Using the FD2214 with arduino to measure movement

Tony Philip

Other Parts Discussed in Thread: FDC2214

Hi,

We wanted to use the capacitive senor for non contact movement analysis, The apparatus we have in mind is set up in such a way that the body moves only perpendicular to the sensor plate .We would love if you could help us oout with the follwing questions:-

Can I use the sensor to measure disatance of the body as show in the TI vedio demostrations using an arduino to read I2C(distance < 3cm)?

Can I get a sample data rate of at least 2K values per sec with FDC2214 +Arduino System?

What are the typical materials that the moving body be made of for maximum sensitivy such that the sensor plate can pick up changes in capacitance easily?Can I increase sensitivity by Grounding the material(Conductor)?

Will the device detect changes if I put the object around 3cm from the sensor plate and a change in +/- 1 cm?also, wats the max. distance that the sensor plate can pick up the changes in capacitance?

Note that the moving body only moves perpendicular to the sensor plate.

over 9 years ago

0 Yibo Yu over 9 years ago

TI__Expert 8050 points

Hello,

Thank you for contacting TI. We will get back to you during our group's normal business hours (Mon-Fri, PST).

Regards,
Yibo

0 Tony Philip over 9 years ago in reply to Yibo Yu

Intellectual 260 points

Surely! :)

0 Yibo Yu over 9 years ago in reply to Tony Philip

TI__Expert 8050 points

Hi Tony,

Yes, you can use Arduino to communicate to FDC2214 via I2C. FDC2214 supports up to 4k Sps.

Ideally target materials should be good conductors, such as copper or aluminum. Less conductive materials can also work, but sensitivity would be less. As you ground the target, please make sure you have a solid system ground. Also please minimize parasitic capacitance and resistance when you design your system.

The actual sensitivity and detection range would highly depend on sensor design and system configuration. This application note has an example of detecting a human hand with a copper plate sensor for your reference.
www.ti.com/.../snoa940

Regards,
Yibo

Sensors

Sensors forum

Using the FD2214 with arduino to measure movement