Research On The Method Of Judging Pig Abnormal Behavior Based On Location-Aware

With the increase in the density of intensive livestock and poultry farms,breeding environment becomes bad and leads to frequent diseases.The traditional methods of relying on artificial observation to judge the diseases of livestock and poultry have been inefficient.Therefore,using advanced science and technology to establish a warning mechanism for livestock and poultry diseases has become an important research direction of livestock and poultry health breeding.From the current research situation,it has become a hot spot to realize the automatic warning of diseases of livestock and poultry by means of sensor technology,computer technology and wireless network technology.At the same time,eating behavior is the basic behavior of poultry,livestock and poultry eating behavior is closely related to the health status;therefore the use of dietary behavior of livestock and poultry to determine animal diseases,has become the focus of attention of the people.To solve the above problems,put forward the "localization method based on ultrasonic ranging and positioning based on abnormal behavior of pigs judgment method".Firstly,a real-time position sensing system based on ultrasonic ranging is designed;then,the system location information for pigs are collected;and then get the pigs eating behavior by location information;and abnormal characteristics of pigs by dietary behavior to determine the health of pigs.The main contents of this paper include the following aspects:(1)Aiming at the problem of pigs' position detection,a position sensing system based on ultrasonic ranging is designed.In this system,the distance between the unknown node and the reference node is measured by the time difference of arrival(TDOA)method,which is based on the combination of ultrasonic and RF technology.And then the position of the unknown node is calculated according to the least square algorithm.In order to improve the accuracy of ranging and positioning accuracy,the source of TDOA ranging error is systematically analyzed,and the method of temperature compensation and error correction model is proposed to correct the distance error,which lays the foundation for accurate detection of pig position.(2)According to the problem of real-time display of pigs' position detection results,the trajectory display interface based on LabVIEW platform is designed.The calculated result of the pigs' position is packed into the form of data cluster,and displayed by the XY diagram in LabVIEW.In order to eliminate the interference of abnormal data to the test results,the method of limiting filter is proposed.Determining whether to retain the data according to the difference of the two consecutive data,and obtaining the limiting threshold according to the size of the system layout and experience.The above work improves the stability of the display system.(3)Aiming at the problem of abnormal behavior of pigs,the method of determining the abnormalities of pigs based on the number of behaviors and duration is put forward.Firstly,the specific activity area of the pig house is divided according to the position parameter of the pig,and the number of times and duration of feeding is counted.Secondly,a preliminary judgment on the dietary behavior is made according to the breeding experience and observation.Then make a comprehensive evaluation on the overall diet of pigs' abnormal situation through the statistical number of pigs' feeding.