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Foot-Based 6-DOF Haptic Interface with Force Feedback Capability for Third Arm Manipulation
Seigo Okada;Yasunao Okazaki;Yusuke Kato;Jun Ozawa;Takeshi Ando
2021 IEEE International Conference on Systems, Man, and Cybernetics (SMC)
Year: 2021 | Conference Paper |
In this paper, we propose a 6-DOF haptic interface with force feedback capability for foot-based interaction. To direct a "third arm" to any position that the operator wants to reach while both hands are busy, the controller needs 6-DOF input from a modality that does not rely on the hands. We focus on foot-based operation and propose a device that is composed of a parallel link and omni wheel. We...Show More
Assist Timing Decision Method for Wire Type Walking Assist Suit by Hip Joint Angular Acceleration
Junyuan Zhang;Hiroumi Murai;Akihito Ito;Nobutaka Tsujiuchi;Tsuyoshi Inoue;Kenta Murakami;Fumiya Hanzawa;Kazuaki Kishimoto;Jun Ozawa
2020 IEEE 9th Global Conference on Consumer Electronics (GCCE)
Year: 2020 | Conference Paper |
In this study, we proposed a method to determine the assist timing for wire type assist suit. In this method, since the assist timing is determined based on the hip joint angular acceleration by the IMU sensor, the assist can be performed at the optimal timing for each user. As a result of the experiment that in some trials, the maximum hip extension torque were reduced compared to normal walking ...Show More
Estimation model for lower extremity strength using gait movement measured with inertial sensor considering differences of sex and environment
2020 42nd Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC)
Year: 2020 | Conference Paper |
Cited by: Papers (1)
In this study, we propose a method for estimating lower extremity strength from daily gait movement. Gait movement is affected by sex and gait environment. Therefore, we examined correlation coefficient between lower extremity strength and gait movement based on sex and environment and created models for estimating lower extremity strength. As a result, when only male or female data were used for ...Show More
Lifestyle analysis with IoT data acquired from coffee roaster for service development
Masaaki Terano;Ayaka Kimura;Jun Ozawa;Yuri Nishikawa;Takeshi Takenaka;Fuko Oura
2019 IEEE International Conference on Consumer Electronics (ICCE)
Year: 2019 | Conference Paper |
This paper presents the lifestyle analyses of users via the appliance logs of our IoT coffee roasting service combined with a questionnaire survey on their lifestyles. We found that there is a difference in lifestyle trends between subscribed and non-subscribed users of the service. We also found that users showing a certain lifestyle have specific usage patterns of the roaster. In addition, we co...Show More
Mobility Optimization on Cyber Physical System via Multiple Object Tracking and Mathematical Programming
Nozomi Hata;Takashi Nakayama;Akira Tanaka;Takashi Wakamatsu;Akihiro Yoshida;Nariaki Tateiwa;Yuri Nishikawa;Jun Ozawa;Katsuki Fujisawa
2018 IEEE International Conference on Big Data (Big Data)
Year: 2018 | Conference Paper |
Cyber-Physical Systems (CPSs) are attracting significant attention from a number of industries, including social infrastructure, manufacturing, retail, among others. We can easily gather big datasets of people and transportation movements by utilizing camera and sensor technologies, and create new industrial applications by optimizing and simulating social mobility in the cyberspace. In this paper...Show More
OpenMP and GPGPU Implementations of Probabilistic Occupancy Map for Multiple Human Position Estimation
2018 IEEE International Conference on Systems, Man, and Cybernetics (SMC)
Year: 2018 | Conference Paper |
Probabilistic Occupancy Map (POM) is a method to estimate a location of multiple people, given images taken by multiple cameras from different angles set at a head level. It is useful even in the case of significant occlusion and can derive a location of people without an appearance model and prerequisite knowledge about the number of people in a detection space. However, the computation time of P...Show More
Multiple sports player tracking system based on graph optimization using low-cost cameras
2018 IEEE International Conference on Consumer Electronics (ICCE)
Year: 2018 | Conference Paper |
Cited by: Papers (8)
Multiplayer tracking is a key technology for strategic analysis in team sports. Since existing solutions use high-resolution cameras and are also expensive to install, they are primarily for professionals and there are almost no solutions that consumers can easily obtain. We focused on K-Shortest Paths which performs well with low-end cameras located at a tripod-level height, where occasional dete...Show More
Learning discriminative intention predictors for sit-to-stand assistance
Yuki Ishikura;Takamitsu Matsubara;Kenji Sugimoto;Yusuke Kato;Tsuyoshi Inoue;Jun Ozawa
2017 IEEE/SICE International Symposium on System Integration (SII)
Year: 2017 | Conference Paper |
Prediction of user motion intention is crucial for assistive robotics. Many previous studies have focused on only a single target motion. However, in practice, the user may also perform other motions. If a motion intention predictor constructed for the target motion is applied to other non-target motions, incorrect intention would be predicted and improper assistance might be provided to the user....Show More
