Brisk Research into Properties of High-speed Parallel Mechanisms being Conducted
Department head of Faculty of Mechanical Science and Technology Song Myong Sop and his research group have been intensifying their research into high-speed parallel robot in a brisk way to make further progress.
Last year after 3-year-long study, they finally succeeded in devising ball-joints and reduction gears, the most important parts of 3-DOF parallel robots, in conformity with the world trend, and they built all the components with domestically available material. They presented their success to the 70th founding anniversary of the university and now they are active in introducing it to several sectors of the national economy. The working space of this robot is 160mm in diameter.
Respiratory Capacity Measuring Device Developed
The research group led by Rim Jong Ho, department head of Faculty of Biology and Medicine Engineering, have developed a computer-combined respiratory capacity measuring device and are working to further improve its efficiency.
By strenuous efforts they chose a convenient-to-use measuring method and designed the structure uniquely. Besides they managed to find out reasonable constant values that are suitable for the physical features of the children in our country and for making correct judgment of their physiological functions. Then they combined the device and a computer so that the measuring process can be monitored in real-time. Thus, they were able to obtain respiration curves through the flow measurement of the respiratory process of human body and on the basis of this they determined tens of test indexes for respiratory capacity that can accurately assess the functions of lungs such as maximum expiratory capacity, one-round breathing capacity and maximum inspiratory capacity, thereby ensuring scientific diagnosis of respiratory diseases thoroughly relying on domestic equipment.
Since introduced in a hospital it has gained public favor for its convenience. It’s also being applied to education practice of several major subjects like “Biomedical information Processing”, “Digital Signal Processing”, “Neural Network” and so on.
Gamma Spectrum Analyzer Developed
Choe Pyong Min, Vice Dean for Scientific Research of Faculty of Resources Probing Engineering, and his research group have developed our own type of gamma spectrum analyzer which is of great significance in exploration of minerals, and have been expanding their successes.
After 3 years of painstaking efforts they developed a four-channel portable gamma spectrum analyzer that makes it possible to analyze the content of elements in mineral rocks directly on the spot without extracting samples from them. Subsequently they succeeded in a gamma spectrum analyzer with higher accuracy and higher temperature stability. Not content with their achievements they are making constant efforts to further raise its analysis accuracy.
Stepping up with introduction of the laser vibrating meter
A research group of Kim Chol Hyon, a teacher of Faculty of Physics Engineering succeeded in developing the laser vibrating meter which can measure the number of vibration of micro-vibrating things as well as the width of vibration by dividing them into tens of nanometers so as to add successes to different aspects of the national economy.
Development of the technology of measuring the 3-dimension outline by means of laser
A research group of head of the Physics Engineering Faculty developed the technology for measuring precisely the 3 dimension outline of the thing by means of the injection of the straight line laser and processing the value of co-ordinates with the computer so that they could make a great contribution to different aspects of the light industry and public healthcare and physics culture including clothing and shoes industry.
They devised the precise micro-vibrating apparatus which can inject the outline of the thing with the straight line laser and detect its light lines and also developed the 3-dimension producing program to get more correct outline of the thing. At present this research group is channeling a great effort to improving the accuracy of this technology.
Development of the gas-detecting transmitter and application technology of micro-bubble
The research team including Jang Chol Min, head of laboratory of Nano Physics Engineering Institute developed the gas-detecting transmitter and application technology of micro-bubble, and are building on its success.
They succeeded in developing the gas-detecting material which is capable of detecting quickly and precisely ammonia, hydrogen sulfide and carbon dioxide in the air and on the basis of this, they also developed the automatic gas-detecting transmitter which is capable of measuring and controlling the gas in the given building in real time by manufacturing the solid-state detector which has higher adaptability to environment, lasts longer and is much cheaper than an electrical and chemical way.
They also introduced the micro-bubble technology into purification of waste water so that they could speed up the disintegration of aerobic microorganism into organic materials, and created the reliable technical guarantee for discharging purified water by establishing the process of purifying waste water bio-chemically which can improve the average characteristic indices of water quality such as biochemical and chemical requirement for oxygen and ratio of removing ammonia nitrogen in comparison with the general porous plant by 10 or 20 % and decrease the consumption of electric power to less than 80 % by means of oxidization of organic polluting material which are impossible to decompose with radical ions generating micro-bubbles.
As a result of introduction in one stock-farm, this technology proved very efficient and economic.
In the future, fruitful will be their continuous research for applying it to various fields including purification of water as well as production of crops and vegetables, aquatic culture, IC cleansing, floriculture and preservation of freshness of fishes.
