequential time slots. The driver and receiver circuit receives, interprets and converts the current signals into voltage signals used by the microcomputer for establishing a history of the status of the bus, the sensors and the switches. The microcomputer supplies continuous and updated information to a display system indicative of the status of each sensor and its associated switch.

REFERENCES:
patent: 4232231 (1980-11-01), Reed
patent: 4463341 (1984-07-01), Iwasaki
patent: 4574266 (1986-03-01), Valentine
patent: 4584487 (1986-04-01), Hesse et al.
patent: 4639609 (1987-01-01), Floyd et al.

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