When there is a problem with the sensor, do you know what went wrong and what is the cause of the problem? There are four main types of sensor problems, namely complete failure problems, fixed error problems, drift error problems, and accuracy degradation problems.
The problem of complete failure
When the sensor suddenly fails during measurement, and the measurement value has been a constant, this kind of problem is a complete failure problem.
Error issues
It refers to a constant constant difference between the measured value of the sensor and the real value, and this kind of problem is the error problem.
Drift issues
It is a problem in which the difference between the measured value and the real value of the sensor changes over time.
Accuracy decreases
The measurement of the sensor can become worse and the accuracy will be lower. When the accuracy level is reduced, the average value of the measurement does not change, but the variance of the measurement changes.
Among them, the fixed error value problem and drift problem are not easy to find, so when the problem occurs, it will cause a series of unpredictable problems, so that the control system can not function normally for a long time, which is also more troublesome. Therefore, we must check the equipment regularly, and if we find problems, we should deal with them in time.
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