All Videodata systems’ accelerometers are specifically designed for Civil Engineer applications; nevertheless our accelerometers can find many others useful applications, when very high sensitivity and low noise are useful.
We call our proprietary technology “Cross correlation Multi-Mems Accelerometers” that basically means we use many high quality mems sensors to collect synchronized signals from the same process. After that, cross correlation technic is applied to the signals and it helps to extract the useful signal from the noise, that is statistically almost completely uncorrelated.

We up to now can offer two class of accelerometers, specialized for different applications :

  • Seismic Risk Assessment Accelerometers

  • S.H.M Accelerometers

Seismic Risk Assessment Accelerometers

They are designed for very high sensitivity, that is 10 V/g and up.
We have now in production one axis, horizontal plane only, five models all with a bandwidth 0 – 20 Hz .

– 10 V/g
– 13 V/g
– 16 V/g
– 18 V/g
– 22 V/g

The resolutions span from 8 to better than 5 micro g.
A Multi-Mems Cross correlation accelerometer for Seismic Risk Assessment, with very high sensitivity of 32 V/g, under tests.
Vertical axis accelerometers are under development.
We have also under development, for these analog accelerometers, a wireless system, that we call DATS :

Data Acquisition & Transmission System, offering four differential inputs, very low noise, 24 bits Analog to Digital conversion, a microprocessor based board with local storage on an extractable micro SD, and data Tx / Rx via internet and cloud web server.

S.H.M accelerometers

We have under development a class of 3- axis digital accelerometers, using the same cross correlation technic, offering in a same small robust enclosure, the accelerometer and a dedicated DATS. They too will offer High sensitivity and low noise.

Finally we want to remark all our accelerometers exhibit an extraordinary robustness : they can stand shocks up to 20.000 g , powered or not.

Multi-Mems Cross correlation  accelerometer for  Seismic Risk Assessment (SRA)

Laser Diagnostic & Rescue (LDR)

Our laser based system is up to now unique in that it can give directly precise measurements of displacement of a structure, while accelerometers can only give accelerations on time, and, after a FFT post processing, the modal frequencies of structures.

Using a baseline structural resting position, or, better to say, several reference points and many systems opportunely installed on the bridge under examination, it is possible to acquire measurements that can give structural engineers a precise understanding of the instant deformation: that is impossible using accelerometers only.

The LDR is comprised of two main components: the Laser Pointer (LP) and the Active Target (AT) device. The LP, installed on a reference point, produces a laser beam which projects a spot onto a special screen in the AT device.

The AT device is equipped with a digital video camera, that works with a microprocessor board, and proprietary firmware, in order to calculate the movements of the spot.

This board connects directly to the internet with a M2M Sim or an external available wi-fi, thereby enabling it to transmit data and to receive commands from a remote computer.

Laser Pointer installed on a concrete wall

Double Lasers Pointer used in laboratory for precise measurements

An Active Target device installed on a concrete wall, powered by a photovoltaic panel