Author Topic: Virus outbreak in Wuhan, China - Thermal cameras likely to be deployed again  (Read 3921 times)

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Online Fraser

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I just read that a previously unknown strain of the Coronavirus has appeared in Wuhan, China.
It appears to be closely related to the SARS virus and causes respiratory problems and even death. As with the previous SARS outbreak, the virus causes a fever. I believe it highly likely that ports of entry into many countries will now deploy their countermeasures against the spread of this nasty virus. One countermeasure is to monitor the passengers entering a country at ports by using thermal cameras configured for human skin temperature sensitivity and set to alarm on anyone who exhibits elevated skin temperature so that further tests may be carried out and questions asked.

Thermal cameras can be a very effective means to screen large numbers of people for illnesses that cause a fever. To be effective, the thermal cameras need to be good quality radiometric types with good resolution and known accuracy. Reference “Blackbody’ sources are commonly used in the field of view as a known temperature reference.

Those travelling through ports, especially in Asia may see these camera systems operating at designated health check points or on the passport check approach. Those travelling to Wuhan need to take care, it sounds nasty.

New China virus: Number of cases jumps as infection spreads to Beijing https://www.bbc.co.uk/news/world-asia-china-51171035

Fraser
« Last Edit: January 20, 2020, 11:30:22 am by Fraser »
 

Online Fraser

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Sci-Hub will help to read this paper on the effectiveness, or not, of thermal cameras to spot SARS.

https://www.ncbi.nlm.nih.gov/pubmed/15719959

Fraser
 

Online Fraser

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Another interesting paper...

https://www.ncbi.nlm.nih.gov/pubmed/16044829

Fraser
 



Online Fraser

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Comment on use of thermography in the detection of SARS.

https://irinfo.org/06-01-2003-seffrin/
 

Online Fraser

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Thermal camera use against SARS in Singapore

https://www.wsj.com/articles/SB105148535546154300
 

Offline Vipitis

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Have you ever seen fever scan system sold on the used market? Or do they just get store at the airports for future use? It would a great calibrated camera and black body reference...
 

Online Fraser

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No surprises, FLIR thermal cameras have been popular for SARS detection. There are other specialist thermal cameras that are designed specifically for fever detection though.

https://flir.gcs-web.com/static-files/1e785e26-da6a-4778-9650-f6c2d8ce8c6e
 

Online Fraser

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Vipitis,

No I have not seen any on the secondary market yet. The specialist models made for Port of entry fever detection are still quite new and likely get stored in a SARS or other Virus response kit when not needed. I would not expect to see any used ones until newer, better, models replace the originals. The dedicated fever detection thermal cameras are basically medical thermography cameras configured to provide the best possible imaging over a relatively narrow temperature range to cover the human bodies skin temperature of the head. Alarm functions are added and the cameras have excellent temperature stability over the narrow temperature range. The Blackbody provides the required accurate reference for the system. Those Blackbody references are very nice indeed. Compact and accurate. Bill W told me that many use a micro machined surface to provide a high performance emission surface.

I remember seeing a UK company on the news that has produced a compact thermal camera for the specific needs of SARS screening at ports of entry. I shall have to see if I can find them and provide details.

Fraser
« Last Edit: January 20, 2020, 10:59:05 am by Fraser »
 

Online Fraser

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I went straight to the UK company that makes a miniature fever scanning thermal camera. As I suspected, it is Thermoteknix who make it and the required screening software.

They are using a Miracle camera with dedicated software. See attached pictures.

http://www.thermoteknix.com/products/oem-thermal-imaging/fevir-scan-fever-screening-system/

Fraser
« Last Edit: January 20, 2020, 11:04:34 am by Fraser »
 

Online Fraser

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I am interested to see that Thermoteknix show a ISOTECH 988 Blackbody as the temperature reference in their FeVir kit. I own one of those  8). The 988 was designed as an accurate calibration check source for medical use infrared thermometers and thermal imaging devices. It has a temperature range of 20C to 45C with a resolution of 0.01C.

https://www.isotech.co.uk/infrared-calibrators/general-purpose/general-purpose/blackbody-source-model-988

This Blackbody was reviewed by me on this forum some time ago. It is based on a PID, H-Bridge driver and Peltier Element. The emission plate has concentric ring grooves in its surface to aid performance.

