Suction Holder Control for Stable Gripping of Heavy Objects
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing handling devices face challenges in stably gripping objects with complex shapes and varying weights, as ensuring a large adsorption area does not guarantee stable grip, especially when objects are heavy, leading to potential dropping during transport.
Innovation Solution
A handling device with a holder and a calculator that estimates a holding safety factor, allowing the controller to adjust the gripping method based on contact area and distance between the holder and the object's center of gravity, ensuring a stable grip by optimizing the adsorption pressure and geometrical moment of inertia.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the adsorption area is maximized to ensure large contact surface, then the adsorption area is improved, but the holding stability deteriorates when the object is heavy
Solution Approach 1:
The system changes the parameters of the holding method by calculating the holding safety factor based on multiple factors including adsorption area, distance from center of gravity, weight, and geometrical moment of inertia. This allows optimization of the adsorption pressure and contact position to achieve both large adsorption area and stable holding for heavy objects
Solution Approach 2:
The system introduces feedback by calculating the holding safety factor based on actual object characteristics (weight, center of gravity position, contact area) and using this information to adjust the holding method. This ensures that the adsorption area is maximized while maintaining holding stability through continuous evaluation and adjustment
2Force
If the adsorption pressure is increased to hold heavy objects, then the holding force is improved, but the risk of object damage or deformation increases
Solution Approach 1:
The system optimizes the adsorption pressure by calculating the required holding force based on object weight and center of gravity position, then adjusting the adsorption pressure to the minimum necessary level. This prevents excessive pressure that could damage the object while still maintaining sufficient holding force
Solution Approach 2:
The system applies different adsorption pressures to different regions of the contact area based on the local requirements determined by the holding safety factor calculation. This allows concentrated force application at critical areas while using lower pressure in other regions, reducing overall damage risk
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 device stabilizes the grip of objects with complex shapes and varying weights by calculating an estimated holding safety factor, preventing objects from falling during transport by optimizing the adsorption pressure and geometrical moment of inertia, ensuring a safe and secure handling process.
Implementation Method 1
an end effector (hand) having a plurality of suction cups for adsorbing and gripping an object
Data Source
AI summary
A handling device according to an embodiment has a holder, a calculator, and a controller. The holder is capable of holding an object. The calculator calculates an estimated holding safety factor when the holder holds an object. The controller causes the holder to hold the object on the basis of the estimated holding safety factor calculated by the calculator.