Abstract: A hydraulic system for a rotary implement, including an oil tank, a main pump, a control valve, and a rotary motor is provided. The oil tank is connected to an oil suction port of the main pump; an oil outlet of the main pump is connected to a P port of the control valve; a T port of the control valve is interconnected with the oil tank; and A and B ports of the control valve are connected to both ends of the rotary motor. The control valve includes a compensation valve connected to the P port and the T port, an electric proportional valve connected to the P port and the compensation valve, and an electromagnetic reversing valve connected to the compensation valve, the T port and the B port.

Abstract: The present disclosure provides a pilot proportional control valve apparatus, an automatic calibration method, engineering machinery and a storage medium, and relates to the technical field of engineering machinery, wherein the pilot proportional control valve apparatus including a hydraulic system and a controller; the hydraulic system including: a plurality of proportional pressure reducing valves, a calibration reversing valve, and a pressure sensor; the calibration reversing valve including a plurality of reversing units, an output end of each proportional pressure reducing valve being respectively connected with an input end of one corresponding reversing unit; the pressure sensor being arranged in a detection oil path; the controller performing calibration processing on the proportional pressure reducing valve according to a pilot oil detection pressure and an output pressure value of the proportional pressure reducing valve.

Abstract: The present disclosure relates to an excavator, a precise control method and system therefor, a vehicle terminal and a storage medium. The precise control method for the excavator comprises: presetting a plurality of work modes of the excavator, and an action rate and action coefficient corresponding to each working mode of the plurality of work modes; and performing work mode switching according to a handle input signal.

Abstract: The present disclosure relates to a method for establishing an electronic fence for an excavator, wherein the excavator includes a frame, a slewing platform rotatably mounted on the frame, a working arm mounted on the slewing platform in a pitching swinging manner, and a bucket rotatably mounted on the working arm. The working arm includes a first working arm hinged to the slewing platform and a second working arm hinged to the first working arm. An end, away from the first working arm, of the second working arm is hinged to the bucket.

Abstract: A hydraulic system for a rotary implement, including an oil tank, a main pump, a control valve, and a rotary motor is provided. The oil tank is connected to an oil suction port of the main pump; an oil outlet of the main pump is connected to a P port of the control valve; a T port of the control valve is interconnected with the oil tank; and A and B ports of the control valve are connected to both ends of the rotary motor. The control valve includes a compensation valve connected to the P port and the T port, an electric proportional valve connected to the P port and the compensation valve, and an electromagnetic reversing valve connected to the compensation valve, the T port and the B port.

Abstract: An icon displaying method and an electronic device are provided. The method is performed by the electronic device. The electronic device includes a device body and a stylus detachably connected to the device body. The method includes: obtaining a first working state of the stylus, where the first working state includes at least one of remaining power, a font color, or a font size of the stylus; and displaying an icon corresponding to the stylus based on the first working state.

Abstract: The present invention relates to a relay protective device, a construction machine, a relay protection control method and apparatus, and a computer readable storage medium.

Abstract: The present disclosure provides a pilot proportional control valve apparatus, an automatic calibration method, engineering machinery and a storage medium, and relates to the technical field of engineering machinery, wherein the pilot proportional control valve apparatus including a hydraulic system and a controller; the hydraulic system including: a plurality of proportional pressure reducing valves, a calibration reversing valve, and a pressure sensor; the calibration reversing valve including a plurality of reversing units, an output end of each proportional pressure reducing valve being respectively connected with an input end of one corresponding reversing unit; the pressure sensor being arranged in a detection oil path; the controller performing calibration processing on the proportional pressure reducing valve according to a pilot oil detection pressure and an output pressure value of the proportional pressure reducing valve.

Abstract: The present invention relates to a relay protective device, a construction machine, a relay protection control method and apparatus, and a computer readable storage medium.

Abstract: A seat adjusting structure includes a seat body. A damping force unit is installed at an upper end of the seat body, and a cab connecting plate is installed at a lower end of the seat body. An electronic controller and a seat weight sensor are installed between the damping force unit and the cab connecting plate. A rigidity unit and an operator presence indicator are installed at a lower part of the damping force unit, and a seat damper is installed above the cab connecting plate. The operator presence indicator detects whether an operator exists, while the seat weight sensor detects whether the weight of the operator is within a set range. The electronic controller receives detection signals from the operator presence indicator and the seat weight sensor and controls the damping force unit and the rigidity unit to adjust the rigidity and damping force of the seat damper.

Abstract: An icon displaying method and an electronic device are provided. The method is performed by the electronic device. The electronic device includes a device body and a stylus detachably connected to the device body. The method includes: obtaining a first working state of the stylus, where the first working state includes at least one of remaining power, a font color, or a font size of the stylus; and displaying an icon corresponding to the stylus based on the first working state.