In today’s world, with increasing price of fuels, depletion of natural resources and pollution levels mounting up, an eco friendly and cheap alternative fuel in automobiles can be implemented. A hydrogen fuel cell makes it possible by converting the hydrogen to electricity that powers the vehicle. The proposed green fuel is hydrogen which is combined with oxygen inside the fuel cell. The byproduct is water which can be used for purposes like irrigation, domestic and industrial uses after treatment. The fuel cell efficiency is dependent on its moisture content and so a MEMS based humidity sensor is proposed for measuring the humidity
The UHF RFID system removes the requirement for manual processes, by improving inventory visibility performs workflows automation but these RFID tags cannot perform well in the existence of metallic items. In this paper , a unique UHF RFID tag antenna which can be suitable for metallic objects is put forward. The micro strip antenna is composed of two substrates isolated by an air layer the upper substrates is implemented with a folded dipole and two slots inserted at the end of the dipole. Second substrate is double-faced, parallel bars and metal plane on upper and lower face respectively. The printed parallel bar is to enlarge the bandwidth of the antenna by employing multi resonant bands. The main aim of the proposed antenna is to improve the antenna gain and to bring the return loss better than -10dB.
In latest days, the amount of cars has risen dramatically. As a result, free parking space has become a issue, particularly in metros. This raises the demand for the development of a semi-automated car parking system, which makes effective use of room and prevents traffic congestion. But the operation and maintenance of such a car parking system is very difficult. Earlier, the parking spaces available for parking were tracked by human staff, which was very time consuming. Here, we have created a semi-automatic parking scheme that provides a distinct parking slot for each vehicle. Therefore, the driver does not need to search for a vacant slot. This scheme also requires less manpower. Any number of cars entering or leaving the zone at the same time may also be accommodated. This stops the driver from stopping at the door. The system is extremely energy efficient by turning on the lamps in the parking area only when the vehicle is on the move, which makes it distinct from most parking schemes. A research on current systems shows that there are automated systems based on sensor networks or video systems that monitor the existence of vehicles and the accessibility of free parking spaces. They lack the benefit of giving each vehicle a distinctive slot, thus generating confusion when many vehicles arrive at the same time
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