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    A novel approach of improving battery performance and longevity of the developed electrically assisted triwheeler vehicle by implementing torque sensor technology
    (© 2017 Hindawi Limited, 2017) Al Rashid, Md Jaber; Rahman, Ataur T.A.; Siddique, Abu Raihan Mohammad; Azad, Akm M.M.Abdul Malek
    This paper presents a new approach to improving the battery performance and its longevity by the implementation of torque sensor pedal technology on the developed electric triwheeler vehicle (i.e., wheelchair). The paper has also discussed integration of the torque sensor technology with the overall electrical system of the vehicle. Incorporating the components of torque sensor technology reduces the human effort immensely by providing assistance from the battery bank to drive a hub motor while maneuvering the wheelchair using the torque sensor pedal. Field tests were carried out in three different stages, one with pedal, one with the throttle only, and with varying the load on the wheelchair, to distinguish the effect of load test on battery performance using the pedal. Results of the field tests reveal that the state of charge of batteries has been minimized using the pedal due to the contribution of the muscular energy of the user along with the battery energy to meet the total energy demand of the motor. Analyzing test results with the torque sensor pedal clarifies that the vehicle covers a longer distance, lessens power dissipation from the batteries, and reduces energy consumption from the batteries, which leads to improvement of the battery performance and its longevity ensuring sustainability of the electric vehicle.
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    Luminous measurement of LED lights in cost effective way using cylindrical method
    (© 2016 Elsevier Ltd, 2/1/2017) Haque, Fahimul; Azad, Akm M.M.Abdul Malek
    Because of several Solar Home System (SHS) components’ manufacturers in the market, overall quality of LED lamps fluctuates from organization to organization. There is an increment in unsteady quality with the number of SHS installation, which eventually causes system ineffectiveness. As a result, testing of LED lamps used in SHS plays significant role in maintaining the quality. However, existing procedures i.e. integrated sphere, goniophotometer method for lumen testing are quite costly in Bangladesh's perspective; so we have used our handmade cylindrical black box of different dimensions and sizes in CARC (previously known as CARG) lab, BRAC University. In this research we have included the testing results collected from our measurement process and also have established some relevant equations from what we have measured the total lumen of the light sources. Moreover, we used graphical analysis to find out the characteristics of different cylinders under different conditions.