Device for measurement of high values of complex permittivity of low-impedance materials at microwave frequencies |
|
IPC classes for russian patent Device for measurement of high values of complex permittivity of low-impedance materials at microwave frequencies (RU 2247399):
        
 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
 The way the local distance measurements at high frequencies concentration of carriers / 2234709
The invention relates to the field of measuring equipment
The method of measurement of complex permittivity of low-impedance composite materials for microwave / 2234103
The invention relates to the field of measurement of electrical quantities in the microwave range
 Method for determination of dielectric properties of water and its solutions in the low frequency range by the l-cells / 2234102
The invention relates to physical methods of investigation of the state of water and its solutions in various objects and can be used when solving fundamental and applied problems of water systems
 Non-contact method of determining the dielectric constant of solid and liquid dielectrics / 2234075
The invention relates to electrical engineering and can be used, for example, to check the quality of solid and liquid insulating materials
 Device for measuring the capacitance of the capacitor sensor / 2231801
The invention relates to measuring technique and can be used in the means for counting events short-changing the capacity of the condenser sensor
 A device for determining parameters of the impedance / 2231800
The invention relates to electrical measurements, in particular to the measurement of parameters of capacitors, and can be used to build high-performance automatic devices to control and sorting of components such as capacitors or coils, inductances electric parameters in terms of their mass production
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.
|
FIELD: radio measurements of low-impedance dielectric materials at microwave frequencies, in particular, measurement of the complex relative permittivity and the loss tangent of a dielectric of composite materials characterized by high values of complex relative permittivity SUBSTANCE: 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. EFFECT: enhanced precision of measurement of the value of the complex permittivity of low-impedance materials at microwave frequencies, having high values of complex permittivity 2 cl
The invention relates to the field of radio parameters absorbing a low-impedance dielectric materials at microwave, in particular to the measurement of complex relative permittivity and tangent of dielectric loss angle of composite materials, characterized by large values of the complex relative permittivity The closest to the technical nature of the claimed invention is selected as a prototype device for measuring complex permittivity of the indirect method, comprising: a microwave generator, a measuring device for measuring the complex reflection coefficient, rectangular waveguide, short-circuited at one end, with a longitudinal slit on the side, which in the measurement process closes the reference coreconnection or measured sample [see RF Patent №2199760, BI No. 6, 2003]. The measurement is carried out in two stages: first measurement of the complex reflection coefficient from the reference corodinates, then from the measured sample, the results of measurements of the complex reflection coefficients of the computation of the complex dielectric permittivity of the material being measured. For reasons prepyatstvyy the achievement of specified following technical result when using the known device, taken as a prototype, is that in the known device is not sufficient to accurately define the value of complex permittivity of low-impedance dielectric materials. These limitations on the accuracy gives waveguide measurement method. The invention consists in improving the accuracy of measuring the dielectric permittivity of the low impedance of composite materials. To do this in the waveguide path is created waveguide cavity standing wave, formed of a short-circuited waveguide with a longitudinal slit, separated from the waveguide path aperture, running on the reflection of electromagnetic waves. The measured parameters are the resonance frequency and the quality factor of the resonator. The technical result - the possibility of more accurate measurement of complex permittivity of low-impedance dielectric materials at microwave with large values of complex dielectric permittivity This technical result in the implementation of the invention is achieved by the known is a device for measurement of complex permittivity of low impedance materials at microwave, containing a microwave generator, which is connected to the measuring device, connected to a short-circuited rectangular waveguide with a longitudinal slit on the side, which in the measurement process closes the reference coreconnection or measured sample. The peculiarity lies in the fact that there is a standing wave resonator, made of a short-circuited waveguide with a longitudinal slit on the side, separated by the diaphragm from the waveguide path. In addition, the peculiarity lies in the fact that as a measuring device of the complex reflection coefficient is used device for measuring the resonant frequency and quality factor of the resonator. Conducted by the applicant's analysis of the prior art, including searching by the patent and scientific and technical information sources and identify sources that contain information about the equivalents of the claimed invention, has allowed to establish that the applicant had not discovered similar, characterized by signs, identical with all the essential