According to the principle of view the Doppler frequency detection, the detector makes up of the transmitter, the transfer circuit, receiver and signal processing circuit.
根据多卜勒频偏检测原理，该探测器由发射机、转换电路、接收机和信号处理电路构成，发射信号是设计的关键。
The simulation result shows that VPSD is a kind of constant false alarm rate detector, which can detect HFM signal effectively in low SNR, and can adapt to the Doppler mismatch very well.
仿真结果表明，周期斜率方差检测器是一种恒虚警概率检测器，在较低信噪比下可有效检测双曲调频信号，并对多普勒失配有很好的适配性。
Color Doppler ultrasound study of 150 patients detector object carotid ultrasonography, observed the nature of carotid artery plaque, and serum high-sensitivity C-reactive protein levels.
应用彩色多普勒超声检测仪对150例研究对象进行颈动脉超声检查，观测颈动脉斑块性质，并检测血清高敏c反应蛋白水平。
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