基于LPC1788的乘客报警器设计

Design of Passenger Alarm Based on LPC1788

针对各种交通工具人流量大、空间相对密封等安全隐患,设计一款基于LPC1788的乘客报警器。该系统利用麦克风和扬声器实现听说,通过以太网总线与主机进行信息传达,并集成了噪声检测功能,实时调节扬声器输出音量大小。核心功率变换单元采用模块化设计,电源模块与车体“地”采取安全隔离措施,安全性高。

In view of the potential safety hazards such as large capacity,closed space,in this paper,the passenger alarm based on LPC1788 is designed.In this design,the microphone and the speaker are used to achieve hearing and speaking,and the Ethernet bus to complete the communication with the host,and also the integrated noise detection to implement real-time adjustment of speaker volume.Modular design is adopted in the core power conversion unit,and the power supply module is separately placed from the vehicle body to ensure the safety.