Design Of Power Supply Monitoring System For Building Fire Equipment Based On Internet Of Things(IoT)

In view of the requirement for the fire protection equipment in the building to be in a working state,and to be able to understand the power situation in real time,the paper implements a building fire protection power equipment monitoring system based on the Internet of Things.The thesis first analyzes and studies the power supply state measurement methods for the online measurement requirements of power equipment power status,compares and analyzes the AC signal effective value algorithm,and proposes a multi-cycle equal interval algorithm to achieve the design of the power AC effective value sampling measurement The corresponding software algorithm is designed and verified by simulation in a computer.Secondly,in order to realize the real-time monitoring of the power state,a monitoring device with an ARM microprocessor as its core was designed.The 32-bit embedded system uses the internal ADC module of the processor to monitor the power supply in real time,uses its digital input to detect the external device linkage input signals in real time,and generates linkage signals according to fire protection requirements,and records the operating condition data to the internal FLASH of the microcontroller.At the same time,the monitoring information is transmitted to the centralized host computer in real time through the RS485 bus,or the detection information is sent to the cloud server through the wireless communication NB-IoT module,which completes the upper management system for viewing the monitoring data information on the web page and mobile phone at the same time.Experimental tests show that the monitoring system’s real-time measurement error for AC voltage signals is not greater than 0.5%,and the current signal measurement error is not greater than 1.5% + 3,which meets the measurement requirements.The test of the system linkage control signals meets the relevant fire protection requirements;the system communication is stable,The fault response time is short,which meets the actual use requirements and has certain application value.