Single-channel vector magnetic information detection method based on diamond NV color center

A method of detecting the single channel triaxial magnetic field information based on diamond nitrogen-vacancy(NV)color center is introduced.Firstly,the incident angle of the bias magnetic field which can achieve the equal frequency difference optically-detected magnetic resonance(ODMR)spectrum of diamond NV color center is calculated theoretically,and the triaxial magnetic information solution model is also constructed.Secondly,the microwave time-controlled circuit module is designed to generate equal timing and equal frequency difference microwave pulse signals in one channel.Combining with the optical detection magnetic resonance technology,the purpose of sequentially locking and detecting the four formant signals on one side of the diamond NV color center(m_(s)=-1 state signal)is achieved,and the vector magnetic field information detection is accomplished by combining the triaxial magnetic information solution model.The system can obtain magnetic field detection in a range of 0 mT-0.82 mT.The system's magnetic noise sensitivity is 14.2 nT/Hz^(1/2),and the deviation angle errors of magnetic field detectionθ_(x) andθ_(y) are 1.3° and 8.2° respectively.

基于磁致旋光效应的双路MOEMS加速度传感方法

基于磁致旋光效应的加速度传感机理,提出了一种双路加速度传感方法。通过设置双路磁光晶体,利用其中一路磁光晶体敏感加速度信号引起的磁致旋光效应,另一路磁光晶体敏感外界的磁、热噪声并作为参考信号,通过对双路信号的同步差分检测,以去除外界磁、热噪声对磁光晶体的干扰。实验结果表明,基于磁致旋光效应的双路微光电子机械系统(MOEMS)加速度传感方法的灵敏度为314.3 mV/g,噪声谱密度为■,零偏不稳定性为29.1μg,表现出了较高的传感性能。相较于单路系统,双路差分检测有效去除了外界磁、热噪声的影响,提高了加速度传感的检测精度及应用范围。