Research And Implementation Of Noise And Dust Supervision Device

Nowadays,people pay more and more attention to the atmospheric environment,and there is an urgent need for an effective means to monitor the environment.Traditional methods rely mainly on manual measurement to monitor dust and noise values,which usually consume a lot of manpower and material resources.However,they obtain less data,and can not summarize and analysis data automatically.Therefore,it is necessary to develop a device which has a low cost.The device should measure data continuously and its deployment should be flexible.With network technology,the device can make the data no longer fragmented,and the data can be effectively summed up and use.Meanwhile,human consumption is greatly reduced.The thesis studies and implements a noise and dust supervision device based on Arduino.Its main function is to collect noise and dust data.Then it processes and packs the data,and sends encrypted data back to server.In addition,the device can control its working state according to the control commands receives from server.The noise dust monitoring device uses Arduino as its main control board.The device includes a power supply module that can supply power to the device via solar or urban power grids,while providing stable voltages of different values for each module.The sensor module can measure noise and dust values and return the data to the single chip via the serial port.GPS module can get the location information of the device.The communication module can process the short message commands sent by the server and interactive data with the server by TCP communication through the wireless network.Single chip program is mainly responsible for module control,data acquisition,package encryption,command resolution,process control and other functions.Noise and dust monitoring equipment,servers and clients composes a system.It can achieve the entire process automation from data acquisition and analysis process to message push process.It is not only convenient for users to work,but also for the upper decision-making reference.This paper studies and designs an application-level protocol for communication between devices and servers,allowing two different platforms to communicate with each other.Based on the study of the TEA algorithm and the characteristics of the single chip,the paper makes two improvement of TEA.One is the data padding and the other is theaddition of the interleaving algorithm.The improved TEA algorithm is used to encrypt the communication data,and TCP protocol is used for wireless transmission.Both hardware and software of the device are developed in modular.It is not only easy for development of the system but also for later modification and extension.The research of the prototype device has been completed,and it has experienced several rounds of improvement according to the feedback of its deployment in the field environment and its real actual measurement performance.At present,the device under study can run for a long time without any trouble in the wild environment.It meets the designed requirements,and has been delivered to customers ultimately.