Subjects: Geosciences >> Space Physics submitted time 2017-03-10
Abstract：为了实现对不同频率超声波信号的高速采集，提出了一种基于可编程滤波器、USB2.0和C#的接收频率可调的超声波信号接收与采集系统设计方案，并完成了系统的软硬件设计。该系统的硬件部分主要用来数字量化模拟信号并将其上传至上位机，软件部分采用C语言和C#编程，以实现数据的正常采集与上传保存。实际应用表明，该系统具有操作简便、测试准确、使用灵活的特点，达到了设计要求。
Peer Review Status:
Awaiting Review
Subjects: Geosciences >> Space Physics submitted time 2016-05-13
Abstract： The production and measurement system of uniform axial hypomagnetic field based on Silicon Labs C8051F005 micro-processor is designed for the research on biological effects of the hypomagnetic field. A new structure for producing uniform axial hypomagnetic field is suggested according to the principle of magnetic field generated by Helmholtz coil. MAX038 is used for hardware circuit to generate the alternating magnetic field. The magnetic field can be accurately measured by magnetoresistive sensor, the data of which are transferred to the host computer via serial port, and then displayed graphically in real time. The uniformity of the magnetic field generated with the new structure is experimentally demonstrated to be better than that generated with Helmholtz coil. Experiments show that the magnetic field intensity is proportional to the current, and has the well controllability. The frequency of alternating magnetic field can be controlled by simple parameter setting.
Peer Review Status:Awaiting Review
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