Method for determining middle material level curve of continuous passive nuclear material level gage
A material level meter and continuous technology, which is applied in the field of determining the material level curve in the continuous passive nuclear material level meter, can solve the problem of not being able to know the material level in time and accurately, and achieve the effect of improving reliability and increasing selectivity.
Active Publication Date: 2012-10-17
郭云昌 +1
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The premise of this method is that the material level is known and the material level at each moment is known, but in actual situations, this method is difficult to implement for three reasons: first, the material level cannot be known accurately in time; second, in order to obtain a comparison Accurate gamma-ray intensity values require a certain response time; third, due to the randomness of gamma-rays, the actual measured gamma-ray intensity values are within a range
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[0031] The present invention will be further described with reference to the accompanying drawings, and the method can be realized by those skilled in the art.
[0032] The method of the invention is proposed to be suitable for the continuous material level meter, and it is hoped that the accurate material level signal can be continuously output with the change of the material height. The passive nuclear level meter measures the gamma ray intensity within the determined response time, determines the relationship between the measured gamma ray intensity and the material level, and outputs the measured material according to the actual measured gamma ray intensity value. bit.
[0033] The realization of the direct method proposed by the present invention should be combined with other methods to first determine the material level. The method is not limited to the moving method and the knocking method. According to the measurement accuracy requirements, the gamma ray intensity rang...
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The invention relates to the technical field of passive nuclear material level measurement, in particular to a method for determining a middle material level curve of a continuous passive nuclear material level gage. The method adopts a direct method and comprises the following steps that firstly, the continuous passive nuclear material level gage is arranged in a selected position; then, the material level is determined in other measurement modes, and the intensity of gamma rays corresponding to different material levels are measured in different material levels according to the measurement precision requirement; and finally, the material levels are determined according to the practically measured gamma ray intensity, and a reckoning method or a reference method can also be adopted for replacing the direct method. The method has the advantages that the blanks in the prior art are filled, the method applicable to the continuous passive nuclear material level gage for determining the material level and gamma ray intensity relationship is provided, firm foundation is provided for accurately determining the material level, the method capable of realizing the mutual replacement among the direct method, the fitting prediction method and the reference method according to the practical measurement conditions is provided, the selectivity during the user measurement according to the practical measurement conditions is improved, and the method can also be used as a checking method for improving the data reliability.
Description
[Technical field] [0001] The invention relates to the technical field of passive nuclear material level measurement, in particular to a method for determining a material level curve in a continuous passive nuclear material level meter. [Background technique] [0002] In the chemical, metallurgical, coal, electric power and other industries, in the process of conveying materials, it is often necessary to measure the material level in the hopper and silo. [0003] There are two main methods for measuring the material level by using gamma rays: one is the traditional nuclear material level meter with radioactive source, such as an automatic material level control device disclosed in the domestic patent CN202230393. A symmetrical gamma ray column measures the material level in the material level bin; the other is a non-radioactive nuclear level meter that uses the natural gamma rays of the material to be measured and the environment to measure the material level without a radioa...
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IPC IPC(8): G01F23/288
CPCG01F23/288G01F25/20
Inventor 郭云昌朱敏娟
Owner 郭云昌