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 introduces the wireless induction location-inspecting principle, and presents a new method to improve the precision of location, and provides the schematic circuit diagrams.

Based on the comparison and analysis of worldwide application, we improved on the position detecting methods of wireless induction, and designed a new interlocking system of three vehicles.

Analysis of 2ASK mod-demodulation in new radio induction system;

Principle and implementing of position detection at fixed station by induction radio

The basal principle of the induction radio and the characteristics of the induction communication are emphasized.