Abstract:
The present invention suggests an ultrasonic flow measuring method which calculation tomography improved in ultrasonic flow measurement is applied, and if using calculation tomography, linear flow rate distribution is converted to dot flow rate distribution thereby reducing deviation of a measurement value and a standard value. The ultrasonic flow measuring method of the present invention is a ultrasonic determination and comprises: a step of measuring a linear flow rate in a flow direction of fluid passing through a pipe inside; a step of converting the measured linear flow rate to linear flow rate distribution; a step of converting to dot flow rate distribution by applying the calculation tomography on the linear flow rate distribution; and a step of calculating cross section mean current velocity and a flow amount by integrating the dot flow rate distribution. [Reference numerals] (AA) Measuring the arrival time of ultrasonic waves; (BB) Calculating a linear flow rate; (S150) Converting to the linear flow rate distribution; (S160) Generating dot flow rate distribution; (S180) Calculating cross section average flow velocity and flow rate
Abstract:
PURPOSE: A device for regulating the width of an ultrasonic beam and a method for setting an installation position thereof are provided to extend the width of the ultrasonic beam with a beam width extending unit, thereby measuring an exact flow rate even through a rotary current is generated in the inside of a pipe. CONSTITUTION: A device for regulating the width of an ultrasonic beam comprises an ultrasonic transmitting unit(10) and a beam width extending unit(20). The ultrasonic transmitting unit is joined to one end part of a sensor of an ultrasonic flow meter, thereby transmitting the beam width of the ultrasonic being generated by the sensor while being uniformly maintained. The beam width extending unit extends the beam width of the ultrasonic being transmitted from the ultrasonic transmitting unit.
Abstract:
본 발명의 와류 유량계는, 유체 흐름 경로상에 위치한 와류 유도 구조물; 상기 와류 유도 구조물에 의해 유도되는 와류가 존재하는 지점에 설치되며, 유체 흐름에서 발생하는 와류에 따라 변형되는 필름형 와류 감지부; 및 상기 필름형 와류 감지부의 변형된 정도에 따라 상기 유체 흐름 경로 상의 유량을 계산하는 유량 계산부를 포함할 수 있다. 본 발명의 와류 유량계를 적용하여, 휘어지는 성질을 가진 필름형 압전 소자를 구조체에 설치하고 구조체에 의해 발생하는 와류의 와흘림 주파수를 측정함으로써 배관 또는 개수로를 지나는 유량을 정확하게 측정할 수 있다.
Abstract:
PURPOSE: An optical interference flow velocity meter for multi-dimensional flow velocity measurement stably measures flow velocity by high resolution and improves the precision of measurement even in low flow velocity. CONSTITUTION: An optical interference flow velocity meter for multi-dimensional flow velocity measurement includes a light generator (10), a light divider (20), a condenser (30), a light detector (40), and a flow velocity calculator (50). The light generator generates a laser. The light divider divides the laser generated from the light generator at a constant rate. The condenser concentrates the laser provided from the light divider in a pipe. The light detector detects electromagnetic intensity by a laser signal scattered through the fluid of the pipe. The flow velocity calculator calculates the velocity of the fluid by using the electromagnetic intensity detected from the light detector. [Reference numerals] (10) Light generator; (20) Light divider; (30) Condenser; (40) Light detector; (50) Flow velocity calculator
Abstract:
본 발명이 해결하려는 과제는 회전류에 의하여 발생한 편차를 정확하게 산출하고 이를 이용하여 정확한 유량을 검출하기 위한 초음파 유량계의 편차보정 방법을 제공하는 것이다. 본 발명에 의하면, 파스칼의 삼각형과 Levenberg-Marquardt 알고리즘을 통하여 산출한 유량편차 보정곡선에 레이놀즈 수와 초음파 유량계의 설치 위치를 반영하여 보정편차를 산출하므로, 회전류에 의하여 발생한 편차를 정확하게 산출할 수 있는 장점이 있다. 또한, 산출한 편차를 기반으로 초음파 유량계로부터 측정한 유량을 보정하여 더욱 정확한 유량을 검출할 수 있는 장점이 있다.
Abstract:
PURPOSE: A rotary pipe coupler, which measures the flow rate or flow velocity about entire cross section of a pipeline by rotating a measuring member at a free angle, is provided to measure the flow velocity if the inside of pipeline by changing the measuring position of sensors. CONSTITUTION: A rotary pipe coupler comprises fixed pipes(1), rotating pipes(2), and a guide bracket(3). The fixed pipes are fixed to the end part of the pipe with a fastening flange(11). The guide flange(12) is installed at the end of the fixed pipe which faces to the pipe equipped with a pipe element. The rotating pipes are fixed to the end part of the pipe element the fastening flange. A rotary flange of the rotating pipe is installed in the end part of the guide flange. The guide bracket supports the rotary flange to rotate, when the guide flange is connected with the rotary flange.