• Journal of Mechanical Science and Technology
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• 제16권10호
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• pp.1222-1228
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• 2002

This research is the development of a flexible tactile sensor array for service robots using PVDF (polyvinylidene fluoride) film for the detection of a contact state in real time. The prototype of the tactile sensor which has 8${\times}$8 array using PVDF film was fabricated. In the fabrication procedure, the electrode patterns and the common electrode of the thin conductive tape were attached to both sides of the 281$\mu\textrm{m}$ thickness PVDF film using conductive adhesive. The sensor was covered with polyester film for insulation and attached to the rubber base for a stable structure. The proposed fabrication method is simple and easy to make the sensor. The sensor has the advantages in the implementing for practical applications because its structure is flexible and the shape of the each tactile element can be designed arbitrarily. The signals of a contact force to the tactile sensor were sensed and processed in the DSP system in which the signals are digitized and filtered. Finally, the signals were integrated for taking the force profile. The processed signals of the output of the sensor were visualized in a personal computer, and the shape and force distribution of the contact object were obtained. The reasonable performance for the detection of the contact state was verified through the sensing examples.

• Tribology and Lubricants
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• 제29권3호
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• pp.167-170
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• 2013

The friction behavior of human skin is determined by the complex interplay of the material and surface properties of the skin, as well as the contacting material, and strongly depends on the contact parameters (e.g., pressure and sliding velocity) and the presence of substances such as water, sweat, or skin surface lipids at the interface. Including a study on the effect of a surface's physical roughness for skin sliding over the surface, various studies have been conducted to understand human tactile sensibility. However, to investigate products in relation to human tactile sensibility, more objective research is needed. This study performed sliding experiments between the skin and the surfaces of phone cases to understand how the texture, friction, and stick-slip characteristics are related. Eight phone case surfaces with different topologies and chemical (or mechanical) compatibilities with skin were prepared and tested multiple times.

• 제어로봇시스템학회논문지
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• 제18권3호
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• pp.188-192
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• 2012

In this study, a carbon nanotube (CNT) flexible strain sensor was fabricated with CNT based epoxy and rubber composites for tactile sensing. The flexible strain sensor can be fabricated as a long fibrous sensor and it also may be able to measure large deformation and contact information on a structure. The long and flexible sensor can be considered to be a continuous sensor like a dendrite of a neuron in the human body and we named the sensor as a biomimetic artificial neuron. For the application of the neuron in biomimetic engineering, an ANMS (Artificial Neuron Matrix System) was developed by means of the array of the neurons with a signal processing system. Moreover, a strain positioning algorithm was also developed to find localized tactile information of the ANMS with Labview for the application of an artificial e-skin.

• 감성과학
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• 제24권3호
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• pp.41-60
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• 2021

본 연구는 제품과 물리적 접촉이 불가능한 온라인 환경에서 다중 감각 단서가 소비자의 촉각적 심상과 제품에 대한 태도 및 구매 의사에 미치는 영향을 알아보고자 하였다. 실험 1에서는 참가자들을 음향 없이 사진만 제시한 조건, 음향 없이 영상만 제시한 조건, 일치하는 음향과 영상을 제시한 조건, 불일치하는 음향과 영상을 제시한 조건으로 나누어 제품을 탐색하게 하였고 그 후 촉각적 심상선명도, 제품 사용의 상상용이성, 제품에 대한 태도-구매 의사를 측정하였다. 그 결과, 모든 변수에서 불일치하는 음향과 영상이 주어진 조건이 가장 낮은 평균 점수를 보였다. 실험 2는 참가자 내 디자인으로 설계되어, 참가자들에게 동일한 제품을 실험 1과 같은 네 개의 조건에서 탐색하게 하였다. 탐색 후, 촉각적 심상선명도, 제품 사용의 상상용이성, 제품에 대한 태도-구매 의사, 접촉 욕구 등을 측정하였다. 접촉 욕구를 공변인으로 하는 반복측정 공분산분석 결과, 일치하는 음향과 영상을 제시한 조건은 다른 조건과 비교했을 때 유의미하게 심상선명도, 제품에 대한 태도, 제품 구매 의사가 높았다. 이중 매개 분석 결과, 다중 감각 단서 조건은 심상선명도와 제품 사용의 상상용이성을 순차적으로 매개하여 제품에 대한 태도-구매 의사를 유의미하게 예측했다. 결론적으로, 음향 및 영상 단서로 유발된 선명한 촉각적 심상은 소비자가 제품을 사용하는 상황의 상상을 쉽게 만들어 태도-구매 의사와 같은 의사 결정에 긍정적 영향을 미칠 수 있다.

