计量学报
計量學報
계량학보
ACTA METROLOGICA SINICA
2009年
z1期
9-13
,共5页
计量学%直线度%组合测量%双节距法%权%标准差
計量學%直線度%組閤測量%雙節距法%權%標準差
계량학%직선도%조합측량%쌍절거법%권%표준차
Metrology%Straightness accuracy%Multiple measurement%Bi -pitch%Weight%STDEV
针对直线度测量中测量数据重复性不够好、规律难以把握等问题,提出采用双节距组合测量方法.介绍在不等精度测量中权的3种确定方法:几何分析法、实验分析法、理论分析法.应用平差理论对单位权标准差、平差值权逆阵、平差值函数的权逆阵等进行计算,进行区间估计求出待测参数的估计值,由平差评定参数作为不确定度的评价指标.采用数学手段进行运算,有效地改善信息源,减少测量结果中随机误差的影响.
針對直線度測量中測量數據重複性不夠好、規律難以把握等問題,提齣採用雙節距組閤測量方法.介紹在不等精度測量中權的3種確定方法:幾何分析法、實驗分析法、理論分析法.應用平差理論對單位權標準差、平差值權逆陣、平差值函數的權逆陣等進行計算,進行區間估計求齣待測參數的估計值,由平差評定參數作為不確定度的評價指標.採用數學手段進行運算,有效地改善信息源,減少測量結果中隨機誤差的影響.
침대직선도측량중측량수거중복성불구호、규률난이파악등문제,제출채용쌍절거조합측량방법.개소재불등정도측량중권적3충학정방법:궤하분석법、실험분석법、이론분석법.응용평차이론대단위권표준차、평차치권역진、평차치함수적권역진등진행계산,진행구간고계구출대측삼수적고계치,유평차평정삼수작위불학정도적평개지표.채용수학수단진행운산,유효지개선신식원,감소측량결과중수궤오차적영향.
Aiming at a bad repeatbility of data, the discipline being difficult to grasp in the traightness measurement, the multiple measurement principle is proposed. Three definite analytical methods of the weight in unequally accurate measurement were introduced; Integral geometry; Experimental Research; Theoretical. With the adjustment, the unit weighted STD; inverse of weight matrix of adjusted value; and inverse of weight matrix of adjusted value function were calculated, the estimated value of the unknown parameters was obtained through the interval estimation, the parameter adjustment was taken as the uncertainty evaluation index. Through mathematics operations, thus effectively improve information and reduce the influence of the random error in the measurement result.
