Abstract: A molten iron temperature prediction method for a blast furnace executed by a device configured by a computer includes: an image conversion processing step of converting temperature data of a furnace body into a two-dimensional image by an image conversion processing unit included in the computer; and a molten iron temperature prediction processing step of outputting, by a molten iron temperature prediction processing unit included in the computer, a future molten iron temperature by inputting image data output in the image conversion processing step for current temperature data of the furnace body to a molten iron temperature prediction model of which learning is performed using image data output in the image conversion processing step as input data and a molten iron temperature as output data.

Abstract: A power supply control device is to be installed in a vehicle. The power supply control device controls power supply via a semiconductor switch and a fuse by turning the semiconductor switch ON or OFF. The semiconductor switch and the fuse are mounted on a circuit board. In the fuse, two long plate-shaped terminals are arranged in a row. The fusing portion and a part of the two terminals are covered with a housing having heat resistance. The two terminals are disposed in a current path of a current flowing through the semiconductor switch. The current flows through the fusing portion. If the temperature of the fusing portion exceeds a predetermined temperature, the fusing portion is fused.

Abstract: A continuous casting start timing determination method, a continuous casting facility operation method, a slab manufacturing method, a determining device, a continuous casting start determination system, and a display terminal device are provided. A continuous casting start timing determination method for determining a continuous casting start timing includes: a measurement step of measuring temperatures in a copper plate of a casting mold in the continuous casting facility, by use of a plurality of temperature sensors provided in a casting-direction determination position as a predetermined casting-direction position on the copper plate; and a determination step of determining the start timing based on a casting-direction position of a molten metal surface of molten steel, the casting-direction position being estimated based on measurement results in the measurement step and a width of a slab to be cast in the continuous casting facility.

Abstract: An on-vehicle device is provided with a fuse. A plurality of terminals each have a long-plate shape and are aligned with each other. A fusible portion is connected to two of the plurality of terminals. A housing covers a part of the plurality of terminals and the fusible portion and has heat resistance equal to or higher than 300 degrees. Current flows through the fusible portion. The fusible portion is blown out in the case where the temperature of the fusible portion exceeds a predetermined temperature.

Abstract: A power supply control apparatus controls the supplying of power through a wire. A fuse and a semiconductor switch are disposed on a current path of a wire current that flows through the wire. The fuse and the semiconductor switch are attached to a circuit board. A plurality of terminals of the fuse are connected by solder to the circuit board. A fusing portion is connected between two terminals out of the plurality of terminals. The two terminals are disposed on the current path of the wire current. The fusing portion blows according to the temperature of the fusing portion. A microcomputer issues an instruction to switch off the semiconductor switch according to the wire temperature of the wire.

Abstract: An in-mold solidified shell thickness estimation apparatus includes: an input device; a model database configured to store a model formula and a parameter related to a solidification reaction of a molten steel inside a mold of a continuous casting facility; and a heat transfer model calculator configured to estimate an in-mold solidified shell thickness by calculating temperature distributions of the mold and of the molten steel inside the mold by solving a three-dimensional unsteady heat transfer equation. The heat transfer model calculator is configured to correct errors in a temperature of a mold copper plate and in an amount of heat removed from the mold, by correcting an overall heat transfer coefficient between the mold copper plate and the solidified shell.

Abstract: A blast furnace slag level estimation method and blast furnace slag level estimation apparatus can estimate the liquid level of slag to a high degree of accuracy. An operation guidance method, method of producing hot metal, and operation guidance apparatus also provide guidance for the operation of a blast furnace based on a highly accurately estimated liquid level of slag. The blast furnace slag level estimation method includes a step (S2) of calculating a liquid level of melt containing slag for each region in a plurality of regions separated by a low permeability zone, using a physical model that takes at least one of hot metal tapping rate, slag tapping rate, hot metal production rate, and slag production rate as an input and that is based on a mass balance assuming existence of the low permeability zone with poor permeation of slag at a bottom of a furnace.

Abstract: A hot metal temperature prediction method includes a reaction amount calculation step (S1) of calculating a reaction amount inside a blast furnace using a physical model that takes into account reactions and heat transfer phenomena inside the blast furnace, a deviation calculation step (S2) of calculating a deviation between the reaction amount calculated using the physical model and a measured reaction amount, a model parameter adjustment step (S3) of adjusting a parameter of the physical model that causes drift in a gas inside the blast furnace, so that the calculated deviation is reduced, and a hot metal temperature prediction step (S4) of predicting a future hot metal temperature using the physical model for which the parameter was adjusted.

Abstract: An ECU (on-board device) includes a fuse F1 and a blown fuse detection circuit. The blown fuse detection circuit monitors a fuse voltage between two connection nodes respectively located upstream and downstream of the fuse in a current path of a current flowing from a positive electrode of a DC power supply through the fuse. The blown fuse detection circuit outputs a voltage lower than a reference voltage if the fuse voltage is lower than a voltage threshold value. The blown fuse detection circuit outputs a voltage higher than or equal to the reference voltage if the fuse voltage is higher than or equal to the voltage threshold value.

