EIM multi-frequency Measurement System Based on Virtual Instrument

In the process of instrumental strength training, real-time monitoring of muscle state changes is of great significance. This paper mainly studies the Electrical Impedance Myography (EIM) multi-frequency measurement system based on virtual instruments to track the changes of muscle state in real-time. Firstly, the multi-frequency excitation signal is realized on LabVIEW and transmitted by the DAQmx driver function. The signal is converted by a constant current source and output to the human body. The signal receiver realizes signal acquisition, window function design, and demodulation unit design. Finally, the time parameter processing method is proposed, and the time-varying impedance spectrum changing synchronously with the muscle state is collected.