Abstract: It is to realize a field wireless relay device which can extend a life of a battery as compared to the prior art. A field wireless relay device configured to be driven by a battery and having a communication relay unit, the communication relay unit having a receiving and transmitting function of amplifying again and transmitting a received signal of wireless communication performed between a transmitting station and a receiving station through an antenna and a routing function of designating a communication path of the wireless communication, the field wireless relay device comprises an antenna control unit configured to control a connected antenna system, and an antenna control decision unit configured to decide a type of control to be performed by the antenna control unit on the basis of a signal intensity of the received signal to be relayed.

Abstract: To provide a pressure-resistant explosion-proof container in which a wireless circuit housed inside the pressure-resistant explosion-proof container can transmit and receive a high frequency signal, without installing an antenna outside. A pressure-resistant explosion-proof container includes a container made of metal, a slit functioning as an explosion-proof clearance that is formed by penetrating a wall surface of the container, and a cavity resonator that is provided in the container and in which an antenna is built that transmits and receives a high frequency signal by using the slit as a waveguide.

Abstract: 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.

Abstract: 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.

Abstract: The present invention relates to a cation exchange membrane comprising a fluorine-containing polymer containing a tetrafluoroethylene unit and a perfluoroethylene unit having a carboxylic acid-type ion exchange group, wherein a melt index a of the fluorine-containing polymer from methyl esterifying the carboxylic acid-type ion exchange group measured under the condition at 270° C., a load of 2.16 kg and an orifice inner diameter of 2.09 mm is 3 to 50 g/10 min, and the melt index a and a melt index b of the fluorine-containing polymer from methyl esterifying the carboxylic acid-type ion exchange group measured under the condition at 260° C., a load of 2.16 kg and an orifice inner diameter of 2.09 mm satisfy the relation represented by the following expression (1): (a?b)/(270?260)?0.027×a+0.19??(1).

Abstract: It is to realize a field wireless relay device which can extend a life of a battery as compared to the prior art. A field wireless relay device configured to be driven by a battery and having a communication relay unit, the communication relay unit having a receiving and transmitting function of amplifying again and transmitting a received signal of wireless communication performed between a transmitting station and a receiving station through an antenna and a routing function of designating a communication path of the wireless communication, the field wireless relay device comprises an antenna control unit configured to control a connected antenna system, and an antenna control decision unit configured to decide a type of control to be performed by the antenna control unit on the basis of a signal intensity of the received signal to be relayed.

Abstract: 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.

Abstract: To provide a pressure-resistant explosion-proof container in which a wireless circuit housed inside the pressure-resistant explosion-proof container can transmit and receive a high frequency signal, without installing an antenna outside. A pressure-resistant explosion-proof container includes a container made of metal, a slit functioning as an explosion-proof clearance that is formed by penetrating a wall surface of the container, and a cavity resonator that is provided in the container and in which an antenna is built that transmits and receives a high frequency signal by using the slit as a waveguide.

Abstract: 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.

Abstract: A home agent receives a communication packet sent out from a source terminal to a mobile terminal as a destination to transfer the communication packet to the mobile terminal connected to a foreign network. This home agent requests the mobile terminal, based on a measured result of internal resources, to bypass the home agent to perform a communication with a source terminal.

Abstract: A mobile communication system includes a home agent which transfers a communication packet to a mobile communication device connected to a foreign network, an address management section which manages a plurality of IP addresses, an address generation section which assigns any of the IP addresses managed, by the address management section to the mobile communication device as a home address thereof, a server which stores the home address of the mobile communication device and specific information of the mobile communication device in association with each other, and a source node which connects with the server through a network, and transmits the communication packet to any mobile communication device having the home addresses stored in the server as a destination.

Abstract: A data collection apparatus enables to connect to a support center via a network. The data collection apparatus has a measuring section which measures a physical quantity, a data storing section which stores measurement data obtained by the measuring section, in association with at least one of sound data and image data, a data communicating section which transmits and receives data to and from the support center, and an outputting section which reproduces and displays the transmitted and received data.

Abstract: A mobile communication system includes a home agent which transfers a communication packet to a mobile communication device connected to a foreign network, an address management section which manages a plurality of IP addresses, an address generation section which assigns any of the IP addresses managed, by the address management section to the mobile communication device as a home address thereof, a server which stores the home address of the mobile communication device and specific information of the mobile communication device in association with each other, and a source node which connects with the server through a network, and transmits the communication packet to any mobile communication device having the home addresses stored in the server as a destination.

Abstract: A home agent receives a communication packet sent out from a source terminal to a mobile terminal as a destination to transfer the communication packet to the mobile terminal connected to a foreign network. This home agent requests the mobile terminal, based on a measured result of internal resources, to bypass the home agent to perform a communication with a source terminal.

Abstract: An information delivery system having a service section; a plurality of nodes connected to the service section through a network and allocated with specific addresses that are unique within the network; and terminal devices for system users connected to the service section and the plurality of nodes through the network; wherein the service section acquires profile data of each node user through each node and analyzes the person profile data in order to mediate between each node user and each system user according to the profile data to help exchange information.

Abstract: An information delivery system having a service section; a plurality of nodes connected to the service section through a network and allocated with specific addresses that are unique within the network; and terminal devices for system users connected to the service section and the plurality of nodes through the network; wherein the service section acquires profile data of each node user through each node and analyzes the person profile data in order to mediate between each node user and each system user according to the profile data to help exchange information.

Abstract: The present invention provides a method for producing a perfluorocarbon copolymer containing functional groups, which comprises:emulsifying a perfluorocarbon monomer containing a functional group represented by the following general formula (1) into fine dispersions having an average diameter of 2 .mu.m or less in water:CF.sub.2 .dbd.CF--O--(CF.sub.2 CF(CF.sub.3)--O)n--(CF.sub.2)m--Z(1)wherein m is an integer of 2 to 4; Z is CO.sub.2 R (where R represents an alkyl group having 1 to 3 carbon atoms) or SO.sub.2 F; n is 1 or 2 when Z is CO.sub.2 R and n is an integer of 0 to 2 when Z is SO.sub.2 F,adding at least one water-soluble organic chain transfer agent selected from the group consisting of aliphatic alcohols having 1 to 6 carbon atoms and ethers having 2 to 6 carbon atoms andpolymerizing the perfluorocarbon monomer (1) containing a functional group with tetrafluoroethylene represented by the following formula (2):CF.sub.2 .dbd.CF.sub.2 (2).

Abstract: A programmable controller is disclosed that incorporates a sequence control program adapted to input and output information to a variety of local intelligent appliances at a high velocity and a high efficiency in the field of factory automation for efficiently controlling factory production lines or the field of process automation for controlling multiple industrial processes. Provided for this purpose is an improved a change-over system associated with a 1-bit processor and an ordinary processor for executing the sequence control program. Also improved are functions for a user to particularly specify a BASIC program, software/hardware control functions for a group of I/O boards for transferring signals to receiving signals from the local appliances, and the ability to program the internally stored sequence control program.