Previous in Forum: Clarification on API Inspection and Plant Inspection   Next in Forum: Thermocouple Construction of Type T Bare Wire
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
10 comments
Rate Comments: Nested
clark.zhang
Member

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
Register to Reply
Pathfinder Tags: coal mine explosion proof camera
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
IdeaSmith
Guru

Join Date: Mar 2012
Location: Out of your mind! Not in sight!
Posts: 4424
Good Answers: 108
#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

__________________
 Common Sense Dictates
Register to Reply
clark.zhang
Member

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
Register to Reply
Joshi
Guru

Join Date: Oct 2007
Location: India
Posts: 1246
Good Answers: 34
#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
Register to Reply
clark.zhang
Member

Join Date: Nov 2012
Posts: 5
#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
Register to Reply
ozzb
Guru
Hobbies - Fishing - Old Salt Hobbies - CNC - New Member United States - US - Statue of Liberty - New Member

Join Date: Mar 2007
Location: Rosedale, Maryland USA
Posts: 5197
Good Answers: 266
#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.

__________________
 Life is not a journey to the grave with the intention of arriving in a pretty, pristine body but rather to come sliding in sideways, all used up and exclaiming, "Wow, what a ride!"
Register to Reply Score 1 for Good Answer
No more "Almost" Good Answers.
clark.zhang
Member

Join Date: Nov 2012
Posts: 5
#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
Register to Reply
lyn
Guru

Join Date: Oct 2008
Posts: 42355
Good Answers: 1693
#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??
Register to Reply
clark.zhang
Member

Join Date: Nov 2012
Posts: 5
#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
Register to Reply
phph001
Guru

Join Date: Oct 2009
Posts: 1460
Good Answers: 30
#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
Register to Reply
vargaalex
Power-User

Join Date: Dec 2010
Location: Tulsa, OK
Posts: 184
Good Answers: 2
#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.
Register to Reply
Register to Reply
Have a Different Question?
10 comments

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
Copy to Clipboard

Users who posted comments:

clark.zhang (4); IdeaSmith (1); Joshi (1); lyn (1); ozzb (1); phph001 (1); vargaalex (1)

Previous in Forum: Clarification on API Inspection and Plant Inspection   Next in Forum: Thermocouple Construction of Type T Bare Wire

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Quality Assurance / Control:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (54 right now)
Show Members
Advertisement