# A Construction Method of Lower Limb Rehabilitation Robot with Remote Control System
## 1 Introduction  
For post-stroke patients, rehabilitation of the hemiplegic part of the brain is the main medical treatment, and early rehabilitation helps to reduce the possibility of future disabilities. Traditional rehabilitation training requires the therapist to assist the patients in manual rehabilitation. This rehabilitation method is time-consuming and costly. Nevertheless, due to the lack of objective data for the scientific evaluation of the training parameters and rehabilitation effects, it is difficult to optimize the training parameters to obtain the best therapeutic effect. Recent advances in medical technology have improved the survival rate of stroke patients and expanded the number of hemiplegic patients. Therefore, the rehabilitation of stroke patients has become essential. In 2020, the epidemic caused by the COVID-19 virus spread around the world. Hence, going to a hospital or rehabilitation institution for traditional rehabilitation is not the best choice. The question is what should patients do at home to recover? Telemedicine is of essential importance in meeting the rehabilitation needs of home-bound patients and improving the quality of medical care. Telemehabilitation refers to the application of Internet and communication technologies to transmit electronic rehabilitation data to different places. This provides several advantages of including convenience and speed, and it is also available at any time and any place. Telemehabilitation also facilitates completing rehabilitation training at home. Comparing to on-site rehabilitation, telerehabilitation has different rehabilitation environments, different rehabilitation equipment, different rehabilitation procedures, guidance methods, guidance objects, etc. Telemehabilitation also provides advantages including high efficiency, convenience, lower costs, and practicality. No matter where you are, in a remote outlying town or near a city, you can enjoy the same quality of telerehabilitation services. Instead of a regular rehabilitation center or hospital, most older people need daily telerehabilitation in their living environment. The existing techniques and technologies and challenges to promote and improve the effectiveness of telerehabilitation are discussed in [1]. In [1] the technological solutions based on video analytics, wearables, robotic support, sensor, and gamified telerehabilitation are examined. It also analyzes and discusses the current strengths, limitations, and future challenges of telerehabilitation medicine. Further, [2] suggests that sending remote rehabilitation services to patients' homes is useful to patients' recovery. Telerehabilitation services can overcome geographical, physical, and cognitive barriers and enable doctors to watch, educate, and treat patients in their environment, improving, or even replacing traditional forms of rehabilitation. Setting up a telerehabilitation system needs extensive study. For instance, [3] suggests that telemedicine and telecommunication are no longer simply remote connections. Such systems can capture and summarize data and provide information to patients, care, or healthcare professionals. The corresponding data can be also stored locally or in a shared environment, e.g., cloud. The current telemedicine and remote watching are trying to establish an efficient and sustainable system to collect and analyze data. Although progress has been made in remote home rehabilitation, there are still several major obstacles. The authors of [4] show that telerehabilitation is an effective intervention in treating stroke patients. Patients can undergo various forms of therapy under the remote supervision of a doctor to improve the motor and cognitive impacts caused by the stroke. Research has also shown that telerehabilitation interventions have better or equal efficacy for motor, cortical, and mood disorders compared to traditional face-to-face therapy.