Electronic tachograph

Details Electronic tachograph Electronic tachograph

1976-06-16

1978-04-04

Hartary, Joseph W.

Recorders

Combined with non-recording indicator or alarm

Speed indicator or alarm

235 92DN, 324171, 346 33D, 346121, G01D 930, G01D 5244, G01P 108

Patent

active

040830527

ABSTRACT:
An electronic tachograph for providing a chart recording of the speed of a vehicle and the distance travelled by the vehicle in relation to time includes an input transducer coupled to the vehicle drive to provide distance pulses representing the distance travelled by the vehicle, a sampling circuit which samples the distance pulses at a predetermined rate and provides pulses to a speed counter and a distance counter which responsively provide control outputs representative of the speed of the vehicle and the distance travelled by the vehicle for controlling stepping motors which effect the positioning of a speedometer shaft and the incrementing of an odometer, and for moving a speed stylus and an odometer stylus on a recording chart which is driven by a further stepping motor controlled by outputs of a time base generator which supplies timing pulses to the sampling circuit and the speed control circuits.

REFERENCES:
patent: 2982594 (1961-05-01), Riegger
patent: 3525044 (1970-08-01), Richmond
patent: 3614617 (1971-10-01), Blake
patent: 3739270 (1973-06-01), Miller
patent: 3746985 (1973-07-01), Perron
patent: 3970931 (1976-07-01), Novak

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