Nippon Telegraph and Telephone Corporation

Ntt Electronics Corporation

Ntt Corporation

Atsushi Aratake

Kota Shikama

Hiroshi Ishikawa

Jun Endo

Kazuaki Watanabe

Daisuke Uchibori

Yujin Hamano

Yuko Kawajiri

Masafumi Nakagawa

Makoto Abe

Norio Sato

Takuya Tanaka

Yosuke Sakurada

Yusuke Yoshimura

Hisatoshi Kasahara

Takao Fukumitsu

Shuichi Yanagi

Suguru Oguchi

Yohei Saito

Yuta Ikeguchi

Satoshi Shigematsu

Ryoichi Kasahara

Yuichi Suzuki

Kenya Suzuki

Ken Tsuzuki

Yusuke Nasu

Shinji Mino

Motohaya Ishii

Shunichi Soma

Ikuo Ogawa

Naoki Ooba

Daiki Kobayashi

Shuichiro Asakawa

Provided is a crewless aircraft capable of accurately estimating its own position even inside a manhole, as well as a crewless aircraft control method. A crewless aircraft according to the present invention is a crewless aircraft used to inspect an interior of a manhole, and includes: a camera sensor that captures an image of a manhole opening; a plurality of rangefinders that measure a distance to a ground surface or a predetermined surface in the interior; and a control unit that estimates an own position on the basis of recognition information of the manhole opening obtained by performing recognition on image information obtained from the camera sensor, and distance information of the distance to the ground surface or the predetermined surface obtained from the rangefinders.

Unmanned aerial vehicle and control method therefor

A storage device () according to the present disclosure is a storage device that stores an unmanned aerial vehicle (), and includes a main body portion () having a curved surface on which the unmanned aerial vehicle () is movable by bringing its wheels () into contact therewith, and a gripping portion () for gripping the unmanned aerial vehicle ().

Storage device, unmanned aerial vehicle, and system

A storage device () that stores an unmanned aerial vehicle () includes a gripping portion () for gripping the unmanned aerial vehicle (), and a main body portion () having a suction surface () to which an upper surface () of the unmanned aerial vehicle () is suctioned.

A propeller guardincludes an upper frameprovided on the uppermost surface of the propeller guard, a base frameprovided on the lowermost surface of the propeller guard, and a curved framethat couples the upper frameand the base frametogether and is curved outward.

Propeller guard

A storage device () that stores an unmanned aerial vehicle () includes a main body portion () having a magnet or a magnetic body () for applying a magnetic force to the unmanned aerial vehicle () provided with a magnet () on an upper surface.

In an audio spot formation device D including a speaker unitand a support standthat supports the speaker unit, the speaker unitincludes a plurality of parametric speakersandthat divide a sound wave into a carrier wave and a sideband wave and radiate the carrier wave and the sideband wave, and a speaker disposition unitin which the plurality of speakersandare disposed, the speaker disposition unitis attached to the support standat a support unit P, at least one of a height of the support stand, an angle of attachment of the speaker disposition unitat the support unit P and a direction of at least one parametric speaker of the plurality of parametric speakersandis adjustable, and a position at which an audio spot is formed is adjusted via the adjustment.

Audio spot forming device

A strain measuring device () is a strain measuring device () for measuring strain on an FEP (), and includes a viscous body () that has a lower rigidity than the FEP () and covers an uneven surface of the FEP (), and a strain gauge () that is attached to a portion of a surface of the viscous body ().

Deformation measuring device and deformation measuring method

An audio spot forming system (S) is an audio spot forming system which transmits an alert sound to a vehicle traveling on a road, the audio spot forming system including a first parametric speaker () configured to emit a sideband wave, and a second parametric speaker () configured to emit a carrier wave, in which the sideband wave and the carrier wave are caused to intersect with each other on the road to form an audio spot.

Audio spot system and audio spot forming method

An embodiment lens structure body includes a microlens portion of double-sided asymmetric aspherical shape having a refraction surface on an illuminant side and a refraction surface on an emission side so as to be opposed to the refraction surface, and marker portions formed so as to be joined to both ends of the microlens portion in a direction perpendicular to an optical axis.

Lens structure and optical connection structure

A second core includes a first portion, a second portion, and a bending portion. In the first portion, a wave-guiding direction is a first direction parallel to a plane of a first substrate. In the second portion, a wave-guiding direction is a second direction that is at a predetermined angle with respect to the plane of the first substrate. For example, in the second portion, the wave-guiding direction is the second direction that is at substantially 90 degrees with respect to the plane of the first substrate. The bending portion connects the first portion and the second portion. A relative refractive index difference between the second core and a cladding of the second optical waveguide preferably has a value such that the propagation loss in the bending portion is equal to or smaller than 0.1 dB.

Optical circuit

An optical fiber guide structure includes a guide member uprightly provided on a connection surface of an optical waveguide device and forming a space for housing a tip of an optical fiber when the optical fiber is connected to the optical waveguide device. The guide member is made of a photocurable resin. On the plane perpendicular to the direction in which the optical fiber is inserted into the space, the diameter of an inscribed circle within an inner wall of the guide member configured to form the space is substantially identical to the outer diameter of the optical fiber. The center of the inscribed circle coincides with the center of the core exposed from the connection surface of the optical waveguide device when viewed in the direction in which the optical fiber is inserted.

Optical fiber guide structure and optical fiber connecting structure

An optical connection structure includes a waveguide substrate; a Si waveguide formed on one surface of the waveguide substrateand having a first end surface; an optical fiber having a second end surface facing the first end surface; a terrace section extending further toward the optical fiber side from an end portion on the optical fiber side of the waveguide substrate; and a support member formed on the terrace section, and including, on a top surface in a view from the terrace section, a recess c configured to support a lens.

Optical connecting structure

An optical waveguide alignment method includes a step of covering an end portion of an optical fiber, an end portion of a PLC, and a microlens with an adhesive before curing in a state in which at least one microlens is disposed between incidence and emission end faces of end portions of the optical fiber and the PLC, a step of causing light for alignment to be incident on at least one of the optical fiber or the PLC so that light enters a portion covered with the adhesive between the optical fiber and the PLC, and a step of curing the adhesive after the microlens moves onto an optical path between the optical fiber and the PLC due to radiation pressure of light. The optical fiber and the PLC are optically connected via the adhesive and the microlens, and the optical fiber, the PLC, and the microlens are mechanically connected by the adhesive.

Alignment method for optical waveguide element

A first optical waveguide, a second optical waveguide, a connection optical waveguide including a resin core that optically connects the first optical waveguide and the second optical waveguide are included. The resin core is covered with cladding. The second optical waveguide has a core with a diameter that is different from a diameter of a core of the first optical waveguide. The resin core is disposed between an end surface of the first optical waveguide and an end surface of the second optical waveguide and optically connects the first optical waveguide and the second optical waveguide. Moreover, the resin core is configured with a cured photo-curable resin.

Optical connection structure and method for manufacturing the same

An optical fiber guide structure includes a guide member that is configured to be erected on a connection end surface of an optical waveguide device and forms a space for accommodating a leading end portion of an optical fiber to be connected to the optical waveguide device. The guide member is formed of an elastically deformable material, and in a specific region a longitudinal direction of the guide member, and a diameter of an inscribed circle in contact with an inner wall of the guide member in a plane perpendicular to the longitudinal direction is smaller than an outer diameter of the optical fiber.

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Tokyo, Japan

Atsushi Aratake