New grounding resistance electrometer
The research group led by Choe Ji Myong, the head of a laboratory in the Faculty of Electronics Engineering, developed a new grounding resistance electrometer that can measure the grounding resistance of the power electronic system with the correctness of below ±0.1Ω, opening up the broad prospect of preventing the destruction of electric and electronic products and ensuring the safe management by designing and manufacturing with their own efforts the devices with the automatic switching function on a measuring zone of 0.1~1kΩ. Now, the group is continuously pushing forward the research project to develop the wireless power transmitting system.
Establishment of the New Hot Blast Drying Process for CMYK Offset Duplicator
Pak Se Il and his research team of the Faculty of Heat Engineering succeeded in establishing the hot blast drying process for CMYK which is using electrically heated air.
They proposed to use electrically heated air instead of propane gas to dry the printing material in the CMYK hot blast offset duplicator and made clear the characteristics of drying printing material and the relationship of different elements which have influence on the quality and output of products and consumption of electricity of the printing material while they are dried. They also designed the new heat switchboard which is capable of making an effective use of the heat of waste air at different temperatures of more than 110℃ giving off during the period of drying so that they could economize a large amount of energy needed in drying the printing material.
They constructed the control system in keeping with the operation conditions so that rational indices of the operation were determined which made it possible to establish the hot blast drying process using electrically heated air.
New Magnesia Cement Developed
Ra Chung Yol and Cho Yong Yon, researchers from the Faculty of Resources Probing Engineering have developed white magnesia cement, green building material, from our own brucite marble, and greatly contributed to the industrialization.
Newly developed white magnesia cement can be produced in the existing process in the factory without establishing a new process and its pressure strength is 42MPa. As the burning temperature is 100~200℃ lower in comparison with dolomitecement and the range is between 400℃ and 700℃, it consumes less fuel andconvenient to produce. In particular the whiteness is over 88%, so it is far superior to another magnesia cement. Therefore, it is being used as good finishing building materials.
Research on Tiezo Resistive Differential Pressure Tranducer Activated
The research group in the Semiconductor Institute including Rim Chang Sik, Ri Won U has made a great achievement in the researchwork to develop the differential pressure transducer necessary for measuring the fluid amount.
This project is the tiezo resistive differential pressure transducer which measures the high-temperature steam fluid in the thermal power station and the flowing amount of fluid with high pressure and temperature in the chemical industry.
The research group selected a lot of materials appropriate to different differential pressure forming modes, reliable in high pressure and temperature and sensitive to the variation of pressure and designed and trialed while precisely changing the shape and structure of the diaphragm, thereby solving many scientific and technological problems such as the material and structure of the diaphragm, the manufacture, and the placement of the diaphragm, and the sensitivity and the precision. By doing so, they have opened a bright prospect of developing with our own technology the differential pressure measuring device which is cheap and has great precision of 1%FS in measuring the pressure difference of various bands from 1 to 50KPa
Cubic Structure Attitude Control Experimental Instrument Developed
Li Gyong Il, lecturer of the Faculty of Automation Engineering has developed a cubic structure attitude control experimental instrument.
Though in need of reference data, he mathematically modeled the geometrical size, material selection, centre of mass of each part and inertial moment to develop a system of attitude stabilization control system and confirmed the reliability of the instrument through scores of simulations and linkage experiments. The cubic structure attitude control experimental instrument he developed is a valuable one not only for the students’ experiment but also for checking up the efficiency of the attitude control algorithm used in the ultra-miniature equipment.
Not satisfied with his result, he keeps making a profound research to develop the attitude stabilization control system with jump-up and corner as a fulcrum.
Wireless Elastic Wave Measuring Instrument developed
Kim Il Hyok, lecturer of the Faculty of Resources Probing Engineering, has developed the wireless elastic wave measuring instrument which is widely used in practice.
This instrument is used to rationally determine the covering layer of a waterway tunnel by measuring the strength of the bedrock. Newly developed elastic wave measuring instrument is composed in the form of radio system and graph display and sensors are installed so as to serve as a measuring duster in any position without confusion. Therefore it is very fast and measuring work is done conveniently and the best thing about this instrument is that it has no telegraphic interruption and noise.
High-efficiency V-conical Flowmeter Developed
Section chief Jong Il Chol and other scientists at the Faculty of Automation have newly developed a V-conical flow meter.
This flow meter, thanks to its structural characteristic, has an advantage of allowing short length of a linear tube fixed at its head and tail.
In addition, as it is capable of cleaning itself, it never gets contaminated or blocked up even when measuring the flow of multi-phase fluid, which has fluid or its particles mixed in the gas, or gas or its particles in the fluid.
