Abstract: In a case of a normal operation, a battery controller (22) assumes a normal operation mode and permits charging and discharging of a battery module (21). Upon receiving a discharge command from a vehicle body controller (17) for completely discharging the battery module (21), the battery controller (22) assumes a discharge mode to discharge the battery module (21) to reach a safe voltage level and store discharge information. Upon reading out the discharge information, the battery controller (22) assumes a discharge prohibition mode to prohibit charging and discharging of the battery module (21).

Abstract: A first RF pulse signal includes a plurality of main cycles. Each main cycle includes first and second durations. The first duration includes a plurality of first sub cycles, and the second duration includes a plurality of second sub cycles. The first RF pulse signal has three or more different power levels in each of the plurality of first sub cycles and the plurality of second sub cycles. A second RF pulse signal including a plurality of main cycles. The second RF pulse signal has two or more different power levels in each of the plurality of first sub cycles and a zero power level in the second duration. A third RF pulse signal includes a plurality of main cycles. The third RF pulse signal has two or more different power levels in each of the plurality of first sub cycles and a zero power level in the second duration.

Abstract: Provided is an unmanned aircraft which is capable of stably taking off. In one example, the unmanned aircraft has an aircraft body which includes an information acquisition device, a plurality of rotary wings, and a protective member disposed around the rotary wings. Each of the rotary wings has a rotation axis which is tilted with respect to a vertical direction by a given angle, such that the rotary wings generate a forward thrust force. The aircraft body has a lower edge which includes a middle lower edge and a forward lower edge, wherein the protective member has a lower edge including the forward lower edge. The forward lower edge is located above the middle lower edge, and the forward lower edge has a rear end located backward of a rear end of the rotary wing.

Abstract: Provided is an unmanned aircraft which is capable of stably taking off. In one example, the unmanned aircraft has an aircraft body which includes an information acquisition device, a plurality of rotary wings, and a protective member disposed around the rotary wings. Each of the rotary wings has a rotation axis which is tilted with respect to a vertical direction by a given angle, such that the rotary wings generate a forward thrust force. The aircraft body has a lower edge which includes a middle lower edge and a forward lower edge, wherein the protective member has a lower edge including the forward lower edge. The forward lower edge is located above the middle lower edge, and the forward lower edge has a rear end located backward of a rear end of the rotary wing.

Abstract: A battery excavator 1 as an electric powered working machine includes a secondary battery 201, a battery management unit 202 that manages the secondary battery 201, and a controller 300 that controls a normal charge or a diagnostic charge for the secondary battery 201. The controller 300 includes: a diagnostic charge recommendation determination unit 301 that determines whether to recommend the diagnostic charge or not based on an operation history of the secondary battery output from the battery management unit 202; and a diagnostic charge execution determination unit 302 that determines whether to execute the diagnostic charge or not based on a state of the secondary battery output from the battery management unit 202, an estimated charge period necessary for the diagnostic charge, and a site work plan including a work start time, when the diagnostic charge is determined to be recommended.

Abstract: In a case of a normal operation, a battery controller (22) assumes a normal operation mode and permits charging and discharging of a battery module (21). Upon receiving a discharge command from a vehicle body controller (17) for completely discharging the battery module (21), the battery controller (22) assumes a discharge mode to discharge the battery module (21) to reach a safe voltage level and store discharge information. Upon reading out the discharge information, the battery controller (22) assumes a discharge prohibition mode to prohibit charging and discharging of the battery module (21).

Abstract: Provided are a device configuration, method, etc. for performing imaging investigation in an investigation space using an unmanned aerial vehicle. A system includes: a flight start platform; the vehicle which is connected to a line-type member and equipped with an investigation camera, a travel-direction imaging camera, and a vehicle-side communication unit; an external control device which is equipped with a display unit and an external control device-side communication unit, and which receives the travel-direction image data through the external control device-side communication unit, receives an input of control commands for the vehicle while having a video or still image obtained from the travel-direction image data displayed on the display unit, and transmits a signal indicating the control commands from the external control device-side communication unit; and an attraction device which is connected to the line-type member and attracts the vehicle.

