• 한국컴퓨터정보학회논문지
• /
• 제21권11호
• /
• pp.59-64
• /
• 2016

In this paper, we design and implement an Application based on android platform, which can control arduino Prime Smart Car using Bluetooth communication. This Application consist of Bluetooth communication module, manual mode module, and line-tracer mode module. In the Bluetooth communication module, it checks the on/off status of Smartphone Bluetooth. If Bluetooth status is off, it activates Bluetooth, selects the corresponding device from Bluetooth device list, and connects with a pair. In order to reduce coding time, we implements Bluetooth communication using inherited class from android Bluetooth package. In the manual mode module, it implements six direction moving button and stop button, which can control arduino Prime Smart Car. In the line-tracer mode module, it implements Prime Smart Car with self-driving function using TCRT5000 sensor. And moving button and stop button is disabled.

• International Journal of Railway
• /
• 제2권4호
• /
• pp.180-186
• /
• 2009

High speed railway challenge the design, construction and maintaining of traditional railway, many traditional design concepts have been changed. Transition of railway and bridge has two main problems. one is that different lines have different ability of resisting distortion in area of trial load, which was known that problem of smooth transition of stiffness, the other is that differential settlement between artificial structure and earth structure cause bending of railway. The two problems have effect on train moving. The principle of processing transition of railway and bridge is same in world, but it is difficult to find relationship between design standard of transition, vehicle performance, line standard, design speed and so on form documentation and data reports. Based on mechanics, the paper analyzed dynamic performance of transition of high speed railway, studied various rough elements which is effective to train moving, built mathematical model of interaction of train and transition of high speed railway and developed numerical simulation software. In various different work conditions, we did great quantity of numerical simulation, comprehensive analysis and performance analysis.

• 대한수학회논문집
• /
• 제34권1호
• /
• pp.333-349
• /
• 2019

The paper study the curvature theory of a line-trajectory of constant Disteli-axis, according to the invariants of the axodes of moving body in spatial motion. A necessary and sufficient condition for a line-trajectory to be a constant Disteli-axis is derived. From which new proofs of the Disteli's formulae and concise explicit expressions of the inflection line congruence are directly obtained. The obtained explicit equations degenerate into a quadratic form, which can easily give a clear insight into the geometric properties of a line-trajectory of constant Disteli-axis with the theory of line congruence. The degenerated cases of the Burmester lines are discussed according to dual points having specific trajectories.

• 인지과학
• /
• 제20권4호
• /
• pp.573-601
• /
• 2009

이 연구에서는 McConkie와 Rayner(1975)에서 소개된 움직이는-창(moving-window) 방법으로 우리글 읽기에서 지각 폭, 즉 한 고정에서 유용한 정보가 추출되는 범위에 대해 알아보았다. 실험 1에서는 창의 크기를 좌우 대칭인 3, 5, 7, 9, 11, 13, 15자로 조작하여 창이 없는 통제 조건과 수행을 비교했다. 분당 읽을 수 있는 어절의 수(읽기율)를 비교했을 때는 15자 조건은 통제 조건과 수행차이가 없었으나, 나머지 다른 조건들은 통제 조건보다 수행이 저조했다. 고정의 수에서는 15자 조건과 통제 조건은 차이가 없었고, 13자 조건은 통제 조건보다 고정의 수가 많은 경향을 보였고, 다른 조건들은 통제 조건보다 많았다. 빈칸을 한 자로 취급한 글자 도약 거리에서는 결과는 읽기율에서와 같았고, 화소에 기초한 화소 도약 거리에서는 결과 양상이 고정의 수에서와 동일했다. 고정시간에서도 다른 결과들과 비슷했는데, 15자, 13자 및 11자 조건들은 차이가 없었고, 9자 조건들은 통제 조건보다 짧은 경향을 보였으며, 나머지 다른 조건들은 통제 조건보다 대체로 짧았다. 실험 2에서는 지각 폭의 비대칭성을 알아보기 위해 고정 좌측의 창 크기를 0, 1, 2, 3, 4자로 조작하였다. 그 결과, 읽기율, 고정 수, 고정 시간 등에서 1자 조건만 통제 조건과 차이가 나타났고 도약 거리는 조건별로 차이가 나지 않았다. 이 연구에서는 우리글 읽기에서 처음으로 지각 폭의 크기를 여러 지표에서 나타나는 왼쪽으로 1자, 오른쪽으로 6-7자로 추정했다.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2003년도 추계학술대회 논문집(III)
• /
• pp.574-580
• /
• 2003

