悬臂式涡街流量传感器频率特性优化方法  

Optimization method of frequency characteristics of cantilever vortex flow sensor

作　　者：孔令稳 邵颖健 叶凌云[1] 

机构地区：[1]浙江大学生物医学工程与仪器学院,浙江杭州310027 [2]宁波东驰测控技术有限公司,浙江宁波315400

出　　处：《传感器与微系统》2014年第8期59-61,72,共4页Transducer and Microsystem Technologies

摘　　要：针对悬臂式涡街流量传感器固有频率较低,在大流量测量时信号失真较大的问题,研究了其固有频率的影响因素,并提出了固有频率的提高方法。仿真结果与实际测试表明:传感器悬臂梁总长度与上下部长度比例k是影响固有频率的主要因素。通过优化传感器的两项参数,125mm口径的传感器固有频率从原来的1620Hz提高到2880Hz,提升幅度达77.7%。Aiming at problem that cantilever vortex flow sensor has low natural frequency, signal distortion is large in large flow measurement, factors that affect natural frequency are studied, and the method to improve natural frequency is proposed. Simulation results and experimental test show that the ratio of the length of cantilever respective length of the upper and lower part is the main factor which affects natural frequency. By optimizing these two factors, natural frequency of the sensor with 125 mm caliber is increased from 1620 Hz to 2 880 Hz, enhancing rate is 77.7 %.

关 键 词：涡街流量传感器 固有频率 数值仿真 悬臂梁 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]