CAJ | 학술논문

电子分析天平的结构复杂，且对温度影响敏感，而温度漂移的自动补偿是制约国内外天平行业发展的技术难关。本文依据电磁力平衡传感器的工作机理，分析与电子分析天平称量结果密切相关的各关键元件温度特性，采用多点测温，建立多传感器加权融合温度漂移补偿模型，并利用最小二乘法确定融合模型系数，实现了电子分析天平的温度漂移自动补偿。检验结果表明，采用本文研究的补偿算法，在10～30℃范围内，量程220 g、分辨力0．1 mg的电子分析天平全量程示值误差绝对值不大于0．3 mg，优于国家标准《GB／T 26497－2011电子天平》规定的I级天平温度漂移对示值误差的影响指标。
전자분석천평적결구복잡，차대온도영향민감，이온도표이적자동보상시제약국내외천평행업발전적기술난관。본문의거전자력평형전감기적공작궤리，분석여전자분석천평칭량결과밀절상관적각관건원건온도특성，채용다점측온，건립다전감기가권융합온도표이보상모형，병이용최소이승법학정융합모형계수，실현료전자분석천평적온도표이자동보상。검험결과표명，채용본문연구적보상산법，재10～30℃범위내，량정220 g、분변력0．1 mg적전자분석천평전량정시치오차절대치불대우0．3 mg，우우국가표준《GB／T 26497－2011전자천평》규정적I급천평온도표이대시치오차적영향지표。
Electronic analytical balance has complex structure and is sensitive to temperature effect, while automat-ic temperature drift compensation is a technical difficulty to restrict the development of electronic balance in the do-mestic and overseas.In this paper, the characteristics of each key element closely related to weighting results are analyzed according to the working principle of electromagnetic force balance sensor.By using the multi-point tem-perature measurement, a temperature drift compensation model based on multi-sensor weighted fusion is estab-lished.The model’ s coefficients are solved by least squares method, and the automatic temperature drift compensa-tion is realized automatically.By using the proposed method, the test results demonstrate that the absolute value of the indication error of electronic analytical balance with the range of 220 g is not great than 0 .3 milligram in the range 10~30℃, which is superior to the indication error index specified by Chinese National Standard “GB/T 26497-2011 Electronic balance” for the 1st class balance.