Variational Mode Decomposition-based Synchronous Multi-Frequency Electrical Impedance Tomography

Electrical Impedance Tomography (EIT) can perform non-invasive, low-cost, safe, fast, and simple system structure functional imaging to map the distribution changes of root zone. Multi frequency EIT solves problem that single-frequency only carry more impedance information than a given single excitation frequency. It still remains challenges simultaneously obtain multi-frequency electrical tomography. To address problem, mixed signal superimposed by multiple frequencies is injected object. Essentially, separating measured voltage signals, which be used at different same time quickly. Since measurement signal, effect decomposing directly affects accuracy imaging. In order accurate data, this article variational mode decomposition (VMD) method decompose signal. Accurate amplitude phase could obtained in excitation, these data reconstruct The results showed proposed achieve expected effect. was concluded using modal process signals better, it applied practice.