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Pellet diameter measuring method

A pellet and caliper technology, applied in the field of measurement, can solve problems such as repeatability errors, and achieve the effect of improving measurement accuracy and breaking through measurement accuracy

Inactive Publication Date: 2017-02-22
CNNC JIANZHONG NUCLEAR FUEL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing pellet diameter measurement method only achieves the measurement accuracy, and there is still a certain distance from the repeatability error

Method used

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  • Pellet diameter measuring method

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Experimental program
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Embodiment 1

[0029] A method for measuring the diameter of nuclear fuel pellets, such as figure 1 shown, including the following steps:

[0030] S1, choose two first standard pellets and second standard pellets calibrated by the appraisal department, and their standard diameters are a 0 , b 0 , a 0 0 ;

[0031] Measure the diameters of the first standard pellet and the second standard pellet to obtain the measured diameters as a 1 , b 1 ;

[0032] Using the measured diameter as an independent variable and the standard diameter as a dependent variable, fitting the functional relationship f of the standard diameter relative to the measured diameter;

[0033] S2, measure the first pellet to be tested, and obtain its initial measurement diameter as A 1 ;

[0034] S3, measuring the diameter A of the first pellet to be tested 1 Substituting the functional relationship f to obtain the final diameter A of the first pellet to be tested r .

[0035] In this embodiment, a high-precision CC...

Embodiment 2

[0040] The difference between embodiment 2 and embodiment 1 is that a method for measuring the diameter of pellets is provided, using more than 3 standard pellets, and using 3 standard pellets as an example to illustrate the content of the specific embodiment, using more than 3 standard pellets The content of the embodiment of the block is substantially consistent with the embodiment using 3 standard core blocks.

[0041] A nuclear fuel pellet diameter measuring method, comprising the following steps:

[0042] S1, select three first standard pellets, second standard pellets and third standard pellets calibrated by the appraisal department, and their standard diameters are respectively a 0 , b 0 , c 0 , a 0 0 0 ;

[0043] Measure the diameters of the first standard pellet, the second standard pellet and the third standard pellet, and obtain the measured diameters as a 1 , b 1 , c 1 ;

[0044] Using the measured diameter as an independent variable and the standard diamet...

Embodiment 3

[0050] Implementation 3 provides a method for effectively measuring the diameter of pellets on the basis of embodiments 1 and 2,

[0051] S1, select at least 2 calibrated standard pellets, the standard diameters of which are different from each other;

[0052] Measuring the diameter of the standard pellet to obtain its measured diameter;

[0053] Using the measured diameter as an independent variable and the standard diameter as a dependent variable, fitting the functional relationship f of the standard diameter relative to the measured diameter;

[0054] S2, measuring the pellet to be tested to obtain its initial diameter;

[0055] S3. Substituting the measured diameter of the pellet to be tested into the functional relationship f to obtain a final measured diameter of the pellet to be tested.

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Abstract

The invention relates to the field of measurement and particularly relates to a nuclear fuel pellet diameter measuring method. The nuclear fuel pellet diameter measuring method comprises the following steps: S1, selecting at least two calibrated standard pellets, wherein standard diameters of the standard pellets are different from each other; measuring the diameters of the standard pellets to obtain measured diameters; taking the measured diameters as independent variables, taking the standard diameters as dependent variables, fitting a function relationship f of the standard diameters relative to the measured diameters; S2, measuring pellets to be measured to obtain initial measured diameters; and S3, substituting the measured diameters of the pellets to be measured into the function relationship f to obtain final measured diameters of the pellets to be measured. The pellet measuring method achieves the beneficial effects that the self measurement accuracy of a measurement system is broken through, and the actual measurement accuracy is approximate to repeatability error.

Description

technical field [0001] The invention relates to the field of measurement, in particular to a method for measuring the diameter of nuclear fuel pellets. Background technique [0002] Pellet diameter measurement is a precision measurement, usually using a high-precision CCD micrometer. The CCD micrometer is divided into two parts: a transmitter and a receiver. The transmitter includes an LED light source and a parallel light lens group, and the receiver includes a telecentric optical system and a linear array CCD image sensor. The parallel light emitted by the transmitter enters the receiver after being partially blocked by the core block to be tested, and is imaged on the line array CCD image sensor. The CCD image sensor will receive the light and dark images, and detect the edge distance of the light and dark areas on the image. Get the pellet diameter. The parallel light lens group in the transmitter is used to convert the light emitted by the LED into parallel light, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/08
CPCG01B11/08
Inventor 黄海唐臻宇黄萍黄锐冷铁岩秦志平
Owner CNNC JIANZHONG NUCLEAR FUEL