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In order to comprehensively evaluate and improve the performance of the Rogowski coil electronic current transformer (RCECT), this paper presents a method for steady state characteristic and the dynamic characteristic test. The testing scenario is configured in an electromagnetic transient simulation software (PSCAD), then the digital signals are reproduced as analog signals by amplifiers. The sensor...
It has been observed that amongst all the 22 languages being used Devanagari script is being the primary and most widely used script. Devanagari is used for writing the Hindi language in India. In this paper Energy Efficient Devanagari Unicode Reader has been designed. Devanagari is used for writing the Hindi language in India. In this paper Devanagari Unicode Reader code has been implemented on Xilinx...
A new method of high precision frequency measurement is proposed based on the non-AD sampling and non-analog circuit. First, the input signal is shaped by the digital system's comparison of hysteresis, then the shaped signal is measured by the equal precision frequency measurement method, through which the none synchronized phase problem is eliminated successfully. Second, the proposed method is no...
For the common failure of motor rotation, a reliable acquisition and detection device of motor rotation signal is designed, and the general design scheme of the test system and the implementation of hardware and software are given. The system consists of high-speed frequency counter chip FPGA module and the SOPC system structure, using NIOS II as the system control unit to control the work of the...
In this paper, we discuss an embedded digital measurement system based on FPGA for motor's speed. In order to overcome the shortcomings of T method and M method, the improved M/T method is used. According to the principle of improved method, the motor's speeding signals of four channels are measured and the communication with PMC bus is attained. The hardware of system is composed of photoelectric...
The new unified shaper of the primary trigger input signals of the KEDR detector at VEPP-4M was developed. General structure of the primary and secondary triggers of the KEDR detector is described.
In the paper we describe a method to extract the topography of an impressed current for our bounded electrical impedance tomography (bEIT) studies. The frequency of the impressed current is low (up to a few hundred Hz), and is buried in background EEG and other noise. For the development of the extraction method, special consideration is given to maximize the signal-to-noise ratio. The standard lock-in...
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