Abstract: The present invention provides a new art for grasping a moving direction of an underwater vehicle. In order to grasp the moving direction of the underwater vehicle, a measurement apparatus 2000 is installed in an underwater vehicle 4000. An electromagnetic wave receiving unit 2020 receives an electromagnetic wave signal, which a signal outputting apparatus 3000 outputs with a first frequency, in the water. A sound receiving unit 2040 receives a sound signal, which the signal outputting apparatus 3000 outputs with a second frequency, in the water. A frequency calculating unit 2050 calculates a frequency of the electromagnetic wave signal which the electromagnetic wave receiving unit 2020 receives, and a frequency of the sound signal which the sound receiving unit 2040 receives.

Abstract: An electric power transmission device for wirelessly transmitting electric power in a highly conductive medium includes a power transmitting unit configured to wirelessly transmit electric power and a power receiving unit configured to intromit the wireless electric power transmitted from the power transmitting unit. The power transmitting unit and the power receiving unit include an electric power transmission coil and a containment member having a dielectric configured to cover the electric power transmission coil, and transmit the electric power by causing resonance at a frequency determined by impedance of the power transmitting unit, impedance of the power receiving unit, and impedance of the highly conductive medium.

Abstract: The present invention provides a new art for grasping a moving direction of an underwater vehicle. In order to grasp the moving direction of the underwater vehicle, a measurement apparatus 2000 is installed in an underwater vehicle 4000. An electromagnetic wave receiving unit 2020 receives an electromagnetic wave signal, which a signal outputting apparatus 3000 outputs with a first frequency, in the water. A sound receiving unit 2040 receives a sound signal, which the signal outputting apparatus 3000 outputs with a second frequency, in the water. A frequency calculating unit 2050 calculates a frequency of the electromagnetic wave signal which the electromagnetic wave receiving unit 2020 receives, and a frequency of the sound signal which the sound receiving unit 2040 receives.

Abstract: An electric power transmission device for wirelessly transmitting electric power in a highly conductive medium includes a power transmitting unit configured to wirelessly transmit electric power and a power receiving unit configured to intromit the wireless electric power transmitted from the power transmitting unit. The power transmitting unit and the power receiving unit include an electric power transmission coil and a containment member having a dielectric configured to cover the electric power transmission coil, and transmit the electric power by causing resonance at a frequency determined by impedance of the power transmitting unit, impedance of the power receiving unit, and impedance of the highly conductive medium.

Abstract: A water current power generating device for generating electric power from water current power includes a sway vibrating body which bends in a response to a fluid force exerted on a circumference surface thereof by a water current, sways in a bending state, and generates tension in a response to a deflection angle from a direction of the water current, and at least one tension power generating unit for converting electro-magnetically or piezoelectrically the tension transferred from the sway vibrating body into the electric power such that a stable electric power can be generated from water current power in a variety of water areas of slow-moving water current to fast-moving water current.

Abstract: An acoustic transducer includes a ring oscillator. The ring oscillator includes: a first cushioning material; a pair of first and second annular members that are laminated in an axial direction thereof with the first cushioning material therebetween, each of the annular members having first and second ends in a circumferential direction thereof, and a notch portion formed between the first and second end; a first connecting portion that connects the first end of the first annular member and the second end of the second annular member; and a second connecting portion that connects the second end of the first annular member and the first end of the second annular member.

Abstract: There is provided an acoustic transducer which is reduced in size and which can generate an acoustic emission having a low frequency. The acoustic transducer of the present invention includes: a plurality of bending vibration modules 7 each of which is constructed of at least one bending vibrator made of at least one plate-shaped piezoelectric vibrator and at least one vibration plate; a plurality of support members 9 each of which supports each of bending vibration modules 7; and end plates which close both end portions of the acoustic transducer. The plurality of bending vibration modules 7 are arranged in a shape of a cylinder. Each of support members 9 is extended radially from the center of bending vibration modules 7 that are arranged in a shape of a cylinder and is joined to an end portion of each of the vibration plates of bending vibration modules 7 adjacent to each other. Further, a part of support members 9 has a cutout portion formed at an end portion thereof.

