Subnavigation

Content

HCQ - Indicator

Continuous Compaction Control

Area compaction control provides an economical alternative. Since the most important parameters for ground quality – degree of compaction and load-bearing capacity – can only be influenced during the compactor operating phase, the ideal method of control is to take measurements directly during compacting. The necessary measuring technology for this purpose has been a standard feature of HAMM earthmoving compactors for many years. With this on-line measuring system, the driver can see while working where the desired load-bearing capacity has already been attained and where additional passes are required. This increases the quality of the working result.

The HCQ-GPS Navigator combines this compaction measurement with the GPS position data from the drum and shows the driver a “compaction map” of the work area in real time. The compaction data and position data is recorded by an on-board PC. The system also provides comprehensive possibilities for the continuous and reproducible documentation and analysis of compaction results.

The HCQ-GPS Navigator uses a DGPS receiver (Differential GPS). This permits accurate positioning to within a few decimetres. The only preparation required is to install the DGPS receiver in the compactor. Time-intensive and costly setup of a ground station on the construction site is not necessary.

24 GPS satellites (GPS = Global Positioning System) orbit the earth constantly on 6 different orbits. To locate a position clearly, the receiver must have a visual connection to at least four satellites. The DGPS receiver uses the differential signal (correction signal) from an additional satellite. With this additional information the DGPS receiver pinpoints the position of the roller with very high precision.

Simple to operate: The roller driver simply has to switch on the PC. The program starts up automatically. The HCQ software has two user interfaces.

The user-friendly system

Driver

  • The system is ready to start without complex preliminaries: simply place the DGPS receiver on its mounting and switch on the PC in the cab and away you go.
  • The driver can display the working result on the cab monitor in the form of the number of passes or the attained load capacity.
  • In addition to the load capacity values determined in real time, fixed points or geolines can be displayed. This helps the driver to find his way around the construction site.
  • The driver operates the system via a touch-screen monitor with larger user fields and a clearly arranged graphical display.
  • The driver can view the “Compaction Map” in the desired resolution thanks to the Zoom function.
  • To calibrate the system, only a small number of reference measurements have to be taken at selected points.
  • The operating system of the HCQ-GPS Navigator is designed to be easy to use even by drivers with no experience of working with a PC.
  • Data is transferred simply by means of USB stick.

Analyst

  • The analyst is supplied with all construction site data, such as the number of passes, load capacity and change in load capacity.
  • For the purpose of compaction measurement analysis, the statistical distribution of the load capacity is also available. The measured values are displayed optionally in the form of the HMV value, the load capacity Ev2 or as any other variable.
  • If the drawings are available in digital form, they can be loaded into the system.
  • Operation of the HCQ-GPS Navigator software in Analyst mode is logical and uses common symbols and terminology.
  • The measured results can be exported from the HCQ-GPS Navigator software and processed with standard software.
  • The archiving of project data and measurement data is simple and space-saving.