Compactor Roller Measurement Artifact Correction
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Solution Overview
Problem
Soil compactors experience measurement artifacts due to static or dynamic imbalances in their rollers, which affect the accuracy of assessing subsoil compaction by superimposing periodic motions on the rotary motion, making it difficult to obtain precise information about the degree of compaction.
Innovation Solution
A method to correct measured value curves by dividing them into periods, determining a mean curve, forming difference curves, and normalizing lengths to eliminate periodic artifacts, resulting in a corrected curve suitable for assessing subsoil compaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If unbalanced masses are added to compactor rollers to generate vibrational motions for subsoil compaction, then compaction effectiveness is improved, but measurement precision deteriorates due to periodic measurement artifacts
Solution Approach 1:
The measured value curve is segmented into multiple individual period curves, each representing one rotational period of the compactor roller. This segmentation allows the periodic measurement artifacts to be isolated and analyzed separately, enabling their removal through averaging while preserving the underlying compaction information.
Solution Approach 2:
Multiple individual period curves are merged by calculating their arithmetic mean to produce a mean period curve. This merging process eliminates periodic measurement artifacts that appear with opposite signs in different periods, while maintaining the consistent compaction signal, thereby improving measurement precision without sacrificing compaction effectiveness.
2Adaptability or versatility
If compactor rollers operate at varying speeds over subsoil, then adaptability to different working conditions is improved, but measurement precision deteriorates due to varying period lengths
Solution Approach 1:
The measurement system dynamically adapts to varying operational conditions by detecting the actual rotational period of the compactor roller during operation. The evaluation device adjusts the period length based on real-time speed variations, allowing accurate measurement and artifact removal even when the roller operates at different speeds, thus maintaining measurement precision across diverse working conditions.
Data Source
AI summary
A method is provided for the correction of a measured value curve by eliminating periodically occurring measurement artifacts. The method includes steps ofprovision of a measured value curve representing a periodically repeating event,division of the measured value curve into period-measured value curves allocated to a plurality of successive periods of the periodically repeating event,based on the period-measured value curves allocated to the plurality of periods, determination of a mean period-measured value curve,formation of a difference between the period-measured value curves allocated to the plurality of periods, and the mean period-measured value curve for the provision of the difference-period-measured value curves allocated in each case to the periods, andbased on the difference-period-measured value curves, determination of a corrected measured value curve for the plurality of successive periods of the periodically repeating event.