Sensor-Guided Robotic Harness for Clear Path Obstacle Detection
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Solution Overview
Problem
Conventional assistive technologies for vision-impaired individuals, such as white canes and guide dogs, have not evolved significantly in decades, and commercially available electronic travel aids have not seen wide-scale adoption due to lack of confidence or high costs, limiting effective navigation and object avoidance capabilities.
Innovation Solution
A robotic device equipped with optical, ultrasonic, and GPS sensors, along with a central processing unit and tactile feedback mechanisms, provides clear path detection and object avoidance by analyzing sensor data and offering auditory and haptic feedback to guide users safely through their environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional assistive technologies (white cane, guide dog) are used, then the device complexity is low and ease of operation is high, but the measurement precision of environmental detection and reliability of clear path detection remain insufficient
Solution Approach 1:
The patent combines multiple sensing modalities (optical sensors, ultrasonic sensors, GPS, accelerometers) into a single integrated robotic guide system. This merging of different detection technologies enables comprehensive environmental perception with high measurement precision while managing device complexity through unified system architecture.
Solution Approach 2:
The robotic guide system performs multiple functions simultaneously: obstacle detection, clear path identification, location tracking, and tactile feedback provision. This multi-functionality allows a single device to replace traditional separate assistive tools while delivering superior environmental detection precision.
2Loss of information
If traditional white cane method is used, then the device complexity is minimal, but the loss of information about the environment is significant as it only detects objects through direct contact
Solution Approach 1:
The patent replaces the mechanical contact-based detection method (white cane sweeping) with electronic sensing systems including optical sensors and ultrasonic sensors. This substitution eliminates the need for physical contact to detect objects, dramatically reducing environmental information loss by enabling remote, non-contact detection of obstacles and environmental features.
Solution Approach 2:
The robotic guide system acts as an intermediary between the vision-impaired user and the environment. It collects comprehensive environmental data through multiple sensors and relays this information back to the user via tactile feedback, minimizing information loss by serving as an intelligent mediator that processes and communicates environmental details.
3Reliability
If electronic travel aids with multiple sensors are adopted, then the measurement precision and reliability of clear path detection improve, but the cost and device complexity increase significantly
Solution Approach 1:
The patent segments the detection system into specialized sensor modules (optical sensors for clear path detection, ultrasonic sensors for obstacle detection, GPS for location tracking). Each segment performs a specific function with high reliability, and the modular architecture manages overall device complexity by organizing components into functional units.
Solution Approach 2:
The system incorporates tactile feedback mechanisms that provide real-time information to the user about detected obstacles and clear paths. This feedback loop enhances detection reliability by confirming sensor measurements through multiple channels (electronic sensing plus tactile verification) while managing complexity through efficient feedback processing.
4Productivity
If comprehensive sensor integration is implemented, then the productivity of navigation and object avoidance improves, but the use of energy and device complexity increase
Solution Approach 1:
The patent implements periodic scanning and detection cycles rather than continuous operation of all sensors. The system alternates between active sensing phases and lower-power states, maintaining high navigation productivity through efficient timing sequences while reducing overall energy consumption of the multi-sensor system.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The robotic guide system enhances navigation independence and confidence for vision-impaired individuals by providing detailed environmental information and safe path detection, avoiding obstacles and detecting changes in elevation, doors, and other objects, offering a more advanced alternative to traditional methods.
Implementation Method 1
optical sensors... are able to perceive and reveal rich details about a vision impaired person's surroundings
Implementation Method 2
ultrasonic sensors... are able to perceive and reveal rich details about a vision impaired person's surroundings
Implementation Method 3
an accelerometer... The combination of the one or more wheels upon the surface and the rigid harness connected to the one or more wheels provides tactile feedback from the surface directly to the operator
Data Source
AI summary
A guide system is provided that uses a plurality of sensors to identify and determine a clear path for an ambulatory vision impaired person. The system includes one or more wheels that rotate to propel the system, a platform supported by the one or more wheels and housing a processor, a rigid harness with a haptic feedback grip that is positioned to be grasped by an operator, and one or more sensors configured to sense information about the environment. In operation, the processor analyzes information sensed by the sensors to identify object in the path of the guide system and sends messages to the operator to allow the operator to avoid the identified objects. The messages may be sent to the operator via the haptic feedback grip or audibly via a speaker or via a wireless connection to a haptic or audio device being worn by the operator.