On the development of a two-dimensional inclination sensor based on magnetic field distribution

This paper presents the development of a two-dimensional inclination sensor system based on geometrical analysis of spatial distribution of magnetic field. The location of a button magnet tilted by its base is measurable using three ratiometic, linear Hall-effect sensors. The Hall sensors sense magnetic field strength and produce proportional voltage outputs. The output signals are digitalized and processed according to the developed conversion model. An experimental rig was setup to validate the feasibility of the sensor system. The results show that the system is capable of detecting two-dimensional inclination with a promising accuracy and linearity. However, there are some zones that the sensor system may fail or come out with exponential measurements.