Error self-compensation method of electronic belt scale for cigarette production

Abstract

The invention relates to an error self-compensation method of an electronic belt scale for cigarette production, and belongs to the technical field of cigarette weighing. Comprising the following steps: (1) additionally installing a displacement sensor and an offset sensor; (2) defining initial positions of a displacement sensor and a conveyor belt offset sensor; (3) acquiring calibration data of the sensor; (4) establishing an artificial neural network which comprises one hidden layer, one input layer and one output layer; (5) using the data obtained in the step (3) as a training set to train a neural network; (6) carrying out artificial neural network deployment; and (7) verifying the error automatic compensation effect. The weighing process of the electronic belt scale is modeled by using the artificial neural network, and the model is deployed in the edge computing equipment, so that error self-compensation of the electronic belt scale can be realized, accurate weighing of the electronic belt scale is ensured, small difference between the actual blending proportion and the theoretical weight of the formula is ensured in the tobacco shred making and blending process, and the uniformity of the smoking flavor of cigarettes can be ensured.

Description

technical field [0001] The invention belongs to the technical field of cigarette weighing, in particular to an error self-compensation method of an electronic belt scale for cigarette production. Background technique [0002] The electronic belt scale conveyor and the electronic scale PC control cabinet or control box are matched to form the electronic belt scale. It is a dynamic weighing device, which is widely used in the silk production line and the threshing and redrying line. Flow control of various tobacco materials, display of accumulated weight and ratio control of different materials. In cigarette production, there are mainly the following types of electronic belt scales: [0003] a) Metering type - measure the accumulated weight of the material, and transmit the instantaneous flow signal to the next-level equipment. [0004] b) Control type - control the material flow in a balanced manner, so that the material can pass through according to the set flow. [0005]...

AI Technical Summary

Problems solved by technology

[0009] (1) Weighing gravity error, the largest source of weighing error in electronic belt scales, accounts for 85% of the total error of automatic weighing according to relevant literature, and the composition of gravity weighing error is complex and difficult to analyze

However, the main reason is that there is a difference between the material of the conveyor belt and the ideal rigid body, which will change accordingly when the material passes through, so that the load cell will receive an unexpected signal, and the conveyor belt will naturally sag for a certain distance between the two weighing rollers

[0010] (2) Speed ​​measurement error. Due to factors such as improper installation position and aging of the speed measurement wheel, the speed measurement point is inconsistent with the force point, random slippage occurs between the speed measurement wheel and the conveyor belt, or the speed of the upper and lower surfaces of the conveyor belt is uneven.

These can cause the speed sensor to output a different belt speed signal

[0011] (3) Signal processing error, theoretically, the hardware and software design of functional units such as multipliers, integrators or displays may affect the weighing results

Sometimes, due to the limitations of conditions, the belt scale is calibrated under static conditions, or the dynamic calibration is not standardized, resulting in calibration errors

[0013] At present, the existing mainstream technology mainly relies on regular calibration for error correction of electronic belt scales. However, if there is an unknown change in the electronic belt scale between two calibration cycles, it is very likely that the measurement will not be accurate enough, resulting in different formulations. The proportion of tobacco leaves is inconsistent with the formula, the inaccurate process flow leads to difficulties in process control, and the inaccurate weight leads to settlement disputes and other problems

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