Tally Clerk is a New Zealand-based TagMaster distributor who manufactures Load Volume Scanners (LVS), a non-contact device for measurement of bulk aggregates in open-tray truck and trailer units. Bulk materials such as rock and sand are paid for using volume measures. Load volumes can be computed from mass / volume ratios, but this method is often inaccurate because of moisture content, compaction and other factors. The LVS uses lasers to measure load volume without the need for weightto- volume conversions. Tally Clark has integrated the TagMaster RFID system for automatic vehicle identification to fully automate the measurement system.
TagMaster's longrange readers are installed, facing downwards, on the bottom panel of the scan head at 5.2m from the ground. TagMaster ID tags are mounted on top of the sunvisor above the windscreen of the truck cab facing upwards. The vehicles pass below the scanner and reader at slow speed. The TagMaster reader, which is a standard option for Tally Clark LVS units, is connected to the system computer. Tally Clark has developed its own software drivers for the reader using the TagMaster protocol. The ID tag data is used to identify vehicles in the system database and retrieve information for load calculation. By integrating TagMaster RFID technology it has been possible to make the LVS a fully automated device.
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