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中文摘要：
根据近红外光检测脑血氧的基本原理研制了一种新型的检测人脑局部血氧浓度变化的装置,利用具有双波长的LED光源和位于特定位置的光电探测器实现对脑血氧浓度变化的检测.该装置的CPU采用了高性能、低成本、低功耗的STM32芯片,该芯片具有12位的高精度AD转换器,抗干扰能力强.在信号检测中,通过将4路分离的信号分时经过同一个运放电路中进行放大,减少了因不同放大电路带来的误差.最后,通过人体手臂血液阻断实验和ISS Oximeter仪器对比,证明了该检测装置的有效性.
英文摘要：
According to the basic principle of near-infrared detecting method,a detection system is developed for monitoring the cerebral oxygen saturation changes of brains.LED light source with dual wavelength is located in different positions and the photoelectric detectors are used to monitor cerebral blood oxygen.The STM32 chip,used as CPU,is of high performance,low cost and low power.The chip features a high precision AD converter of 12 bit and strong antiinterference ability.In signal detection,the four separated signals by the same operational amplifier circuit for amplifying can reduce the error caused by different amplification circuits.The experiment of blood blocked in the forearm proves the effectiveness of the detection device.The results are also calibrated by ISS Oximeter.
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