SU1312416A1 - Pressure transducer - Google Patents

Abstract

The invention relates to a technique for measuring the pressure of a column of water in a stream in open irrigation and drainage systems and improves the accuracy of the measurement. The sensor consists of a housing 1 with a holder 2 in the form of a pipe. For the case of the case, the window, into which the perceiving disk 3 enters, is covered with free hydraulic fabric 4. The interaction of the perceiving suit 3 with the liquid column changes the tension of the string 7, on which the permanent magnet 8 is fixed. Produced with vibrations of the string 7 at the gaps The EMF magnetic heads 9, after amplification, are converted into a frequency attributed to frequency meter 12, whose function is fluid pressure. 2 Il. (L from Ggo 4 05 Td

Description

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The invention relates to instrumentation, namely, devices for measuring pressure.

The purpose of the invention is to improve the measurement accuracy.

Figure 1 shows the sensor, side view, section; in figure 2 section aa in figo 1.

The sensor consists of a housing 1 with a holder 2 representing a pipe. A window is cut into the case into which the receiving disk 3 freely enters. To ensure that the case is airtight, the window into which the receiving disk enters is freely covered with a hydraulic fabric 4. A hinge bearing 5 is mounted inside the case, on which the lever 6 is fixed, The receiving disk 3 is attached to one shoulder, and the string 7 is attached to the other shoulder. A permanent magnet 8 is fixed on the string, which is located in the center of the two magnetic heads 9 connected in series as well as from the side of the driver 10. Connected from the magnetic heads 9 and excite The body 10 passes through the holder and is connected to a secondary device consisting of an amplifier 1 1 and a frequency meter 12.

The sensor works as follows.

The sensing disk 3 interacts with the measured liquid, as a result of which the tension changes

Editor A. Sabo

eight

Compiled by M.Ya. Zhukov Tehred L 0n1-1yyyk

Order 1964/40 Circulation 777 Subscription

VNIIPI State Committee of the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

162

strings 7. After excitation of oscillations by the exciter 10, the string 7 with magnet 8 oscillates around the gaps of the magnetic heads 9. The electromotive force generated at this voltage after amplification is converted to frequency and read from frequency meter 12. The pressure values are plotted as a function of frequency.

The proposed sensor has high accuracy and linearity of measurements and can be widely used in the national economy.

Claims (1)

Invention Formula Pressure sensor, comprising a housing, a membrane installed in it, a string converter containing a string, one end of which is fixed to the body and the other kinematically connected with the membrane, a pathogen and an oscillation receiver and a recording system connected to the oscillation receiver, characterized in that, in order to improve the measurement accuracy, a constant is fixed on the string the magnet, and the oscillation pattern is made in the form of two magnetic heads connected in series, with the heads mounted at the level of the magnet from opposite sides of the oscillation plane, the string and facing gaps to each other. D vA s 7 Uej Corrector S.Cherni