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一、引言随着生物医学工程研究的深入,对信息的记录质量要求越来越高。理想的记录仪应具有以下特点: 1.能直接观察记录图形,而没有普通示波器使用上的不便。记录纸应价廉而获取容易,记录的信息能长期保存。 2.工作频率范围宽,能充分满足研究上的需要,因为一般如心电信号频谱范围为0.08～200周,心音20～1000周。即使10～5000周的肌电信号,也希望能复盖到基频部分。 3.能够描记矩形线条。阶跃特性、阻尼度和线性度要佳。
I. INTRODUCTION With the deepening of biomedical engineering research, the quality of information recording is getting higher and higher. The ideal recorder should have the following characteristics: 1. Can directly observe the recording graphics, but not the inconvenience of using a normal oscilloscope. Recording paper should be cheap and easy access, long-term preservation of recorded information. 2. Wide operating frequency range, can fully meet the research needs, because the general ECG signal spectrum range of 0.08 to 200 weeks, heart sound 20 to 1000 weeks. Even 10 to 5000 weeks EMG signal, but also hope to cover the baseband section. 3. Can trace rectangular lines. Stepper characteristics, damping and linearity are better.