Design Of Wild Animal Image Acquisition System Based On Wireless Sensor Network

Obtaining wild animal image information through infrared trigger camera has become one of the main methods of wild animal detection.The infrared trigger camera based on the dedicated network or 4G communication module can automatically return the image data to the remote data center,which can overcome the problems of low manual data recovery efficiency,high cost,long cycle,and poor timeliness of the traditional infrared trigger camera.However,the former is faced with the problems of high construction cost of network communication base stations and difficult policy approval,while the latter is faced with the problems of weak construction of basic communication facilities and poor signal coverage in some monitoring areas.In addition,existing infrared trigger cameras generally have the problem of high false trigger rate,which brings many disadvantages to subsequent data storage and processing.This paper designs a wild animal image acquisition system based on wireless sensor network,which can realize the automatic collection of wild animal images,false trigger image selection and automatic image transmission.main tasks as follows:1.Designed and produced a low-power image acquisition device.The device is based on the OV2640 image sensor and STM32H743 microcontroller,equipped with a pyroelectric sensor for infrared triggering,which realizes the automatic collection and processing of monitored images,and uses a light intensity sensor with a filter switch and infrared LED to achieve night shooting.The equipment performs fine charge and discharge management of lithium batteries through power consumption detection devices and power management devices,and uses solar panels to extend the life cycle.2.The false trigger image pre-screening function based on Vi Be algorithm is implemented on the device side.The Vi Be algorithm is optimized and adapted to the interface characteristics of the microcontroller platform.This algorithm can complete the separation of foreground and background,so as to realize image false trigger evaluation and decision,remove false trigger images,and mitigate the adverse effects of false trigger.3.Achieve reliable two-way data transmission based on Xmodem.In view of the characteristics of the limited data transmission packet length of the wireless transmission module and the low real-time requirements in wild animal monitoring applications,the data transmission protocol is designed based on the Xmodem protocol in the Zigbee wireless transmission module.The sleep according to the routing path period and the wake-up mechanism are designed for reduing the power consumption of the network4.Designed equipment remote control and software update method.In view of the difficulty of remote maintenance after equipment deployment,a script interpreter is designed in the equipment to realize the unified control of the equipment’s algorithm call,control logic and false trigger image prescreening mechanism,which is convenient for the remote control and equipment of the equipment through script update Software update.5.Complete equipment commissioning and performance testing.The device was commissioned for stand-alone function and network debugging,and the design indicators such as the accuracy of pretriggered image preprocessing,power consumption,and transmission performance of the device were tested.The experimental results show that all functions meet the design requirements.The image acquisition system based on wireless sensor network studied in this paper provides a solution for remote automatic real-time monitoring of wild animals,and is of great significance for improving the automation and intelligence level of wild animal image acquisition equipment.