Proving safe operation

Details Proving safe operation Proving safe operation

1986-12-15

1989-01-24

Kemeny, Emanuel S.

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307 3, 330 2, 246 40, 375 10, B61L 1102

Patent

active

048005070

ABSTRACT:
A method of proving safe operation of a complex electronic circuit, and apparatus for carrying out the method, in which a proving signal having known characteristics is superimposed on an input to the circuit and the output is searched for said characteristics. An example involves the use of a microprocessor arranged to evaluate a fast Fourier transform algorithm on the coded carrier signal of a railway automatic train protection system or of railway a.c. track circuit arrangement.

REFERENCES:
patent: 3710373 (1973-01-01), Watanabe et al.
patent: 4301404 (1981-11-01), Ley
patent: 4361904 (1982-11-01), Matsumura

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