| The application of human body positioning and motion state detection in elderly monitoring and smart home has urgent needs and important application value.The existing solutions are mainly based on depth cameras,infrared sensors,and wearable devices.The shortcomings of the camera and infrared light optics are that they cannot effectively protect privacy,detect distances,and detect occluded objects.The disadvantage of wearable devices is that they are detected.The corresponding equipment must be carried in order to be tested.Compared with the prior art,the radar-based human body positioning and motion state detection has the advantages of effective protection of privacy,long-distance detection,detection of occluded objects,and no need for the detected personnel to carry equipment.In this paper,the basic principle of millimeter wave radar is studied in depth,and the human body localization algorithm and motion state detection algorithm are proposed.The radar-based human body positioning and motion state detection system is realized.Unit testing and system testing showed that the system achieved an accuracy of more than 98%.The work of this thesis mainly includes the following aspects:Firstly,for the specific application scenarios of indoor detection,the research status of human body positioning and motion state detection at home and abroad is analyzed,and the advantages and disadvantages of current work are summarized.The radar-based human body positioning and motion state detection system is designed.Secondly,this paper introduces the basic theory of millimeter wave radar,studies CFAR algorithm and target aggregation algorithm,and proposes human body localization algorithm and motion state detection algorithm.Thirdly,a radar-based human body positioning and motion state detection system is realized.Finally,the radar signal processing algorithm is simulated by unit,and the radar measured data is used for testing.The feasibility of the human body positioning and motion state monitoring algorithm is verified,and the system prototype is further tested to evaluate the system performance. |
