对试验用参考喷头参数进行了标定,并对压力传感器、流量传感器的测量精度进行了标定,在标定基础上,对试验台的分布测试误差进行了分析,最后对进行修正后的试验台进行检验。通过标定得出:雾化喷头在不同压力下的流量测量值与手册参考值之间的最大误差为2.70%,压力传感器的压力损失修正值为0.01 MPa,流量传感器测量平均值与标准喷头流量误差为1.2%。在相同的压力下,试验台收集流量平均值与标准喷头流量之间最大误差为2.84%。雾台测量误差随测量时间的增大而减小,当测量时间达到200 s时,误差基本稳定,最大误差为0.8%。通过对修正的测试系统进行检验,发现集雾台测量值与标准喷头流量最大误差为0.7%,说明该试验台可以满足测量时的高精度要求。
Abstract
In order to improve testing precision of test bed and the test accuracy of atomizing nozzle test bed be researched. Firstly, reference nozzle parameters were calibrated, and then, the measurement accuracy of pressure sensors and flow sensors were calibrated. Based on the calibration, the test errors of distributions of test bed was analyzed, finally, inspect the test-bed through amendment value. Through calibration can draw: At different pressures, the maximum error between the atomizing nozzle testing value and the reference value is 2.70%. The correction value of pressure sensor is 0.01 MPa. The error between the average flow sensor measuring and reference value is 1.2%. Under the same pressure, the maximum error between the average flow value of test-bed and reference value is 2.84%. The measuring errors become decreases with the measuring time increase. When measure time reaches to 200 s, the error basically stable, the maximum error is 0.8%. Through testing of amendment test system can found that the maximum error between the measurements of test-bed and reference values is 0.7%, showing that the test-bed can meet high-accuracy measurement requirements.
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基金
收稿日期:2012-12-17 修回日期:2013-02-20
基金项目:国家林业公益性行业科研专项项目(201004052); 江苏高校优势学科建设工程资助项目(PAPD); 南京林业大学自制实验室设备项目
第一作者:吴小伟,博士生。*通信作者:周宏平,教授。E-mail:hpzhou@njfu.edu.cn。
引文格式:吴小伟,周宏平,许林云,等. 雾化喷头试验台测试精度分析[J]. 南京林业大学学报:自然科学版,2013,37(6):137-141.
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