Functions and Requirements for Automated Liquid Level Gauge Instruments in SST and DST Farms

A new kind of device measuring liquid level automatically is developed which is composed of camera, illuminating system and industrial computer. It’s based on image measurement technology. The image of the transparent glass liquid level gauge which is installed on the volumetric tank of a flow calibration facility is captured by a camera. After a series of image pre-processing, such as interception, gamma correction, edge detection and so on, the value of liquid level which is the liquid level of the tank can be got by so called peak method. The measurement error is 0.1mm.

Download Full-text

Experimental study of liquid level gauge for liquid hydrogen using Helmholtz resonance technique

Cryogenics ◽

10.1016/j.cryogenics.2016.04.011 ◽

2016 ◽

Vol 77 ◽

pp. 43-48 ◽

Cited By ~ 2

Author(s):

Akihiro Nakano ◽

Takahisa Nishizu

Keyword(s):

Experimental Study ◽

Liquid Hydrogen ◽

Liquid Level ◽

Level Gauge ◽

Resonance Technique ◽

Helmholtz Resonance

Download Full-text

Automatic Detection and Control System of Sewage Re-Flooding in Complicated Small-Split Oilfield

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.475-476.661 ◽

2013 ◽

Vol 475-476 ◽

pp. 661-665

Author(s):

Shu Yi Wang ◽

Li Mei Song ◽

Yu Guang Geng ◽

Zhi Hu Liu ◽

Zhi Xin Li

Keyword(s):

Control System ◽

High Performance ◽

Mechanical Valve ◽

Oil Field ◽

Liquid Level ◽

Level Gauge ◽

Price Ratio ◽

Labor Intensity ◽

And Control ◽

Measuring Control

This passage mainly introduces about the design of liquid level and boundary measuring control at sewage re-flooding craft in small split oil field. In order to achieve automatically cutting flooding and re-flooding in the procedure in small split oil-field, the scheme is to test liquid level and boundary by using high performance to price ratio new double level gauge, to utilize electric valve instead of mechanical valve and to choose PLC to control system logic. Eventually, it will reduce the labor intensity.

Download Full-text

Experimental Study of Thermal and Hydraulic Characteristics of Pressurizer-Type Heating Container During Blowdown Process

Volume 3: Student Paper Competition; Thermal-Hydraulics; Verification and Validation ◽

10.1115/icone2020-16117 ◽

2020 ◽

Author(s):

Bingzheng Ke ◽

Puzhen Gao ◽

Bo Wang ◽

Bowen Chen ◽

Ru Li ◽

...

Keyword(s):

Temperature Change ◽

Power Plants ◽

Inflection Point ◽

Pressure Gauge ◽

Heating Power ◽

Liquid Level ◽

Level Gauge ◽

Measured Temperature ◽

Hydraulic Characteristics ◽

Positive Growth

Abstract Blowdown process is an important process in LOCA. Studying the internal thermal hydraulic characteristics of the pressurizer during LOCA blowdown process can help to accurately analyze the process of the whole LOCA, which is of great significance to reduce the hazard of accidents and improve the safety of nuclear power plants. An experiment system of blowdown process under low pressure conditions is built, and it uses a pressure gauge and a differential pressure level gauge to measure the pressure and liquid level in the pressurizer-type heating container, and uses a thermocouple to measure the temperature in the pressurizer-type heating container at different heights and distances from the centerline. The changes of pressure, liquid level and temperature characteristics during the blowdown process were obtained. The research results show that the higher the heating power, the greater the slope of pressure change in the heating container, and the pressure changes from negative to positive growth; The greater the heating power is, the faster the liquid level decreases, and the liquid level decreases sharply after the blowdown inflection point. The greater the heating power is, the greater the rate of temperature change, from negative growth to positive growth. The temperature change rate after the blowdown inflection point is reduced. As the height increases, the temperature inside the container first increases and then decreases; the further away from the container’s centerline, the higher the measured temperature.

Download Full-text