The truck scale has also become a weighbridge. It is a new type of electronic weighing instrument that can quickly and intuitively display high-accuracy tools for industrial and commercial, warehousing and cargo station trade measurement. With the continuous improvement of China's trade level, the reliability, accuracy and scientificity of electronic truck scales have an extremely important impact. Therefore, how to promote the improvement of the overall electronic truck scale quality, maintenance personnel in the maintenance process to find problems and timely resolution, and must make better countermeasures.
1 Electronic truck scale verification problems in the maintenance process
The existence of problems in the electronic truck scale verification process will have a greater impact on the accuracy of the tool measurement. This is mainly reflected in the zero drift problem of the electronic truck scale and the problem of the electronic truck scale eccentricity. The following is an analysis of the problems in the maintenance process of the electronic truck scale from several aspects.
1.1 Zero drift problem of electronic truck scale
The zero drift problem of electronic truck scales is an important factor affecting the accuracy of truck scale measurement. For example, we can find that the instrument with the maximum weighing of 20t has a minimum division value of 2kg and uses three 10t sensors. After repairing it, a zero drift was found, that is, the display number of the electronic truck scale was increased in one direction. And by repairing another sensor with a minimum division value of 5kg and using 6 30t sensors, it is found that the instrument has a zero drift problem after maintenance. This problem is mainly caused by the continuous beat of the irregular number, and the staff is removing one. After only the sensor, it is found that there is still a zero drift problem. Through the above analysis, it can be estimated that the occurrence of the zero drift problem should be related to the index value of the sensor.
1.2 Electronic truck scale eccentricity problem
At present, with the continuous improvement of China's economic level and the continuous improvement of people's living standards, the market trade demand is also increasing simultaneously. This requires that the number of verification points in the trade process needs to be continuously improved, thus causing the problem of electronic truck scales being over-loaded. Appearance. It is well known that eccentric load debugging is an extremely important part of the maintenance of electronic weighing instruments. If there is a problem of eccentricity in this process, the problem of weighing imbalance will become more serious. In addition, when the scale value of the scale exceeds the maximum verification index value of the sensor, it will fundamentally violate the principle of sensor error distribution of the scale, which will greatly reduce the measurement accuracy of the electronic truck scale.
2 Countermeasures for problems in the process of repairing electronic truck scales
In the electronic truck scale verification and maintenance process, the corresponding countermeasures can effectively promote the effective improvement of the electronic truck scale verification maintenance efficiency, which is mainly reflected in the zero drift problem of the electronic truck scale, and the electronic truck scale eccentricity problem And other countermeasures. From the following aspects, the countermeasures for the problems in the maintenance process of electronic truck scales are analyzed.
2.1 Countermeasure of zero drift of electronic truck scale
In the process of solving the zero drift problem of the electronic truck scale, the importance of the corresponding countermeasures is self-evident. For example, through maintenance practice and practice analysis, we can make the following analysis of the causes of the zero drift problem. First of all, it may be that the number of divisions of the electronic truck scale is too high and exceeds the maximum number of verification scales of the sensor. For example, some electronic truck scales find that the index is 3-4 times of the number of sensor divisions during the maintenance process, resulting in The zero drift problem of the electronic truck scale, secondly, if the influence of the sensor of the electronic truck scale on the zero temperature is relatively uniform and changes in the same direction, this indicates that there is a phenomenon of mutual offset, so that the zero point of the electronic truck scale can be promoted. More stable. Therefore, during the process of proposing the zero drift problem of the electronic truck scale, the staff should pay attention to checking whether there is dust on the bridge of the weighing and checking electronic truck scale or whether the materials and debris are stuck in the weighing bridge and Whether there is any debris on the belt conveyor, the effective occurrence of these checks can promote the cause of the zero drift problem to be effectively searched, thereby promoting the effective countermeasures and effectively solving the zero drift fault.
2.2 Electronic truck scale eccentricity out of tolerance problem countermeasures
The upper position has already stated that the eccentric load debugging is an extremely important part in the maintenance process of the electronic weighing instrument and will lead to a decrease in the measurement accuracy of the electronic truck scale when the eccentricity error problem occurs. Therefore, in order to promote the effective solution of the problem of the eccentricity of the electronic truck scale, the staff promotes the effective countermeasures in the work. For example, when repairing the analog sensor electronic scale, the staff should first open the junction box and make effective adjustment of the corresponding potentiometer on the wiring board, and the staff can adjust the impedance sensitivity of the sensor further by reasonable adjustment of the potentiometer. Therefore, the purpose of adjusting the eccentricity error is finally achieved and the effective solution of the eccentricity problem of the electronic truck scale is promoted. In addition, in the process of solving the problem of the electronic truck scale eccentricity error, the staff can use the potentiometer in the junction box to reasonably adjust the excitation voltage of the connected sensor, so as to make the connected transmission The output signal of the device can change synchronously with the change of the input voltage. Therefore, the purpose of adjusting the eccentric load is better achieved. In addition, in the process of solving the problem of the electronic truck scale eccentricity error, when one or two angular eccentricity errors are out of tolerance, the staff should pay attention to placing the weight on the corresponding corner and then performing the next potentiometer adjustment. In summary, in the process of analyzing and proposing the problem of the electronic truck scale eccentricity error, the staff should proceed from a variety of angles to make reasonable countermeasures, so as to promote the effective solution of the electronic truck scale eccentricity problem. .
3 Conclusion
With the continuous improvement of China's trade level and the continuous improvement of the fixed maintenance level of electronic vehicle safety inspection, the corresponding countermeasures in the fixed maintenance process of electronic vehicle safety inspection promoted the effective solution of the fixed maintenance problem of electronic vehicle safety inspection. Therefore, the staff should have a clear understanding of the existing problems in the maintenance work of the electronic vehicle scale inspection, and on this basis, through the maintenance practice, the overall level of the fixed maintenance of the electronic vehicle scale inspection can be effectively improved.
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