000 03586ntm a2200361 i 4500
001 vtls000105303
003 KUKTEM
005 20251117113438.0
008 180926t20182018my a f a m 001 0 eng d
020 _aTHE0007941(Local)
039 9 _a201906131106
_bazli
_y201809261124
_zfateeha
040 _aUMP
_beng
_cUMP
_erda
090 _aFTeK .N87 2018 r Thesis
100 0 _aNurulain Nadhirah Shaipuzaman,
_eauthor.
245 1 0 _aDesign and development of an optical sensor system to measure the visibility of air /
_cNurulain Nadhirah Shaipuzaman
264 1 _aKuantan, Pahang :
_bUMP,
_c2018
264 4 _c© 2018
300 _axii, 101 pages :
_billustrations (some color) ;
_c30 cm. +
_e1 CD-ROM
336 _atext
_2rdacontent
337 _aunmediated
_2rdamedia
337 _acomputer
_2rdamedia
338 _avolume
_2rdacarrier
338 _acomputer disc
_2rdacarrier
347 _atext file
_bPDF
_2rda
500 _aFaculty of Engineering Technology
502 _aThesis (Master of Science) -- Universiti Malaysia Pahang – 2018
504 _aIncludes bibliographical references
520 3 _aPeople normally relate visibility with clarity. In meteorology, visibility is a measure of the distance at which an object or light can be clearly recognised. Visibility for a medium depends on the visible light transmission (VLT). This research describes the development of VLT measurement system to measure the visibility of air. Even though there are many types of devices that can measure VLT, each of them have their own weakness and disadvantages. Some of the devices are only suitable to be used to measure VLT for thin medium such as tint film and glass. Although VLT device for a wide medium measurement already exist, it has its own disadvantages such as big in size and the cost is relatively very expensive. There are other problems related to VLT measurement devices such as they are fails to function well at night, some of them can only carry out point measurement and faces a several errors especially in rainy, foggy and smoky conditions. Therefore an alternative VLT measurement system to cater all the above problems and weaknesses is reported in this research. The VLT measurement system reported in this thesis is using an open path method where a laser pointer is used as a light source and a spectrometer for the detector. A transmittance for a few pieces of known VLT tint films percentage is obtained and set as a measurement base. The transmittance measurement is carried out at 537.65 nm and this value is associated to VLT percentage. A relation between the transmittance and VLT percentage is obtained and a linear regression line is plotted. The linear regression line model is developed and it is hardcoded into a Laboratory Virtual Instrument Engineering Workbench (LabVIEW) program in order to measure VLT percentage in real time. Experimental works is carried out to measure VLT percentage of air consist of smoke in a polymer chamber. It is found that the developed measurement system is capable to measure VLT percentage of air in 1 meter path in less than 1 s. The VLT percentage measurement using this developed system is verified by a commercial sensor called Dustmate. The result shows the reading for VLT percentage is aligned for both devices.
610 2 0 _aFaculty of Engineering Technology
_xDissertations
650 0 _aUniversities and colleges
_xDisertations
650 0 _aTheses
999 _aVIRTUA40
_c8799
_d8805
999 _aVTLSSORT0080*0200*0400*0900*1000*2450*2640*2641*3000*3360*3370*3371*3380*3381*3470*5000*5020*5040*5200*6100*6500*6501*9992