Method of determining the driver's sufficient alertness to drive

Details Method of determining the driver's sufficient alertness to drive Method of determining the driver's sufficient alertness to drive

1975-03-19

1977-01-25

Swann, III, Glen R.

Communications: electrical

Systems

Call station

180 99, G08B 2100

Patent

active

040053989

ABSTRACT:
A constant voltage developed by a constant voltage generator is integrated, and the integrated voltage is applied to a voltage comparator. A standard voltage is applied to a voltage controller, which includes a sensor responsive to vehicle operating conditions, to control the level of the standard voltage to indicate the degree of driver alertness necessitated by the vehicle operatingconditions. The controlled standard voltage is also applied to the voltage comparator, and when the integrated voltage exceeds the controlled standard voltage the comparator develops a warning signal output. A warning device receives the warning signal and is thereby rendered operative in order to alert the driver.

REFERENCES:
patent: 3186508 (1965-06-01), Lamont
patent: 3222639 (1965-12-01), Kayser, Jr.
patent: 3611344 (1971-10-01), Couper
patent: 3654599 (1972-04-01), Sepper
patent: 3811116 (1974-05-01), Takeuchi et al.
patent: 3877541 (1975-04-01), Takeuchi et al.

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