Signal decision system

Details Signal decision system Signal decision system

1977-04-14

1979-08-21

Thesz, Joseph M.

Registers

Platform operated

Platform actuated traffic counters

235 92TF, 235 92PK, 235 92R, G06M 302

Patent

active

041654587

ABSTRACT:
An electrical signal originating from an abnormal sound is passed through a bandpass filter and compared with a reference signal by a comparator. When the electrical signal is not less than the reference signal, the comparator produces a pulse. A counter counts the pulses from the comparator and causes a display device to display the presence of the abnormal sound when its count exceeds a predetermined value within a predetermined time interval.

REFERENCES:
patent: 3439358 (1969-04-01), Salmons
patent: 3558004 (1971-01-01), Boyd et al.
patent: 3793512 (1974-02-01), Lorenzen
patent: 3881353 (1975-05-01), Fathauer
patent: 4000398 (1976-12-01), Conner

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