SU1469423A1 - Concentration measuring device - Google Patents

Abstract

The invention relates to a measurement technique and can be used to study unsaturated solutions by measuring their concentration. The purpose of the invention is to increase the accuracy of determining the concentration and reduce the complexity of the graduating process. The device contains a heater, a meter of tecnometer equipment, an electrical conductivity meter, a memory device, a linear transducer, a concentration calculator, an analyzer of calculation results, a generator of graduated coefficients. The purpose of the invention is achieved by calibrating the device according to the real state of the primary converters and eliminating the use of standards for calibration. .1 il. with "(L

Description

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The invention relates to a measurement technique and can be used to study non-saturated solutions by measuring their concentration (salinity).

The purpose of the invention is to improve the accuracy of determining the concentration and the reduction of the labor intensity of the grading processes.

The drawing shows a block diagram of a device for measuring concentration.

The device contains a heater 1 solution, the measuring channel 2. temperature measurement conductivity channel 3, control unit 4, memory 5, linear transducer 6, concentration calculator 7, calculation result analyzer 8 and calibration coefficient generator 9.

The output of the temperature measuring channel 2 is connected to the input of the control unit 4. The outputs of the temperature channel 2 and the conduction channel 3 are connected respectively to the first and second inputs of the memory device 5. The output of the memory device 5 is connected in series with a linear converter 6, a concentration calculator 7, an analyzer 8 of the calculation results and a generator 9 of calibration factors. The output of the generator is 9 graded4; 5h o: 4

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The connecting coefficients are connected to the second input of the linear converter 6. The first output of the control unit 4 is connected to the heater 1, and the second to the eighth outputs is connected to the control inputs of all the blocks except the heater.

The device can operate in the graduation mode and in the measurement mode.

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In the calibration mode, the operation of the device consists of two stages — from the accumulation of information and the step of determining the calibration coefficients.

At the stage of accumulation of information in the process of loading the working solution of heating telv to 1 G; opm: - .h; it records the output binary binary COD.OV of the measuring channels temperature 2 and conductivity 3 using synchronizing pulses of control unit 4 in the storage device 5 ,,

At the stage of determining the calibration factors, heater 1 and channels 2 and 3 are not involved.

From the storage device 5, the values of the temperature codes N and the electrical conductivity N are sequentially extracted and fed to the linear converter 6, which simulates the linear characteristics of the measuring channels and performs the operations,. Ee K, K are consistently for temperature and electrical conductivity with time separation. In formulas (K, K, j), (K, 5 K) are pairs of calibration coefficients of temperature and electrical conductivity, respectively, the exact values of which are not known before graduations. From the linear transducer 6, the values of T and X are successively supplied to the concentration evacuator 7 and recorded in its internal registers. The concentration indicator 7 calculates using the formula

.SL, T, L, T%

—Ee (b, + b ,, T + b, b tb + 9b (bh + h-C, T + b, b Т t) b „t + f b, T –b„ t,

de T - temperature;

ee - electrical conductivity, b. - coefficient of polynomial dependence of concentration,

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perurature and electrical conductivity.

The concentration value is transmitted to the analyzer 8 calculation results, which accumulates the calculated values of the concentration S, analyzes the differences of these values and controls the generator 9 calibration coefficients, which successively causes the calibration coefficients for temperature and electropnectivity to the linear converter 6. The process continues until If the condition is satisfied, dd, then the analyzer 8 of the calculation results is turned off, and in the generator 9, the calibration coefficients are stored after values of calibration coefficients.

In measurement mode 3, heater 1 and analyzer 8 calculation results are not used. From the digital measuring channels, the temperatures Fe 2 and conductivities 3 synchronously record 5 values of binary codes in the memory. From the memory 5, the values of the temperature codes for the electrical conductivity are successively applied to the linear converter 6, which performs the above operations using the coefficients stored in the generator 9 coefficients in the calibration mode. The values of temperature and electrical conductivity come in series from the linear converter 6 to the concentration calculator 7, the output of which in this mode is the output of the entire device,

In both modes, the operation of the device is synchronized by the control unit 4.

Claims (1)

Formula A device for measuring concentration, containing channels of temperature, electrical conductivity, heater and control unit, the output of the measuring channel of temperature being connected to the input of the control unit, the first output of the control unit with a video switch with a heater that differs from The accuracy of determining the concentration and reducing the laboriousness of the calibration processes, it additionally contains a memory block. 14694236 a linear converter, computed linear linear converter, a concentration tel, analyzer of calculation results and a generator of calibration coefficients, the outputs of measuring channels of temperature and electrical conductivity are connected respectively to the first and second inputs of the storage unit, the output of which is connected to the series concentration calculator the generator of calibration coefficients, the output of the latter is connected to the second input of the linear converter, and the second The eighth outputs of the control unit are connected to the control inputs of all 10 blocks, except for the heater. by a linear converter, with a concentration calculator, a results analyzer, a generator of calibration coefficients, the output of the latter is connected to the second input of the linear converter, and the second to eighth outputs of the control unit are connected to the control inputs of all the blocks except the heater. UVFF