Currently, unexploded ordnances have been still buried in the ground. It is important to detect and remove them. Although the devices to detect them exist, it causes fault detection if there exist a building near unexploded ordnance. To solve the problem, a magnetic device with plural differential outputs has been developed. In this method, the influence of magnetic field generated from building is reduced. However, if the magnetic field from the area is strong, the detection is sometimes failed. In addition, it is sometimes difficult to detect unexploded ordnances if the size changed. To solve these problems, a method using differential outputs and DOG filtering is proposed in this study. By the use of DOD and DOG functions, the location of unexploded ordnance is specified easily. Even if magnetic field from building is strong and the size of the unexploded ordnance is different, it is detected correctly. These are confirmed by the simulation.
Wireless power transfer (WPT) system is one of the promising way to connect the power supply and the electrical appliances with freedom of the product layout for the next generation. At this time, the several kinds of WPT system have been proposed. Among of them, we have focused on the resonant type WPT system composed of the loop coils as the transmitting and receiving units and the resonators enhance the specified electromagnetic energy to transmit the electric power. This system has been much attractive because of its efficient power transmission especially for the middle-range distance such as the outdoor power supply to the electric vehicles. To put the stable and effective WPT system of this type into practical use, it is necessary to inspect the influence of the disturbing objects come into the transmission pass of the system. In this paper, the effect of the water and the dielectrics used as the package of the unit come into the system has been discussed. In addition, one of the ways to recover the deterioration of the transmission efficiency due to the disturbing objects has been demonstrated.
In future, kinds and purpose of sensor will be various, thus drivers cannot direct their attention all dangerous things if visual and auditory warning will be the way it is. In this paper, the cognition and response time on hearing buzzer warning (pre-crash warning) and 3D auditory warning was estimated in order to develop the warning on crossing collision. As a result, it was found that pre-crash auditory warning was effective when additional noise was large, however, 3D auditory warning was effective when additional noise was small.
We conducted an experiment to infer emotional changes induced by auditory stimulation using the pupil diameter and investigated whether the experiment could be applicable to the visually impaired people as well. The difference caused by the kind of the auditory stimulations observed in the pupil diameter of the sighted people group was also observed in the visually impaired people group in the same manner. A possibility was suggested that a pupil diameter could become an index of emotional changes in the visually impaired people as well.
Electronic products using the touchscreen tend to increase. But it is difficult for elderly people who are unfamiliar with the touchscreen to operate the electronic products employing the touchscreen. In addition, cannot recognize the buttons on the touchscreen. In this study, we are aiming to realize a touchscreen that can give a sense of the button’s location and click by a simple mechanism. The proposed touchscreen consists of a switch underneath the LCD module with a touchscreen and plates with an identification number at the top of the LCD module. When the touchscreen is pushed, the switch underneath the LCD module is also pressed. Thus, the user can get certain click feeling by the switch. For the plate put on the top of the LCD module, the places where icons are displayed in the touchscreen are hollowed out. Therefore, the edges around the buttons on the hollowed part give the user’s finger unevenness. That is, the position and boundaries of the icons can be recognized by the finger. In addition, since the type of the plate can be determined by the ID, we can provide a variety of button arrangement according to the plate used. To evaluate the click feeling and the operability, we develop a prototype system and measure the operation error and send out the questionnaires to some testees. The measured result shows that the miss ratio of key input is less than that of a traditional touchscreen. Also, the result of questionnaires indicates that our touchscreen is easier to manipulate than the conventional one.