CN106872916B - Ferrite detection device - Google Patents
Ferrite detection device Download PDFInfo
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- CN106872916B CN106872916B CN201710220032.6A CN201710220032A CN106872916B CN 106872916 B CN106872916 B CN 106872916B CN 201710220032 A CN201710220032 A CN 201710220032A CN 106872916 B CN106872916 B CN 106872916B
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- 238000001514 detection method Methods 0.000 title claims abstract description 76
- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 56
- 210000000078 claw Anatomy 0.000 claims abstract description 13
- 230000005291 magnetic effect Effects 0.000 claims description 20
- 238000000034 method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000005350 ferromagnetic resonance Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 230000005418 spin wave Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
- G01R33/1253—Measuring galvano-magnetic properties
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
The invention provides a ferrite detection device which can rapidly detect ferrite and ensure the stable position of the rest parts of the whole device, so that the detection is reliable and stable. The novel portable wireless power supply comprises a base, wherein an inner groove is formed in the center of the base, two signal wire access ends and a load are further arranged on the upper surface of the base, a lower shell is located in the inner groove, N concave locating holes are annularly distributed on the outer ring surface of the lower shell corresponding to the surface of the base, N is more than or equal to 2, a center concave hole is formed in the center of the lower shell, a lower detection assembly is located in the center concave hole, three pins are protruding on the outer ring side of the lower detection assembly, the three pins are respectively externally connected with two signal wire access ends and a load which are correspondingly connected with the corresponding positions of the three pins, each pin is guaranteed to be correspondingly provided with a unique external connection portion, the novel wireless power supply further comprises an upper shell, and N lower convex claws are protruding below the lower ring surface of the outer ring surface of the upper shell.
Description
Technical Field
The invention relates to the technical field of wireless communication equipment, in particular to a ferrite detection device.
Background
In the existing wireless communication system, the transmitter is an important component part and consists of a Power Amplifier (PA), a coupler, a circulator/isolator, a connector, a duplexer, an antenna and the like, wherein the coupler is used for the relevant monitoring function of a link, the circulator or the isolator (the isolator is formed by combining the circulator and a power absorption load) is used for protecting a power amplifier tube, and the connector transmits an output signal to the duplexer. Similar designs are used in the wireless field, but as wireless communications evolve, there is an increasing demand for miniaturization.
The microwave ferrite is also called gyromagnetic ferrite, and when plane polarized electromagnetic waves propagate in the ferrite according to a certain direction under the action of a high-frequency magnetic field, the polarization surface of the ferrite material can continuously rotate around the propagation direction. The magnetic resonance low-temperature magnetic resonance device has the performances of small ferromagnetic resonance line width, large spin wave resonance line width, low saturation magnetization, small magnetocrystalline anisotropy constant, low dielectric loss, high stability and the like in a low frequency band. The ferrite is manufactured by adopting an electronic ceramic process, hot-pressing sintering or sintering in oxygen atmosphere, and is mainly used for manufacturing millimeter wave ferrite devices.
In the prior art, ferrite is needed for the circulator/isolator, and the ferrite is prepared by powder mixing, die casting, sintering, machining and silver brushing. Therefore, the gyromagnetic performance of ferrite is generally evaluated indirectly by measuring parameters such as external dimension, flatness, roughness, density, dielectric and the like in the industry, and the method cannot accurately evaluate the performance of ferrite, so that manufacturers of circulators/isolators also need to further detect ferrite, thereby evaluating the performance of ferrite.
After ferrite is received by a production factory of the existing isolator, 10 pieces are randomly selected in the same batch, 5 isolators are assembled, S parameters of the isolators are tested, and therefore performance of the ferrite is evaluated. The method can directly see whether the ferrite to be detected can meet the requirements. However, since the process of the isolator is complex, there are tens of procedures, and it takes 1-2 hours for conclusion to be reached. And the conclusion is also more easily influenced by other factors, such as inconsistent positions of 5 product magnets in corresponding cavities, deviation among circuits and the like, which can influence the detection result.
Therefore, manufacturers of the circulators/isolators are in urgent need of a device capable of rapidly detecting ferrite performance, so that ferrite detection is rapid, reliable and stable.
Disclosure of Invention
In view of the above problems, the present invention provides a ferrite detection device that can rapidly detect ferrite and ensure stable positions of the remaining components of the entire device, so that the detection is reliable and stable.
