Abstract: A cutting tool has a cutting bite, a power path, and a housing. The cutting bite includes a cutting edge, a shank that holds the cutting edge, and a sensor attached to the shank. The power path has a first terminal connected to the cutting bite and a second terminal opposite to the first terminal, and supplies power to the sensor. The housing accommodates a battery that stores power to be supplied to the power path, and is connected to the second terminal.

Abstract: A machining condition management system includes: a cutting tool that includes a cutting edge and a sensor; a storage that stores a mechanical machining condition and a measurement value; and a processor that performs revision of the mechanical machining condition based on the mechanical machining condition and the measurement value stored in the storage. The processor determines a load on the cutting tool based on the measurement value in a first cutting process under the mechanical machining condition, calculates a revised value for revising the mechanical machining condition for at least one machining interval that has fulfilled a prescribed condition in the determination for the first cutting process, and updates the mechanical machining condition in a second cutting process, based on the calculated revised value, and outputs the mechanical machining condition in the second cutting process.

Abstract: A cutting tool includes a body portion having a bar shape extending from a first end, which is an end on a side where a cutting tip for cutting the workpiece is placed, to a second end, which is an end opposite to the first end, and a sensor unit arranged on a surface of the body portion. The sensor unit includes a first sensor arranged on the surface of the body portion to detect a first physical quantity of the body portion, a board arranged on the surface of the body portion and electrically connected to the first sensor, a wireless communication unit mounted on the board and transmitting a signal containing information on the first physical quantity detected by first sensor to the outside, and a battery arranged in body portion and electrically connected to the board. The first sensor is closer to first end than battery.

Abstract: A cutting tool includes a body portion having a bar shape extending from a first end to a second end, and a sensor unit arranged on a surface of the body portion. The surface of the body portion includes a first surface, a second surface, and a third surface. The sensor unit includes a first strain sensor arranged on any of the first surface, the second surface, and the third surface, a board module electrically connected to the first strain sensor, and a wireless communication unit mounted on the board module and transmitting a signal containing information on strain of the body portion detected by the first strain sensor to the outside. The board module includes a first portion arranged on the first surface, a second portion arranged on the second surface, and a connecting portion electrically connecting the first portion to the second portion.

Abstract: A relay drive control device is configured to control drive of a relay for connecting a battery mounted on a vehicle and an external power supply. The relay drive control device includes a controller configured to, when driving the relay, supply an output voltage of the battery to the relay after increasing the output voltage to a voltage value at which the relay is drivable.

Abstract: A relay drive control device is configured to control drive of a relay for connecting a battery mounted on a vehicle and an external power supply. The relay drive control device includes a controller configured to, when driving the relay, supply an output voltage of the battery to the relay after increasing the output voltage to a voltage value at which the relay is drivable.

Abstract: A vehicle includes an electrical component electrically connected to a transmission path of supply electric power, a temperature sensor configured to detect a temperature of the electrical component, a control device configured to suppress the supply electric power when the temperature detected by the temperature sensor is equal to or higher than a threshold temperature, as compared with a case where the temperature detected by the temperature sensor is lower than the threshold temperature. The control device is configured to lower the threshold temperature when the external charging is executed again after the external charging is stopped, as compared with a case before the external charging is stopped.

Abstract: A charging system includes: a main battery storing electric power for a vehicle to travel; an inlet connected to a charging connector; a charging relay that switches a path of electric power from the inlet to the main battery; a converter that steps down a voltage of the electric power from the inlet; and an ECU that controls the charging relay and the converter. The ECU: controls the converter so that the converter starts stepping down the voltage of the electric power from the inlet to the auxiliary voltage after receiving the electric power from the inlet; supplies, before the charging relay switches to the connected state, the charging relay with the electric power from the converter as operating power for switching to the connected state; and controls the charging relay so that the charging relay switches from the disconnected state to the connected state, using the operating power.

Abstract: A rotating tool according to an aspect of the present disclosure is a rotating tool used in a state held by a tool holder, and the rotating tool includes a shaft portion having an end attached to the tool holder, a blade attaching portion or a blade portion provided at an end of the shaft portion opposite to the end, and a plurality of sensors attached to the shaft portion, and the plurality of sensors include an acceleration sensor and a strain sensor.