• Title/Summary/Keyword: 3D probe

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Development of a Ultrasound Probe for 3-D Ultrasonic Imaging (3차원 의료기기용 초음파진단기 프로브 개발)

  • Park, Jong-Soo;Kim, Seong-Rae;Nam, Yoon-Su
    • Journal of Industrial Technology
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    • v.25 no.A
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    • pp.87-93
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    • 2005
  • Three-dimensional ultrasonic probes being applied to the medical imaging can be grouped into three depending on the scanning methods, which are a mechanical type system, a free-hand system, and 2D phased arrays system. A mechanical type scanner uses a mechanically driven transducer to acquire series of 2D plane images. By integrating these images, a 3-D medical image can be constructed. A motor driving mechanism is a conventional choice for mechanically driving a transducer assembly which picks the raw ultrasonic images up. In this paper we attempt to design a 3D ultrasonic probe which has a operating mechanism of s tilting 3-D scanning. The motion of a transducer assembly of the ultrasonic probe is analytically modelled. We propose a selection procedure for the diameter of a wire rope driving the transducer assembly and the size of torsional spring which gives an initial tension to wire ropes.

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3-Axial Isotropic Electric-Field Probe Design with Resistor-Loaded Short Dipole (저항 부하된 소형 다이폴을 이용한 3축 등방성 전기장 프로브 설계)

  • Moon, Sung-Won;Jang, Byung-Jun
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.28 no.3
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    • pp.246-249
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    • 2017
  • In this paper, we designed the 3-axis isotropic electric-field measurement probe using resistor-loaded short dipole with lumped chip resistors. The designed probe shows good isotropic characteristics as well as wideband and low sensitivity. The isotropic characteristics of ${\pm}0.39dB$ from 100 kHz to the 3 GHz band were derived and the reception sensitivity was 0.1 V/m. The frequency response is within 3 dB of the whole section, especially ${\pm}1.3dB$ from 150 kHz to 3 GHz, which is superior to the conventional electric field probe with short dipoles.

A Study of Development for Contact CMM Probe using Three-Component Force Sensor (3 분력 힘 센서를 이용한 CMM 용 접촉식 프로브의 개발에 관한 연구)

  • 송광석;권기환;박재준;조남규
    • Journal of the Korean Society for Precision Engineering
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    • v.20 no.8
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    • pp.101-107
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    • 2003
  • A new mechanical probe for 3-D feature measurement on coordinate measuring machines (CMMs) is presented. The probe is composed of the contact stylus and the three-component force sensor. With the stylus mounted on the force sensor, the probe can not only measure 3-D features, but also detect contact force acting on the stylus tip. Furthermore, the probing direction and the actual contact position can be determined by the relationship among three components of contact force to be detected. In this paper, transformation matrix representing the relationship between the external force acting on the stylus tip and the output voltages of measurement gauges is derived and calibrated. The prototype of probe is developed and its availability is investigated through the experimental setup for calibration test of the probe. A series of experimental results show that the proposed probe can be an effective means of improving the accuracy of touch probing on CMM.

Calibration/Compensation of Errors of the Touch Probe (접촉식 프로브의 오차교정 및 보정기술)

  • 박희재;이교일
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.18 no.8
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    • pp.2081-2087
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    • 1994
  • Touch trigger probes are widely used for inspection purposed in the CMM(Coordinate meauring machine) or machine tool. The errors introduced by measurement probe are fairy systematic, thus can be calibrated and compensated properly. This paper presents a technique for the error calibration and compensation of the probe errors, which can be easily applicable to the manufacturers and users of the measurement probe. The probe coordinate system is defined for the probe error assessment, and a reference sphere ball is measured, and the probe errors are calibrated. The calibrated probe errors are represented in the 3D error map and 2D error map along probing direction. Detail algorithms for the error compensation are proposed.

A Study on the Development of iGPS 3D Probe for RDS for the Precision Measurement of TCP (RDS(Robotic Drilling System)용 TCP 정밀계측을 위한 iGPS 3D Probe 개발에 관한 연구)

  • Kim, Tae-Hwa;Moon, Sung-Ho;Kang, Seong-Ho;Kwon, Soon-Jae
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.11 no.6
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    • pp.130-138
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    • 2012
  • There are increasing demands from the industry for intelligent robot-calibration solutions, which can be tightly integrated to the manufacturing process. A proposed solution can simplify conventional robot-calibration and teaching methods without tedious procedures and lengthy training time. iGPS(Indoor GPS) system is a laser based real-time dynamic tracking/measurement system. The key element is acquiring and reporting three-dimensional(3D) information, which can be accomplished as an integrated system or as manual contact based measurements by a user. A 3D probe is introduced as the user holds the probe in his hand and moves the probe tip over the object. The X, Y, and Z coordinates of the probe tip are measured in real-time with high accuracy. In this paper, a new approach of robot-calibration and teaching system is introduced by implementing a 3D measurement system for measuring and tracking an object with motions in up to six degrees of freedom. The general concept and kinematics of the metrology system as well as the derivations of an error budget for the general device are described. Several experimental results of geometry and its related error identification for an easy compensation / teaching method on an industrial robot will also be included.

