Design for coal-thickness-sensing instrument features independent hydropneumatic suspension of radiation source and detector. Monitor uses source and detector which are independently mounted, to follow contour of coal surface more closely and to eliminate errors caused by variations in airgap along radiation path. Device may help to bring fully-automated coal mining closer to reality.
Improved nucleonic coal-thickness monitor
NASA Tech Briefs ; 3 , 3
1979-01-01
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Englisch
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