Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Need help to choose accelerometer

vishweshgm

Member level 3
Joined
Dec 17, 2021
Messages
60
Helped
2
Reputation
4
Reaction score
3
Trophy points
8
Activity points
731
Hello,
I want to choose an accelerometer for measuring vibration experienced by a person on moving vehicle. The frequency of vibration is somewhere between 1 and 20Hz.
Accelerometers are of different types. Piezoelectric, piezoresistive and capacitive. Also its categorized as analog and digital. So please help me choose which type of acceleromter would be most suitable for my application to get highest accuracy and highest sensitivity.
 

KlausST

Super Moderator
Staff member
Joined
Apr 17, 2014
Messages
22,244
Helped
4,613
Reputation
9,242
Reaction score
4,878
Trophy points
1,393
Activity points
146,953
Hi,

we just know the frequency range of your application.
For the given frequency range almost every accelerometer can be used.

We don´t know if you want analog or digital. .. or what resolution and range.... and so on.

It´s your job to specify what you need.

Klaus
 

vishweshgm

Member level 3
Joined
Dec 17, 2021
Messages
60
Helped
2
Reputation
4
Reaction score
3
Trophy points
8
Activity points
731
analog or digital. .. or what resolution and range.... and so on.
Hi, either analog or digital is OK. I am looking for minimum 0.01g measurement possible and range can be upto 2g. I could find many accelerometers meeting these specification.

But I am looking for answer that say what type of accelerometer best suited. I mean accelerometer technology using Piezo and capacitive both provide above spec meters. Which is best suited for my application?

Someone who has worked on similar measurement might know how to choose or guide me which aspects of my application should I look into.
 

KlausST

Super Moderator
Staff member
Joined
Apr 17, 2014
Messages
22,244
Helped
4,613
Reputation
9,242
Reaction score
4,878
Trophy points
1,393
Activity points
146,953
Hi,

again: Without a definintion what "best suited" means for you ... we can´t give you an answer to your question.
Most important are electrical and acceleration specifications.
But also price, interface, power supply, color, size, availability, volume, material, wheight, SMD/THM/with cabele, sealed or not...and a lot more.

we don´t know whether you have an analog contol unit or a digital one, if you use a microcontoller.. with or without ADC, what interfaces, how many sensors maybe you want to connect to a bus...

My recommendation:
Go to a big acclelerometer manufacturer and use the selection guide.
Also they may provide documents on "how to choose an accelerometer"

Klaus
 

dick_freebird

Advanced Member level 5
Joined
Mar 4, 2008
Messages
7,835
Helped
2,228
Reputation
4,464
Reaction score
2,176
Trophy points
1,393
Location
USA
Activity points
62,809
Might start from the back, expect you will be recording and that means a digital host, how that wants output data will narrow the field quickly. Then #axes and then range / resolution. Beware of over specifying....
 

andre_luis

Super Moderator
Staff member
Joined
Nov 7, 2006
Messages
9,391
Helped
1,174
Reputation
2,367
Reaction score
1,166
Trophy points
1,403
Location
Brazil
Activity points
54,640
There are accelerometers, at least the one I've used, with programmable low pass internal filter in order to provide sensitivity adjustment, beyond the mere threshold itself. Furthermore, it is possible to set the sensor's output pin to generate a pulse in case a certain acceleration has been reached. In short, there are numerous options of your choice, you are the one who can better assess it.
 

LaTeX Commands Quick-Menu:

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top