Patent · US Active

Method for determining the compaction state of substrate

US10435852B2 · kind B2 · utility

2Cited by

3References

9Claims

0Family size

Assignee

Hamm AG · DE

Inventors

Johannes Pistrol · Spittal an der Drau, AT
Fritz Kopf · Wien, AT
Werner Völkel · Neustadt, DE
Sebastian Villwock · Pechbrunn, DE

Key dates

Filing date	Dec 1, 2016
Grant date	Oct 8, 2019
Priority date	—
Expiry date	Jul 15, 2037

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE01C19/286
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for determining the compaction state of a subgrade to be compacted using a roller compactor comprising at least one compactor drum having an oscillation-inducing arrangement and rotatable about a drum axis of rotation comprising the following steps: during at least one period of oscillating movement of the compactor drum, repeatedly determining the acceleration of the compactor drum in an first direction, representing a first acceleration value; in association with each first acceleration value, determining an acceleration of the compactor drum in a second direction representing a second acceleration value in order to provide acceleration value pairs, each consisting of a first acceleration value and a second associated acceleration value; and for at least one oscillation period, defining a compaction state value representing the compaction state of the subgrade based upon the period of oscillation determined for said acceleration value pairs.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.