Abstract: An acoustic transducer that enables acoustic radiation at a low frequency and that also improves efficiency of the acoustic radiation into liquid is provided. The acoustic transducer according to the present invention includes bending vibration module 7 that is formed by at least one bending oscillating body 1 that has at least one plate type piezoelectric resonator 2 and diaphragm 3, and supporting member 9 for supporting bending vibration module 7. A plurality of bending vibration modules 7 are cylindrically arranged, and supporting members 9 radially protrude from shaft 8 provided at the center of the cylindrically arranged bending vibration modules 7 and are joined with the ends of diaphragms 3 of adjoining bending vibration modules 7.

Abstract: A pressure-receiving cylinder (11) is in a columnar shape extending in the direction of a center axis (O), and having an orthogonal cross section to the center axis (O) that defines a rotationally symmetrical contour. In a piezoelectric ceramic structure (12), piezoelectric ceramic modules are arranged in a rotationally symmetrical manner around the center axis (O), each piezoelectric ceramic module including a pair of piezoelectric ceramic and electrodes connected thereto in the polarization direction. Containers (8, 10) are connected to respective ends of the piezoelectric ceramic module (15) in the polarization direction, and apply a stress corresponding to an external force received by the pressure-receiving cylinder (11) to the pressure-receiving cylinder (11) and the piezoelectric ceramic structure (12). Respective voltages output by the plurality of piezoelectric ceramic modules are added together.

Abstract: The present invention provides an information display device including an imaging unit that executes an imaging process to image a subject to output an imaging signal; a monitor capable of displaying an image of the subject based on the imaging signal; a switching part located near the monitor; a first display controller for displaying, in a menu on the monitor, each of a first group of items consisting of a plurality of items associated with the imaging process, whereby first setting data can be set; and a second display controller for displaying, in a menu on the monitor, each of a second group of items associated with a plurality of particular items in the first group and having fewer items than the first group, whereby second setting data can be set, wherein switching between the first and second display controllers is performed by operating the switching part.

Abstract: There is provided a water current power generating device for generating electric power from water current power, the device comprising: a sway vibrating body which bends in response to a fluid force exerted on a circumference surface thereof by a water current, sways in a bending state, and generates tension in response to a deflection angle from a direction of the water current, and at least one tension power generating unit for converting electro-magnetically or piezoelectrically the tension transferred from the sway vibrating body into the electric power. With the above configurations, ever stable electric power can be generated from water current power in a variety of water areas of slow-moving water current to fast-moving water current.

Abstract: An acoustic transducer radiates a sound wave into a medium, and includes: a shaft member which extends at a center portion of the acoustic transducer; first and second cylindrical acoustic radiation plates which have a cylindrical shape, a central axis of the first and second cylindrical acoustic radiation plates agreeing with the longitudinal axis of the shaft member, the first and second cylindrical acoustic radiation plates alternately arranged in a direction of the central axis; a plurality of connection members which have a ring shape, and connect adjacent first and second acoustic radiation plates to each other; a plurality of bending vibration plates each of which connects the shaft member and one of the connection members to each other; and a plurality of vibrators which are provided on the bending plates.

Abstract: An acoustic transducer includes a ring oscillator. The ring oscillator includes: a first cushioning material; a pair of first and second annular members that are laminated in an axial direction thereof with the first cushioning material therebetween, each of the annular members having first and second ends in a circumferential direction thereof, and a notch portion formed between the first and second end; a first connecting portion that connects the first end of the first annular member and the second end of the second annular member; and a second connecting portion that connects the second end of the first annular member and the first end of the second annular member.

Abstract: An information display device including an imaging unit that executes an imaging process to image a subject to output an imaging signal; a monitor capable of displaying an image of the subject based on the imaging signal; a switching part located near the monitor; a first display controller for displaying, in a menu on the monitor, each of a first group of items consisting of items associated with the imaging process, whereby first setting data can be set; and a second display controller for displaying, in a menu on the monitor, each of a second group of items associated with particular items in the first group and having fewer items than the first group, whereby second setting data can be set, in which switching between the first and second display controllers is performed by operating the switching part.

