Abstract:
본 발명은 초음파 유량계 사용을 위한 기능성 정류기에 관한 것이다. 이를 위하여, 본 발명은 정류 몸체와; 상기 정류 몸체에 형성된 정류 유도홀; 및 상기 정류 유도홀의 내부에 소음 감쇠홀이 일체로 형성됨을 특징으로 한다. 따라서, 본 발명은 배관내의 유량계 전단에 설치되도록 하여 배관내의 유속 분포가 균일하게 유지될 수 있도록 하는 가운데 이를 통해 특정한 영역의 소음을 감소시킴으로써, 측정의 높은 정확도를 얻을 수 있도록 한 것이다.
Abstract:
PURPOSE: A thermal mass flow sensor is provided to irregularly form intervals of each thermocouple forming a thermopile and a heating unit so that precise measurement sensitivity within a wide flow rate range is obtained. CONSTITUTION: A thermal mass flow sensor includes a thin film (210), a heating unit (220), and first and second thermopiles (231, 232). The heating unit is formed on the thin film. The first and second thermopiles connect the thermocouples on the upper and lower streams of the heating unit in a row. Intervals of each thermocouple and the heating unit are irregularly formed so that the first and second thermopiles improve measurement sensitivity regardless of flow rate range.
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: An apparatus for measuring flow rate of gas is provided to remarkably reduce inspection time for a flowmeter and to save manufacturing cost thereof by simplifying and lightening the flow rate measuring apparatus. CONSTITUTION: A flow rate measuring apparatus includes a body(110) connected to a pipe(66) so as to form a closed space for allowing fluid to be maintained in the pipe(66). The pipe(66) is coupled to the body(110) through an upstream cap(111). A nozzle plate is provided to a downstream end of the body(110). A plurality of nozzle sections are installed on the nozzle plate so as to allow fluid contained in the body(110) to flow into a predetermined fluid path. A branch pipe(130) is coupled to an outlet side of each nozzle section. The branch pipe(130) has a valve for opening/closing a fluid path. A downstream cap(133) is coupled to an end of the branch pipe(130).
Abstract:
PURPOSE: A pulse tube system for evaluating an ultrasonic transducer property of the variation of temperature and pressure is provided to individually evaluate an acoustic impedance matching material or acoustic lens by changing the acoustic impedance of a medium. CONSTITUTION: A pulse tube(10) is arranged in an inner pipe(11) and includes a test target ultrasonic transducer(16) detached from or attached to a cover(15). A pulse receiver(20) receives a pulse signal reflected from a reflection plate(13). An oscilloscope(30) measures the voltage of the pulse signal received by the pulse receiver. A computer(40) compares the voltage of the pulse signal of the oscilloscope with the driving voltage of the test target ultrasonic transducer.
Abstract:
PURPOSE: A precision dynamic gas dilution calibrator is provided to prevent a blockage of a capillary tube and to evaluate the detecting performance of a measuring device in a precise level. CONSTITUTION: A precision dynamic gas dilution calibrator comprises: a first sonic nozzle bank(15) which is installed to an air line which supplies air on an inlet of a first sonic nozzle(13); a second sonic nozzle bank(16) which is installed to a gas line which supplies calibrating gas and has a second sonic nozzle and a laminar mass flow controller; and dilution chamber(22) which dilutes the calibrating gas with air by connecting to the first sonic nozzle and the second sonic nozzle.
Abstract:
누설율 모니터링 장치가 개시된다. 본 발명에 따른 누설율 모니터링 장치는 복수 개의 유로들중 하나의 유로를 선택하는 선택 수단과, 측정 범위에 따라 선택적으로 누설율을 측정하도록 유로별로 서로 다른 유량 측정 범위를 가지는 유량 센서를 구비하는 유량 측정부, 및 상기 유량 측정부로부터 출력된 데이터를 소정의 교정식을 사용하여 교정하는 중앙 처리부를 포함하는 것을 특징으로 한다. 본 발명에 따른 누설율 모니터링 장치는 서로 다른 유로에 그 유로의 용량에 해당하는 복수 개의 유량 측정기를 설치하고 측정 범위에 따라 선택적으로 누설율을 측정하는 것이 가능하므로 누설율의 측정 영역이 넓으며, 2차 교정식을 사용하여 센서로부터 출력된 데이터를 보정하여 결과적인 측정값으로 사용하기 때문에, 센서의 사용 기간이 오래되어 직선성이 떨어진 경우에도 비교적 정확한 결과를 얻을 수 있다. 또한, 본 발명에 따른 누설율 모니터링 장치는 일정 시간 동안의 측정 결과를 메모리에 저장할 수 있고, RS-232C 통신을 통하여 누설율 측정을 위한 각종 메뉴를 제어하고 측정 결과를 컴퓨터로 전송받을 수 있기 때문에 향후 측정 데이터를 인쇄하거나 분석하는데 편리하다.
Abstract:
PURPOSE: A wet gas flow measuring device is provided to easily adjust fluid level, to easily grasp integral value and to improve convenience by converting detected gas flow into flow under standard temperature and air pressure. CONSTITUTION: A device includes a drum(208); a magnetic coupling; an encoder; a level adjusting part; and a conversion/display part. The drum comprises a fixed number of compartments and an axis and has an inlet and an outlet of gas separated from each other and is filled with sealing fluid. The magnetic coupling couples the drum in a chamber(202) and the encoder outside the chamber by magnetism so that an axis of the encoder rotates by rotation of the drum. The encoder is driven by the magnetic coupling as the drum rotates to output pulse proportional to the rotation frequency of the drum. The level adjusting part has a bar(220) inserted by screw to adjust level of the sealing fluid by adjusting volume of the bar sinking under the sealing fluid. The conversion/display part calculates gas flow data based on the pulse to convert into flow under standard temperature and air pressure and display.
Abstract:
PURPOSE: A fluid leakage monitoring apparatus is provided to enlarge a measuring area, to improve precision of measurement in the measuring area, and to easily process data by installing a plurality of flow rate measuring devices in various fluid paths. CONSTITUTION: A fluid leakage monitoring apparatus includes a pre-filter(100), a filter(102), and a regulator(104). In addition, the fluid leakage monitoring apparatus has a first selection valve(106) for selecting one of fluid paths, a pressure sensor(112) for detecting pressure of gas, a second selection valve(110), a flow rate measuring section(108) installed in each fluid path, and a temperature sensor(114) for detecting temperature of gas. The flow rate measuring section(108) has a first mass flow controller(108a) to a fourth mass flow controller(108d) for measuring flow rate in various ranges.