Patent application number | Description | Published |
20130045626 | POWER STRIP AND ELECTRICAL POWER MEASUREMENT SYSTEM - A power strip includes a casing including a plurality of plug insertion portions each having a first insertion port and a second insertion port into which first and second plug blades of a socket plug are to be respectively inserted, a magnetic core which is provided in each of the plurality of plug insertion portions and includes a first opening into which the first plug blade is to be inserted, a second opening into which the second plug blade is to be inserted, and a slit to communicate between the first plug blade and the second plug blade, and a magnetic sensor provided inside the slit. | 02-21-2013 |
20130313899 | POWER STRIP AND POWER MEASUREMENT METHOD - A power strip includes: jack portions; current meters each configured to measure a current being supplied from the corresponding jack portion to one of external electrical devices, and to output a measurement signal corresponding to a magnitude of the current; and a computing unit configured to obtain instantaneous values of the current at a plurality of time points on the basis of the measurement signal, and to calculate a power value using the instantaneous values. The computing unit configured to obtain the instantaneous values of the current by using any one of a first zero point and a second zero point as a reference. | 11-28-2013 |
20130317770 | POWER STRIP AND POWER MEASUREMENT METHOD - A power strip includes: a first power line; a second power line between which and the first power line a power supply voltage is applied; a jack portion; a current meter configured to measure a current being supplied to an external electrical device from the jack portion; a first photocoupler including a first light emitting diode connected between the first power line and the second power line and configured to output a first output signal whose level is changed when the power supply voltage exceeds a first threshold; and a computing unit configured to calculate a power value by using instantaneous values of the current measured by the current meter and instantaneous values of the power supply voltage estimated from the length of a period when the level of the first output signal is changed. | 11-28-2013 |
20150084723 | CURRENT SENSOR - A downsized current sensor with a switch function is disclosed. The current sensor includes: a magnetic circuit to converge a magnetic flux generated from an electric circuit at a magnetic sensor; a switch to open and close the electric circuit in a way that operates together with a movable magnetic body configuring a part of the magnetic circuit; and a magnetizing coil to generate magnetic force enabling the movable magnetic body to be attracted to a fixed magnetic body configuring a part of the magnetic circuit. | 03-26-2015 |
20150301088 | CURRENT MEASUREMENT DEVICE AND CURRENT MEASUREMENT METHOD - A current measurement device is provided which includes a casing configured to surround a cable and a magnetic sensor. The magnetic sensor is configured to be movable along the periphery of the cable within the casing and to output an output signal varying according to a current value of a current flowing through the cable. | 10-22-2015 |
Patent application number | Description | Published |
20140133292 | COMMUNICATION METHOD AND A NODE DEVICE - A first node device transmits a first path information frame including first path information that associates a destination node device with a first forwarding destination to which the first node device forwards a data frame destined for the destination node device. A second node device other than the first node device receives the first path information frame. The second node device determines whether a forwarding path includes a loop. The forwarding path is a path from the second node device to the destination node device via the first node device and the first forwarding destination. The second node device stores the first path information upon determining that the forwarding path does not include a loop. The second node device forwards a data frame destined for the destination node device to the first node device on the basis of the first path information. | 05-15-2014 |
20140219209 | NODE DEVICE AND COMMUNICATION METHOD - A node device includes a transmitter, processor, and a receiver. The receiver receives a packet from an adjacent node device. The processor generates a cluster list and a first hello packet. The cluster list records device identification information of a node device included in a cluster. The cluster is a group of node devices for which route information is stored. The first hello packet reports the route information with cluster identification information of the cluster. The transmitter broadcasts the first hello packet. Upon receipt of, from a free-node device that does not belong to a cluster, a second hello packet that includes information that associates the cluster identification information with device identification information of the free-node device, the processor adds the device identification information of the free-node device to the cluster list until a number of node devices recorded in the cluster list reaches a threshold. | 08-07-2014 |
20150023213 | NODE APPARATUS AND COMMUNICATION METHOD - A node apparatus includes a TTL memory configured to store a TTL value for a first node apparatus in the cluster; a receiving unit configured to receive a first Hello packet including a first sequence number and a second Hello packet including a second sequence number that is incremented when the node apparatus transmits a Hello packet; a sequence number judging unit configured to judge whether a first sequence number and a second sequence number match each other; a TTL decrementing unit configured to perform a process to decrement the TTL value stored in the TTL memory, when the first sequence number and the second sequence number are identical according to a judgment; and a cluster information updating unit configured to separate the first node apparatus from the cluster, when the TTL value for the first node apparatus becomes equal to or smaller than a prescribed value. | 01-22-2015 |
