accelerometers

[saradhi]

hi,
I am new to DAQ and in particular to accelerometers.
Any help with regards to how to chose particular models for a 0- 300g, 10-100mV/g sensitivity, 0(atleast 3hz or below )-10Khz, application involving vibrabtion testing of tendons would be greatly appreciated. some possible vendors include endevco (#7703-50) , PCB (#352c18 ,#353b03). Any information with regard to experiences with such vendors would be of great help.

please email to asaradhi@hotmail.com

thanks
ananth

[Math]

If your are searching for accelerometers, search for the ADXL210 on the Analog Devices site... They are 2 axis, good performance, low cost and very small +-10G acc. They have a duty cycle modulated output (DCM), but you can also use their analog (filtered) output. Maybee you can find a 0 - 300G device their also!

[PdB]

Ananth,

Beside the famous AD, you can also try out a newer kid on the block, a company called MEMSIC.
As I believe it, instead of mechanical moving silicon parts (using changing impedances), their devices use temperature-sensing techniques to detect the movement of a trapped gas. It has no moving parts, so this looks very robust to me.
Due to the temperature-principle, the bandwith is somewhat limited to 40 Hz.
On their website you can even ask for a sample, which is always handy for evaluation purposes.

Note: I have no commercial link with the company but was pleased by their friendly sampling-policy, rare these days if you are a small company.

Patrick de Boevere

[Filipe A.]

Hello;

Once you have the accelerometers ready, you can take a look at NI SCXI-1530 conditioning module for accelerometers at www.ni.com/support.

Regarding accelerometers vendors, NI doesn't refer to any brand in particular, meaning that you can hook up any accelerometer to our signal conditioning modules.

Hope this helps.
Filipe A.
Applications Engineer
National Instruments