• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2000년도 추계학술대회 논문집
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• pp.445-447
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• 2000

The terminal and core(wire conductor) in a Harness processing is connected by putting them in a applicator by virtue of a manual operation. A normal or abnormal condition of crimping connections is nearly determined by a skilled worker. In general, a skilled worker operates a press motor with a foot switch by pressing on foot and puts a wire conductor into a press with one hand. By doing so, sufficient efficiency is not obtained by a worker. In this paper, a basic study has done to make improve an efficiency by finding the normal arrangement out as to whether a terminal and wire conductor in Harness are placed on the right position or not with a quadrant plane photo position sensor.

• 제어로봇시스템학회논문지
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• 제21권2호
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• pp.157-161
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• 2015

For machining systems having a high precision positioning with a long stroke, it is necessary to examine the repeatability of reference position decisions. Though ball-screw driven linear stages equipped with encoders have high precision feed drivers and a long stroke, they have some limitations for reference position decisions if they have not been equipped accurate home sensors. High precision machining technology has become one of the most important aspects of the development of a precision machine. Such a machine requires high precision positioning as well as high speed on a large workspace. This study is performed to experimentally compare the repeatability for home position decisions in the case of photo sensors and hall sensors as a home switch of the ball-screw driven linear stage.

• 제어로봇시스템학회논문지
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• 제22권4호
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• pp.271-275
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• 2016

For machining systems like the motor driven linear stage which have high precision positioning with a long stroke, it is necessary to examine the repeatability of the reference position decision. Though piezo (PZT) actuator driven linear stages have high precision feed drivers and a short stroke, they have some limitations for reference position decisions if they have not been equipped with an accurate home sensor. This study was performed to examine the repeatability for home position decision of a EE-SX671 photo sensor as a home switch by using piezo actuator driven linear stages and capacitance probe.

• 전기학회논문지
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• 제65권11호
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• pp.1907-1912
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• 2016

In fact, in order to obtain good performances and low torque ripple, a high-resolution sensor is needed, which is costly and usually needs a special construction for the machine. So researchers are becoming aware of their cost and are exploring the possibility of cost reduction. Information of rotor position is necessary to drive Linear Switched Reluctance Motor(LSRM). Therefore, linear optical encoder is used to detect a mover position. Normally, since the price of encoder, which is used for linear motor is relatively higher than the one used for rotory motor and the cost of additional equipment increases with the length of motor. This is not always appropriate, considering economical efficiency in case of using the linear optical encoder. As a results, LSRM has a great part for the total cost. Therefore, in this paper, we propose LSRM position detecting modeling with reflective type photo-sensor. Additionally, we have investigated the possibility of the reduced position sensor for LSRM drives with advanced control technique. To certify the overall characteristics of the proposed method, a simulation using PSIM software has been carried out and the informative results are displayed.

• Journal of Mechanical Science and Technology
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• 제15권10호
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• pp.1369-1379
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• 2001

This paper focuses on a development of a sensor system measuring locations of a vehicle to localize a mobile robot while it tracks on the track (location sensor) . Also it focuses on a system configuration identifying the vehicle's orientation and distance from the object while it is stationary at certain station (position sensor) . As for the location sensor it consists of a set of sensors with a combined guiding and counting sensor, and an address-coded sensor to localize the vehicle while moving on the rail. For the position sensor a PSD (Position Sensitive Device) sensor with photo-switches sensor to measure the offset and orientation of the vehicle at each station is introduced. Both sensor systems are integrated with a microprocessor as a data relay to the main computer controlling the vehicle. The location sensor system is developed and its performance for a mobile robot is verified by experiments. The position measuring system is proposed and is robust to the environmental variation. Moreover, the two kinds of sensor systems guarantee a low cost application and high reliability.

