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基于对心电信号记录系统原理的讨论,给出具体电路图和实际记录结果。采用脉冲宽度调制技术,较好地克服了普通盒式录音机带进不稳和抖晃造成的误差;调解器中采用特殊的峰值检测方法并解决了可与各种不同型号录音机匹配的难题。用本系统记录和回放的心电波形准确,完全符合临床诊断的要求。
Based on the discussion of the principle of the ECG signal recording system, the specific circuit diagram and actual recording results are given. The pulse width modulation (PWM) technique is adopted to overcome the error brought by the instability and jitter of ordinary cassette players. The special peak detection method is adopted in the demodulator and the problem that can be matched with various types of sound recorders is solved. ECG waveform recorded and played back by this system is accurate and fully meets the requirements of clinical diagnosis.