Load Measuring Device for Elastic Member Initial Load Error
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Solution Overview
Problem
Existing load measuring devices for elastic members, such as close contact springs, face measurement errors due to initial loads when the springs are held by holding parts, as these springs often have varying outer diameters and natural inclinations, causing bending and incorrect load readings.
Innovation Solution
A load measuring device and method that uses a pair of holding parts, a driving mechanism, a load measuring component, and a controlling system to adjust the holding parts' distance relative to an initial position, setting the initial load to zero before measuring the load during stretching, thereby eliminating measurement errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a pair of holding parts holds the elastic member at both ends, then the elastic member can be stretched and measured, but an initial load acts on the holding parts causing measurement error
Solution Approach 1:
The controlling part performs a preliminary action by adjusting the holding parts to a specific initial position before the actual measurement begins. This preliminary positioning ensures that the initial load is set to a known value (zero), eliminating the measurement error that would otherwise occur when the elastic member is first held by the bending holding parts
2Measurement precision
If the holding parts are fixed in position, then the device structure is simple, but the initial load cannot be adjusted to zero
Solution Approach 1:
The holding parts are made dynamically adjustable rather than fixed. The driving part enables the holding parts to move along the measurement axis, allowing the initial position to be adjusted to compensate for the elastic member's natural inclination and ensure accurate initial load measurement
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 approach ensures accurate load measurement by eliminating the impact of initial loads, allowing for precise determination of the elastic member's tension and spring constant, significantly improving measurement accuracy and reducing variations in measured tensions.
Implementation Method 1
measure a load of an elastic member... when stretching an elastic member such as a spring
Data Source
AI summary
Provided is a load measuring device and a load measuring method, capable of preventing a measuring error caused by an initial load in a state where an elastic member is held by a pair of holding parts when a load of the elastic member at the time of stretching is measured. A pair of holding parts 5, 7 are caused to approach or space away with respect to each other relatively to an initial position at which the pair of the holding parts hold a close contact spring S, thereby making an initial load measured at the initial position zero, the pair of holding parts 5, 7 are caused to space away with respect to each other from a starting position being a position at which the initial load becomes zero, and a load at a time of stretching is caused to be measured.