Abstract: Aiming at the shortcomings of the complex design and wiring of the cultural relics fire alarm system and the high installation and maintenance cost,a wireless fire alarm system based on LoRa is proposed. Using the new LoRa modulation technology and 433 MHz center frequency point, and combined with the character⁃ istics of cultural relics, built a wireless fire alarm system. Through the low- power design of the fire detection alarm node,the electromagnetic field software FEKO is used to analyze the antenna matching simulation and multipoint control mode,which can effectively reduce the system power consumption,and extend the communication distance. By demonstration project the system was tested,which provided technical support for the optimal design of the wireless fire alarm system for cultural relics.

Key words: LoRa technology, heritage building, fire alarm, FEKO software