会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 3. 发明授权
    • Fluxgate magnetometer circuit with earth's field elimination
    • 磁通门磁力计电路与地球场消除
    • US4293815A
    • 1981-10-06
    • US901778
    • 1978-05-01
    • Jerry B. WestJohn L. KretzschnarBing-Fai Fung
    • Jerry B. WestJohn L. KretzschnarBing-Fai Fung
    • G01R33/04G01V3/26
    • G01R33/045
    • A flux gate magnetometer system utilizes three independent flux gates for measuring the three mutually orthogonal components of the earth's magnetic field. A sensor for each flux gate includes a ring core with a toroidal winding as the drive winding and a differential winding for sensing the difference in saturation due to the earth's flux linkages in the core. The operation of the flux gate magnetometer system is stabilized by a second harmonic servo type null circuit. The output of the differential sense winding is beat with a signal twice the frequency of the drive signal and in phase with the sensor output. This demodulated signal is the error signal for an integration stage. The integration stage drives a high impedance current source which sums into the flux gate sense winding and eliminates the effect of the earth's field in the sensor. An error signal is generated only when the high impedance current source does not null the earth's flux linkages in the core. The flux gate magnetometer system provides a means for determining the components of the earth's magnetic field for use in a digital mineral logging system.
    • 磁通门磁力计系统利用三个独立的磁通门来测量地球磁场的三个相互正交的分量。 用于每个磁通门的传感器包括具有环形绕组作为驱动绕组的环形磁芯和用于感测由于磁芯中的地球磁通的饱和度差异的差动绕组。 磁通门磁力计系统的工作由二次谐波伺服型零电路稳定。 差分检测绕组的输出以驱动信号频率的两倍的频率拍摄,并与传感器输出同相。 该解调信号是积分级的误差信号。 积分级驱动一个高阻抗电流源,它与磁通栅极检测绕组相加,消除了传感器中地球场的影响。 仅当高阻抗电流源不使核中的地球磁通关闭时才产生误差信号。 磁通门磁力计系统提供了一种用于确定用于数字矿物测井系统的地球磁场分量的方法。