Road Paving Machine Positioning Feedback for Construction Accuracy

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Solution Overview

Problem

Existing road paving machines suffer from degraded construction accuracy due to reduced estimation accuracy of the current position, which is not adequately addressed by current technologies.

Innovation Solution

A road paving machine equipped with a control device that estimates the current position and a steering device, capable of outputting information related to the data amount available for estimation, along with a management system that includes a communication terminal and remote management device to monitor and manage the paving process, allowing for real-time recognition and recovery of positioning data reliability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Extent of automation

If the current position is estimated using GNSS receiver, then the road paving machine can automatically control compaction performance, but construction accuracy degrades when estimation accuracy of current position is reduced

Engineering Contradiction:

Improveautomatic compaction controlVSAvoidconstruction accuracy

Core Design Contradiction:

Extent of automationVSManufacturing precision

Solution Approach 1:

The system continuously monitors positioning data amount and provides feedback to the control device. When positioning data amount falls below a threshold, the system alerts the operator to take corrective action, ensuring construction accuracy is maintained through real-time feedback on positioning reliability

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system performs preliminary assessment of positioning data quality before construction operations proceed. By evaluating the data amount available for position estimation in advance and setting threshold values, the system prevents construction accuracy degradation before it occurs

Inventive Principle:

Principle #10Preliminary action

2Productivity

If positioning data amount is insufficient, then position estimation accuracy degrades, but the system continues operation without operator awareness

Engineering Contradiction:

Improvecontinuous operationVSAvoidposition estimation accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The control device continuously monitors positioning data amount and provides real-time feedback to the operator through alerts or warnings. This ensures operator awareness of positioning quality issues while maintaining continuous operation, allowing timely corrective actions

Inventive Principle:

Principle #23Feedback

3Manufacturing precision

If multiple positioning data sources are used to maintain accuracy, then system complexity increases

Engineering Contradiction:

Improveconstruction accuracyVSAvoidpositioning system complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The control device performs multiple functions: it controls compaction performance, monitors positioning data amount, evaluates position estimation accuracy, and provides operator alerts. This multi-functionality consolidates multiple subsystems into a single control device, managing complexity while maintaining accuracy

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentEP4579039A1Road paving machine and management system

Publication Date: 2025.07.02 SUMITOMO CONSTRUCTION MACHINERY

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AI summary

Provided is a road paving machine capable of suppressing degradation of construction accuracy. The road paving machine including a tractor (1) includes a control device (50) that estimates a current position of the road paving machine and a steering device (65) that steers the tractor (1), based on the current position. The control device (50) is configured to output information related to a data amount available for estimating the current position.