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In this paper, we propose new detectivity enhanced infrared detectors in which metamaterial cells are used to harvest the IR energy. Analytical models are developed and numerically verified to predict the behavior of the proposed detectors. Detectivity improvement factor (DIF) is defined to compare the performance of the proposed detectors with traditional ones. Numerical results show that the proposed...
Using metamaterial structures, a novel Infrared (IR) detector is proposed to operate at the frequency of 180 THz. It has been shown that using metamaterials can concentrate the field in the semiconductor region (here InGaAsSb) resulting in higher absorption and higher detectivity for the IR detector. The proposed structure has been analyzed using full wave numerical methods. The simulation results...
This paper presents a method to design a kind of power supply (PS) using PID (Proportional, Integral, and Derivative) controller. AVR microcontroller, atmega16 has been used in designing PS. Nowadays most of industrials systems use microcontrollers. PS is the integral part in each of them. A good idea is using these processors in order to generate the needed power for other parts of the systems. Especially...
This paper presents a method to design a smart circuit to interface with some protocols such as RS232, USB, CAN, and the most important of all: Ethernet. The main feature in the designed circuit is using Real Time Operating System (RTOS) on ARM series 32-bit processors: LPC2478. Compared with the customary ways to control and data acquisition, the device based on the embedded system offers better...
This paper presents a Real Time Operating System (RTOS) for using in AVR microcontrollers. Using RTOS can result to eliminating processor waiting without doing any applicable work. By using RTOS a lot of tasks can be run independently and simultaneously. So the CPU's efficiency will be higher than conventional systems with infinite loops. Although there are too many RTOS like QNX, they are not free...
one of the most important industrial computers' bus is Industry Standard Architecture (ISA) gap. At lost ISA could communicate with 8 bits data but nowadays it can communicate with much data bits. Only 8 bits has been used in this article, because the data are in one-byte formats. With ISA gap of the computer an interface circuit could be designed between computer and systems such as temperature control...
This paper presents a method to regulate the power, which transferred through an electromagnetic coupling link by adjusting the resonant operating frequency of its primary side. By receiving a feedback signal from the secondary side the needed power will be found and accordingly the resonance frequency will be adjusted. This is particularly useful when the wireless system is used to provide the needed...
A wireless energy transfer structure has been proposed in this paper. Wireless energy transfer based on coupled magnetic resonances is a technology which energy can be transferred via coupled magnetic resonances in the non-radiative near-field. Based on this structure, a simple model has been introduced, analyzed and simulated. Experimental results for verifying this model show that the model works...
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