Sick Sensor - Introduction to the 7 performance indicators of the sensor

Create Date: 2024-8-30 12:03:23|Source: SICK/Sick

1. Linearity: refers to the degree to which the actual relationship curve between the output and input of the sensor deviates from the fitting straight line. Defined as the ratio of the maximum deviation between the actual characteristic curve and the fitted line over the full scale range to the full-scale output.

2. Sensitivity: Sensitivity is an important indicator of the static characteristics of the sensor. It is defined as the ratio of the increment of the output to the corresponding increment of the input that caused the increment. S is used to indicate sensitivity.

3. Hysteresis: The phenomenon that the input and output characteristic curves of the sensor do not coincide during the change of the input amount from small to large (positive stroke) and input quantity from large to small (reverse stroke) becomes hysteresis. For input signals of the same size, the output signals of the forward and reverse strokes of the sensor are not equal, and this difference is called the hysteresis difference.

4. Repeatability: Repeatability refers to the degree of inconsistency of the characteristic curve obtained by the sensor when the input quantity changes continuously in the same direction for many times in the full scale.

5. Drift: The drift of the sensor refers to the change of the output of the sensor with time under the condition that the input amount remains unchanged, which is called drift. There are two reasons for drift: one is the structural parameters of the sensor itself; The second is the surrounding environment (such as temperature, humidity, etc.).

6. Resolution: When the input of the sensor slowly increases from a non-zero value, the output changes observably after exceeding a certain increment, and this input increment is called the resolution of the sensor, that is, the minimum input increment.

7. Threshold: When the input of the sensor starts to increase slowly from the zero value, the output changes observably after reaching a certain value, and this input value is called the threshold voltage of the sensor.

Sick Sensor - Introduction to the 7 performance indicators of the sensor

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