Abstract: A relay (25) connects and disconnects an electrical circuit to which an inverter (16) and an electricity storage device (19) are connected. A BCU (22) controls the electricity storage device (19). An HC (27) controls an electric motor (15), the inverter (16) and the BCU (22). The HC (27) and the BCU (22) respectively have FET switches (30, 31) for controlling supply and stop of the excitation current in the relay (25). When the electricity storage device (19) is determined to be in an abnormal state, the BCU (22) transmits an abnormal signal to the HC (27), and when a predetermined time has elapsed, turns off (opens) the first FET switch (30) of the BCU (22). The HC (27) executes stop processing based upon the abnormal signal received from the BCU (22) and then turns off (opens) the second FET switch (31) of the HC (27).

Abstract: A main controller and a hybrid controller control an engine, an assist generator motor, a hydraulic pump and an electricity storage device. In this case, the hybrid controller is provided with a performance state recovery part that performs performance state recovery of the electricity storage device. In a case where a performance state amount varying with repetition of a discharge and a charge of the electricity storage device, specifically, a current integrated value ratio of the electricity storage device goes beyond a predetermined threshold value (L1%), the performance state recovery part limits power of the hydraulic pump. Thereby, the performance state recovery part performs the performance state recovery of the electricity storage device.

Abstract: An engine cooling system (22) includes an engine (11), an engine cooling pipe line (23), an engine water pump (24) and an engine radiator (25). An electricity storage device cooling system (27) includes an electricity storage device (19), an electricity storage device cooling pipe line (28), an electricity storage device water pump (29) and an electricity storage device radiator (31). Different heat-transfer media (engine cooling water and electricity storage device cooling water) flow respectively in the engine cooling system (22) and the electricity storage device cooling system (27). Further, a heating heat exchanger (32) is provided in the halfway of the engine cooling pipe line (23) and in the halfway of the electricity storage device cooling pipe line (28) for performing heat exchange between the engine cooling water and the electricity storage device cooling water.

Abstract: A storage battery (21) is configured of a plurality of cells (22A) to (22N) series-connected to each other. A battery controller (27) receives power supplied from a lead battery (31). The battery controller (27) executes balancing control that reduces variation in cell voltages (VcA) to (VcN) of the plurality of cells (22A) to (22N). The battery controller (27) executes the balancing control in a time range during which a voltage of the lead battery (31) becomes equal to or more than a predetermined given voltage value (V1) and a charging rate of the storage battery (21) becomes equal to or more than a predetermined given charging rate value (SOC1) after a key switch (16) is switched from an on state to an off state.

Abstract: A main controller and a hybrid controller control an engine, an assist generator motor, a hydraulic pump and an electricity storage device. In this case, the hybrid controller is provided with a performance state recovery part that performs performance state recovery of the electricity storage device. In a case where a performance state amount varying with repetition of a discharge and a charge of the electricity storage device, specifically, a current integrated value ratio of the electricity storage device goes beyond a predetermined threshold value (L1%), the performance state recovery part limits power of the hydraulic pump. Thereby, the performance state recovery part performs the performance state recovery of the electricity storage device.

Abstract: The objective of the present invention is to provide a device configuration, a method and the like for performing an imaging survey within a survey space using an unmanned aerial vehicle. Provided is an unmanned aerial vehicle provided with at least four rotating blades, and a control unit which controls the rotation of the at least four rotating blades, wherein the unmanned aerial vehicle is provided with a survey camera in a position on a chassis of the unmanned aerial vehicle, between at least one rotating blade positioned on the side in the direction of travel, from among the at least four rotating blades, and at least one rotating blade positioned on the opposite side to the direction of travel, and wherein, when flying above a surface in which a liquid is at least partially present, the unmanned aerial vehicle flies while at least partially preventing scattered liquid from reaching above the chassis by means of the at least four rotating blades.

Abstract: Provided are a device configuration, method, etc. for performing imaging investigation in an investigation space using an unmanned aerial vehicle. A system includes: a flight start platform; the vehicle which is connected to a line-type member and equipped with an investigation camera, a travel-direction imaging camera, and a vehicle-side communication unit; an external control device which is equipped with a display unit and an external control device-side communication unit, and which receives the travel-direction image data through the external control device-side communication unit, receives an input of control commands for the vehicle while having a video or still image obtained from the travel-direction image data displayed on the display unit, and transmits a signal indicating the control commands from the external control device-side communication unit; and an attraction device which is connected to the line-type member and attracts the vehicle.