A ferrite detection device is characterized in that: the novel ferrite clamping device comprises a base, wherein an inner groove is formed in the center of the base, two signal wire access ends and a load are further arranged on the upper surface of the base, a lower shell is located in the inner groove, N concave positioning holes are annularly distributed on the outer ring surface of the lower shell, N is larger than or equal to 2, a center concave hole is formed in the center of the lower shell, a lower detection assembly is located in the center concave hole, three pins are protruding on the outer ring side of the lower detection assembly, the three pins are respectively connected with two signal wire access ends and a load which are correspondingly connected with the corresponding positions of the two signal wire access ends and the load, each pin is guaranteed to be corresponding to a unique external connection portion, the novel ferrite clamping device further comprises an upper shell, N lower convex claws are protruding below the outer ring surface of the upper shell, the lower convex parts of the lower convex claws are embedded in the positioning holes in a one-to-one correspondence mode under the detection state, an inner cavity is formed in the center lower end of the upper shell, the inner cavity is provided with an upper detection assembly in a positioning mode, and the lower end face of the upper detection assembly and the upper end face of the lower detection assembly is used for detecting ferrite between the upper end face and the lower end face of the upper detection assembly and the ferrite clamping device to be used for clamping.
It is further characterized by:
at least two threaded holes are distributed on the periphery of the upper end face of the lower shell in a ring manner, corresponding through holes are formed in the annular face of the upper shell at positions corresponding to the threaded holes of the lower shell, and positioning screws correspondingly penetrate through the through holes and then are fastened to the corresponding threaded holes, so that the lower end face of the upper detection assembly is tightly attached to the upper end face of ferrite to be detected, and the upper end face of the lower detection assembly is tightly attached to the lower end face of ferrite to be detected;
the corresponding position of the upper part of the through hole is provided with an avoidance hole groove which ensures that the length of the positioning screw can be relatively smaller and the operation is ensured to be performed rapidly;
a spring structure is arranged between the upper wall of the inner cavity of the upper shell and the upper end face of the upper detection assembly, the lower end face of the spring structure and the upper end face of the upper detection assembly are connected to form an integral assembly, and the upper end face of the spring structure is connected with the upper wall of the inner cavity of the upper shell, so that the spring structure can integrally drive the upper detection assembly to vertically press downwards, and the ferrite to be detected corresponding to the clamping between the lower end face of the upper detection assembly and the upper end face of the lower detection assembly is ensured;
the overall thickness of the lower detection component is smaller than that of the central concave hole, and ferrite to be detected is embedded in the top layer of the central concave hole;
the upper end part of the lower shell protrudes upwards from the upper end surface of the base, three guide grooves are annularly distributed on the part of the upper end part of the lower shell protruding outwards from the base, and three pins respectively penetrate through the corresponding guide grooves and then are externally connected with two signal wire access ends and a load at corresponding positions;
the lower detection assembly is sequentially stacked with a circuit part, a first ferrite, a first magnetic conduction sheet and a first magnet from top to bottom, and the circuit part is provided with three pins;
the upper detection assembly is sequentially laminated with a second magnet and a second magnetic conduction sheet from top to bottom;
the second magnet and the first magnet are the same magnet, and the first magnetic conductive sheet and the second magnetic conductive sheet are the same magnetic conductive sheet.
After the technical scheme is adopted, the lower convex parts of the lower convex claws are embedded in the positioning holes in a one-to-one correspondence manner under the detection state, so that the corresponding ferrite to be detected is clamped between the lower end face of the upper detection assembly and the upper end face of the lower detection assembly, two ends of the network analyzer are respectively connected to two signal wire access ends of the upper surface of the base, and whether the S parameters of the newly formed isolator meet the requirements or not is checked on the network analyzer, the ferrite performance can be rapidly and accurately evaluated before production, and the detection efficiency is greatly improved; and ensures the stable position of the rest parts of the whole device, so that the detection is reliable and stable.
Drawings
FIG. 1 is a schematic perspective view of an assembled exploded view of the present invention;
FIG. 2 is a schematic perspective view of the assembled structure of the present invention;
FIG. 3 is a schematic diagram of the present invention tested by a network analyzer;
the names corresponding to the serial numbers in the figures are as follows:
the circuit board comprises a base 1, an inner groove 2, a signal wire access end 3, a PCB circuit board 3-1, a radio frequency coaxial connector 3-2 of an SMA flanged board connector, a load 4, a lower shell 5, a positioning hole 6, a central concave hole 7, a lower detection component 8, a pin 9, an upper shell 10, a lower convex claw 11, an inner cavity 12, an upper detection component 13, a ferrite to be detected 14, a threaded hole 15, a through hole 16, an avoidance hole groove 17, a spring structure 18, a guide groove 19, a circuit part 20, a first ferrite 21, a first magnetic conductive sheet 22, a first magnet 23, a second magnet 24, a second magnetic conductive sheet 25 and a network analyzer 26.
