CAN-bus bus introduction
CAN-bus is one of the most widely used fieldbuses in the world. It was originally designed as a serial data transmission network for ECU (Electric Control Unit) and is now widely used in European high-end cars. in. In recent years, due to the extremely high reliability and real-time nature of the CAN-bus, the CAN-bus has begun to enter data communication applications in various industries in China, and was established in 2002 as a national standard in the field of power communication products.
The CAN-bus network uses ordinary twisted pair cables as the transmission medium. It adopts a straight-line topological structure. A single network line can connect at least 110 nodes. When the communication distance does not exceed 40 meters, the data transmission rate can reach 1Mbps, and the farthest communication distance can be. Up to 10 km (using the standard CAN transceiver PCA82C250/251 chip).
The CAN-bus network is a multi-master network, and bus access is based on the priority of the information frame, which greatly improves the performance of the system. The CAN bus adopts a short-frame message structure and has good real-time performance, and has perfect data check and error handling. Error detection mechanism, in addition, the CAN bus node will automatically leave the bus under severe error and have no effect on the bus communication. In the CAN-bus network, data transmission and receiving and hardware detection are completed by the CAN controller hardware, which greatly enhances the anti-electromagnetic interference capability of the CAN-bus network.
The scope of application of CAN-bus: It can be applied to occasions with a large number of nodes, transmission distance within 10 kilometers, and high security requirements; it can also be applied to mechanical control networks with very strict real-time and security requirements.
At present, the domestic automobile and elevator industry is a typical field of CAN-bus applications. Industrial control, intelligent buildings, coal mining equipment and other industries have also been widely used.
Construction Machinery Industry Development
The CAN-bus network uses ordinary twisted pair cables as the transmission medium. It adopts a straight-line topological structure. A single network line can connect at least 110 nodes. When the communication distance does not exceed 40 meters, the data transmission rate can reach 1Mbps, and the farthest communication distance can be. Up to 10 km (using the standard CAN transceiver PCA82C250/251 chip).
The CAN-bus network is a multi-master network, and bus access is based on the priority of the information frame, which greatly improves the performance of the system. The CAN bus adopts a short-frame message structure and has good real-time performance, and has perfect data check and error handling. Error detection mechanism, in addition, the CAN bus node will automatically leave the bus under severe error and have no effect on the bus communication. In the CAN-bus network, data transmission and receiving and hardware detection are completed by the CAN controller hardware, which greatly enhances the anti-electromagnetic interference capability of the CAN-bus network.
The scope of application of CAN-bus: It can be applied to occasions with a large number of nodes, transmission distance within 10 kilometers, and high security requirements; it can also be applied to mechanical control networks with very strict real-time and security requirements.
At present, the domestic automobile and elevator industry is a typical field of CAN-bus applications. Industrial control, intelligent buildings, coal mining equipment and other industries have also been widely used.
Construction Machinery Industry Development
Due to the increasing use of advanced technologies such as embedded computers, network communications, microprocessors, and automatic controls, the performance and integration of construction machinery control systems have been greatly improved, and the convenience and safety of construction machinery have been improved. A substantial increase.
In the construction machinery based on the centralized control method, on the one hand, due to the use of multiple ECU units, the communication between the various ECUs becomes more and more complicated, which inevitably leads to more signal connection lines, making the control system installation and maintenance procedures cumbersome. The reliability of the operation and the flexibility of the application have been reduced and the difficulty of maintenance has increased. On the other hand, in order to increase the utilization of signals in the system, a large amount of data information is required to be shared among different control units, and a large number of control signals are required. It also needs real-time exchange. The traditional centralized control system has lagged behind the needs of modern communication functions in construction machinery.
In the construction machinery based on the centralized control method, on the one hand, due to the use of multiple ECU units, the communication between the various ECUs becomes more and more complicated, which inevitably leads to more signal connection lines, making the control system installation and maintenance procedures cumbersome. The reliability of the operation and the flexibility of the application have been reduced and the difficulty of maintenance has increased. On the other hand, in order to increase the utilization of signals in the system, a large amount of data information is required to be shared among different control units, and a large number of control signals are required. It also needs real-time exchange. The traditional centralized control system has lagged behind the needs of modern communication functions in construction machinery.
Application of CAN-bus in Construction Machinery
Whether in Europe, the Americas, or Asia, CAN-bus technology has a wide range of product examples in the field of construction machinery, and it also has good prospects for development.
CAN-bus Bus Application Status in Construction Machinery
CAN-bus Bus Application Status in Construction Machinery
CAN-bus is particularly suitable for the interconnection of various electronic units in construction machinery because of its good performance. With the introduction of CAN-bus technology, distributed control systems based on CAN-bus in construction machinery replace the existing centralized control systems. Traditional complex harnesses are replaced by CAN-bus: various controls in the system The devices, actuators, and sensors are connected via a CAN-bus bus. The cables are small, easy to install, and low cost. The system design is more flexible, the signal transmission reliability is high, and the anti-interference ability is strong.
At present, the application of CAN-bus technology in engineering machinery is more and more common. Some famous international large-scale construction machinery companies such as CAT, VOLVO and Liebherr have widely used CAN-bus technology in their products, which greatly improves the reliability, detectability and maintainability of the whole machine, and at the same time improves The level of intelligence. In China, the CAN-bus bus control system has also begun to be widely used in the control system of engineering vehicles, and is being gradually applied in the construction machinery industry.
CAN-bus Network in Construction Machinery Control System
At present, the application of CAN-bus technology in engineering machinery is more and more common. Some famous international large-scale construction machinery companies such as CAT, VOLVO and Liebherr have widely used CAN-bus technology in their products, which greatly improves the reliability, detectability and maintainability of the whole machine, and at the same time improves The level of intelligence. In China, the CAN-bus bus control system has also begun to be widely used in the control system of engineering vehicles, and is being gradually applied in the construction machinery industry.
CAN-bus Network in Construction Machinery Control System
The control system of the construction machinery needs to complete the control and monitoring of various sensors, actuators, engines, and transmissions in the system. Different construction machinery products, their control system composition is not exactly the same, but the composition of the control system is basically similar.
The application of CAN-bus can make the control system function of engineering machinery have good scalability, and it is easy to realize centralized monitoring and management of each subsystem. In addition, the application of the CAN-bus bus makes the user's use, maintenance and fault diagnosis more flexible and convenient. For example, when the crane is in the factory debugging, the factory computer system can access its control system through the CAN-bus bus and record and save the debugging data. The original reference data for repair at the time of the fault.
With the continuous application of CAN-bus in construction machinery, the reliability, detectability, maintainability and intelligence level of construction machinery will be greatly improved.
With the continuous application of CAN-bus in construction machinery, the reliability, detectability, maintainability and intelligence level of construction machinery will be greatly improved.
Relying on the powerful professional development team and the advanced technology of the complex distance and inclination sensors, COMA Technology has always been dedicated to the application and promotion of CAN-bus inclinometers in the construction machinery industry, providing customers with more high-quality solutions.
Lower Frequency Transformer,Low Voltage Current Transformer,Low Frequency Audio Transformer,Low Frequency Drying Transformer
Guang Er Zhong(Zhaoqing)Electronics Co., Ltd , https://www.geztransformer.com