A shock testing apparatus comprising: an impact table for supporting an object to be tested; a tank; at least one float; one or more airguns; wherein the at least one float is arranged to float upon a fluid held within the tank and is movable within the tank to impact the impact table in response to the firing of the one or more airguns.

Provided is an ice avalanche-type glacial lake outburst surge generation and height measurement device. A glacial lake outburst test device includes a glacial lake simulation module and an ice avalanche surge module. An impact path, an impact angle, an impact scale, an impact velocity and a landslide density of an ice avalanche slider are controlled by simulation means. During formation of ice avalanche surges, the ice avalanche slider rushes into the glacial lake at a high speed, an ice avalanche pushes water to move in a sliding direction, thus forming a first surge, then continues to move to the bottom of the lake under the inertia and discharges a certain amount of water at its back. Movement of the landslide drives surrounding water to converge quickly into the back area, thus forming a second surge. Surge waves evolve around with a water entry point as a center.

Provided is an ice avalanche-type glacial lake outburst surge generation and height measurement device. A glacial lake outburst test device includes a glacial lake simulation module and an ice avalanche surge module. An impact path, an impact angle, an impact scale, an impact velocity and a landslide density of an ice avalanche slider are controlled by simulation means. During formation of ice avalanche surges, the ice avalanche slider rushes into the glacial lake at a high speed, an ice avalanche pushes water to move in a sliding direction, thus forming a first surge, then continues to move to the bottom of the lake under the inertia and discharges a certain amount of water at its back. Movement of the landslide drives surrounding water to converge quickly into the back area, thus forming a second surge. Surge waves evolve around with a water entry point as a center.

The present invention belongs to the technical field of movement monitoring, and provides a video monitoring apparatus and method for an operating state of a wave maker. When the operating state of the wave maker is monitored, an image collected by a camera is subjected to mark point detection and a central position is computed. Then, the position of each mark point is tracked in a dynamic video; and the operating condition of each wave paddle is assessed according to the motion state of the mark point. In the present invention, operating monitoring of the wave paddle is independent of a wave making control system, and the operating condition of the wave paddle is monitored in real time through a non-contact image measurement mode. The wave paddle is identified through LED; the positions of the mark points in each frame image are acquired through image perspective correction and binarization analysis; and the operating state of the wave paddle is judged according to the contrast among the mark points at different times and different spatial positions, thereby effectively reducing an error rate of the wave making control system for the operating monitoring of the wave paddle and greatly increasing experimental efficiency of simulating wave making.

The present invention belongs to the technical field of movement monitoring, and provides a video monitoring apparatus and method for an operating state of a wave maker. When the operating state of the wave maker is monitored, an image collected by a camera is subjected to mark point detection and a central position is computed. Then, the position of each mark point is tracked in a dynamic video; and the operating condition of each wave paddle is assessed according to the motion state of the mark point. In the present invention, operating monitoring of the wave paddle is independent of a wave making control system, and the operating condition of the wave paddle is monitored in real time through a non-contact image measurement mode. The wave paddle is identified through LED; the positions of the mark points in each frame image are acquired through image perspective correction and binarization analysis; and the operating state of the wave paddle is judged according to the contrast among the mark points at different times and different spatial positions, thereby effectively reducing an error rate of the wave making control system for the operating monitoring of the wave paddle and greatly increasing experimental efficiency of simulating wave making.

The invention relates to a method for the numerical measurement of at least one flow-related characteristic of a profile section of a rotating profile body, around which fluid can flow, by means of a numerical flow simulation which is executed on a data-processing system and which calculates a fluid-based flow around the profile section by means of multi-dimensional computational meshes, wherein the method comprises the following steps: providing a numerical flow simulation which can be executed on a data-processing system and which is configured such that the flow velocity of the far field of the numerical flow simulation is set to zero and, instead, a lattice movement of the multi-dimensional computational mesh is performed with a translational velocity in the profile section plane, such that the relative velocity yields the incident-flow velocity of the profile section at a given angle of attack, the symmetry boundary conditions for the edges of the multi-dimensional computational mesh are set to a translationally periodic boundary condition, and the velocity component, resulting from the velocity field of the rotational movement on the edge of the profile section, in the normal direction with respect to the profile section plane are taken into consideration in the inertial terms of the balance equations of the numerical flow simulation, executing the numerical flow simulation as provided above in order to numerically measure and obtain the at least one flow-related characteristic of the profile section.

The invention relates to a method for the numerical measurement of at least one flow-related characteristic of a profile section of a rotating profile body, around which fluid can flow, by means of a numerical flow simulation which is executed on a data-processing system and which calculates a fluid-based flow around the profile section by means of multi-dimensional computational meshes, wherein the method comprises the following steps: providing a numerical flow simulation which can be executed on a data-processing system and which is configured such that the flow velocity of the far field of the numerical flow simulation is set to zero and, instead, a lattice movement of the multi-dimensional computational mesh is performed with a translational velocity in the profile section plane, such that the relative velocity yields the incident-flow velocity of the profile section at a given angle of attack, the symmetry boundary conditions for the edges of the multi-dimensional computational mesh are set to a translationally periodic boundary condition, and the velocity component, resulting from the velocity field of the rotational movement on the edge of the profile section, in the normal direction with respect to the profile section plane are taken into consideration in the inertial terms of the balance equations of the numerical flow simulation, executing the numerical flow simulation as provided above in order to numerically measure and obtain the at least one flow-related characteristic of the profile section.

A gentle start-up device includes: a rotational type hollow pipe body, including an inlet and an outlet, and having an inner wall provided with a plurality of bar-shaped fins; a transmission unit, physically connected to the rotational type hollow pipe body; and a driving unit, physically connected to the transmission unit for driving the transmission unit to rotate the rotational type hollow pipe body in a rotational direction and to achieve a predetermined rotational speed according to a water supply flow value of a water turbine of a hydraulic generator set, whereby water flow which passes through the rotational type hollow pipe body generates rotational flow.

A gentle start-up device includes: a rotational type hollow pipe body, including an inlet and an outlet, and having an inner wall provided with a plurality of bar-shaped fins; a transmission unit, physically connected to the rotational type hollow pipe body; and a driving unit, physically connected to the transmission unit for driving the transmission unit to rotate the rotational type hollow pipe body in a rotational direction and to achieve a predetermined rotational speed according to a water supply flow value of a water turbine of a hydraulic generator set, whereby water flow which passes through the rotational type hollow pipe body generates rotational flow.

A system and method for a hose with degradation monitoring is disclosed. The system includes a sensor having one or more first alignment features, a contactless switch, and a light transmitter configured to transmit a light transfer protocol. A gateway device is configured to wirelessly receive data from the sensor, and includes one or more second alignment features that are configured to align with the one or more first alignment features, a trigger configured to activate the contactless switch only when the one or more second alignment features are aligned with the one or more first alignment features, and a phototransistor configured to capture and record the light transfer protocol transmitted from the light transmitter.