DSP-based current source for electrical impedance tomography.
DSP-based current source for electrical impedance tomography.
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DOI：
10.1088/1361-6579/ab8f74
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发表时间：
2020-06-30
影响因子：
3.2
通讯作者：
Shishvan OR
中科院分区：
文献类型：
--
作者：
Saulnier GJ;Abdelwahab A;Shishvan OR
EIT系统，特别是那些使用并联多源架构的系统，需要具有非常高的输出阻抗的电流源。为了满足这一要求，电源通常使用复杂的模拟电路，并需要手动或电子控制的调整。我们的目标是实现一个简单的，免调整的模拟电子产品的电流源，具有高有效的输出阻抗，即使在其输出显着的杂散阻抗。提供给电压-电流转换器的激励被调整以适应有限输出和杂散阻抗中的电流损耗。自适应算法使用测量的电压和先前测量的输出和杂散阻抗来确定所需的电流调整。的源的结构是沿着与实施，和实验结果表明，该方法的有效性的频率高达1 MHz。测量的输出阻抗与和没有自适应补偿，以及电阻性和复杂的负载的测量。新的电流源具有低模拟复杂性，工作在很宽的频率范围内，并可以补偿一个显着的杂散分流阻抗。它可用于实现改进的并行或串行EIT系统。
EIT systems, particularly those that use a parallel, multiple source architecture, require current sources with very high output impedance. To meet this requirement, sources often use complex analog circuits and require manual or electronically-controlled adjustments. The goal is to implement a current source with simple, adjustment-free analog electronics with high effective output impedance even with significant stray impedance at its output. The excitation provided to the voltage-to-current converter is adjusted to accommodate the current lost in the finite output and stray impedances. The adaptive algorithm uses the measured voltage and the previously-measured output and stray impedance to determine the needed current adjustment. The structure of the source is presented along with an implementation, and experimental results that show the effectiveness of the approach for frequencies up to 1 MHz. The measured output impedance with and without the adaptive compensation are presented as well as measurements of resistive and complex loads. The new current source has low analog complexity, operates over a wide range of frequencies, and can compensate for a significant stray shunt impedance. It can be used to implement improved parallel or serial EIT systems.
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DOI：
10.1109/tbcas.2018.2834412
发表时间：
2018-08-01
影响因子：
5.1
作者：
Rao, Arun;Teng, Yueh-Ching;Odame, Kofi
通讯作者：
Odame, Kofi
影响因子：
1.4
作者：
Freeborn, Todd J.;Crenshaw, Tim;Critcher, Shelby
通讯作者：
Critcher, Shelby
影响因子：
3.2
作者：
Rao, A. J.;Murphy, E. K.;Odame, K. M.
通讯作者：
Odame, K. M.
多频同步电阻抗断层扫描电流源设计
影响因子：
1.6
作者：
Han, Bing;Xu, Yanbin;Dong, Feng
通讯作者：
Dong, Feng
影响因子：
4.6
作者：
COOK, RD;SAULNIER, GJ;ISAACSON, D
通讯作者：
ISAACSON, D