Method of measuring permittivity of dielectrics |
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IPC classes for russian patent Method of measuring permittivity of dielectrics (RU 2251706):
            
 Device for measuring permittivity of dielectrics / 2251705
Device comprises indication unit, electronic measuring unit, sensor, and control members. The indication unit and measuring electronic unit are mounted in a single housing. The sensor is a cylindrical plate-type capacitor.
 Microwave method of measurement of magneto-dielectric parameters and thickness of spin coatings on surface of metal / 2251073
Device is proposed for measurement of dielectric and magnetic permeability as well as thickness of spin coatings on surface of metal and can be used in chemical industry for inspecting composition and properties of liquid and solid media. Electro-magnetic field is induced in body of dielectric material to be inspected which material is applied onto dielectric substrate, by means of sequent excitation of slow surface waves: two E-waves are excited at different, but having almost the same value, wavelengths λr1 and λr2 and one H-wave having wavelength of λr3. Attenuation of field intensity is measured t normal plane in relation to direction of wave propagation by means of receiving vibrators system for different values of base d between them. Normal attenuation factors αE1,αE2 and αH are found from ratio of E(y)= E0 exp[-α(y) y]. Magnetic and dielectric permeability and thickness of magneto-dielectric coating are found from relations of
 Super-high frequency method of measurement of dielectric permeability and thickness of dielectric plates / 2249178
Electromagnet wave is induced by means of directed aerial. The wave is incident to dielectric plate. Brusterain angle of incident wave is defined from minimum value of reflected wave and value of dielectric permeability is calculated. Power of incident and reflected waves are measured and the value of reflectivity and specific conductivity are calculated as well as value of dielectric loss of dielectric plate. Then incident angle of electromagnet wave is increased till achieving value providing total internal reflection of electromagnet wave and attenuation of intensity is measured at normal plane relatively direction of wave propagation. Factors of normal attenuation and thickness of dielectric plate are calculated. Method allows to find complex dielectric permeability and thickness of dielectric plates free of dielectric substrates.
 Device for transformation of parameters of variable- induction pickups / 2247401
The device has a pulse generator, whose output is connected to the measuring and reference arms connected to the measuring and reference arms of the variable-induction pickup, circuit providing for separation of the pulse of mismatch between the durations of the transparent processes in the measuring and reference arms. The duration of the mismatch pulse is determined by the difference of the parameters of the inductance coils of the measuring and reference arms. Each arm of the pickup has an inductance coil, transistor and a capacitor. The transistor bases are connected to the output of the pulse generator. The signal ends of the inductance coils are connected to the transistor emitters and to the comparison inputs of the comparators. The other ends of the coils are connected to a common bus. Capacitors are cut in between the transistor collectors and emitters. The collectors of both transistors are connected to the voltage source.
 Device for measurement of complex permittivity of low- impedance materials at microwave frequencies / 2247400
Measurements are taken with the aid of a waveguide traveling-wave resonator, the values of the complex permittivity are determined by the measured values of resonance frequency, attenuation and quality of resonance frequency, attenuation and quality factor.
 Device for measurement of high values of complex permittivity of low-impedance materials at microwave frequencies / 2247399
Measurements are taken with the aid of a waveguide standing-wave resonator, the values of the complex permittivity are determined by the measured values of resonance frequency, attenuation and quality factor.
 Device for measuring concentration in mixture / 2246118
Device has long line whose end is connected with a sensor which is in a contact with the mixture. The sensor is connected to the circuit of generator which is connected with frequency meter. The sensor is made of a capacitor which is connected to the line through the main inductive coils and to the generator through the two additional coils. The line can be made of coaxial line or shielded two-wire line provided with the capacitive sensor made of cylindrical capacitor or shielded flat capacitor, respectively. The surface of at least one of the wires of the sensor which is in a contact with the mixture can be covered with a dielectric shell.
