Gyeonggi do, South Korea


Gyeonggi do, South Korea
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Knr Systems Inc. | Date: 2016-09-15

Disclosed is a bike simulator including: a base frame; a slope frame rotatably connected to the base frame so as to apply a tilting back and forth to a seated bike; a roll frame fixing a frame of the bike seated on the slope frame and rotatably connected to the slope frame so as to apply a horizontal slope to the bike; and a rear wheel support provided in the slope frame, supporting a rear wheel of the seated bike, and including a load generating unit configured to control rotary force transferred to the rear wheel. In the bike simulator according to the present invention, a bike which an actual user possesses can be fixed and applied, and as a result, the user can feel an extreme realistic traveling sense.

Park J.J.,KNR SYSTEMS Inc. | You W.S.,Sungkyunkwan University | Jin S.M.,KNR SYSTEMS Inc. | Choi H.R.,Sungkyunkwan University | And 3 more authors.
IEEE International Conference on Automation Science and Engineering | Year: 2012

In this paper, we present a point-of-care test equipment which can afford 'flexibility', 'portability' and 'low cost'. Firstly, the system components which include reagent tray, dispensing module, microfluidic disk rotor and photometry scanner, and each of their functions are explained. Then, test results of some of diagnostic tests are included to show the reliability of the point-of-care test equipment. © 2012 IEEE.

La M.,Pohang University of Science and Technology | Park S.J.,Pohang University of Science and Technology | Kim H.W.,Pohang University of Science and Technology | Park J.J.,KNR Systems Inc | And 3 more authors.
Microfluidics and Nanofluidics | Year: 2013

In this paper, a centrifugal force-based serpentine micromixer (CSM) on a plastic lab-on-A-disk (LOD) for biochemical assay was designed, fabricated, and fully characterized with numerical and experimental methods. The CSM comprised two inlets, an outlet, and a serpentine microchannel composed of five circumferential channels with connecting radial channels in one layer. The centrifugal force induced in the rotating disk thoroughly mixed the sample and reagent together throughout the serpentine microchannel of the CSM. Despite its simple geometry, effective mixing performance was achieved inside the CSM because of transverse secondary flows and the three-dimensional stirring effect in the microchannel. Numerical simulation showed that the interfaces of the two streams inside the circumferential microchannel were efficiently stirred by the induced transversal velocity field. The plastic LOD was fabricated by CNC-micromilling on one layer of the thermoplastic substrate, followed by thermal bonding with a cover plastic substrate. Mixing performance of the CSM was also investigated experimentally by means of colorimetric analysis using phenolphthalein. High levels of distributive mixings were obtained within a short required mixing length. As a proof-of-concept example, a biochemical assay of albumin level was successfully determined with the help of the LOD containing the CSM. Owing to the mass-producible simple geometry, excellent mixing performance, and convenience, the CSM can be applied to biochemical assays based on the centrifugal microfluidics. © 2012 Springer-Verlag Berlin Heidelberg.

Kim D.,KNR Systems Inc. | Lee S.,KNR Systems Inc. | Shin H.,KNR Systems Inc. | Lee G.,KNR Systems Inc. | And 3 more authors.
2014 11th International Conference on Ubiquitous Robots and Ambient Intelligence, URAI 2014 | Year: 2014

Although the applications of hydraulic actuators to robotic systems has grown, it is difficult to get the customized components for the research platform. High bandwidth with higher force and torque compared to the electric motor in respect of size and weight has unique area as an actuator for robots. As the easy-getting products, the nozzle flapper type servo valve and actuators has been introduced and the test results for getting technical data for control are shown. © 2014 IEEE.

Cho K.H.,Sungkyunkwan University | Jin Y.H.,KNR Systems Incorporated | Kim H.M.,Sungkyunkwan University | Moon H.,Sungkyunkwan University | And 2 more authors.
IEEE/ASME Transactions on Mechatronics | Year: 2016

This paper presents a robotic system, called Multifunctional Robotic Crawler for Cable INspection II (MRC2IN-II), which is developed for inspection of hanger cables of suspension bridges. The robot can move over hanger cables and perform inspections with instruments such as cameras, Non-Destructive Testing (NDT) tools, etc. The novel mechanisms for the robotic system are proposed under the consideration of the environmental conditions of suspension bridges. Its driving mechanism adopts a crawler type one driven by BrushLess Direct Current (BLDC) motors, and the detachable adhesion tool ensures simple and quick installation procedures. The safe-landing mechanism for emergency situations guarantees the retrieval of the robot while preserving the safety of operators. The paper presents the robot system and its field test results under a super long span suspension bridge, called Yeong-Jong Grand Bridge in Korea. For practical applications, the real environmental conditions of suspension bridge and the other fields where the robot can be applied to are discussed. © 2016 IEEE.

