CN217901889U - Variable-temperature rock dielectric property testing device - Google Patents
Variable-temperature rock dielectric property testing device Download PDFInfo
- Publication number
- CN217901889U CN217901889U CN202221348687.4U CN202221348687U CN217901889U CN 217901889 U CN217901889 U CN 217901889U CN 202221348687 U CN202221348687 U CN 202221348687U CN 217901889 U CN217901889 U CN 217901889U
- Authority
- CN
- China
- Prior art keywords
- temperature
- water
- cooling
- base
- cooling base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The utility model discloses a temperature-variable rock dielectric property testing device, which relates to the technical field of microwave and comprises a temperature controller, a vector network analyzer and a dielectric property testing operation platform; has the advantages that: the heating box is arranged on the slide rail to slide to adjust the position, so that the accuracy of the heating position is ensured, and the heating efficiency is improved; the first guide rail and the second guide rail are arranged to enable the support to slide, the limiting device limits the right movement of the jacking plate, so that the inner part and the outer part of a rock sample are ensured to be in close contact with the inner conductor and the outer conductor of the high-temperature coaxial line, the influence of gaps on the precision of a measuring result is avoided, and the measuring error is reduced; the left water-cooling base and the right water-cooling base are arranged for cooling, so that damage and influence on the radio frequency coaxial adapter are avoided; set up the air pump and start to blow as required, influence manual operation when avoiding rock sample to have pungent smell.
Description
Technical Field
The utility model relates to a microwave technical field especially relates to a alternating temperature rock dielectric characteristic testing arrangement.
Background
The microwave-assisted mechanical rock breaking is an auxiliary technology with great application prospect in tunnel engineering construction. Hard rocks are usually encountered in the rock breaking process of the tunnel boring machine, the rock breaking hob bears large impact load, and the hob ring and the bearing of key parts of the hob are easy to damage, so that the construction efficiency is influenced. The microwave equipment can be used for rapidly heating the rock, the thermal stress causes microcracks in the rock to crack and expand, and the mechanical properties such as the strength of the rock are reduced, so that the microwave-assisted mechanical rock breaking can be used for improving the rock breaking efficiency in the tunnel construction process, reducing the loss of the mechanical equipment and reducing the construction cost.
The dielectric property of the rock reflects the microwave absorption capacity of the rock, and the stronger the dielectric property is, the stronger the microwave absorption capacity of the rock is, and the better the microwave heating effect is. A set of temperature-variable rock dielectric property testing device is designed to measure influence factors such as dielectric constant, dielectric loss tangent and the like. Before the microwave-assisted rock breaking, it is necessary to accurately know the dielectric properties of rocks on a construction road section. Common rocks in a tunnel construction site are selected to be subjected to dielectric property test pair testing under the condition of variable temperature, a construction road section suitable for microwave-assisted rock breaking is screened, and important reference and guiding significance is provided for realizing engineering application of microwave-assisted mechanical rock breaking.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a alternating temperature rock dielectric property testing arrangement for solving above-mentioned problem.
The utility model discloses a following technical scheme realizes above-mentioned purpose:
a temperature-changing rock dielectric property testing device comprises a temperature controller, a vector network analyzer and a dielectric property testing operation platform, wherein the dielectric property testing operation platform comprises a base, two first guide rails arranged in parallel are fixedly mounted on the right side of the upper surface of the base, a jacking plate is arranged on the first guide rails in a sliding manner, a stressed plate is fixedly mounted at the left end of the jacking plate, a right water-cooling base is fixedly mounted at the left side of the stressed plate, a second guide rail is fixedly mounted on the base corresponding to the position of the right water-cooling base, the right water-cooling base slides on the second guide rail, a left water-cooling base fixedly mounted on the base is arranged on the left side of the right water-cooling base, a high-temperature coaxial wire is arranged between the left water-cooling base and the right water-cooling base, coaxial wires are fixedly connected to the left side and the right side of the high-temperature coaxial wire respectively, water-cooling coaxial wires are arranged on the left water-cooling base and the right water-cooling base in a penetrating manner, the water-cooling coaxial wires are fixedly connected with the left side of the heat-insulating coaxial wire, a left water-cooling base is fixedly mounted with a left radio-frequency coaxial adapter corresponding to the right coaxial adapter, and a radio-frequency coaxial adapter is arranged on the right coaxial adapter; the heating box is arranged on the rear side of the high-temperature coaxial line, a slide rail is fixedly arranged on the upper surface of the base corresponding to the heating box, the heating box slides on the slide rail, an electromagnetic heating ring is fixedly arranged on the front side of the heating box, and the high-temperature coaxial line is wrapped by the electromagnetic heating ring; the high-temperature coaxial line comprises a sample holder and high-temperature connectors on the left side and the right side of the sample holder, and inner conductors which are inserted in a left-right mode are arranged in the sample holder and the high-temperature connectors; the vector network analyzer is respectively connected with the left radio frequency coaxial adapter and the left radio frequency coaxial adapter through the waveguide tube; and a thermocouple of the temperature controller is inserted into the high-temperature coaxial line.
