论文部分内容阅读
为了降低人体适应性对电刺激效果的影响,介绍了一种基于混沌信号的电刺激系统设计方法。首先在PC机上采用MATLAB软件构建混沌模型,经迭代运算产生混沌信号。用NI公司的数据采集卡USB-6251将信号输出到外部设备,再用LM3886模块对信号进行功率放大。经粘贴或绑缚在人体皮肤上的电极,传入信号以刺激内部神经。通过改变混沌模型的参数可获得不同的刺激效果,从而降低了因生理电刺激适应性而导致的电刺激效果变差的影响。测试结果表明:混沌信号的随机性增加了电刺激波形的多样性;混沌信号的规则性保证了电刺激过程的舒适感,提出的方法为电刺激仪器的设计提供了一个新的方向。
In order to reduce the influence of human body adaptability on the effect of electrical stimulation, a design method of electrical stimulation system based on chaos signal is introduced. Firstly, the chaos model is built by MATLAB software on the PC, and the chaotic signal is generated by iterative operation. With NI’s data acquisition card USB-6251 the signal output to external devices, and then LM3886 module to signal power amplification. Electrodes pasted on or bound to human skin transmit signals to stimulate internal nerves. By changing the parameters of the chaotic model, different stimulation effects can be obtained, thereby reducing the influence of the deterioration of the electrical stimulation effect caused by the physiological electrical stimulation adaptation. The test results show that the randomness of the chaotic signal increases the diversity of the electrical stimulation waveform. The regularity of the chaotic signal ensures the comfort of the electrical stimulation process. The proposed method provides a new direction for the design of the electrical stimulation device.