ugg milano U-manometer mercury surface of measurin

Mercury U-manometer measuring surface of a new optical detector

A mercury U-tube manometer fluid to measure the pressure drop. U-gauge of the string is very small capillary cross section, but the capillary pressure drop measurements difficult part of the most important and because the mercury level is uncertainty. The easiest way is to use the last sight height meter cross lines and optical detection methods, the latter by Edwards (Witzel1) improved use of mercury level in the floating magnetic stainless steel ball float, float positioning this method can make the difference in the 25mHg Within the value. In addition Flynnetal also used before, the vertical adjustable electrode to detect mercury level, the measurement error of the value of control within the 25mHg. Whether the former or the latter measuring the optical power projection measurement method not the measurement of the high degree of confidence, reliability is also poor. Such as the use of two other significant differences between the connected volume of container to produce a total displacement of poor method of pressure measurement errors exist in the same issue and the uncertainty Second, new instruments and data structure of practice to improve digestion, we used light -4 ・ NO2Jun. , 1990, with the sensor-type electrical test instruments to measure the level of mercury U-manometer. Its shape shown in Figure 1, the device consists of ~ / J-, light, and the hole diameter 2ram vertical angle of 30. Prism and the two operational amplifiers with optical tube. Before the head with a lens. Emitted by the light beam through a hole issued by the prism into two beams, respectively, by the photocell P. And Pz accepted. P. And P between the differential output from the gain of 10. Op amplifier. Bin moved to move the state total population figure I light a new optical appearance of the three gun detector, working state in Figure 1 micrometer spindle is used to simulate the surface of the mercury U-manometer,[link widoczny dla zalogowanych], when placed in the hole between the heart and prism axis running along its axis, the photocell output heart Pz linear movement axis decreases. Through the prism of the top of the spindle, the photocell P. Input P Ⅲ is similar to the way optical tube axis along the straight line decreases careful run-time, differential voltage (P a P) and spindle displacement relationship between the Figure 2. Here symbols O and X on behalf of the heart before and rotary axial direction of center axis in Figure 2, the direction of Q is no distinction between the two, but in the rotation curve has been moved 0.08ram Road invalid itinerary. If we do not use the prism, the curve shown in Figure 3 does not exist a sharp graphics, so this device in the prism is an important part. If the top of the curve in Figure 2,[link widoczny dla zalogowanych], the output voltage (Pt-P) axis of displacement and change in heart, but it is not sharp. Shape of the curve cut by the prism block. Figure 2 Figure analysis of the differential output prism (pl-p2) corresponding micrometer spindle displacement. ● A =- bl La enough c_, 3 without the prism of the differential pressure output (pl-p2) corresponding micrometer spindle displacement. The width of that curve at the top of the small hole from the shape of the heart axis and the prism and the thermal fluctuations in the optical path of the beam caused by refraction of Integrated. Figure 2 curve shoulder on stage,[link widoczny dla zalogowanych], the output is highly sensitive with the Kan Im about to increase or decrease linearly. If we start using this curve sets, requires detectors sensitive than the threshold with 10mHg the top of the curve more sensitive to the valve. Fourth, the conclusion that the advantages of new optical detector 1,[link widoczny dla zalogowanych], is non-contact measurement, using optical detection and signal output combination to the acquisition of signals and their analog and digital display of prepared conditions. 2, detection of convenient, fast, and high sensitivity portable. 3, displacement by the pressure difference into a difference, can be manual and automatic control Reference 1, O. W. witzell: AEPap. 61 WA a 331.12 a metrological verification regulations assembly (pressure and vacuum) 19813,[link widoczny dla zalogowanych], G. P. Flynn. R. V. Hanks. N. A. 1emaireandJ. Ross: J. Chdm. phys. 】 54.5 * 38. f. v.

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