Preferably, the following components: the rock sample to be tested is placed in a sample holder surrounded by an electromagnetic heating coil.
Preferably, the following components: the clamping device comprises a clamping block and a limiting rack, the clamping block is movably arranged on the tightening plate from top to bottom, a supporting spring is fixedly arranged between the lower portion of the clamping block and the tightening plate, teeth are fixedly arranged on the lower surface of the tightening plate in an extending mode, and the upper surface of the base corresponds to the position of the clamping block which is fixedly provided with the limiting rack.
Preferably: the high-temperature coaxial line is characterized by further comprising an air pump, wherein the air pump extends to the upper part of the high-temperature coaxial line through a pipeline.
Preferably: the heating box temperature adjustable, temperature range: room temperature-600 ℃, equipment testing frequency of 0.9-5 GHz, control temperature precision: less than or equal to 4 percent.
Preferably, the following components: and the upper surfaces of the left water-cooling base and the right water-cooling base are provided with a cooling water inlet and a cooling water outlet and are connected with an external water supply pipe.
Compared with the prior art, the beneficial effects of the utility model reside in that: the heating box is arranged on the slide rail to slide to adjust the position, so that the accuracy of the heating position is ensured, and the heating efficiency is improved; the first guide rail and the second guide rail are arranged to enable the support to slide, the limit device limits the right movement of the jacking plate, the inner part and the outer part of the rock sample are ensured to be in close contact with the inner conductor and the outer conductor of the high-temperature coaxial line, the gap is prevented from influencing the precision of a measuring result, and the measuring error is reduced; the left water-cooling base and the right water-cooling base are arranged for cooling, so that damage and influence on the radio frequency coaxial adapter are avoided; an air pump is arranged to start blowing according to needs, so that manual operation is prevented from being influenced when the rock sample has pungent smell; by analyzing the influence of temperature on dielectric properties, in the follow-up microwave-assisted rock breaking process, the damage mechanism of the temperature on rock mass can be combined, the microwave-assisted rock breaking is carried out on different rocks under the conditions of good microwave absorption performance and high rock breaking degree, the energy consumption is reduced, and the rock breaking efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of the temperature-variable rock dielectric property testing device of the present invention.
Fig. 2 is a front view of the dielectric characteristic testing operation platform of the temperature-variable rock dielectric characteristic testing device of the present invention.
Fig. 3 is a schematic diagram of a three-dimensional structure at a first viewing angle of the device for testing dielectric properties of rock at varying temperatures according to the present invention.
Fig. 4 is a schematic perspective view of a second viewing angle of the device for testing dielectric properties of rock with variable temperature according to the present invention.
Fig. 5 is a schematic structural diagram of a calibration set and a rock sample of the temperature-variable rock dielectric property testing device of the present invention.
The reference numerals are explained below:
1. a temperature controller; 2. a vector network analyzer; 3. a dielectric property testing operation platform; 4. a heating box; 5. a slide rail; 6. a base; 7. a first guide rail; 8. a limiting rack; 9. a jacking plate; 10. high-temperature coaxial lines; 11. a high temperature joint; 12. a left water-cooled base; 13. a right water-cooled base; 14. a limiting device; 15. a sample holder; 16. an electromagnetic heating coil; 17. a right radio frequency coaxial adapter; 18. a second guide rail; 19. a stress plate; 20. a left radio frequency coaxial adapter; 21. heat-insulating coaxial lines; 23. a calibration piece is directly connected; 24. a standard calibration piece; 25. a rock sample.
