Yokogawa Electric Corporation

Ntt Advanced Technology Corporation

Midori Co., Ltd.

Ricoh Company, Ltd.

Satoshi Mochizuki

Makoto Takeuchi

Shinya Nakayama

Minoru Masuda

Hideki Sugiura

Yasuaki Iwamoto

Yasuo Asahina

Kazuhiko Umemura

Takaharu Yoshitomi

Naoki Maeda

Naoyuki Fujimoto

Tomoko Utsumi

Tomoyuki Ichikawa

Tomomi Suzuki

Masaaki Yonezawa

Shinsuke Nakamura

Takamasa Yashiro

Minoru Midorikawa

Kohichi Sakata

Naoki Hariu

One aspect of the present invention provides an antenna module includes an antenna, a circuit configured to transmit and receive wireless signals by using the antenna, a housing that stores the circuit to cover circumference of the circuit, an antenna casing that stores the antenna to enable the antenna to transmit and receive wireless signals, and a first connector that is connected to the housing, the first connector being configured to input and output signals which are transmitted and received by the circuit.

Antenna module, wireless device, and field device control system

A device adapter which is connectable to the field devices, includes an interface which is connectable to the field devices, a power source configured to supply electric power to the field devices connected to the interface, and a start controller configured to perform a start control of the field devices connected to the interface to make a total power consumption of the field devices connected to the interface be within a range permitted in accordance with an explosion-proof standard.

Device adapter, device system, and start control method

A wireless module comprising includes an antenna connection end configured to be connected to external antennas, a circuit configured to select at least one of the external antennas connected to the antenna connection end, the circuit being configured to transmit and receive wireless signals by using the selected external antenna, and a first connector configured to input and output signals which are transmitted and received by the circuit.

Wireless module, wireless device, and field device control system

Disclosed is an insulation circuit comprising: a first pattern formed on a first layer of a substrate, that receives high-frequency signals; a second pattern formed on this first layer next to the first pattern and that outputs the high-frequency signals received by the first pattern; a third pattern formed on a second layer different from the first layer of the substrate and connected with a signal ground, in such a way that the first and second patterns respectively overlap in plan view; and a fourth pattern formed on the second layer next to the third pattern and connected with a frame ground, in such a way that the first and second patterns respectively overlap in plan view.

Insulation circuit and communication equipment

The purpose is to adjust a characteristic of the isolation circuit with a simple control. An isolation circuitof the invention includes a cell regionincluding a plurality of arrayed cells, each of which has a first conductorthat has at least one capacitance C, C, a second conductorthat is connected to the first conductor, has an inductance, and is short-circuited to a common electric potential, and a feed linethat is placed without a connection with the first conductorand the second conductor, each size of which is smaller than a wavelength &#x3bb; of a signal which is subject to operation of the cells; at least one power amount controllerthat controls an amount of electric power to be fed to each of the feed linesof the respective cellsof the cell region, thereby controlling either or both a dielectric constant and/or magnetic permeability of the cell region; and a circuit sectionthat is placed at a location where the circuit section undergoes action of either or both the dielectric constant and/or the magnetic permeability and that electrically isolates an input side from an output side.

Isolation circuit, system for adjusting characteristic of isolation circuit, sheilding device of isolation circuit and method for adjusting characteristic of isolation circuit

A self-diagnosis circuit is coupled to a signal transmission path between a high-frequency signal input part and an output part and is configured to diagnose a high-frequency circuit using a signal that propagates along the signal transmission path. The self-diagnosis circuit includes a detector configured to detect the high-frequency signal propagating along the signal transmission path from the output part toward the input part; and a diagnosis unit that diagnoses for an abnormality in the follower stage of the high-frequency circuit disposed between a coupling part of the self-diagnosis circuit with respect to the signal transmission path and the output part, in accordance with the detection result of the detector.

