Abstract:

The principle of plane electronic compass is introduced, and the possible error and the error sources are analyzed. The deflection caused by local magnetic influence, for both the source and components, is analyzed. Based on the study, a deflection equation is obtained. The least square method is used for compensation, resulting in a maximum azimuth error of less than 1° so that the accuracy is increased. The results indicate that the methods of compensation can be widely used in similar applications.

Key words: endoscopic robot; electronic compass; error analysis; deflection compensation; least square method