A New Control Method to Generate RF signal for a Novel NMR Magnetometer

摘要：

The main purpose of nuclear magnetic resonance (NMR) magnetometer is to calibrate the magnetic field. The core of the traditional NMR magnetometer is marginal oscillator, but the precision of marginal oscillator is not high enough. The paper chiefly presents a new control method to generate RF signal for a novel NMR magnetometer. The basic structure and operation principle of the novel NMR magnetometer is simply described here. In order to improve the precision of NMR magnetometer, the RF signal is generated by the Direct Digital Synthesizer (DDS) technology and the Phase Locked Loop (PLL) technology instead of the marginal oscillator. The circuit system of generating RF is designed and developed. The working performance is tested. Its precision is approximately 0.1ppm. The experimental result shows that this control method is feasible and the NMR signal can be detected clearly.

关键词： NMR Magnetometer Direct Digital Synthesizer (DDS) Phase Locked Loop (PLL) Marginal Oscillator

作者: Chunli Wu engchao Lv Ying Chen

作者单位: College of Information Science and Engineering, Northeastern University, Shenyang, 110819

会议类型: 国际会议

会议名称: The 24th Chinese Control and Decision Conference (第24届中国控制与决策学术年会 2012 CCDC)

会议地点: 太原

会议语种:英文

页码: 2785-2788

在线出版日期: 2012-05-23（万方平台首次上网日期，不代表论文的发表时间）