4DVib leverages interferometric radar to remotely capture structural movements at very high acquisition rates, delivering reliable data to support informed decision‑making, including:
The 4DVib unit is set up facing the structure to be inspected.
The 4DVib unit measures the distance between itself and the inspected structure at very high frequency.
Multiple points of the structure are monitored simultaneously and differentiated automatically based on their distance to the 4DVib unit. Measurements are therefore made without the need to access the structure, and can be made with or without dynamic stress.
Under optimum conditions, measurements are accurate to between 2 and 3 microns. High-frequency movement measurements make it easy to calculate displacement velocities (vibration in the same way as a geophone), and the natural frequency modes of the structure.
How interferometric radar works:
The radar unit emits frequency-modulated electromagnetic waves that enable target points to be differentiated on the basis of their distance from the device (1 point every 75 cm).
Differential interferometric analysis of the return signals calculates distance variations with a field accuracy of around 0.02 mm.
Multiple points on the structure can be measured remotely with no need for access to the structure.
developed from 20 years of experience and in-house development: the world’s leading specialist in the provision of accurate and immediately usable measurements
our teams understand your needs and understand how to provide you with the data you want
as a result of our extensive network
with the option to combine several different sensor types
