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In this paper, we propose a novel human detecting system using several stationary and moving laser range finders (LRF). The occluded area where the stationary sensors cannot measure will be covered by the actively moving sensor. The occlusion is perceived by overlaying visible area of the stationary sensors. The moving sensor will move to the target position where the sensor can measure the occluded...
In a laser-foil interaction, a subwavelength-scale-multihole thin-foil target is proposed to increase the energy-conversion efficiency from laser to protons. The multiholes transpiercing the foil target enhance the laser-proton energy-conversion efficiency significantly.
In this paper, we describe our positioning system based ultra-compact Laser Range Finder (LRF) for mobile robot. The system consists of reflectors as landmark and a laser range finder (LRF) named ldquoPos-URGrdquo. The landmarks are randomly and sparsely placed in environment, and their position and posture are known. Pos-URG has map data which consists of pose information and relation information...
We have developed a normal-dispersion passively mode-locked ytterbium-doped fiber laser with a fundamental repetition rate higher than 400 MHz at a wavelength of ~1085 nm by use of a short linear cavity design.
Time is crucial in applications such as sensor data fusion, autonomous mobility and SLAM. However clocks at end systems are rarely synchronized and often running at different speeds. Lack of synchronization therefore reduces the accuracy of sensor readings. The SOKUIKI scanning laser range finder allows acquiring time values by timestamping range readings. Our work consists in a method for time synchronization,...
Recently, SOKUIKI sensor is used in various fields including robotics. SOKUIKI sensor ldquoURG-04LXrdquo can take distances by measurement. And by using special mode of the firmware, Received Light Intensity and AGC Voltage Level can be obtained. This paper describes a method to estimate Gray Level of scanned objects by using Received Light Intensity. The method uses AGC Voltage Level for accurate...
A recent trend in society is for young parents to ask for support in performing their childcare duties. Against this background and to promote the intermixing of parents and children and support information exchange between parents and nursery teachers, we developed the network-based interactive child-watch system called "Meru-robo digital log system". It is composed of the "action...
A scanning electron microscope observation is indispensable in the evaluation of the fabricated micro-and nano-structure.In the present work, we study the charge distribution in PMMA films under EB irradiation with both the experiment and the numerical simulation. In the numerical simulation, the initial distribution of the deposited charge is calculated with the Monte Carlo simulation. It is shown...
Mold releasing is one of the important issues in nanoimprint lithography (NIL). In this paper, de-molding force and friction coefficients for deteriorated surface statuses are quantitatively investigated to evaluate the surface quality of the mold. The mold surface is successfully deteriorated by UV irradiation as a durability inspection. The de-molding force and the friction coefficient are strongly...
The aim of the paper is to study the dependence of the process time on the resist properties in experimentally and predict required process time for various molecular weights in PMMA. The deformation process time in thermal NIL is predicted based on experimental study in PMMA for various molecular weights and process temperature based on experimental study. These results are extraordinary useful in...
In this report the friction coefficient is controlled by varying the surface treatment conditions of the mold and the press stress is controlled by changing the pattern shape of the mold. The demolding force is measured for various mold conditions. The demolding force clearly increases as the water contact angle decreases. This result shows that the friction coefficient increases dependence as the...
To fabricate micro-nano mixed 3-D structures, the novel mold fabrication containing micro-nano patterns in both lateral and vertical directions is difficult because there are no suitable lithography methods having deep focus depth in nanopatterning. In the hybrid NIL approach, the nanostructure could be fabricated only on the top surface of microstructures. In this paper, a newly advanced hybrid patterning...
MD simulation of the glass forming process with NIL is performed to elucidate the deformation mechanismof the glass material during NIL. The atomic and molecular behavior and interaction, such as viscous flow of the glass and adhesion between the mold and glass, are taken into account. The transition of the applied stress to the mold during mold press, rest and release are comprehensively examined...
Summary form only given. In the transfer process microstructures which are fabricated on the dummy substrate are bonded on the main substrate (Fig. 1). The process is very attractive for MEMS fabrication because movable microstructures can be fabricated without a sacrificial layer [1]. However, the following difficult requirements should be satisfied in the transfer process. The microstructures have...
Recently, tracking and counting people are requested for the security purpose. In this paper, we propose a method to track and count people with laser range finders. A method to extract the walking human from the sensor data is introduced. Multi-target model and Kalman filter based estimation are employed to track the human movement and count the number of people. The proposed method is applied to...
The energy recovery linac is a very promising synchrotron light source in future. We are contemplating to realize a ERL_based next generation light source in Japan, under a collaboration between KEK, JAEA, ISSP, and other SR institutes. To this end, we started R&D efforts on its key technologies, including a low-emittance photocathode gun and superconducting cavities. We also plan to assemble...
The purpose of this research is to develop a system which gives blind people information of the environment around them. A person is equipped with a 3D scanner and a small sized PC while walking. The scanner scans and acquires 3D range data map of the environment. The PC analyzes the range data map and detects objects which are useful for blind people in order to walk. The PC gives environmental information...
We have been studying a remote-collaboration system called SCOPE (sight collaboration by projection effect) featuring image projecting and capturing capabilities as implemented in a maintenance robot. With the help of SCOPE and a remote support person, an on-site worker can perform maintenance very efficiently. We propose a mobile SCOPE that can significantly expand the area of activity of the conventional...
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