Measuring and testing – Internal combustion engine or related engine system or... – Compression
Patent
1982-07-22
1984-06-05
Myracle, Jerry W.
Measuring and testing
Internal combustion engine or related engine system or...
Compression
73660, G01M 1500
Patent
active
044520743
ABSTRACT:
Disclosed is a method comprising the steps of applying ultrasonic mechanical oscillations across the body of a mechanism being monitored to the chosen moving element of the mechanism, receiving and converting into an electrical signal the ultrasonic oscillations received from the chosen element and modulated as a consequence of the motion performed by the element, isolating from the electrical signal a modulated carrier frequency equal to the frequency of the oscillation being applied, detecting the isolated frequency so as to obtain a low-frequency intelligence signal characterizing the motion performed by the chosen element, and determining the performance characteristics of the mechanism being monitored on the basis of the measured spectral-time parameters of the intelligence signal. Disclosed is an apparatus for practicing the foregoing method comprising an electrical generator connected to a transmitting electromechanical converter arranged on the body of the mechanism being monitored, upon which also arranged is a receiving electromechanical converter connected to a band-pass filter, a detector, a low-frequency amplifier and a meter of the amplitude-time parameters of the intelligence signal connected in series.
REFERENCES:
patent: 4213346 (1980-07-01), Polovnikov et al.
patent: 4354380 (1980-10-01), Murata
Ermolov, I. R. S. et al., Electromeasuring Facilities for Diagnosis of Machines and Mechanisms, Leningrad, Energia Publishing House, 1979, pp. 86-87.
Pavlov, B. V., Acoustical Diagnosis of Mechanisms, Moscow, Mashinostroenie Publishing House, 1971, pp. 169-171 and 180-181.
Boglov Alexandr M.
Bratsky Fedor F.
Geraschenko Leonid I.
Konstantinov Vladimir A.
Lutsky Vasily I.
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