Abstract: In view of the wireless inclinometer widely used in the directional drilling at present,the fluxgate of measuring magnetic field intensity in probe,had the inaccurate measuring problem in a environment with magnetic disturbance,desingned a kind of new probe with FOG instead of fluxgate,FOG is a sensor measuring the palstance,not affected by the magnetic field;studied a FOG revolving location device,and expounded some design points of the internal circuit board in probe.In test the probe measured successfully the deviation angle,azimuth angle,tool face angle,etc,the log parameters were same with or without magnetic interference.The result showed that this probe were not affected by the magnetic environment,can be used in coal freezing with a group of holes and metal drilling.

Key words: wireless inclinometer, probe, FOG, revolving location device, bipolar A/D, L298, ±15V power