A Control System of Large Roll Cotton Packing Line

Abstract

The invention relates to a large-roll cotton packaging line control system which is characterized in that the control system comprises a single-chip microcomputer, a power supply module, an 8255 expansion module, a manual / automatic switching module, a communication module, a DC motor driving module, a signal detection module, a relay module and a man-machine interaction module. The single-chip microcomputer is electrically connected with the power supply module, the 8255 expansion module, the manual / automatic switching module, the communication module and an input channel of the DC motor driving module; an output channel of the DC motor driving module is electrically connected with an external DC motor; the power supply module provides power for the whole control system; the signal detection module comprises a proximity switch sensor, a magnetic switch sensor and a first optoelectronic isolator, wherein the proximity switch sensor and the magnetic switch sensor are electrically connected with the 8255 expansion module through the first optoelectronic isolator; and the relay module comprises a second optoelectronic isolator and a driving circuit, wherein one end of the driving circuit is electrically connected with the 8255 expansion module through the second optoelectronic isolator.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to a control system for a large roll cotton packaging line. Background technique [0002] The large roll cotton packaging line is a production line for large roll packaging, which realizes a series of functions such as labeling, tape application, peripheral sealing, and end sealing of large rolls. The existing large roll cotton packaging line control system has the following problems: [0003] 1. Inconvenient operation: it is mainly manifested in that most of the processes in the production line of large roll cotton are completed manually. It is relatively difficult to realize, and the labor workload will increase relatively, which not only wastes production time, but also reduces production efficiency, and the personal safety of workers is also in danger. [0004] 2. Inconvenient management: Because the thickness of large rolls varies too much, it is likely to cause a d...

AI Technical Summary

Problems solved by technology

[0003] 1. Inconvenient operation: it is mainly manifested in that most of the processes in the production line of large roll cotton are completed manually. It is relatively difficult to realize, and the labor workload will increase relatively, which not only wastes production time, but also reduces production efficiency, and the personal safety of workers is also in danger.

[0004] 2. Inconvenient management: As the thickness of large rolls of cotton changes too much, it is likely to cause a decrease in detection reliability and stability

The main performance is that each process requires corresponding devices. Due to the complexity of the on-site environment and the accumulation of time, the mechanical structure is aging. The difficulty is relatively large, and non-professionals cannot distinguish the location of the fault, which will not achieve the ideal control purpose, and even cause the equipment to fail to work normally or cause accidents, so generally only professionals can carry out on-site debugging

[0005] 3. High cost: At present, the existing packaging methods are basically completed manually or semi-manually and semi-automatically. It requires manual tape, label, plastic film bag, end seal, and iron frame

Only a small part of the packaging line uses PLC as the core of the control system, but PLC is expensive, so the cost of the control system is high

[0006] 4. Inconvenient maintenance: mainly manifested in the fact that the material thickness of the large roll cotton in the large roll cotton packaging line can often reach 2-75mm, the diameter of the large roll cotton can reach close to 1m, and the width of the roll material can reach about 1.5-2m, and the center of the roll material small barrel diameter

Difficult to maintain even with PLC as controller

Because the control program is written according to the process sequence, once a fault occurs or a certain process task is changed, professionals need to rewrite the program, which is costly; and all the wiring of the controller is directly connected to the components. When the controller When the components are damaged and need to be replaced, they must be dismantled and rewired, which affects the use time and greatly consumes financial resources and energy

[0007] 5. Difficult to update: Generally, the update of PLC as the controller lags behind, and the scan cycle is too long

Neither can send information parameters to the controller, nor can it accept the control instructions sent by the controller, and cannot be updated in time, resulting in economic losses

This kind of processor is designed for all fixed control objects, and it is written according to the required process sequence during programming. There may be spare control input and output points for some functions, but its reserved function points are also Targeted, not easy to expand universally, thus unable to meet the needs of subsequent function improvement and optimization

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