• 한국정보디스플레이학회:학술대회논문집
• /
• 한국정보디스플레이학회 2008년도 International Meeting on Information Display
• /
• pp.1370-1373
• /
• 2008

This paper introduces a novel display measuring instrument that allows accurate, spectro-radiometric measurement of the complete viewing cone while the measuring time is similar to that of a CCD camera with transform lens optics. Actually the new instrument, named POLYGONIOSCOPE, is orders of magnitude faster compared to a conventional spot spectrometer.

• 대한물리의학회지
• /
• 제6권3호
• /
• pp.277-286
• /
• 2011

Purpose : This study was to investigate the prevention of spasticity with modified Ashworth scale(MAS) and range of motion(ROM) increase with goniometer in ankle joint by functional electrical stimulation(FES) and exercise for 4 weeks in chronic stroke patients. Methods : 60 chronic stroke patients participated in this study. The subjects were divided into 3 groups, FES group(n=20), FES+exercise group(n=20) and control croup(n=20). After FES application on tibialis anterior muscle by 35Hz for 4 weeks, the change of ankle joint movement was measured by goniometer. Results : The spasticity in ankle joint was decreased greatly in FES and FES+excercise groups(p<.05), and the ROM of ankle joint was increased greatly in FES and FES +exercise groups(p<.05) than control group(p>.05). Conclusion : It shows that FES made the angle of dorsiflexion in spastic ankle joint increase with functional improvement of tibialis anterior muscle in chronic stroke patients. This show that the FES is avaliable for facilitation of ROM and decrease of spasticity as a therapeutic tool.

• International journal of advanced smart convergence
• /
• 제8권4호
• /
• pp.154-160
• /
• 2019

In this paper, we propose the miniaturization size of wearable Range of Motion(ROM) and a system that can be connected with smart devices in real-time to measure the joint movement range dynamically. Currently, the ROM of the joint is directly measured by a person using a goniometer. Conventional methods are different depending on the measurement method and location of the measurement person, which makes it difficult to measure consistently and may cause errors. Also, it is impossible to measure the ROM of joints in real-life situations. Therefore, the wearable sensor is attached to the joint to be measured to develop a miniaturize size ROM device that can measure the range of motion of the joint in real-time. The sensor measured the resistance value changed according to the movement of the joint using a load cell. Also, the sensed analog values were converted to digital values using an Analog to Digital Converter(ADC). The converted amount can be transmitted wireless to the smart device through the wearable sensor node. As a result, the developed device can be measured more consistently than the measurement using the goniometer, communication with IoT-based smart devices, and wearable enables dynamic observation. The developed wearable sensor node will be able to monitor the dynamic state of rehabilitation patients in real-time and improve the rapid change of treatment method and customized treatment.

• 한국정밀공학회지
• /
• 제22권3호
• /
• pp.170-178
• /
• 2005

The purpose of this study is to develop a gait-event detection system, which is necessary for the cycle-to-cycle FES control of locomotion. Proposed gait event detection system consists of a signal measurement part and gait event detection part. The signal measurement was composed of the sensors and the LabVIEW program for the data acquisition and synchronization of the sensor signals. We also used a video camera and a motion capture system to get the reference gait events. Machine learning technique with ANN (artificial neural network) was adopted for automatic detection of gait events. 2 cycles of reference gait events were used as the teacher signals for ANN training and the remnants ($2\sim5$ cycles) were used fur the evaluation of the performance in gait-event detection. 14 combinations of sensor signals were used in the training and evaluation of ANN to examine the relationship between the number of sensors and the gait-event detection performance. The best combinations with minimum errors of event-detection time were 1) goniometer, foot-switch and 2) goniometer, foot-switch, accelerometer x(anterior-posterior) component. It is expected that the result of this study will be useful in the design of cycle-to-cycle FES controller.

• 한국HCI학회:학술대회논문집
• /
• 한국HCI학회 2009년도 학술대회
• /
• pp.418-421
• /
• 2009

본 논문은 표면 근전도 신호(sEMG)를 이용해 상지부의 동작을 실시간으로 예측하고 이를 기반으로 한 인간-기계 상호작용(Human-machine interaction)에 관한 것이다. 사용자의 상지부에 위치한 5 곳의 근육에서 수집하는 근전도 신호와 인공신경회로망(arfiticial neural network) 알고리즘을 이용하여 상지부 동작을 실시간으로 예측하였고, 기계팔(manipulator)이 예측된 동작을 좇아 움직이도록 제어되었다. 이때, 사용자가 기계팔의 끝단(end-effector)과 접촉해 있는 상태에서 상지부 동작은 2 차원 평면 위에서 이루어지도록 제한된다. 본 논문이 제안하는 동작 예측 방법과 인체 각도계(goniometer)를 이용한 경우의 상호 작용 실험을 통해, 동작 예측을 통한 인간-기계 상호 작용의 성능을 알아보았다. 실험 결과로부터, 제안된 실시간 동작 예측 방법을 이용하여 사용자와 기계의 상호 작용 시스템을 구현할 수 있음을 알 수 있다.

