Research And Design Of Ozonizer's Remote Monitor And Control System Based On CAN Bus

With the widely application of the ozone in the sterilization, the Ozonizer industry has a large development. But the output of single ozonizer is low, so the waterworks and the sewage farms always use several ozonizers at the same time. There is no case of the successfull control system of the ozonizers until now. In this background, the article researchs the control system by using the CAN bus.The ozonizer is a complex system by itself which has many analog and digital parameters when running. And it does not have the capacity to hang up the CAN bus. So we have to meet three conditions if we want to realize the system. They are the physics condition to let the ozonizer connect with the CAN bus,the protocol condition to realize the CAN bus communication and the software condition. This text expands surrounding the three conditions.Firstly, I design the smart node using the LPC2129 of ARM7 for the ozonizer connecting with the CAN bus. This smart node includes the CAN controller and the transceiver. The main ability of the node is data collection,LCD display,sound alarming,connecting with the CAN bus,controlling the state of the ozonizer. Using the node, the user can watch the running information in the field as while as the data was sent to the main node.Secondly, design the protocol of the CAN communication according to the standards of CAN2.0B. Define the ID according to the sender; Send the combination of the different parameter in the smart nod; Use the different data to deliver the different order in the host computer. At the same time, set the acceptance filter of the LPC2129. Then it can only receive the broadcast frames and the special frames. In the end, design the control software of the host computer using the MCGS. There I mostly introduce the part of the data processing. The part includes the data transform and the changing of the aim database. Change the database from the little capacity to the big one SQL Server 2000,optimize and maintain the aim database. The database can run well and longer from this way.To sum up, we can form a complete remote monitor and control system of the ozonizer with the mentioned above.