Telescoping Boom Amplitude Control for Overload and Extension Alarms
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Solution Overview
Problem
Existing aerial work platforms face challenges in rapidly resolving safety hazards and ensuring continuous production when the telescopic boom extends from a heavy-load curve to a light-load curve, as simultaneous overload and over-extension alarms can render the vehicle inoperable, necessitating shutdown and inspection.
Innovation Solution
A method and system that control the telescoping amplitude by detecting current travel stages and load limits, triggering overload alarms for excessive loads and over-extension alarms at critical positions, allowing controlled retraction and preventing further extension to ensure safety and continuous operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the telescopic boom extends from heavy-load curve to light-load curve, then the working amplitude is improved, but both overload and over-extension alarms are triggered simultaneously making the vehicle inoperable
Solution Approach 1:
The alarm system is segmented into distinct functional modules: overload detection module, over-extension detection module, and control module. Each module independently detects its specific parameter (load weight or extension position) and triggers appropriate alarms. The control module processes alarm signals separately and enables selective cancellation, allowing operators to resolve individual alarm conditions without complete system shutdown.
Solution Approach 2:
The system dynamically adjusts alarm response based on the specific alarm condition triggered. When only over-extension alarm is triggered, the system allows retraction to cancel the alarm. When only overload alarm is triggered, retraction is permitted. The control logic dynamically determines which recovery actions are permitted based on real-time alarm state, enabling continuous operation while maintaining safety.
2Reliability
If the telescopic boom is locked to prevent overload, then safety is improved, but continuous production is disrupted requiring shutdown and inspection
Solution Approach 1:
The system implements feedback control through independent alarm detection and selective cancellation mechanisms. The overload detection module and over-extension detection module continuously monitor their respective parameters and provide feedback to the control module. When alarm conditions are resolved (either by retracting the boom or adjusting load), the system provides feedback to cancel specific alarms without requiring complete shutdown, enabling continuous production while maintaining safety through real-time monitoring and responsive control.
3Reliability
If both overload and over-extension alarms are triggered simultaneously, then safety monitoring is comprehensive, but the telescopic boom cannot be retracted to cancel alarms
Solution Approach 1:
The alarm system is segmented into distinct functional modules: overload detection module, over-extension detection module, and control module. Each module independently detects its specific parameter (load weight or extension position) and triggers appropriate alarms. The control module processes alarm signals separately and enables selective cancellation, allowing operators to resolve individual alarm conditions without complete system shutdown.
Solution Approach 2:
The system dynamically adjusts alarm response based on the specific alarm condition triggered. When only over-extension alarm is triggered, the system allows retraction to cancel the alarm. When only overload alarm is triggered, retraction is permitted. The control logic dynamically determines which recovery actions are permitted based on real-time alarm state, enabling continuous operation while maintaining safety.
Data Source
Figure 1
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AI summary
A method and system for controlling the telescoping amplitude of an aerial work platform. The method comprises: acquiring a current telescoping travel of a telescopic arm (5) and a corresponding travel stage to which same belongs; judging whether a load of a work basket (6) is greater than a rated load upper limit corresponding to the current travel stage of the telescopic arm; if so, triggering an overload warning and locking the telescopic arm, and if not, when the current telescoping travel of the telescopic arm (5) reaches a critical position of the current travel stage and a subsequent travel stage, triggering an amplitude exceeding warning, and limiting outward stretching movement of the telescopic arm. The system can ensure that the telescopic arm can timely and rapidly perform response motion such as retraction.