Method and apparatus for triggering external diaphragm pacemaker by using surface electromyogram signal as synchronization signal
A technology of synchronizing signal and muscle pacemaker, applied in the medical field, can solve the problems of limited application of respiratory muscle surface electromyography, interference, and difficulty in extracting electromyography signals.
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[0069] An application specific embodiment of the present invention:
[0070] 1), functional requirements and parameter values
[0071] a. Sampling and AD converting the output signal of the body surface diaphragm muscle electromyography measurement circuit, the precision is 12bit, and the sampling frequency is initially selected as 4K / s;
[0072] b. Perform fourth-order low-pass filtering (cutoff frequency 600Hz) and power frequency notch (optional 50Hz and 60Hz) processing on the signal;
[0073] c. Calculate the myoelectric envelope and form a synchronous signal, and use this synchronous signal to control the signal output of the external diaphragm pacemaker;
[0074] 2), filtering, envelope calculation and synchronous signal generation algorithm
[0075] a. Fourth-order low-pass filter and power frequency notch
[0076] Low-pass filtering and power frequency notch, the pulse transfer function is:
[0077] G ( z ) ...
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