Self-diagnosis circuit

There is provided a control circuit () including: a cell area (A) comprising a plurality of cells () arranged therein, each of the cells including: a first conductor () having at least one capacitance component (C, C); a second conductor () connected to the first conductor and having an inductance component; and a feed line () provided to be in non-contact with the first conductor and the second conductor, wherein a size of each of the cells is smaller than a wavelength of a signal to be influenced by the cells; and at least one feed controller () configured to control at least one of permittivity and permeability of the cell area by changing the amount of a power supply provided to the feed line of each of the cells.

Control circuit, impedance adjusting circuit, impedance automatic adjusting circuit, radio transceiver circuit, control method, impedance adjusting method, impedance automatic adjusting method, and radio transceiving method

A wireless explosion-proof apparatus includes an antenna, an explosion-proof chamber, a communication module disposed in the explosion-proof chamber, the communication module configured to transmit and receive a wireless signal through the antenna, a connector portion having a central conductor, to which the antenna is electrically connected, the central conductor having one end connected to the communication module through a connection line and the other end exposed to the outside of the explosion-proof chamber, and a short stub module disposed in the explosion-proof chamber and disposed on the connection line, the short stub module configured to secure electric conduction between the one end of the central conductor and a ground so as to keep potential of the central conductor at certain potential.

Wireless explosion-proof apparatus

A connector includes a base connector and a cylindrical member. The base connector has a cylindrical projection to penetrate through an outside wall of an attachment subject. The cylindrical member is fitted with the cylindrical projection and has a cavity.

Connector

For measurement of a liquid level, an optical fiber connected at its one end portion to force receiving means movably arranged in liquid to receive force from the liquid is dipped in the liquid together with the force receiving means, and a change in the force acting on said force receiving means when the liquid level changes is detected as a change in strain in the optical fiber by means of an optical fiber strain gauge connected to the other end of the optical fiber, thus measuring a water level of the liquid.

Method and apparatus for measuring the level of liquid using optical fiber strain gauge

There is provided a liquid-level gauge for accurately measuring a liquid-level height of fluid to be measured. In the liquid-level gauge, a float having a uniform cross-sectional form in the height direction and a specific weight value small than that of liquid is dipped in the liquid. The float is supported by an optical fiber at a constant height such that its upper end always projects from the liquid level. One end of the optical fiber is connected to an optical fiber strain gauge and a strain detector is turned round between fiber support members. When the float receives buoyancy from the liquid, tension is applied to the strain detector of optical fiber to generate strain therein. By detecting the strain by means of an optical fiber strain gauge, a liquid-level height can be measured.

Liquid-level gauge

A tape dispenser has a housing in which a roll of adhesive tape is rotatably supported, a cutter provided on the front of the housing for cutting the adhesive tape to desired lengths, an adhering member for adhering the tape dispenser to a supporting surface, and both a support rod rotatably mounted to the housing, and a ring-shaped support disposed at an end of the support rod and rotatably supported by the adhering member. Thus, with the adhering member adhering the tape dispenser to a supporting surface, the housing of the tape dispenser can be rotated about the support rod so as to be movable between vertical and horizontal orientations. Also, the housing can be rotated 360.degree. about the adhering member such that the cutter of the tape dispenser can be moved to a desired angular position while the tape dispenser remains adhered to the supporting surface. When the adhering member is a suction pad, a position adjusting mechanism is employed to place the suction pad in a suction state or a non-suction state.

Tape cutter

A rotary eraser has a simple structure, is extremely capable of erasing a letter or other printed material, and facilitates an adjustment of the position of the erase. The rotary eraser includes a cylindrical body, an eraser holder which holds a rod eraser and is rotated by pressing down the body, an outer cylinder which is rotatable together with the eraser holder, an energizing component which biases the eraser holder in a direction in which the rod eraser protrudes, and an eraser bearer by which the position of the eraser in the eraser holder can be changed when the outer cylinder is turned.

Growing community of inventors

Tokyo, Japan

Satoshi Mochizuki