Abstract: There is provided an acoustic transducer which is reduced in size and which can generate an acoustic emission having a low frequency. The acoustic transducer of the present invention includes: a plurality of bending vibration modules 7 each of which is constructed of at least one bending vibrator made of at least one plate-shaped piezoelectric vibrator and at least one vibration plate; a plurality of support members 9 each of which supports each of bending vibration modules 7; and end plates which close both end portions of the acoustic transducer. The plurality of bending vibration modules 7 are arranged in a shape of a cylinder. Each of support members 9 is extended radially from the center of bending vibration modules 7 that are arranged in a shape of a cylinder and is joined to an end portion of each of the vibration plates of bending vibration modules 7 adjacent to each other. Further, a part of support members 9 has a cutout portion formed at an end portion thereof.

Abstract: A pressure-receiving cylinder (11) is in a columnar shape extending in the direction of a center axis (O), and having an orthogonal cross section to the center axis (O) that defines a rotationally symmetrical contour. In a piezoelectric ceramic structure (12), piezoelectric ceramic modules are arranged in a rotationally symmetrical manner around the center axis (O), each piezoelectric ceramic module including a pair of piezoelectric ceramic and electrodes connected thereto in the polarization direction. Containers (8, 10) are connected to respective ends of the piezoelectric ceramic module (15) in the polarization direction, and apply a stress corresponding to an external force received by the pressure-receiving cylinder (11) to the pressure-receiving cylinder (11) and the piezoelectric ceramic structure (12). Respective voltages output by the plurality of piezoelectric ceramic modules are added together.

Abstract: An acoustic transducer that enables acoustic radiation at a low frequency and that also improves efficiency of the acoustic radiation into liquid is provided. The acoustic transducer according to the present invention includes bending vibration module 7 that is formed by at least one bending oscillating body 1 that has at least one plate type piezoelectric resonator 2 and diaphragm 3, and supporting member 9 for supporting bending vibration module 7. A plurality of bending vibration modules 7 are cylindrically arranged, and supporting members 9 radially protrude from shaft 8 provided at the center of the cylindrically arranged bending vibration modules 7 and are joined with the ends of diaphragms 3 of adjoining bending vibration modules 7.

Abstract: An acoustic transducer radiates a sound wave into a medium, and includes: a shaft member which extends at a center portion of the acoustic transducer; first and second cylindrical acoustic radiation plates which have a cylindrical shape, a central axis of the first and second cylindrical acoustic radiation plates agreeing with the longitudinal axis of the shaft member, the first and second cylindrical acoustic radiation plates alternately arranged in a direction of the central axis; a plurality of connection members which have a ring shape, and connect adjacent first and second acoustic radiation plates to each other; a plurality of bending vibration plates each of which connects the shaft member and one of the connection members to each other; and a plurality of vibrators which are provided on the bending plates.

Abstract: An electro-acoustic transducer includes a first electro-acoustic transduction unit. The first electro-acoustic transduction unit includes an acoustic radiation plate which radiates a sound wave, a bending vibration plate including a vibrator, and a first coupling member which couples an edge portion of the acoustic radiation plate with an edge portion of the bending vibration plate together.

Abstract: The present invention provides an information display device including an imaging unit that executes an imaging process to image a subject to output an imaging signal; a monitor capable of displaying an image of the subject based on the imaging signal; a switching part located near the monitor; a first display controller for displaying, in a menu on the monitor, each of a first group of items consisting of a plurality of items associated with the imaging process, whereby first setting data can be set; and a second display controller for displaying, in a menu on the monitor, each of a second group of items associated with a plurality of particular items in the first group and having fewer items than the first group, whereby second setting data can be set, wherein switching between the first and second display controllers is performed by operating the switching part.