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If pipes with narrow diameters are not well inspected, preventing accidents become difficult. Therefore, we developed a pneumatically powered earthworm-type robot for Half-inch pipes (each having an inner diameter of approximately 16 mm); these pipes are extremely difficult to inspect. When the robot travels for a long distance, its speed significantly decreases. When the movement distance of one...
We have developed an earthworm-type 25A pipe inspection robot using a pneumatic drive. However, the developed robot had a low locomotion speed. This was due to the fact that the contraction amount of the pneumatic artificial muscle used for driving the actuator of the robot was small. To resolve the problem and increase the amount of movement of the robot, an extension actuator to extend in the axial...
In recent years, powdered materials have been often used in various industries. Among the various uses of powders, we focused on the conveyance of the developer in the printers. Screw conveyors are commonly used in the printer for the conveyance of the developer. However, this presents the problems such as the condensation of the developer by the shearing force and the temperature rise. Thus, low...
Sewer pipes play an important role in a city's infrastructure. However, accidents have occurred in recent years due to increasingly old pipes. To prevent such accidents, there is a need to check the internal condition of pipes. Therefore, we focused on the locomotion of a robotic earthworm that is capable of running stably in a narrow space. We developed a peristalsis crawling robot with the goal...
We have developed a He-3 alternative neutron detector using ceramic scintillator sheets for nuclear safeguards. The alternative detector tube consists of four components: an aluminum regular square envelop tube, a light reflecting tube put on the inner surface of the square tube, a rectangular scintillator sheet sintered on a glass plate, and two PMTs provided at both ends of the tube. It permits...
Numerical analysis of the optical guide properties of the scintillation lights in the alternative He-3 neutron detector tube using a scintillator sheet has been carried out by using a ray-tracing simulation code. The detector tube consists of a light-reflecting tube, a rectangular solid scintillator sheet, and two photo-multiplier tubes (PMTs). The scintillator sheet is built inside the tube, and...
Here we report vertical metal/silicon dioxide (SiO2) multiwalled microtube arrays as electrical and optical neuroprobes for “optogenetic”. Three-dimensional metal/SiO2-microtube arrays can be fabricated by vapor-liquid-solid (VLS) growth of silicon-wire, followed by the SiO2/metal depositions and the core-silicon etching. As the inside metal, we use iridium (Ir) with a low electrical electrolyte/electrode...
The global water shortage has recently been debated at the United Nations. The main cause of this shortage is the excessive use of water resources by humans. Therefore, a positive approach to saving water is needed. Much water is used to flush toilets in homes. Thus, it is necessary to develop a sewage disposal system that saves water. We focused on the bowel peristalsis as a model for a mechanism...
In this paper, graphite nanospine cathode (GNS) were fabricated by plasma etching using microwave plasma CVD. In order to evaluate emission characteristics, a triode-type field emission X-ray tube was fabricated which was composed of GNS cathode, control electrode, and an anode. The anode current-voltage characteristics of X-ray tube was shown with respect to GNS cathode and control electrodes. This...
An earthworm moves by peristaltic crawling, which propagates extension and contraction waves along the anteroposterior direction from the anterior to posterior part, by varying the thickness and length of its segments. This locomotion mechanism is in contact with a large area on the ground when the robot moves. Furthermore, the amount of space required is less than that for other locomotion mechanisms...
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