Hengdian Group Tospo Lighting Co., Ltd.

Hangzhou Jianghe Hydro-Electrical Science & Technolo

Electronic University of Science & Technology of Hangzhou

Alibaba Group Holding Limited

Fang Wang

Liang Chen

Hu Fang

Yang Zhang

Jianfeng Yu

Yihui Feng

Qiaohuan Han

Jin Ouyang

Yinhua Chen

Liwei Chen

Changlu Liu

Yufei Zhu

Zhengming Zhou

Ming Jiang

Jianjun Xiao

Jingbiao Liu

Zefei Zhu

Shanguo Peng

Xiaoqing Tian

Junsheng Wei

Xueting Zhang

Xue Sun

Chunming Zhao

Yongzhen Cheng

Embodiments provide a method for geomagnetically detecting a submarine cable, including: performing a preliminary detection by controlling an underwater robot equipped with a proton magnetometer; determining a preliminary direction and location of the cable based on preliminary detection information; controlling the underwater robot equipped with the proton magnetometer and two fluxgate magnetometers to launch into the water; controlling the underwater robot to travel over the cable and determining specific location information of the cable; controlling a heading of the underwater robot to move along the preliminary direction of the cable; and controlling the underwater robot equipped with the proton magnetometer and the two fluxgate magnetometers to launch into the water; determining whether a fault in the submarine cable occurs and a location of a fault point, based on Z-axis components of the general geomagnetic field and launching depth data of the underwater robot.

Method for geomagnetically detecting submarine cable

The invention discloses a light adjustment and tone adjustment control circuit, which comprises a power supply circuit and a light adjustment circuit connected with the power supply circuit. An output end of the power supply circuit is connected with a first LED light source and a second LED light source. The two LED light sources are connected in series, and the tube pressure and color temperature of the first LED light source and the second LED light source are different; the invention also discloses a realization method of a light adjustment and tone adjustment control circuit. In the present invention, at least two LED light sources with different tube pressures and color temperatures are connected in series to form a whole light source, and the output current of the power supply circuit can be changed by the light adjustment circuit to realize light adjustment and tone adjustment, which has the characteristics of simple circuit design and low operating cost.

Control circuit for a light adjustment and a tone adjustment and an implementation method thereof

The present utility model discloses a downlight that belongs to the technical field of downlights and is suitable for embedded tubes of different specifications; the downlight includes a lamp cup; a drive board is arranged inside the lamp cup, and a light source board is arranged below the drive board; a lampshade is arranged below the lamp cup, and two symmetrically arranged mounts are arranged on the lamp cup; and a spring is rotatably embedded in the mount. The spring of the present utility model can be rotated in the mount along the transverse axle at the bottom of the installation bracket, so as to adjust the relative distance between the two springs, such that one downlight can be applied to the installed embedded tubes of different specifications, thereby saving the cost of manufacturers in inventory storage and reducing the models of downlights purchased by users; the present utility model uses a triangular limit block, which has a horizontal bottom face for limiting the spring and an inclined side face for installing the spring.

Downlight suitable for embedded tubes of different specifications

A tidal current generating unit, including a turbine, a hub, a generator, a bearing set and a fixed flange. The turbine is connected to the rotor of the generator through the hub, and the rotor is rotatably mounted on the outer circumference of the stator of the generator via the bearing set, and the turbine drives the rotating component to rotate to generate electricity. A density of a blade is much smaller than a density of the seawater, such that the blade has a sufficient buoyancy that offsets the gravity of the rotating component in seawater, and the load of the bearing sets is reduced. The blade is a backswept blade and the hydrodynamic central axis of the blade is inclined from a flange central axis of the blade at a first angle, and the blade is able to automatically change the pitch without relying on an external force.

Tidal current generating unit

Growing community of inventors

Zhejiang, China

Fang Wang