Compaction Ground Force Tracking for Consistent Quality

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Solution Overview

Problem

Existing compaction management systems fail to accurately manage the compaction state of target ground due to insufficient tracking of compaction pressing force and frequency, leading to inconsistent compaction quality.

Innovation Solution

A compaction management system that includes a work machine with posture and pressure detectors, a compaction-pressing-position and force calculation unit, a record production unit, a storage device, and a selection unit to identify the maximum compaction pressing force at each position, ensuring accurate compaction state management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If compaction management is based only on compaction time, then the system is simple to operate, but the compaction pressing force cannot be accurately managed

Engineering Contradiction:
Improvesimplicity of compaction managementVSAvoidaccuracy of compaction pressing force management
Core Design Contradiction:
Ease of operationVSMeasurement precision

Solution Approach 1:

The patent replaces simple time-based management with a sensor-based measurement system that detects compaction pressing force. Pressure sensors mounted on the compaction device directly measure the force applied to the ground, substituting mechanical estimation with precise electronic measurement.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces a management server as an intermediary that collects data from multiple compaction devices, calculates compaction states, and provides standardized management. This intermediary layer integrates complex measurements while keeping individual device operations simple.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Device complexity

If compaction management tracks only the number of passes, then the system requires minimal sensors, but the target compaction pressing force cannot be judged

Engineering Contradiction:
Improvenumber of sensors and system componentsVSAvoidquality consistency of compaction
Core Design Contradiction:
Device complexityVSManufacturing precision

Solution Approach 1:

The patent replaces pass-counting methods with direct force measurement using pressure sensors. This substitution enables precise monitoring of compaction pressing force at each location, ensuring quality consistency without significantly increasing system complexity.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent implements feedback mechanisms where compaction state information is transmitted to a management server, which can provide guidance on whether target compaction has been achieved. This feedback loop ensures quality control while maintaining reasonable system complexity.

Inventive Principle:
Principle #23Feedback

3Loss of information

If multiple compaction pressing records are stored for each position, then the data is comprehensive for analysis, but the system complexity and data management burden increase

Engineering Contradiction:
Improvecompleteness of compaction dataVSAvoiddata management system complexity
Core Design Contradiction:
Loss of informationVSDevice complexity

Solution Approach 1:

The patent introduces a management server as an intermediary that handles the complexity of storing and processing multiple compaction records. The server consolidates data from multiple devices, manages the comprehensive information, and presents processed results, shielding individual devices from data management complexity.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The management server performs multiple functions: collecting data from various devices, storing comprehensive records, calculating compaction states, and providing management information. This universal system handles data complexity centrally while keeping individual device operations simple.

Inventive Principle:
Principle #6Universality (Multi-functionality)

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 precise management of compaction state by identifying and storing the maximum compaction pressing force at each location, allowing for improved compaction quality and consistency.

Implementation Method 1

a machine body posture detector that detects a machine body posture which is a posture of the machine body

Methodology Applied
Scientific EffectGravitation: Gravitation

Implementation Method 2

a work device posture detector that detects a work device posture that is a posture of the work device

Methodology Applied
Scientific EffectGravitation: Gravitation

Implementation Method 3

a working pressure detector that detects a working pressure of the work actuator

Methodology Applied
Scientific EffectPressure sensing:

Data Source

PatentEP4130401B1Compaction management system
Publication Date: 2025.08.06 KOBELCO CONSTR MASCH CO LTD
  • EP4130401B1 patent drawingFigure 1
  • EP4130401B1 patent drawingFigure 2
  • EP4130401B1 patent drawingFigure 3

AI summary

Provided is a compaction management system capable of accurately managing the compaction state of a compaction target ground. The compaction management system includes a compaction-pressing-record production unit, a storage device, and a final-compaction-pressing-record selection unit. The compaction pressing record production unit produces a plurality of compaction pressing records, each of which includes the pressing compaction position and the compaction pressing force which are associated with each other. The storage device stores the plurality of compaction pressing records. The final-compaction-pressing-record selection unit selects a selection target compaction pressing force record including the largest compaction pressing force among a plurality of selection target compaction pressing records, which are included in the plurality of compaction pressing records stored in the storage device and produced with respect to the same compaction pressing position, as the final compaction pressing force record with respect to the compaction pressing position.