An implantable wireless powered light source

A wireless powered small volume light source composed of light emitting diode(LED) array is developed for implantation. According to the volt-ampere characteristics of LED and the load characteristics of coil coupling power supply, the light power and work distance of implant LED-array are optimized by changing the number and series-parallel connection mode of LEDs in receiver. The wireless powered implant can provide 5.4 m W light. The entire implant is seamlessly packaged within parylene, a biocompatible material, coating by chemical vapor depositing. The volume of the implant is 9 mm×4 mm×3 mm, the weight of which is only 0.25 g. The device can work continuously for more than three weeks in 0.9% saline and the prime prototype of the device has been validated by animal implantation.     

基于主动干电极传感器的无线可穿戴脑电采集系统

为了减少脑电信号(EEG)采集系统的复杂性、实验前长时间繁琐的准备过程,以及改善采集系统的抗干扰性、可穿戴性和舒适性,设计了一种带有8通道主动干电极传感器的无线可穿戴脑电采集系统,具有24位ADC,109 dB信噪比,±500 mV/10 Hz的交流输入范围.实验结果表明:该系统和商业系统记录的脑电图波形之间的相关系数为0.89,增加了可穿戴无线采集系统的可靠性,改善穿戴的舒适性.采用该系统可实现脑电的静态记录和基于稳态视觉诱发(SSVEP)的脑-机接口(BCI)应用.