A certified VMS 520 volume measurement system
The Federal Institute of Physics and Technology (PTB) in Braunschweig has certified the VMS 520 volume measurement system on the basis of the test parameters of the OIML R129 standard.
A complete system capable of calibration can now be developed for courier, express and package logistics – and approved by national testing authorities – by combining a calibrated weighing system with bar-code scanners.
Significant technical features led to the certification of the VMS 520 with test certificate number D 04 / 1.6.01.
Thus, for example, both the scale value and the calibration error limit are 5 mm – each based on a maximum conveyor speed of 2 m/s.
The smallest distance to be measured is 50 mm – which means that even objects with an edge length of just 50 mm can be measured with calibrated accuracy.
Robust measurement gantry The VMS 520 volume measurement system consists of two sensor heads with mounting brackets and the software for parameterisation, diagnosis and visualisation of the volume measurement system.
The sensor heads are mounted on a vibration-proof gantry frame above a conveyor system moving at a rate of 2 m/s. They each emit a fan-shaped laser beam with an angular resolution of 0.125°.
The time-of-flight of the laser beam is accurately evaluated in each sensor head to within a few millimetres. The sensor heads combine their measurement values (no supplementary evaluation unit is necessary) and thus determine the length, height and width of boxes or packages.
The real-time transmission of the measurement data to the control system of the entire system can be carried out via the serial RS-232 interface or an Ethernet connection.
As the VMS 520 is characterised by compact dimensions, the integration of numerous functions, and simple installation and commissioning it can optionally be integrated with other identification modules in a complete solution capable of calibration.
Improved and transparent distribution processes Certified volume measurement systems are increasingly being used by courier, express and packet services (CEP) in distribution centres.
They not only permit improvement of sorting, preparation and distribution processes but, as a result of their great accuracy, also offer transport service providers the opportunity to precisely measure and classify boxes, packages and other transported goods.
Thus CEP companies are now in a position to calculate the actual transport services provided (instead of relying on estimates provided in advance by the consignors) and can, if necessary, submit follow-up invoices.
Depending on the actual amounts involved, this can quickly lead to amortisation of the entire system.