datasheets.com EBN.com EDN.com EETimes.com Embedded.com PlanetAnalog.com TechOnline.com   UBM Tech
UBM Tech
Home    Bloggers    Blogs    Article Archives    Messages    About Us   
Tw  |  Fb  |  In  |  Rss
Aubrey Kagan

Temperature Measurement, Part 5

Aubrey Kagan
Page 1 / 4   >   >>
goafrit2
goafrit2
5/8/2014 7:39:06 PM
User Rank
Master
Re: Nice set of articles
>> @redDerek: "I have a USB plug-in temp sensor."

Many has asked the same question. How can this work? What is the use? And how can one get a piece of this tool. Just thinking about it is cool but if the USB gives you the temp, you still need a feedback to actually make things happen, i.e. control the temp.

50%
50%
goafrit2
goafrit2
5/8/2014 7:32:41 PM
User Rank
Master
Re: thermometers
This seems like a global movement. Unfortunately the right people are not listening. Even the new startups like Nest all depend on mercury thermometers for their wonders.  Nothing will happen until the U.S. govt buys out the makers as they did to those making tungsten bulbs for migration to LED bulbs. You need to buy them out and then they will move to newer safer thing.

50%
50%
goafrit2
goafrit2
5/8/2014 7:28:30 PM
User Rank
Master
Re: thermometers
>> The liquid alloy "galistan" has most of its features matching the mercury but has its own set of problems

Just getting to know this galistan for the first time. Googling it does not make it seem like a really good alternative to mercury.

50%
50%
goafrit2
goafrit2
5/8/2014 7:25:06 PM
User Rank
Master
Re: thermometers
>> The best idea is to make a circuit work with 6-sigma complaince across different PV and T so that we are 99.9% assured that the we have a good temperature monitoring device.

 

That is certainly the best strategy. Solve the problem at the level of circuit. Make the strategy to be driven by circuit and do not depend on these extra corrections and calibrations. If designers invest time on simulations and models, we can design-out some of the issues that require expensive calibrations etc.

50%
50%
goafrit2
goafrit2
5/8/2014 7:19:14 PM
User Rank
Master
Re: Re : Temperature Measurement, Part 5
>> Hence, similar to self-healing, self-calibration would be processed while monitoring temperature sensor.

 

Good point but doing that for very cheap consumer electronics systems will not help any company stay competitive. Self-calibration is not free and viable for fairly high quality products. But when it means commoditized products, that becomes a burden.

50%
50%
RedDerek
RedDerek
5/6/2014 10:38:28 PM
User Rank
Master
Re: Nice set of articles
If I recall, it was either a Maxim or National Semi demo board from about 8 years ago. Not sure which box thte bard is in right now.

50%
50%
amrutah
amrutah
5/6/2014 11:32:05 AM
User Rank
Master
Re: Nice set of articles

@redDerek: "I have a USB plug-in temp sensor."

   This is interesting and thanks for sharing.  What kind of application is this for? and after interfacing this USB temp-sense to your PC, what do you do? 

I am unable to gauge its usage.

50%
50%
amrutah
amrutah
5/6/2014 11:26:55 AM
User Rank
Master
Re: Thermometers
@yalanand: "also would like to say that gas thermometers should be used more"

   I agree that we need to eliminate the usage of mercury based thermometers, but the gas based thermometers are complex, may not be good for small temperature ranges like -20 to 85 degC, portability etc.

50%
50%
amrutah
amrutah
5/6/2014 11:12:48 AM
User Rank
Master
Re: thermometers
@fasmicro:  You may want to check the following links about the ban

Phase out

Countries and their opinions

   There are many alternatives being planned out, its upon us to open our eyes and embrace one.  Many governments are actively taking part in eliminating the mercury based thermometers.

Few alternatives to mercury based thermometers.

50%
50%
amrutah
amrutah
5/6/2014 11:03:07 AM
User Rank
Master
Re: thermometers
@Victor: The liquid alloy "galistan" has most of its features matching the mercury but has its own set of problems, but as you said it can eventually replace mercury from thermometers.

Thanks.

50%
50%
Page 1 / 4   >   >>
More Blogs from Aubrey Kagan
Experience should have taught Aubrey Kagan to consider power dissipation before introducing a component into a design. Unfortunately, it always seems to come back to bite him.
I now hope to cover the comparative advantages and disadvantages of both mechanical and electronic potentiometers.
As I understand it, there are two different reasons for using an adjustable resistor.
One of my first projects was to design a control for a coffee packaging machine. It was in the late 70s and microprocessors were on everybody's lips, but few actually knew anything about them.
Aubrey Kagan has completed the series on Excel that he set out to write nearly two years ago.
flash poll
educational resources
 
follow Planet Analog on Twitter
Planet Analog Twitter Feed
like us on facebook
our partners
Planet Analog
About Us     Contact Us     Help     Register     Twitter     Facebook     RSS