 Disturbing electric meter / 2243571
The invention relates to non-invasive control of materials, substances, products, and may be used for study of their physico-mechanical properties, and processes for assessing their quality (availability) on the magnitude of the dielectric parameter
 Device for precision measurement of electrical capacitance / 2239200
The invention relates to the field of electrical equipment, namely, devices for precision measurements of electric tanks
 The converter parameters of the reactive elements in the frequency / 2237252
The invention relates to measuring technique and can be used to determine the parameters of electrical circuits, dielectric sensing, of conductometry, when measuring parameters contactless capacitive and inductive sensors
Device for measuring concentration in mixture / 2246118
Device has long line whose end is connected with a sensor which is in a contact with the mixture. The sensor is connected to the circuit of generator which is connected with frequency meter. The sensor is made of a capacitor which is connected to the line through the main inductive coils and to the generator through the two additional coils. The line can be made of coaxial line or shielded two-wire line provided with the capacitive sensor made of cylindrical capacitor or shielded flat capacitor, respectively. The surface of at least one of the wires of the sensor which is in a contact with the mixture can be covered with a dielectric shell.
Device for measurement of high values of complex permittivity of low-impedance materials at microwave frequencies / 2247399
Measurements are taken with the aid of a waveguide standing-wave resonator, the values of the complex permittivity are determined by the measured values of resonance frequency, attenuation and quality factor.
Device for measurement of complex permittivity of low- impedance materials at microwave frequencies / 2247400
Measurements are taken with the aid of a waveguide traveling-wave resonator, the values of the complex permittivity are determined by the measured values of resonance frequency, attenuation and quality of resonance frequency, attenuation and quality factor.
Device for transformation of parameters of variable- induction pickups / 2247401
The device has a pulse generator, whose output is connected to the measuring and reference arms connected to the measuring and reference arms of the variable-induction pickup, circuit providing for separation of the pulse of mismatch between the durations of the transparent processes in the measuring and reference arms. The duration of the mismatch pulse is determined by the difference of the parameters of the inductance coils of the measuring and reference arms. Each arm of the pickup has an inductance coil, transistor and a capacitor. The transistor bases are connected to the output of the pulse generator. The signal ends of the inductance coils are connected to the transistor emitters and to the comparison inputs of the comparators. The other ends of the coils are connected to a common bus. Capacitors are cut in between the transistor collectors and emitters. The collectors of both transistors are connected to the voltage source.
Super-high frequency method of measurement of dielectric permeability and thickness of dielectric plates / 2249178
Electromagnet wave is induced by means of directed aerial. The wave is incident to dielectric plate. Brusterain angle of incident wave is defined from minimum value of reflected wave and value of dielectric permeability is calculated. Power of incident and reflected waves are measured and the value of reflectivity and specific conductivity are calculated as well as value of dielectric loss of dielectric plate. Then incident angle of electromagnet wave is increased till achieving value providing total internal reflection of electromagnet wave and attenuation of intensity is measured at normal plane relatively direction of wave propagation. Factors of normal attenuation and thickness of dielectric plate are calculated. Method allows to find complex dielectric permeability and thickness of dielectric plates free of dielectric substrates.
Microwave method of measurement of magneto-dielectric parameters and thickness of spin coatings on surface of metal / 2251073
Device is proposed for measurement of dielectric and magnetic permeability as well as thickness of spin coatings on surface of metal and can be used in chemical industry for inspecting composition and properties of liquid and solid media. Electro-magnetic field is induced in body of dielectric material to be inspected which material is applied onto dielectric substrate, by means of sequent excitation of slow surface waves: two E-waves are excited at different, but having almost the same value, wavelengths λr1 and λr2 and one H-wave having wavelength of λr3. Attenuation of field intensity is measured t normal plane in relation to direction of wave propagation by means of receiving vibrators system for different values of base d between them. Normal attenuation factors αE1,αE2 and αH are found from ratio of E(y)= E0 exp[-α(y) y]. Magnetic and dielectric permeability and thickness of magneto-dielectric coating are found from relations of
Device for measuring permittivity of dielectrics / 2251705
Device comprises indication unit, electronic measuring unit, sensor, and control members. The indication unit and measuring electronic unit are mounted in a single housing. The sensor is a cylindrical plate-type capacitor.
