CAJ | 학술논문

电容/电压转换电路是电容层析成像系统硬件核心部件。现有交流型转换电路均工作在单模式方式，即反馈平衡方式或者非反馈方式，且激励信号幅值固定，使得电路功能较为单一，不能灵活应用于各种传感器结构、各种成像速率要求的场合。本文提出并实现了电容层析成像系统用激励信号幅值可控双模式交流型电容/电压转换电路。该电路不仅克服了现有转换电路在应用中的不足，而且实验表明电路的线性度、分辨率、稳定性等性能指标均达到成像系统的要求。
전용/전압전환전로시전용층석성상계통경건핵심부건。현유교류형전환전로균공작재단모식방식，즉반궤평형방식혹자비반궤방식，차격려신호폭치고정，사득전로공능교위단일，불능령활응용우각충전감기결구、각충성상속솔요구적장합。본문제출병실현료전용층석성상계통용격려신호폭치가공쌍모식교류형전용/전압전환전로。해전로불부극복료현유전환전로재응용중적불족，이차실험표명전로적선성도、분변솔、은정성등성능지표균체도성상계통적요구。
Capacitance/voltage converting circuit is the main part of electrical capacitance tomography.The exis-ting AC converting circuits all work at single mode,e.g.feedback-balancing or no-feedback mode,and the exciting signal amplitude is fixed.The function of circuits is limited by these factors,and these circuits can not adapt to all kinds of configuration of sensor and imaging rate.A new AC capacitance/voltage circuit of controllable exciting signal amplitude and two working modes is provided and implemented as well in this paper.The circuit not only overcomes the limitations of existing circuit but also satisfies the requirement of tomography system in linearity,resolution and stability by the results of experimentation.