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电容测量
    New Small Capacitance Measuring Circuit for Capacitance Sensor
    电容传感器新型微弱电容测量电路
    Design of new capacitance measuring circuit for capacitance sensor
    电容传感器新型电容测量电路设计
    The Application of CPLD on Low Capacitance Measuring Circuit for Capacitance Sensor
    电容传感器微弱电容测量电路中CPLD的应用
    The capacitance measuring circuit for electrical capacitance tomography system
    电容层析成像系统的电容测量电路
    The Capacitance Measuring Circuit for Electrical Capacitance Tomography System
    电容层析成像系统微小电容测量电路的设计
    Design of the Rapid Testing Program for Capacitance Measuring Function from Digital Multimeter
    数字多用表电容测量功能快速检定程序设计
    The thesis studies application background and some discussion on capacitance measuring circuit for capacitance sensor,both domestic and overseas at present. Aiming at the characteristic of capacitive accelerometer using mercury that output background capacitance is high ,and variation is comparatively low, the thesis selects the capacitance measurement circuits based on charge amplification principle.
    本文研究了电容传感器测量电路的应用背景和国内外研究现状,针对水银电容加速度传感器的输出背景电容大、变化量相对小的特点,选择了基于电荷放大原理的电容测量电路。
    It has high resolution,good repeatability and linearity. It can be suitable for a variety of capacitance measuring interface circuit.
    这种电路分辨率高、复现性好、呈良好的线性关系,适用于各种电容测量接口电路。
    In this paper three types of low value capacitance measuring circuits,the charge/discharge circuit,the AC measuring circuit with feedback compensation,and the self-balancing capacitance measuring circuit are described,which are most suitable for the use in ECT system,Their advantages and disadvantages are also pointed out.
    本文介绍了ECT系统中最常用的3种微小电容检测电路—充电/放电电路、带反馈补偿的交流测量电路以及自平衡电容测量电路,并指出了它们的优缺点。
    This paper presents a low noise ,low drifting capacitance measuring circuit and computer interfuce circuit used in the 12electrode ECT system. The design of computer interface of the ECT can control the the selection of measuring channel and data capture is also given. 
    本文提出了一种适用于12电极ECT系统的低噪声、低漂移的电容测量电路及计算机接口电路,并介绍了利用该接口电路对测量通道的逻辑控制和图象重建数据的采集方法及实现。
    A new small capacitance measuring circuit based on charge amplifier principle was developed for capacitance sensor.
    基于电荷放大原理提出了一种新型的用于电容传感器的微弱电容测量电路。 该电路具有较强的抗杂散电容性能 ;
    Based on the experimental study of the capacitive angular position sensor of the metal tube variable area rotameter, this paper describes a designed method and principle of capacitive angular sensor & successful combination of intrinsically stray-immune capacitance measuring circuit so as to obtain high accuracy (0 05°),and resolution (0 01°)over the relative measurement range of 30°.
    本文针对新型金属管浮子流量计中电容式角位移传感器的研究 ,详细阐明电容式角位移传感器的设计方法及原理 ,并配合一种抗寄生干扰的微小电容测量电路 ,最终实现对浮子流量计中电容式角位移传感器转动角度的精确测量。 在 3 0°测量范围内 ,可实现精度 0 0 5°。
    Take the testing of capacitance measuring function from digital multimeter as an example, the paper introduced that computer can control the rapid adjusting of 5500A output module from RS232 interface by gliding the mouse wheel up and down. The method was widely used and can give user maximum convenience for it is very practicality.
    以UT52型数字多用表电容测量功能检定为例,介绍了利用鼠标滑轮上、下滑动,计算机通过RS323接口,实现对5500A输出快速调节的控制方法,此方法非常实用,对使用者带来极大的方便,具有广泛的借鉴价值。
    A new capacitance measuring circuit based on V/T is developed for capacitance sensor,it can be used to transform the low capacitance change into time and processed by single-chip microcomputer,the circuits for measuring is simple,the noise are also reduced greatly because of no any amplifier and instable components influenced by drift.
    提出了一种基于V/T变换的用于电容传感器的电容测量电路。 它将被测微小电容变化量转换成时间信号并由单片机进行处理,电路结构简单,电路中没有影响测量稳定性和产生零点漂移的元器件,大幅度地降低了测量过程中的噪声。
 

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