20150023214 | NODE APPARATUS AND COMMUNICATION METHOD - A node apparatus in a network including a plurality of node apparatuses includes: a cluster information memory configured to store apparatus identification information of node apparatus included in a first cluster including the node apparatus; a merge cluster node number determination unit configured to obtain the number of node apparatuses included in the second cluster based on information included in the hello packet upon receipt of a hello packet from one of adjacent node apparatuses included in a second cluster, and to determine whether a sum of the number of node apparatuses included in the first cluster and that of node apparatuses included in the second cluster is equal to or smaller than a maximum number of cluster nodes; and a cluster merge processing unit configured to merge the second cluster with the first cluster based on a result of the determination. | 01-22-2015 |
20150131480 | APPARATUS AND METHOD FOR DETERMINING AN OPTIMUM GATEWAY NODE IN A COMMUNICATION NETWORK - A network includes node devices each storing a table that manages paths to plural gateway devices for connecting to another network. A node device generates a hello frame for specifying a main gateway device of the node device at a predetermined timing, and transmits the hello frame to adjacent node devices. The node device, upon receiving a hello frame from an adjacent node device operating as a first hop destination of a data frame destined for the main gateway device, determines whether quality of a path to the main gateway device is lowest among paths to the plural gateway devices, based on path quality information included in the hello frame. When the quality of a path to the main gateway device is lowest, the node device changes the main gateway device to a gateway device that is registered in the table and specified by information included in the hello frame. | 05-14-2015 |
20150134786 | SYSTEM, METHOD, AND MEDIUM - A system includes first and second apparatuses configured to communicate with a server apparatus; and a third apparatus configured to transmit data to the first apparatus and record number of transfer of the data in the system, the data including information on a destination of the data and the number of transfer, wherein the first apparatus is configured to set the destination to the second apparatus and update the number of transfer, when receiving the data and not being allowed to communicate with the server apparatus, and transmit an updated data including information on the set destination and the updated number of transfer, to the third apparatus, and the third apparatus is configured to transmit the updated data to the second apparatus based on the set destination when the updated number of transfer is equal to or smaller than the recorded number of transfer when receiving the updated data. | 05-14-2015 |
20150139030 | NODE APPARATUS, RECORD MEDIUM FOR STORING CONTROL PROGRAM, WIRELESS COMMUNICATION SYSTEM, AND METHOD FOR DATA COMMUNICATION - First node stores completion information on second node that is adjacent to the first node, the completion information indicating whether or not a route between a target destination and the second node has been constructed using an address with a specified size; acquire a first address with the specified size that specifies the first node, and transmits to adjacent nodes the completion information on the first node indicating that the route between the target destination and the first node has been constructed using an address with a specified size, when the completion information on the second node has indicated that the route between the target destination and the second node has been constructed using the address with the specified size and when the first address has been acquired; and transmits a data frame by using the first address, when the completion information on the first node is transmitted. | 05-21-2015 |
20150139237 | NODE DEVICE AND DATA RELAYING METHOD - A node device includes: a communication unit to transmit a data frame containing frequency information and receive the data frame; a storage unit to store a table in which frame identification information and the frequency information are associated; and a control unit to: determine whether a destination of the received data frame is its own node device; determine whether the frame identification information of the received data frame is registered in the table; determine whether the number of transmission times is less than or equal to the number of transmission times corresponding to the frame identification information registered in the table; update the frequency information corresponding to the frame identification information registered in the table with the frequency information of the received data frame; and increase the number of transmission times, wherein the communication unit transmits the data frame for which the number of transmission times is increased. | 05-21-2015 |
20150143104 | APPARATUS, SYSTEM, METHOD, AND MEDIUM - An apparatus includes a memory; and a processor coupled to the memory and configured to generate a first common key whose key value varies based on a first elapsed time when a notification of the first elapsed time after a start-up of another apparatus to which a data frame to be encrypted is to be transmitted has been made, generate a second common key whose key value varies based on a second elapsed time after a start-up of the apparatus when a notification of the first elapsed time has not been made, and encrypt the data frame by any one of the first common key and the second common key as a common key and transmit the encrypted data frame to the another apparatus. | 05-21-2015 |
20150215199 | NETWORK DEVICE AND COMPUTER-READABLE RECORDING MEDIUM - If destination information on a packet is not present in a routing table, a network device broadcasts, to adjacent nodes, a path request packet in which destination information on a packet is set. When the network device receives a path response packet associated with the path request packet from another node, the network device sends the packet after setting a send source node of the path response packet to the transfer destination. Furthermore, if the network device does not receive the path response packet, the network device sends, by using flooding, a packet in which the destination information on the packet is set. | 07-30-2015 |