The composition of electronic truck scale is complex, including weighing platform, weighing sensor, junction box, weighing display control instrument, etc. It is mainly based on the gravity effect when the truck on the weighing platform is placed on the weighing platform, and the weighing sensor will deform after receiving the gravity transmission from the weighing platform, so that the strain gauge bridge will lose balance and output an electrical signal, which will be amplified and then converted into a digital signal via A/D, After the quality signal is normalized, the CPU directly displays the quality value of the truck and transmits it to the computer for processing. In the application of electronic truck scale, once the weighing error exists, it will directly affect the accuracy of material measurement data. Therefore, it is necessary to strengthen the electronic truck scale.

The eccentric load test is an important part of the electronic truck scale weighing. By applying weights to N sensors of the electronic truck scale, it is ensured that they are evenly distributed in the whole bearing area beyond the limit, so as not to affect the effect of the eccentric load test. Under the eccentric load test, the error caused by the change of the position of the weight to be measured on the scale platform should not exceed the weighing range, which is affected by factors such as the sensitivity of the weighing sensor, resulting in the eccentric load error. However, the actual sensitivity of the key materials such as the elastomer of the load cell and the resistance strain gauge is often different, even affecting the output signal under the same load, resulting in errors. In order to effectively reduce the bias load error, the electronic truck scale can be properly treated. Connect the potentiometers to different sensor branches, and properly correct the resistance value to ensure the stability and balance of the signal output of different branches. With the continuous improvement of modern social science and technology, the digital electronic truck scale takes the digital weighing instrument as the basic platform in the adjustment of the bias load error, and automatically compensates the A/D value output by the digital sensor through the software parameters, so as to accurately correct the sensor output error.