Electronic Balance Calibration Under Actual Door-Operation Conditions

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Solution Overview

Problem

Existing electronic balances with windshields cannot accurately determine their weighing performance under actual use conditions due to standard deviation measurements being taken with the windshield closed, which differs from actual weighing operations.

Innovation Solution

An electronic balance with a door opening and closing mechanism, a built-in weight mechanism, and a control unit that simulates actual use by repeatedly opening and closing the door, loading and unloading the built-in weight, and measuring standard deviation under these conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If standard deviation is measured with the windshield closed, then measurement precision is improved, but the measurement no longer reflects actual use conditions

Engineering Contradiction:

Improvestandard deviation measurementVSAvoidactual use condition reflection

Core Design Contradiction:

Measurement precisionVSAdaptability or versatility

Solution Approach 1:

The patent applies the dynamics principle by making the windshield door movable between closed and open states during measurement. The door opening and closing mechanism dynamically changes the measurement conditions to match actual use scenarios, transforming a static measurement system into one that can adapt to different operational states.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the physical state parameter of the windshield door from closed to open during the measurement process. By altering this key parameter, the system measures standard deviation under conditions that reflect actual use, where the door is opened for loading/unloading objects, rather than remaining closed throughout.

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If the door is opened during weighing, then ease of operation is improved, but weighing accuracy deteriorates

Engineering Contradiction:

Improveobject loading and unloadingVSAvoidweighing accuracy

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The patent implements periodic action by repeatedly opening and closing the door during the measurement process. This periodic operation simulates the actual use pattern where the door is opened for loading/unloading and then closed for measurement, creating multiple measurement cycles that reflect real operational conditions.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent maintains continuity of useful action by integrating the door opening/closing operations into the measurement process itself. The door is opened for loading/unloading the built-in weight, then closed and measurement is taken, creating a continuous sequence of operations that mirrors actual use without requiring separate measurement phases.

Inventive Principle:

Principle #20Continuity of useful action

3Ease of operation

If automatic door opening and closing is implemented, then ease of operation is improved, but device complexity increases

Engineering Contradiction:

Improveautomatic door controlVSAvoiddoor opening and closing mechanism

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent applies self-service by having the door opening and closing mechanism automatically control the door based on the weighing process requirements. The system autonomously opens the door when the built-in weight needs to be loaded or unloaded, and closes it when measurement should be taken, eliminating the need for manual door operation.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent merges the door control function with the weighing process control. The door opening and closing mechanism is integrated into the existing control system that manages the built-in weight application and removal, combining multiple control functions into a unified system rather than adding completely separate control mechanisms.

Inventive Principle:

Principle #5Merging (Combining)

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

The balance can confirm its weighing performance under conditions similar to actual use, allowing users to assess and improve performance based on actual use standard deviation.

Implementation Method 1

a weight sensor to which a load applied to the weighing pan is transmitted

Methodology Applied

Scientific EffectForce transmission: Mechanical Force

Data Source

PatentUS12504316B2Method for confirming weighing performance of balance, and balance for the same

Publication Date: 2025.12.23 A&D CO LTD

AI summary

In order to achieve the object described above, an electronic balance includes a weighing pan, a windshield, door opening and closing mechanisms configured to automatically open and close doors of the windshield, a weight sensor, a built-in weight, a weight applying and removing mechanism for the built-in weight, and a control unit, the control unit measures a standard deviation of the built-in weight as an actual use standard deviation (SDreal) accompanied by a series of opening and closing operations consisting of opening the door by the door opening and closing mechanism, loading the built-in weight by the weight applying and removing mechanism, closing the door by the door opening and closing mechanism, acquiring weighing data of the built-in weight, opening the door by the door opening and closing mechanism, unloading the built-in weight by the weight applying and removing mechanism, and closing the door by the door opening and closing mechanism.