Vibration sensors help

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kadamb
Posts: 2
Joined: Fri Mar 03, 2017 7:19 pm

Vibration sensors help

Post by kadamb » Fri Mar 03, 2017 7:27 pm

Hello All

I am Kadamb from Singapore, I am a biologist and have a keen interest in developing a novel application of sensors. I need help from experts here. I am looking for sensor chip or components which can detect lowest possible vibration. For example earthquake sensors. The idea is to integrate vibration sensor chip. I have no idea which chip will be best for such applications.
Thanks a lot

jremington
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Posts: 2103
Joined: Fri Jun 15, 2007 9:41 pm
Location: Eugene, Or

Re: Vibration sensors help

Post by jremington » Sat Mar 04, 2017 6:15 pm

Describe the vibrations that you expect to encounter -- frequency and amplitude.

Earthquake sensors (seismometers) are extremely sensitive instruments, usually with coils and moving magnets as shown here: https://tc1seismometer.wordpress.com/

There are no chips that are useful for long range earthquake detection, but inexpensive chip accelerometers might work for your application.

brianuno
Posts: 37
Joined: Tue Jan 24, 2017 2:52 pm

Re: Vibration sensors help

Post by brianuno » Tue Mar 07, 2017 4:53 pm

Why don't you start with an accelerometer? They are inexpensive. I picked one up at an electronic hobby store for about $12.00 plus sales tax. The unit is more complex than most sensors. It has 8 pins. Mine is the 3-axis type. I only want to detect motion, not direction of motion, therefore, the circuit I have in mind may be not require all pins. The sensitivity is supposed to be 2-3 g, sensitive enough to detect an earthquake. I have experienced many earthquakes.

kadamb
Posts: 2
Joined: Fri Mar 03, 2017 7:19 pm

Re: Vibration sensors help

Post by kadamb » Thu Mar 09, 2017 12:27 am

Thanks a lot for your suggestions

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