本系统基于脑电信号的节律同步化效应,利用外部刺激方法,使人脑进入需要的波段,达到调节精神状态、治疗一些心态疾病的目的.系统采用51系列单片机控制DDS系列AD9851芯片输出高精度的可调频刺激信号,最终以不同频率的声、光刺激信号作为输出.通过实验研究了脑电频率调节的刺激模式和时序,验证了节律同步化效应.该电路经过实物样机测试,完全达到实际使用要求,具有安全、可靠和低成本等优点.%The system was based on Rhythm synchronization effect of EEG. It can induce people's EEG frequency into required wave band by external stimulating, so as to adjust mental state to treat disease,a 51SCM was used in the circuit. The DDS series of AD9851 chip produced high precision sinusoidal signal and square wave signal whose frequency is adjustable* The finally output was different frequencies of stimulated sound or light signal. Through the experimental we studied the stimulation mode and timing of EEG frequency adjustment, verifying the rhythm synchronization effect. After physical prototype test, this circuit fully met the practical use requirements with advantages of safe and reliable and low cost.
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