目的:設計一種功能性電激勵(FES)信號發生器,主要用于刺激患者截癱部位以促進自身部分運動功能的恢復。方法:硬件系統基于AT89C52MCU和DAC0832數模轉換芯片。通過分析常見波形和動物實驗中提取出的控制運動的神經信號波形的時域特征來設計單片機程序,實現軟硬件協同之后,可產生預期波形作為治療儀的信號源。結果:經過測試,該信號發生器給出了各時域波形圖,包括如正弦波、矩形波、三角波等常見信號,以及與控制運動相關的神經信號波段。結論:與傳統的信號發生器[1]相比,該信號發生器結構簡單,功能齊全,成本低廉。并且,記錄與控制運動相關的神經信號,通過數據分析編入程序共同作為運動功能康復治療儀的信號源,這更有利于誘發協調的肢體動作,減少肌疲勞。

Objective: In order to promote paraplegia patients’ recovery of part of motor function, we design this functional electrical stimulation(FES) signal generator. Method: The hardware system consists of main control unit, conversion unit and output unit,with AT89 C52 MCU and DAC0832 digital analog converter as the core.By analyzing the time domain characteristics of common waveforms and the neural signals which relate movement from animal experiments, we design SCM program to cooperate hardware design with software, and then the expected waveforms can be produced as signal sources of therapeutic apparatus. Results: After tests, this signal generator can produce each signal in the time domain waveform, including common waveforms such as sine wave,rectangular wave, triangular wave signal, and neural signal bands relating movement.Conclusion: Compared with the traditional signal generators[1], the signal generator has the advantages of simple structure, complete functions, low cost, convenient use. At the same time, using the neural signals which relate movement from animal experiments as signal sources of motor function rehabilitation treatment instrument is beneficial to induce the coordinated movement and reduce muscle fatigue.

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