Practical Implementation of a Novel Output Impedance Measurement Technique for EIT System While Attached to a Load

Area of Science:

• Electrical Engineering
• Biomedical Engineering
• Signal Processing

Background:

• Accurate measurement of current source output impedance is crucial for optimizing Electrical Impedance Tomography (EIT) system performance.
• Conventional methods often require system downtime or are less precise under operational conditions.

Purpose of the Study:

• To introduce and validate a novel method for measuring current source output impedance in EIT systems.
• To demonstrate the feasibility of in-situ impedance measurement during system operation with a connected load.

Main Methods:

• Implementation and testing of a new technique for real-time output impedance measurement.
• Comparison of adaptive source settings using impedance values obtained from the proposed method versus open circuit measurements.

Main Results:

• The proposed method allows for output impedance measurement while the EIT system is actively operating with a load attached.
• Utilizing shunt impedance values derived from the novel technique significantly enhances EIT system performance.
• Performance improvements were observed when adaptive sources were configured using the proposed method's values over those from open circuit measurements.

Conclusions:

• The developed method offers a practical and effective approach for in-situ output impedance characterization of current sources in EIT systems.
• Real-time impedance measurement and its application in adaptive source control lead to superior EIT system performance.