Characteristics and measurement range of the sensor

Basic characteristics of the sensor:

Knowing from the function of the sensor itself, it is the part directly connected with the measured object and the window for information input. The basic characteristics of the sensor refer to the characteristics of the relationship between the output and input of the sensor, which are generally divided into static characteristics and dynamic sensors. The static characteristics of the sensor refers to the static input signal, the sensor’s output and the input

1. Measuring range (Yrs)

Each sensor has a certain measurement range. If the measurement is performed beyond this range, it will bring a lot of raw information that can be provided. The accuracy of the detection is completely related to the accuracy of the reaction within a certain range. Therefore, it must have certain basic characteristics, and understanding and mastering its basic characteristics are the basic conditions for the correct selection and use of sensors. There are two main types of state characteristics. When the measured does not change with time or changes very slowly with time (often called static signal), a series of static parameters are used to describe its static characteristics. When the measured changes quickly over time (often called dynamic signals), a series of dynamic parameters can be used to describe its dynamic characteristics.

2. Static characteristics

Mutual relations. At this time, the input signal has nothing to do with time, and the output has nothing to do with time. The relationship between output and input can be expressed by an equation without time. Non-linear undetermined constants can be calibrated by actual measurement data. In practice, you can also use x as the abscissa and y as the ordinate, and use the measurement results to draw a characteristic curve to characterize the relationship between output and input. From the analysis of the results of multiple measurements, it can be seen that the relationship between the output and input of any sensor will not fully meet the required linear or non-linear relationship. To measure the static characteristics of the sensor, some important indicators must be used to determine, such as measurement range and linearity. , Hysteresis, repeatability and sensitivity, etc. The measurement error may even damage the sensor. Generally, the measurement range is determined in a certain linear region or within a certain range of guaranteed life. In practical applications, the measurement range of the selected sensor should be larger than the actual measurement range to ensure the accuracy of the measurement and extend the life of the sensor and its circuit.