features of the claimed invention. The definition from the list of identified unique prototype, as the most similar in essential features analogue, has identified a set of essential towards perceived by the applicant to the technical result of the profile is part of the signs in the inventive device, set forth in the claims. Therefore, the claimed invention meets the condition of “novelty”. To verify compliance of the claimed invention the term “inventive step”, the applicant conducted an additional search of the known solutions, in order to identify signs consistent with a non-prototype features of the claimed device. The search results showed that the claimed invention not apparent to the expert in the obvious way from the prior art because the prior art defined by the applicant, not the influence provided the essential features of the claimed invention transformations on the achievement of the technical result, in particular, the claimed invention does not provide for the following requirements: - addition of known means of any known part attached to it according to certain rules to achieve a technical result, in respect of which it is the effect of such additions; - replacement of any part of the other known means known part to achieve a technical result, in respect of which it is the effect of such a change; - the exclusion of any part of the funds while the exclusion of its functions and the achievement is due to f is a function and achievement with the usual result of such exclusion; - increasing the number of identical elements to enhance the technical result due to the presence in the vehicle is of such elements; - execution of a known drug or part of a known material to achieve a technical result due to the known properties of this material; - creation of tools, consisting of well-known parts, the choice of which and the relationship between them is carried out on the basis of known rules, recommendations and achievable technical result is due only to the known properties of the parts of this tool and the relationships between others. The described invention is not based on the change of the quantitative trait, the submission of such evidence in the relationship, or change its appearance. This refers to the case when the known fact of the influence of each of these features on the technical result, and the new values for these characteristics or their relationship could be obtained from the known dependency relationships. Therefore, the claimed invention meets the condition of “inventive step”. Information confirming the ability of the invention to provide the above technical result is the following. The device comprises a microwave generator, a standing wave resonator, the implementation of the tion of the waveguide with a longitudinal slit on the side wall and the aperture in the waveguide path, device for measuring the resonant frequency and quality factor of the resonator, reference coreconnection and the measured sample [see Jaltman devices microwave. - M.: Publishing house “Mir”, 1968. - 231 S.]. The operation of the device is as follows. The cavity standing wave, consisting of the diaphragm and the short-circuited waveguide on the side wall of which is made a longitudinal slit long length, parallel to the axis of the waveguide, supplied with matching bevels, which in the measurement process closes the reference coreconnection or measured by the sample, is connected to the measuring circuit and the microwave generator, the measured resonance frequency and the quality factor of the resonator. From the microwave generator through the waveguide is served probing electromagnetic wave, which through hole connection aperture branches in the resonator. First measurement of resonant frequency and quality factor of the cavity standing wave with a reference coreconnection, then measurement of resonant frequency and quality factor of the cavity traveling wave with the measured sample, which is installed in place of the reference corodinates. The results of resonant frequency and quality factor of the resonator with the measured material and the reference coreconnection value is calculated complex dielectric permittivity and the measured material. Thus, the above data confirm that the implementation of the use of the claimed device the following set of conditions: the tool embodying the claimed device in its implementation, is intended for use in industry, namely in the measurement of complex permittivity of low impedance materials; - for the claimed device as it is described in the independent clause sets out the claims, confirmed the possibility of its implementation using the steps described in the application or known before the priority date tools and methods; the tool embodying the claimed invention in its implementation, is able to achieve perceived by the applicant of the technical result. Therefore, the claimed invention meets the condition of “industrial applicability”. 1. Device for measuring complex permittivity of low impedance materials at microwave containing a microwave generator, which is connected to the measuring device, the reflectance of which is connected to the short-circuited rectangular waveguide with a longitudinal slit on the side, which in the measurement process closes the reference coreconnection or measured sample different is seesa fact, the use of a standing wave resonator, made of a short-circuited waveguide with a longitudinal slit on the side, separated by the diaphragm from the waveguide path. 2. The device according to claim 1, characterized in that a measuring device of the complex reflection coefficient is used device for measuring the resonant frequency and quality factor of the resonator.
|