Vehicle driver alertness apparatus monitoring steering wheel osc

Details Vehicle driver alertness apparatus monitoring steering wheel osc Vehicle driver alertness apparatus monitoring steering wheel osc

1976-02-05

1977-04-12

Swann, III, Glen R.

Communications: electrical

Systems

Call station

180 99, 340 52R, G08B 2100, B60Q 500

Patent

active

040178439

ABSTRACT:
Steering wheel oscillations are detected and a first signal generated for each predetermined number of oscillations. A ramp generator is reset by each first signal and, if its output reaches a preset value, a comparator generates a second signal to indicate excessive time between first signals. An up-down counter is counted up by each first signal and down by each second signal. A comparator compares the contents of the counter with a present number and generates a third signal when the number in the counter falls below the present number. A timer consisting of an integrator and comparator generates a forth signal when the third signal has been present for a predetermined time. The forth signal causes an alarm device to alert the driver.

REFERENCES:
patent: 3654599 (1972-04-01), Sepper
patent: 3678494 (1972-07-01), Setser
patent: 3794969 (1974-02-01), Klopfenstein et al.
patent: 3877541 (1975-04-01), Takeuchi et al.

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