When the axis in the base of the angle measuring instrument rotates in one direction, the count increases, and when the direction of rotation changes, the count decreases. The counting is related to the initial position of the angle meter. When initializing the angle meter, its count value is set to 0. By calculating the angle of rotation, it is easy to determine the position and velocity. Mainly used to measure the ISO geometric angles of various cutting tools' main profiles, normal profiles, and longitudinal profiles. It is one of the essential instruments for teaching and experimenting in courses such as metal technology and cutting principles, as well as for sharpening knives in metalworking practice.

The angle measuring instrument is a key component of the aiming device in a certain control system. In previous control systems, most of them relied solely on the equipment operator's eyes to aim at the designated target and then make corresponding controls, which brought a series of problems, such as the operator's experience and the empty return of the aiming device turntable, which may seriously affect the accuracy of the aiming target, thereby seriously affecting the accuracy of the control system. In order to improve the aiming accuracy of the control system, an angle measuring instrument component has been added to the aiming device of the control system. The angle value obtained by the operator after aiming at the target can be accurately and quantitatively displayed on the operation panel, helping the operator to aim at the target more accurately. Therefore, the control accuracy of the control system has been greatly improved.

Application areas of angle measuring instruments:

1. Railway system: train manufacturing, improvement of control automation, detection of rail levelness, etc;

2. Water conservancy system: dam monitoring, etc;

3. Military automation: aircraft, ships, etc;

4. Industrial automation: metallurgy, chemical industry, petroleum exploration, light industry, coal, instrumentation, etc;

5. Automotive industry: four-wheel alignment, road control, etc;

6. Mechanical industry: horizontal condition and position of mechanical workbenches, lathes, and cutting workbenches;

7. Construction industry: pitch angle, roll angle, and tilt angle of construction equipment.

8. Other fields such as biology, medicine, and robotics require angle measurement and control.