The invention provides an electrocardiograph fault self-diagnosis method and
system based on lead wire automatic identification, and the method comprises the steps: triggering a frequency
sweep generator according to an equipment starting
signal, carrying out the pre-conduction detection of lead wires, then applying an
excitation signal in a continuous frequency range to each lead wire, recording the
signal collection time length of each frequency point in real time, and carrying out the real-time detection of the
signal collection time length of each frequency point; obtaining response
voltage and current data to determine a real-time
impedance spectrum; performing frequency point alignment
processing on the real-time
impedance spectrum and a corresponding standard
fingerprint, selecting frequency points in a key
frequency band of the electrocardiosignal, and comparing amplitudes and
phase deviation values of the real-time
impedance spectrum and the corresponding standard
fingerprint on the key frequency points to obtain a spectrum
difference vector; and if the amplitude deviation of the spectrum
difference vector exceeds a preset disconnection threshold value, judging that the lead wire has a disconnection fault, performing reverse signal back test on an interface end corresponding to the faulted lead wire, and recording a judgment result in a fault log to obtain a disconnection identification mark.