Kalyanasundaram D.,University of Washington | Kim J.-H.,University of Washington | Yeo W.-H.,University of Washington | Oh K.,Nanofacture, Inc. | And 7 more authors.
Analytical and Bioanalytical Chemistry | Year: 2013

Simple and rapid extraction of human genomic DNA remains a bottleneck for genome analysis and disease diagnosis. Current methods using microfilters require cumbersome, multiple handling steps in part because salt conditions must be controlled for attraction and elution of DNA in porous silica. We report a novel extraction method of human genomic DNA from buccal swab and saliva samples. DNA is attracted onto a gold-coated microchip by an electric field and capillary action while the captured DNA is eluted by thermal heating at 70 C. A prototype device was designed to handle four microchips, and a compatible protocol was developed. The extracted DNA using microchips was characterized by qPCR for different sample volumes, using different lengths of PCR amplicon, and nuclear and mitochondrial genes. In comparison with a commercial kit, an equivalent yield of DNA extraction was achieved with fewer steps. Room-temperature preservation for 1 month was demonstrated for captured DNA, facilitating straightforward collection, delivery, and handling of genomic DNA in an environment-friendly protocol. [Figure not available: see fulltext.] © 2013 Springer-Verlag Berlin Heidelberg.

Knr Systems Inc. | Date: 2015-04-30

In the integrated hydraulic rotary actuator according to the present invention, a valve, a sensor, a controller, and a driving unit for controlling the rotary actuator are integrated, so wires connecting them are not exposed to the outside. Accordingly, it is possible to prevent damage due to interference in operation and maintenance is easy. Further, since it is integrated, including a controller, when the actuator according to the present invention is used, connecting with other parts is easy and interference can be reduced. Therefore, it is easy to design and manufacture a resultant product.

KNR Systems Inc. | Date: 2014-12-06

Hydraulic rotary actuator according to the present invention disposes entry and exit lines of the hydraulic fluid within the hydraulic rotary actuator and comprises a floating member with a hollow portion, a rotating member configured to be inserted into the hollow portion, a working fluid supplied to said hollow portion, a servo control valve connected to said floating member configured to control the flow rate, an entry line connected to said servo control valve and further connecting said servo control valve to said floating member, said entry line forming a through-hole that penetrates through said floating member and forming a supply passage for said working fluid, an exit line connecting said hollow portion to said servo control valve and further thereon to outside of floating member, said exit line forming a through-hole that penetrates through said floating member and forming a discharge passage for said working fluid.

Knr Systems Inc. | Date: 2014-07-10

Disclosed are a mobile hydraulic generator having rapid response by scattering a small motor for generating a flow of fluid and a small pump, and a control method thereof. The mobile hydraulic generator includes: a flow generator including n pumps operated by n motors to generate an amount of a hydraulic fluid; a proportional hydraulic control valve to control output hydraulic pressure according to the amount of the hydraulic fluid; a pressure sensor to detect the output hydraulic pressure; and a hydraulic servo loop controller to which required hydraulic pressure and required amount of fluid are input by a user, to which feedback the output hydraulic pressure, to generate a pressure control signal for controlling the proportional hydraulic control valve based on the required hydraulic pressure and a change amount of the output hydraulic pressure and to generate an RPM input signal for controlling RPM of the n motors.

Knr Systems Inc. | Date: 2015-08-10

An apparatus and method for extracting particles are provided. The particle extraction apparatus includes: a main body; a support unit provided in the main body and in which a sample plate is disposed; an extraction unit that can be selectively submerged in a sample of the sample plate and that extracts particles within the sample; a signal generator that generates an electrical signal so as to generate an electrical field within the sample within the sample plate; and a controller that controls operation of the signal generator, wherein particles within the sample are attached to the extraction unit to be extracted by an electrical field generated within the sample.

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