Carrying Arm Weight Sensing for Accurate 3D Motion Measurement

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Solution Overview

Problem

Conventional weight measurement methods using force sensors are limited to specific measurement targets and lack versatility, and measuring a moving target is impractical due to operational constraints and accuracy issues.

Innovation Solution

A weight measurement system that includes a force sensor attached to a carrying arm, which obtains output signals while moving three-dimensionally, processes them with an information processing device to derive weight data, and outputs it to an external entity, enabling accurate weight measurement of various targets.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If conventional force sensor methods are used, then measurement is simple, but versatility is limited to specific measurement targets

Engineering Contradiction:

ImproveversatilityVSAvoidsystem complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The system integrates multiple functions into a single measurement system. The force sensor is combined with motion detection capabilities (acceleration sensors or position detection) to enable weight measurement of various measurement targets including moving objects, stationary objects, and objects on inclined surfaces, making the system universally applicable across different measurement scenarios

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system uses an intermediary processing approach where detection results from the force sensor and motion detection are combined through a specific calculation method. The weight derivation section processes the force sensor output while compensating for motion effects using acceleration or position data, enabling accurate weight measurement of moving objects without requiring direct contact measurement

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If measurement is performed on moving targets, then versatility improves, but measurement accuracy deteriorates due to operational constraints

Engineering Contradiction:

Improvemeasurement target rangeVSAvoidweight measurement accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The system incorporates feedback by continuously monitoring both the force sensor output and the motion state (acceleration or position) of the measurement target. The weight deriving section uses this feedback information to dynamically adjust the weight calculation, compensating for motion effects and maintaining measurement accuracy even when the target is moving

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system replaces traditional mechanical contact-based weight measurement with a combined sensor approach. Instead of relying solely on force sensor data which becomes unreliable during motion, the system substitutes in acceleration sensor data or position detection results to calculate and compensate for motion-induced force variations, thereby maintaining measurement accuracy

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of operation

If measurement target moves three-dimensionally, then operational flexibility improves, but measurement reliability deteriorates

Engineering Contradiction:

Improveoperational flexibilityVSAvoidmeasurement reliability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The system is designed to be dynamic rather than static. It continuously adapts to the motion state of the measurement target by real-time processing of force sensor data combined with acceleration or position information. This dynamic approach allows the system to maintain reliable weight measurement regardless of whether the target is stationary, moving in a straight line, or moving three-dimensionally

Inventive Principle:

Principle #15Dynamics

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

Enables versatile and accurate weight measurement of moving targets using a force sensor, applicable to diverse weights and allowing control of the carrying arm based on measured weights.

Implementation Method 1

a force sensor attachable to a gripping part of a carrying arm carrying an article by gripping; a first obtaining section configured to obtain an output signal from the force sensor when the gripping part that is gripping the article moves three-dimensionally

Methodology Applied

Scientific EffectForce sensor detection: Force

Data Source

PatentUS20260063463A1Weight measurement system, information processing device, and weight measurement method

Publication Date: 2026.03.05 SINTOKOGIO LTD

AI summary

A weight measurement system includes: a force sensor attachable to a gripping part of a carrying arm carrying an article by gripping; a first obtaining section configured to obtain an output signal from the force sensor when the gripping part that is gripping the article moves three-dimensionally; a weight deriving section configured to derive weight data indicating a weight of the article by processing the output signal; and an output section configured to output the weight data to an external entity.