Design of pyroelectric infrared wireless alarm system

A wireless alarm system based on pyroelectric infrared detector was designed and used to realize wireless information transmission and remote alarm function.The basic ideas of the design scheme and key circuits of the system were also presented.In addition,the circuits that can amplify,transmit and receive electrical signals were optimized so that the cost of such a system was reduced and the practicability was improved.The system is suitable for domestic security protection with properties of ease of use and stability.