How to judge the quality of the angle sensor? How do new people buy angle sensors correctly? What precautions? How do the novices judge the quality of the angle sensor?

1, frequency response characteristics
The frequency response characteristic of the angle sensor determines the frequency range to be measured. It must maintain undistorted measurement conditions within the allowable frequency range. In fact, the response of the sensor always has a certain delay, and the shorter the delay time, the better.
The frequency response of the sensor is high, and the measurable signal frequency range is wide. Due to the structural characteristics, the inertia of the mechanical system is large, and the frequency of the signal that can be measured by the low frequency sensor is low.
In dynamic measurement, the response characteristics should be based on the characteristics of the signal (steady state, transient, random, etc.) to avoid over-fire error.

2, the choice of sensitivity
Generally, in the linear range of the angle sensor, it is desirable that the sensitivity of the angle sensor is as high as possible. Since only the sensitivity is high, the value of the output signal corresponding to the measured change is relatively large, which is advantageous for signal processing. However, it should be noted that the sensitivity of the sensor is high, and the external noise that is not related to the measurement is easily mixed in, and is amplified by the amplification system, which affects the measurement accuracy. Therefore, the sensor itself should be required to have a high signal-to-noise ratio, and the plant disturbance signal introduced from the outside is reduced.
The sensitivity of the sensor is directional. When the measurement is a single vector and its directivity requirements are high, other sensors with small sensitivity should be selected; if the measurement is a multi-dimensional vector, the cross sensitivity of the sensor is required to be as small as possible.

3, stability
The ability of a sensor to remain unchanged after a period of use is called stability. In addition to the structure of the sensor itself, the factors affecting the long-term stability of the sensor are mainly the environment in which the sensor is used. Therefore, in order to make the sensor have good stability, the sensor must have strong environmental adaptability.
In addition, before selecting an angle sensor, investigate the environment in which it is used, and select an appropriate sensor according to the specific use environment, or take appropriate measures to reduce the impact of the environment.

4, linear range
The linear range of the angle sensor is the range in which the output is proportional to the input. In theory, within this range, the sensitivity remains constant. The wider the linear range of the sensor, the larger the range and the guaranteed measurement accuracy. When selecting a sensor, when the type of sensor is determined, it is first necessary to see if its range meets the requirements.