Proximity Sensor Assembly for Suction Pad Deformation Detection
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Solution Overview
Problem
Conventional robot hands with suction pads fail to accurately detect the deformation of suction pads, which affects their ability to securely grasp objects, leading to potential misalignment and operational inefficiencies.
Innovation Solution
A sensor assembly is designed to attach to suction apparatuses, featuring proximity sensors that measure the deformation of suction pads, improving signal-to-noise ratio and detection accuracy by positioning sensors close to the suction area, and including multiple sensors for comprehensive deformation measurement and object detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the axial length sensor is used to detect the object, then the object detection function is provided, but the deformation amount of the suction pad cannot be accurately measured
Solution Approach 1:
A proximal sensor is introduced as an intermediary measurement device between the suction pad and the control system. This sensor specifically measures the deformation amount of the suction pad by detecting changes in distance or position, providing direct deformation data that the axial length sensor cannot capture. The intermediary sensor bridges the gap between the suction pad's physical deformation and the digital signal needed for control decisions.
2Reliability
If the sensor is positioned far from the suction portion, then the installation is simplified, but the signal-to-noise ratio deteriorates
Solution Approach 1:
The sensor is positioned locally close to the suction portion where the deformation occurs, rather than being placed remotely. This local positioning ensures that the sensor captures the deformation signal with high fidelity and minimal noise interference. The sensor is integrated into or near the suction pad assembly, creating a localized measurement system that prioritizes signal quality over installation simplicity.
3Measurement precision
If a single sensor is used, then the device complexity is reduced, but blind spots in deformation detection occur
Solution Approach 1:
The suction pad surface is divided into multiple detection zones, each monitored by a dedicated proximal sensor. Instead of using one omnidirectional sensor that would have blind spots, multiple sensors are strategically positioned to cover different regions of the suction pad. This segmentation of the detection field ensures complete coverage of the suction surface, allowing the system to detect deformation at any location on the pad.
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 sensor assembly enables precise determination of suction pad deformation and object state, enhancing the suction apparatus's operational accuracy and speed by ensuring proper contact and orientation, thus preventing misalignment and improving overall performance.
Implementation Method 1
one or more first proximity sensors that are disposed on the main body, and configured to detect that the suction portion is deformed by the negative pressure
Data Source
AI summary
A sensor assembly may include: a main body and one or more first proximity sensors. The main body may include a space through which a shaft of a suction apparatus passes is formed. The one or more first proximity sensors may be disposed in the main body, and may be configured to detect the suction portion that is deformed by the negative pressure. The main body may further include a fixture that has a fixed portion that is fixed to the shaft, and a support portion that supports the main body.