Abstract:
A polymer linear actuator for a micro electro mechanical system (MEMS) and a micro manipulator for a measurement device of cranial nerve signal using the same are provided. The polymer linear actuator has first and second bodies positioned spaced apart to a distance from each other, and one or more pairs of V-type moving units connecting the first and second bodies together, wherein the moving units in pair are opposed to each other to convert a rotation motion of the respective moving units into a linear motion, thereby causing the first and second bodies to move linearly.
Abstract:
A tetrode for measuring bio-signals, the tetrode including four electrodes which extend in a lengthwise direction of the tetrode and are symmertrically arranged; and an insulation layer which surrounds the four electrodes to insulate the electrodes from each others. A method of manufacturing a tetrode for measuring bio-signals, the method including forming a first insulation layer; forming first and second electrodes on the first insulation layer and forming a second insulation layer on the first and second electrodes; and forming third and fourth electrodes on the second insulation layer and forming a third insulation layer on the third and fourth electrodes.
Abstract:
Disclosed is an electric parking brake (EPB). The EPB includes a carrier at which a pair of pad plates is installed, a caliper housing slidably installed at the carrier and provided with a cylinder in which a piston is installed, a spindle member arranged through a rear wall of the caliper housing and adapted to rotate, a pressing device provided with a nut member screw-coupled with the spindle member to apply pressure and release pressure applied to the piston according to rotation of the spindle member, and an actuator unit to transmit rotational force to the pressing unit. The actuator unit includes a plurality of motors installed at an outer surface of the caliper housing, and a reducer to amplify the driving force and transmit the driving force to the spindle member. Each of the motors is adapted to be independently controlled by an electronic control unit.
Abstract:
Disclosed is a method for manufacturing a fiber-reinforced composite sabot for use in APFSDS (Armor. Piercing Fin Stabilized Discarding Sabot) wherein a plurality of fiber mats are laminated instead of one-directional prepreg ply and whole part is reinforced by stitching through long fiber bundle in order to enhance circumferential shear strength, and high quality fiber-reinforced composite sabot is manufactured in a short time using resin-injection vacuum assisted resin transfer molding after stitching.
Abstract:
Disclosed herein is a bidirectional moving micro-robot system. The bidirectional moving micro-robot system has a first body having a plurality of legs foldably/unfoldably connected thereto, a second body having a plurality of legs foldably/unfoldably connected thereto and a connection member having both end portions respectively connected to the first and second bodies. In the bidirectional moving micro-robot system, the length of the connection member exposed between the first and second bodies is extended or contracted.
Abstract:
Disclosed is a method for manufacturing a fiber-reinforced composite sabot for use in APFSDS (Armor Piercing Fin Stabilized Discarding Sabot) which has improved strength to weight ratio with low weight and high strength by using one-directional fiber prepreg ply lamination method. In order to prevent delamination of the radially laminated composite sabot, short fibers are deposited on the interfacial plane thereby spreading the expansion force to fiber as well as the resin.
Abstract:
This disclosure relates to a micro manipulator having a simple structure and having high possibility of recording a biological signal of a neuron at a desired position by improving positioning resolution of an electrode disposed adjacent to a subject's brain neuron or an electrode holder attached with the electrode. The micro manipulator according to the disclosure includes: a motor which includes a shaft and a vibration portion; a mobile which is connected to the shaft so as to be movable along the shaft; and a frame which supports the motor, wherein an electrode is connected to the mobile in a direction parallel to a longitudinal direction of the shaft, and wherein when the mobile moves linearly in accordance with a vibration of the shaft due to the vibration portion, the electrode moves linearly.
Abstract:
The present invention relates to an impedance transformation-type wide band internal antenna. The wide band antenna includes a radiation part, a short circuit part, a feeding part, and a feeding pin. The radiation part is formed to have a predetermined length and width according to an operating frequency, the radiation part including a plurality of stubs formed in arbitrary shapes according to location of a plurality of slots. The short circuit part causes part of a side surface of the radiation part to be connected to an external ground. The feeding part is extended from the stubs, formed on the side surface of the radiation part to be adjacent to the short circuit part, and is bent multiple times, the feeding part being formed on a bottom surface of the radiation part to have a predetermined length and width. The feeding pin is formed on an end of the feeding part and is fed with current. Accordingly, the present invention is advantageous in that impedances are matched using the length and interval of the feeding part, which is bent multiple times, and the size of a through hole formed in the feeding part, so that a plurality of wide band resonant frequencies is formed, thus enabling the wide band antenna to be simultaneously used for different frequency bands in a wireless communication system that uses different frequency bands.
Abstract:
Disclosed is a parking brake device of a disk brake. The parking brake device includes a caliper housing including a finger unit and a body part to push pad plates, which are installed at both sides of a disk, to closely make contact with the disk, a cylinder provided in the body part of the caliper housing, a piston slidably provided in the cylinder to move the pad plates toward the disk by using driving force generated from hydraulic pressure or mechanical thrust force, a cam unit provided at a rear portion of the cylinder to transform rotation motion of a parking brake lever into linear motion of the piston, and including an operating shaft, a ramp, and a ball, and a push rod which delivers linear motion of the cam unit into the piston. A flange part of the push rod is coupled to an open front end of the ramp having a cylindrical shape by using grooves or protrusions, so that the push rod is easily prevented from rotating.