According to the basic principle of alternative current field measurement (ACFM),the alternative current field sensor was designed,which was made up of drive coil and induction coil.

Both coils are excited by time-sharing sinusoidal signal,and three induction coils whose axes are orthogonally mounted are sealed in the microcapsule.

Three test methods,including two-accelerometers method,four-accelerometers method and geomagnetic induction coil method,for measuring rocket rotation angle are put forward in this paper.

This paper analyzes the shortage of the original plant for vacuum getting and measurement instructure and introduces the work done for the improvement -mainly the special power source makingto replace the induction coil.

The paper introduces the method of utilizing inductorium to demonstrate receiving circuit tune, transformation of surging circuit frequency, electromagnetic wave generating, launching and receiving.

This article introduces the method of using inductorium to do the demonstrational experiment of Hertzian waves which has a good experimental effect and is interesting and is able to play a better role of aid teaching.