Dual Elastic Member Digital Scale Sensor
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Solution Overview
Problem
Conventional digital scales experience decreased accuracy due to physical deformation of springs or elastic members over time, leading to mechanical failure, and attempts to increase thickness to minimize distortion often compromise overall accuracy.
Innovation Solution
A digital scale design featuring a plurality of weight sensors with a first and second sensing mechanism, where the first elastic member is driven to push a second elastic member when an external load exceeds a threshold, distributing the load and preventing excessive deformation, combined with a central processing unit to process electrical signals from movement detection devices for accurate weight measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the thickness of elastic members is increased to minimize distortion, then the reliability of the weight sensor is improved, but the measurement precision of the digital scale deteriorates
Solution Approach 1:
The patent divides the sensing mechanism into two separate elastic members (first elastic member and second elastic member) instead of using a single thick elastic member. Each elastic member has a thickness of 0.5-1.5mm, and they work together to sense weight, thereby maintaining measurement precision while improving reliability through load distribution.
2Device complexity
If a single weight sensor is used to simplify the device structure, then the device complexity is reduced, but the reliability of the sensing mechanism deteriorates due to excessive deformation
Solution Approach 1:
The patent segments the single sensor function into two elastic members working in parallel. This segmentation allows the system to maintain simplicity while improving reliability, as the load is distributed across multiple components rather than concentrated in one.
Solution Approach 2:
The patent combines multiple elastic members into a unified sensing system where the first and second elastic members work together. The weight sensing function is merged across these components, achieving improved reliability without significantly increasing device complexity.
3Reliability
If multiple weight sensors are used to distribute load and prevent damage, then the reliability of the digital scale is improved, but the device complexity increases
Solution Approach 1:
The patent merges multiple elastic members into a coordinated sensing system where the first and second elastic members work together under a single weighing platform. This approach achieves load distribution and improved reliability while maintaining relatively simple device structure through unified control and processing.
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 design effectively distributes the external load among multiple sensing mechanisms, preventing damage and maintaining accuracy without the need to increase the thickness of elastic members, thus enhancing measurement precision and extending the lifespan of the digital scale.
Implementation Method 1
a first elastic member movably attached on the first securing member... a second elastic member movably attached on the second securing member... when an external load which is greater than a predetermined threshold is applied on the weighing platform, the first elastic member is arranged to be driven to move by the external load and push the second elastic member to move
Implementation Method 2
a first movement detection device connected to the first elastic member, the first movement detection device being arranged to transform a movement of the first elastic member to a corresponding first electrical signal... a second movement detection device connected to the second elastic member, the second movement detection device being arranged to transform a movement of the second elastic member to a corresponding second electrical signal
Data Source
AI summary
A digital scale includes a weighing platform, a plurality of weight sensors, and a central processing unit. Each of the weight sensors includes a first sensing mechanism and a second sensing mechanism. The first sensing mechanism includes a first elastic member, and a first movement detection device arranged to transform a movement of the first elastic member to a first electrical signal. The second sensing mechanism includes, a second elastic member and a second movement detection device arranged to transform a movement of the second elastic member to a second electrical signal. When an external load greater than a predetermined threshold is applied on the weighing platform, the first elastic member is arranged to be driven to move and in turn pushes the second elastic member to move. A measurement of the external load is obtained by combining and the first electrical signal and the second electrical signal.