40台工频电场测量仪器实验室间比对研究

发布时间：2018-04-22 23:09

本文选题：工频电场 + 测量仪器　；参考：《环境与职业医学》2017年07期

【摘要】：[目的]通过工频电场测量仪器的实验室间比对,了解广东省职业卫生技术服务机构工频电场测量仪器的配置、校准情况及性能。[方法]以广东省40家职业卫生技术服务机构(以下简称"参比机构")的40台工频电场测量仪器(以下简称"参比仪器")为研究对象,查验其校准证书。以某变压器为标准源,组织方用同一台仪器在距离其1.0 m处进行不同时间段的检测,采用单因素方差分析法检验其稳定性。在稳定性检验后,由参比机构测量人员持参比仪器在距离标准源1.5 m和2.0 m的测量点进行比对检测,采用基于四分位数稳健统计技术的z比分数对测量结果进行分析。[结果]标准源稳定性检验中,第1天下午、第2天上午、第2天下午共3个时间段电场强度比较,差异无统计学意义[(209.52±0.38)、(209.96±0.51)和(209.74±0.60)V/m,P0.05],表明标准源可满足实验室间比对的稳定性要求。40台参比仪器中有1台参比仪器未送检,2台参比仪器校准证书已过期,1台参比仪器校准结果超出允差范围。40台参比仪器实验室间z比分数(zB)为-1.16~13.41,实验室内z比分数(zW)为-1.29~25.26;其中2台参比仪器|zB|及|zW|均3.00,1台参比仪器|zB|3.00,为离群结果 ;4台参比仪器|zB|或|zW|2.00,为有问题结果。根据比对结果,判定3台参比仪器不合格。[结论]以变压器为标准源进行工频电场测量仪器的实验室间比对具有可行性,目前广东省职业卫生技术服务机构配置的工频电场测量仪器在使用上仍存在一定的问题。
[Abstract]:[objective] to find out the configuration, calibration and performance of industrial frequency electric field measuring instruments in Guangdong Province. [methods] the calibration certificates of 40 power frequency electric field measuring instruments (hereinafter referred to as "reference instruments") of 40 occupational health technical service institutions in Guangdong province were studied. Taking a transformer as the standard source, the organization uses the same instrument to test the stability of the transformer in different time periods at a distance of 1.0 m. The single factor variance analysis method is used to test the stability of the transformer. After the stability test, the reference instrument was used to compare the measured points between 1.5 m and 2.0 m from the standard source, and the z fraction based on the quadrant robust statistical technique was used to analyze the measurement results. [results] in the standard source stability test, the electric field intensity was compared in three periods in the afternoon of the first day, the second morning and the afternoon of the second day. There was no significant difference between them [209.52 卤0.38 卤209.96 卤0.51] and 209.74 卤0.60 V / m (P0.05), which indicated that the standard source could meet the stability requirement of comparison between laboratories. 1 of 40 reference instruments had not been checked and 2 of them had expired the calibration certificate of 1 reference instrument. The Z / Z fraction of 40 reference instruments was -1.16 ~ 13.41, and the Z / Z fraction of Z _ W was -1.29 ~ 25.26, among which two reference instruments zB and zW were 3.001.00, which were outliers, 4 reference instruments zB or zW _ 2.00, and the results were problematic. According to the results of comparison, three reference instruments were determined to be unqualified. [conclusion] it is feasible to compare the power frequency electric field measuring instrument with transformer as the standard source. At present, there are still some problems in the use of the power frequency electric field measuring instrument in Guangdong occupational health technical service organization.
【作者单位】：广东省职业病防治院物理因素监测所广东省职业病防治重点实验室;罗湖医院集团社区健康管理中心公共卫生与健康促进部;
【基金】：[基金项目]广东省职业病防治重点实验室(编号:2012A061400007)
【分类号】：R134.4

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