This research heightens use efficiency of existent train railroad equipment by maximum through communication based train control system, and because system that take advantage of new skill compares with safety of old signal system same or it that show that is high be. Examined MBS Embodiment method of most suitable by presenting calculation that find out location of train that this treatise runs free curved line department to embody MBS(Moving Block System) through communication

• 한국디자인학회:학술대회논문집
• /
• 한국디자인학회 2003년도 봄 학술발표대회논문집
• /
• pp.214-215
• /
• 2003

• 한국정밀공학회지
• /
• 제15권5호
• /
• pp.93-99
• /
• 1998

Although laser interferometer measurement system has advantages of measurement range and accuracy, it has some disadvantages when measurement of multi degrees of freedom of motion are required. Because the traditional error measurement methods for geometric errors (two straightness and three angular errors) of a slide of machine tools measures error components one at a time. It may also create an optical path difference and affect the measurement accuracy. In order to identify and compensate for geometric errors of a moving rigid body in real time processes, an on-line error measurement system for simultaneous detection of the five error components of a moving object is required. Using laser alignment technique and some optoelectronic components, an on-line measurement system with 5 degrees of freedom was developed for the geometric error detection in this study Performance verification of the system has been performed on an error generating mechanism. Experimental results show the feasibility of this system for identifying geometric errors of a slide of machine tools.

• 한국소음진동공학회논문집
• /
• 제21권10호
• /
• pp.951-959
• /
• 2011

In this study, an OTM(on-the-move) antenna which is mounted on ground vehicles and is used for mobile communication between vehicle and satellite while moving was addressed. Since LOS(line-of-sight) of antenna should direct satellite consistently while vehicle moving to guarantee high satellite communication quality, active antenna LOS stabilization is a core technology for OTM antenna. Stabilization of a satellite tracking antenna which consists of 2-DOF gimbals, an elevation gimbal over an azimuth gimbal, was considered in this study. In consideration of driving mechanism which consists of gear train and flexible driving shafts, a two-mass-system dynamic model coupled with vehicle motion was presented. An internal PI-control loop + outer PI-control loop structure has been suggested in order to damp the torsional vibration and stabilize control system. The classical pole-placement method was applied to design control gains. In addition, a vehicle motion compensation control beside of the feedback control loop has been suggested to improve LOS stabilization performances. The feasibility of the proposed control design was verified along with some experimental results.

• 한국항만학회지
• /
• 제13권2호
• /
• pp.303-312
• /
• 1999

The automated gate operating system is developed in this paper that controls the information of container at gate in the ACT. This system can be divided into three parts and consists of container identifier recognition car plate recognition container deformation perception. We linked each system and organized efficient gate operating system. To recognize container identifier the preprocess using LSPRD(Line Scan Proper Region Detection)is performed and the identifier is recognized by using neural network MBP When car plate is recognized only car image is extracted by using color information of car and hough transform. In the port of container deformation perception firstly background is removed by using moving window. Secondly edge is detected from the image removed characters on the surface of container deformation perception firstly background is removed by using moving window. Secondly edge is detected from the image removed characters on the surface of container. Thirdly edge is fitted into line segment so that container deformation is perceived. As a results of the experiment with this algorithm superior rate of identifier recognition is shown and the car plate recognition system and container deformation perception that are applied in real-time are developed.

• Smart Structures and Systems
• /
• 제24권5호
• /
• pp.617-630
• /
• 2019

Currently most of the vision-based structural identification research focus either on structural input (vehicle location) estimation or on structural output (structural displacement and strain responses) estimation. The structural condition assessment at global level just with the vision-based structural output cannot give a normalized response irrespective of the type and/or load configurations of the vehicles. Combining the vision-based structural input and the structural output from non-contact sensors overcomes the disadvantage given above, while reducing cost, time, labor force including cable wiring work. In conventional traffic monitoring, sometimes traffic closure is essential for bridge structures, which may cause other severe problems such as traffic jams and accidents. In this study, a completely non-contact structural identification system is proposed, and the system mainly targets the identification of bridge unit influence line (UIL) under operational traffic. Both the structural input (vehicle location information) and output (displacement responses) are obtained by only using cameras and computer vision techniques. Multiple cameras are synchronized by audio signal pattern recognition. The proposed system is verified with a laboratory experiment on a scaled bridge model under a small moving truck load and a field application on a footbridge on campus under a moving golf cart load. The UILs are successfully identified in both bridge cases. The pedestrian loads are also estimated with the extracted UIL and the predicted weights of pedestrians are observed to be in acceptable ranges.