Benefits of Pulsing an IR Source for Gas Detection Systems

  • Thread starter Thread starter skuntz
  • Start date Start date
  • Tags Tags
    Ir Pulse Source
AI Thread Summary
Pulsing solid state IR sources in gas detection systems primarily benefits noise reduction by modulating the IR source at a specific frequency. This technique allows for the mixing of the received signal with the modulation frequency, enhancing the measurement of signal strength. By filtering around the modulation frequency, it effectively minimizes noise interference from DC and ambient light sources. The discussion also references the application of similar methods in IR remote controls as a practical example. Overall, pulsing IR sources can significantly improve the accuracy and reliability of gas detection systems.
skuntz
Messages
2
Reaction score
0
At my business we are beginning the design of gas detection systems using IR. My question is what are the benefits of operating solid state IR sources in a pulsed mode?
 
Engineering news on Phys.org
Are you using FTIR spectrometer? if not can you give little information about the lab setup to have better understanding?
 
skuntz said:
At my business we are beginning the design of gas detection systems using IR. My question is what are the benefits of operating solid state IR sources in a pulsed mode?

It is mainly for noise reduction. You modulate the IR source at some frequency, and mix the received signal with the same frequency (in I and Q often) to measure the received signal strength. You filter strongly around the modulation frequency in the receiver, to help reduce noise pickup from DC, lights, etc.

If you wiki IR remote control, you will see how it's done in typical applications.
 
I used to be an HVAC technician. One time I had a service call in which there was no power to the thermostat. The thermostat did not have power because the fuse in the air handler was blown. The fuse in the air handler was blown because there was a low voltage short. The rubber coating on one of the thermostat wires was chewed off by a rodent. The exposed metal in the thermostat wire was touching the metal cabinet of the air handler. This was a low voltage short. This low voltage...
Hey guys. I have a question related to electricity and alternating current. Say an alien fictional society developed electricity, and settled on a standard like 73V AC current at 46 Hz. How would appliances be designed, and what impact would the lower frequency and voltage have on transformers, wiring, TVs, computers, LEDs, motors, and heating, assuming the laws of physics and technology are the same as on Earth?
Thread 'Electromagnet magnetic field issue'
Hi Guys We are a bunch a mechanical engineers trying to build a simple electromagnet. Our design is based on a very similar magnet. However, our version is about 10 times less magnetic and we are wondering why. Our coil has exactly same length, same number of layers and turns. What is possibly wrong? PIN and bracket are made of iron and are in electrical contact, exactly like the reference design. Any help will be appreciated. Thanks. edit: even same wire diameter and coil was wounded by a...
Back
Top