Design And Implementation Of Automatic Bus Stop Reporting System

This paper designs an automatic bus stop announcement system with automatic voice broadcasting and arrival information display.The main purpose of this system is to solve the hidden danger of manual stop announcement and improve the working efficiency of drivers.Compared with the traditional system,this design has better anti-jamming ability,and has better compatibility with the peripheral equipment of the bus.At the same time,an optimized distance algorithm is proposed.Firstly,this paper studies some problems of bus stop announcement and the development status of bus stop announcement system at home and abroad,analyzes the actual demand of bus stop announcement,designs the overall framework of the system according to the analysis results,mainly divided into voice acquisition and playback module,master control module,positioning module,storage module and bus.Five parts of vehicle peripherals.Then,the functional requirements of the voice acquisition and playback module are analyzed,and the composition framework of the voice acquisition and playback module is designed,which includes analog amplifier module,audio amplifier module and AD/DA module of STM32 voice acquisition and playback.The working principle and circuit connection mode of each module are given.Aiming at the shortcomings of traditional manual station announcement system,this paper designs the positioning module of automatic station announcement system,and gives the working principle and circuit connection mode of the positioning module.At the same time,the storage module is added to store the site location information,display information and audio data,and the specific circuit design of the storage module is given.In addition,the bus peripheral equipment is used to realize voice broadcasting and site display,and the communication protocol between host and peripheral equipment is given.Also designed and implemented in this thesis are the software modules related to the system,including voice acquisition and playback,voice coding and decoding,communication interface and automatic station software.The software of voice acquisition and playback mainly includes the call of AD/DA module,the design of voice sampling rate and the setting of data buffer.The software design of speech coding and decoding mainly includes Speex audio compression and decompression call and audio data storage design.The software design of communication interface mainly includes SPI communication part and RS485 communication part.The software design of automatic reporting station mainly includes location information acquisition and processing,and automatic operation software.Finally,the system is tested in practice,and the test results of the same line are analyzed to prove the practicability of the system.