Abstract: The battery system includes a secondary battery, a voltage sensor, a current sensor, a temperature sensor, and a processor. The processor is configured to calculate a polarization overvoltage by subtracting a voltage drop amount caused by a DC resistance and a reactive resistance of the secondary battery determined in accordance with a temperature and an SOC of the secondary battery from a voltage difference between OCV and CCV of the secondary battery.

Abstract: In a vehicle to which the present joining structure of vehicle steel plates is applied, a third welded portion is set between a first welded portion and a second welded portion, wherein at the first welded portion, a pillar outer rear flange, an SM outer rear flange, a pillar inner rear flange are joined to one another; and at the second welded portion, the pillar outer rear flange and the pillar inner rear flange are joined to each other. At the third welded portion, the pillar outer rear flange and the SM outer rear flange are joined to each other. Accordingly, a tensile load F acting on the pillar outer rear flange is distributed toward the SM outer rear flange side.

Abstract: A high viscosity material is discharged in the form of a continuous thread from an application nozzle toward an end of a workpiece and a space S on the side of the workpiece so that the high viscosity material in the form of the thread adheres to a front surface of the workpiece and the high viscosity material discharged in the form of the thread into the space on the side of the workpiece pivots around an edge of the workpiece to a back surface of the workpiece and adheres to the back surface of the workpiece. The high viscosity material can thus be applied to both the front and back surfaces of the workpiece in one step of discharging the high viscosity material only from the front surface side of the workpiece.

Abstract: A high viscosity material is discharged in the form of a continuous thread from an application nozzle toward an end of a workpiece and a space S on the side of the workpiece so that the high viscosity material in the form of the thread adheres to a front surface of the workpiece and the high viscosity material discharged in the form of the thread into the space on the side of the workpiece pivots around an edge of the workpiece to a back surface of the workpiece and adheres to the back surface of the workpiece. The high viscosity material can thus be applied to both the front and back surfaces of the workpiece in one step of discharging the high viscosity material only from the front surface side of the workpiece.

Abstract: A welding method for integrally welding three or more superposed metal plates includes a spot welding of joining the first vehicle body structure plate and the second vehicle body structure plate by spot welding in a plurality of places along an opening edge of the door opening portion in a state where each of the metal plates is superposed, and a laser welding of joining the surface plate and the first vehicle body structure plate in a plurality of places including a place between welding places of the spot welding after the spot welding. The joining being performed by emitting laser light to the surface plate and by scanning the laser light to stir a molten pool including a molten metal of the surface plate and the first vehicle body structure plate melted by the laser light.

Abstract: In a vehicle to which the present joining structure of vehicle steel plates is applied, a third welded portion is set between a first welded portion and a second welded portion, wherein at the first welded portion, a pillar outer rear flange, an SM outer rear flange, a pillar inner rear flange are joined to one another; and at the second welded portion, the pillar outer rear flange and the pillar inner rear flange are joined to each other. At the third welded portion, the pillar outer rear flange and the SM outer rear flange are joined to each other. Accordingly, a tensile load F acting on the pillar outer rear flange is distributed toward the SM outer rear flange side.

Abstract: A communication device includes a first communication unit configured to perform communication using a first scheme; a second communication unit configured to perform communication using a second scheme; a first acquirer configured to acquire, through communication using the second scheme, first information that indicates an area that allows communication using the first scheme in a first area for communication using the first scheme; a second acquirer configured to acquire second information that indicates an area that allows communication using the first scheme in an acoustic communication area; a comparator configured to compare the first information with the second information to determine whether a current position is within the area indicated by the first information; and a setupper configured to, when the current position is within the area, perform a process for establishing a communication line in accordance with the first scheme using setup information.

Abstract: Provided is a laser welding method for performing lap welding on a plurality of laminated metal plates by applying a laser beam to the metal plates. The metal plates are constituted by n pieces of metal plates laminated in order from a first metal plate to an n-th metal plate, n being an integer not less than 2. The laser welding method includes: forming a recess serving as an escape route for gas by applying a first laser beam from the first metal plate side, the escape route penetrating through the first metal plate to an (n?1)th metal plate in the laminating direction to reach the n-th metal plate; and forming a welding pool around the recess so as to maintain the shape of the recess, the welding pool being formed by applying a second laser beam to the outside of the recess.

Abstract: A laser welding method and a welded structure are provided to improve joining strength by increasing the throat depth and to prevent cracks due to stress concentration by increasing an angle at the back of the throat. The laser welding method for lap welding of multiple layered steel plates by irradiation with a laser beam includes: a step of forming a molten pool penetrating the first steel plate in a layer direction and reaching the second steel plate by irradiating the first steel plate with a first laser beam LB1; and a step of melting an outer peripheral edge of the molten pool by irradiating an outer periphery of the molten pool on the first steel plate with a second laser beam LB2 having a spot diameter D2 larger than a spot diameter D1 of the first laser beam LB1.

Abstract: A guidance information presentation system includes an operation data collection unit configured to collect operation data of a plant, an operation mode determination unit configured to determine an operation mode of a plant device provided in the plant on the basis of the collected operation data, and a guidance information presentation unit configured to present guidance information according to the operation mode. Further, the guidance information presentation unit is configured to present the guidance information according to an operation state of the plant device or a department to which operating staff belongs.

