Electronic Balance Virtual Weight Generation
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Solution Overview
Problem
Conventional electronic balances with built-in balance weights are costly and oversized, and they require external weights for performance confirmation, which can be cumbersome and affect measurement accuracy due to air movement and size constraints.
Innovation Solution
An electronic balance of electromagnetic force type that uses a Roberval mechanism with a beam position detecting unit and a beam equilibrium setting unit to generate an imaginary weight by altering the conversion coefficients of current/voltage converters, allowing for automatic weight placement and removal without external or built-in weights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a built-in balance weight is installed to enable automatic performance confirmation, then performance confirmation becomes easier and more reliable, but the device complexity and cost increase
Solution Approach 1:
The patent creates a virtual copy of a balance weight by manipulating the beam position detection system. Instead of installing a physical built-in balance weight, the system uses the beam position detecting unit to generate detection signals that mimic the effect of a balance weight being present, thereby achieving automatic performance confirmation without additional mechanical components
Solution Approach 2:
The patent replaces the mechanical system of physical balance weights with an electronic/optical system. The beam position detecting unit (using optical sensors) and beam equilibrium setting unit create virtual weight effects through electrical signals, substituting mechanical weight placement with electronic control of beam position detection
2Reliability
If a built-in balance weight is installed for calibration, then calibration function is improved, but the balance weight with mass close to weighing capacity is too heavy for measuring small changes
Solution Approach 1:
The patent makes the balance weight virtual and dynamic rather than fixed and static. The beam equilibrium setting unit can change the equivalent balance weight value by adjusting the beam position detection equilibrium states, allowing the system to adapt to different measurement needs (small changes or large capacity) without physical weight changes
Solution Approach 2:
The patent changes the parameter of balance weight mass from a fixed physical property to a variable electronic parameter. By adjusting the beam position detection equilibrium states, the system can vary the equivalent balance weight value to match different measurement requirements, enabling both calibration and small change measurement with the same system
3Ease of operation
If a built-in balance weight is installed, then automatic weight placement is achieved, but air movement around the drive system influences measurement values
Solution Approach 1:
The patent creates a virtual balance weight through beam position detection manipulation, eliminating the need for physical balance weight movement. The beam equilibrium setting unit generates detection signals that simulate weight placement without actual mechanical movement, thereby avoiding air convection and measurement errors
Solution Approach 2:
The patent replaces the mechanical movement of balance weights with electronic manipulation of beam position detection. The beam equilibrium setting unit electronically adjusts detection equilibrium states to simulate weight placement, substituting mechanical motion with electronic control and eliminating air movement interference
4Reliability
If a built-in balance weight is installed in a line-installed balance, then performance confirmation is enabled, but the balance increases in size
Solution Approach 1:
The patent creates a virtual balance weight through beam position detection manipulation, eliminating the need for physical built-in balance weights. This virtual approach enables performance confirmation without occupying additional space, making the balance compact and suitable for line installation
Solution Approach 2:
The patent extracts the essential function of a built-in balance weight (enabling automatic performance confirmation) from its physical form. By using beam position detection manipulation, the system retains the functional benefit while removing the spatial burden, allowing compact balance design
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 enables precise performance confirmation and calibration with minimal size and cost, reducing air movement influences and allowing for compact designs, while maintaining accurate measurement capabilities.
Implementation Method 1
light receiving elements, having photovoltaic effect, disposed on the other side via the window and disposed in upper and lower sides of the window
Data Source
AI summary
Provided is an electronic balance of electromagnetic force type including a weight automatic loading mechanism which can place and remove a weight by its own mechanism without use of either an external balance weight or a built-in balance weight. An electronic balance of electromagnetic force type is provided with a beam equilibrium setting unit that sets two or more equilibrium states of the beam position detecting unit. By making conversion ratios of upper and lower light receiving circuits nonequivalent, an imaginary weight is generated by utilizing the operating principle of the electromagnetic balance of electromagnetic force type.