Abstract: A measuring device for snow flux and accumulated snow density at different heights, which comprises a shell, a plurality of collection devices and a support frame, the first side of the shell is provided with a plurality of collection ports along the height direction of the shell; each collection device comprises a collection pipe, a storage pipe and a fixed bolt, the first end of the collection pipe is horizontally arranged, the first end of one collection pipe is arranged in one collection port, both the second end of the collection pipe and the storage pipe are obliquely arranged downwards, the second end of the collection pipe and the first end of the storage pipe are detachably connected and communicate with each other; and the shell is detachably connected with the support frame.

Abstract: A measuring device for snow flux and accumulated snow density at different heights, which comprises a shell, a plurality of collection devices and a support frame, the first side of the shell is provided with a plurality of collection ports along the height direction of the shell; each collection device comprises a collection pipe, a storage pipe and a fixed bolt, the first end of the collection pipe is horizontally arranged, the first end of one collection pipe is arranged in one collection port, both the second end of the collection pipe and the storage pipe are obliquely arranged downwards, the second end of the collection pipe and the first end of the storage pipe are detachably connected and communicate with each other; and the shell is detachably connected with the support frame.

Abstract: The present disclosure provides a method and system for calculating aerodynamic force of a wind turbine airfoil under different turbulence intensities. The method of the present disclosure includes: calculating a lift coefficient and a drag coefficient according to measured wind pressure, performing function fitting to obtain a fitted lift coefficient model and a fitted drag coefficient model at the different turbulence intensities, and selecting a corresponding fitted lift coefficient model and drag coefficient model according to a turbulence intensity on a wind turbine to be measured, to directly calculate a lift coefficient and a drag coefficient for the aerodynamic force of the airfoil.

Abstract: The present disclosure provides an alert method and device in a pet pulling piece, which comprises: when the tension data value of the pet pulling leash is at a security level, enabling a security level alert mode including indicator light alert in which the indicator light emits in green; when the tension data value of the pet pulling leash is at an alarm level, enabling an alarm alert mode including a combination of indicator light, vibration, and sound in which the indicator light emits in yellow, the sound is soft, and the vibration is moderate; and when the tension data value of the pet pulling leash is at a danger level, enabling a danger alert mode including a combination of indicator light, vibration, and sound in which the indicator light emits in red, the sound is urgent, and the vibration is intense, while sending an ultrasound alarm to the pet.