The Development of 3D based On-Machine Measurement Operating System (3D 기반의 기상측정 운영시스템 개발)

  • 윤길상;최진화;조명우;김찬우
    • Journal of the Korean Society for Precision Engineering
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    • v.21 no.7
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    • pp.145-152
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    • 2004
  • This paper proposed efficient manufacturing system using the OMM (on-machine measurement) system. The OMM system is software based 3D modeler for inspection on machine and it is interfaced tool machine with RS232C. The software is composed of two inspection modules that one is touch probe operating module and the other is laser displacement sensor operating module. The module for touch probe has need of inspection feature that extracted it from CAD data. Touch probe moves to workpiece by three operating modes as follows: manual, general and automatic mode. The operating module of laser displacement sensor is used inspection for profile and very small hole. An Advantage of this inspection method is to be able to execute on-line inspection during machining or after it. The efficiency of proposed system which can predict and definite the machining errors of each process is verified, so the developed system is applied to inspect the mold-base(cavity, core).

Effects of Settings in Dynamic Ranges and Frequency Modes on Ultrasonic Images (초음파 영상에서 동적영역과 주파수 방식의 설정에 따른 효과)

  • Yang, Jeong-Hwa;Kang, Gwan-Suk;Lee, Kyung-Sung;Paeng, Dong-Guk;Choi, Min-Joo
    • Journal of radiological science and technology
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    • v.32 no.3
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    • pp.277-283
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    • 2009
  • It is important to get clinical ultrasonic images of good quality for accurate diagnosis. In this study, it observed the change of ultrasonic images against setting frequency, dynamic range(DR) and type of probes on ultrasonic scanner. In the experiment it evaluated image of LCS (Low Contrast Sensitivity) targets(-15, -6, -3, +3, +6, +15 dB) of a standard ultrasonic test phantoms(539,551, ATS, USA) similar to solid and cystic lesions. Its imaged from convex (C3-7IM) and linear probe (L5-12IM) on SA-9900 (Medison Ltd, Korea) scanner. The images obtained altering the setting parameters which are frequency(gen, pen, res, harmonic) mode and DR($40{\sim}100\;dB$). The quality of images evaluated compare with the nominal LCS value of target and measured LCS value. The results show that there was no significant changing of quality images altering DR 40, 60, 80, 100 dB against frequency in Convex probe but the image being the highest in LCS target at DR 60 dB, harmonic of frequency mode in the -15 dB target close to cystic lesion. In Linear probe, DR 40 dB, harmonic mode at -15 dB LCS target close to nominal value. It discussed necessity of evaluation about ROC(Receiver Operating Characteristic) from the psychological viewpoint and limit of evaluation from quantified images.

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Construction of Static 3D Ultrasonography Image by Radiation Beam Tracking Method from 1D Array Probe (1차원 배열 탐촉자의 방사빔추적기법을 이용한 정적 3차원 초음파진단영상 구성)

  • Kim, Yong Tae;Doh, Il;Ahn, Bongyoung;Kim, Kwang-Youn
    • Journal of the Korean Society for Nondestructive Testing
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    • v.35 no.2
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    • pp.128-133
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    • 2015
  • This paper describes the construction of a static 3D ultrasonography image by tracking the radiation beam position during the handy operation of a 1D array probe to enable point-of-care use. The theoretical model of the transformation from the translational and rotational information of the sensor mounted on the probe to the reference Cartesian coordinate system was given. The signal amplification and serial communication interface module was made using a commercially available sensor. A test phantom was also made using silicone putty in a donut shape. During the movement of the hand-held probe, B-mode movie and sensor signals were recorded. B-mode images were periodically selected from the movie, and the gray levels of the pixels for each image were converted to the gray levels of 3D voxels. 3D and 2D images of arbitrary cross-section of the B-mode type were also constructed from the voxel data, and agreed well with the shape of the test phantom.

Design and Fabrication of the Ka-band Waveguide to Microstrip Transition using Probe structure (프로브 구조를 이용한 Ka 대역 도파관-마이크로스트립 트랜지션의 설계 및 제작)

  • Kwon, Hyuk-Ja;Lee, Sung-Ju;Jang, Ho-Joon
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.45 no.7
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    • pp.67-71
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    • 2008
  • We report the waveguide to microstrip transition using probe structure for Ka-band transceiver. The waveguide to microstrip transition is composed of probe, inductive line, ${\lambda}/4$ impedance transformer, and $50{\Omega}$ microstrip line. For design of the transition, we optimized the characteristic impedances and the lengths of the component parts. The fabricated transition exhibits an insertion loss of 1.3 dB and the input/output return losses of below 14 dB between 30 and 40 GHz. The insertion loss of each transition is about $0.5{\sim}0.6dB$, considering the losses in the microstrip line and input/output waveguides.