Dual metering electronic platform scale main failure and solution

With the continuous development and improvement of China's national economy, it has also greatly promoted the development of China's electronic platform scale. At present, China's production of electronic platform manufacturers has also grown from the first few dozen to hundreds, and mainly based on automatic weighing. This paper is based on the dual-measurement electronic platform scale, and has carried out in-depth research and analysis. It is expected that China will provide some reference suggestions for the issue of dual-meter electronic scales in the future.

Foreword:

The dual-meter electronic scale is also a non-negligible position in the modern production and management activities of the enterprise. It is also the core condition for the overall industrial enterprise to improve the overall quality and management level, but only by data to guide production, monitoring and testing. It is very difficult to guarantee the quality of the electronic weighing instrument. Without accurate measurement, it is impossible to obtain a reliable data, and it is impossible to properly control the flow of the whole electronic platform process, let alone create a quality, Quality electronic weighbridge products come.

I. Overview of the composition of the dual metering electronic platform scale

For the present, the composition of each electronic platform itself is mainly divided into the following parts.

The scale body. In the role of the scale body, it mainly includes the load-bearing device and the limit device, and the load-bearing device also includes the weighing platform and the scale frame. The scale body is also designed to maximize The weight of the object weighed is transmitted to the mechanical system of the load cell in complete and accurate manner.

Load cell. The main function of the load cell is to accept the weight of the object itself by the object to be weighed, which changes the focus of the object itself to the power output, and its power and weight. There is a certain degree of functional relationship between them. In general, this relationship makes a linear relationship. 3. Measuring instrument. In the aspect of measuring instrument, the main function is to pass the power output of the whole load cell through gradual amplification, and finally process it, and then think of it in digital form. Speaking, also known as secondary instrumentation, mainly includes amplifiers and analog-to-digital converters. 4. Sensor power supply. In terms of sensor power supply, the main function is to measure the stability of the bridge feed power supply to the load cell, mainly through AC and DC, to regulate the entire power supply. It can also be called a warm current power supply.

Second, at present, the main faults in the dual-measurement electronic platform scale and the way to solve it

Generally speaking, in the main faults of the general electronic platform scale, it is usually divided into two types: one is a common fault and the other is a special fault, and the cause of the serious fault of the electronic scale is mainly This is because the product design is unreasonable and, during the use of the product, it is not suitable for natural reasons, such as in the installation and design process of the dual-meter electronic platform, in some of the more harsh environments. It is extremely easy to drop some substances into the gap of the whole scale or the gap next to it, which will seriously cause the range of the display of the dual-meter electronic scale to be less, or the inconsistency of the two ends. Because the object being weighed is blocked, the sensors on both sides are difficult to ensure accuracy and stability due to the pressure on the two sides, resulting in the specific data of the dual metering electronic weighbridge.

At this time, it is only necessary to properly remove some existing foreign objects and then continue to use them. Another reason is that there is some kind of irregular operation during the whole process of production and installation, and it is easy to see after observing the used dual-measurement electronic platform scale. In the process of measuring the weights below 30 tons, the result is very accurate.

However, once the weight is more than 30 tons, the error will be as high as 1t-5t. The result of this data is quite untrue, so in the process of checking it. There is no obligation under the weighing platform. There is no problem in the process of testing the resistance and voltage of the sensor. In time, after the instrument that has been weighed has completely replaced the new instrument, it still exists. At the end of this phenomenon, by adding a weight to the weighing platform and modulating the overall weight to the process of 32t, the error range for the measurement will suddenly increase, after removing 1t, In terms of measurement error, it will be reduced a lot. After careful inspection of the entire weighing platform, we found that there is a piece of iron with a thickness of about 10cm at the pad sensor. The channel steel of the platform is given to the landlord. When the empty scale is added, the remaining gap will be seriously caused. The measurement of small tonnage is more accurate. , And in the face of some measurements on large tonnage which is complete with a deviation of.

Another reason for the failure of the dual-meter electronic platform is that the components of the electronic weighing instrument have a certain degree of defects. For example, when the dual-meter electronic weighbridge is in a state of instability, In the case of a situation, one of the good solutions is to re-attach the entire sensor's excitation line, usually it is most suitable to make two compensation lines, and then, the four lines that existed before. On the six lines, it is better to improve its signal, so as to solve the problem of numerical instability of the dual-meter electronic weighing instrument to the maximum extent. In addition, another major cause of this phenomenon, that is, where the connection box is connected, may be caused by water ingress and related factors, when knowledge needs to be blown dry, The party can effectively solve its fault and continue to invest in normal work. For the judgment of the occurrence of such a fault, it is necessary to pass relevant test techniques, for example, in the process of processing numerical instability, in the above-mentioned text, several important reasons are mentioned After the elimination, the reasonable use of the multimeter to fully measure the resistance between the excitation line of the entire dual-meter electronic weighbridge and the compensation line and the shield line on the relevant signal line, once the signal and the shield line The resistance between the two is only about 30 ohms. After the whole main line is extracted, the signal and the wire are fractured because the original strength is gradually typed, which will inevitably cause the short circuit to occur. In this case, it is only necessary to replace the original main line, and then it can be effectively solved.

In summary, in order to effectively enhance the life of the entire dual-meter electronic weighbridge, it is necessary to strengthen the emphasis on using it in a normal environment. Not only that, but also need to be enhanced. For the dual metering electronic weighbridges, prior to the use of some relevant operating instructions, the maintenance and inspection of the dual-meter electronic weighbridges are regularly scheduled.

Third, the conclusion, however, whether it is for the electronic platform that has just been installed, or for the electronic platform that has been used for a long time, it will cause problems to varying degrees, resulting in no It can be used in normal measurement, but the platform manufacturers only have to summarize the relevant experience, and these problems can be easily solved.