Speed detection system for automobiles and other motor-driven ob

Details Speed detection system for automobiles and other motor-driven ob Speed detection system for automobiles and other motor-driven ob

1975-12-19

1977-06-21

Waring, Alvin H.

Communications: electrical

Selective

Having indication or alarm

340 38R, 340263, 180105E, B60Q 154

Patent

active

040315100

ABSTRACT:
A system for accurately detecting and registering the speed of motor vehicles or other motor-driven objects moving between two closely spaced points of detection includes a calibrator for adjusting the system for varying spacings between points of detection within an adjustable range and for adjusting the system to compensate for errors in speed caused by the variation in reaction times of the various detector units used to start and stop the timing in speed calculation. The system calibrator includes a set of adjustable controls with associated electronic and logic circuitry to adjust the system to the spacing or "effective spacing" between points of detection without altering the inverse-ratio relationship of speed vs. time over the speed detection range of the system.
With the calibrator set to compensate for errors, the accurate speed of automobiles and other motor-driven objects moving across the two points of detection is calculated from time of travel by means of a simple electronic calculator, and the speed of each vehicle is displayed in miles per hour or kilometers per hour on a light display until the next following vehicle crosses the sensors, whereupon the speed of that vehicle is shown. The speed is also output in digital form for use by remote equipment.

REFERENCES:
patent: 2877454 (1959-03-01), Zedlar et al.
patent: 2927836 (1960-03-01), Shore

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