Beijing Hjimi Technology Co., Ltd

State Grid Corporation of China

Chinese Academy of Agricultural Sciences

State Grid Smart Grid Research Institute Co., Ltd.

Hang Wang

Shuo Li

Li Li

Xiaojun Zhou

Zan Sheng

Jin Zhang

Haitao Wang

Yunpeng Li

Jiandong Wang

Xurong Mei

Zhe Jiang

Yong Huang

Jinzhong Li

Chuanjuan Wang

Licheng Lu

Jianhui Zhou

Xuefeng Qiu

Shan Liu

Zehong Liu

Xianshan Guo

Xiangnan Li

Shaowu Wang

Shengli Song

Junyi Hou

Wenyi Dong

Baoqing Chen

Xiaoyang Liang

Chunhao Fang

A high-voltage bushing includes a conductive rod and an air cooling device. The conductive rod has an air channel therein, and the air channel includes an air inlet and an air outlet. The air cooling device includes at least one fan, and the fan is configured to output air flow, so as to blow the air flow into the air channel through the air inlet.

High-voltage bushing and high-voltage power transmission system

Provided are a control method and system for water and fertilizer under drip irrigation. In the method, the crop type, soil type, fertilizer type, water-fertilizer irrigation amount and other factors are coupled with the drip irrigation tape parameters in the drip irrigation system, and matching calculation is performed to obtain the fertilization duration. In addition, deduction and calculation are performed according to the solubility of the fertilizer, the fertilization amount, the rotation irrigation area and the fertilization duration determined by the self-allocation system, and the characteristic that the maximum fertilizer absorption amount is reached when the outlet of the Venturi fertilizer applicator is at −9 m is combined, so as to determine key components of the fertilizing machine in the drip irrigation system.

Control method and system for water and fertilizer under drip irrigation

This application provides a depth-map-based ground detection method and apparatus. The method includes: screening first sample points according to depth values of points in a current depth map; determining space coordinates of the first sample points, and determining space heights of the first sample points according to current gravity acceleration information and the space coordinates; screening second sample points in the first sample points according to the space heights; determining an optimal ground equation according to space coordinates of the second sample points; and determining a ground point in the depth map by using the optimal ground equation. Because the accuracy of the sample points that undergo secondary screening is high, the ground detection precision is high. Because this application is not excessively dependent on a depth value, the calculation complexity is low, and operation can be performed on various hardware.

Depth-map-based ground detection method and apparatus

A method of determining whether a ground is to be re-detected is provided. In an example, the method includes: an i-th gravitational acceleration vector corresponding to an i-th image frame is acquired from a collecting device; when the i-th gravitational acceleration vector changes relative to an (i&#x2212;1)-th gravitational acceleration vector corresponding to an (i&#x2212;1)-th image frame, a value is set to a flag bit of the i-th image frame; it is determined whether the collecting device tends to be stable after a motion according to a number of set flag bits in consecutive image frames; when the collecting device tends to be stable after the motion, a similarity between the i-th gravitational acceleration vector and a ground normal vector corresponding to a current ground equation is determined; and when the similarity is less than a similarity threshold, it is determined that the ground is to be re-detected.

Determining whether ground is to be re-detected

Growing community of inventors

Beijing, China

Hang Wang