Performance evaluation of multiple sports player tracking system based on graph optimization
2017 IEEE International Conference on Big Data (Big Data)
Year: 2017 | Conference Paper |
Cited by: Papers (4)
Multiplayer tracking is one of the essential technologies in team sports analysis, but there are few commercial solutions that consumers can quickly obtain and install. We focused on multiple object tracking method using graph optimization algorithm called K-Shortest Paths (KSP), which performs well with cameras located at a tripod-level height where occasional detection failure may occur. We eval...Show More
Soft hip walking assist experimental system featuring variable compliance control
Stephen W. John;Mayumi Komatsu;Kenta Murakami;Jun Ozawa;Masaki Yamamoto
2017 IEEE International Conference on Consumer Electronics (ICCE)
Year: 2017 | Conference Paper |
Cited by: Papers (1)
In this paper, we present a tethered soft assist experimental system for the hip, incorporating virtual compliant actuator model into the control system. We adjust the parameters of the virtual compliant actuator to generate assistance torques around the hip during walking. Experimental tests for level walking at 1.25 m/s shows that variable stiffness assist is capable of reducing the energy cost ...Show More
Prediction sit-to-stand movement using trunk angle and lower limb EMG for assist system
2017 IEEE International Conference on Consumer Electronics (ICCE)
Year: 2017 | Conference Paper |
Cited by: Papers (5)
In this study, we propose a method of prediction of sit-to-stand movement for an assist system. The proposed method enables the prediction of sit-to-stand movement before the buttocks leave the seat. To verify the accuracy of the proposed method, we conducted evaluation experiments on five subjects to determine whether the movement is sit-to-stand or another movement. The evaluation results showed...Show More
Monitoring of a driver's heart rate using a microwave sensor and template-matching algorithm
2017 IEEE International Conference on Consumer Electronics (ICCE)
Year: 2017 | Conference Paper |
Cited by: Papers (8)
A method of monitoring a driver's heart rate using a microwave sensor on a seat backrest is proposed. The heartbeat signal was learned as a template while the car engine idled. This template was used to calculate correlation between observed signals. The proposed method amplifies a weak heartbeat signal and reduces road noise. A basic experiment was conducted on an actual road at low speed. The pr...Show More
Estimation of muscle fatigue by ratio of mean frequency to average rectified value from surface electromyography
2016 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)
Year: 2016 | Conference Paper |
Cited by: Papers (5)
A new method to estimate muscle fatigue quantitatively from surface electromyography (EMG) is proposed. The ratio of mean frequency (MNF) to average rectified value (ARV) is used as the index of muscle fatigue, and muscle fatigue is detected when MNF/ARV falls below a pre-determined or pre-calculated baseline. MNF/ARV gives larger distinction between fatigued muscle and non-fatigued muscle. Experi...Show More
Controlling interfered area in interferential current stimulation by electrode-area patterning
2016 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)
Year: 2016 | Conference Paper |
Interferential current therapy is a noninvasive therapy using simultaneously two or more medium-frequency currents passing through tissue. By controlling the interfered area of the current flows, selective stimulation is possible in target muscles, including deep muscles. However, controlling the interfered area or the intensity of the current precisely is still lacking. Using simulations based on...Show More
Fall risk estimation based on co-contraction of lower limb during walking
S. Bounyong;S. Adachi;J. Ozawa;Y. Yamada;M. Kimura;Y. Watanabe;K. Yokoyama
2016 IEEE International Conference on Consumer Electronics (ICCE)
Year: 2016 | Conference Paper |
Cited by: Papers (6)
Monitoring biosignals has become more people-friendly since the development of wearable electro-conductive cloth. This paper proposes an application using wearable EMG sensors that estimates the fall risk of elderly people based on co-contraction of the lower limb during walking. Fifty-two healthy elderly people participated in a gait test with continuous EMG of the thigh (rectus femoris and bicep...Show More
Estimation of wrist angle using EMG and hand movement direction
2016 IEEE International Conference on Consumer Electronics (ICCE)
Year: 2016 | Conference Paper |
Cited by: Papers (2)
Since the development of wearable sensor, operating a device can be done by hand gesture based on EMG. However, some operations are not easily assigned by a single gesture, such as gradual volumes. To enable those operation types, we propose an estimation method that exploits the hysteresis loop between the joint angle and measured EMG. We confirm the effectiveness of the proposed method using EMG...Show More
Improved human pulse peak estimation using derivative features for noncontact pulse transit time measurements
2015 International Joint Conference on Neural Networks (IJCNN)
Year: 2015 | Conference Paper |
Cited by: Papers (7)
