Pub Date : 2019-08-29DOI: 10.1109/WHC.2019.8816119
G. C. Bettelani, A. Moscatelli, M. Bianchi
The mechanical interaction between the skin and the environment is important in shaping our knowledge of object properties. In addition, the response of cutaneous mechanoreceptors also contributes to our sense of limb position and motion. In previous papers, we demonstrated a striking motor error during self-paced hand movements over a ridged stationary surface, with the hand out of sight, which depended on the orientation of the ridges. Tactile feedback, combined with muscular-skeletal proprioception and the forward model of hand motion, produced a bias in the perceived hand displacement, which triggers a corrective motion in a direction towards the long axis of the ridges. Here, we found a similar effect when participants are required to slide over a rotating surface with ridges. Instead, in a control condition where participants were required to slide over a rotating smooth plate, they tend to deviate toward the same direction of the plate rotation. This is in agreement with our previous results, and well-explained by the fact that the bias induced by tactile feedback increases in absolute angular value during task execution, due to ridge rotation. We propose a Kalman filter to model the dynamic integration of touch and proprioception for the estimation of the perceived hand displacement.
{"title":"Contact with Sliding over a Rotating Ridged Surface: the Turntable Illusion","authors":"G. C. Bettelani, A. Moscatelli, M. Bianchi","doi":"10.1109/WHC.2019.8816119","DOIUrl":"https://doi.org/10.1109/WHC.2019.8816119","url":null,"abstract":"The mechanical interaction between the skin and the environment is important in shaping our knowledge of object properties. In addition, the response of cutaneous mechanoreceptors also contributes to our sense of limb position and motion. In previous papers, we demonstrated a striking motor error during self-paced hand movements over a ridged stationary surface, with the hand out of sight, which depended on the orientation of the ridges. Tactile feedback, combined with muscular-skeletal proprioception and the forward model of hand motion, produced a bias in the perceived hand displacement, which triggers a corrective motion in a direction towards the long axis of the ridges. Here, we found a similar effect when participants are required to slide over a rotating surface with ridges. Instead, in a control condition where participants were required to slide over a rotating smooth plate, they tend to deviate toward the same direction of the plate rotation. This is in agreement with our previous results, and well-explained by the fact that the bias induced by tactile feedback increases in absolute angular value during task execution, due to ridge rotation. We propose a Kalman filter to model the dynamic integration of touch and proprioception for the estimation of the perceived hand displacement.","PeriodicalId":6702,"journal":{"name":"2019 IEEE World Haptics Conference (WHC)","volume":"50 1","pages":"562-567"},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86189119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-07-09DOI: 10.1109/WHC.2019.8816077
Timothy Aveni, C. Seim, Thad Starner
Passive tactile learning (PTL) is a method of training motor skills using repeated tactile cues applied to the body even while the user is focused on unrelated tasks.Prior inquiry into PTL has determined that it may be used to teach a variety of input methods, including those that require simultaneous actions (chords) and spatial tasks that give individual fingers multiple responsibilities. No research has combined these techniques to construct a training system that teaches a spatial, chorded input method. Computer stenography is one such input method, and the need for improved training techniques for computer stenography is apparent. Many aspiring stenographers quickly lose motivation due to the difficulty of the input method and the scarcity of effective learning resources. Passive tactile training may be a useful training mechanism to combat the learning crisis in the stenography field. In a study with 12 participants, we demonstrate that PTL may be a useful aide to learning computer stenography. Despite the complexity of the input method, results suggest that PTL may be effective in teaching users fundamental building blocks of stenography that can be applied broadly to the task of mastering the input method.
{"title":"A preliminary apparatus and teaching structure for passive tactile training of stenography","authors":"Timothy Aveni, C. Seim, Thad Starner","doi":"10.1109/WHC.2019.8816077","DOIUrl":"https://doi.org/10.1109/WHC.2019.8816077","url":null,"abstract":"Passive tactile learning (PTL) is a method of training motor skills using repeated tactile cues applied to the body even while the user is focused on unrelated tasks.Prior inquiry into PTL has determined that it may be used to teach a variety of input methods, including those that require simultaneous actions (chords) and spatial tasks that give individual fingers multiple responsibilities. No research has combined these techniques to construct a training system that teaches a spatial, chorded input method. Computer stenography is one such input method, and the need for improved training techniques for computer stenography is apparent. Many aspiring stenographers quickly lose motivation due to the difficulty of the input method and the scarcity of effective learning resources. Passive tactile training may be a useful training mechanism to combat the learning crisis in the stenography field. In a study with 12 participants, we demonstrate that PTL may be a useful aide to learning computer stenography. Despite the complexity of the input method, results suggest that PTL may be effective in teaching users fundamental building blocks of stenography that can be applied broadly to the task of mastering the input method.","PeriodicalId":6702,"journal":{"name":"2019 IEEE World Haptics Conference (WHC)","volume":"28 1","pages":"383-388"},"PeriodicalIF":0.0,"publicationDate":"2019-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73934749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-07-09DOI: 10.1109/WHC.2019.8816123
Shun Suzuki, M. Fujiwara, Yasutoshi Makino, H. Shinoda
This paper attempts to verify that human subjects can move a hand along a virtual path produced by ultrasound without visual information. The path, from start to finish (the ‘goal’), is presented by switching ultrasound focal points. The movement of focal points produces vibrotactile stimuli on the hand, and users perceive it as a line. The users can move their hand to the goal by tracing this line. With our method, users actively trace the path, therefore no feedback of hand position is necessary. In the experiment, we verified that the participants can move their hand to the goal with a deviation of less than 50 mm. Also, the average deviation between the trajectory of the hand and a curved path is less than 40 mm. Thus, we concluded that users move their hand along the path while perceiving it.
{"title":"Midair Hand Guidance by an Ultrasound Virtual Handrail","authors":"Shun Suzuki, M. Fujiwara, Yasutoshi Makino, H. Shinoda","doi":"10.1109/WHC.2019.8816123","DOIUrl":"https://doi.org/10.1109/WHC.2019.8816123","url":null,"abstract":"This paper attempts to verify that human subjects can move a hand along a virtual path produced by ultrasound without visual information. The path, from start to finish (the ‘goal’), is presented by switching ultrasound focal points. The movement of focal points produces vibrotactile stimuli on the hand, and users perceive it as a line. The users can move their hand to the goal by tracing this line. With our method, users actively trace the path, therefore no feedback of hand position is necessary. In the experiment, we verified that the participants can move their hand to the goal with a deviation of less than 50 mm. Also, the average deviation between the trajectory of the hand and a curved path is less than 40 mm. Thus, we concluded that users move their hand along the path while perceiving it.","PeriodicalId":6702,"journal":{"name":"2019 IEEE World Haptics Conference (WHC)","volume":"8 1","pages":"271-276"},"PeriodicalIF":0.0,"publicationDate":"2019-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90846866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-07-09DOI: 10.1109/WHC.2019.8816166
Naghmeh Zamani, Heather Culbertson
Tactile sensation is essential for dentists in detecting and diagnosing teeth and tissues with a dental tool. Gloves can impair this sensation, but they are crucial for protecting both dentists and patients. We must better understand how gloves affect tactile acuity to design gloves that can retain a higher sensitivity. Thickness is one critical parameter of the glove design we are evaluating in this paper. Previous studies have evaluated the role of glove thickness on sensitivity, but not in a tool-mediated interaction. This study characterizes the force, torque, and vibrotactile perception thresholds for 15 participants holding a dental tool while wearing no gloves or gloves of three different thicknesses. We also measure vibration transmission through each glove to determine the level of damping provided by the different thicknesses. Our results show that the force and torque perceptual thresholds increase with increasing the glove thickness, but the vibration perceptual threshold is affected more by how the tool is held then by the gloves. However, the gloves do dampen the vibrations, and the amount of damping increases with thickness.
{"title":"Effects of Dental Glove Thickness on Tactile Perception Through a Tool","authors":"Naghmeh Zamani, Heather Culbertson","doi":"10.1109/WHC.2019.8816166","DOIUrl":"https://doi.org/10.1109/WHC.2019.8816166","url":null,"abstract":"Tactile sensation is essential for dentists in detecting and diagnosing teeth and tissues with a dental tool. Gloves can impair this sensation, but they are crucial for protecting both dentists and patients. We must better understand how gloves affect tactile acuity to design gloves that can retain a higher sensitivity. Thickness is one critical parameter of the glove design we are evaluating in this paper. Previous studies have evaluated the role of glove thickness on sensitivity, but not in a tool-mediated interaction. This study characterizes the force, torque, and vibrotactile perception thresholds for 15 participants holding a dental tool while wearing no gloves or gloves of three different thicknesses. We also measure vibration transmission through each glove to determine the level of damping provided by the different thicknesses. Our results show that the force and torque perceptual thresholds increase with increasing the glove thickness, but the vibration perceptual threshold is affected more by how the tool is held then by the gloves. However, the gloves do dampen the vibrations, and the amount of damping increases with thickness.","PeriodicalId":6702,"journal":{"name":"2019 IEEE World Haptics Conference (WHC)","volume":"10 1","pages":"187-192"},"PeriodicalIF":0.0,"publicationDate":"2019-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79213084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-07-09DOI: 10.1109/WHC.2019.8816084
Kyle T. Yoshida, Cara M. Nunez, Sophia R. Williams, A. Okamura, Ming Luo
Haptic devices worn on the forearm have the ability to provide communication while freeing the user’s hands for manipulation tasks. We introduce a multi-modal haptic device with a rigid rotational housing and three soft fiber-constrained linear pneumatic actuators. Soft pneumatic actuators are used because of their compliance, light weight, and simplicity, while rigid components provide robust and precise control. The soft pneumatic actuators provide linear horizontal and vertical movements, and the rigid housing, affixed to a motor, provides rotational movement of the tactor. The device can produce normal, shear, vibration, and torsion skin deformation cues by combining the movement of the soft pneumatic actuators with the rotational housing. The tactor is able to provide a shear force of up to 0.47 N and a normal force of up to 1.3 N. To elucidate the physical design principle and the actuation strategy, the static force and displacement of the soft tactor are modeled as a function of material, design parameters, and pressure. The models were validated experimentally.
{"title":"3-DoF Wearable, Pneumatic Haptic Device to Deliver Normal, Shear, Vibration, and Torsion Feedback","authors":"Kyle T. Yoshida, Cara M. Nunez, Sophia R. Williams, A. Okamura, Ming Luo","doi":"10.1109/WHC.2019.8816084","DOIUrl":"https://doi.org/10.1109/WHC.2019.8816084","url":null,"abstract":"Haptic devices worn on the forearm have the ability to provide communication while freeing the user’s hands for manipulation tasks. We introduce a multi-modal haptic device with a rigid rotational housing and three soft fiber-constrained linear pneumatic actuators. Soft pneumatic actuators are used because of their compliance, light weight, and simplicity, while rigid components provide robust and precise control. The soft pneumatic actuators provide linear horizontal and vertical movements, and the rigid housing, affixed to a motor, provides rotational movement of the tactor. The device can produce normal, shear, vibration, and torsion skin deformation cues by combining the movement of the soft pneumatic actuators with the rotational housing. The tactor is able to provide a shear force of up to 0.47 N and a normal force of up to 1.3 N. To elucidate the physical design principle and the actuation strategy, the static force and displacement of the soft tactor are modeled as a function of material, design parameters, and pressure. The models were validated experimentally.","PeriodicalId":6702,"journal":{"name":"2019 IEEE World Haptics Conference (WHC)","volume":"103 1 1","pages":"97-102"},"PeriodicalIF":0.0,"publicationDate":"2019-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78047408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-07-09DOI: 10.1109/WHC.2019.8816128
C. Loconsole, D. Leonardis, Massimiliano Gabardi, A. Frisoli
In this work, we present the design and development of BrailleCursor, a patent pending full-size Refreshable Braille Display featuring 40 Braille cells and based on an innovative method: it uses a single actuated cursor for refreshing Braille cells composed of passive pins. In particular, a single electromagnetic actuator, moved on a linear slider, is capable of refreshing a full row of passive pins: each pin consists in a simple metal cylinder and can be reconfigured in a low or high state by an external magnetic field. This solution disentagles the cost of the device from the number of Braille cells and pins. Finally, we experimentally evaluated the performance of the prototype, including embedded electronics and control interface, in terms of rendering errors with respect to the reference Braille characters. The technical features of our proposed method allow us to start to design and develop a dense matrix Refreshable Braille Display.
{"title":"BrailleCursor: an Innovative Refreshable Braille Display Based on a Single Sliding Actuator and Simple Passive Pins","authors":"C. Loconsole, D. Leonardis, Massimiliano Gabardi, A. Frisoli","doi":"10.1109/WHC.2019.8816128","DOIUrl":"https://doi.org/10.1109/WHC.2019.8816128","url":null,"abstract":"In this work, we present the design and development of BrailleCursor, a patent pending full-size Refreshable Braille Display featuring 40 Braille cells and based on an innovative method: it uses a single actuated cursor for refreshing Braille cells composed of passive pins. In particular, a single electromagnetic actuator, moved on a linear slider, is capable of refreshing a full row of passive pins: each pin consists in a simple metal cylinder and can be reconfigured in a low or high state by an external magnetic field. This solution disentagles the cost of the device from the number of Braille cells and pins. Finally, we experimentally evaluated the performance of the prototype, including embedded electronics and control interface, in terms of rendering errors with respect to the reference Braille characters. The technical features of our proposed method allow us to start to design and develop a dense matrix Refreshable Braille Display.","PeriodicalId":6702,"journal":{"name":"2019 IEEE World Haptics Conference (WHC)","volume":"20 1","pages":"139-144"},"PeriodicalIF":0.0,"publicationDate":"2019-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81694689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-07-09DOI: 10.1109/WHC.2019.8816083
Richa Gupta, P. Rao, M. Balakrishnan, S. Mannheimer
The design of tactile graphics for blind and visually impaired students generally adheres to standard design guidelines written before modern technologies, when producing "volumetric" (with variable heights) tactile diagrams was difficult. Thus, the perceptual-cognitive dynamics of volumetric tactile elements are not thoroughly understood. This work explores the use of volumetric elements for creating effective tactile graphics through several experiments conducted with individuals with blindness. The results indicate that variable heights can effectively and intuitively convey several kinds of information, particularly in quantitative diagrams, charts and maps with discrete, clearly contoured sections representing different numerical or spatial values.
{"title":"Evaluating the Use of Variable Height in Tactile Graphics","authors":"Richa Gupta, P. Rao, M. Balakrishnan, S. Mannheimer","doi":"10.1109/WHC.2019.8816083","DOIUrl":"https://doi.org/10.1109/WHC.2019.8816083","url":null,"abstract":"The design of tactile graphics for blind and visually impaired students generally adheres to standard design guidelines written before modern technologies, when producing \"volumetric\" (with variable heights) tactile diagrams was difficult. Thus, the perceptual-cognitive dynamics of volumetric tactile elements are not thoroughly understood. This work explores the use of volumetric elements for creating effective tactile graphics through several experiments conducted with individuals with blindness. The results indicate that variable heights can effectively and intuitively convey several kinds of information, particularly in quantitative diagrams, charts and maps with discrete, clearly contoured sections representing different numerical or spatial values.","PeriodicalId":6702,"journal":{"name":"2019 IEEE World Haptics Conference (WHC)","volume":"24 1","pages":"121-126"},"PeriodicalIF":0.0,"publicationDate":"2019-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74547576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-07-09DOI: 10.1109/WHC.2019.8816107
L. Pantera, Charles Hudin
Because vibrations propagate and reverberate, providing precise and distinct vibrotactile stimulation to multiple fingers in contact simultaneously with a touch surface is challenging. Previous research has demonstrated that it is possible to render localised multitouch feedback using piezoelectric actuators. This paper shows that a sparse array of piezoelectric actuators glued to the surface and driven by an inverse filtered signal can overcome those propagation effects and produce undistorted and independent vibrotactile stimuli. Different experiments have been conducted in order to prove that it is possible to realise localised multitouch in any point of a plate. Then an experiment have been realised in order to highlight the impact of the finger on the stimulation signal.
{"title":"Sparse Actuator Array Combined with Inverse Filter for Multitouch Vibrotactile Stimulation","authors":"L. Pantera, Charles Hudin","doi":"10.1109/WHC.2019.8816107","DOIUrl":"https://doi.org/10.1109/WHC.2019.8816107","url":null,"abstract":"Because vibrations propagate and reverberate, providing precise and distinct vibrotactile stimulation to multiple fingers in contact simultaneously with a touch surface is challenging. Previous research has demonstrated that it is possible to render localised multitouch feedback using piezoelectric actuators. This paper shows that a sparse array of piezoelectric actuators glued to the surface and driven by an inverse filtered signal can overcome those propagation effects and produce undistorted and independent vibrotactile stimuli. Different experiments have been conducted in order to prove that it is possible to realise localised multitouch in any point of a plate. Then an experiment have been realised in order to highlight the impact of the finger on the stimulation signal.","PeriodicalId":6702,"journal":{"name":"2019 IEEE World Haptics Conference (WHC)","volume":"34 1","pages":"19-24"},"PeriodicalIF":0.0,"publicationDate":"2019-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77696229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-07-09DOI: 10.1109/WHC.2019.8816087
Chiara Gaudeni, D. Prattichizzo
Restoring the sense of touch in robotic surgery is an emerging need several researchers tried to address. In this paper, we focused on the slave side proposing a pneumatic sensor to estimate contact forces occurring during the interaction between surgical instruments and anatomical areas. It consists of a tiny pneumatic balloon, which, after being inflated, appears near the tip of the instrument during the measurement phase only. This paper presents a mathematical method relating the intensity of the contact force to the variation of pressure inside the balloon. The latter was modeled as a spherical elastic membrane, whose behavior during contact was characterized taking into account both the deformation of the membrane and the compression of the contained gas. Geometrical considerations combined with an energetic approach allowed us to compute the force of interest. The effectiveness of our sensing device has been confirmed by experimental results, based on comparison with a high-performance commercial force sensor.
{"title":"A Mathematical Model of the Pneumatic Force Sensor for Robot-assisted Surgery","authors":"Chiara Gaudeni, D. Prattichizzo","doi":"10.1109/WHC.2019.8816087","DOIUrl":"https://doi.org/10.1109/WHC.2019.8816087","url":null,"abstract":"Restoring the sense of touch in robotic surgery is an emerging need several researchers tried to address. In this paper, we focused on the slave side proposing a pneumatic sensor to estimate contact forces occurring during the interaction between surgical instruments and anatomical areas. It consists of a tiny pneumatic balloon, which, after being inflated, appears near the tip of the instrument during the measurement phase only. This paper presents a mathematical method relating the intensity of the contact force to the variation of pressure inside the balloon. The latter was modeled as a spherical elastic membrane, whose behavior during contact was characterized taking into account both the deformation of the membrane and the compression of the contained gas. Geometrical considerations combined with an energetic approach allowed us to compute the force of interest. The effectiveness of our sensing device has been confirmed by experimental results, based on comparison with a high-performance commercial force sensor.","PeriodicalId":6702,"journal":{"name":"2019 IEEE World Haptics Conference (WHC)","volume":"24 1","pages":"598-603"},"PeriodicalIF":0.0,"publicationDate":"2019-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78873392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We previously developed a method for augmenting tactile sensation on the toepad. By presenting vibration to the toenail while the toepad contacts a surface, an illusory tactile sensation can be induced on the toepad. Importantly, this method does not require users to attach a rigid actuator to the sole. However, the illusory sensation is restricted to a limited area. In the current study, we tested a proposed method for extending the range of the illusory tactile sensation in the foot sole by applying vibration stimulation to the foot instep. In a preliminary experiment, we identified that stimulating the first and fifth metatarsal tips induced a tactile illusory sensation on the foot sole. In the first experiment, the probability of occurrence of tactile illusion was determined, and the effectiveness of our presentation method was confirmed. In the second experiment, we determined the load conditions under which the illusion occurs. The results suggested the feasibility of use during walking. Our findings indicated that the range of the illusory tactile sensation on the foot sole can be expanded by stimulating the first and fifth metatarsal tips in addition to the toenail.
{"title":"Enhancement of range of creation of foot sole tactile illusion by vibration stimulation of the foot instep*","authors":"Yutaro Iijima, Masayuki Uchida, Taku Hachisu, Yuki Hashimoto","doi":"10.1109/WHC.2019.8816154","DOIUrl":"https://doi.org/10.1109/WHC.2019.8816154","url":null,"abstract":"We previously developed a method for augmenting tactile sensation on the toepad. By presenting vibration to the toenail while the toepad contacts a surface, an illusory tactile sensation can be induced on the toepad. Importantly, this method does not require users to attach a rigid actuator to the sole. However, the illusory sensation is restricted to a limited area. In the current study, we tested a proposed method for extending the range of the illusory tactile sensation in the foot sole by applying vibration stimulation to the foot instep. In a preliminary experiment, we identified that stimulating the first and fifth metatarsal tips induced a tactile illusory sensation on the foot sole. In the first experiment, the probability of occurrence of tactile illusion was determined, and the effectiveness of our presentation method was confirmed. In the second experiment, we determined the load conditions under which the illusion occurs. The results suggested the feasibility of use during walking. Our findings indicated that the range of the illusory tactile sensation on the foot sole can be expanded by stimulating the first and fifth metatarsal tips in addition to the toenail.","PeriodicalId":6702,"journal":{"name":"2019 IEEE World Haptics Conference (WHC)","volume":"66 1","pages":"31-36"},"PeriodicalIF":0.0,"publicationDate":"2019-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84035265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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