Scissor Lift Height Sensor Using Angular Position
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Solution Overview
Problem
Existing scissor lifts lack an efficient method to calculate and control the platform height without direct measurement, which is necessary for precise positioning and operation safety.
Innovation Solution
A scissor lift system equipped with an angle sensor to sense the angular position of a pivot pin and a processor to calculate the platform height, allowing for accurate height determination and control of the lift actuator to position the platform at desired heights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If direct height measurement is used, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
The patent uses an angle sensor as an intermediary device to measure the angular position of the scissor assembly, which indirectly provides height information through geometric calculation. This mediator approach avoids direct height measurement while achieving the required measurement precision.
Solution Approach 2:
The patent replaces direct mechanical height measurement systems with an angular measurement system combined with mathematical calculation. The angle sensor measures rotational position, and the processor calculates height using the relationship between angle and position in the scissor mechanism, substituting a simpler mechanical sensing approach.
2Productivity
If manual height measurement is used, then device complexity is reduced, but productivity decreases
Solution Approach 1:
The system performs self-measurement by using the angle sensor to automatically detect the scissor assembly position and calculate height without external intervention. The processor continuously monitors angle changes and computes platform height in real-time, enabling the system to serve its own measurement needs.
Solution Approach 2:
The angle sensor provides continuous feedback on the scissor assembly angular position to the processor, which calculates and uses this information to determine platform height. This feedback loop enables automatic, real-time height monitoring and positioning control, significantly improving productivity.
3Manufacturing precision
If manual positioning control is used, then device complexity is reduced, but manufacturing precision decreases
Solution Approach 1:
The angle sensor provides real-time feedback on the actual position of the scissor assembly to the processor. This feedback enables closed-loop control where the system can accurately determine platform position and make precise adjustments to achieve the desired manufacturing precision.
Solution Approach 2:
The patent replaces manual positioning operations with an automated control system that uses angular measurement data and mathematical calculations to precisely control platform position. This substitution of mechanical manual adjustment with computational control achieves higher positioning precision.
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
Enables precise height calculation and control of the scissor lift platform, enhancing operational safety and efficiency by eliminating the need for direct height measurement, while allowing for automatic positioning.
Implementation Method 1
an angle sensor configured to sense the angular position of a pivot pin about which the scissor leg pivots
Data Source
AI summary
A scissor lift with a height sensor system includes a scissors assembly including at least one scissor leg configured to lower and raise a platform, an angle sensor configured to sense the angular position of a pivot pin about which the scissor leg pivots, and a processor configured to calculate a height of the platform from the angular position sensed by the angle sensor. The processor may also be configured to control the lift actuator in response to the height of the platform calculated from the angular position sensed by the angular sensor. The angle sensor may be a magnetic angle sensor configured to sense the angle of a magnetic angular marker attached to the pivot pin.