The Design Of Building Electromagnetic Detection System Based On The Internet Of Things

With the rapid development of technology and the economy, more and more electrical products are used in building.We are enjoying the convenience of the modern science and technology, at the same time, we will also be affected by the harm of electromagnetic radiation. These electromagnetic waves have the character of colorless, odorless, invisible, and it can penetrate any material including the human body so that it is ubiquitous and difficult to detect.Electromagnetic wave through the human body has done a lot of harm to people’s health, this potential threat for a long time often leads to irreversible damage.Electromagnetic radiation detection equipment currently on the market cannot be widely adopted in the small users due to reasons such as price, performance and so on. With the development of computer technology, sensor technology and wireless network transmission technology, the Internet of things technology have been mature, the integration of the Internet of things technology and intelligent buildings has become the development trend of building control. In this paper, we consider the characteristics of buildings and plan to build a platform based on Internet of things, the hardware of Internet of things platform is mainly composed of nodes, routing nodes, terminal nodes and coordination; Antenna about detecting pollution electromagnetic wave is blended in among them, the Internet of things platform can not only realize real-time detection building electromagnetic radiation, and can build other ports on WSN platform, such as the quality of the air quality detection, security monitoring, intelligent household control and so on. Control program part mainly depends on the IAR(IAR Embedded Workbench).The main task of this work completed is as follows:First of all, the design of the detection antenna. Statistical electromagnetic pollution frequency band of building, choose the most pervasive and the largest radiation pollution electronics as the considering object. Design a detection antenna with performance of omnidirectional and high gain.Secondly, the overall scheme of buildings electromagnetic detection. Choose CC2530 chip as the core chip, and design hardware circuit including the coordinator node, routing nodes and terminal node. Design a inverted F antenna to replace existing antenna iot node to overcome the phenomenon of electromagnetic phenomenon of depolarization and increase the electromagnetic signal reception.Finally, design the procedure of various nodes by the IAR software platform, respectively. Build a small mesh network based on ZigBee2007 protocol stack,and make use of the equipment to test its correctness and the usabilityThrough the test, standing wave ratio, bandwidth and gain of detection antenna meet design requirements; mesh network structures can effectively operate to achieve effective data transmission of terminal node to PC, it can rise to the fact of early warning and detection and the electromagnetic wave of excessive to remind users.