Checkweigher principle and error causes

2024-08-30

The weighing bridge of the electronic belt checkweigher is cleverly embedded in the solid frame of the conveyor. Whenever the material slides leisurely over this precise weighing bridge, the metering roller is like a keen detective, accurately capturing the mass of the material on the belt, and converting this weight into a voltage signal that the weighing sensor can understand through the clever lever principle. This signal is a direct reflection of the material mass and is proportional to the weight carried by the belt.

At the same time, the speed sensor is also working silently. It is like a guardian of time, accurately recording the running speed of the belt conveyor and passing this key information to the weighing instrument. Inside the instrument, a precise calculation is taking place. It cleverly combines the speed signal with the weighing signal. Through integral processing, it instantly reveals the instantaneous flow rate and cumulative total amount of the material, allowing the data to speak and making management more accurate.

However, the accuracy of the electronic belt checkweigher is not impeccable, and its error sources are complex. First of all, the scale itself is an important link that cannot be ignored. Subtle changes in temperature, small fluctuations in belt speed, dynamic adjustment of load, and even the vibration of the scale itself and interference from the external environment may all become the "black hands" that affect accuracy.

Furthermore, the belt checkweigher itself is also a hotbed of errors. The vibration of the rollers, the physical properties of the belt (such as rigidity, thickness, shape, material), the installation quality, and the subtle effects of the tensioning device on the belt tension all invisibly challenge the accuracy of the scale.

In addition, environmental factors should not be ignored. Fluctuations in temperature and humidity, magnetic fields and vibrations, like the invisible hands of nature, quietly change the readings of the scale.

Finally, every detail of on-site installation and daily maintenance may become the source of error. The technical level of the installer, the installation quality and the accuracy of debugging, the choice of installation location, and every operation during the calibration process are directly related to the accuracy and stability of the scale. Therefore, improving the professionalism of installation and maintenance is the key to reducing errors and ensuring the accurate operation of the scale.