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Multiple weighing sensor system fault response measures
HENGQUASI:2022-02-06 14:08:25

The greater the number of weighing sensors, the greater the likelihood of failure. The user wants the whole weighing system to be able to weigh if one of the sensors fails. In order to meet this requirement, the following are the temporary remedial measures for the fault of the weighing sensor, the example of the fault treatment of the weighing sensor and the application of the three-meter scale.
For the weighing system, only a single weighing sensor system is very few, most of the weighing system uses multiple weighing sensors. The greater the number of weighing sensors, the greater the likelihood of failure. Users hope that the failure of the weighing sensor in the weighing system will have as little impact on the system as possible, but usually it is difficult to do so. For example, you want the whole weighing system to be able to weigh if one of the sensors fails, even if the accuracy is slightly less. Because even if there is a spare weighing sensor, from the warehouse to change to work, always delay a period of time, if the warehouse does not have a spare, temporary order, then not three or five months?
Since the weighing system with multiple weighing sensors usually uses parallel method rather than serial method of sensor output signals, that is to say, in the parallel method, if the forces of multiple sensors are uniform and the output signals are roughly similar, then in truth, the failure of one sensor should not have much impact. Of course, remove the signal cable from the faulty sensor and disconnect it from the system. If the weighing system uses the sensor output signal series method, because the signal wiring of the faulty sensor is removed, the amplitude of the total output signal is greatly reduced, and the weighing system can only be put into operation after adjusting the zero point and range of the system.
The weighing instrument normally displays the display value of the main weighing scale, while the display value of the two groups of auxiliary weighing scale is compared online in real time. If the difference between the display value of the two groups of auxiliary weighing scale is too large, beyond the set range, the output signal of the weighing sensor of the two groups of auxiliary weighing scale is compared to judge the faulty weighing sensor. At the same time, the display value of the non-fault auxiliary weighing scale is selected to replace the display value of the main weighing scale, so as to ensure that the hopper scale can still be weighed reliably when one of the weighing sensors is faulty. In this case, the system does not need to shut down, and the equipment can continue to run. We can imagine that if one of the weighing sensors fails, its fault is difficult to find in the initial stage and it is very difficult to diagnose. When a weighing sensor fails, it will take a long time to replace it, which will adversely affect the normal operation of the bin scale. If the bin scale can realize the above idea, it can realize the self-diagnosis of the weighing sensor fault, and after the failure of a weighing sensor occurs, the bin scale will automatically switch to the auxiliary weighing scale, still can realize the automatic weighing, the reliability and intelligent level of the weighing system will be greatly improved.


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