Load-Sensing Vehicle Lift Speed Control for Safer Fast Lifting
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Solution Overview
Problem
Vehicle lifts currently require significant time and labor to lift vehicles due to the need for manual positioning and continuous monitoring, leading to inefficiencies in high-volume service environments.
Innovation Solution
A control system that adjusts lift speed based on vehicle weight using variable frequency drives, pulse width modulation, and sensors to optimize lift speed, allowing for automatic speed control and reducing labor costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual positioning and continuous monitoring are used during vehicle lifting, then safety and proper engagement are ensured, but labor time and operational complexity increase significantly
Solution Approach 1:
The lift system performs self-positioning through automated sensors and actuators that detect vehicle presence and adjust lift arms to proper engagement positions without technician intervention. The system monitors its own operation and makes corrections autonomously, eliminating the need for continuous manual monitoring while maintaining safety through automated oversight.
Solution Approach 2:
Manual mechanical positioning and monitoring operations are replaced with automated electronic control systems, sensors, and actuators. The control system uses electronic signals to position lift arms and monitor engagement status, substituting human mechanical actions with automated electromechanical systems that reduce labor time while ensuring proper engagement through precise electronic control.
2Productivity
If lift speed is increased to improve productivity, then labor costs decrease, but safety control and load stability may be compromised
Solution Approach 1:
The lift system dynamically adjusts its operating speed based on real-time conditions such as load weight, vehicle type, and engagement status. The control system modifies lift speed during operation rather than using a fixed speed, allowing faster lifting when conditions permit while automatically reducing speed when safety considerations require more cautious operation. This dynamic adaptation resolves the contradiction between productivity and safety control.
Solution Approach 2:
The system continuously monitors lift operation through sensors that detect load position, engagement status, and system parameters. This feedback information is fed back to the control system, which automatically adjusts lift speed to maintain safe operation while maximizing productivity. The closed-loop control ensures that safety requirements are met while achieving high lifting speeds when conditions allow.
3Loss of time
If automated speed control systems are implemented, then labor costs and operational time are reduced, but system complexity increases
Solution Approach 1:
The automated control system is designed to handle multiple functions including position detection, speed control, safety monitoring, and emergency response within a single integrated platform. By consolidating these functions into one multi-functional system rather than separate dedicated systems, the patent reduces overall system complexity while achieving automated speed control and reduced operational time.
Solution Approach 2:
The system achieves automated control by monitoring and adjusting key parameters such as lift speed, position, and load weight through sensors and actuators. By focusing control efforts on these critical parameters rather than controlling every aspect of the system, the patent implements effective automation with manageable complexity. The control system modifies operational parameters dynamically to achieve time savings without requiring overly complex system architecture.
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 significantly reduces labor costs by enabling faster vehicle lifting, potentially decreasing labor time by over 20% in high-volume service environments, resulting in substantial time and cost savings.
Implementation Method 1
A lift system and method are disclosed that automatically determine and adjust motor speed as a function of supported load
Implementation Method 2
A lift system and method are disclosed that automatically determine and adjust motor speed as a function of supported load
Data Source
AI summary
Conventional vehicle lifts typically operate at a standard speed that is statically configured for the system, which may result in vehicles that are below the weight rating for the lift being raised at the standard speed while the lift motor is capable of safely raising at greater speeds. A set of lift controls may be configured to determine the load on the motor by a vehicle of an unknown weight during operation at a standard lift speed and use such information to determine a potential speed that the motor may raise the vehicle at while staying within safe operational levels for the motor. One or more of a magnitude of electrical power drawn, a pressure generated by a hydraulic lifting, or a sensed vehicle weight may be used to provide an indication of load on the motor and/or a higher potential speed.