• 동의생리병리학회지
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• 제19권2호
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• pp.536-543
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• 2005

We statistically analyzed the relationship between the constitution and the refineness and tactile of skin depending on sex and age, using 1079 clinical data registered to SCIB(Sasang constitution Information Bank), and the following results are obtained: The thickness of skin has big discrimination ability in classification of Taeeumin and Soyangin, especially in women and in ages 21 or more. The stiffness of skin also has big discrimination ability in classification of Taeeumin and Soeumin, especially in Taeumin women and Soeumin man and in ages 21-60. The differences stated above have been proved to be meaningful enough by Chi-square test.

• 대한의용생체공학회:의공학회지
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• 제12권2호
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• pp.107-112
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• 1991

In this paper, we have developed page level input system of the character reading aid for the blind. Input toys)ems arse consisted with 512 pixels line image sensor, optical lento, digital interface for the computer and its control software. Input buffer size of the computer memory that for the single scanning of printed matters Image is 64kB. Image patterns of the reading characters which stored in system memory are converted to tactile character patterns that would be output to the bimorph tactile sensor by software control.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1988년도 한국자동제어학술회의논문집(국내학술편); 한국전력공사연수원, 서울; 21-22 Oct. 1988
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• pp.422-427
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• 1988

The purpose of this research is to develope a algorithm characterizing the grasp of the randomly fed objects using the tactile sensor. The tactile sensor used is composed of the 10 x 16 arrays of optical sensors and the planar resolution is 1.8 x 1.8 mm$^{2}$. The square and circular plate are used for the investigation of the characteristics of this sensor. The result shows that the measuring performance of the square plate is superior to that of the circular plate. Based upon this result the algorithm for the assembly of the electric plug was developed and was implemented using the mini-robot.

• 감성과학
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• 제2권1호
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• pp.105-111
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• 1999

In order to introduce the touch to engineering and industries, it must be preceded to dstablish a quantitative barometer of the feeling. for this purpose, we developed a tactile measuring system to measure physical properties of texture, such as surface roughness, friction coefficient and compliance. The tactile measuring system uses a LASER type displacement sensor, which is a non-contacting system, in measuring the surface roughness. By considering that human tactile system is a contacting mechanism, this non-contacting method needs to be modified. As a precedent research of that, we compared the contacting and non-contacting method in this paper. Surface roughness of ten cloths were measured by using the measuring system, then compared to the test results using the Kawabata evaluation system(KES), which uses a contacting method in measuring the surface roughness.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.61.4-61
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• 2001

This research is the development of a distributed flexible tactile sensor for service robots using PVDF (polyvinylidene fluoride) film for the detection of the contact state in real time. The tactile sensor which has 8$\times$8 taxels is fabricated using PVDF film and flexible circuitry. The proposed fabrication method is simple and easy to make the sensor in the laboratory without using any special equipment. Experimental results on static and dynamic properties are obtained. In order to investigate the properties of the sensor, the sensor output to the arbitrary forces and frequencies are measured using the shaker with the force sensor.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2014년도 제50차 하계학술대회논문집 22권2호
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• pp.53-54
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• 2014

본 논문에서는 시각 장애인들을 위해 유용한 정보를 제공해 주기 위한 촉각표시장치의 효율적인 정보 표시 방법에 대해 제안한다. 이 방법은 전방에 장애물이 있을 경우 이를 인지 및 촉각 정보로 변환하여 제공함으로 인해 사고를 미연에 예방하고자 한다. 이 방법은 저가의 스테레오 카메라를 이용하여 경제적인 비용으로 구성이 가능하다.