Abstract: An engine cooling system (22) includes an engine (11), an engine cooling pipe line (23), an engine water pump (24) and an engine radiator (25). An electricity storage device cooling system (27) includes an electricity storage device (19), an electricity storage device cooling pipe line (28), an electricity storage device water pump (29) and an electricity storage device radiator (31). Different heat-transfer media (engine cooling water and electricity storage device cooling water) flow respectively in the engine cooling system (22) and the electricity storage device cooling system (27). Further, a heating heat exchanger (32) is provided in the halfway of the engine cooling pipe line (23) and in the halfway of the electricity storage device cooling pipe line (28) for performing heat exchange between the engine cooling water and the electricity storage device cooling water.

Abstract: A management server (52) receives a maximum value and a minimum value of the respective voltages (cell voltages) in a plurality of battery cells (19A, 19A) configuring an electricity storage device (19) of a hydraulic excavator (1) from the hydraulic excavator (1), and stores the maximum value and the minimum value in a storage device (52A). Discharge characteristics of the electricity storage device (19) are stored in the storage device (52A) in the management server (52). A battery state estimation calculating unit (52D) in the management server (52) calculates an estimation maximum value and an estimation minimum value of cell voltages in the present or in the future by adding the discharge characteristics stored in the storage device (52A) to the latest maximum value and the latest minimum value of the cell voltages stored in the storage device (52A).

Abstract: A storage battery (21) is configured of a plurality of cells (22A) to (22N) series-connected to each other. A battery controller (27) receives power supplied from a lead battery (31). The battery controller (27) executes balancing control that reduces variation in cell voltages (VcA) to (VcN) of the plurality of cells (22A) to (22N). The battery controller (27) executes the balancing control in a time range during which a voltage of the lead battery (31) becomes equal to or more than a predetermined given voltage value (V1) and a charging rate of the storage battery (21) becomes equal to or more than a predetermined given charging rate value (SOC1) after a key switch (16) is switched from an on state to an off state.

Abstract: A relay (25) connects and disconnects an electrical circuit to which an inverter (16) and an electricity storage device (19) are connected. A BCU (22) controls the electricity storage device (19). An HC (27) controls an electric motor (15), the inverter (16) and the BCU (22). The HC (27) and the BCU (22) respectively have FET switches (30, 31) for controlling supply and stop of the excitation current in the relay (25). When the electricity storage device (19) is determined to be in an abnormal state, the BCU (22) transmits an abnormal signal to the HC (27), and when a predetermined time has elapsed, turns off (opens) the first FET switch (30) of the BCU (22). The HC (27) executes stop processing based upon the abnormal signal received from the BCU (22) and then turns off (opens) the second FET switch (31) of the HC (27).

Abstract: Hybrid construction machinery has a power storage apparatus that can be warmed up quickly and has a lengthened life. The machinery includes an electric motor assisting a prime mover in power and generating electric power. The power storage apparatus transfers electric power to and from the electric motor. A warm-up circuit circulates a warming medium in the vicinity of the power storage apparatus, and a control device controls circulation of the warming medium. On-board equipment state detection units detect on-board equipment states to estimate an output request for the power storage apparatus from the on-board equipment. Circulation of the warming medium is controlled based on a temperature of the power storage apparatus and a determination temperature for determining whether to circulate the warming medium in the warm-up circuit. The control device further varies the determination temperature according to a result of detection by the on-board equipment state detection units.

Abstract: A motor generator (27) is connected mechanically to an engine (21) and a hydraulic pump (23). The hydraulic pump (23) delivers pressurized oil to cylinders (11D) to (11F) in a working mechanism (11), a traveling hydraulic motor (25) and a revolving hydraulic motor (26). The revolving hydraulic motor (26) drives a revolving device (3) in cooperation with a revolving electric motor (33). The motor generator (27) and the revolving electric motor (33) are connected electrically to an electricity storage device (31). An HCU (36) sets a target electricity storage rate (SOC0) of the electricity storage device (31) and a pump output limit (POL0) of the hydraulic pump (23) corresponding to a mode selected by a mode selection device (38). The HCU (36) controls the engine (21), the motor generator (27), the revolving electric motor (33) and the electricity storage device (31) corresponding to the target electricity storage rate (SOC0) and the pump output limit (POL0).