基于示波器的地磁场强度的测量

The Measurement of Magnetic Field Intensity Based on Oscilloscope

本文利用模拟示波器,根据运动在示波管中的电子在不与之平行的磁场中受到洛伦 磁力会偏转等原理,测得电子在荧光面板向上的偏转量x1,向下的偏移量x2,以及电子管到荧 光面板的距离L,求出地磁场强度.此方法物理现象明显,对于了解地磁场有一定的意义.

In this topic, according to the principle that the electron moving in oscilloscope tube will deflect u nd er the influence of Lorentz force in the magnetic field that is not parallel to it, the upward deflection and the downward deflection of the electron on fluorescent screen as well as the distance between vacuum tube and fluorescent screen has been tested by dint of the analog oscillo - scope to work out the geomagnetic field intensity. This physical phenomenon is remarkably obvious and of some significance to un-derstanding geomagnetic field.