Compactor Frame Radar Mounting for Impact-Protected Density Sensing

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Solution Overview

Problem

Existing soil compactors with ground-penetrating radar density measurement devices are prone to damage from external impacts and cleaning processes, compromising their functionality and accuracy.

Innovation Solution

Integrating ground-penetrating radar density measurement devices within the internal volume areas of the compactor frame, protected by hollow beams and elastic suspension elements, to shield them from external impacts and facilitate maintenance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the ground-penetrating radar density measurement device is mounted on the compactor frame, then the device can perform soil density measurement, but the device is vulnerable to external physical impacts and damage during operation and cleaning

Engineering Contradiction:
Improvedevice protectionVSAvoidexternal physical impacts
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The ground-penetrating radar density measurement device is nested within the internal volume of the compactor frame, specifically positioned within the hollow crossbeam structure. This nesting approach protects the measurement device from external physical impacts while allowing it to function effectively for soil density measurement during compactor operation.

Inventive Principle:
Principle #7Nested doll (Nesting)

Solution Approach 2:

The compactor frame's hollow crossbeam structure acts as a protective shell enclosing the radar measurement device. This shell provides mechanical protection against impacts during operation and cleaning processes, while the hollow design allows integration of the measurement system without adding significant weight.

Inventive Principle:
Principle #30Flexible shells and thin films

2Reliability

If the ground-penetrating radar density measurement device is integrated within the compactor frame's internal volume, then the device is protected from external impacts, but the device complexity and structural design become more complex

Engineering Contradiction:
Improvedevice protectionVSAvoidframe structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The hollow crossbeam structure of the compactor frame serves multiple functions: it provides structural support for the compactor, acts as a protective enclosure for the radar measurement device, and enables integration of the measurement system without requiring separate protective housings. This multi-functionality reduces overall system complexity despite the integrated design.

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

3Reliability

If the ground-penetrating radar density measurement device is positioned within the internal volume of the compactor frame, then the device is protected during cleaning operations, but access for maintenance and repair becomes more difficult

Engineering Contradiction:
Improvedevice protection during cleaningVSAvoidmaintenance accessibility
Core Design Contradiction:
ReliabilityVSEase of repair

Solution Approach 1:

The compactor frame structure is segmented to include access points or openings in the hollow crossbeam sections where the radar measurement device is integrated. This segmentation allows maintenance personnel to access the measurement device for repair and maintenance while the device remains protected within the frame's internal volume during operation and cleaning.

Inventive Principle:
Principle #1Segmentation

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

Protects the radar devices from damage while ensuring accurate and reliable soil compaction state detection, enhancing the durability and operational efficiency of the compactor.

Implementation Method 1

at least one ground-penetrating radar density measurement device (34) arranged in an internal volume area (N VI) of the compactor frame

Methodology Applied
Scientific EffectGround-penetrating radar: Radar

Implementation Method 2

at least one elastic suspension element (48) arranged between the sensor carrier (42) and the compactor frame

Methodology Applied
Scientific EffectVibration damping: Damping

Data Source

PatentEP4660374B1Floor compressor
Publication Date: 2026.05.13 HAMM AG
  • EP4660374B1 patent drawingFigure 1~2
  • EP4660374B1 patent drawingFigure 3~4
  • EP4660374B1 patent drawingFigure 5

AI summary

A soil compactor comprises at least one compactor roller (18, 20) rotatably mounted on a compactor frame (12) and at least one ground radar density measuring arrangement (34) arranged in an internal volume area (VI) of the compactor frame (12).