超微力发生系统及其电容采集模块的设计  

Design of Micro Force Realization System and Capacitance Acquisition Module

作　　者：盛阳[1] 赵美蓉[1] 刘明[1] 齐永岳[1] 林玉池[1] 

机构地区：[1]天津大学精密测试技术及仪器国家重点实验室,天津300072

出　　处：《传感技术学报》2010年第10期1505-1509,共5页Chinese Journal of Sensors and Actuators

基　　金：天津市自然科学基金项目资助(09JCYBJC05200)"超微力值测量及溯源中的关键技术研究"

摘　　要：阐述了静电场复现微小力值的原理及实验方法;设计了超微力发生装置,并在此基础上提出了超微力发生系统;超微力发生的原理表明,电容采集模块是超微力发生系统的关键模块。根据超微力发生装置结构,选用USB控制芯片CY7C68013和电容采集芯片AD7747,设计了基于USB2.0的电容采集电路,编写了固件和上位机控制程序实现了电容数据的采集和保存;进行了电容梯度测量实验。Principle of micro force realization using electrostatic field and experiment step were illustrated.A micro force realization device and a micro force realization system based on this device were designed.The micro force realization principle presents that capacitance acquisition module is an important part of the micro force realization system.According to the mechanical structure of the device the acquisition circuit based on USB2.0 technology using USB control IC CY7C68013 and the capacitance-to-digital converter IC AD7747 was designed.The firmware of the USB control IC and the PC control software to handle and save the capacitance data were developed.At the end the capacitance gradient experiment was carried out.

关 键 词：超微力测量 超微力发生系统 静电场 USB2.0 电容采集 电容梯度 

分 类 号：TH823[机械工程—仪器科学与技术]