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Derivation of measurement of mass flow meter


cP, it should be deleted ∞ P, and then sent to the square root calculator of its operations after that () = K (well) = KP = q (6) where, K - constant than the reverse. For Target Flowmeter. The flow equation and the differential pressure similar to that qu-C (F / p). (7) F-K Yang. ( where, F - fluid on the target force (Pa). Available in a similar way to get quality traffic. Density meter can be used with digital cable, ultrasonic,[link widoczny dla zalogowanych], or vibrating tube type,[link widoczny dla zalogowanych], and so crossing the continuous measurement of fluid density meter. 3 tests such as the combination of flow and density meters can be used to detect the fluid flowing through a pipe the size of a volume flow of the instrument, electromagnetic, ultrasonic, turbine, vortex flow meters and other flow meters of any of these 1 species and detection of fluid density The density of juice group units to form derived mass flowmeter principle of this form shown in Figure 2. Figure 2q detector station with the density of mass flow meter group has applied this type of mass flow meter. With a variety of forms such as: turbine flow meter and density meter group sets the float type volumetric flowmeter and density meter group sets the float type flow meter impeller and impeller flow density meter group and the use of Electromagnetic Radiation bit tangled in the same density meter group set; ultrasonic flow meter and audio impedance transition density meter group set up. Because these instruments group to Taiwan, constructed on the same principle, just to choose one set of turbine flow meter and density meter platform derived from the mass flowmeter is inverted - to illustrate the working principle of such a flow meter. From Figure 2 that, turbine flow meter and pipeline inspection regression I out the volume of the fluid flow is proportional to signal that if q; detected by the density meter and the fluid density P is proportional to signal that the Y. : P, to, Y signal input arithmetic unit for multiplication, we get q = xy = K Yang v (9) mass flow rate q. Were sent to the recorder and the accumulator, the mass flow direction and accumulation of records. Density meter uncertainty. A direct impact on the kinds of mass flow measurement accuracy. Therefore requested the density meter can be measured automatically and continuously. 4 Detection of Yang Ji} and the flow meter test port group A before 2 Wang: derivation of mass flow measurement of mass flow is derived l9 selection detection device is constituted by a combination of 2 meters, such as r will measure the differential pressure yang} or target type flow meter and measure the volume of fluid flow turbine, electromagnetic, vortex type, and so flow volume or group of units is the turbine flowmeter and differential pressure flowmeter to tert-side combination of the above, Figure 3. In Figure 3, set the output of the turbine flow meter is proportional to a z qv; set differential pressure flowmeter output signal Y, with Y is proportional to the sun - that is, JC ∞ as Y ∞} Figure 3 Yang and testing the detector with Combination of the mass flow meter, Y by multiplication device for the division, have y / x-Kfiq ~. / Q-K positive one (10) This is the kind of derivation of mass flowmeter works the same way, at all the way to send mass flow indicator or recorder for display; all the way to give an accumulated value of the totalizer. Derivation of the above 3 types of mass flowmeter, the mass flow of the cumulative value Ⅳ, by the following equation: nM-Jdt 』foot dt Conclusion When the temperature and pressure change is small but to comply when the ideal gas law, and the density and linear relationship between temperature measured over a temperature range of liquid flow, j to determine the type of fluid, it is easy on the temperature, pressure, automatic compensation, but also in the practical application process,[link widoczny dla zalogowanych], it already has a wide range of temperature,[link widoczny dla zalogowanych], pressure instrumentation, it is easy to implement pipeline fluid temperature and pressure testing. Especially with the microprocessor also makes extensive use of automatic compensation is therefore easy dinner can be considered as temperature, pressure flow measurement method automatically compensates for mass flow measurement methods than the benefit. Figure 4 is the gas flow temperature, pressure automatic compensation diagram. Figure 4 Ju gas flow, pressure automatic compensation diagram however. If the larger temperature range, the relationship between density and temperature as a linear relationship can not} or non-compliance under high pressure when the ideal gas law, especially when frequent changes in temperature and pressure or for crossing the moving components multiphase flow, not only cumbersome conversion can not be measured with high uncertainty, and sometimes not even worth taking the measurement results of Caryopteris. Mass flow timing of measurement becomes superior. This is the temperature, pressure, automatic compensation of the flowmeter has been practical at the same time, why the reasons for carrying out mass flow measurement. Volume 5, References 1 Yang reported hygiene. Ripple measurement instrument Beijing: Mechanical Industry Press Du, 19862l11 Lang and other flow field stays the amount of manual dating back 19,873 Zhude Xiang Beijing China Metrology Publishing House. Principle and Application of flow meter. Shanghai East China Institute of the small boat community. 19924 Su Yanxun and so on. Flow measurement. Beijing,[link widoczny dla zalogowanych], China Metrology Publishing House. 1988

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