Research And Design Of The ANTI-THEFT Device Based On Bluetooth Technology4.0

With the development of science and technology, people’s living standard has been greatly improved, and also the pace of life becomes faster and faster, thereby the phenomenon of losing something often occurs around us, and even lost children. According to statistics in2012, The U.S.consumer lose＄30billion directly in the economy because of the loss of smart phone that can not be found; each year about20million children has been lost in china, and also600,000cases has yet not been given up. At this time, the anti-theft device came into being. As technology continues to update, the anti-theft device has more strong anti-interference and better stability, and also the function becomes more and more.The design of anti-theft device in this paper follows the previous emission suppression principle, the radio wave is sent from the slave machine. For example, the master machine will not give an alarm when it receives the signal comes from slave machine, but if the distance between the master and slave machine exceeds a predetermined distance, the master cannot receive the signal from the slave machine, and will send an alarm immediately to user.The anti-lost alarm uses the new Bluetooth technology4.0, the technology is a collection of traditional technology, high-speed technology and low-power technology, the study of this technology is in its infancy at home and abroad, but the technology is energy-saving in the application, the battery which has a size as small as a coin can be used as long as six months, and also is safe and cheap, so becomes a good choice for anti-lost alarm. In the hardware, the design uses the WX2530common sensor board which is developed by embedded technology company for intelligent transceiver module, the intelligent module uses CC2540with small size, low power consumption and low cost; In the software, the design writes the code in C language in IAR Integrated Development Environment. At last, the design achieves all function. Low complexity, low power, low cost and so on are fully taken into account in the design.In this paper, first of all, the background of Bluetooth technology is introduced, and briefly describes the characteristic and application of low-power Bluetooth; Secondly, the paper introduces the BLE technology architecture, topology, work status, work roles and equipment classification briefly, and then the protocol stack and stack layers in the low-power Bluetooth are introduced detailedly. Thirdly, the paper introduces the core part of the thesis:the hardware and software design of anti-lost device. At last, the codes are burned into the chip of master and slave device respectively, and also the system has been tested. In the end, a summary of the research work is given, and the lack of work in the future also is introduced. In summary, the anti-lost device which is designed in the paper provides a effective solution for preventing the loss of something or children.