Design And Realization Of Remote Monitor System For Fire Fighting Equipments Power Supply

So far,the existing fire-fighting equipment power monitoring systems on the market present the poor real-time systems,alarm delay longer,high communication error rate,poor stability,high rate of false positives and other issues.In this paper,we design a fire-fighting equipment power remote monitoring system,using STM32F103VCT6 as the control core,and CAN bus as the communication,so as to realize the monitor host and the monitor terminal to display the monitored fire-fighting equipment supply over-voltage,under-voltage,over-current,leakage current,open circuit,short circuit and phase alarm status.In the same time,monitor host can remotely trip,reset and set up surveillance terminal alarm threshold.Fire fighting equipment power remote monitoring system consists of three parts,the monitoring host,monitoring terminal devices and communication systems,according to GB 28184-2011 "fire-fighting equipment power monitoring system".The main content of the paper is the design of the monitoring host,monitoring terminal software and hardware,and the liability of the monitoring host and monitoring terminal communication.Hardware circuit design system includes the design of functional modules of the monitor host and monitor terminal and reliability of PCB.Monitoring host function module includes STM32 minimum system micro-controller,STC15 smallest single-chip system,power management,LCD display,matrix keyboard and CAN communication module and so on.Monitoring terminal modules include STC15 smallest single-chip systems,digital displays,electric quantity gathering,buttons and CAN communication module and so on.Reliability of PCB board design mainly includes component selection,reasonable wiring,high-frequency electromagnetic interference suppression,grounding design.System software design consists of two parts,monitoring host and monitoring terminal.Monitoring host STM32 micro-control software uses theμC / OS-II real-time operating system,which has the advantage of highly real-time,small footprint,high reliability,preemptive priority and so on.After the introduction of μC / OS-II system,program will be coded by way of tasks,reducing programming complexity,while improving the stability of the system.Monitoring terminal STC15 SCM software using the modular design concept,including the main program,the button program,digital display program,the amount of electrical fire power acquisition program and CAN communication program design.The fire-fighting equipment power remote monitoring system in this paper uses the CAN communication bus,which has the advantage of communication reliability,high data rates,error detection,automatic exit nodes,easy developing.In terms of security design,CAN bus uses the DC-DC power supply,to ensure the stability of CAN communication circuit.CAN transceiver and controller use the opto-isolation techniques to prevent interference.Finally,this system uses NUP2105 chip to protect the CAN bus of lightning protection,ensuring the CAN communication work goes well.Finally,the overall system test is performed,including the stand-alone basic functional test and the on-line debugging of the monitoring host and monitoring terminal.The system is stably and continuously working for seven days,and each function is normal.Meanwhile,this paper gives a comparison of monitor terminal acquisition voltage data and actual voltage data,and then calculate the errors.According to the system function test and experimental data,the result shows that this system meets the requirements of national standards.