Wheelchair automatic follow method and system based on radio signal strength

Abstract

The invention provides an automatic wheelchair following method based on the radio signal intensity. The automatic wheelchair following method includes the steps that connection with a signal emission device located on the body of a nursing person is established in a radio mode for matching; the radio signal intensity is analyzed, and relative positioning between the nursing person and a wheelchair is obtained according to the relationship between the signal intensity and the distance; according to the angular speed, received in a radio mode, of the signal emission device and the obtained relative positioning between the nursing person and the wheelchair, the linear speed and the turning speed of the wheelchair are calculated, and a wheelchair control module is controlled. The automatic wheelchair following method is based on radio signal connection and suitable for close-distance following; the distance is judged through the radio signal intensity, the accuracy is high, and is not prone to environmental-factor interference, the response speed is high, automatic following of the nursing person of the wheelchair is achieved, artificial control is saved, greater convenience and comfortableness are brought to a user, the signal emission device only needs to be arranged on the same nursing person, multiple wheelchair users can be looked after at the same time, and the nursing efficiency is improved.

Description

technical field [0001] The invention belongs to the field of intelligent wheelchairs, and in particular relates to a wheelchair automatic following method and system based on radio signal strength. Background technique [0002] With the continuous advancement of information and communication technology, technology is being integrated into our daily life, bringing infinite convenience and comfort. With the intensification of population aging, people's concern for vulnerable groups has reached a new level. Therefore, it is of great significance to scientifically and effectively provide convenient mobile services for vulnerable groups such as the elderly and the disabled. Existing electric wheelchairs allow users to control the running state of the wheelchair through sensing devices such as joysticks. However, when accompanied by a caregiver, the user still needs to control it. The interaction between the person and the wheelchair is too simple and does not have intelligence. ...

AI Technical Summary

Problems solved by technology

Although there are already some automatic following systems, most of them are theoretical researches and are rarely used in real life, especially in the scene of smart wheelchairs.

And these following systems generally use ultrasonic ranging or visual recognition to achieve following, but in ultrasonic following systems, due to factors such as environmental interference and the absorption of ultrasonic waves by human clothing, the accuracy of ultrasonic ranging is low, so it is difficult to achieve fast and accurate tracking. follow

However, the current vision algorithm has poor real-time performance in specific applications, and the robustness of the object detection algorithm is insufficient, and the algorithm is only applicable to a specific scene model and requires specific lighting conditions.

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