Shear Deflection Detection via Optical Through-Beam Sensors
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Solution Overview
Problem
Recycling equipment shears often jam due to excessive deflection and increased forces caused by dull blades or misalignment, leading to costly downtime and safety hazards, necessitating robust but expensive manufacturing to prevent these issues.
Innovation Solution
A shear deflection detection system using optical through-beam sensors to measure the deflection of the cross head during the shearing process, allowing for timely halting of the operation before jamming occurs, which includes an emitter and receiver mounted on the cross head to detect changes in the light beam path caused by deflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional material is added to increase shear strength and durability, then reliability improves, but manufacturing cost increases
Solution Approach 1:
The patent applies preliminary action by implementing a deflection detection system that monitors shear behavior in real-time and triggers alerts before failure occurs. This proactive monitoring allows the system to take preventive maintenance actions before the shear actually fails, ensuring reliability without requiring excessive over-engineering of the shear structure itself.
Solution Approach 2:
The patent implements feedback through a deflection detection system that continuously monitors the shear's behavior and provides information back to the control system. This feedback mechanism allows for real-time adjustments and preventive maintenance scheduling based on actual shear performance, replacing material-based redundancy with intelligent monitoring.
2Reliability
If robust shear design is used to prevent jamming, then equipment reliability improves, but device complexity and cost increase
Solution Approach 1:
The patent replaces mechanical redundancy (robust shear design) with an optical/electronic detection system. Instead of making the shear physically more robust through additional material and structural complexity, the system uses deflection sensors and control logic to monitor and predict failure, substituting mechanical over-engineering with intelligent sensing.
Solution Approach 2:
The patent introduces an intermediary deflection detection system between the shear and the potential jamming event. This intermediary system monitors shear behavior and provides early warning, acting as a mediator that prevents the direct transition from normal operation to jamming without requiring the shear itself to be more robust.
3Loss of time
If deflection detection is implemented to prevent jamming, then loss of time is reduced, but device complexity increases
Solution Approach 1:
The patent implements self-service by enabling the shear system to monitor its own condition through integrated deflection detection. The system detects its own deflection and generates alerts autonomously without requiring external monitoring equipment or manual inspection, reducing downtime through self-diagnosis and proactive alerting.
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
Prevents equipment jamming by predicting and preventing excessive deflection, thereby reducing maintenance costs and downtime, and allowing for proactive maintenance of the shears without causing damage to the recycling machine.
Implementation Method 1
A shear deflection detection system using optical through-beam sensors to measure the deflection of the cross head during the shearing process
Data Source
AI summary
A through beam shear angle change, cutting blade deflection detector including a cutting member within a shear box of a recycling machine, a through beam sensor including an emitter disposed on the cutting member and a receiver disposed on the cutting member, the receiver being disposed relative to the emitter for receiving a signal emitted from the emitter, and a controller connected to at least the receiver, the controller being configured to determine an amount of cutting member deflection based on an output of the receiver.