 Method of measuring permittivity of dielectrics / 2251706
Method comprises determining permittivity of petrol. The permittivity of petrol is measured in the identification numbers. The reference points of the liner scale of a measuring instrument are assumed to be the values of the permittivity of chemically pure heptane and toluene. The measurements are performed by submerging the sensor of the measuring instrument into the study petrol. The value of permittivity is determined from the formula proposed.
Method for measuring complex dielectric penetrability of low-impedance materials on uhf and device for realization of said method / 2253123
Method and device are used for performing measurements of complex dielectric penetrability of low-impedance materials, having rough surface, by resonator method. According to inventive method, standard short circuit locker and two additional standard short circuit lockers are used, smooth one and rough one, then resonance frequency and Q-factor of resonator are measured with standard short circuit lockers and measured material sample, on basis of received results values of complex dielectric penetrability are calculated.
 Dielectric moisture meter / 2254569
Dielectric moisture meter comprises two frequency dividers, recording pulse generators, and AND/OR elements. The output of the reference generator is connected with the first input of the AND/OR element, input of the recording pulse generator, and input of the first frequency divider. The first output of the first divider is connected with the input of the pulse generator. The second output is connected with the second input of the AND/OR element through the phase frequency self-adjusting unit, automatic controllable generator and second frequency divider and input of the recording pulse generator. The first output of the pulse recording generator is connected to the input of the digital voltmeter through the cadence input of the pulse generator. The output of the subtracting device is connected with the second output. The cadence output of the subtracting device of scaling is connected with the outputs of the digital voltmeter through the subtracting device. The cadence input of the subtracting device is connected with the output of the AND/NOT element. The outputs of the scaling device are connected with the inputs of the digital voltmeter through subtracting device.
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FIELD: measuring engineering. SUBSTANCE: method comprises determining permittivity of petrol. The permittivity of petrol is measured in the identification numbers. The reference points of the liner scale of a measuring instrument are assumed to be the values of the permittivity of chemically pure heptane and toluene. The measurements are performed by submerging the sensor of the measuring instrument into the study petrol. The value of permittivity is determined from the formula proposed. EFFECT: enhanced accuracy of measuring. 2 cl, 5 app
The invention relates to measurement techniques, in particular to a method of measuring the dielectric constant of the dielectric environments, and can be used in electronic and petrochemical industries in the process of measuring and controlling the dielectric constant of the dielectric medium. As a rule, in the process of measuring the dielectric constant of the dielectric environments, the measurement results are displayed on the display device, printed measuring scale. However, all currently existing scales do not give high accuracy of the measurement of the dielectric constant. Current methods of measurement of physical quantities and their measurement scale standardized GOST 5365-73. There are also known solutions in the technology of measurement of physical quantities, are protected by copyright certificates No. 1383095 A1 from 09.07.1980, class: G 01 D 13/04 was investigated (2nd column) and No. 1569747 A1 from 19.02.1988, class: G 01 R 27/26. However, all these methods of measurement do not allow with sufficient accuracy and simplicity to display indicators of the dielectric constant. As the closest analogue (prototype) of the claimed technical solution is known a method of measuring the dielectric constant of the fluids described in the author's certificate of the USSR No. A from 24.04.1989,, class: G 01 R 27/26). In the specified way the value of the dielectric permittivity measured by irradiation of the investigated liquid electromagnetic wave with linear polarization through the dielectric prism with obtaining ellipsometric parameters of the reflected wave and then determine the magnitude of the dielectric constant based on linking it with the wavelength corresponding to the minimum ellipticity. However, this method has significant disadvantages, for example, it is technically difficult, time consuming and, as the above solution does not have the accuracy required in measuring the dielectric constant. The essence of the method To measure the dielectric constant of any liquid combustible substances, such as gasoline And 76 - AI 98, take calibration (gastromony) standard. The indices of the dielectric constant of the liquid combustible substances correspond to the indices of the dielectric constant of compounds such as, “heptane” - 1,927; “hexane” - 1,90; “isooctane” - 1,943; “octane” - 1,946; “pentane” - 1,843 etc. to Distinguish and perceive numerical indices of the dielectric constant at the specified value (after 1 there are three numbers) is quite