The requirement for the static characteristics of the German HBM sensor is that when the input is 0, the output is also 0For a certain size of input, the size of the output according to some correspondence is also determined. The static characteristics represent the input-output relationship of the German HBM sensor when the measured values are in a steady state, and its main indicators are sensitivity, linearity, stability, hysteresis, etc.
2. Sensitivity limit.
There are two main reasons for the existence of sensitivity boundaries. On the one hand, when the input change is very small, this change is absorbed by the sensor and cannot be reflected at the output. It's like there is always a gap between the rack and the pinion when mated, if δxEquivalent to this void, then this δx cannot be transferred. On the other hand, there is noise in the output of the sensor, and if the output of the sensor relative to the input is less than the noise level, it is difficult to distinguish the useful signal from the noise. The amplitude of the noise varies according to the statistical law, and the root mean square value is often used to evaluate the noise level, and if the minimum input value is not added (so that the corresponding output value is comparable to the noise level), no useful output value can be obtained, which gives the lowest sensitivity boundary.
3. Linearity.
MostlyGerman HBM sensorIt is designed according to a certain proportion of input and output, but in fact it cannot be realized. For a nonlinear static characteristic, linearity is used to describe how much the static characteristic curve deviates from a fitting straight line.