Wan Cheol
Wan Cheol Park, Seoul KR
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20100015689 | Method For Composting And Treating Food Waste By Using Wood Chips And Apparatus Therefor - The present invention relates to a method of composting and treating food waste by using wood chips and an apparatus therefor. The method and apparatus for the composting and treatment of food waste in accordance with the present invention can recycle food waste as an organic compost by using wood chips in an eco-friendly manner and convert effluents generated from said food waste into an effluent satisfying water quality suitable for discharging by a combined biological and chemical process. Therefore, the present invention can be effectively used for recycling and treating food waste. | 01-21-2010 |
20110203984 | APPARATUS FOR DEODORIZING SEWAGE TREATMENT PLANT SLUDGE BY USING NATIVE MICROORGANISMS - The present invention relates to a deodorizing apparatus using native microorganisms. Specifically, the present invention relates to a deodorizing apparatus using native microorganisms for removal of malodors of sewage treatment plant sludge, comprising a native microorganism activating tank, where a colony of the native microorganisms in a spore state is germinated and activated through a proliferation process under conditions where oxygen and organic materials are supplied, and the native microorganisms returned from a second deodorizing tank is further activated; and a first and a second deodorizing tanks which remove malodorants from untreated matter under conditions where oxygen and the activated native microorganisms are continuously supplied. The deodorizing apparatus of the present invention, which is an eco-friendly and economical method using native microorganisms, can effectively remove malodor generated from various types of sludge including a primary sludge, a secondary sludge, a sludge containing night soil, etc. produced from sewage treatment plants. | 08-25-2011 |
Wan Cheol Yang, Anyang KR
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20080292023 | DIRECT SAMPLING TYPE WIRELESS RECEIVER AND METHOD USING THE SAME - There are provided a direct sampling type wireless receiver and a method using the same that reduce nonlinearity and DC offset by using a multi-port network and a carrier frequency direct conversion method with a low sampling rate of a direct sampling method in a wireless communication receiver. A direct sampling type wireless receiver according to an aspect of the invention includes: a reference signal generation unit supplying a first reference signal having a predetermined frequency and a second reference signal having a higher frequency than the first reference signal; a down sampling unit sampling an input RF signal according to the first reference signal; an analog-to-digital converting unit converting the signal sampled by the down sampling unit into a digital signal according to the second reference signal; and a multiple-input multiple-output port unit dividing the digital signal from the analog-to-digital converting unit into a plurality of digital signals, generating a plurality of carrier signals having different phases from each other by shifting phases of the digital signals, and outputting a plurality of phase signals having different phases from each other by adding the plurality of carrier signals and the plurality of digital signals to each other. | 11-27-2008 |
20100142588 | PARALLEL SEQUENCE SPREAD SPECTRUM TYPE CHAOTIC SIGNAL TRANSMISSION DEVICE - A parallel sequence spread spectrum type chaotic signal transmission device is disclosed to convert a serial data signal into a parallel data signal and transmit a chaotic signal according to the converted data signal. The parallel sequence spread spectrum type chaotic signal transmission device includes: a signal converting unit that converts serial data desired to be transmitted into parallel data having a pre-set unit; a chaotic signal generating unit that generates a pre-set chaotic signal; and an amplifying unit that amplifies the chaotic signal from the chaotic signal generating unit according to the data which has been converted by the signal converting unit. | 06-10-2010 |
Wan Cheol Yang, Gyunggi-Do KR
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20120166121 | APPARATUS FOR DETECTING REAL TIME CLOCK FREQUENCY OFFSET AND METHOD THEREOF - An apparatus for detecting a real time clock frequency offset includes: an overlap detecting unit detecting an overlap signal having overlap information of a predetermined reference clock and a predetermined real time clock; an envelope signal creating unit creating an envelope signal having envelope information of the overlap signal; and a frequency counter unit calculating a frequency of the envelope signal that is a frequency offset of the real time clock, by using a first clock number created by counting the reference clock for one period of the envelope signal and a frequency of the reference clock. | 06-28-2012 |
20140232371 | APPARATUS AND METHOD FOR DETECTING FREQUENCY - There are provided an apparatus and a method for detecting a frequency, the apparatus including a signal converting unit removing a high frequency component from an input signal and then converting the input signal into a digital signal, an edge detecting unit detecting an edge of the digital to thereby generate an edge detection signal having a predetermined magnitude, and a frequency estimating unit generating a pulse signal based on the edge detection signal and averaging the pulse signal at a predetermined interval to thereby estimate a frequency of the input signal. | 08-21-2014 |
Wan Cheol Yang, Gyeonggi-Do KR
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20130080093 | POWER COMPUTING APPARATUS AND METHOD - A power computing apparatus and method is provided. The power computing apparatus includes: a multiplexer configured to receive detected single-phase current and voltage signals and output a single analog signal; an analog-to-digital converter configured to convert the analog signal output from the multiplexer into a digital signal; a demultiplexer configured to separate the digital conversion signal output from the analog-to-digital converter into digital signals representing single-phase current and voltage and output the separated digital signals; a phase detector configured to detect a phase angle between the single-phase current and voltage signals; and a power computing block configured to compute power from the digital current and voltage signals output from the demultiplexer by using error compensation parameter and the phase angle detected by the phase detector. | 03-28-2013 |
20130158909 | POWER QUALITY MONITORING APPARATUS AND METHOD THEREOF - The present invention includes a calculating unit for calculating an absolute value of an applied commercial voltage, an accumulating unit for accumulating the absolute value of the applied commercial voltage per a constant period to output, an extracting unit for sampling an absolute value accumulative maximum value of the commercial voltage for each period and a determining unit for determining a quality of the commercial voltage by using the absolute value accumulative maximum value of the sampled commercial voltage. It has an advantage that the power quality can be monitored at high speed. | 06-20-2013 |
20140046609 | METERING CHIP AND METHOD OF METERING - Provided is a metering chip and a method of metering. The metering chip includes a first analog-to-digital converter connected to an output terminal of a current sensor for detecting a power supply current; and a noise canceller connected to an output terminal of the first analog-to-digital converter and can reduce its power consumption and size while accurately detecting a low current than before. | 02-13-2014 |
Wan Cheol Yang, Suwon-Si KR
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20150185586 | MOTOR DRIVING APPARATUS AND METHOD, AND VOICE COIL MOTOR SYSTEM USING THE SAME - A motor driving apparatus may include: a weight generating unit generating a weight of an external input signal using a damping ratio of a motor apparatus; and a driving signal generating unit generating a driving signal including a first signal generated by reflecting the weight in the external input signal and a second signal corresponding to the external input signal. | 07-02-2015 |
20150188476 | MOTOR DRIVING APPARATUS AND METHOD, AND VOICE COIL MOTOR SYSTEM USING THE SAME - A motor driving apparatus may include: a weight generating unit generating weights of external input signals using a damping ratio of a motor apparatus; and a driving signal generating unit generating a driving signal by converting values of at least some signals among the external input signals to 0 using the weights. | 07-02-2015 |