Pass-by-Noise Measurements Utilising GPS

Unique to our SmartOffice based vehicle Pass-by-Noise measurement system are the GPS components for both velocity and speed information. This is what allows us to reduce our system down to two PC based measurement units without the need for radar, light beams, track position sensors and of course all the set-up time involved with all those components. However, our own personal SatNav experience and technical intuition regarding how GPS works often prompts the question "GPS can't be that accurate ... can it?" - well it's not obvious but m+p engineers have developed a system that really does provide accuracy and repeatability that is measured in a few millimetres and hence have created a world-beating solution for this application.

The vehicle noise, engine RPM and other measurements are performed by two SmartOffice based portable analysers. One is based at a fixed point on the vehicle test track and the other inside the vehicle being tested. The driver can operate both systems automatically from his in-vehicle PC to control his measurement runs and do on-line analysis. Final reports are also created from the powerful SmartOffice report generator.