And the tightening components are wear-resistant thanks to its protective function, ensuring long and stable operation.
In particular, it provides high measurement accuracy despite the small amount of fluid, and operation stability. It can also be used to measure the flow of fluids such as exit gas or sewage because it can even measure that of high pressure (10MPa) and high temperature (500℃).
Diamond Crown developed
The research group with Doc. Associate Prof. Ri Jae Myong, head of Department of the Resources Probing Engineering Faculty as the project leader developed to complete a diamond crown and succeeded in realizing it as products.
They made success in the lab research on the diamond crown which is used as the rock crushing tools in the field of drilling. Not satisfied with this, they conducted the test of performance and introduction on several occasions in several sites including the construction sites of power stations to solve scientific and technological problems that can increase the length and speed of drilling to a great extent as compared with the imported ones.
By dint of their efforts, they can be able to firmly ensure the production of the diamond crown at home which was formerly relied on import.
Industrial Water Analyzer Developed
Industrial Water Analyzer developed by scientists of Electronic sensor and device Lab including Kim Kum Chol, the section chief of Faculty of Electronics, is taking a great effect in several fields of the national economy.
They developed various kinds of sensors whose technical indices like precision, speed, band and temperature are on a high level and newly completed the circuit design of water analyzer and its analyzing program with their own efforts. Also they made it possible to connect to the computer anywhere and under any circumstances and established the process for serial production.
The analyzer can make real-time measurements of pH value, oxygen and ion concentration, electrical conduction, oxidation-reduction potential, temperature, etc. all at once and control various water indices automatically in combination with computer.
Realization of the integrated automation system of salt production process with underground saline water
Scientists of various units of the university including the Faculty of Automation Engineering, the Institute of Electric Power Systems, the Faculty of Electronics made a great success in realizing the integrated automation system of salt production process with underground saline water.
They exactly developed and established process management program, remote control program, history management program, single phase and overcurrent protection system and light load observation system by investigating the operation stateof water pumping motors arranged in a great number of salt fields, density of evaporating pond and crystallization pond and waterline of catchment area in detail. By doing so they enabled to put production and management on a higher level, producing a great amount of high-quality salt with less labour and time.
New Plastic fishing boat
Ri Yong Ho, the section chief of Ship Engineering Lab and other colleague researchers of the Faculty of Naval Architecture and Ocean Engineering designed and made a new plastic fishing boat of high economic efficiency.
This Lab has designed and built the plastic fishing boat which is becoming the global trend with a lighter tonnage, less fuel consumption and longer life than iron ships and wood ships in consonance with the realities of our country by dint of our own strength and technology, thus greatly contributed to the development of the country’s shipbuilding industry.
Research group headed by Dr. Ra Ju Hyon, head of Faculty of Metal Engineering, succeeded in the production of stainless steel on domestic natural resources, thus greatly contributed to the realization of the production of stainless steel Juche-orientated. Dr. Ra Ju Hyon carried out further research on the production of ferrous-alloys from Nickel and Chrome, which are essential for making all alloys but rare in our country and at last succeeded in the production of ferrous-alloys from domestic resources.
The research group applied new scientific and technological method to produce ferro-nickel and ferro-chrome from domestic raw materials. They made stainless steel melting trial and successfully produced stainless steel of good standard. Succeeding in the trial production, a real possibility to produce enough stainless steel urgently needed in several fields of the national economy was obtained.
The research team from Metallic Engineering faculty realized the computer-control technology of the high-impedance super-high electric power steelmaking furnace and succeeded in the production process automation factories and enterprises in the metal industry field. Ambitious for exploiting the cutting edge area of steelmaking-process automation, the research group challenged upon modern steel making technology, which is of great significance in the metal and machine industries.
They developed the system by each level for the control of the workshop, equipment and the program for inspection control designed and manufactured the equipments such as equipments of electrode lifting, power equipments and control board to make a successful computer-controlled trial operation. They developed the control system software for mould streamline in our own way for trial automatic operation. With the realization of the computer-control of the high-impedance super-high electric power steelmaking furnace, they have achieved higher level of furnace productivity and vitalized our metal industry.
Teachers and researchers of Department of Physics including Ri Gyong Ho, Assistant Prof. and Chief of Acoustic Engineering Lab and others developed several products applying ultrasonic techniques of cutting-edge technology, proving their effects in various fields of the national economy.
The team initiated an ultrasonic generator reliable under any loads in our own way and developed several products such as ultrasonic cleaner of different sizes (25, 40kHz), an ultrasonic humidifier, an ultrasonic disperse emulsifier, an ultrasonic thickness gage and a portable ultrasonic flaw detector.
