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clark.zhang
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Join Date: Nov 2012
Posts: 5

How Coal Mine Fiber-optic Camera Works in Dark When There is No Infrared Light?

11/26/2012 2:11 AM

Dear engineers and professor,

As we all know that it is forbidden to use infrared light under coal well, because it may cause explosion, so we need to use unique explosion proof camera and fiber-optic module for monitoring, but I am confused that, the coal well is usually very very deep and roal also much swerve, so how the camera could detect the image without infrared and transmit the signals, the signals will loss much in deep, dark, wet and swerve environment when make transfered, anyone who have done this job before could help me?It is obviously that not everyone has do coal mine work, peopel are very little, so I ask here to ask for if any engineer who could offer me the solution?also the camera is fixed?

thanks very much in advance

Clark
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Pathfinder Tags: coal mine explosion proof camera
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IdeaSmith
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#1

Re: how coal mine fiber-optic camera work at dark when there is no infrared light?

11/26/2012 3:04 AM

You maybe mix up infrared as transfer signal with coal being monitored in infrared light.

A light signal in the fibre optic cable will navigate through the corridoors of your mine just fine and uneffected by the low visibilty in a coal mine.

Infrared light fed into your camera will show you in all this darkness the warm coal.(If you never slept on a conveyer belt you dont know how warm it is.)

Again the signal is transferred in the fibre optics cable with the advantage that when it breaks it still probably does not amount to be a ingition source of the gasses and dust in your mine.

While Infrared light is not permitted in your mine it still probably there. If not your camera will have to respond to the normal spectrum of light.

Hope someone else can help you more.

IS

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clark.zhang
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Join Date: Nov 2012
Posts: 5
#5
In reply to #1

Re: how coal mine fiber-optic camera work at dark when there is no infrared light?

11/26/2012 9:00 PM

thanks so much,and I will do more search and learn more before I go into real action Clark
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Joshi
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#2

Re: how coal mine fiber-optic camera work at dark when there is no infrared light?

11/26/2012 3:07 AM

Your answer is in this link.

Golder | UK | Services: Mining Instrumentation & Communications
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clark.zhang
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#6
In reply to #2

Re: how coal mine fiber-optic camera work at dark when there is no infrared light?

11/26/2012 9:02 PM

tks a lot
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ozzb
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#3

Re: how coal mine fiber-optic camera work at dark when there is no infrared light?

11/26/2012 7:36 AM

Just about any thing that gives off heat will transmit some of it as infrared. You, Me, the equipment in the mine, even the coal.

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clark.zhang
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Join Date: Nov 2012
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#7
In reply to #3

Re: how coal mine fiber-optic camera work at dark when there is no infrared light?

11/26/2012 9:23 PM

yes,you are quite right,tks
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lyn
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#4

Re: How Coal Mine Fiber-optic Camera Works in Dark When There is No Infrared Light?

11/26/2012 11:26 AM

Are there any regulatory organizations wherever you are????

Any insurance companies?

Any guide lines for cameras?????

Any other coal mines in the area that might know something about your query?

Have you performed an search at Search GlobalSpec for "explosion proff cameras"???

What have you done so far??
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clark.zhang
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#8
In reply to #4

Re: How Coal Mine Fiber-optic Camera Works in Dark When There is No Infrared Light?

11/26/2012 9:29 PM

we deal explosion proof cameras,and we make much trainments when we sale this cameras,and it is strictly that anyone who install our device should have the capability install license issued by government,because all our device is used in flammable hazard environment
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phph001
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#9

Re: How Coal Mine Fiber-optic Camera Works in Dark When There is No Infrared Light?

11/27/2012 5:00 AM

This is nowhere near my specialty, but reading around confirms the general idea that there is a lot of infrared radiation around coal mines and slag heaps already. I cannot see that the tiny amount of power emitted by a camera infrared illuminating source can possibly detonate anything. In any case, what is wrong with a white light illuminator?

http://www.isprs.org/proceedings/XXXVII/congress/8_pdf/2_WG-VIII-2/08a.pdf
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vargaalex
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#10

Re: How Coal Mine Fiber-optic Camera Works in Dark When There is No Infrared Light?

11/27/2012 9:02 AM

You could also look at using ultraviolet spectrum or low light sources.
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clark.zhang (4); IdeaSmith (1); Joshi (1); lyn (1); ozzb (1); phph001 (1); vargaalex (1)

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