Coal seam sensor

Details Coal seam sensor Coal seam sensor

1978-03-01

1979-03-13

Myracle, Jerry W.

Measuring and testing

Vibration

Resonance, frequency, or amplitude study

299 1, G01N 2900

Patent

active

041435524

ABSTRACT:
The frequency response of the cutting tool of a coal mining machine is monitored at a resonant frequency of the cutting tool, using a vibration transducer mounted on a non-rotating support arm, to detect the difference between coal and rock or other enclosing material. The horizon control sensor maintains the mining machine within the undulating coal seam.

REFERENCES:
patent: 3150519 (1964-09-01), Heimaster et al.
patent: 3793627 (1974-02-01), Darrel et al.

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