Differential Thickness Sensing for Overlapping Object Detection
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Solution Overview
Problem
Industrial manufacturing processes face challenges in accurately detecting overlapping objects due to electromagnetic interference, debris, and non-flat object shapes, leading to machinery complications and damage.
Innovation Solution
A sensor system with dual emitters and receivers positioned on opposite sides of a plane to emit and receive signals, allowing for differential measurement of object thickness, independent of object position and shape, and capable of detecting overlapping objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional sensors are positioned in the operating environment to detect overlapping objects, then detection capability is provided, but electromagnetic interference and debris cause inaccurate and unreliable performance
Solution Approach 1:
The patent introduces an intermediary measurement approach using differential thickness measurement between two positions. Instead of directly detecting object presence in the harsh electromagnetic environment, the system measures thickness at two different positions and compares them, using the difference to infer overlapping conditions. This intermediary method avoids direct sensor exposure to harmful electromagnetic fields while still achieving reliable detection.
Solution Approach 2:
The patent replaces conventional electromagnetic sensors with a measurement system based on thickness differential measurement. By substituting direct electromagnetic detection with a comparative measurement approach, the system achieves immunity to electromagnetic interference while maintaining detection capability for overlapping objects.
2Reliability
If photoelectric sensors are used in the operating environment, then object detection is enabled, but dirt and debris negatively impact sensor performance
Solution Approach 1:
The system uses an intermediary differential measurement approach that compares thickness at two positions rather than relying on absolute sensor readings. This method makes the detection process immune to debris contamination affecting individual sensor readings, as the comparison reveals relative changes caused by overlapping objects rather than absolute values affected by environmental factors.
3Reliability
If a single sensor is positioned on one side of non-flat objects, then device complexity is minimized, but detection effectiveness is limited due to object shape variations
Solution Approach 1:
The patent introduces a new dimension to the measurement approach by measuring thickness at two different positions along the object's length. This differential measurement in the spatial dimension allows the system to detect overlapping conditions on non-flat objects without requiring complex multi-angle or multi-position sensor arrangements, achieving effective detection while maintaining relatively simple device configuration.
4Reliability
If ultrasonic sensors are used to detect overlapping objects, then material-specific detection is achieved, but performance is limited to specific thicknesses and forced air environments cause measurement errors
Solution Approach 1:
The patent creates a universal detection method that works across different materials and environmental conditions by using differential thickness measurement. The system measures at two positions and compares the difference, making it adaptable to various object materials and thicknesses without being constrained by ultrasonic sensor limitations regarding material specificity or environmental sensitivity to forced air and nebulized substances.
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
Accurately identifies overlapping objects, preventing their entry into machinery, thereby reducing complications and damage by initiating alerts or removal actions.
Implementation Method 1
The first receiver is positioned to receive the second signal that passes through the plane when the plane is unoccupied, and is further positioned to receive the first signal which reflects from a first surface of an object when the object occupies at least a portion of the plane
Data Source
AI summary
A system including at least one apparatus that measures thicknesses of objects. The apparatus includes a first emitter, a second emitter, a first receiver, and a second receiver. The first emitter and the second receiver are positioned diagonally opposed across a plane, and the second emitter and the first receiver are positioned diagonally opposed across the plane. The first receiver receives a first signal emitted by the first emitter after reflecting off of an object occupying the plane. The second receiver is positioned to receive a second signal emitted by the second emitter after reflecting off of the object. The apparatus includes a circuitry operable to determine the thickness of the object based on reflections of the first signal and the second signal.