Test circuit for periodically monitoring the integrity of an ant

Details Test circuit for periodically monitoring the integrity of an ant Test circuit for periodically monitoring the integrity of an ant

1977-10-05

1978-09-26

Kunin, Stephen G.

Fluid-pressure and analogous brake systems

Pipeless valves

340 52B, B60T 802

Patent

active

041164946

ABSTRACT:
A test circuit periodically emits a test control signal as long as the vehicle speed exceeds a preselected value and there is no antiskid brake control action. The test signal causes a frequency control circuit to decrease the frequency of a sensor signal that indicates the rotating velocity of a wheel of the vehicle, thereby simulating a wheel deceleration sufficient to obtain wheel behavior signals from the antiskid brake control system. A logic sensing circuit then reacts to these wheel behavior signals to suppress production of an error signal, which otherwise occurs after a predetermined delay period to indicate a defect in the antiskid brake control system.

REFERENCES:
patent: 3620577 (1971-11-01), Neisch et al.
patent: 3818433 (1974-06-01), Okamoto et al.
patent: 3866980 (1975-02-01), Eisele et al.

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