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What are the future trends of industrial automation?

Intelligence and Digitalization: The continuous maturation and application of technologies such as the Internet of Things (IoT), big data, and artificial intelligence will drive automated production lines to achieve a higher level of intelligence and digitalization. For example, by utilizing machine vision and large language models, the efficiency of the manufacturing process can be enhanced. Through the real-time analysis and processing of production data, intelligent decision-making can be realized, the production process can be optimized, and production efficiency and product quality can be improved.

 

Flexible Production: With the increasing diversification of future market demands, flexible production will become an important trend. By adopting technical means such as modular design and reconfigurable production lines, enterprises can quickly adjust the production process and resource allocation to meet the production needs of different products and achieve multi-variety and small-batch production.

 

Green and Environmental Protection: With the global enhancement of environmental awareness, green and environmental protection have become an inevitable requirement for the development of automated production lines. Enterprises need to pay attention to issues such as energy consumption and waste emissions during the production process, adopt energy-saving and environmentally friendly equipment and processes, reduce the impact on the environment, and achieve sustainable development.

 

Domestic Substitution: The technologies of domestic brands are continuously iterated and improved, and their advantages in terms of performance, reliability, and cost-effectiveness are gradually emerging. The process of domestic substitution is accelerating, and the market share of domestic enterprises in the automated production line market will be further increased, reducing the dependence on foreign brands.

 

Customized Production: The rapid changes in market demand require automated production lines to have a high degree of flexibility and adaptability, and customized production has become an important development trend. Enterprises need to provide personalized automated solutions according to the needs of different customers to meet their specific production requirements.

 

Rapid Technological Upgrades: The automated production line industry is faced with the challenge of rapid technological updates. Both domestic and foreign enterprises are strengthening technological innovation to improve the performance and efficiency of their products. For example, some enterprises have developed intelligent manufacturing solutions based on self-developed chips, promoting the deep integration of industrial robot control algorithms and production scenarios. Enterprises need to continuously invest in research and development to maintain their technological leadership and adapt to market changes.

Application Cases of PLC in Industrial Automation

Intelligent Transformation of Automobile Parts Assembly Line
Project Background: The original rigid production mode of an automobile parts assembly line made it difficult to meet the market demand for personalized products. The customer required the realization of mixed-line production of multiple product varieties and an overall 20% increase in the production line’s efficiency.
System Solution: Siemens S7-1500 series PLC is used as the core controller. Through the PROFINET fieldbus, it connects on-site devices such as servo drives, vision systems, and intelligent sensors to construct a three-layer network structure.
Implementation of Core Functions: Flexible process flow control is achieved through the product model judgment and process parameter loading program; adaptive beat control is realized by using a dynamic beat algorithm, which automatically adjusts the operation speed according to the complexity of the workstation tasks and the status of upstream and downstream workstations; a digital twin model of the equipment is established, edge computing nodes are deployed, and AI algorithms are applied for analysis to achieve equipment status monitoring, including real-time monitoring of the operation status, predictive maintenance reminders, fault diagnosis and handling, and equipment utilization statistics. Data collection and analysis are also carried out through a hierarchical collection strategy to realize functions such as production quantity statistics, quality analysis, energy consumption calculation, and trend prediction.
Implementation Effect: The comprehensive efficiency of the production line has increased by 25%, the product switching time has been shortened by 80%, the defective product rate has been reduced by 50%, and the equipment failure rate has been reduced by 35%.

 

Automated Warehouse Management System
Project Background: Modern warehouse management requires efficient material handling and inventory management, and an automated system is needed to complete tasks such as goods storage, retrieval, stacking, and handling.
System Solution: The automated storage and retrieval system consists of stacker cranes, conveyor belts, storage units, and PLC. The conveyor system is composed of multiple conveyor belts and sorting devices. The PLC controls the start and stop of the motors to achieve the conveying and sorting of goods, and is also responsible for controlling the actions of the stacker cranes.
Implementation of Core Functions: When goods are stored, the PLC controls the conveyor belt to send the goods to the stacker crane, and the stacker crane stacks the goods on the designated shelves according to the storage location; when goods are retrieved, according to the retrieval instructions, the PLC controls the stacker crane to take the goods from the designated shelves and transport them to the designated location through the conveyor belt; during automatic sorting, the PLC controls the sorting equipment to distribute different categories of goods to different outbound areas. Through dynamic scheduling, the PLC optimizes the utilization of storage space according to real-time inventory information; through precise timing control, it ensures the coordinated operation of equipment such as conveyor belts and stacker cranes; the HMI system allows operators to view the inventory status in real-time and manually intervene in abnormal situations.
Technical Analysis: Function Block Diagram (FBD) programming is used to clearly express the control logic between equipment such as stacker cranes and conveyor belts. The precise detection of the goods’ positions is fed back to the PLC through sensors to ensure that each item of goods is correctly stored or retrieved.

