The traditional building equipment monitoring is to monitor the equipment in real time through the monitoring room with a dedicated monitoring element. Its main drawback is that it consumes a lot of human resources, and it also increases the cost of monitoring. And now some real-time online building monitoring systems are implemented using acquisition cards and pc mode. The cost of the pages is very expensive, and the equipment used is also very large. It does not apply to decentralized monitoring and some of the more odious places. Nowadays, based on these problems, we must use intelligent routers and other related technologies to conduct design analysis of building monitoring and control systems. 1, remote equipment monitoring system principle The Internet-based remote device monitoring system designed in this paper mainly consists of four parts: building equipment or industrial equipment, PLC control cabinet, intelligent router, and remote server. 2, smart router design This article will use Cortex-A8 embedded boards to model smart routers. The software design of the intelligent router mainly includes the embedded linux operating system, web server lighttpd, database mysql, modbus protocol, and monitoring device application programs. The main hardware on the smart router includes the processor, 3G module, Ethernet port, serial port and SD card slot. 2.1 Data Acquisition Modbus as a device real-time data transmission protocol, serial port and Ethernet port as the data collection method, the final data transmitted to the server through the Ethernet or 3G network, and data stored in the server database. The data obtained from the device will all be stored in the SD card of the smart router, and the data uploaded to the server needs only a key part of it. When you need to get all the detailed data, you can also remotely log in to the smart router for viewing. This will not only greatly reduce the capacity of the server to store data, but also greatly reduce the bandwidth required by the client. 2.2 Main software instructions Open Wrt is an open source linux distribution with excellent extensibility and powerful networking components for all types of embedded devices and routing devices. Open Wrt's file system is writable, meaning that users can add as much functionality as they need without recompiling the entire system firmware. 3.1 Adding New Devices to Be Monitored Each device to be monitored is uniquely identified by its own device name, device ip, device id, and device port. The system also generates a unique hash value for the device. In data monitoring, the system also stores the hash value as the unique identifier of the device. The purpose of this is to make it possible to modify the device information in the future without modifying too many data tables. 3.2 Alarm processing The monitoring system designed in this paper is applied to most of the monitored devices. In addition to monitoring the switching status of the light bulb, which is only on and off, it is also necessary to monitor such numerical values ​​as temperature and humidity. Compared with the numerical value, the switch quantity will be relatively simple to monitor. The monitoring of the numerical value is slightly more complicated because the value of the numerical value is smooth, so that the value may fluctuate up and down from the alarm value in the case of external disturbance. Eventually the system will appear to alarm without warning. Conclusion This article focuses on the basic principles of system work, and describes in detail the main part of the system hardware circuit design and system software. Compared with traditional IT operation and maintenance services, Internet-based IT operation and maintenance services have more advantages. With the continuous deepening of Internet applications, smart routers will be more widely used and developed. The design of remote monitoring systems in this paper will also play a positive role and role. battery pack current sensor,battery current sensor function,battery current sensor test,allegro current sensor Shanghai Zhilong Electronic Technology Co.,Ltd , https://www.zhilongsensor.com
3, part of the software system to achieve