Distributed remote temperature monitoring and acquisition system based on CAN bus

摘要

In modem industrial and agricultural production, the working temperature change reflects the operating status of equipments and change of many physical characteristics, so the temperature is an important parameter, which needs to be monitored, especially in the severe environment. The workers can make right judgments and operation by a temperature monitor. So it is the most effective and most economical means of equipment safety monitoring. A temperature remote monitoring embedded system platform is designed in the paper. And the embedded microprocessor AT91SAM7X256 is used as CPU of the system. The system realizes real-time remote data collection monitoring and storage through protocol data conversion of the CAN bus and RS232 bus of the distributed temperature acquisition node. At the same time, the system realizes the remote temperature monitoring and control through TCP/IP Industrial Ethernet Web. The system platform can be applied to certain equipments of the power system, intelligent agriculture remote monitoring, intelligent furniture monitoring, intelligent warehouse monitoring and so on. The temperature measurement accuracy is within 0.5°C. The system is reliable and stable. And there are not communication failures. So it has very good social prospects.