 

Intelligent Lighting Control System
Project Background: In the construction of smart cities, automated control of lighting in public places is required to optimize energy use, reduce energy consumption, and improve management efficiency.
System Solution: The system architecture includes input devices such as light sensors and motion sensors. The PLC is used to receive the input signals from the sensors and execute the control program, and the output devices are lighting equipment such as streetlights and indoor lights.
Implementation of Core Functions: When the light sensor detects changes in external light, the PLC controls the switching of streetlights; when the motion sensor detects the passage of vehicles or pedestrians, it automatically turns on the lights of certain road sections; the PLC also controls the switching of streetlights through a timer, and cooperates with the sunrise and sunset schedule to ensure a reasonable lighting time. Through reasonable sensor control and time scheduling, energy-saving control is achieved. At the same time, the PLC program has programmable flexibility, allowing the lighting strategy to be adjusted according to different seasons, weather, or special events. Operators can also remotely monitor and adjust the working status of the lighting system through the HMI or cloud platform.
Technical Analysis: Structured Text (ST) programming is suitable for more complex dynamic control strategies based on time, light, and motion. The PLC needs to be integrated with multiple sensors to obtain external information in a timely manner and make responses.

Power module application precautions

1, very light load use

The general module power supply has a minimum load limit, which varies from manufacturer to manufacturer, generally about 10%, because the load is too light when the energy storage components continue to flow difficult current discontinuity, resulting in unstable output voltage, which is determined by the working principle of the power supply itself. However, if the user does have light load or even no-load use, the most convenient and effective way is to add a certain fake load, about 2% of the output power, which can be preset by the module manufacturer before the factory, or the user can install appropriate resistance outside the module as the load. It is worth noting that if you choose the former, the module efficiency will be reduced. However, some circuit topologies have no minimum load limit.

2, multiple output power distribution

When selecting the power supply of multiple output modules, pay attention to the power distribution among different outputs. Taking dual-path products as an example, there are generally two types: one is dual-path balanced load, that is, the size of the dual-path current is the same; The other is unbalanced load, that is, the load current of the main and auxiliary roads is not the same, the main road is large, and the auxiliary road is small. For this product, it is recommended to choose the ratio of the power of the auxiliary road to the main road is 1/5 ~ 1/2, and the voltage stability of the auxiliary road is guaranteed in this range (can be within 5%), otherwise the voltage of the auxiliary road will be high or low. On the other hand, if the dual load is not the same, try not to choose the balanced load module power supply, because this power supply is designed specifically for symmetrical load, if the load is not balanced auxiliary voltage accuracy is not high

3. Try to reduce the temperature rise of the module power supply

The operating temperature of the components in the module directly affects the service life of the module power supply. The lower the device temperature, the longer the service life of the module. Under certain working conditions, the loss of the module power supply is certain, but the temperature rise can be reduced by improving the heat dissipation conditions of the module power supply, thus greatly extending its service life. For example, the module power supply above 50W must be installed with a radiator, the larger the surface area of the radiator, the more conducive to heat dissipation, and the installation direction of the radiator should be as favorable as possible to the natural convection of air, and the power above 150W can also be installed in addition to the radiator fan forced air cooling. In addition, in places where the ambient temperature is high or the air circulation condition is poor, the module must be derated to reduce power consumption, thereby reducing temperature rise and extending service life.

4, reasonable installation to reduce mechanical stress

The leading mode of the module power supply is all metal pins. The module power supply is connected to the external circuit and the metal pin is connected to the inner circuit of the module power supply by welding. In some special occasions, the mechanical vibration strength is relatively large, especially the radiator must be installed on the power supply of the high-power module, which is more serious. Although the general potting thermal insulating rubber inside the module power supply can play a better buffer protection role on the components, the solder joint may not be able to withstand strong vibration stress and fracture, resulting in the failure of the module power supply, then it is necessary to take other fixing and buffering measures on the basis of welding. For example, you can use a fixture or bolt (for the module with a screw hole) to fix the module with the chassis, large circuit board and other parts with good vibration performance, and put some elastic materials in the middle of them to buffer the stress generated by vibration.

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