Wavelength-Division Multiplexing Optical Transmission for EMI-Free Indoor Fine Particulate Matter Monitoring

Wavelength-Division Multiplexing Optical Transmission for EMI-Free Indoor Fine Particulate Matter Monitoring

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Air pollution has become a global issue from the perspective of public health and the social economy.Of the various air pollutants, fine particulate matter (PM2.5), which is less than 2.

5 micrometers in diameter, can cause serious health problems such as asthma, lung cancer, respiratory diseases, cardiovascular disease, birth defects, and premature death.The ability to have accurate dust information in real-life is very important for patients with respiratory illnesses.Visible-light communication, which performs the functions of illumination and data transmission in indoor environments, could be utilized for the long-term transmission of important environment information, even in places where RF transmissions are restricted, such as medical TV Stand with Fireplace centers, emergency rooms, or nursing homes.

In this paper, a prototype of a wavelength division multiplexing optical transmission system is proposed for electromagnetic interference-free indoor dust monitoring.Important indoor environment information, such as dust concentration, temperature, and relative humidity, are transferred by red green blue (RGB) light sources.A single RGB-type white light-emitting diode and a single color sensor are adopted to enable a low-complexity implementation.

An average voltage-tracking technique is utilized for robust light detection to eliminate ambient light and low-frequency noise.The incoming RGB lights are separated by a color sensor, and are simultaneously processed by a receiver microcontroller.Medical experts and patients can then monitor indoor air quality in Spindle Mixer Parts and Accessories real-time, and they can improve the environmental awareness of individuals.