A force sensor using strain gauges is widely used in many mechanical measuring systems. A method of measuring force and contact point using two gauges is available although it rather limited to extension of micro scal...
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In recent years, robot industries have developed many vacuuming cleaning robots employing coverage methods based on various algorithms such as genetic algorithm, neural networks, and spiral filling paths. However, the...
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In recent years, robot industries have developed many vacuuming cleaning robots employing coverage methods based on various algorithms such as genetic algorithm, neural networks, and spiral filling paths. However, there is not enough fair system to determine the excellence of different cleaning robots because most of the commercially available cleaning robots are separately evaluated by each observer in different experimental environments. Therefore, it is important to measure and compare the performances of different vacuuming cleaning robots under the same conditions (e.g., the same room size and operating time). This paper present a novel system for measuring the quantities such as the cleaning coverage areas of vacuum cleaning robots and the overall operating time until the cleaning coverage percentage is 90%. For this purpose, we build a test environment with IGPS and camera sensors. Also, in contrast with existing coverage evaluation methods, we employ the suction coverage models corresponding to suctions of specific cleaning robots for measuring the more accurate coverage area. As a consequence, we evaluate the performances of vacuum cleaning robots via our performance evaluation system.
In this paper, a new wearable input device recognizing human hand-motion, a keyglove, is proposed. The glove can resolve the disadvantages of the conventional input devices and can be adapted to the mobile computing e...
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ISBN:
(纸本)0780384636
In this paper, a new wearable input device recognizing human hand-motion, a keyglove, is proposed. The glove can resolve the disadvantages of the conventional input devices and can be adapted to the mobile computing environment The device is applicable as the touch-typing input method for users' easy understanding and improvement of input speed. The hand-motion for touch-typewriting using QWERTY keyboard, which is most widely being used currently, is analyzed. The analyzed results show that the model with 21 DOF can be reduced to one with approximately 14 DOF. The hand-motion capture module using low price sensors is also developed for hand-motion recognition. In general, however, typists using the keyglove system can not exactly determine the key position of desired input letter because the virtual keyboard does not have the physical location of key layouts, and that causes many typewriting errors at a long typewriting time. Therefore, an algorithm is needed to cope with the problem and to reduce typewriting errors due to personal disparities such as hand shapes and typewriting habits. For this reason, the time-variant prediction algorithm is proposed to minimize typewriting errors, and the possibility of the developed keyglove system is also verified.
Speech recognition based on only auditory information tends to be very susceptible to external noise. In this study, we investigated how visual information can be useful to improve speech recognition. We can guess a p...
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ISBN:
(纸本)9789604742608
Speech recognition based on only auditory information tends to be very susceptible to external noise. In this study, we investigated how visual information can be useful to improve speech recognition. We can guess a part of talking by an opponent from a shape of his/her mouth. Especially, information about vowels in opponent's talk is able to be sufficiently obtained from the lip shape. The information about an order of sequence of vowels which is found by analyzing the change of the lip shape can be used as an indicator to evaluate confidence for recognition based on an unclear voice. Using the longest common subsequence algorithm, comparison of the order of sequences of vowels resulted from the speech recognition based on voice and one from the lip reading based on version is helpful to improve confidence for the speech recognition. Studies to decrease error ratio of speech recognition allow magnifying application of a technique of speech recognition in a noisy environment.
A new precision parallel mechanism having actuation redundancy will be introduced in this paper. Physical contribution of the actuation redundancy for the precision parallel mechanism is reviewed. In addition, several...
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This paper describes an anthropomorphic robot hand and its experiments. The robot Hand is a very complicated system composed of a large number of joints. Also, there are limitations of size and weight in the developme...
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This paper is introduced a quadruped walking robot for transportation, developed by KITECH (Korea Institute of Industrial technology). This robot is composed of four legs, engine, power package and hydraulic rotary ac...
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This paper is introduced a quadruped walking robot for transportation, developed by KITECH (Korea Institute of Industrial technology). This robot is composed of four legs, engine, power package and hydraulic rotary actuators. It is installed an engine and small-size/high-power hydraulic rotary actuators for a quadruped robot to carry heavy loads and to move fast on uneven terrain. The size of this robot is 1.2m x 1m x 0.4m (height, length and width, respectively) and the degree of freedom is fifteen. Also it can carry over 100 kg totally including 60 kg payload. For this, it is developed a hydraulic rotary actuator that is light weight and compact size. The total control system comprises a main controller system, a hydraulic servo system and an engine/hydraulic power control system. And, in order to control balance, the kinematic model of quadruped robot is analyzed and the pattern generation method using the virtual model is applied.
As the physical sizes of many electrical devices and their components shrink to sometimes only a few microns, expanding dextrousness and obtaining rapidity of a precise micro-manipulation system become one of the majo...
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Hydraulic actuation has the advantage of substantial power and wide range of speed with a small size and low weight. Because of this advantage, hydraulic actuation is used often for a robot dealing with heavy-weight m...
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In this paper, a robust localization method for mobile robot based on the combination of Kalman filter and perturbation estimator is presented. It remarkably enhances the robustness of localization performance, specif...
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