TMP007 / How far away can I read an object temperature?

Toshiyuki

Other Parts Discussed in Thread: TMP006

Hi,

We are considering TMP007. If FOV is altered by using additional optical lenses or by limiting the FOV through the use of an
aperture, could the distance of the target object be extended with high accuracy ?

Best Regards,

Kato

over 10 years ago

0 Tommy Santoyo over 10 years ago

TI__Intellectual 1811 points

Kato,

Thank you for considering our TMP007.

Restricing the field of view by means of an aperture will decrease your signal. It will give you more of the signal that you are really interested in which is good, but if the signal is low to begin with due to distance, that may be an issue. Having said that we have offered our experience with FOV restricting shields in which we have had very good results. Can you give me an Idea of the distance you are concidering and what kind of optical aids you are concidering.

Regards,

Tommy Santoyo

Sensing Apps Team

0 Ruth Recktenwald over 9 years ago in reply to Tommy Santoyo

Prodigy 10 points

I am also looking into longer distances, closest would be 8ft, but the longest would be about 25ft. Any tips? I'm open to using a lens or a shield if I can find one that is reasonably inexpensive.

0 Michael Wong over 9 years ago in reply to Ruth Recktenwald

TI__Expert 7220 points

Hi Ruth,

Our expert on the TMP007 will be back in the office next week. Thank you for your patience.

-Michael Wong

0 Ren Schackmann over 9 years ago in reply to Ruth Recktenwald

TI__Mastermind 43715 points

Hi Ruth,

Unfortunately we have not seen TMP006/7 successfully used at those distances. The smallest Field-Of-View (FOV) that we have tested is about 22° which would give a visible spot 3 feet in diameter at a distance of 8 feet. It's not clear to us whether the signal is simply too weak due to distance or if the measured object makes up too little of the visible area. If you wanted to try, I would suggest building an enclosure similar to what IR Guns commonly use. This would consist of a baffled tube to set the FOV and a IR transmissive fresnel lens.

Ren

0 Ren Schackmann over 9 years ago in reply to Ren Schackmann

TI__Mastermind 43715 points

Also, I would only attempt to do this with the "Thru-Hole" approach shown on page 27 of the TMP007 Layout and Assembly Guide. The sensor receives 2-3x signal with this design. We have an EVM showcasing this approach and additional documentation on the way.

Ren

0 Mason Noh over 8 years ago in reply to Ren Schackmann

Expert 2490 points

How far away can I read an object temperature(Maximum distance)?
IR Radiation from object without window.

0 Ren Schackmann over 8 years ago in reply to Mason Noh

TI__Mastermind 43715 points

Please see the E2E IR FAQ.

e2e.ti.com/.../548824

Ren

Sensors

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TMP007 / How far away can I read an object temperature?