Sensorized Vacuum Suction Cup Control for Safe Adhesion
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Solution Overview
Problem
Existing vacuum adhesion systems, both manual and motorized, face limitations in versatility and safety, with manual systems failing on rough surfaces and motorized systems being cumbersome and unsafe due to power requirements, leading to potential bodily harm and high operational costs.
Innovation Solution
A vacuum adhesion system with smart suction cups that include sensors, force sensors, and a processor to monitor pressure differentials and forces, providing real-time feedback and control to ensure safe and efficient attachment and detachment, and allowing for modular operation without constant power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a robotic system is designed to handle multiple different objects with varying weights, shapes, and textures, then the system's versatility is improved, but the device complexity increases due to the need for multiple end effectors or complex gripper mechanisms
Solution Approach 1:
The patent applies a single vacuum-based end effector that can handle multiple different objects (cans, bottles, containers of various shapes and textures) through universal adhesion. The vacuum cup system creates sufficient holding force across diverse object types without requiring multiple specialized grippers, thereby achieving versatility while maintaining relatively simple device architecture.
Solution Approach 2:
The patent replaces complex mechanical gripper mechanisms with a vacuum-based adhesion system. Instead of using mechanical fingers, claws, or multiple end effectors to grasp objects, the system uses vacuum pressure to create holding force, substituting mechanical complexity with a simpler pneumatic field-based approach that can accommodate varying object geometries and textures.
2Device complexity
If the robotic system uses a vacuum adhesion end effector to handle objects, then the device complexity is reduced compared to multiple grippers, but the system becomes sensitive to environmental factors such as dust particles and air leaks that can compromise the vacuum seal
Solution Approach 1:
The patent incorporates a compliance element between the vacuum cup and the robotic end effector body that can deform to compensate for surface irregularities, dust particles, or minor air leaks. This compliance mechanism acts as a cushion that maintains the vacuum seal despite environmental contaminants or slight variations in object surfaces, thereby protecting the system's reliability without requiring complex sealing mechanisms.
3Force
If the vacuum cup is designed with a large surface area to handle heavier objects, then the adhesion force is improved, but the ease of operation deteriorates due to reduced maneuverability and increased weight of the end effector
Solution Approach 1:
The patent employs a compliance element that introduces dynamic flexibility to the end effector structure. This compliant mechanism allows the vacuum cup to adapt its position and orientation dynamically while maintaining vacuum contact with the object, enabling the system to maneuver with larger vacuum cups without sacrificing ease of operation. The compliance element absorbs mechanical stresses and allows flexible positioning that would be impossible with rigid large-area cups.
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
Enhances safety by providing early warnings and optimizing energy use, enabling versatile use on various surfaces and reducing the risk of detachment, while maintaining mobility and efficiency.
Implementation Method 1
The end effector (150) may comprise a vacuum cup (152) that utilizes vacuum adhesion to hold an object (104)
Implementation Method 2
a compliance element that may deform to compensate for a mismatch between the rigid end effector and an object being manipulated by the robotic system
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
Vacuum adhesion system, comprising: • - at least one suction cup (3) having a suction surface for attaching to a surface; • - at least one system module (23), comprising: • - at least one vacuum pump (1) connecting to the suction cup for applying a vacuum to the suction surface for providing suction adhesion; • - at least one indicator or sensor (4) for indicating or measuring a pressure differential (ΔΡ) in the suction cup; • - at least one interface (6) for communicating said measured pressure differential or a value based thereon; and • - a processor (5) for controlling said vacuum adhesion system.