Abstract: An electric power supply device supplies electric power to a work machine having an electric power source. The electric power supply device includes a fuel cell different from the electric power source and an electric power connecting section for transferring electric power between the electric power source and the electric power supply device. A control device for controlling the electric power supply device includes a rated capability obtaining section for obtaining the information indicating the rated value of the charge and discharge capability of the electric power source of the work machine in response to the electric power supply device being mounted in the work machine or the electric power supply device being able to utilize the electric power of the electric power source, and an operating condition determining section for determining the operating condition of the electric power supply device based on the rated value.

Abstract: An electric power supply device supplies electric power to a work machine having an electric power source. The electric power supply device includes a fuel cell different from the electric power source and an electric power connecting section for transferring electric power between the electric power source and the electric power supply device. A control device for controlling the electric power supply device includes a rated capability obtaining section for obtaining the information indicating the rated value of the charge and discharge capability of the electric power source of the work machine in response to the electric power supply device being mounted in the work machine or the electric power supply device being able to utilize the electric power of the electric power source, and an operating condition determining section for determining the operating condition of the electric power supply device based on the rated value.

Abstract: A photographic image exchange system includes an imaging device having an imager that performs imaging, a communicator that performs communication with a server, and a controller that controls the communicator such that an image that includes a registered target among images captured by the imager is transmitted to the server, and the server provides the image received from the imaging device to a device used by a user who is related to the registration.

Abstract: During travel of the electric vehicle, the charging arm is extended in the vehicle width direction, a positive electrode overhead line of the power supply device and a positive electrode power reception unit of the charging arm are brought into contact at the same time that a negative electrode overhead line of the power supply device and a negative electrode power reception unit of the charging arm are brought into contact, and a power storage device for driving the electric vehicle is charged. A charging head that is the tip section of the charging arm is held within a V-shaped groove to which the positive electrode overhead line and the negative electrode overhead line are attached, thereby minimizing the loss of contact even if the charging arm shakes in the vertical direction as a result of the condition of the road surface, brake operation, or the like.

Abstract: A photographic image replacement system includes an imaging device having an imager that performs imaging, a communicator that performs communication with a server, and a controller that controls the communicator such that an image that includes a registered target among images captured by the imager is transmitted to the server, and the server provides the image received from the imaging device to a device used by a user who is related to the registration.

Abstract: During travel of the electric vehicle, the charging arm is extended in the vehicle width direction, a positive electrode overhead line of the power supply device and a positive electrode power reception unit of the charging arm are brought into contact at the same time that a negative electrode overhead line of the power supply device and a negative electrode power reception unit of the charging arm are brought into contact, and a power storage device for driving the electric vehicle is charged. A charging head that is the tip section of the charging arm is held within a V-shaped groove to which the positive electrode overhead line and the negative electrode overhead line are attached, thereby minimizing the loss of contact even if the charging arm shakes in the vertical direction as a result of the condition of the road surface, brake operation, or the like.

Abstract: Even when a high voltage in electric railways is applied from power lines, an electric automobile makes it possible to apply an appropriate voltage lower than the high voltage to a motor and an inverter that supplies the motor with electric power. The electric automobile includes, a first DC/DC converter that steps up the battery voltage of a high-voltage battery to a level corresponding to an power line feeding voltage, a second converter connected between power line contact terminals, which are brought into contact with power lines to receive electric power from the power lines under the high power line feeding voltage, and the DC terminals of the inverter for energizing the motor. Therefore, even if the high power line feeding voltage is applied from the power lines, the second DC/DC converter functions as an electric damping device to prevent the high voltage from being applied to the inverter.

Abstract: Even when a high voltage in electric railways is applied from power lines, an electric automobile makes it possible to apply an appropriate voltage lower than the high voltage to a motor and an inverter that supplies the motor with electric power. The electric automobile includes, a first DC/DC converter that steps up the battery voltage of a high-voltage battery to a level corresponding to an power line feeding voltage, a second converter connected between power line contact terminals, which are brought into contact with power lines to receive electric power from the power lines under the high power line feeding voltage, and the DC terminals of the inverter for energizing the motor. Therefore, even if the high power line feeding voltage is applied from the power lines, the second DC/DC converter functions as an electric damping device to prevent the high voltage from being applied to the inverter.

Abstract: An apparatus includes a gas sensor configured to detect a specific gas which is a subject for detection, and inspection gas introduction piping configured to lead an inspection gas to the gas sensor, wherein at least a portion of the inspection gas introduction piping serves as ventilating piping configured to ventilate an inside of a ventilation-requiring device.

Abstract: An apparatus includes a gas sensor configured to detect a specific gas which is a subject for detection, and inspection gas introduction piping configured to lead an inspection gas to the gas sensor, wherein at least a portion of the inspection gas introduction piping serves as ventilating piping configured to ventilate an inside of a ventilation-requiring device.