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.
