Timeline for Slow rise time for a temperature sensor
Current License: CC BY-SA 4.0
13 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 15, 2024 at 0:48 | comment | added | periblepsis | @basj Looking at my shelf, there is one other book I acquired at that time: "Inorganic Phosphors: Compositions, Preparation, and Optical Properties" by Yen and Weber. Actually, that book was perhaps the more important one. So I had to add this comment to the above, since excluding it would be a crime. Also, one fun detail is that phosphor sensors (a small dot of phosphor used at the tip of a very thin fiber -- read here for example) work excellently inside a microwave oven chamber (or human brain or artery) and are also extremely fast. | |
| Dec 15, 2024 at 0:37 | comment | added | periblepsis | @Basj I don't see how to frame it as an answer to your question. But it was a fascinating process -- an unsolved problem posed by a client. I worked with Dr. Wickersheim on this project (before he died.) The specific phosphor and ceramics involved are, of course, key. Books include "Measurement of Phosphor Properties" by Yen and Shionoya and Yamamoto, the "Phosphor Handbook" also by those authors, "Phosphors: Synthesis and Applications" by Dhoble, et al, and "Phosphor Thermometry on Surfaces: A Study of its Methodology and its Practical Applications" by Knappe. It was a fun time. | |
| Dec 14, 2024 at 15:23 | comment | added | Russell McMahon♦ | Look at bare PT 100 sensors. Relatively cheap relatively accurate and completely dumb. Just give you resistance variation with temperature which you have to process ut if you look at their typical characteristics gives you an idea of what can be achieved. You can buy cheap LCD displays which use these on the end of a referral lead and almost certainly you'll be Bluetooth interfaces available as well | |
| Dec 14, 2024 at 13:30 | comment | added | Basj | @periblepsis Wow, this sounds like a fascinating experience! Could you elaborate this into an answer? | |
| Dec 14, 2024 at 11:53 | history | became hot network question | |||
| Dec 14, 2024 at 9:32 | comment | added | periblepsis | Basj, Not cheap, but you can use a very thin, low mass phosphor paint and use it to paint a tiny spot. Then use pulsed light to measure the temperature. I've use a ceramic on a jet turbine fan blade at a rotation rate of 15000 rpm at a measurement rate of 250 sps with excellent tracking. Temp range was -250 C to +450 C with 50 mK resolution. Optical methods are fast. | |
| Dec 13, 2024 at 17:01 | answer | added | bobflux | timeline score: 14 | |
| Dec 13, 2024 at 16:36 | comment | added | jsotola | the temperature sensor is inside an insulated box | |
| Dec 13, 2024 at 15:58 | answer | added | Spehro 'speff' Pefhany | timeline score: 2 | |
| Dec 13, 2024 at 15:27 | comment | added | Eugene Sh. | As for your device, I'd guess the problem is not with the sensor, but with artificially set hysteresis, as it is probably not designed to work with rapidly changing environment. | |
| Dec 13, 2024 at 15:27 | answer | added | Marcus Müller | timeline score: 2 | |
| Dec 13, 2024 at 15:25 | comment | added | Eugene Sh. | Sure they exist. Look at any HVAC controlling thermostat or even electronic thermometers. | |
| Dec 13, 2024 at 15:24 | history | asked | Basj | CC BY-SA 4.0 |