Method and a device for ascertaining the degree of compaction of

Details Method and a device for ascertaining the degree of compaction of Method and a device for ascertaining the degree of compaction of

1977-03-02

1978-08-01

Gill, James J.

Measuring and testing

Vibration

Hardness or compliance

73579, 404133, G01M 700, E02D 306

Patent

active

041035542

ABSTRACT:
A device for ascertaining the degree of compaction of beds of material with a vibratory compaction device as a function of the vibratory amplitude of the motion of the compaction device at selected frequencies is described. The amplitude of vibratory motion of a compaction device is measured at a fundamental frequency and at least the second harmonic of the fundamental frequency and a ratio of the measured signals is computed. The ratio or quotient of the two signals provides a representation of the degree of compaction of the material being compressed by the compaction device. The ratio or quotient may be utilized either as a direct indication to an operator of the degree of compaction or as a control signal in an automated servo control compaction system.

REFERENCES:
patent: 4040292 (1977-08-01), Theurner

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