Abstract: An elastic wave device includes an IDT electrode and a first dielectric layer provided on a piezoelectric substrate. An intersection region where first electrode fingers and second electrode fingers in the IDT electrode overlap each other as viewed from an elastic wave propagation direction includes a center region, a first edge region located on one side of the center region in a direction in which the first electrode fingers and the second electrode fingers extend, and a second edge region located on the other side of the center region in the direction in which the first electrode fingers and the second electrode fingers extend. A mass addition film laminated on the first dielectric layer includes portions of at least two thicknesses.

Abstract: An elastic wave device includes an IDT electrode on a piezoelectric substrate to define a longitudinally coupled resonator elastic wave filter, a three-dimensional wiring portion on the piezoelectric substrate and connected to the longitudinally coupled resonator elastic wave filter, and a cover surrounding the longitudinally coupled resonator elastic wave filter on the piezoelectric substrate. The three-dimensional wiring portion includes a lower layer wiring line, an upper layer wiring line, and an insulating layer stacked between the lower layer wiring line and the upper layer wiring line. The cover includes a portion on the three-dimensional wiring portion.

Abstract: A method for detecting damage of a wind turbine blade of a wind turbine rotor having at least one wind turbine blade comprises: a light incident step of allowing light to enter an optical fiber sensor being mounted on each of the wind turbine blade and having a diffraction grating part having a refractive index which is periodically varied in a longitudinal direction of the diffraction grating part; a light detection step of detecting reflected light from the diffraction grating part; an obtaining step of obtaining, from a temporal change of a wavelength of the reflected light received in the light receiving step, a wavelength variation index representing a variation amount of the wavelength; and a damage determination step of determining presence or absence of a damage of the wind turbine blade on the basis of the wavelength variation index calculated in the obtaining step.

Abstract: A method of detecting a damage of a wind turbine blade of a wind turbine rotor includes: a light input step of inputting light into a fiber-optic sensor mounted to the wind turbine blade; a light detection step of detecting reflection light from the grating portion; an obtaining step of obtaining a wavelength fluctuation index representing a fluctuation amount of a wavelength of the reflection light detected in the light detection step; and a detection step. The detection step includes detecting the presence or the absence of the damage of the wind turbine blade based on the wavelength fluctuation index taking account of a correlation between the wavelength fluctuation index of the wind turbine blade and a load index related to a load applied to the wind turbine blade, or a correlation between the wavelength fluctuation index and a temperature index related to a temperature of the wind turbine blade.

Abstract: An elastic wave device includes a multilayer film stacked on a support substrate. A first support layer surrounds a region including interdigital transducer electrodes. A second support layer is disposed in the region surrounded by the first support layer. A cover is fixed on the first support layer and the second support layer so as to close a cavity defined by the first support layer. The multilayer film is partially disposed on the support substrate, and an insulating layer is disposed in at least a portion of a region in which the multilayer film is not disposed. At least one of the first support layer and the second support layer is disposed on the insulating layer.

Abstract: A method for detecting damage of a wind turbine blade of a wind turbine rotor having at least one wind turbine blade comprises: a light incident step of allowing light to enter an optical fiber sensor being mounted on each of the wind turbine blade and having a diffraction grating part having a refractive index which is periodically varied in a longitudinal direction of the diffraction grating part; a light detection step of detecting reflected light from the diffraction grating part; an obtaining step of obtaining, from a temporal change of a wavelength of the reflected light received in the light receiving step, a wavelength variation index representing a variation amount of the wavelength; and a damage determination step of determining presence or absence of a damage of the wind turbine blade on the basis of the wavelength variation index calculated in the obtaining step.

Abstract: An optical transmission medium includes a GI optical fiber that is made of silica glass. The GI optical fiber includes a core having a graded-index refractive index profile and a cladding formed around the core. The GI optical fiber is bent by equal to or more than a quarter turn with a curvature radius equal to or larger than 4 mm and equal to or smaller than 10 mm.

Abstract: A door for automatic vending machine in which a door structure having an item sample display unit is,improved according to the invention. In the door for the automatic vending machine, a concave portion 5 of a large door 2 made by one press molding is available for an item sample display unit 3 in which the item samples 6 are displayed on each of three stairs, four fluorescent lamps 7 illuminating the item samples 6 and an advertisement 8 provided under the item samples 6 are installed, each of three lamps being provided on lower portion of the item samples 6 and the other one of the lamps being provided on uppermost portion of the item sample display unit 3, and circumference of the item sample display unit 3 is covered with a small door 4 made by a transparent material 10 and having a frame 9.

Abstract: A door for automatic vending machine in which a door structure having an item sample display unit is improved according to the invention. In the door for the automatic vending machine, a concave portion 5 of a large door 2 made by one press molding is available for an item sample display unit 3 in which the item samples 6 are displayed on each of three stairs, four fluorescent lamps 7 illuminating the item samples 6 and an advertisement 8 provided under the item samples 6 are installed, each of three lamps being provided on lower portion of the item samples 6 and the other one of the lamps being provided on uppermost portion of the item sample display unit 3, and circumference of the item sample display unit 3 is covered with a small door 4 made by a transparent material 10 and having a frame 9.

Abstract: A vending machine according to the invention is easily movable and can be used at a place at which a commercial power supply is not available. Then, it can be installed at a desired place, and can effectively sell articles by certainly catching a chance for sale. The articles contained in a main box of the vending machine are selectively refrigerated or heated by a thermal storage unit, which is previously refrigerated or heated and can be fitted to or removed from the main box. A storage battery is contained in the main box and supplies electric power necessary for driving mechanisms for sale of the vending machine.

Abstract: A wafer carrier for transporting a plurality of wafers includes a pair of end panels provided In parallel with each other at opposite sides of the wafer carrier. The wafer carrier further includes a wafer supporter for supporting the plurality of wafers. The wafer supporter has two opposite side walls in parallel with each other and extending in a direction normal to the pair of end panels. Each of the side walls has two end portions respectively secured to the two end panels. The wafer supporter has a plurality of grooves which are provided, at predetermined intervals, on an inner surface thereof in parallel with one another and In parallel with the two end panels. The grooves support corresponding semiconductor wafers at their peripherals. One groove, nearest to one of the two end panels, is separated from the one of the end panels by a distance selected to minimize the number of airborne particles which become attached to a surface of a wafer facing the end panel.