Tsuyoshi Takayama

Design and Implementation of Ski Jumper's Motion Monitor System by Terrestrial Magnetism and Acceleration Sensors

We have confirmed that terrestrial magnetism and acceleration sensors are useful to measure ski jumper’s in run descending speed and taking-off positions using a model of ski jumping ramp. Also, we gathered required measurement by inquiring a ski jumping athlete and his coach. As this result, we confirmed following measurement: in run descending speed, jumper’s style and posture at jumping point, and slant of body of the jumper when he is flying. We are developing a ski jumper’s motion monitoring system using terrestrial magnetism, acceleration sensors, and video camera which enable to monitor such measurements. In this paper, we describe its design and implementation.

A Road Location Estimating Method by Many Trajectories to Realize Rapid Map Survey for a Car Navigation System

Electronic maps on current car navigation system is updated after surveying works, generating and editing map data when a road is newly opened to traffic. Therefore, long time is needed to update the map is completed. Also, online map updating service is now available, however, only expressways and highways are reflected for the map updating since surveying works and editing maps by hand is needed. Therefore, we have proposed a car navigation system that copes with newly constructed roads by estimating locations and shapes of new roads using many trajectories of vehicles as corrective intelligence measured by GPS. In this paper, we describe a method to estimate location of new roads and its experimental results.

On Automatic Flying Distance Measurement on Ski Jumper's Motion Monitoring System

We are developing a ski jumpers motion monitor system employing terrestrial magnetism and acceleration sensors. On this development, we have confirmed that terrestrial magnetism and acceleration sensors are useful to measure ski jumpers inrun descending speed and taking-off positions using a model of ski jumping ramp. Also, we gathered required measurement by inquiring a ski jumping athlete and his coach. As this result, we confirmed following measurement: inrun descending speed, jumpers style and posture at jumping point, and slant of body of the jumper when he is flying. We are developing a ski jumpers motion monitoring system using terrestrial magnetism, acceleration sensors and a video camera. Our system succeeded to monitor of ski jumpers take-off form as changes of degrees on jumpers knee and waist by using cheap terrestrial magnetism sensors. By using our system, it is thought that correction of wrong take-off forms can be realized. To discuss certain take-off form is good or not, flying distance by a particular jump is important. However, flying distance is not measured in daily practice with few numbers of jumpers because of various difficulties for to measure it. In this paper, we propose automatic flying distance measurement method using video cameras and terrestrial magnetism and acceleration sensors. We are assuming the proposing system is used for practices.

Location Information System for Access Points in the Heterogeneous Wireless Enviornment

Users in the heterogeneous wireless environment can choose from 3GPP wireless network, WiMAX, WiFi-Hotspot, Blue tooth, etc. depending on their situation. In addition to a charging plan and information about the transmission rate, a user or a mobile terminal should have information about which kind of communication services can be used and their coverage areas. Since most carrier operators do not disclose the accurate locations of their base stations, a location information system has to estimate an unknown base stations location on the basis of information stored in the mobile terminal, or looks for them and measures their location. We propose a location information system that estimates an unknown base stations location around a mobile terminal from positional relation of base stations and distances between the mobile terminal and unknown base stations.

An International Driving Simulator: Recognizing the Sense of a Car Body by the Simulator

It is difficult to drive smoothly when overseas because of international differences in traffic rules or car configurations. To solve this problem, we developed a driving simulator for practicing driving under different road and car configurations. For the roads in the simulator, we extracted road data from Google Maps, made 3D roads, and added traffic rules. We examined the influence on a driver of the difference between driving right- and left-hand drive cars, and whether the driver can obtain a sense of right- and left-hand driving on the simulator. Experimental results using the simulator clarified the difference in influence between right- and left-hand drive cars. We found that Japanese who usually drive a right-hand drive car in left-hand traffic tend to cross lane lines when driving a left-hand drive car.

Estimating the Number of Lanes on Rapid Road Map Survey System Using GPS Trajectories as Collective Intelligence

Electronic maps on current car navigation system is updated after surveying works, generating and editing map data when a road is newly opened to traffic. Therefore, long time is needed to update the map is completed. Also, online map updating service is now available, however, only expressways and highways are reflected for the map updating since surveying works and editing maps by hand is needed. Therefore, we have proposed a car navigation system that copes with newly constructed roads by estimating locations and shapes of new roads using many trajectories of vehicles as corrective intelligence measured by GPS. In this paper, we describe how to estimate the number of lanes using only many GPS trajectories that contain positioning errors, and we will describe its evaluations.

A gesture-based remote control for finger disabled people

A remote control is presented that enables finger disabled people to easily control various types of devices and appliances. It uses an Android smartphone, a Bluetooth/infrared conversion unit, and user gestures. Experimental evaluation demonstrated that it is easily usable by non-disabled people, except for the electronic program guide function.

A Proposal of Method for Suspicious Person Detection on P2P Security Camera Network System

Recently, the communication among neighbors is now rare, and is become difficult to watch for suspicious person by neighbor residents themselves. Therefore, we proposed a P2P Security Camera Network System that is detects suspicious person by using video data recorded by a camera on neighbor houses. In this paper, we propose four ways to detect suspicious persons based on classification methods using Local Outlier Factor (LOF) for trajectories of moving objects. And, we evaluate proposing methods the effects of useful dimensions and the number of incorrect judgment result on classification of trajectory pattern of moving objects.

A Design and Implementation of a Terrestrial Magnetism and Acceleration Sensor Device for Worker's Motion Tracing System

Guarantee of quality on industrial products is based on confirm whether materials, parts assembly and processing satisfy regulated standards or not. In some assemble process, it is hard to confirm the regulations are satisfied after once a work for the process have completed. For example, to fix a part using some screws, order to fasten the screws is regulated as a standard procedure to warrant accuracy. However, if screws are fastened in wrong order, the part will be fixed, however, incorrect order cannot be detected once this work have completed. We have long term experiment in a fuel tank attaching process in an automobile assembly factory. In this experiment, reliability of a sensor device we used was not enough. Also, to apply our system to other processes, improvement of reliability of the sensor is required. So we designed and implemented new sensor hardware. In this paper, we describe our new developed terrestrial magnetism sensor.

New Broadcasting System Combined with Radio Broadcasting and WWW

Despite the benefits those communities FM radio broadcasting services provide to their listeners, more than half of the community stations in Japan are struggling financially. This situation has arisen because the Internet has attracted advertising revenue away from radio broadcasting channels. One way to revive local FM radio broadcasting is by adding new representation function to radio signals. It is designed for many listeners to share the same information simultaneously. On the other hand, while the Web provides a variety of content, its ability to broadcast is inferior to that of TV or radio broadcasting. Combining radio broadcasting and the WWW provides a new broadcasting media. The control signals used for accessing the Web are put onto radio sound by using Acoustic OFDM technology. We developed and evaluated such a broadcasting system.