Angular metrology is an important part of geometric metrology.According to the spatial position of the plane, the plane Angle can be divided into: the horizontal Angle (or azimuth Angle) in the horizontal plane, and the vertical right Angle (or inclination Angle) in the vertical plane. The spatial Angle is the combination of the horizontal Angle and the vertical Angle.According to the range can be divided into circular Angle and small Angle;According to the nominal value can be divided into fixed Angle and arbitrary Angle;According to the composition unit, it can be divided into line Angle and plane Angle.According to the formation mode, it can be divided into fixed Angle and dynamic Angle. Fixed Angle refers to the Angle of components processed or assembled, and the Angle position restored to the static state after the rotation of the instrument.Dynamic Angle refers to the Angle of an object or system in the process of motion, such as the Angle between the satellite orbit and the earth's equatorial plane, the axis Angle drift when the spindle of precision equipment rotates, and the real-time Angle signal output by Angle measuring equipment when it moves with a certain angular velocity and angular acceleration.
Inclination sensor is also called inclinometer, inclinometer, level and inclinometer. It is often used to measure the change of horizontal Angle of the system. The development of the level instrument from the simple bubble level instrument in the past to the electronic level instrument now is the result of the development of automation and electronic measurement technology.As a testing tool, it has become an indispensable important measuring tool in bridge erection, railway laying, civil engineering, oil drilling, aviation and navigation, industrial automation, intelligent platform, mechanical processing and other fields.Electronic level is a very accurate tool for measuring small angles. It can be used to measure the inclination of the measured plane relative to the horizontal position, the parallelism of the two parts and the verticality.