教師著作

Permanent URI for this collectionhttp://rportal.lib.ntnu.edu.tw/handle/20.500.12235/31268

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Now showing 1 - 8 of 8

Design and Implementation of FPGA-Based Landslide Detection and Real-Time Monitoring System
(2011-11-27) C.-P. Tsai; W.-Y. Wang; M.-C. Lu; Y.-H. Chien; S.-F. Su
Fuzzy measure based mobile robot controller for autonomous movement control
(2011-06-10) G.-Y. Pan; C.-P. Tsai; M.-C. Chen; W.-Y. Wang; C.-R. Tsai
This paper proposes a novel fuzzy measure based mobile robot controller design method. We apply this method in a simulation where the movement of a mobile robot along a wall is governed by this controller. The ultrasonic range finder sensors onboard the mobile robot are used to measure the distance between the robot and the wall. The measurement results are recorded as fuzzy measure inputs and the results of the fuzzy measure are used to control the movement of the mobile robot along the wall. Our simulations compare the movements of the mobile robot with and without the fuzzy measure controller. The simulation results show that the mobile robot using the fuzzy measure controller exhibits a more controlled movement behavior than that using a controller without fuzzy measure.
An Image-Based Area Measurement System
(2011-06-10) C.-T. Chuang; C.-P. Tsai; M.-C. Lu; W.-Y. Wang; Y.-H. Chien
A novel image-based area measurement system is proposed in this paper, we can convert the pixels of object into real area by image processes. No matter the system is vertical to the measuring plane or not and the height of system, it could calculates arbitrary two points on the image convert into the actual distance. This paper proposed a new structure for achieve our goal, there are four laser projects and camera fixed on same base, then generate four laser spots on the object or measurement plant, and assume connect each two laser spots as parallel lines, finally it could simulated a ruler in the image. Without consider photography angle for this system, it can measure area of floor or height of building.
Image-Based Landslide Monitoring System
(2011-06-10) M.-C. Lu; T.-Y. Tang; C.-P. Tsai; W.-Y. Wang; I-H. Li
a novel image-based landslide monitoring system proposed in this paper, which is using digital image processes methods to detect landslide occurred in any landslide occurred situation to achieve a non-contact landslide monitoring system by one image. The theory of this system is based on using a laser projector to project a laser beam to measurement box, which have two acrylic boards in the measurement box. When landslide occurred, the laser beam will generate two laser spots in image. To identify the coordinate of laser spots through an easy calculation, the system could get the landslide displacement and offset angle. According the measurement result, it could announce the warning and prevent the damage.
A method of distance measurement by digital camera
(2006-11-11) T.-H. Wang; C.-C. Hsu; C.-P. Tsai; M.-C. Lu; W.-Y. Wang; C.-C. Chen
Nighttime Vehicle Distance Alarm System
(2007-08-26) M.-C. Lu; W.-Y. Wang; C.-C. Chen; C.-P. Tsai
Keeping safe distance between two cars is an important topic for car accident prevention. This paper presents a practical nighttime vehicle distance measuring method based on a single CCD image. The method combines the image-based distance measuring system (IBDMS) with nighttime vehicle distance alarm system. To solve the nighttime feature extraction problem, the proposed method uses two taillights as the feature. Based on the proportionality of similar triangles, distance between a CCD camera and taillight of the vehicle ahead can be measured. The method focuses on detecting taillight and differentiating the targeted vehicle from others on the basis of partial image analysis instead of whole image processing. As a result, high-speed processing and simple configuration of the proposed method have been achieved as demonstrated in this paper.
A Practical Nighttime Vehicle Distance Alarm System
(2008-10-15) M.-C. Lu; C.-P. Tsai; W.-Y. Wang; M.-C. Chen; C.-C. Hsu; Y. Y. Lu
This paper presents a practical nighttime vehicle distance measuring method based on a single CCD image. The method combines an image-based distance measuring system. To solve the nighttime feature extraction problem, the proposed method uses two taillights as the feature. Based on the proportionality of similar triangles, distance between a CCD camera and the taillights of the vehicle ahead can be measured. The method focuses on detecting the taillights and differentiating the targeted vehicle from others on the basis of partial image analysis instead of whole image processing. The system is both fast and simple. The accuracy of the proposed method is demonstrated in this paper through experiences.
A single CCD measuring method for threedimensional rectangular objects
(2012-07-02) T.-W. Lai; I-H. Li; C.-P. Tsai; W.-Y. Wang; M.-C. Lu
In this paper, a measuring system using IBDMS and PLDMS method through a CCD camera is proposed. The proposed measuring system is an easy-to-construct system to measure the three-dimensional rectangular objects by using a single CCD camera. In our proposed measuring system, the ruler for the measured objects can easily be efined by two laser points for a far distance or by a know-size and easy-to-get paper money for a near distance. For the far distance, the corrosion surface objects can be measured by ready lasers system. Otherwise, when the measured object stays in the near distance, an easy-to-get paper money can be used. Based on the known parameters, the proposed measurement can release the limitations of the photography angle. After measuring threedimensional information, we can further to compute the volume of rectangular objects.