Gauge for determining the percentage by weight of moisture contained in a bulk material transported on a moving conveyor
Patent
·
OSTI ID:4367271
A moisture gauge is described including a radiation source for irradiating with fast neutrons and gamma radiation a bulk substance having moisture contained therein, an analog detector responsive to gamma radiation which has been interacted with a predetermined fractional cross-sectional area of the bulk substance to produce a first electrical signal of an analog-type, the amplitude of which is correlated to the instantaneous total weight of the bulk substance including contained moisture, and a pulse-type detector which is responsive to slow neutrons generated by the interaction of fast neutrons and hydrogen atoms of the contained moisture in said predetermined fractional cross- sectional area to produce a second electrical signal of a pulse-type, the pulse rate of which is correlated to the weight of the moisture contained in the bulk substance. The electrical signals generated by the pulse-type slow neutron detector and the analog-type gamma detector are separately accumulated for predetermined intervals, with the slow neutron and gamma accumulating intervals being both equal and synchronized and preferably in the range of 20--80 seconds. An electrical circuit divides the successive moisture weight accumulation signals and the successive total weight accumulation signals to provide successive outputs correlated to the percentage by weight of moisture contained in the bulk substance passing through the gauge during the successive accumulation intervals. (6 Claims 19 Drawing figures) (Official Gazette)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-29-007826
- Assignee:
- to Ohmart Corp.
- Patent Number(s):
- US 3761712
- OSTI ID:
- 4367271
- Country of Publication:
- United States
- Language:
- English
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