Detailed Description
In the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore are not to be construed as limiting the present invention, and further, the terms "first", "second", and the like are used only for descriptive purposes and are not intended to indicate or imply relative importance or to implicitly indicate the number of technical features being referred to, whereby the features defined as "first", "second", and the like may explicitly or implicitly include one or more such features, and in the description of the present invention, unless otherwise indicated, the terms "plurality" means two or more than two.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or the two elements may be connected through an intermediate medium, and the specific meaning of the above terms in the present invention can be understood by those skilled in the art through specific situations.
The present invention will be further explained with reference to the accompanying drawings:
as shown in fig. 1-5, a temperature-variable rock dielectric property testing device comprises a temperature controller 1, a vector network analyzer 2 and a dielectric property testing operation platform 3, the dielectric characteristic test operating platform 3 comprises a base 6, the base 6 is used for supporting, two first guide rails 7 which are arranged in parallel are fixedly arranged on the right side of the upper surface of the base 6, the first guide rail 7 is provided with a jacking plate 9 in a sliding way, the left end of the jacking plate 9 is fixedly provided with a stress plate 19, the stress plate 19 is used for transferring force, a right water-cooling base 13 is fixedly arranged on the left side of the stress plate 19, a second guide rail 18 is fixedly arranged on the base 6 corresponding to the right water-cooling base 13, the first guide rail 7 and the second guide rail 18 are respectively used for guiding movement, the right water-cooling base 13 slides on the second guide rail 18, the left side of the right water-cooling base 13 is provided with a left water-cooling base 12 fixedly arranged on the base 6, the left water-cooling base 12 and the right water-cooling base 13 are respectively used for cooling, a high-temperature coaxial line 10 is arranged between the left water-cooling base 12 and the right water-cooling base 13, the left side and the right side of the high-temperature coaxial line 10 are respectively and fixedly connected with a heat insulation coaxial line 21, the left water-cooling base 12 and the right water-cooling base 13 are both provided with water-cooling coaxial lines in a penetrating way, the water-cooling coaxial lines are fixedly connected with the heat insulation coaxial lines 21, a left radio frequency coaxial adapter 20 is fixedly arranged on the left side surface of the left water-cooling base 12 corresponding to the water-cooling coaxial line, the heat insulation coaxial line 21 and the high temperature coaxial line 10 are respectively used for guiding waves, the right side surface of the right water-cooling base 13 is fixedly provided with a right radio frequency coaxial adapter 17 corresponding to the water-cooling coaxial line, the stress plate 19 is provided with a through hole corresponding to the right radio frequency coaxial adapter 17; the heating box 4 is arranged on the rear side of the high-temperature coaxial line 10, the heating box 4 is used for heating, a slide rail 5 is fixedly mounted on the upper surface of the base 6 corresponding to the position of the heating box 4, the slide rail 5 is used for directional sliding, the heating box 4 slides on the slide rail 5, an electromagnetic heating ring 16 is fixedly mounted on the front side of the heating box 4, the electromagnetic heating ring 16 is used for heating, and the high-temperature coaxial line 10 is wrapped by the electromagnetic heating ring 16; the high-temperature coaxial line 10 comprises a sample holder 15 and high-temperature connectors 11 on the left side and the right side of the sample holder 15, and inner conductors which are inserted in a left-right mode are arranged inside the sample holder 15 and the high-temperature connectors 11; the vector network analyzer 2 is respectively connected with the left radio frequency coaxial adapter 20 and the left radio frequency coaxial adapter 20 through waveguide tubes; a thermocouple of the temperature controller 1 is inserted into the high-temperature coaxial line 10; the rock sample 25 to be tested is placed in the sample holder 15 surrounded by the electromagnetic heating coil 16; a limiting device 14 is fixedly mounted on the tightening plate 9, the limiting device 14 comprises a clamping block and a limiting rack 8, the clamping block moves up and down on the tightening plate 9, a supporting spring is fixedly mounted between the lower portion of the clamping block and the tightening plate 9 and used for supporting and resetting, teeth are fixedly mounted on the lower surface of the tightening plate 9, which extends out of the lower end of the clamping block, teeth are fixedly mounted on the upper surface of the base 6, the limiting rack 8 is fixedly mounted corresponding to the position of the clamping block, and the limiting rack 8 and the clamping block are locked in a matching mode; the air pump extends to the position above the high-temperature coaxial line 10 through a pipeline; the temperature of the heating box 4 is adjustable, and the temperature range is as follows: the room temperature is 600 ℃, the test frequency of the equipment is 0.9-5 GHz, and the control temperature precision is as follows: less than or equal to 4 percent; the water cooling device comprises a left water-cooling base 12, a right water-cooling base 13, a straight-through calibrating piece 23, a standard calibrating piece 24 and a rock sample 25, wherein the upper surfaces of the left water-cooling base 12 and the right water-cooling base 13 are both provided with a cooling water inlet and a cooling water outlet and are connected with an external water supply pipe, and the standard calibrating piece 24 is made of polytetrafluoroethylene.