Fraser
 

Online Fraser

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My look inside the ISOTECH 988 medical use Black Body reference source....

https://www.eevblog.com/forum/thermal-imaging/thermal-camera-black-body-calibration-check-source-inside-the-isotech-988/

It is worthy of note that the 988 temperature range is limited only by the PID boundary temperature setting and may be increased to -5C to +80C if desired. Lower temperatures than -5C causes significant frost formation and higher temperatures than 80C exceed the safe operating temperature of the Peltier element and shortens its life.

Fraser
« Last Edit: January 20, 2020, 07:31:57 pm by Fraser »
 

Online Fraser

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Fever detection through thermography demonstration video using FLIR static camera.

https://youtu.be/sYAFLxwA4H4

Fraser
 

Online Fraser

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Not surprisingly, many thermal camera manufacturers have been keen to push their cameras for fever detection duties.

https://www.testo.com/en-UK/products/thermography-fever-detection

 The problems arise when a camera is more of a generic model that requires the user to carefully configure it. Dedicated solutions such as that from Thermoteknix enable easy deployment and use with custom software providing exactly what the user needs in an easily understood manner.

Even SATIR have tried to push their cameras for fever detection. Let’s just say I do not personally have a great deal of confidence in their products ! YMMV  ;)

https://satir.com/application/thermal-imaging-and-fever-detection

I doubt SEEK Thermal cameras are used in this particular application as many have excessive levels of uncertainty when it comes to radiometric measurement accuracy. Horses for courses.

Fraser
« Last Edit: January 20, 2020, 02:57:29 pm by Fraser »
 

Online Fraser

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Interesting FLIR document on fever screening.

https://www.overloadsrl.it/easyUp/file/ebola%201.pdf

Fraser
 

Offline Vipitis

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The FevIR core is similar to the one I got. Just the radiometric variant, I believe the software parts I acquired have some documentation about FevIR operation as well.

I wonder how well a stationary hot source holds over a long period. Even with a shutter the sensor might drift on those pixels.
 

Offline Stray Electron

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there was ebola outbreak in africa. if you got infected, no thermal camera will be any use to you.

   The cameras aren't intended to help you, they're intended to keep you out of the country and to keep you from infecting other people.
 

Online Gyro

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I was travelling back from Taiwan during the last SARS outbreak and they had the cameras set up at Hong Kong. I'd taken a nasty gluten hit the previous day (I'm Coeliac) and was terrified that they would drag me aside and I would miss my flight (or worse). I've never managed to hunch down so low before or since (I'm 6'3"). I must have looked really suspicious! :D


P.S. Come to think, do don't remember now, ever not seeing cameras, I think they may be semi-permanent at some hub airports (like HK).
« Last Edit: January 20, 2020, 02:25:47 pm by Gyro »
Chris

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Online coppice

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In the 2003 SARS outbreak all the crossings between HK and China quickly installed thermal cameras above every immigration counter. They are were all Chinese products, but I can't remember which brand. HK airport installed thermal cameras with a much wider field of view, to spot people as they flowed towards the immigration area. Someone with a spot check IR thermometer went up to anyone looking excessively warm on the thermal camera, and checked their forehead up close.
 

Online Bud

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The liberated E4 has the Screening feature.
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Offline JohnG

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Interesting, because I had to walk through such screening crossing from Shenzhen to Hong Kong in mid December.

John
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Online blueskull

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We (SUSTech, Southern University of Science and Technology) already have robotic forehead temperature sensors deployed at out entrances, and in addition, security guards manually test everyone coming in with a thermal gun.
 

Offline tautech

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Interesting, because I had to walk through such screening crossing from Shenzhen to Hong Kong in mid December.

John
For me the same at the Futian crossing coming back to HK from a day in the Shenzhen heat although in late 2014 they pulled you aside and pointed the camera at your forehead.
I guess I must have looked like a tomato but they waved me through after a temp check.
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Offline Cat

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Here a few screenshots from the german television news Tagesschau showing the use of thermal imagers.
The thermal imager in the first part has a white housing with cooling vents and is mounted on a pole. Unfortunately the resolution is too low to read the marking.
The imager in the second part is obviously from NEC.

Source (could be geoblocked):
https://download.media.tagesschau.de/video/2020/0120/TV-20200120-2222-3101.webxl.h264.mp4
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