Motorized Cane with Servo Guide Wheel for Obstacle Navigation
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Solution Overview
Problem
Individuals with visual and hearing impairments face challenges in navigating through environments safely, as existing technologies lack effective guidance systems that can detect obstacles and provide real-time directional assistance.
Innovation Solution
A robotic sighted guiding system (RSGS) equipped with a motorized cane that uses GPS, sensors, and algorithms to detect obstacles, provide tactile and auditory feedback, and steer the user around objects, utilizing a servo-controlled guide wheel and motorized wheel for navigation, while integrating smartphone inputs and various sensors for obstacle detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a robotic sighted guiding system with GPS, sensors, and algorithms is implemented, then navigation accuracy and obstacle detection capability are improved, but device complexity increases
Solution Approach 1:
The system divides obstacle detection into multiple specialized sensors (ultrasonic sensors for distance measurement, cameras for visual recognition, GPS for location tracking) rather than using a single complex sensor. Each sensor handles a specific aspect of detection, improving overall accuracy while allowing modular implementation and maintenance.
Solution Approach 2:
The patent introduces a microcontroller as an intermediary that processes data from multiple sensors and coordinates the guide wheel servo motor. This central control unit simplifies the system architecture by providing a single point of coordination, making the complex interactions between sensors and actuators more manageable.
2Ease of operation
If a servo-controlled guide wheel and motorized wheel are used for active steering, then guidance effectiveness is improved, but device complexity and power consumption increase
Solution Approach 1:
The guide wheel is designed to be servo-controlled, allowing the system to automatically adjust and steer itself based on sensor input and algorithmic processing. The motorized wheel provides self-propulsion capability, enabling the device to navigate autonomously without requiring manual steering intervention from the user.
Solution Approach 2:
The steering mechanism uses a servo motor to dynamically adjust the guide wheel angle in real-time based on detected obstacles and desired navigation path. This dynamic adjustment capability allows the system to adapt to changing environmental conditions, improving guidance effectiveness while maintaining relatively simple mechanical structures through electronic control.
3Reliability
If tactile and auditory feedback mechanisms are integrated, then user awareness and safety are improved, but device complexity increases
Solution Approach 1:
The system integrates multiple feedback mechanisms (tactile alerts through vibration motors, auditory alerts through speakers, and visual information through smartphone connectivity) into a single feedback subsystem. This multi-functional approach ensures that the system can communicate with the user through multiple channels, improving reliability by providing redundancy if one feedback method fails or is insufficient for the current situation.
Data Source
AI summary
Devices and methods for assisting and guiding a person with visual and/or hearing impairment. In various embodiments there is a computer-guided, motorized walking stick. Preferably, at least one wheel at the distal end of the stick, and in contact with the ground, can be steered or pivoted over a range of angles, and thus establish a desired direction. In yet other embodiments there are one or more powered wheels that further drive the walking stick in the desired direction. Various algorithms are disclosed for providing instructions to the computer controller by way of various input devices. Still further embodiments include various types of sensors that provide data to the computer with regards to objects proximate to the walking stick.