Abstract: A sheet detection device includes a measurement unit for measuring a feature amount of a sheet conveyed by a conveyance unit, a pressing member movable between a first position separated from the measurement unit and a second position closer to the measurement unit than the first position, and a moving unit configured to move the pressing member, wherein the pressing member is arranged by the moving unit at the first position in a case where the measurement unit detects that the sheet has not been conveyed to a measurement position of the measurement unit, wherein the moving unit is configured to move the pressing member from the first position to the second position in a case where the measurement unit detects that the sheet has been conveyed to the measurement position of the measurement unit.

Abstract: A sheet detection device includes a measurement unit configured to measure a sheet, and a power supply voltage controller configured to control supply of a power supply voltage to the measurement unit, wherein the power supply voltage controller is configured to start supplying the power supply voltage to the measurement unit when receiving a notification indicating that a mode for performing sheet measurement is set.

Abstract: A sheet detection device includes a measurement unit for measuring a feature amount of a sheet conveyed by a conveyance unit, a pressing member movable between a first position separated from the measurement unit and a second position closer to the measurement unit than the first position, and a moving unit configured to move the pressing member, wherein the pressing member is arranged by the moving unit at the first position in a case where the sheet has not been conveyed by the conveyance unit to a measurement position of the measurement unit, wherein the moving unit is configured to move the pressing member to the second position from the first position in a case where the sheet has been conveyed by the conveyance unit to the measurement position of the measurement unit.

Abstract: An image forming apparatus includes a conveyance unit configured to convey a sheet, a measurement unit for measuring a feature amount of the sheet conveyed by the conveyance unit, a sheet detection sensor for detecting the sheet conveyed by the conveyance unit, a pressing member movable between a first position separated from the measurement unit and a second position closer to the measurement unit than the first position, a moving unit configured to move the pressing member, an image forming unit configured to form, based on a predetermined image forming condition, an image on the sheet conveyed by the conveyance unit, and a controller, the controller is configured to stop conveyance of the sheet by the conveyance unit in a case where the sheet is detected by the sheet detection sensor.

Abstract: A control unit of a fuel cell system opens a second valve at the time of closing a first valve, and maintains the same operating state of a compressor before closing the first valve and after opening the second valve.

Abstract: A control unit of a fuel cell system estimates an amount of nitrogen in an anode flow field, performs a first comparison by comparing the estimated amount of nitrogen with a first threshold amount, performs a second comparison by comparing a target power generation amount as a target amount of power generation by a fuel cell stack with a second threshold amount in a case where the estimated amount of nitrogen in the anode flow field exceeds the first threshold amount in the first comparison, and controls opening and closing of a first valve and opening and closing of the second valve based on a result of the first comparison and a result of the second comparison.

Abstract: A control unit of a fuel cell system measures or estimates an amount of nitrogen in an anode flow field, performs a first comparison by comparing the amount of nitrogen with the first threshold amount, performs a second comparison by comparing a differential pressure calculated by subtracting a cathode pressure value indicating a pressure inside a cathode flow field from an anode pressure value indicating a pressure inside the anode flow field with the second threshold pressure when the amount of nitrogen in the anode flow field is greater than the first threshold amount in the first comparison, and controls opening and closing of a valve based on the result of the first comparison and the result of the second comparison.