The accuracy of measuring the dielectric characteristic parameters of the rock sample 25 should meet the following requirements:
The straight-through calibration piece 23 and the standard calibration piece 24 are made of metal materials with high hardness, annealing treatment is firstly carried out on the materials before processing, and polishing and anti-oxidation treatment are carried out on the port of the calibration piece and the surface serving as a test port after processing, so that the stability of the shapes and the surface electrical properties of the calibration piece and the test seat in the calibration process is ensured.
The variable-temperature rock dielectric property testing device software used by the external computer utilizes the drive software of SICL (Standard Instrument control library) and VISA (virtual Instrument software Structure) to complete the drive, control and management of the instrument and equipment on the basis of the vector network analyzer 2 and the equipment self-contained software.
Before the variable-temperature rock dielectric property test system tests a rock sample 25, a test system host must be calibrated to solve the problems of establishment of calibration pieces, calibration of system errors and the like, the test system adopts a TRL (Thru-reflex-Line) calibration technology to carry out through calibration, reflection calibration and transmission Line calibration to accurately measure a precise coaxial system and non-coaxial systems such as waveguides and microstrip lines, the calibration pieces are made of high-hardness alloys and made of national standard flanges, and the calibration pieces comprise three test calibration pieces, namely a transmission Line calibration piece, a through calibration piece 23 and a standard calibration piece 24.
When the transmission line calibration piece is calibrated, the insertion phase of the transmission line should be between 20 degrees and 160 degrees in the used frequency range, the characteristic impedance of the transmission line and the characteristic impedance of the test port are consistent, and the connection part cannot have discontinuity or step mutation so as to ensure the transmission without reflection.
The working principle is as follows: when in use, the installation process is as follows: placing a rock sample 25 in a sample holder 15, pulling the clamping block upwards, compressing the supporting spring, separating the clamping block from the limiting rack 8, pushing a tightening plate 9 to move leftwards, clamping the sample holder 15 by a high-temperature joint 11, enabling the inside and the outside of the rock sample 25 to be in close contact with the inner conductor and the outer conductor of a high-temperature coaxial line 10, loosening the clamping block, enabling teeth at the lower end of the clamping block to be meshed with the limiting rack 8 to realize locking, pushing a heating box 4 to slide on a sliding rail 5, adjusting the position of an electromagnetic heating ring 16 to enable the sample holder 15 and the rock sample 25 to be located in a heating effective area of the electromagnetic heating ring 16, respectively connecting a vector network analyzer 2 with a left radio-frequency coaxial adapter 20 and a left radio-frequency coaxial adapter 20 through a waveguide tube, inserting a thermocouple of a temperature controller 1 into the high-temperature coaxial line 10, and connecting the vector network analyzer 2 with an external computer; the test process is as follows:
when the test environment is normal temperature measurement:
1. initializing equipment and instruments before testing by the variable-temperature rock dielectric property testing device to ensure the normality of the equipment and instruments;
2. selecting a standard calibration piece 24 to respectively carry out straight-through calibration, reflection calibration and transmission line calibration to finish the calibration of the vector network analyzer 2;
3. the variable-temperature rock dielectric property testing device tests the dielectric property of the polytetrafluoroethylene standard component at normal temperature, and the polytetrafluoroethylene standard sample is used for judging whether the system calibration is successful or not; (test results the standard value of the dielectric constant of the polytetrafluoroethylene is about 2.07, and the error of 10 percent indicates that the system is successfully calibrated)
4. After the calibration is finished, the hollow columnar rock sample 25 is loaded for dielectric property testing, the end faces are required to be aligned and cannot be jacked into the coaxial lines at the two ends during sample assembly, and then the size of the sample is input in software for dielectric property parameter testing.
