3results about How to "No weight gain" patented technology

This invention relates to the field of unmanned aerial vehicle (UAV) technology and discloses a pesticide spraying UAV, including a frame with a rotor assembly, a pesticide tank and a spraying assembly connected to the pesticide tank mounted on the frame, the pesticide tank including a storage section, a drive section, and a pump body, a pressure plate slidably connected inside the storage section, the drive section including a connecting plate mounted on the frame, a telescopic tube detachably connected to the connecting plate, the lower end of the telescopic tube detachably connected to the pressure plate, an elastic component between the pressure plate and the connecting plate, the pump body being connected to the bottom of the storage section via a water inlet pipe, and the pump body being connected to the telescopic tube via a water outlet pipe, the water outlet pipe having a water outlet valve, and a spraying pipe being located at the upper end of the telescopic tube, the spraying pipe being connected to the spraying assembly, the spraying pipe having a spraying valve. This invention has the following advantages and effects: the pesticide solution is always full in the storage section, and the pesticide solution in the telescopic tube is also always full, therefore, the pesticide solution will not fluctuate within the storage section and the telescopic tube, ensuring the stability of the UAV operation.

The utility model relates to land management technical field especially relates to a land sampling device for land management, is provided with screw sleeve through the rotation of the limiting ring, is equipped with driven gear on screw sleeve, is provided with lifting screw in screw sleeve internal thread, is connected sampling cylinder through the fixed piece that is composed of two fixed nuts and fixed screw below lifting screw, the conical surface that has below sampling cylinder extends to the inside of installation cylinder, sets up installation box above installation cylinder, is rotatably arranged with the driving gear that meshes with driven gear in installation box, driving gear rotates through the rotating disc. This manual operation mode avoids using motor and battery, will not make the device overall weight because motor and battery and substantially increase, also will not cause motor and battery short circuit fault because of rainy season rainwater infiltration, the whole structure guarantees sampling function at the same time, effectively overcomes the drawbacks of motor drive mode in outdoor use.

The application discloses an engine multi-vehicle type adaptive NVH quality optimization method and system, and belongs to the technical field of automobile engine debugging. The method comprises the following steps: after an engine is installed to a vehicle to be adapted, vehicle working condition data are collected in real time, the vehicle working condition data comprising a vehicle speed, a throttle opening degree, an engine speed, a gear position, a hydraulic torque converter locking state and an oil temperature signal; whether the engine enters a noise sensitive working condition is identified by comparing the vehicle working condition data with working conditions of the noise sensitive working condition; when the engine enters the noise sensitive working condition, an NVH control strategy embedded in an engine electronic control unit is activated; the NVH control strategy comprises adjusting an engine ignition angle and fuel injection parameters; the engine is controlled according to the ignition angle optimization control instruction and the fuel injection parameter optimization instruction; when the vehicle drives out of the working conditions of the noise sensitive working condition of the engine or gear shifting is completed, normal combustion control logic is restored. The method effectively reduces the in-cylinder pressure rise rate, thereby inhibiting structural knocking noise in the range of 150-600 Hz.