rion electronic compass, also known as three-dimensional electronic compass, is small in size, high precision and good stability; main push series: hcm inclinometer surveying and mapping high precision series, dcm inclination compensation series, ddm dynamic inclination compensation series; rion electronic compass is widely used in robots , vehicle autonomous navigation, horizontal hole and vertical hole measurement, underwater exploration, aircraft navigation, equipment maintenance, navigation system, speed measurement, simulation system, gps backup, car compass, virtual reality and other fields.