5. The microwave signal sent by the vector network analyzer 2 is accessed through the right radio frequency coaxial adapter 17 and passes through the tested rock sample 25 through the coaxial line, and the vector network analyzer 2 collects the feedback microwave signal from the left radio frequency coaxial adapter 20 for calculation to obtain the dielectric constant and dielectric loss of the tested sample material and transmits the analysis result to the computer.
When the test environment is at a variable measurement temperature:
1. before testing, the water cooling machine and the temperature control box are opened, if the sample has larger volatility, the air pump can be opened to blow air to the position of the rock sample 25, the air quantity needs to be adjusted to be small, otherwise the temperature is influenced or the sample is displaced, the heating box 4 is pushed to slide on the slide rail 5, the position of the electromagnetic heating ring 16 is adjusted, the sample holder 15 and the rock sample 25 are positioned in a heating effective area of the electromagnetic heating ring 16, and the size of the sample is input;
2. after each temperature point is tested, clicking 'save data' to obtain the dielectric constant and the dielectric loss of the tested sample material, keeping the analysis result to a computer, then inputting the next temperature point, clicking 'test after calibration' to test the next temperature point data;
3. after testing of all temperature points is completed, the high-temperature coaxial line 10 is pulled open, the air pump is opened to the maximum for cooling, and the water cooling machine can be closed after cooling is completed.
The temperature controller 1, the vector network analyzer 2, the left water-cooled base 12, the right water-cooled base 13, the electromagnetic heating coil 16, the right radio frequency coaxial adapter 17 and the left radio frequency coaxial adapter 20 are all universal standard components or components known to those skilled in the art, and the structure and principle thereof are known to those skilled in the art through technical manuals or through conventional experimental methods, so that the description thereof is omitted here.
The foregoing shows and describes the basic principles, essential features and advantages of the present invention, and it will be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, and that what has been described in the foregoing embodiments and specification is merely illustrative of the principles of the present invention.
Claims (6)
1. The utility model provides a alternating temperature rock dielectric property testing arrangement, includes temperature controller (1), vector network analysis appearance (2) and dielectric property test operation platform (3), its characterized in that: dielectric property test operation platform (3) includes base (6), base (6) upper surface right side fixed mounting has two parallel arrangement's first guide rail (7), it has top grip block (9) to slide on first guide rail (7), top grip block (9) left end fixed mounting has atress board (19), atress board (19) left side fixed mounting has right water-cooling base (13), base (6) correspond right water-cooling base (13) fixed mounting has second guide rail (18), right side water-cooling base (13) are in slide on second guide rail (18), right side water-cooling base (13) left side is provided with fixed mounting and is in left water-cooling base (12) on base (6), be provided with high temperature coaxial line (10) between left side water-cooling base (12) and right water-cooling base (13), high temperature coaxial line (10) left and right sides difference fixedly connected with heat-insulating coaxial line (21), all wear to be equipped with water-cooling coaxial line on left side water-cooling base (12) and right water-cooling base (13), water-cooling coaxial line (21) fixed connection, left side water-cooling base (12) corresponds right water-cooling base (13) and right side coaxial line fixed mounting and right water-cooling adapter (17) is in the face radio frequency coaxial line adapter (17), the stress plate (19) is provided with a through hole corresponding to the right radio frequency coaxial adapter (17); a heating box (4) is arranged on the rear side of the high-temperature coaxial wire (10), a sliding rail (5) is fixedly mounted on the upper surface of the base (6) corresponding to the position of the heating box (4), the heating box (4) slides on the sliding rail (5), an electromagnetic heating ring (16) is fixedly mounted on the front side of the heating box (4), and the high-temperature coaxial wire (10) is wrapped by the electromagnetic heating ring (16); the high-temperature coaxial line (10) comprises a sample holder (15) and high-temperature connectors (11) on the left side and the right side of the sample holder (15), wherein inner conductors which are inserted in a left-right mode are arranged inside the sample holder (15) and the high-temperature connectors (11); the vector network analyzer (2) is respectively connected with the left radio frequency coaxial adapter (20) and the left radio frequency coaxial adapter (20) through a waveguide tube; and a thermocouple of the temperature controller (1) is inserted into the high-temperature coaxial line (10).
2. The temperature-variable rock dielectric property testing device of claim 1, wherein: the rock sample (25) to be measured is placed in a sample holder (15) surrounded by an electromagnetic heating coil (16).
