Navigation instrument for roadway vehicles

Details Navigation instrument for roadway vehicles Navigation instrument for roadway vehicles

1978-12-28

1980-08-05

Atkinson, Charles E.

Boots, shoes, and leggings

364424, 364444, 364446, 235 92TC, 340161, G01P 356, G01C 2300

Patent

active

042165300

ABSTRACT:
A navigation instrument for roadway vehicles comprises a first counter for counting pulses each occurring in response to the vehicle moving a predetermined distance to detect the distance travelled from the starting point of a trip, a second counter for counting clock pulses to detect the time elapsed from the start of the vehicle. A microcomputer or digital circuitry is provided to compute on the data received from the first and second counters to derive an output data representative of the average speed of the vehicle over the distance so far travelled and to compare the computed average speed with a desired speed to detect the deviation of the actual average speed from the reference. A comparator is provided to detect when this deviation exceeds a predetermined value to generate a warning signal to alert the vehicle driver to correct the vehicle speed.

REFERENCES:
patent: 3413597 (1968-11-01), Crow
patent: 3637996 (1972-01-01), Seymour
patent: 3649818 (1972-03-01), Sylvander et al.
patent: 3748580 (1973-07-01), Stevens et al.
patent: 3780272 (1973-12-01), Rohner
patent: 3816716 (1974-06-01), DeGarmo
patent: 3836690 (1974-09-01), Purtle, Jr.
patent: 3838341 (1974-09-01), Gaines

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