Sand-measuring ionization chamber

An ionization chamber and sand measurement technology, applied in the field of sand measurement ionization chamber, can solve the problems of low detection efficiency and strong absorption of low-energy γ-ray sources, and achieve the effect of small statistical error, good long-term signal stability, and reduction of natural discharge.

Inactive Publication Date: 2010-02-10
YELLOW RIVER INST OF HYDRAULIC RES YELLOW RIVER CONSERVANCY COMMISSION
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Problems solved by technology

[0004] The current ionization chamber has been widely used in industry, but the ionization chamber used in industry uses stainless steel window, and stainless steel absorbs the low-energy γ-ray source strongly, resulting in low detection efficiency, so it is not used in the measurement of sediment concentration. fields are applied

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  • Sand-measuring ionization chamber

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Embodiment Construction

[0018] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0019] Depend on figure 1 It can be seen that the interior of the sand measuring ionization chamber is divided into two independent parts, the upper part is the upper end pipe 6, and the lower part is the lower end pipe 8; the upper end pipe 6 has a flange ring 5, and the flange ring 5 is connected with the end cover 4 Sealed connection, the end cover 4 is equipped with a pressure sensor 3; the upper end tube 6 and the lower end tube 8 are connected by a flange 7 and separated into two independent parts, and the upper end tube 6 is equipped with an amplifier board 14 and a high voltage power supply for a high voltage power supply frame 13, temperature sensor 15; the lower end tube 8 is equipped with an electrode cylinder 9 and filled with high-pressure inert gas, the top of the lower end tube 8 is equipped with a stainless steel window cap 11 and an aluminum ...

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Abstract

The invention discloses a sand-measuring ionization chamber which comprises an upper end tube and a lower end tube connected by a flange and is separated into two separate parts. The upper end tube isinternally provided with an amplifier plate, a high-voltage power source frame and a temperature sensor, and a high-voltage power source is mounted in the high-voltage power source frame; the lower end tube is internally provided with an electrode container and filled with high-voltage inert gas; the top end of the lower end tube is provided with an aluminum window; a ceramic insulator is weldedon the flange; a lead tube on the electrode container is connected with a high-voltage electrode on the high-voltage power source frame by the ceramic insulator; the other electrode on the high-voltage power source frame is connected with the input end of an amplifying circuit on the amplifier plate; the output end of the amplifying circuit on the amplifier plate is connected with a cable; and theother end of the cable is externally connected with a computer. The sand-measuring ionization chamber improves the efficiency of a 241 Am gamma radioactive source by more than one magnitude, uses theradioactive source with great activity, little Statistical error and good stability, has strong harsh environment toleration, good long-term signal stability, wide measuring range and low failure rate, thereby being suitable for the online measurement of the sediment concentration of underwater silt.

Description

Technical field: [0001] The invention relates to a hydrological device, in particular to a sand measuring ionization chamber which is suitable for underwater on-line measurement of sand content and is invented according to the principle of gamma ray low energy and different absorbance of water and sand. Background technique: [0002] Traditional isotope sand measurement uses scintillation counters and proportional counters as detectors. The output of these detectors is counts, with large statistical errors and poor stability. Although they have been studied for many years, they have not yet reached the practical stage. [0003] The ionization chamber is an ionization chamber with stainless steel windows filled with inert gas. When the radiation enters the ionization chamber, the gas is ionized to generate positive and negative ion pairs. The ion pairs drift to the positive and negative electrodes under the action of high voltage to form an ionization current. The size of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/12
Inventor 李黎李景修高航杨勇田凯黄建通
Owner YELLOW RIVER INST OF HYDRAULIC RES YELLOW RIVER CONSERVANCY COMMISSION
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