Measuring and testing – Vibration – Resonance – frequency – or amplitude study
Patent
1977-06-21
1979-09-04
Kreitman, Stephen A.
Measuring and testing
Vibration
Resonance, frequency, or amplitude study
G01N 2900
Patent
active
041663934
ABSTRACT:
Process and apparatus for a non-destructive continuous automatic quality control system monitoring a stoneware pipe and like objects, where the pipe is excited with a vibration generator up to a resonance frequency vibration, this vibration being measured with a vibration receiver, thereupon being registered and compared with values of a calibration curve. During the excitation and measuring, the pipe is borne on two turn crosses coated with rubber. The resonance frequency vibration is measured at the maximum of at least one antinode of vibration. The pipe is transported by a conveyor belt having rollers. A photoelectric pipe scanning system measures the nominal diameter of the pipe for preadjusting the position of the vibration receiver.
REFERENCES:
patent: 1543124 (1925-06-01), Ricker
Lindner Hans A.
Thoma Hans-Jurgen
Cremer & Breuer Keramische Betriebe GmbH
Kreitman Stephen A.
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