Patent ID: 7787593
Filing Date: 2010-08-31
Classification: G01N,G21K,H05G

Abstract:
1. An online analysis device, said device comprising: a feed conveyor for supplying material to be analyzed; an X-ray tube configured to generate an X-ray beam directed toward a measuring region on the feed conveyor; a control unit for actuating the X-ray tube; an X-ray detector for measuring X-ray radiation that either interacts with the material, or is emitted by the material; a material detector, which is configured to detect whether material is present in the measuring region or is supplied thereto and to generate a signal dependent thereon, wherein the material detector is connected to the control unit and the control unit actuates the X-ray tube in one of a first and a second operating state, in dependence on the signal from the material detector, wherein an anode current of the X-ray tube in each of the first and second operating states is respectively adjusted such that a heating current of the X-ray tube has a same order of magnitude for both the first and the second operating states, wherein both the acceleration voltage and the anode current are reduced in the second operating state with respect to the first operating state, and wherein an acceleration voltage in the first operating state ranges from 5 kV to 100 kV and in the second operating state is less than 10 kV.