• 대한공간정보학회지
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• 제25권2호
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• pp.21-29
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• 2017

최근 활발히 연구가 진행 중인 자율주행차량이나 첨단운전자보조시스템의 효율적이고 안정적인 동작을 위해서 차량 위치를 정확하게 결정하는 것이 중요하다. 주로 사용되는 위성 기반 항법은 신호 수신이 어려운 영역에서 위치 정확도가 매우 떨어지는 한계가 있다. 이를 극복하기 위해 INS 등 추가센서를 이용하는 방안이 모색되고 있지만 높은 비용이 문제가 된다. 이에 본 연구는 고가의 센서를 추가하지 않고 차량에 이미 내장된 센서와 저가의 영상센서를 통합하여 차량의 위치를 정확하게 추정하는 알고리즘을 개발하였다. 차량 내장 센서로부터 제공되는 속력, 각속도와 단영상후방교차법로 결정된 카메라의 위치, 자세를 함께 활용하여 차량의 위치를 추정하였다. 알고리즘의 성능평가를 위해 시범 시스템을 구축하였고, 시험 데이터를 취득하여 주행경로를 추정하였다. 차량 내장 센서만을 이용하였을 경우에 비해 단영상후방교차법 결과를 함께 이용하였을 경우 약 40% 높은 정확도로 차량 경로추정이 가능하였다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2002년도 추계학술대회 논문집
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• pp.515-520
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• 2002

Automatic Transfer Crane is needed for automation of container terminal. It requires the control capability of exact position for loading/unloading job in yard. But it has the limitation of improvement because it has the operational environmental and its structural problems. It has the positioning errors caused by the deformation of rail, yawing motion of crane, wear of wheel, sliding motion between wheel and rail and so on. This study shows the calibration method of crane position by using the primitivity sensor and calibrating plate fixed on the ground.

• 센서학회지
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• 제11권6호
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• pp.365-370
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• 2002

교류 220V에 의해 동작하는 점핑링 장치를 제작하고 광센서를 사용하여 링의 높이정보를 받아 부상한 링의 높이를 실시간으로 검출하고 교육적 효과를 높이기 위해 디지털 높이정보를 아날로그 변환하여 쉽게 높이를 알 수 있도록 하였다. 교육용 시스템을 직접 제작하여 시스템을 모형화하여 제어신호를 구하고 제어 프로그램에 의해 원하는 높이로 링을 부상할 수 있도록 하였다. 본 논문은 광센서를 사용하여 링의 위치를 실시간으로 검출하였고 광센서의 배열과 높이 정보를 발광다이오드 5개로 디지털 값을 보여주었고, D/A변환하여 교육용 시스템을 제작하여 A/D 변환기를 통해 데이터 신호처리 하였다. 교육용 시스템을 모형 화하여 원하는 링의 높이를 실시간으로 제어 할 수 있게 하였다.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1995년도 추계학술대회
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• pp.18-21
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• 1995

When we inject drugstuffs to a patient for a long time, it is important to control proper injection amount and flow rate. Since inproper injection amount and a flow rate would cause bad a recovery a patient, the relience of sensors which detect injection amount is an important factor for whole injection systems' performance. In this research, we've compared the suitability of three sensors for injection pump monitoring system. The three types of sensors, piezo film sensor, photo transistor made up with three transmitting photodiodes and receving photodiode, and photo array, were selected for comparing. Using suggested data processing technique and photo amy sensors, we could minimize the effect of interference, disturbance, illumanation change, and sensitivity change caused by sensor's position. According to the experiments, the photo amy showed the higher reliance than any other the three types of sensors. The developed systems could be the foundation of beginning home production of infusion pump system and available for the base model of whole monitoring and control systems.

• Bulletin of the Korean Chemical Society
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• 제34권1호
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• pp.63-67
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• 2013

A bottom-modified (4-position) naphthalimide derivative 1 with 1,8-naphthyridine as binding site has been designed and synthesized. Compound 1 is the first 1,8-naphthyridine-modified naphthalimide-based sensor that can detect $Hg^{2+}$ selectively with respect to ratiometric fluorescent change and blue shift in organic aqueous solution. The Job's plot and FAB mass indicate that 1 formed a 1:1 complex with $Hg^{2+}$. A top-modified naphthalimide derivative 2 with 1,8-naphthyridin as binding site has also been synthesized for comparison.