如何判断电梯传感器的选用是否合理（How to determine the elevator sensor selection is reasonable）.doc

如何判断电梯传感器的选用是否合理（How to determine the elevator sensor selection is reasonable） How to determine the elevator sensor selection is reasonable.Txt How to determine the elevator sensor selection is reasonable? South Xun Guang day elevator knowledge blog: how to determine the elevator sensor selection is reasonable? 1. Determine the type of sensor in accordance with the measurement object and the measurement environment To carry out a specific measurement work, we should first consider the principle of the sensors used, which need to analyze a variety of factors before we can determine. Because, even if it is to measure the same physical quantity, also has a variety of sensor principle for selection, sensor which principle is more suitable, the need according to the characteristics and conditions for the use of the measuring sensor is considered following some specific problems: the range of the size of the measured position of the sensor; volume measurement; way contact or non-contact; extraction method of signal, cable or non contact measurement; sensor source, domestic or imported, the price can bear, or developed. After considering the above issues, you can determine what type of sensor to choose, and then consider the specific performance indicators of the sensor. 2, sensitivity choice Usually, in the linear range of the sensor, the sensitivity of the sensor is expected to be higher. Because only the sensitivity is high, the value of the output signal corresponding to the measured change is relatively large, which is beneficial to signal processing. However, it should be noted that the sensitivity of the sensor is high, and it is easy to be mixed with the external noise which is not measured. It also amplifies the system and affects the measurement accuracy. Therefore, the sensor itself should have a high signal-to-noise ratio, so as to minimize the interference signal from the outside. The sensitivity of the sensor is directional. When the measurement is unidirecti