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脑出血的实时监测能够极大地降低其致残率和致死率,本文基于磁感应相位移原理,结合硬件滤波放大模块、PXI数据采集系统和LabVIEW软件,采用带通采样和相关法鉴相,建立了脑出血的实时监测系统,并通过盐水模拟脑出血实验和兔子脑出血实验测试及评估系统性能。系统测量单次相位差的时间约为0.030 4s;相位差变化值与盐水和血液的体积都成正比,实验结果与理论一致。结果表明,该系统能够实时监测出脑出血的进展情况,并且系统造价低,体积小,鉴相精度高,反应灵敏,具有较好的应用前景。
Real-time monitoring of intracerebral hemorrhage can greatly reduce its morbidity and mortality. Based on the principle of magnetic induction phase shift, combined with hardware filter amplification module, PXI data acquisition system and LabVIEW software, Real-time monitoring system of cerebral hemorrhage, and tested and evaluated the system performance by saline simulated cerebral hemorrhage test and rabbit intracerebral hemorrhage. The system measures the time of single phase difference about 0.030 4s; the phase difference changes with the volume of the saline and the blood are proportional to the experimental results consistent with the theory. The results show that the system can monitor the progress of cerebral hemorrhage in real time, and has the advantages of low system cost, small volume, high precision of phase identification, quick response, and good application prospect.