Papers by Keyword: Tactile

Abstract: A pressure-sensitive tactile sensor is with simple structure, well tolerated material and reliable to meet a variety of applications, particularly easy to realize the structure of the finger sensor that has a biomimetic properties. The characteristics of information collection, and the corresponding supporting technology on tactile reproduction has researched, in order to make the operator aware of the effective electric haptic, and does not appear tinglin. In addition to control the dynamic range of stimulating current, also the waveform, frequency and complete telepresence grasp process are studied.

Abstract: In current production metrology contour and roughness of work pieces has to be controlled in demanding small tolerances. It is important that the results not only have to be accurate, but also the measurement has to be performed effective and fast. It would be convenient to have the possibility measuring first a continuous surface profile and than performing different evaluations on adjacent segments. We describe a measurement system which is based on a tactile probe with a diamond tip. The position of each axis is measured by high resolution and high accuracy digital scales. The instrument is calibrated and traced back by only using one precision sphere covering approximately the whole measuring range of 24 mm. It is shown that with only that macroscopic calibration and adjustment the accuracy for roughness measurement in all arbitrary vertical positions is reached in the nm-range. The calibration and adjustment process is described and we show the verification of the accuracy by measuring several surface specimens. The results are compared to a Physikalisch-Technische Bundesanstalt (PTB) calibration certificates for those surface roughness standards.

Abstract: The paper deals with the problematic of contact comfort as a part of body conscious design/ human-centred design. Contact comfort consist of a combination of balanced surface temperature, heat transmission, surface roughness, surface elasticity/hardness, sorption activity of the surface in terms of vapour/fluids absorbance, sorption activity of the surface in terms of absorbing the external moisture (e.g. sweat or humidity of air/its condensates), having control over body position, possibilities of maintenance and visual comfort connected with cultural background of users, individual mental and physical setting that is creating overall feeling of comfort. All these parameters are measurable and it is possible to optimize them with an aim to get good solutions that are providing higher contact comfort.Roughness is extremely important for overall feeling of contact comfort it has direct relation also to the other features. The current paper presents also the methodology and results of the pilot study of contact comfort. .Different wood based materials and wood species with different types of surface finishing in comparison with other materials were investigated by using a test chair.

Abstract: The most important situation of textile companies is to design products which much more meeting the consumers feeling. In this paper, 4 kinds of silk fabrics were taken as the objects, 4 physiological targets were used such as electromyography (EMG), skin resistance (SC), skin temperature (ST), and respiration (Resp) from tactile and visual cognition. The aim of this research is to find out the physiological evidence of consumers in tactile and visual for textile. As the result shown that, accompanied by touch and watch, skin resistance and electromyography have obvious regularity undulation, and there were large discrepancy in each objects, however, skin temperature and respiration had little correlation. In a word, physiological indicators can be used as silk fabrics cognitive quantitative evaluation basis in tactile and visual more intuitively and conveniently.

Abstract: Through analyzing height character of the coal mining machine, the method of height control of the coal mining machine based on touch sensing technology of magneto-rheological valve is proposed. The controller exports control signal based on extracting current and speed signals of shearer cutting motor and controls touch sensing force feedback based on magneto-rheological valve. The operator can accurate and duly adjust roller height of the coal mining machine. The result of simulations and experiments show that the method is important to avoid the coal mining machine cutting the roof and floor rock and maintain the roof and floor of the formation face, and extend machine life, improve equipment reliability, protect worker safety, improve coal quality. This structure of control method is simple and easy to achieve which has a certain application foreground.

Abstract: Analysis into the effects of parametric characteristics of visual aid on the perception level of information transmitted has led to the possibility of examining and determining the quality of the reading level as a function of certain parameters of a digital apparatus (sensor), the distance to the text, the size of letters and the intensity of light. Efforts have been made to evaluate the effect of the specifications of the executor as well as the information transfer (by tactile way) speed onto the sensory organs of the disabled person at the perception level. A choice has been made of rational information transfer speeds and appropriate visual aid characteristics to facilitate an adequate perception level.