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dust measuring mechanisam on pv panel

Dulithk

Anybody here to suggest a method (sensor) to measure dust on a glass surface (photo voltaic) without going to image processing? #help

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  • A variation on what Shabaz is suggesting is to shine a light onto the surface at a shallow angle so that most of the light is reflected towards a light sensor. Make sure the light sensor is shielded so it can only "see" the reflecting area. A black tube aimed at the reflecting area should work. Modulate the light source so you can just look for the amplitude of the ac component of light detected by the sensor. This will make the system insensitive to ambient light variations. Neither the light source nor the sensor need to be directly over the surface, so sunlight is not blocked. Dust will scatter some of the reflected light so the more dust on the surface, the smaller the ac signal.

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  • A variation on what Shabaz is suggesting is to shine a light onto the surface at a shallow angle so that most of the light is reflected towards a light sensor. Make sure the light sensor is shielded so it can only "see" the reflecting area. A black tube aimed at the reflecting area should work. Modulate the light source so you can just look for the amplitude of the ac component of light detected by the sensor. This will make the system insensitive to ambient light variations. Neither the light source nor the sensor need to be directly over the surface, so sunlight is not blocked. Dust will scatter some of the reflected light so the more dust on the surface, the smaller the ac signal.

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