Radiometric two-wire measuring device for measurement of a fill level
A technology for measuring instruments and measuring variables, used in material analysis using wave/particle radiation, measuring devices, radiation intensity measurement, etc., and can solve problems such as wrong connection and complexity
Active Publication Date: 2010-10-06
EHNDRESS KHAUZER GMBKH KO KG
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Problems solved by technology
This is very complicated and there is a danger that the two wire pairs will be connected incorrectly when connecting the meter
Method used
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[0050] figure 1 Schematically shows a measuring system with a radiometric measuring instrument. Radiation measuring devices are used to measure a physical measured variable and to output a measurement signal M corresponding to a measured value of the measured physical measured variable. The measuring system comprises a container 3 which can be filled with a filling substance 1 . Radiation measuring instruments are installed on the container 3 . The physical measured variable is, for example, the level of the filling substance 1 in the container 3 or the density of the filling substance 1 .
[0051] The radiation measuring instrument comprises a radioactive radiator 5 which transmits radioactive radiation through the container 3 during operation. The radiator 5 is constituted, for example, by a radiation-proof container in which a radioactive preparation (for example, a Co 60 or CS 137 preparation) is placed. The radiation-protected container has an opening through which ra...
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A radiometric measuring device is described for measurement of a physical parameter of a fill material (1) located in a container, and for output of a measured signal which corresponds to a measured value of the physical parameter. Said measuring device has a single line pair (17) via which power is supplied to the entire measuring device and via which the transmission of the measured signal occurs, and has a radioactive emitter (5) which, during operation, sends radioactive radiation through the container (3), and has a detector (7) with a scintillator (9) and a photomultiplier (11) which is used to detect a radiation intensity penetrating through the container (3)as a function of the physical parameter to be measured, and to convert said parameter into an electric output signal (N), with measuring device electronics (15) which are used to create the measured signal (M) based on the electric output signal (N) of the detector (7) and to make available said measured signal via the line pair (17), with an energy accumulator (27) powered via the line pair (17), with a controller (45) which triggers measurement phases as a function of the energy available via the line pair (17) and the energy accumulator (27), during which the measuring device measures the physical parameters, and which puts in operation the photomultiplier (11) exclusively during the measurement phases, wherein the large voltages needed for operation of the photomultiplier (11) are created during the measurement phases by means of a high voltage cascade (31).
Description
technical field [0001] The invention relates to a radiation measuring instrument having a radioactive radiator and a detector for sensing the intensity of radiation reaching the location of the detector. Background technique [0002] With radiometric measuring devices, physical variables such as the level of a filling substance in a container, exceeding or falling below a predetermined level of a filling substance in a container, or the density of a medium can be measured. [0003] Usually radiometric measuring instruments are used when conventional measuring instruments cannot be applied due to particularly difficult conditions at the measuring location. This often involves, for example, measuring locations with extremely high temperatures and pressures or chemically and / or mechanically very aggressive environmental influences, which make it impossible to use other measuring methods. [0004] In radiation measurements, radioactive radiators (eg, Co 60 or CS 137 preparation...
Claims
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IPC IPC(8): G01F23/288G01N23/08G01T1/28
CPCG01F23/288
Inventor 哈特穆特·达姆约亨·波利特西蒙·魏登布鲁赫姜明政
Owner EHNDRESS KHAUZER GMBKH KO KG