Embedded Network Controller and Application in CNC System

2011 ◽  
Vol 403-408 ◽  
pp. 2424-2427
Author(s):  
Hong Zhang ◽  
Xing Hui Zhang ◽  
Jian Hua Zhang
Keyword(s):  
Can Bus ◽  
Embedded Software ◽  
Windows Ce ◽  
Cnc System ◽  
Development Platform ◽  
Embedded Network ◽  
Network Controller ◽  
Distributed Measurement ◽  
And Control ◽  
Measurement And Control

For the inherent deficiencies of fieldbus control system, the thesis is designed and implemented a kind of embedded network controller with AT91RM9200 which is a 32bits microprocessor, multiple Ethernet interfaces and field bus interface for embedded network controller, the establishment of a Windows CE-based embedded software development platform. Embedded Network Controller to the CNC system, CAN bus and DSP by matching the system to improve timeliness and reliability, a remote distributed measurement and control and communication purposes.

A Clock Soft Synchronization Method Based on CAN Bus and Synchronization Error Analysis

2012 ◽  
Vol 542-543 ◽  
pp. 699-704
Author(s):  
Ji Jiao ◽  
Fei Fan Chen
Keyword(s):  
Control System ◽  
Can Bus ◽  
Propagation Delay ◽  
Synchronization Error ◽  
Measurement And Control System ◽  
Synchronization Method ◽  
Transmission Distance ◽  
Distributed Measurement ◽  
And Control ◽  
Measurement And Control

Based on information pipeline technology, a clock soft synchronization method used in distributed measurement and control system is proposed. Using a separate information pipeline, the synchronization information is broadcasted to nodes in the distributed measurement and control system by synchronization node every message transaction cycle time, and all nodes automatically synchronize the local clock after receiving it. We analyze the theoretical synchronization error and verify this clock soft synchronization method in CAN bus. The theory analysis and experimental results indicate that the synchronization error mainly consists of propagation delay error, drift error and CAN loop delay error, and it increases linearly with the increasing of transmission distance.

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