音频大地电磁磁场传感器的研制
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摘要
感应式磁场传感器一直是我国电磁法仪器发展的瓶颈,国外大地电磁法中测量大地磁场主要采用感应式磁场传感器。为此,根据音频大地电磁场源的特点,从感应式磁场传感器的基本原理出发,设计传感器的磁芯和线圈绕组结构以及线圈的谐振频率;另外,采用了磁通负反馈技术和频率补偿的方法,扩展了传感器的频带,得到了在1 Hz～9.8 kHz频带范围内平坦度为±1.5 dB的灵敏度曲线,满足音频大地电磁探测的需要。
Magnetic field induction sensors have been the bottleneck in the development of electromagnetic devices in China.In abroad,the natural geomagnetic variations are mainly measured by magnetic field induction sensors in magnetotelluric methods.According to the characteristics of the natural geomagnetic variations in audio-frequency band and the basic principle of magnetic field induction sensors,the structure of core,coil winding and the resonant frequency of the sensor were designed.With the magnetic flux negative feedback and frequency compensation,the frequency band is extended and the flat resulting amplitude-frequency response is obtained in the frequency band of 1 Hz-9.8 kHz with the deviation no more than ±1.5 dB.It can be used in audio-frequency magnetotelluric sounding.
Magnetic field induction sensors have been the bottleneck in the development of electromagnetic devices in China.In abroad,the natural geomagnetic variations are mainly measured by magnetic field induction sensors in magnetotelluric methods.According to the characteristics of the natural geomagnetic variations in audio-frequency band and the basic principle of magnetic field induction sensors,the structure of core,coil winding and the resonant frequency of the sensor were designed.With the magnetic flux negative feedback and frequency compensation,the frequency band is extended and the flat resulting amplitude-frequency response is obtained in the frequency band of 1 Hz-9.8 kHz with the deviation no more than ±1.5 dB.It can be used in audio-frequency magnetotelluric sounding.
引文
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[14]王言章,程德福,王君,林君.基于纳米晶合金的宽频差分式磁场传感器的研制[J].传感技术学报,2007,20(9):1967-1969.WANG Yan-zhang,CHEN De-fu,WANG Jun,LIN Jun.Research of broad frequency difference magnetic field sensor based on nanocrystalline alloy[J].Chinese Journal of Sensors and Actuators,2007,20(9):1967-1969.
[15]邵英秋,程德福,王言章,张飞.基于磁反馈的宽频带磁传感器的研制[J].仪器仪表学报,2010,31(11):2461-2466.SHAO Ying-Qiu,CHEN De-fu,WANG Yan-zhang,ZHANG Fei.Development of broad frequency band magnetic field sensor based on flux feedback[J].Chinese Journal of Scientific Instrument,2010,31(11):2461-2466.
[16]林继鹏,王君,凌振宝,程德福.基于非晶态合金的感应式磁敏传感器的研究[J].仪器仪表学报,2004,25(2):195-198.LIN Ji-peng,WANG Jun,LING Zhen-bao,CHEN De-fu.Research for induction magnetic sensor based on amorphous alloy[J].Chinese Journal of Scientific Instrument,2004,25(2):195-198.
[2]KAUFMAN A A,KELLER G V.大地电磁测深法[M].刘国栋,晋光文,邓前辉,赵国泽,王宝钧,孙浩,译.北京:地震出版社,1987:1-40.KAUFMAN A A,KELLER G V.The magnetotelluric sounding method[M].LIU Guo-dong,JIN Guang-wen,DENG Qian-hui,ZHAO Guo-zhe,WANG Bao-jun,SUN Hao,transl.Beijing:Earthquake Publishing House,1987:1-40.
[3]陈文华,吴明启.音频大地电磁仪中磁传感器的设计和研究[J].河北地院学报,1982(12):14-26.CHEN Wen-hua,WU Ming-qi.Design and research of magnetic of Hebei University of Geological,1982(12):14-26.
[4]LENZ J E.A review of magnetic sensors[J].Proceedings of the IEEE,1990,78:973-989.
[5]邵英秋.感应式磁传感器线圈参数及其接口电路的研究[D].长春:吉林大学,2008:1-3.SHAO Ying-qiu.Magnetic induction sensor parameter of loop and study of its interface circuit[D].Changchun:Jilin University,2008:1-3.
[6]SEARN H C,FERGEAU P.An optimized low-frequency three-axis search coil magnetometer for space research[J].Review of Scientific Instruments,2005,76:1-10.
[7]张秀成.大地电磁测深测量及仪器[M].北京:地质出版社,1989:23-42.ZHANG Xiu-cheng.Magnetotelluric measurement instrumentation[M].Beijing:Geological Publishing House,1989:23-42.
[8]耿胜利.GCI-1A型磁感应传感器的铁芯工艺研究[J].仪表技术与传感器,1988(5):21-25.GENG Sheng-li.Research on ferromagnetic core of GCI-1A magnetic induction sensor[J].Instrument Technique and Sensor,1988(5):21-25.
[9]RIPKA P.Magnetic sensors and magnetometer[M].Norwood:Artech House,2001:57-65.
[10]BOZORTH R M,CHAPIN D M.Demagnetizing factor of rods[J].Journal of Applied Physics,1942,3:320-326.
[11]PAPERNO E,GROSZ A.A miniature and ultralow power search coil optimized for a 20 mHz to 2 kHz frequency range[J].Journal of Applied of Physics,2009,105(7):1-3.
[12]BOLL R,OVERSHOTT K J.Magnetic field sensors—Induction coil(search coil)sensors[M].VCH Publishers,1989:205-254.
[13]TUMANSKI S.Induction coil sensors—A review[J].Measurement Science and Technology,2007,18:R31-R46.
[14]王言章,程德福,王君,林君.基于纳米晶合金的宽频差分式磁场传感器的研制[J].传感技术学报,2007,20(9):1967-1969.WANG Yan-zhang,CHEN De-fu,WANG Jun,LIN Jun.Research of broad frequency difference magnetic field sensor based on nanocrystalline alloy[J].Chinese Journal of Sensors and Actuators,2007,20(9):1967-1969.
[15]邵英秋,程德福,王言章,张飞.基于磁反馈的宽频带磁传感器的研制[J].仪器仪表学报,2010,31(11):2461-2466.SHAO Ying-Qiu,CHEN De-fu,WANG Yan-zhang,ZHANG Fei.Development of broad frequency band magnetic field sensor based on flux feedback[J].Chinese Journal of Scientific Instrument,2010,31(11):2461-2466.
[16]林继鹏,王君,凌振宝,程德福.基于非晶态合金的感应式磁敏传感器的研究[J].仪器仪表学报,2004,25(2):195-198.LIN Ji-peng,WANG Jun,LING Zhen-bao,CHEN De-fu.Research for induction magnetic sensor based on amorphous alloy[J].Chinese Journal of Scientific Instrument,2004,25(2):195-198.
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