• 대한물리치료과학회지
• /
• 제19권2호
• /
• pp.25-33
• /
• 2012

Purpose : The purpose of this study was to investigate, The Effects of Massage and Taping on Muscle Strength and Flexibility and Pain with Delayed Onset Muscle Soreness(DOMS). DOMS is a common problem that can interfered with rehabilitation as well as activities of daily living. Methods : Thirty subjects untrained were randomly assigned into Massage group, Taping group, Massage and Taping group. Treatment were applied at 24 hours, 48 hours and 72 hours after induction DOMS. The effects of Massage and Taping and Muscle strength and flexibility on DOMS were evaluated by a goniometer and dynamometer and taping and VAS sheet. Results : The results of this study were as follow : 1) There was a significant difference among Taping group, Massage group, Taping and massage group in the case of using graduator. The interaction of group shown a significance (p<.05). 2) In the case of using goniometer, all three groups had the significant difference in period (p<.05) and the interaction of group-period shown a significance(p<.05). 3) In the case of using VAS, all three group had the significant differences in period(p<.05) and the interaction of group-period shown a significance(p<.05). Conclusions : These findings suggested that Taping and Massage had effect on DOMS.

• 한국군사과학기술학회지
• /
• 제21권4호
• /
• pp.471-480
• /
• 2018

Accurate target coordinate is very important in military operations especially field artillery's ground-to-ground attack and air-force's air-to-ground attack. DOS(or TAS) is used to acquire target coordinates from long distance. DOS is comprised of LRF and goniometer. LRF measures distance between DOS and target. Goniometer is comprised of azimuth and vertical angular sensors, DMC and internal GPS receiver. DOS must set the position and orientation(finding grid north) before measurement step(target coordinate acquisition). To improve accuracy of target coordinate, VRS RTK and reference point method are proposed in DOS setup step. VRS RTK provides accurate location coordinate with small deviations, providing high accuracy and precision in positioning and orientation. As a result, horizontal coordinate(easting and northing) accuracy is improved from 2.68 mil(C.L. = 0.95) mil to 0.58 mil(C.L. = 0.95).

• 대한전기학회논문지:시스템및제어부문D
• /
• 제55권7호
• /
• pp.313-318
• /
• 2006

An automatic sample centering system is underway at the protein crystallography beam line of the Pohang Light Source to improve the efficiency of the crystal screening process. A sample pin which contains a protein crystal is mounted on a goniometer head. Then the crystal should be moved to the center of X-ray beam by controlling the motorized goniometer to obtain diffraction data. Since the X-ray beam is located at the center of the image obtained from the CCD camera when the image of the sample pin is in focus, an auto-focusing algorithm is a very important part in the auto-sample-centering system. However the results of applying several well-known auto focusing algorithms directly to the images are not satisfactory owing to the following factors: misalignment of CCD camera, non-uniform cryo-stream in the background of the image and the supporter of the loop. The performance of an auto-focusing algorithm can be increased if the algorithm is applied to only the loop region identified. Non-uniform cryo-stream and a various illumination condition and a stain, which is shown in the image, are main obstacles to loop region identification. In this paper, a simple loop region identification algorithm, which can solve these problems, is proposed and the effective ness of the proposed scheme is shown by applying the auto-focusing algorithm to the loop region identified.

• The Journal of Korean Physical Therapy
• /
• 제29권3호
• /
• pp.145-151
• /
• 2017

Purpose: The purpose of this study was to investigate the validity and reliability of the measurement of shoulder joint motions using an inertial measurement unit (IMU). Methods: For this study, 33 participants (32 females and 1 male) were recruited. The subjects were passively positioned with the shoulder placed at specific angles using a goniometer (shoulder flexion $0^{\circ}-170^{\circ}$, abduction $0^{\circ}-170^{\circ}$, external rotation $0^{\circ}-90^{\circ}$, and internal rotation $0^{\circ}-60^{\circ}$ angles). Kinematic data on the shoulder joints were simultaneously obtained using IMU three-dimensional (3D) angular measurement (MyoMotion) and photographic measurement. Test-retest reliability and concurrent validity were examined. Results: The MyoMotion system provided good to very good relative reliability with small standard error of measurement (SEM) and minimal detectable change (MDC) values from all three planes. It also presented acceptable validity, except for some of shoulder flexion, shoulder external rotation, and shoulder abduction. There was a trend for the shoulder joint measurements to be underestimated using the IMU 3D angular measurement system compared to the goniometer and photo methods in all planes. Conclusion: The IMU 3D angular measurement provided a reliable measurement and presented acceptable validity. However, it showed relatively low accuracy in some shoulder positions. Therefore, using the MyoMotion measurement system to assess shoulder joint angles would be recommended only with careful consideration and supervision in all situations.

• 조명전기설비학회논문지
• /
• 제17권5호
• /
• pp.1-7
• /
• 2003

배광분포를 측정함으로써 조명기구의 모든 광학적 특성을 계산해낼 수 있으며 이를 바탕으로 조명설계를 수행할 수 있다. 이러한 일련의 측정과 해석을 위해 배광측정기의 개발시에 배광해석용 소프트웨어 개발이 동시에 이루어져야 한다 연구진이 현재 개발하고 있는 소프트웨어는 조명기구의 광학적 특성을 파악하는 데 있어, 상당히 유용한 기능들을 포함하고 있다. 또한, 조명설계에 있어 근본적인 문제 해결의 과학적 검증을 제공함은 물론, 더 나아가 조명계산에 있어 하나의 표준을 마련하는 데 기여할 수 있을 것으로 보인다.