difficult. For the main group of oil products produced by industry, index permeable dielectric is t ε as a rule, is in the range of 1.8-2.0. Experimentally proved, that the main differences εfor example, for gasoline are in the second, the third sign after a comma, for gastromony, for example, heptane, and other gasoline. If you measure the gasoline, as a reference it is proposed to use “heptane” ε=1,927, then the accuracy of the measurement should be an order of magnitude above the last decimal place, i.e., the measurement error can reach ±0,0001, and the measurement result is 1,9271-1,9269. This means that the percentage error should not exceed ±0,01%. Proposed numerical values of the dielectric constant obtained by measuring, for example, hydrocarbon liquids present in conventional units or “identity units” (“And”). Thus, the performance values of the identification numbers derive their dielectric constant. An example of measuring ε gasoline in the identification And numbers. Taken at the control point of the linear scale of the instrument (lower and upper point) value ε chemically pure, kostrounova heptane and toluene, which are 1,927 and 2,378 respectively. Thus: And=“0” - corresponds to heptane its value ε=1,927 (bottom). And=“88” - corresponds to toluene E. what about the value ε =2,378 (the top point). Formula translation of the dielectric constant of identification numbers: And=195,122 (ε-1,927), where: 195,122 - the number obtained on the basis of experiments. 1,927 value of ε heptane. Hence: value ε is determined by the formula: ε=And/195,122+1,927. The claimed method of measuring the dielectric constant allows hundreds of times to increase the accuracy of measurements. Identification numerical values are more accurate for the record εthey are easily perceived, remembered and compared. Main range of measured values, And ranges from “0” to “100” conventional units or identification units. The upper reference point is the identification number “100”, which corresponds to a dielectric constant that is determined by the formula: εmax=100/195,122+1,927=2,4395. Each petroleum product, such as gasoline, has its own identification number, which allows its identification at all stages of production, transportation, storage and marketing. The same brand of gasoline produced at different factories have different identification number that allows you to identify the manufacturer of the products. The indicator “identification number” can be used to classify and control the dielectric is of recov: diesel fuels, oils, gases, aqueous solutions, alcohols, etc. The proposed method allows hundreds of times, almost 200 times, to increase the accuracy of measurements. All existing devices that are used to measure the dielectric constant, can be transferred for measuring ε identification number. Below is the analysis of petroleum products on the instrument AAS-2000. As samples were taken gasoline at different petrol stations in the city of Krasnodar and the Krasnodar territory. Sample analysis was performed in parallel on three devices AES-2000. For each series of tests took the sample of the fuel was mixed and measured in the position of the sensor (measuring head) of the device on the bottom of the tank with the analyzed sample and the weight. The sensor in position on the bottom was put in a glass with a speed of one second and four seconds, to determine the dependence of the differences identification number from the speed measurement. We also made measurements of the index of “And”, but in the position of the sensor on weight. Similar tests conducted with the same sample of oil after settling samples within thirty minutes. The test results are attached (see table 1-5). The data obtained indicate that the proposed method of measuring the dielectric permittivity of the dielectric is historical environments allows to determine the dielectric properties of a non-conductive fluid through the indicator “identification number”. In addition, the numerical values of this index can accurately determine the index of the mixture in the analyzed fuel.
1. The method of measuring the dielectric constant of gasoline, which consists in conducting the measurement and subsequent measurement of dielectric permittivity, characterized in that the measured dielectric constant of gasoline in the identification And numbers for reference point linear scale measuring device accept the values of dielectric permeability of chemically pure heptane and toluene, with an identification number And a=0 corresponds to the value of ε=1,927, and identification number And=88 corresponds to the value of ε=2,378, measured by periodically lowering the sensor of the measuring device in the test gas, and the value of the dielectric constant is determined by the formula ε=And/195,122+1,927, where ε - the value of dielectric permeability; And - the identification number shown on the meter scale in the interval starting from 0 to 100; 195,22 - the number obtained experimentally; 1,927 - index dielectric permittivity of heptane. 2. The method according to claim 1, characterized in that the upper reference point is the identification number 100, which corresponds to a dielectric constant that is determined by the formula εmax=100/195,122+1,927=2,4395. 3. The method according to claim 1, characterized in that the frequency lowering and lifting the sensor of the measuring device in the test gas is 2-4 C.
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