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A Method for Uncertainty Evaluation of Measurement Results of Laser Particle Size Analyzer
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A technology of laser particle size and measurement results, applied in particle size analysis, particle and sedimentation analysis, measuring devices, etc., can solve problems such as insufficient, no unified uncertainty evaluation method, complex laser particle size analyzer, etc.
Active Publication Date: 2018-11-09
CENT FOR QUALITY SUPERVISION & INSPECTION OF ARTIFICIAL DIAMOND POWDER IN HENAN PROVINCE
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[0003] Due to the complexity of the evaluation of the uncertainty of the laser particle size analyzer, there is currently no unified uncertainty evaluation method
The usual uncertainty evaluation is to evaluate the measurement uncertainty of a point. Since the laser particle size analyzer analyzes a particle size range instead of a point, the analysis error distribution of the laser particle size analyzer is not linear. Therefore, It is not enough to evaluate only one point; in order to solve this problem, this patent proposes a three-point evaluation method for the uncertainty of the laser particle size analyzer
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[0047] Standard materials: three national particulate standard materials, the numbers are:
[0048] GB(W)120002a, quality median d 50 =3.6μm
[0049] GB(W)120004a, quality median d 50 =9.8μm
[0050] GB(W)120006a, quality median d 50 =22.4μm
[0051] Particle size analysis: According to the requirements of the instrument manual, carry out particle size analysis on the three standard substances, and take the mass median d of each standard substance respectively. 50 As a standard material rated value d i to evaluate.
[0052] Taking the evaluation results of the national particulate standard material GB(W)120002a as an example, the evaluation of each component of measurement uncertainty is as follows:
[0053] (1) Uncertainty U caused by accidental errors 1 assessment
[0088] Standard materials: three national particulate standard materials, the numbers are:
[0089] GB(W)120002a, quality median d 50 =3.6μm
[0090] GB(W)120004a, quality median d 50 =9.8μm
[0091] GB(W)120006a, quality median d 50 =22.4μm
[0092] Particle size analysis: according to the operating requirements of the laser particle size analyzer manual, carry out particle size analysis on three standard substances, and take the mass median d of each standard substance respectively 50 As a standard material rated value d i to evaluate. The analysis results are shown in Table 2. Refer to Example 1 for the specific calculation method.
[0093] The measurement and analysis result of three standard substances in table 2 embodiment 2
[0094]
[0095]
[0096] Verify implementation
[0097] Ve...
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Abstract
The invention belongs to the field of calculation, measurement and statistics, and particularly relates to a method for evaluating the uncertainty of a measuring result of a laser particle size analyzer. The method comprises the following steps that 1, three national particle standard substances different in particle size are selected and subjected to particle size analysis through the laser particle size analyzer; 2, statistics is carried out on various uncertainty components, namely, uncertainty U1 caused by an accidental error, uncertainty U2 caused by an instrument system error, uncertainty U3 introduced by the standard substances, and uncertainty U4 caused by layout of sensors in the laser particle size analyzer, influencing the measurement result; 3, uncertainty analysis is carried out. The scientific and standard method is provided for evaluation of the reliability of the measurement result of the laser particle size analyzer; laser particle size analyzers used by different users can be evaluated through the method so that the reliability of analysis results can be evaluated; meanwhile, the analysis results of different users have comparability.
Description
technical field [0001] The invention belongs to the field of calculation measurement and statistics, in particular to a method for evaluating the uncertainty of measurement results of a laser particle size analyzer. Background technique [0002] Laser particle size analyzer is widely used in particle size analysis of powder materials due to its convenient use and fast analysis speed. Due to the large number of application manufacturers of laser particle size analyzers, the manufacturers of laser particle size analyzers used by various application manufacturers are different, the specifications are different, the conditions of use are different, and the skills of operators are also different. These differences will lead to differences in the analysis results. To be reliable, it must pass the uncertainty evaluation, and judge whether it is accurate or not according to the results of the uncertainty evaluation. At the same time, GB / T27025-2008 / ISO / IEC 17025:2005 "General Requi...
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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/02
CPCG01N15/0205
Inventor 梁晓冬张晓晨王敏张钰嵩陈洁周波王本龙
Owner CENT FOR QUALITY SUPERVISION & INSPECTION OF ARTIFICIAL DIAMOND POWDER IN HENAN PROVINCE
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