Elevator Load Sensor on Deflecting Roller Axle
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Solution Overview
Problem
Elevator installations with deflecting rollers struggle to accurately measure the useful load with existing load measuring systems, which are often costly and require complex integration, especially when dealing with asymmetrical load distributions.
Innovation Solution
A load sensor is arranged centrally between two deflecting rollers on a common axle, measuring the bending deformation to accurately determine the useful load, allowing for simple and economic integration, and enabling precise measurement regardless of load distribution. The axle is designed to produce a suitable bending deformation matched to the load sensor's measurement range, considering material characteristics, and can be pre-assembled with the deflecting rollers into a unit for reduced installation costs and errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If load measuring systems are arranged in the car floor using deformations or spring deflections, then load measurement is possible, but the system becomes costly and complex to integrate
Solution Approach 1:
The load measurement function is extracted from the car floor structure and relocated to the deflecting roller unit. By placing the load sensor on the common axle of the deflecting rollers, the measurement system is separated from the complex car floor assembly, simplifying integration while maintaining measurement capability
Solution Approach 2:
The common axle of the deflecting rollers serves as an intermediary element that transfers the load information from the support means to the load sensor. This intermediary structure enables measurement without requiring direct integration into the car floor, reducing complexity
2Measurement precision
If load measuring systems use stress measuring elements on load-bearing structures, then load measurement is possible, but the system becomes costly and complex to integrate
Solution Approach 1:
The load measurement function is extracted from the load-bearing structures and relocated to the deflecting roller unit. This separation allows the use of simpler, more economical sensors on the axle rather than complex stress measuring elements embedded in structural components
Solution Approach 2:
The invention uses economical load sensors on the common axle instead of expensive stress measuring elements. The deflecting roller unit with integrated sensor can be manufactured and replaced as a simpler assembly, reducing overall system cost
3Measurement precision
If multiple load sensors are used to account for asymmetrical load distribution, then measurement accuracy improves, but system complexity and cost increase
Solution Approach 1:
Multiple measurement functions are merged into a single load sensor placement. By positioning one sensor at the center of the common axle, the system simultaneously accounts for symmetrical and asymmetrical load distributions, eliminating the need for multiple sensors while maintaining accuracy
Solution Approach 2:
The invention changes the measurement parameter location from the car floor to the common axle of the deflecting rollers. This parameter change allows a single sensor to capture load information that would otherwise require multiple sensors distributed throughout the car structure
4Measurement precision
If complex load measuring systems are integrated into the car, then measurement capability is achieved, but integration time and cost increase
Solution Approach 1:
The elevator system is segmented into modular units, with the load measurement function integrated into the deflecting roller unit as a separate module. This segmentation allows the measurement system to be pre-assembled and tested independently, then installed as a complete unit, reducing on-site integration time
Solution Approach 2:
The load sensor and deflecting rollers are pre-assembled into a complete unit before installation. This preliminary assembly allows for quality control and calibration to be performed in advance, eliminating complex on-site integration procedures and reducing installation time
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
This solution allows for accurate and cost-effective load measurement in elevator installations, enabling precise determination of the useful load and preventing overloads, which helps in optimizing the drive torque and reducing start-up jolts, while also allowing for real-time monitoring and warning systems.
Implementation Method 1
a single load sensor is arranged centrally between the two deflecting rollers and the load sensor measures a bending deformation of the common axle
Data Source
AI summary
An elevator installation and a method for arranging a load sensor in the elevator installation includes a car, a support device for supporting the car, the load sensor and a deflecting roller unit. The deflecting roller unit is arranged at the car and has at least two deflecting rollers which are rotatable about a common axle. The load sensor is arranged on the common axle between the two deflecting rollers.