Research and design of an Anti Omissions System Based on Single-chip Processor

Anti omissions system of nursery school bus based on single-chip processor, which is aimed at resolving security incidents of children omissions. The system consists of microcontroller, infrared microwave double sensors, GSM SMS module and buzzer. It adopted Microwave double infrared, which improve detection accuracy greatly, avoid false reports caused by human factors and natural factors, solve the problem of children left in the school bus to maximum extent, and have broad application prospects. Introduction Recently, the accidents of missing children in buses caused by negligence of bus drivers and teachers have occurred frequently. Aiming that, a few places have taken certain measures to prevent, such as installation of infrared in the car, using the IC card and so on. However, because of a mount of false reports caused by human factors and natural factors, it can not achieve social needs well and be unable to resolve the remaining issues. Obviously, preventing children left the car accurately is very important for us. The overall design of the system The system mainly consists of three parts, initiating unit, detecting unit, the response unit. Start unit includes PT2272 remote control transmitter module and PT2262 signal receiver modules (Based on the existing automobiles are used the remote locking manner parked vehicle lock); Detection unit include radar microwave sensors and infrared pyroelectric sensors(Based on the characteristics of a microwave sensor not easily influenced by external temperature or the like, and the characteristics of the infrared sensor detects the human body); Response unit include buzzer and GSM SMS module. The design principle is as follows. Power module is divided into two parts, and one part is used to provide 5V/2A power supply for the GSM module, the other is used to provide 5V power supply for the microcontroller; PT2272 signal receiving module detects real-time signals emitted by PT2262 remote control transmitter module, and transfer corresponding level signal to the microcontroller by VT and D0, D1 ports; Pyroelectric infrared sensors and microwave radar sensor detects occupants case and transfer information to the microcontroller through OUT; Microcontroller control GSM SMS module to send a distress message by the commands send by the serial port TXD; MCU control buzzer timely. Diagram of anti omissions system of nursery school bus based on single-chip processor is shown in Figure 1.1. International Conference on Information Sciences, Machinery, Materials and Energy (ICISMME 2015) © 2015. The authors Published by Atlantis Press 1393