منابع مشابه
An Experimental Study on the Photoelectric Optical Smoke Detector Response
This study investigates the fire safety problem of a smoke detection system in terms of the probable response of light scattering photoelectric smoke detectors. In particular, response characteristics of the smoke detectors were studied experimentally in a test chamber described in UL268, with cotton wick generated fire smoke flowing at a velocity between of 0.5 ms and 3 ms. Measurements of a ‘...
متن کاملOptimization of Sensitivity Characteristics of Photoelectric Smoke Detector to Various Smokes
The photoelectric smoke detector shows different levels of sensitivity to different fire types. The photoelectric detector generally is more sensitive to the gray smoke emitted by smoldering fires, and less sensitive to the black smoke emitted by flaming fires. To improve such a photoelectric detector, the light scattering phenomena by smoke particles have been studied, and numerical simulation...
متن کاملConcerning Hertz’ photoelectric effect
Experimental evidence of the photoelectric effect goes back to H. Hertz. It occurred during the famous confirmation experiments of the Maxwellian theory. It is commonly held however that it cannot be explained in the framework of that theory. We are calling attention to some aspects linked with the interpretation of that effect on which, in our opinion, it is worth-
متن کاملA photoelectric sound-activated relay
cues and they often take precedence over intra-maze stimuli. One possible disadvantage of the present apparatus should be mentioned. A few Ss in the SOW group of each experiment were observed to strenuously oppose box withdrawal throughout training by wedging themselves into the corner between the fixed end wall and the moving floor and side walls. These Ss seldom avoided. Many other Ss display...
متن کاملAn evaluation of photoelectric haemoglobinometers.
A number of photoelectric haemoglobinometers have been evaluated as to their suitability for haemoglobinometry in the routine clinical laboratory. They have been tested for accuracy, precision, linearity of response, instrument comparability and, where relevant, for carry-over. The advantages and defects of each are described.
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ژورنال
عنوان ژورنال: Review of Scientific Instruments
سال: 1948
ISSN: 0034-6748,1089-7623
DOI: 10.1063/1.1741210