基于奶牛摄食行为识别的亚急性瘤胃酸中毒诊断模型研究

亚急性瘤胃酸中毒（SARA）是奶牛常发营养代谢病。因没有特定症状，且缺乏常规诊断工具，往往造成巨大损失。本项目在前期研究基础上，提出基于奶牛摄食行为识别的SARA诊断模型研究。首先，通过研制摄食行为、瘤胃pH及收缩感知装备，结合视频同步监测SARA诱导前后奶牛，获取其颌部运动及头部姿态、瘤胃pH及收缩数据以及视频，构建试验数据集；其次，明确奶牛颌部与头部在摄食中的行为规律，开展奶牛颌部咬合程度与头部姿态融合的摄食行为识别研究，探明摄食行为的数字化识别特征，在人工神经网络的辅助下，建立奶牛摄食行为识别模型；第三，对试验数据集进行摄食行为自动识别，并在时域、频域中提取相应行为的特征信息，研究瘤胃pH对摄食行为的影响，明确瘤胃pH对摄食行为的作用规律；最后，运用人工神经网络技术，建立奶牛SARA诊断模型。本项目可为研发具有自主知识产权的奶牛SARA诊断工具提供新方法。

Subacute ruminal acidosis (SARA) is a frequent nutritional and metabolic disease in dairy cows. Because there are no specific symptoms and also a lack of conventional diagnostic tools, it often causes huge losses. Based on the previous research, this project proposes a SARA diagnostic model based on the recognition of cow feeding behavior. First, through the development of feeding behavior, rumen pH and contraction sensing equipment, combined with video to monitor cows before and after SARA induction, the data of jaw movements and head postures, rumen pH and contraction data and videos can be obtained to build the dataset for experiments; Secondly, the behavioral rules of cows 'jaws and heads during feeding need to be clarified and then the project will carry out the research on the recognition of feeding behaviors that integrates the degree of bite of the cows' jaws with the head posture, to identify the digital characteristics of feeding behaviors. The recognition model of feeding behavior for dairy cows will be established with the artificial neural networks. Thirdly, the feeding behavior will be automatically identified from the experimental dataset, and the characteristic information of the corresponding behaviors in the time domain and frequency domain will be also extracted to study the effect of rumen pH on feeding behavior and identify the rules of rumen pH on feeding behavior; Finally, the artificial neural network technology will be used to establish the SARA diagnostic model for dairy cows. This project will provide a new method for the research and development of SARA diagnostic tools for dairy cows with independent intellectual property rights.