Abstract: An in-vehicle device of the present invention includes a fuse and an upstream capacitor having one end connected to a connection node upstream of the fuse in a current path of current that flows through the fuse. One end of a downstream capacitor is connected to a connection node downstream of the fuse in the current path. A determiner determines whether or not the fuse is blown based on an upstream voltage that passed through the upstream capacitor and a downstream voltage that passed through the downstream capacitor.

Abstract: A circuit device for a vehicle is arranged in a power supply path. In the circuit device, a first conductive pattern and a second conductive pattern are arranged on an insulating layer. The first conductive pattern and the second conductive pattern are connected to each other by a fuse (circuit element). A bus bar is arranged on the first conductive pattern. Therefore, when a current flows through a conductor constituted by the bus bar and the first conductive pattern, the amount of heat generated in the conductor is small.

Abstract: A breakout prediction method includes: a step of inputting a dimension of a solid product withdrawn from a mold in a continuous casting machine; a step of detecting a temperature of the mold by a plurality of thermometers embedded in the mold; a step of executing interpolation processing on the detected temperatures detected by the plurality of thermometers according to the dimension of the solid product; a step of calculating, based on the temperatures calculated by executing the interpolation processing, a component in a direction orthogonal to an influence coefficient vector obtained by principal component analysis as a degree of deviation from during a normal operation in which a breakout has not occurred; and a step of predicting a breakout based on the degree of deviation.

Abstract: A power supply control device is to be installed in a vehicle. The power supply control device controls power supply via a semiconductor switch and a fuse by turning the semiconductor switch ON or OFF. The semiconductor switch and the fuse are mounted on a circuit board. In the fuse, two long plate-shaped terminals are arranged in a row. The fusing portion and a part of the two terminals are covered with a housing having heat resistance. The two terminals are disposed in a current path of a current flowing through the semiconductor switch. The current flows through the fusing portion. If the temperature of the fusing portion exceeds a predetermined temperature, the fusing portion is fused.

Abstract: Provided is current detection apparatus for detecting current flowing through a power supply path of a power supply control apparatus. The power supply path includes a first conductor and a second conductor. The current detection apparatus includes: a first and a second shunt resistor connected in parallel between the first and the second conductor, and a current detection circuit detecting: (1) current flowing through the first shunt resistor; and (2) current flowing from the first to the second conductor via both the first and second shunt resistors. The current detection apparatus further includes an arithmetic circuit that calculates current flowing through the power supply path based on a correlative relationship between the current flowing from the first to the second conductor via both the first and the second shunt resistor and current flowing through the first shunt resistor, and the current detected by the current detection circuit.

Abstract: A control method for a continuous casting machine, includes: estimating, by on-line real-time system, a flow state of molten steel in a mold by using an operation condition of a continuous casting machine and temperature data on the molten steel in the mold; calculating, by on-line real-time system, a molten steel flow index based on the estimated flow state of the molten steel, the molten steel flow index being a factor of mixing of an impurity into a casting inside the mold; and controlling the operation condition of the continuous casting machine such that the calculated molten steel flow index is within an appropriate range.

Abstract: An on-vehicle device is provided with a fuse. A plurality of terminals each have a long- plate shape and are aligned with each other. A fusible portion is connected to two of the plurality of terminals. A housing covers a part of the plurality of terminals and the fusible portion and has heat resistance equal to or higher than 300 degrees. Current flows through the fusible portion. The fusible portion is blown out in the case where the temperature of the fusible portion exceeds a predetermined temperature.

Abstract: An operation guidance method includes: predicting a state in a blast furnace when a current operation state is retained in a future, by using a physical model that is able to calculate the state in the blast furnace; and displaying, on an output device, an oxygen balance in a raceway region, a carbon balance in an entire furnace, and an oxygen balance derived from iron oxide in the entire furnace, when the state in the blast furnace is predicted.

Abstract: A device includes: an input device configured to receive an input of measurement results of a temperature and components of molten steel in a tundish of continuous casting facilities, measurement results of a width, a thickness, and a casting speed of a cast slab casted in the continuous casting facilities, and molten steel flow rate distribution in a mold; a model database configured to store a model expression and a parameter related to solidification reaction of molten steel in the mold; a convertor configured to convert a molten steel flow rate in the mold into a heat conductivity parameter; and a calculator configured to estimate a solidified shell thickness in the mold based on temperature distribution of the mold and steel in the mold calculated by solving a three-dimensional transient heat conduction equation using the measurement results.

Abstract: A method for controlling a hot metal temperature, includes: a first control loop for calculating a target value of pulverized coal ratio such that a hot metal temperature, predicted by a physical model that is able to calculate conditions inside a blast furnace, falls within a preset target range; and a second control loop for calculating pulverized coal flow rate manipulation quantity to compensate for a deviation between the pulverized coal ratio target value and a current pulverized coal ratio actual value.

Abstract: A breakout prediction method includes: a step of inputting a dimension of a solid product withdrawn from a mold in a continuous casting machine; a step of detecting a temperature of the mold by a plurality of thermometers embedded in the mold; a step of executing interpolation processing on the detected temperatures detected by the plurality of thermometers according to the dimension of the solid product; a step of calculating, based on the temperatures calculated by executing the interpolation processing, a component in a direction orthogonal to an influence coefficient vector obtained by principal component analysis as a degree of deviation from during a normal operation in which a breakout has not occurred; and a step of predicting a breakout based on the degree of deviation.