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一、前言秦皇岛港是我国煤炭输出的最大港口。为了适应对外贸易发展的需要,根据以发货港检验结果为结算依据的贸易惯例。改变几十年来人工取样劳动强度大、效率低、人为误差大的状况,同时为加快火车皮及船舶在港的周转,增加港口的吞吐量,我局从美国引进出口煤炭机械化采样成套设备,经单机运转,空载、重载联动试运转后。在中美双方技术总代表的监督下由中美双方共同对其进行了性能验收——系统误差试验。二、系统誤差试验方案的设计要对采样整个系统和采样各个设备进行评价时,就要求作出肯定(接受)或否定的答案(退货)。因此提出了系统误差试验即成对子样对比法。机械采样系统所
I. Introduction Qinhuangdao Port is China’s largest coal export port. In order to meet the needs of foreign trade development, according to the port of shipment test results based on the settlement of trade practices. In the meantime, in order to speed up the turnover of trains and ships in Hong Kong and increase the throughput of ports, the Bureau imported and exported a complete set of equipment for exporting coal mechanized samples from the United States. Stand-alone operation, no-load, heavy load linkage test run. Under the supervision of the chief technical representatives of China and the United States, both China and the United States jointly conducted a performance check on them - the systematic error test. Second, the system error test program design Sampling the entire system and sampling the various devices for evaluation, it is required to make a positive (accepted) or negative answer (return). Therefore, a systematic error test is proposed as a paired sub-sample comparison method. Mechanical sampling system