Clutch Assembly Slip Detection Using Proximity Sensors
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Solution Overview
Problem
Hoists used in aircraft and other applications face challenges in detecting and managing slip conditions, which can occur due to overload, leading to potential damage or safety risks during cable-reeling operations.
Innovation Solution
A clutch assembly with proximity sensors to monitor the number of teeth passing by gears within a specific period, determining slip conditions by comparing the synchronization between the motor and cable drum gears, and triggering overload protection to prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional slip detection methods are used in hoists, then the structure remains simple, but the ability to detect and prevent slip conditions is insufficient, leading to potential damage and safety risks
Solution Approach 1:
The patent replaces traditional mechanical slip detection mechanisms with proximity sensors that use electromagnetic fields to detect gear tooth positions. This substitution improves reliability by providing precise, contactless measurement of gear rotation while avoiding the wear and complexity of mechanical switches or contacts.
Solution Approach 2:
The patent introduces proximity sensors as intermediary devices between the gear system and the control system. These sensors mediate the detection process by converting mechanical tooth passage into electrical signals, enabling accurate slip detection without direct mechanical contact and reducing overall system complexity.
2Object-affected harmful factors
If no slip detection system is implemented, then the device complexity is low, but harmful factors such as overload damage and safety risks increase
Solution Approach 1:
The patent implements a feedback mechanism where proximity sensors continuously monitor gear rotation and provide real-time data to the control system. When slip conditions are detected through comparison of tooth passage counts, the system can immediately trigger protective actions, creating a closed-loop control that prevents overload damage while maintaining relatively simple hardware.
Solution Approach 2:
The system performs preliminary detection of slip conditions before they can cause damage. By continuously monitoring gear synchronization and identifying anomalies in tooth passage patterns, the system can trigger protective measures in advance, preventing harmful overload conditions from developing.
3Reliability
If real-time slip monitoring is implemented, then safety and reliability improve, but the device complexity and sensor requirements increase
Solution Approach 1:
The patent divides the monitoring function into separate proximity sensors for each gear, allowing independent detection of rotation at different points in the drive train. This segmentation enables real-time slip detection through comparison of sensor readings while keeping each individual sensor simple and the overall system modular for easier maintenance.
Solution Approach 2:
The system uses identical proximity sensors at multiple locations in the gear train, creating replicated detection points. This copying approach allows real-time comparison of gear synchronization without requiring complex or specialized sensors, as the same simple sensor type is used throughout the system.
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 system effectively detects slip conditions, allowing for real-time monitoring and remediation, thereby preventing damage to the hoist, aircraft, and load, ensuring safe operation even under heavy loads.
Implementation Method 1
a first proximity sensor configured to determine a first number of teeth of the first gear that pass by the first proximity sensor within a period of time
Data Source
AI summary
A clutch assembly includes a first gear, a second gear, a first proximity sensor configured to determine a first number of teeth of the first gear that pass by the first proximity sensor within a period of time, and a second proximity sensor configured to determine a second number of teeth of the second gear that pass by the second proximity sensor within the period of time.