Online analysis device
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United States of America Patent
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Aug 31, 2010
Grant Date -
Dec 6, 2007
app pub date -
Mar 16, 2005
filing date -
Mar 16, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
An online analysis device, including a feed conveyor for supplying material, an X-ray tube, having an X-ray beam directed toward a measuring range on a feed conveyor, a control unit for actuating the X-ray tube, an X-ray detector that measures the radiation that interacts with, or is emitted by, the material, and a material detector for detecting material in the measuring range and generating a signal dependent thereon. To omit a mechanical shutter without reducing the service life of the tube, the material detector is connected to the control device, which controls the X-ray tube in dependence on the signal from the material detector in one of two states, where the heating current for the X-ray tube has the same order of magnitude in both states and the acceleration voltage in the first state is 5 kV to 100 kV and in the second state is less than 10 kV.
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