Equipment World Digital Magazine
Issue link: http://read.dmtmag.com/i/489028
high accuracy as system components are moved from one machine to another. The ruggedized tablet computer can show a split screen with two sets of data simultaneously. Stiffness and pass count are available with all rollers; asphalt rollers add mat temperature. HCQ allows communica- tion between up to three rollers at once so operators can see others' data in real time. Location information requires a subscription to Omni- STAR. The service provides accuracy to within 10 cen- timeters, or about 4 inches. "We chose OmniSTAR be- cause of its simplicity," says Tim Kowalski, applications support manager for Hamm. "With differential GPS you get RTK-level accuracy without the use of base stations. OmniSTAR is available anywhere, anytime the machine is running, requires no set-up, and maintains its accura- cy and signal strength as the equipment moves around the worksite." The satellite signal is retained for up to 16 hours after shut-down to minimize signal acquisition time after breaks, at shift changes, at each day's start, or whenever there's a gap in operations. Talk to me It's not enough to gather data. The data must also be shared. BCM 05, the current version of BOMAG Com- paction Management, is one example of what's avail- able. The BCM 05 system has a touchscreen tablet PC, a lockable holder for the tablet, a USB memory stick and the BCM 05 software. BCM 05 reports conditions to the roller operator us- ing a color-coded display and numbers. Comparisons to previous passes and to target values are indicated. Problem areas — such as those that cannot be com- pacted or are at risk of being over-compacted — are shown. Date and time are documented. All information can be transferred to a desktop or laptop PC using the memory stick for project management, statistical analy- ses, archiving, printing, and program calibration. With the addition of BCM 05 positioning software and a GPS receiver, location information can be added to the data. BCM 05 positioning can interface with a conventional differential GPS (DGPS) system and works with or without a reference station. BOMAG says the system is compatible with any currently avail- able DGPS system. With a satellite-assisted reference April 2015 | EquipmentWorld.com 40 machine matters | continued BOMAG BOMAG's VARIOCONTROL system adjusts drum vibration forces from vertical to horizontal or at any angle in between to match conditions. VARIOCONTROL is available on single-drum compactors from 7.3 to 32 metric tons. Case The Case DV209C and DV210C have dual frequency ranges with variable amplitude settings to give operators improved control over compaction performance based on the thickness and density requirements of the lift. IC is available on both models. Caterpillar Caterpillar offers two types of IC. Their traditional accelerometer-based is called Compaction Meter Value. The Machine Drive Power (MDP) system, a Cat exclusive, uses roll- ing resistance to compute stiffness and can be used in both vibratory and static modes. Veda OEMs use proprietary data to quantify compaction perfor- mance. Veda software allows data from different machines to be standardized for geospatial data management, viewing, analysis, and reporting. Veda was developed by the Minnesota Department of Transportation and the Federal Highway Administration and is free.