Robotic Arm Tactile Sensing for Haptic Feedback Latency
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Solution Overview
Problem
Haptic-feedback systems often provide inaccurate or delayed information, leading to latency and incorrect user interactions in virtual environments, as they struggle to accurately simulate real-world surface interactions.
Innovation Solution
A robotic-arm apparatus with tactile-sensing pads and an actuator, coupled with a wearable glove, dynamically detects and classifies surface data from a real-world environment, providing timely and accurate haptic feedback to the user by mimicking hand movements and surface interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional visual feedback is used in virtual environments, then the system complexity is low, but the user experience is incomplete and lacks tactile realism
Solution Approach 1:
A robotic arm acts as an intermediary between the user's hand movements and the virtual environment interactions. The robotic arm equipped with tactile sensors captures real surface data, which is then processed and converted into haptic feedback through a glove worn by the user. This intermediary system bridges the gap between simple visual feedback and complex tactile realism.
Solution Approach 2:
The patent replaces traditional mechanical haptic feedback systems with a sensor-based approach. Instead of using complex mechanical mechanisms to simulate tactile sensations, the system uses tactile sensors on the robotic arm to detect surface properties and electronically transmits this information to create haptic feedback, reducing mechanical complexity while improving accuracy.
2Measurement precision
If pre-generated haptic feedback is used, then the device complexity is reduced, but the feedback accuracy decreases as users manipulate objects in the environment
Solution Approach 1:
The haptic feedback system transitions from static pre-generated feedback to dynamic real-time feedback. The robotic arm continuously tracks user hand movements and captures live surface data from the environment, which is then processed and delivered as adaptive haptic feedback through the glove. This dynamic approach ensures feedback accuracy matches actual user interactions with objects.
Solution Approach 2:
The system implements a closed-loop feedback mechanism where tactile sensors on the robotic arm detect surface characteristics during user manipulation, this data is processed by a computing subsystem, and the resulting haptic feedback is delivered through the glove. The feedback loop continuously adapts to user actions, maintaining high accuracy throughout object manipulation tasks.
3Speed
If haptic feedback systems are implemented without robotic sensing, then the device complexity is lower, but latency increases and interferes with user perception
Solution Approach 1:
The robotic arm is positioned and calibrated in advance to mirror the user's hand position, and tactile sensors are pre-configured to capture surface data at the exact points of contact. This preliminary setup ensures that when the user interacts with objects, the sensing is already in place and can immediately capture and transmit surface information without delay, reducing latency in the feedback loop.
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
This solution enhances user interaction accuracy by providing realistic haptic feedback, reducing latency and improving the perception of virtual environments through precise simulation of real-world surface characteristics and movements.
Implementation Method 1
one or more tactile-sensing pads coupled to at least a portion of the robotic hand, wherein a tactile-sensing pad is configured to detect surface data about a surface in a real-world environment
Implementation Method 2
an actuator configured to move the robotic hand to mimic a motion of a glove worn by the user's hand
Implementation Method 3
the glove is configured to provide haptic feedback corresponding to the surface data to the user's hand
Implementation Method 4
The tactile-sensing pad may include at least one sensor that detects vibration during contact between the tactile-sensing pad and the surface in the real-world environment
Data Source
AI summary
A robotic-arm apparatus may include a robotic hand dimensioned to approximate a size and movement of a user's hand. The robotic-arm apparatus may also include one or more tactile-sensing pads coupled to at least a portion of the robotic hand, wherein a tactile-sensing pad is configured to detect surface data about a surface in a real-world environment. Additionally, the robotic-arm apparatus may include an actuator configured to move the robotic hand to mimic a motion of a glove worn by the user's hand, wherein the glove is configured to provide haptic feedback corresponding to the surface data to the user's hand. Various other apparatuses, systems, and methods are also disclosed.