光纤陀螺电路辐射磁场的测试

Testing on Radiation Magnetic Field of FOG Circuit

针对光纤陀螺工程应用中的磁场问题,为了摸清电路辐射磁场的数值,探究了陀螺内部电路产生磁场的分布规律。搭建了电磁场分布扫描系统,对陀螺电路正底面分别进行了预扫描和精确扫描;依据扫描结果计算了磁场参数,并分析了电路磁场对陀螺磁敏感相位误差的影响。实验结果表明,陀螺电路磁场整体辐射较小,正面电路辐射强度大于底面电路;正面辐射在8.76 MHz频率下辐射最强,约为0.01 mGs。对于光纤陀螺磁敏感性研究提供了数据参考。

For the magnetic field issue in the engineering application of Fiber Optic Gyroscope(FOG),in order to find out the value of the radiated magnetic field of the circuit,the distribution regularity of magnetic field generated by the internal circuit of gyroscope is researched.Firstly,the scanning system of electromagnetic field distribution is set up,and the front and bottom surfaces of gyro circuit are performed pre-scanning and precisely scanning respectively.Secondly,the magnetic field parameters are calculated according to the scanning results,and the influence of circuit magnetic field on the phase error of gyro magnetic sensitivity is analyzed.The experimental results show that the overall radiation of FOG circuit magnetic field is low,and the front circuit radiation intensity is higher than that of bottom circuit.The front radiation is the strongest at 8.76 MHz,approximately 0.01 mGs.It provides data reference for the study of FOG magnetic sensitivity.