SU1497550A1 - Apparatus for monitoring composition of multicomponent solutions - Google Patents

Abstract

The invention relates to a measurement technique and can be used to measure the concentration of liquid or gaseous mixtures. The purpose of the invention is to expand the functionality of the device. The device contains a oscillating frequency generator, a splitter, two measuring channels: working and reference, each of which contains a resonant meter, a detector, amplifiers, a differentiator, a trigger, in addition, the device contains time meters, a single vibrator, a logic circuit, a microprocessor, a heater, a circuit set the temperature. The purpose of the invention is achieved by increasing the number of measured parameters at fixed temperatures. 1 il.

Description

This invention relates to measurable. technology and can be used to measure the concentration of liquid or gaseous mixtures.

The purpose of the invention is to expand the functionality of the device.

The drawing shows a diagram of the proposed device.

The device contains a generator 1 oscillating frequency (GCCH), a splitter (P) 2, two channels: reference and measuring - extracting signals of changes in dielectric constant (x6) and tangent of dielectric loss (utgo), including the actual resonant measuring (id) 3 and reference (ED) 4 sensors, electronic thermometer 5, thermostat 6, detectors (e) 7 and 8, electronic switches (EC) 9 and 10, preamps (PU) 11 and 12, cascades of nonlinear amplification (NUC) 13 and 14, trigger (Tg) 15, meter 16 time intervals (IVI), differentiators (DC) 17 and 18, helmet 19 and 20 nonlinear amplification (KNU}, trigger (Tg) 21, meter 22 time intervals, triggers 23-25, meter 26 time intervals, electronic thermometer 27, comparison circuit 28 (temperature setting circuit 29 (DCS) of controlled-liquid, trigger (Tg) 30, heater 31 of a controlled fluid, one-shot (ON) 32, electromagnetic valve 33, logic circuit (LS) 34,; one-shot (S) 35 ai al-0-digits from 4 QD k | SL SP

3149

vvde converters (ADC) 36 and 37, microprocessor (MP) 38 with indicator 3, Reference sensor 4 is located in thermostat 6,

The device works as follows.

The signal GKCH 1 through P2 enters the resonant sensors 3 and 4, equipped with tubular dielectric inserts (not shown). The ED 4 tube insert is filled with a reference fluid and the entire structure is placed in thermostat 6, so that the reference meter is maintained at a constant temperature during the measurement, the ID 3 insert tube through the electromotor valve 33 is connected to the pipe | With the valve 33, the heater 31 and the thermometer 27, they also form a single & mechanical node.

 High-frequency signals from the sensors arrive at the detectors 7 and 8, at which the signals are formed in the form of resonant pulses, and in this way the position of the maxima of these and | pulses is proportional to the dielectric constant 5 of the corresponding liquid, and their width-tangent dielectric -loss tgS. Re-: 3; onance impulses with EC 9 and 10 are received at PU 11 and 12, working E | linear. Amplifier mode, With you- 11U signals are received at KNU 13 and | J4 and DC 17 and 18. In KNU, each of the Signals is amplified and distorted,, - liaK, in order to provide a clearer i -th separation of the maximum point, which is especially important for wide pulses characteristic of substances with a high level of dielectric loss. The output signals of the NUC 13 and 14 are triggered by Tr 15, to the output of which a pulse is formed, the duration of which is proportional to i. changes in the dielectric constant of the controlled fluid relative to the reference,

In DC 17 and 18, the resonant pulses are differentiated so that at the output of each of them a pair of different polar pulses is formed, the maxima of which correspond to the level of 0.5 of the maximum of the resonant pulse. Each of these pulses is amplified by its KNU 19, 20 and 23, 24 and is fed to the outputs of Tg 21 and 25, respectively. Thus, at the output of each of Tg 21

0

five

with

Q 5

five

0

five

0

five

0

and 25 pulses are formed, the durations of which correspond to the width of the resonant pulses ID 3 and ED 4 and which are proportional to the tangent of the dielectric loss angle tg5, respectively, of the controlled and reference liquids.