3. The temperature-changing rock dielectric property testing device according to claim 1, characterized in that: fixed mounting has stop device (14) on top pinch plate (9), stop device (14) include fixture block and spacing rack (8), the fixture block is in top pinch plate (9) is movable from top to bottom, the fixture block lower part with fixed mounting has supporting spring between top pinch plate (9), the fixture block lower extreme extends top pinch plate (9) lower fixed surface installs tooth, base (6) upper surface corresponds fixture block position fixed mounting has spacing rack (8).
4. The temperature-variable rock dielectric property testing device of claim 1, wherein: the high-temperature coaxial cable is characterized by further comprising an air pump, wherein the air pump extends to the position above the high-temperature coaxial cable (10) through a pipeline.
5. The temperature-changing rock dielectric property testing device according to claim 1, characterized in that: the temperature of the heating box (4) is adjustable, and the temperature range is as follows: the room temperature is 600 ℃, the test frequency of the equipment is 0.9-5 GHz, and the control temperature precision is as follows: less than or equal to 4 percent.
6. The temperature-changing rock dielectric property testing device according to claim 1, characterized in that: and the upper surfaces of the left water-cooling base (12) and the right water-cooling base (13) are provided with a cooling water inlet and a cooling water outlet and are connected with an external water supply pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221348687.4U CN217901889U (en) | 2022-06-01 | 2022-06-01 | Variable-temperature rock dielectric property testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221348687.4U CN217901889U (en) | 2022-06-01 | 2022-06-01 | Variable-temperature rock dielectric property testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217901889U true CN217901889U (en) | 2022-11-25 |
Family
ID=84111678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221348687.4U Active CN217901889U (en) | 2022-06-01 | 2022-06-01 | Variable-temperature rock dielectric property testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217901889U (en) |
-
2022
- 2022-06-01 CN CN202221348687.4U patent/CN217901889U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100568000C (en) | Dielectric materials high-temperature complex dielectric constant measuring method based on terminal short circuit | |
| CN102393490B (en) | Device for measuring high-temperature complex dielectric constants of dielectric material | |
| CN107543970B (en) | Dielectric constant measuring method based on database calibration method | |
| CN104090171B (en) | There is the material complex dielectric permittivity test system and method for perforate short board | |
| CN111157802B (en) | High-precision test method for microwave dielectric property of high-loss material | |
| CN106771897B (en) | GIS ultrahigh frequency partial discharge signal attenuation test system and method | |
| CN104391181A (en) | High temperature calibration device for testing microwave dielectric material and calibration method thereof | |
| CN217901889U (en) | Variable-temperature rock dielectric property testing device | |
| CN109782200B (en) | Material electromagnetic parameter measuring method | |
| CN113049883B (en) | Single fiber dielectric constant testing device based on coupling microstrip line | |
| CN114966227A (en) | Variable-temperature rock dielectric property testing device and testing method thereof | |
| CN110441646B (en) | GIL conducting rod connection evaluation system and method based on resistive potential difference ratio | |
| WO2019184177A1 (en) | Portable thermoelectric potential detector | |
| CN112763341A (en) | In-situ induction heating device for neutron diffraction measurement | |
| Skinner et al. | Characterizing precision coaxial air lines as reference standards for cryogenic S-parameter measurements at milli-Kelvin temperatures | |
| CN110058056B (en) | Non-standard test fixture | |
| CN108226684B (en) | Clamping rod attenuation distribution test fixture, test system and test method | |
| CN208060557U (en) | A kind of quick electromagnetic parameter testing jig | |
| CN114325103B (en) | Nondestructive testing device and method for thermal resistivity of carbon material | |
| Lanzi et al. | Differential and double-differential dielectric spectroscopy to measure complex permittivity in transmission lines | |
| CN111983319B (en) | Metal material microwave surface resistivity high-temperature testing device and testing method | |
| Meng et al. | A system to measure complex permittivity of low loss ceramics at microwave frequencies and over large temperature ranges | |
| Horibe et al. | Development of evaluation techniques for air lines in 3.5-and 1.0-mm line sizes | |
| Pohl et al. | Correction procedures for the measurement of permittivities with the cavity perturbation method | |
| CN217332632U (en) | Variable-temperature testing device for complex dielectric constant of strip line resonance method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |