基于双端固定音叉的润滑剂微黏着力测量系统  

Double-ended Fixation Tuning Fork Based Lubricant Micro Adhesive Force Measurement System

作　　者：刘卿卿[1,2] 李冉 LIU Qing-qing;LI Ran(Department of Information&Control,Nanjing University of Information Science&Technology,Nanjing 210044,China;Collaborative Innovation Center on Atmospheric Environment and Equipment Technology,Nanjing University of Information Science&Technology,Nanjing 210044,China;Nanjing Telecommunication Technology Institute,Nanjing 210007,China)

机构地区：[1]南京信息工程大学信息与控制学院,江苏南京210044 [2]南京信息工程大学大气环境与装备技术协同创新中心,江苏南京210044 [3]南京电讯技术研究所,江苏南京210007

出　　处：《仪表技术与传感器》2018年第10期59-62,共4页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(61701244)

摘　　要：针对普通石英音叉测力时,其开放端耦合探针导致品质因数(Q值)降低的问题,设计一种基于双端固定石英音叉的微力测量系统,用于润滑剂微黏着力测量。该系统将双端固定石英音叉固定端与一光纤探针耦合,形成对称结构,采用宽度弯曲振动模式,以计算机控制压电微动实验台负载被检测样品接近或远离光纤探针,并实时监测石英音叉振动的幅值和相位变化,以AD630芯片为核心设计锁相放大器比较传感器输入与输出信号的幅值和相位差,进而反演润滑剂的竖直方向黏着力。实验结果表明探针耦合前后,系统均具有较高Q值,且装置结构简单,易于扩展。Aiming at the problem of quality factor reduction was caused by the open end coupling probe when measuring the force of ordinary quartz tuning fork,a new kind of quartz double-ended fixation tuning fort based force measuring system was designed for lubricant adhesion measurement.An optical fiber probe was adhered to the end of the quartz double-ended tuning fork to form a symmetric structure,the quartz double-ended tuning fork oscillated in width bending vibration mode,and the vibration amplitude and phase changes of the quartz tuning fork were detected in real-time,when a piezo stage with the sample lubricant keeping close to or far away from the optical fiber probe.The amplitude and phase shifts of input and output signals of the quartz tuning fort were compared with the AD630 chip based lock-in amplifier,and then the vertical adhesive force of lubricant is reversed.The results show that the system has the high Q factor,simple structure and is easy to expand.

关 键 词：双端固定石英音叉 光纤探针 锁相放大器 品质因数 润滑剂 

分 类 号：TH823[机械工程—仪器科学与技术]