Construction Work Management With Position-Based Load Verification

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Solution Overview

Problem

Conventional construction management systems inaccurately ascertain the total amount of load transported from a construction site due to false determinations of loading and transport work based on radio wave intensity thresholds, leading to incomplete load calculations.

Innovation Solution

A construction management system utilizing a transport vehicle position detection device, loading machine position detection device, and weight detection device to accurately calculate load weight based on chronological position and weight information.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Extent of automation

If radio wave intensity threshold is used to determine loading work, then the system can automatically detect approach events, but the determination becomes inaccurate when loading work is not actually implemented

Engineering Contradiction:

Improveautomatic detection of approach eventsVSAvoidaccuracy of loading work determination

Core Design Contradiction:

Extent of automationVSMeasurement precision

Solution Approach 1:

The patent introduces an intermediary verification mechanism by checking whether the transport vehicle actually departs after approach. The work management unit only determines loading work as implemented when both approach is detected (radio wave intensity threshold) AND subsequent departure is observed, filtering out false positives where vehicles merely approach without loading.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system uses feedback from subsequent vehicle departure behavior to validate the initial loading work determination. By monitoring whether the transport vehicle actually leaves the construction site after approaching, the system refines its determination accuracy and corrects false positives from simple threshold-based detection.

Inventive Principle:

Principle #23Feedback

2Ease of manufacture

If total load is calculated based on maximum payload capacity and approach/withdrawal counts, then calculation is simple, but the total amount of load transported cannot be accurately ascertained

Engineering Contradiction:

Improvesimplicity of load calculation methodVSAvoidaccuracy of total load transported

Core Design Contradiction:

Ease of manufactureVSMeasurement precision

Solution Approach 1:

The patent replaces the mechanical counting method (simple increment/decrement based on approach/withdrawal) with a verification-based system that uses radio wave intensity thresholds and departure detection to validate each loading event, ensuring only actual loading work contributes to the total load calculation.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The work management unit automatically verifies and validates loading work determinations by monitoring subsequent vehicle departure behavior, eliminating the need for manual verification and ensuring accuracy without adding complex external validation systems.

Inventive Principle:

Principle #25Self-service

3Extent of automation

If radio wave intensity threshold is used to determine transport work start, then the system can automatically detect transport events, but false determinations occur when loading work is not actually implemented

Engineering Contradiction:

Improveautomatic detection of transport eventsVSAvoidaccuracy of transport work determination

Core Design Contradiction:

Extent of automationVSReliability

Solution Approach 1:

The system performs preliminary detection of approach events using radio wave intensity thresholds, then waits for subsequent departure behavior to confirm actual transport work. This two-stage process ensures that transport work is only determined when both approach and departure are observed, preventing false determinations.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system uses feedback from the absence or presence of vehicle departure to validate transport work determinations. By monitoring whether the transport vehicle actually leaves the construction site after approach, the system ensures accurate transport work determination and eliminates false positives.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12450528B2Work management system

Publication Date: 2025.10.21 HITACHI CONSTRUCTION MACHINERY CO LTD

AI summary

The present disclosure provides a construction management system capable of ascertaining information about a construction site more accurately than before. A construction management system 100 comprises: a position sensor 16a detecting position information about a transport vehicle 10 that transports payload; a position sensor 26 detecting position information about a loading machine 20 that loads payload onto the transport vehicle 10; a weight detection device 120 detecting weight information about the payload held by the loading machine 20; and an information management controller 130 which, based on chronological information of the position information about the transport vehicle 10, chronological information of the position information about the loading machine, and chronological information of the weight information, calculates the load weight of the payload loaded onto the transport vehicle 10.