The temperature control and control unit operates as follows. The DCS 29 provides a stepwise set of signals corresponding to the levels of the signals from the output of the electronic thermometer 27, which changes the temperature of the monitored fluid, and for convenience of operation, it is advisable that the set of signals correspond to sets of temperatures above the temperature of the reference fluid. Signals from CTS 29 and thermometer 27 are compared in CC 28. After switching on, signals from CTC 29 are sent to CC 28 and Tr 30. At the CC 28 output, a resonant signal is generated that starts Tr 30 and the heater 31 is turned on. The temperature of the controlled liquid rises , which leads to an increase in the signal from the thermometer 27 and a decrease in the signal from the CC 28 output. When the signals at the CC 28 outputs coincide, a zero signal appears at its output, which changes the state of Th 30 and the heater 31 is turned off. At the same time, a zero from the SS 28 output is fed to one of the information inputs of the LAN 34, at the other information input of which the signal from the output of the electronic thermometer 5 of the reference liquid is constantly present. When a zero output appears, the SS 28 and the corresponding input 34 at the output. 34 for- The frequency that permits the MP 38 to receive information is measured. The unit from the output of the LAN 34 starts the OB 35, which generates a pulse of the duration necessary for operation — Ml 38 to receive information. The presence of an impulse on H) The input of the AC 35 maintains the DCS 29 in an unchanged state. With the trailing edge of this pulse, the PMS 29 is transferred to a new potential level. At the output of the CC 28, a signal appears, blocking the LAN 34, which is equivalent to appearing zero at its output and prohibiting the operation of the MP 38, the cycle repeats. After all temperatures have been tested, the falling edge of the next pulse with RH 35 CLA 29 translates: to the initial state, which is equivalent to

the appearance of a negative pulse at its output. The negative signal from the output of the FMS 29 Tg 30 is maintained in the initial state and does not turn on the heater 31, but triggers the OB 32, which turns on the valve 33 to pump the liquid. The impulse from the output OB 32 arrives at the control input of the LAN 34, maintaining it in the initial state, and at the MP 38, permitting the processing of the accumulated information. The pulse duration of an OB 32 should provide information processing in the MP 38 and the restoration of the initial temperature

New batch of controlled LIQUID. Upon completion of this work cycle, the Information inputs of the LAN 34 will turn on signals ready to change its state so that the end of the pulse at the output of OB 32 will trigger the LAN 34 at the initial temperature level and transfer the MP 38 to the information accumulation mode. .

The display unit works as follows. The outputs of the MP 38 receive signals from the ADCs 36 and 37 about the temperatures of the reference and controlled liquids, and from IVI 16, 22 and 26 signals about the duration of the pulses from the outputs of the corresponding measuring triggers. The signals are processed by

recorded in the MP 38 program, which should also contain information

about period T kachani frequency GCCH 1: the values of f and tgо of the reference liquid and calibration curves The program provides by comparing the pulse duration from the output, Tg 15 with the period T the definition of the sign L, and

with the corresponding calibration quvia - the U value, and also by comparing the pulse durations from the outputs of Tg 21, 25. and their differences with the corresponding calibration curve of a definite utgo value. To this end, the circuit is graduated manually with reference fluids by repeatedly starting the TMS 29 at constant temperature. In this case, in ED 4, the composition of the liquid varies. Thus, if one of the reference fluids in ID 3 is to select the original reference fluid ED 4-, the systematic errors associated with the design of the sensors can be taken into account. Processing the results of calibration measurements is also carried out programmatically. After determining the values

Claims (1)

d and tg (for each of the temperatures, the corresponding formulas recalculate the concentrations of the components of the monitored liquid and, if necessary, calculate its other physical parameters. After each processing cycle, information about the calculated values goes to indicator 39, A device for controlling the composition of multicomponent solutions, containing a pipeline for pumping controlled liquid with a solenoid valve, oscillating frequency generator, splitter, two measuring channels — working and reference, each of which contains a series-connected resonant meter, detector, preamplifier, nonlinear amplifier, differentiator, two non-linear amplifiers, a trigger, as well as a trigger and an indicator; the trigger is connected by inputs to the output of the first non-linear amplifier of each measuring th channel, a display unit, characterized in that, in order to expand the functionality of the device, it includes two electronic thermometers, a controlled fluid heater, an additional trigger and a single-vibrator control, a controlled fluid temperature setting circuit, a comparison circuit and a logic circuit with a single-oscillator, analog-digital transducers, time interval meters, with the inputs of the comparison circuit connected to the electronic thermometer of the monitored fluid and the output of the temperature setting circuit, and its first output - with one of the information inputs of the logic circuit, the other information input of which is connected to the electronic thermometer of the reference liquid, the additional trigger inputs are connected to the outputs of the comparison and temperature settings, and its output is connected to the heater, the control one-shot input is connected to the output of the control circuit The temperature is set, and the outputs are connected, respectively, to the electromagnetic valve and the control input of a logic switch (HEM), one of the outputs of which is connected to the input of a single-oscillator, the output of which is connected to the input of the circuits ustanov1si temperature, the separation screenings contain electronic keys, each of which is connected between the detector output and the preamplifier input and connected to the output of the logic circuit; the display unit contains a microprocessor connected to the output of the logic circuit through analog-digital converters with electronic teriomet- paNtti, and through time interval meters - with triggers of measuring channels.