SU1239632A1 - Meter of electric properties of ore and rock - Google Patents

Abstract

The invention is intended to measure the components of the complex resistance of rock and ore samples and can be used in conducting geophysical surveys, as well as in monitoring the electrical properties of samples of various materials. The purpose of the invention is to expand the functionality of the meter. The meter for electrical properties of rocks and ores contains a tunable generator 1, a two-electrode sensor 3, differential amplifiers 4 and 5, amplitude detectors 7 and M, a ratio meter 8 and a recorder 12. Introduction to the device of a synchronous detector 6, quadrants 9 and 16, meters 10 and The 15 relations, the adder 13, the subtraction block 14, and the formation of new connections between the elements provide an additional measure of the active and reactive components of the complex resistance of the object of measurement. 1 il. with "e (L to OO; about about with GS

Description

I

The invention relates to instrumentation engineering, is intended to measure the components of the impedance of samples of mining rocks and ores, and can be used in geophysical surveys, as well as in monitoring the electrical properties of samples of various materials.

The purpose of the invention is to expand the functional capabilities of the device by providing in addition, in particular, the measurement of the active and reactive components of the impedance of the measurement object.

The drawing shows a structural diagram of the meter of electrical properties of rocks and ores.

The meter contains tunable generator 1, the first output of which is connected through a reference resistor 2 to the first electrode of a two% electrode sensor 3 with a measured sample, the second electrode of which is connected to the second output of the generator 1 and a common bus, the first differential amplifier 4, whose inputs connected to the terminals of this resistor 2, the second differential amplifier 5, the inputs of which are connected to the electrodes of the two-electrode sensor 3, the output of the differential amplifier 4 is connected to the first input of the synchronous detector ora 6 and through the amplitude detector 7 is connected to the first input of the ratio meter 8 and the input of the second quadrant 9, the output of which is connected to the second input of the second ratio meter 10, the output of the second differential amplifier 5 is connected to the second input of the synchronous detector -6 and through the amplitude detector I1 connected to the second input of the first meter 8 ratios, the output of which is connected to the first input of the recorder 12, to the first input of the adder 13 and the second input of the subtractor i 4, the output of which is connected to the second input Pa-12 and the second input of the adder 13, the output of which is connected to the second input of the third ratio meter 15, the output of which is connected to the first input of the subtraction unit 14, the output of the synchronous detector 6 is connected to the first input of the second ratio meter 10, max (3d connected with the third input of the recorder 12 and through the first

39632 2

quad 16 is connected to the first input of the third meter 15 ratios.

The device works as follows.

Frequency tunable generator 1 generates a harmonic voltage applied to the load circuit formed by successively connected by a reference resistor 2 and a measured rock sample installed in a two-electrode sensor 3 ,, The current flowing through the load circuit creates a drop in voltage the reference resistor 2

five

and

e-R (

R "+ Z

and on measuring sample sensor 3

20

and,

e. Z

RO + 2

where e is the output voltage of the generator I;

R0 is the resistance value of the reference resistor 2; Z is the value of the complex resistance of the measured sample of sensor 3.

Differential amplifiers 4 and 5 isolate the indicated voltages and amplify them to the required magnitude of the amplitude detectors 7 and 11.

After detecting at the outputs of amplitude detectors 7 and 1, the action of co-voltage

e, R (

Rn + Z

and

and/,

i: Ei5- i

iRo + Zl.

| eiZ

 RO

Synchronous detector 6 performs the operation of multiplying voltages and and and. with the release of the active component of the complex voltage

e 5 (R; z)

where R j is the active component

sample impedance.

At the output of the quadrant 9, a voltage is formed

and and 6 (RO +

z) 2

and it is applied to the second input of the second meter 10 ratios, the first input of which is energized. At the output of the meter 10 ratios, a voltage is obtained that is proportional with an accuracy of up to a multiplier - To the active component of the sample impedance

UG - to Rj p and "- H RO" At the same time as the output of the first meter of 8 ratios, a voltage Ujj is formed, which is proportional to the constant factor Kj. sample impedance module

and

i-g

K 5- RO

and.

The voltage proportional to the active component of the sample impedance is squared by a square of .16 and fed to the first input of the third meter of 15 ratios, to the second input of which voltage is applied from the output of the summer- 13, to the first input of which a voltage is applied proportional to the modulus Z, and the second input is the output voltage of the subtraction unit 14, which forms the difference of the voltages from the output of the third meter 15 ratios and voltages, proportional to the module Z

If we denote the output voltage of the block 14 subtraction U, then we can write

shih and - og and; ";

.-

1 .g.

from Uewx Uz. + UBHX Uz +

+ and “Pbykh - UK;

URHX N / U - Ul,

RO

those. proportional to the module of the reactive component of the sample impedance with an accuracy of up to a constant multiplier Kj

The voltage from the output of the meter 8 ratios, proportional to the module Z, the voltage from the output of the meter 10 ratios, proportional to the active component of R, and the voltage from the output 5

ten

15

20

25, -

35

40

45

- 50, 55 th stroke of subtraction block 14, proportional to the reactive component X, are fed to the recorder 12, where they are recorded.

Claims (1)

Invention Formula A measuring instrument of electrical properties of rocks and a throttle, containing a generator, the first output of which through a reference resistor is connected to the first electrode of a two-electrode sensor with a measurable sample, the second electrode of which is connected to the second output of the generator and a common bus, two differential amplifiers, the inputs of the first of which connected to the outputs of the reference resistor, the inputs of the second differential amplifier are connected to the outputs of a two-electrode sensor, two amplitude detectors, the input of the first amplitude detector with It is connected to the output of the first differential amplifier, and the output is connected to the first input of the first ratio meter, the input of the second amplitude detector is connected to the output of the second amplifier, and the output is connected to the second input of the first metering ratio, the output of which. connected to the first input of the recorder, characterized in that, in order to expand the functionality, a synchronous detector is added to it, the second and third ratio meters, the first and second quadrants, the subtraction unit and the adder, the first and second inputs of the synchronous detector are connected to the corresponding the outputs of the first and second differential amplifiers, and the output is connected to the first input of the second ratio meter, the output of which is connected to the second input of the recorder and through the first quad connector En with the first input of the third meter relative; The output of which is connected to the first input of the subtraction unit, the second input of which is connected to the output of the first ratio meter and to the first input of the adder, the second input of which is connected to the third, the recorder input and output of the output unit, the output of the third the ratio meter, the output of the first amplitude detector through the second quad is connected to the second input of the second ratio meter.