On the basis of such successes, they are continuously making an active research work to develop new products, among them comes first an high intensity focoused ultrasound (HIFU) therapy.
Hospital information system actively proceeded
The research team leaded by Sin Jae Yong, PhD and Prof, rector of IT College and other member teachers including Mun Chang Hyok and Jong Il Ryong opened a remarkable prospect for decisively improving the quality of medical curing and prevention work of our university's hospital by their energetic research work for making its medical service and management based on the IT.
They built clinical data warehouse for hispital information system for clinical decision support and real-time decision making, and developed a muti-demensional analysis system and a signature system of electronical medical information exchange system between medical organs.
Taking advantage of their successes they continue to introduce their new IT medical system into all the hospitals of the country on the international healthcare standard.
Research into Mt. Paektu Volcano in Full Swing
Mt. Paektu, the ancestral mountain of Korea and the sacred mountain of the revolution, is the focus of attention of volcanologists in many countries around the world as a dormant one.
A Mt. Paektu volcano research group consisting of geophysicists from the Resources Probing Engineering Faculty including Kim Kang Sop, a department chief of the faculty, and the Academy of Engineering Science has been conducting systematic research into Mt. Paektu volcano since the beginning of the present century based on its over 30 years of experience on magnetotelluric method.
The focus of the research was to shed light on the magma shape and its movement deep underground as clearly as possible by combining the magnetotelluric (MT), gravitational and magnetic survey and volcanic fluid dynamic simulation. Research results on the MT data processing, cross gradient joint inversion, body growth inversions of gravity data were made public through three papers in the Journal of Applied Geophysics, the SCI magazine.
The research results on the 3D HT dynamics of Mt. Paektu volcano based on the geophysical survey data were issued in the International Seminar on the Research of Mt. Paektu Volcano at the Sci-Tech Complex cosponsored by MPGG and PIINTEC in August Juche 105(2016), and the Future Research Project on Mt. Paektu Volcano in the Royal Society in June Juche 106(2017).
Compressed Air Driving 3 Channel Switching Valve Developed
The Department of Industrial Furnace Engineering of the Faculty of Metal Engineering has developed in Korean way a switching valve, which constitutes the two core elements together with the honeycomb regenerator in high-temperature air combustion (HTAC) technology, which proves effective in putting Juche iron production on normal footing.
The research team led by Department chief Kim In Gyu set the switching valve in a 3 channel switching mode to suit the characteristic features of the high-temperature air combustion furnace in which gas is alternatively combusted on both sides of the combustion chamber, and selected the compressed air-type driving mode, which is simple in structure, and very reliable and swift in action.
They checked up the stability of valve surface and axis with the structural mechanical and hydrodynamic characteristics based on computer simulation, and designed a rational structure dimension of body according to the opening height with minimum pressure loss and the input-output diameter of air and waste gas.
The switching valve has been recognized as a research achievement of great economic value as it is applicable to large furnaces, does not make much noise, and is free from any waste gas leakage and risk of explosion.
Scientific Research on the Hard-alloyed Injector
The research team in the complex material department, whose chief researcher is Dr. and Associate Professor Kim Jong Gon, a department head of the Material Engineering Faculty, has developed in their own way the hard-alloyed injector which consists of WC, Co and TiC, and has been succeeding in introducing them into different fields of the national economy.
Scientific Research on the Ultra-high Voltage Diodes
Candidate Acad., Prof. and Dr. Ri Sin Ung, chief researcher in the Semiconductor Institute and the researchers in the semiconductor laboratory and the semiconductor pilot plant have designed in their own way the ultra-high voltage diodes which is essential in the dust collector for protecting the x-rays and other medical equipment and the ecological environment, and established the relevant manufacturing processes.
Hexagonal Hive-typed Regenerator
Dr. and Associate Professor Kin In Gyu, head of the department of metal engineering, and the teachers and researchers in the department of industrial furnace engineering have developed in their own way the hexagonal hive-typed regenerator which constitutes the main factor of the high-temperature air combustion technology and made a great success in introducing the rolling heating furnace, cookpot heater, fireproof kiln in which the burning temperature should be maintained to over 1 700℃ and the glass dissolving furnace into the different fields of the national economy.
Portable Inversion-typed Plasma Cutter
O Yong Nam, researcher of the Nano Physical Engineering Institute and other researchers in the plasma laboratory developed and introduced the efficient portable inversion-typed plasma cutter by using the inversion technology to make a great contribution to the development of the national economy, and were awarded the certificate of registered domestic cutting-edge technical product.