Abstract: A communication device includes: a first communication unit that performs communication with another communication device using a first communication scheme that enables communication in a first range. The first communication unit performs, when having determined that the other communication device received transmitted certain information, communication with the other communication device in a second range that is different from the first range and in which the other communication device is capable of receiving the certain information. The communication device relays communication from the other communication device to another device disposed outside the second range.

Abstract: A welding method for integrally welding three or more superposed metal plates includes a spot welding of joining the first vehicle body structure plate and the second vehicle body structure plate by spot welding in a plurality of places along an opening edge of the door opening portion in a state where each of the metal plates is superposed, and a laser welding of joining the surface plate and the first vehicle body structure plate in a plurality of places including a place between welding places of the spot welding after the spot welding. The joining being performed by emitting laser light to the surface plate and by scanning the laser light to stir a molten pool including a molten metal of the surface plate and the first vehicle body structure plate melted by the laser light.

Abstract: A laser welding apparatus includes a measuring unit that measures a penetration depth of a molten pool by interferometry, and a controller that controls the measuring unit. The measuring unit includes a light source emitting a laser beam for measurement, a splitter that splits the laser beam into a measuring beam and a reference beam, a light-receiving element receiving an interference beam synthesized from the measuring beam reflected from the molten pool and the reference beam reflected from the reference mirror, a scanning mechanism that varies an application position of the measuring beam travelling toward the molten pool, and an image-capturing unit that captures an image of the molten pool. The controller determines a deepest portion of the molten pool based on the image captured by the image-capturing unit, and controls the scanning mechanism such that the measuring beam travelling toward the molten pool is applied to the deepest portion.

Abstract: A communication device includes a first communication unit configured to execute radio communication by using a first communication method, the first communication method allowing the radio communication to be executed within a first communication range; a second communication unit configured to execute radio communication by using a second communication method, the second communication method allowing the radio communication to be executed within a second communication range; and a permission processing unit configured to generate communication permission information to permit executing the radio communication by the first communication method, wherein the second communication unit is configured to receive setting information for establishing the radio communication by the first communication method, and wherein the first communication unit is configured to execute the radio communication by using the first communication method with another communication device that receives the setting information and the c

Abstract: A communication device includes: a first communication unit that performs communication with another communication device using a first communication scheme that enables communication in a first range. The first communication unit performs, when having determined that the other communication device received transmitted certain information, communication with the other communication device in a second range that is different from the first range and in which the other communication device is capable of receiving the certain information. The communication device relays communication from the other communication device to another device disposed outside the second range.

Abstract: A communication device includes: a first communication unit that performs wireless communication through a first communication scheme; a second communication unit that performs wireless communication through a second communication scheme in a second communication range; and a connecting module configured to establish a communication connection that forms an external network. The second communication unit transmits setup information for establishing a communication line through the first communication scheme. The first communication unit performs wireless communication through the first communication scheme with another communication device that has received the setup information. The connecting module forms an exclusive external network to establish a communication connection with an external device disposed in a communication system that exists at a physically different place.

Abstract: A communication device includes: a communication unit that performs communication with another communication device in a first range through a first communication scheme; and a detecting unit that detects prescribed information within a second range different from the first range. When the detecting unit detects the prescribed information, the communication unit performs communication with the other communication device within the second range through the first communication scheme.

Abstract: A communication device includes a first communication unit configured to perform communication using a first scheme; a second communication unit configured to perform communication using a second scheme; a first acquirer configured to acquire, through communication using the second scheme, first information that indicates an area that allows communication using the first scheme in a first area for communication using the first scheme; a second acquirer configured to acquire second information that indicates an area that allows communication using the first scheme in an acoustic communication area; a comparator configured to compare the first information with the second information to determine whether a current position is within the area indicated by the first information; and a setupper configured to, when the current position is within the area, perform a process for establishing a communication line in accordance with the first scheme using setup information.

Abstract: A communication device includes a first communication unit configured to execute radio communication by using a first communication method, the first communication method allowing the radio communication to be executed within a first communication range; a second communication unit configured to execute radio communication by using a second communication method, the second communication method allowing the radio communication to be executed within a second communication range; and a permission processing unit configured to generate communication permission information to permit executing the radio communication by the first communication method, wherein the second communication unit is configured to receive setting information for establishing the radio communication by the first communication method, and wherein the first communication unit is configured to execute the radio communication by using the first communication method with another communication device that receives the setting information and the c

Abstract: A communication device includes a first communication unit to execute radio communication by a first communication scheme allowing execution of the radio communication within a first communication range; a second communication unit to execute radio communication by using a second communication scheme allowing execution of the radio communication within a second communication range; a setting information retrieval unit to obtain, upon detecting that the communication device is within a predetermined area, setting information for establishing the radio communication by the first communication scheme; and a disconnection processing unit to disconnect radio communication with another communication device, wherein the first communication unit executes radio communication with the other communication device that obtains the setting information, and wherein, upon detecting that the communication device is not located within the second communication range, the disconnection processing unit disconnects the radio commu