Aerial Lift Control Input Apparatus High Electrical Resistance
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Solution Overview
Problem
Aerial lift systems and control input apparatuses face challenges in providing responsive and safe control inputs, especially when operating in environments with electromagnetic fields, such as near electrical transmission lines, due to existing technologies not adequately addressing operator safety and ease of use, particularly when wearing gloves.
Innovation Solution
The development of control input apparatuses with a control lever assembly that includes a position sensor and an interlock sensor, allowing for actuation at an actuation threshold position between non-actuated and fully-actuated positions, and a control input modulator that modulates control inputs based on the position and movement of the control input element, enhancing operator safety and responsiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control input apparatuses are made electrically conductive for safety grounding, then operator safety is improved, but electrical discharge risk increases in electromagnetic environments
Solution Approach 1:
The control input apparatus utilizes materials with high electrical resistance (greater than 1000 ohms) to change the electrical parameter of the control lever assembly. This parameter change allows the apparatus to block electrical discharge while maintaining operator safety through controlled electrical isolation, resolving the contradiction between safety grounding and discharge risk in electromagnetic environments.
2Measurement precision
If interlock sensors require full actuation for release, then control precision is improved, but ease of operation deteriorates when wearing gloves
Solution Approach 1:
The interlock sensor is designed to release at a partial actuation threshold position (between non-actuated and fully-actuated positions) rather than requiring full actuation. This partial action principle allows operators wearing gloves to easily activate the control input element while maintaining sufficient control precision through the position sensor's ability to detect the threshold position and modulate control inputs accordingly.
3Speed
If control inputs are modulated based on position sensor data, then control responsiveness is improved, but device complexity increases
Solution Approach 1:
The control input apparatus implements feedback by using position sensors to detect the position and movement of control levers, then modulating control inputs based on this detected information. The interlock sensor provides feedback on actuation threshold achievement, enabling responsive control adjustment without requiring complex mechanical systems, as the feedback loop is achieved through electrical sensing and signal processing.
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 solution provides improved operator safety and ease of use by ensuring high electrical resistance, reducing the risk of electrical discharges, and enhancing control precision, even in hazardous electromagnetic environments.
Implementation Method 1
Aerial lift systems and control input apparatuses with high electrical resistance for use with aerial lift systems
Data Source
AI summary
A control input apparatus for operating an aerial lift system includes a control lever assembly that has at least one control lever and at least one position sensor. The at least one position sensor may indicate a position and/or a movement of the at least one control lever. The control input apparatus additionally incudes a control input element actuatable over a movement range from a non-actuated position to a fully-actuated position, and at least one interlock sensor that releases an interlock corresponding to the control lever assembly upon the control input element being actuated at least to an actuation threshold position located between the non-actuated position and the fully-actuated position. Upon the control input element being actuated at least to the actuation threshold position, the control input apparatus provides control inputs corresponding to the position and/or the movement of the control lever indicated by the at least one position sensor.