SU1427237A1 - Viscosimeter - Google Patents

Abstract

The invention relates to instrumentation engineering and can be used to measure liquids in-situ and to control the readiness of synthetic resins at the stage of their polymerization. The goal is to improve the measurement accuracy of the controlled fluid. The viscometer contains a primary measuring transducer comprising a motor connected to a viscosity sensor mounted on the shaft, a measuring unit including a pulse driver, a generator, pulse counters, logic elements, and a recording device. The measuring unit is equipped with a time interval driver, implemented as a frequency divider, which is connected via a one-oscillator to a code converter, which includes a comparator, the outputs of which are electrically connected to a pulse accumulator and a reference generator, and the output is connected to a recording device made in the form of a digital computing unit. The electric motor is made in the form of a two-phase asynchronous AC motor with a hollow nonmagnetic short-circuited .. In the rotor. During the operation of the viscometer, a signal is formed at the output of the comparator as a sequence of codes, the duration of each code is proportional to the viscosity, and the number of pulses in the code corresponds to the current value of viscosity, 1 sludge. SL

Description

The invention relates to instrumentation engineering and can be used to measure the viscosity of liquids and monitor the readiness of synthetic resins at the stage of their polymerization.

The purpose of the invention is to improve the accuracy of measuring the viscosity of a controlled fluid.

The drawing shows a functional diagram of the viscometer.

The viscometer consists of a primary converter 1, a former 2 time intervals, a one-shot 3, a code converter 4, and a recording device 5.

The primary measuring transducer 1 comprises an electric motor 6, on the shaft 7 of which a viscosity sensor 8 is placed, placed in a bath 9 with the test medium. A shaper 10 pulses is coupled to shaft 7. As the electric motor 6, a two-phase induction asynchronous motor is used - with a hollow nonmagnetic short-circuited rotor.

A shaper of 2 time intervals, which provides a division of the frequency of the signal from the primary converter 1 of the viscosity sensor 8 and converting it into time intervals gated with needle pulses, consists of a frequency divider II and a driver 12 needle pulses.

The one-vibration 3 provides for the formation of pulse gated time intervals.

The QD-converter 4 consists of a comparator 13, a pulse accumulator 14 and a generator 15. The signals from the output of the one-oscillator 3, the pulse accumulator 14 and the generator 15 falling on the inputs of the comparator 13 are compared in the comparator 13 and at its output signals are formed as zkosti.

When the supply voltage is applied to the electric motor 6, the shaft 7 comes into rotation. The rotational speed of the shaft 7 is inversely proportional to viscosity. The pulse shaper 10 produces a pulse signal proportional to the speed of rotation of the sensor 8 in z-bone. The signal from the driver 10 pulses fed to the driver 2

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time intervals, where amplified, converted into square pulses and fed to the counter. A pulse signal from the counter is fed to the shaper of 12 needle pulses. The needle pulses fed to the one-shot 3 s of the former 2 time intervals are converted into square pulses. At the output of the one-shot 3, pulse-gated time intervals are created, the duration of which is proportional to the viscosity. The time intervals are fed simultaneously to the input of the comparator 13 and the accumulator 14 pulses, in which pauses are formed between the time intervals. At the same time, the comparator 13 receives signals from the accumulator 14 of pulses and the generator 15.

As a result, a signal is formed in the code of the comparator 13 as a sequence of codes, the duration of each code is proportional to viscosity, and the number of pulses in the code corresponds to the current value of viscosity. The code sequence is fed to the recording device 5.

Claims (1)

Invention Formula A viscometer containing a primary measuring transducer comprising an electric motor associated with a viscosity sensor mounted on a shaft, a measuring unit including a pulse shaper, a generator, pulse counters, logic elements and a recording device, characterized in that in order to improve the accuracy of viscosity measurement controlled liquid, the measuring unit is equipped with a shaper of time intervals, made in the form of a frequency divider, which is connected to a code converter through a single vibrator zovatelem comprising a comparator having inputs electrically connected to., and the reference drive pulse generator, and an output coupled to vtolnennym as a digital computing unit recording device, wherein the motor is configured as a two-phase AC induction motor with a hollow nonmagnetic korotkozamk--mentioned rotor. Yy