摘要
失真度是检验检波器性能的一项重要指标 ,随着现代地震勘探技术的不断发展 ,对检波器性能的要求越来越高。文章在介绍了速度型检波器的结构和工作原理后 ,阐述了检波器中产生均匀磁场的必要条件及均匀磁场对检波器失真度的影响。通过对比两种磁路结构的检波器 ,讨论了磁路的几何尺寸和磁性材料的选用 ,并比较了这两种磁路的磁通密度及谐波失真的测试结果 ,说明了在检波器磁路设计中 。
Distortion is one of the important specification which affects geophone′s performance.The paper introduces the working principle and structure of velocity type geophones,expounds the prerequisite for producing uniform magnetic field and the influence of the uniform magnetic field on geophone′s distortion.The paper also discusses the geometric sizes of magnetic path and the choice of magnetic materials,and contrasts the test results from the magnetic field flux density of two kinds of magnetic path and harmonic distortion of geophone by contrasting two kinds of magnetic path′ geophones.All of above show that if the uniform magnetic field adopted in the design of the geophone can reduce harmonic distortion in the output signal of the geophone.
出处
《石油仪器》
1998年第1期32-34,55,共3页
Petroleum Instruments
关键词
地震勘探
地震波
检波器
均匀磁场
失真度
seismic exploration,seismic wave,detector,uniform mangnetic field,harmonic distortion,distortion
