Research On Wireless Image Transmission Technology Based On ZigBee

The development of computer network technology affects and improves people's work and lifestyle.Most data are transmitted through the network,but in some special or terrible environments,it may not be suitable to use wired networks,and even image information cannot be collected by shooting method.Therefore,to collect the image must use the image sensor,then use wireless transmission to send the images to the host computer,and finally realize the analysis and processing of the image.There are many transmission methods,such as Bluetooth and Wi-Fi networking.However,for Bluetooth,the disadvantage is that the transmission rate is too slow and the efficiency is too low,which is not conducive to accurate environmental monitoring,as to Wi-Fi networking,the disadvantage is that the cost is too large.Therefore,this article proposes an image transmission system based on the ZigBee network,which accurately and economically transmits image data to the host computer,providing a basis for monitoring and picture collection in special environments.The Wireless sensor transmission image system based on the ZigBee network,which is composed of two parts,upper computer,and lower computer.The lower computer includes image acquisition and conversion processing.The OV7670 image sensor collects image data and transmits it to the STM32 microcontroller.A CC2530 is used as a collection node device to collect image data from the STM32 microcontroller.Another CC2530 is used as a coordinator to connect with the upper computer.These two CC2530 modules adopt the selforganizing network mode,the network is created by the coordinator,and the terminal equipment is finally added to the network.The image data collected in this way is transferred from the image sensor to the coordinator,and the coordinator sends the image information to the host computer through the serial port.The host computer can receive the data transmitted by the coordinator and save the image data.Finally,the received pictures are enhanced to obtain clear and high-contrast pictures,which solves the phenomenon of packet loss during transmission.The lower computer uses C language to write the program,and the upper computer selects C # language to write the communication interface.The network communication part installs and compiles the environment IAR Embedded Workbench for MCS-51 7.51 A,writes the ZStack protocol to complete the network design,and realizes the wireless transmission of data.In order to solve the problem of poor contrast of the image during transmission and packet loss during transmission,the image enhancement algorithm was studied and a script program was written using Matlab2018.The research of the system makes some data and images can be stably transmitted in the medical field,industrial field and extreme conditions,and It has good reliability,ensures the normal operation of the equipment,reduces the burden of the staff.provides the basis for the establishment of sensor network with ZigBee technology.This research project has certain social and economic value.