This paper proposes a method to estimate temporally accurate human pulse peaks for noncontact pulse transit time (PTT) measurements. The PTT is considered as a significant diagnostic index for conditions such as blood pressure and arterial stiffness; however, millisecond-order accuracy is required in the determination of each pulse peak. In this study, human pulse waveforms are obtained from wrist...Show More
Non-contact pulse transit time measurement using imaging camera, and its relation to blood pressure
2015 14th IAPR International Conference on Machine Vision Applications (MVA)
Year: 2015 | Conference Paper |
Cited by: Papers (23)
This study reports pulse transit time (PTT) measurements of two areas of the human body (wrist and ankle) by a single imaging camera. The pulse peaks at both areas were extracted by finite impulse response (FIR) low-pass filtering and phase delay compensation. The interbeat intervals (IBIs) obtained by the camera and a photoplethysmogram sensor were almost identical, confirming the temporal accura...Show More
Electrode layout of wristband EMG measuring device for hand gesture recognition
2015 IEEE International Conference on Consumer Electronics (ICCE)
Year: 2015 | Conference Paper |
Cited by: Papers (2)
In this study, we discuss a layout of electrodes on a wrist for EMG measurements to recognize hand gestures. Experimental results show that the proposed layout uses only half of the electrodes, but suffers only about 3% drop in recognition rate compared with the conventional layout. Furthermore, we developed a television operating system based on hand gestures, using a wristband-type EMG device wi...Show More
Target object color-based force feedback compensation control in master-slave systems
The 23rd IEEE International Symposium on Robot and Human Interactive Communication
Year: 2014 | Conference Paper |
Visual color information is thought to affect human perception. This study proposes a master-slave system that performs force feedback compensation control based on the color of the target object. In this system, the ratio between forces exerted during tasks performed on dark and bright objects is used as a compensatory gain in the feedback force. The system is designed to maintain task consistenc...Show More
Vascular load reduction control based on operator's skill for catheter insertion
2013 IEEE/RSJ International Conference on Intelligent Robots and Systems
Year: 2013 | Conference Paper |
This paper proposes a method for vascular load reduction control that operates in regard to the load on contact points of catheter and blood vessels in catheter insertion. We make an extracorporeal estimation of the load on the contact points, and perform control with a robot arm to reduce the estimated load. We aim to reduce the vascular load through extracting and vibrating action as actually ap...Show More
Estimation of respiratory signal from thoracic impedance cardiography in low electrical current
2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)
Year: 2013 | Conference Paper |
A new method to estimate respiratory signal from thoracic impedance is proposed. To realize battery powered, wearable respiratory monitoring devices, low current impedance measurement techniques are desired. However, under low current conditions, conventional methods to separate cardiac and respiratory signals do not work well as the cardiac signal is much larger than the respiratory signal. In th...Show More
Fixation distance estimation using vergence eye movement for automatic focusing glasses
Tsuyoshi Inoue;Souksakhone Bounyong;Yumiko O. Kato;Jun Ozawa
2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)
Year: 2013 | Conference Paper |
In this study, we propose a method for estimating fixation distance on the basis of measurements of vergence eye movements. The aim of this approach is to control the lens focus of automatic focusing glasses. To reduce user effort at the time of calibration, the calibration was performed at infinite distance gazing, and the parameters were determined from the premeasured pupillary distance at infi...Show More
Evaluating visual fatigue by sensing eye movement during viewing of 3D images
The 1st IEEE Global Conference on Consumer Electronics 2012
Year: 2012 | Conference Paper |
Cited by: Papers (3)
In this study, we discuss indexes that can be used to quantify users' visual fatigue when they watch three-dimensional (3D) visual contents with consumer displays. We discuss two indexes with values that can be calculated by biological signal processing without disturbing the viewing of 3D contents. One is a video-oculography (VOG) index, and the other is an electro-oculography (EOG) index. To cla...Show More
Collision avoidance path planning for hospital robot with consideration of disabled person's movement characteristic
Jeffry Bonar Fernando;Toru Tanigawa;Eiichi Naito;Katsuyoshi Yamagami;Jun Ozawa
The 1st IEEE Global Conference on Consumer Electronics 2012
Year: 2012 | Conference Paper |
Cited by: Papers (6)
A novel algorithm of collision avoidance path planning, especially for hospital robot, is proposed. The algorithm puts into consideration the movement characteristic of various kinds of disabled person, which are represented by wheelchair user and crutch user here. A model which implies the energy to move to a certain point from present location is introduced for each kind of disabled person. The ...Show More
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