YANG Bin1, GU Li-chen1,2, LIU Yong1,3, WANG Ping1
(1. National Engineering Laboratory for Highway Maintenance Equipment, Chang’an University, Xi’an 710064, China; 2. School of Mechanical and Electronic Engineering, Xi’an University of Architecture and Technology, Xi’an 710054, China;3. School of Mechanical Engineering, Hubei University of Automotive Industries, Shiyan 442002, China)
Abstract： In order to monitor the working state of piston motor and measure its instantaneous rotation speed accurately, the measuring principle and method of instantaneous rotation speed based on industrial personal computer and data acquisition card are introduced, and the major error source, influence mechanism and processing method of data quantization error are discussed. By means of hybrid programming approach of LabVIEW and MATLAB, the instantaneous rotation speed measurement system for the piston motor in variable speed hydraulic system is designed. The simulation and experimental results show that the designed instantaneous speed measurement system is feasible. Furthermore, the sampling frequency has an important influence on the instantaneous rotation speed measurement of piston motor and higher sampling frequency can lower quantization error and improve measurement accuracy.
Key words： variable speed hydraulic system; instantaneous rotation speed measurement; error analysis; hybrid programming
CLD number： TP271+.31 Document code： A
Article ID： 1674-8042（2015）04-0315-07 doi： 10.3969/j.issn.1674-8042.2015.04.002
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变转速液压系统瞬时转速测量与误差分析
杨彬1， 谷立臣1,2， 刘永1,3， 王平1
（1. 长安大学 公路养护装备国家工程实验室， 陕西 西安 710064； 2. 西安建筑科技大学 机电工程学院， 陕西 西安 710054；3. 湖北汽车工业学院 机械工程学院， 湖北 十堰 442002）
摘要:为实时监测柱塞马达的运行状态， 准确测量瞬时转速， 结合基于工控机与数据采集卡的瞬时转速测量原理与算法， 讨论了数据量化误差的主要来源、 影响机理以及处理方法， 利用LabVIEW与Matlab混合编程的方法， 设计了变转速液压系统柱塞马达瞬时转速的测量系统， 通过实验验证了测速系统的可行性。 仿真与实验结果表明， 采样频率对马达转速测量具有重要影响。 提高采样频率可以减小数据量化误差、 提高测量精度。
关键词:变转速液压系统； 瞬时转速； 误差分析； 混合编程
引用格式：YANG Bin, GU Li-chen, LIU Yong, et al. Instantaneous rotation speed measurement and error analysis for variable speed hydraulic system. Journal of Measurement Science and Instrumentation, 2015, 6(4)： 315-321. ［doi： 10.3969／j.issn.1674-8042.2015.04.002］
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