Multi-Component Load Cell Calibration With Pulley-Based Multidirectional Loads
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Solution Overview
Problem
Existing load cell calibration devices are limited in their ability to accurately calibrate multidirectional forces and moments, particularly in multi-component load cells, necessitating improved precision and reliability in experimental data.
Innovation Solution
A multi-component load cell calibration device comprising a base plate, pillars, a rotation table, pulleys, actuators, and load cells that allow for the application of loads in various directions to calibrate forces and moments across all axes, using a wire cable system to apply loads through actuators and measure components in specific directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional load cell calibration device is used, then the device structure is simple, but the measurement precision and reliability of multidirectional forces and moments are insufficient
Solution Approach 1:
The calibration device is divided into multiple independent functional modules: a rotation table for angular positioning, multiple actuators (first, second, and third actuators) for applying forces along different axes, and multiple load cells for measuring forces in specific directions. Each module operates independently to contribute to the overall calibration capability, enabling precise control and measurement of multidirectional forces and moments through coordinated action of segmented components.
Solution Approach 2:
The calibration device transitions from single-axis or limited-direction calibration to three-dimensional multidirectional calibration by introducing rotational capability through the rotation table and adding actuators positioned along multiple axes. The first actuator applies force along the first axis, the second actuator along the second axis, and the third actuator along the third axis, enabling comprehensive calibration of forces and moments in all spatial dimensions.
2Measurement precision
If actuators are positioned at specific locations, then measurement precision is improved, but device complexity increases due to multiple actuators and load cells
Solution Approach 1:
The rotation table serves multiple functions: it positions the load cell adapter for calibration, supports the multi-component load cell, and enables rotational movement to align measurement axes with applied force directions. The load cell adapter also performs multiple roles: it couples the load cell to the rotation table, provides a mounting interface, and rotates with the load cell to maintain proper orientation during calibration. This multi-functionality reduces the need for separate dedicated components.
Solution Approach 2:
The load cell adapter acts as an intermediary component between the rotation table and the multi-component load cell. It facilitates the coupling of these components and enables rotational movement while maintaining the structural integrity and measurement accuracy of the system. The adapter mediates the interaction between rotational positioning and force measurement, allowing precise calibration without direct rigid coupling.
3Reliability
If multiple load cells are used to measure forces in different directions, then measurement precision is improved, but the device becomes more complex
Solution Approach 1:
Multiple load cells are integrated into a single multi-component load cell assembly that measures forces along multiple axes simultaneously. The first load cell measures force along the first axis, the second load cell measures force along the second axis, and the third load cell measures force along the third axis. By combining these measurement capabilities into one integrated component mounted on the rotation table, the device achieves comprehensive force measurement without proportionally increasing system complexity.
Data Source
AI summary
A multi-component load cell calibration device includes a base plate, a first pillar and a second pillar disposed on the base plate, a third pillar connecting the first pillar and the second pillar, a rotation table, a first pulley, a second pulley, a third pulley, a fourth pulley, a load cell adapter in which the first pulley and the second pulley are arranged, a pulley pillar in which the third pulley and the fourth pulley are arranged, a wire cable wound around at least one pulley, a first actuator that applies a load to the wire cable, a wire bracket connected to the wire cable, and a second actuator that applies a load to the pulley pillar.