Guangdong University of Technology

Soil and Water Conservation Monitoring Center of Pearl River Basin, Pearl River Water Resources Commission of the Ministry of Water Resources

Bebetter Med Inc.

Bin Liu

Junqi Li

Changgeng Qian

Xiong Cai

Jun Huang

Zhihao Zhang

Hao Li

Huajin You

Yanyan Wang

Weicai Xue

Yuanhui Qing

Le Li

Shiqing Zhou

Xinyue Kou

Pingwei Jin

Bin Yin

Liping Lin

Mingsheng Lin

Xiaolin Liu

Zhou Xu

Xuebing Jiang

Guangyan Wu

Jiehai Zhou

Yunwo Weng

Chaoyu Huang

Caifeng Mai

The present disclosure provides a multi-layer open channel portable flow measuring device based on a water impulse principle and a flow measuring method; an instantaneous water head height of a water-carrying section, namely, a water level H is measured through a pressure sensor at a bottom of a U-shaped hollow tube; at the same time, layered multi-point velocity measuring components in equidistant layout include a series of position 'current meters' composed of tension sensors, hollow punching lightweight steel balls and lightweight elastic steel ropes to measure velocities Vof different points, n depends on the layer decided to be arranged according to a channel depth, an instantaneous flow value of the whole water-carrying section is further acquired through multi-layer flow accumulation, and with a simple structure, intelligent control, easy operation and convenient carrying, the present disclosure may further improve the flow measuring precision.

Multi-layer open channel portable flow measuring device based on water impulse principle and flow measuring method

Disclosed is a low-power negative voltage generator for RF switches, which is provided with a monostable trigger and a voltage-controlled oscillator before a non-overlapping clock circuit and a charge pump. The monostable trigger can change from a stable state to a transient state when a switch channel selection signal jumps; the clock frequency of the voltage controlled oscillator will be increased during the transient state of the monostable trigger, and after the monostable trigger returns to a stable state, its clock frequency will be reduced to the initial state, thereby ensuring that the circuit power consumption is reduced while the transient characteristic is high.

Low-power consumption negative voltage generator for radio frequency switches

Growing community of inventors

Guangzhou, China

Bin Liu