Detailed Description
A ferrite detection device, see fig. 1 and 2: the device comprises a base 1, an inner groove 2 is arranged at the central position of the base 1, two signal wire access ends 3 and a load 4 are further arranged on the upper surface of the base 1, a lower shell 5 is positioned in the inner groove 2, N concave positioning holes 6 are annularly distributed on the outer ring surface of the lower shell 5 corresponding to the surface of the base, N is more than or equal to 2, a central concave hole 7 is arranged at the central position of the lower shell 5, a lower detection assembly 8 is positioned in the central concave hole 7, three pins 9 are convexly arranged on the outer ring side of the lower detection assembly 8, the three pins 9 are respectively externally connected with two signal wire access ends 3 and a load 4 correspondingly connected with the corresponding positions of the two signal wire access ends, each pin 9 is ensured to be correspondingly provided with a unique external connection part, the device further comprises an upper shell 10, the lower part of the outer ring surface of the upper shell 10 is convexly provided with N lower convex claws 11, the lower convex parts of the lower convex claws 11 are correspondingly embedded in the positioning holes 6 in one by one, an inner cavity 12 is arranged at the central lower end of the upper shell 5 in a detection state, an upper detection assembly 13 is positioned in the inner cavity 12, the lower end of the lower detection assembly is correspondingly provided with an upper detection assembly 13, and the lower end surface of the upper detection assembly 13 and the lower detection assembly 8 are correspondingly provided with a ferrite to be clamped between the upper end surface and the ferrite to be correspondingly used for detection 14.
At least two threaded holes 15 are distributed on the periphery of the upper end face of the lower shell 5, corresponding through holes 16 are formed in the annular face of the upper shell 10 at positions corresponding to the threaded holes 15 of the lower shell, set screws (not shown in the figure and belonging to the existing mature structure) correspondingly penetrate through the through holes 16 and then are fastened to the corresponding threaded holes 15, and therefore the lower end face of the upper detection assembly 13 is tightly attached to the upper end face of the ferrite 14 to be detected, and the upper end face of the lower detection assembly 8 is tightly attached to the lower end face of the ferrite 14 to be detected;
the corresponding position of the upper part of the through hole 16 is provided with an avoidance hole groove 17 which ensures that the length of the set screw can be relatively smaller and the operation can be performed quickly;
a spring structure 18 is arranged between the upper wall of the inner cavity of the upper shell 10 and the upper end face of the upper detection component 13, the lower end face of the spring structure 18 and the upper end face of the upper detection component 13 are connected to form an integral component, the upper end face of the spring structure 18 is connected with the upper wall of the inner cavity of the upper shell 10, the spring structure 18 can integrally drive the upper detection component 13 to vertically press downwards, and the corresponding ferrite 14 to be detected is clamped between the lower end face of the upper detection component 13 and the upper end face of the lower detection component 8;
the overall thickness of the lower detection component 8 is smaller than the thickness of the central concave hole 7, and ferrite 14 to be detected is embedded in the top layer of the central concave hole 7;
the upper end part of the lower shell 5 protrudes upwards from the upper end surface of the base 1, three guide grooves 19 are annularly distributed on the part of the upper end part of the lower shell 5 protruding outwards from the base 1, and three pins 9 respectively penetrate through the corresponding guide grooves 19 and then are externally connected with two signal wire access ends 3 and a load 4 at corresponding positions;
the lower detection assembly 8 is sequentially laminated from top to bottom with a circuit part 20, a first ferrite 21, a first magnetic conductive sheet 22 and a first magnet 23, wherein the circuit part 20 is provided with three pins 3;
the upper detection assembly 13 is sequentially laminated with a second magnet 24 and a second magnetic conductive sheet 25 from top to bottom;
the second magnet 24 and the first magnet 23 are the same magnet, and the first magnetic conductive sheet 25 and the second magnetic conductive sheet 22 are the same magnetic conductive sheet.
In the specific embodiment: the upper shell 5 and the lower shell 10 are made of steel materials, the base 1 is a copper base, the load 4 is a radio-frequency resistor of 250W and 50 ohms, and the signal wire access end 3 comprises a PCB (printed circuit board) 3-1 and a radio-frequency coaxial connector 3-2 with an SMA (shape memory alloy) flanged joint.
The outer ring surface of the lower shell is provided with 3 concave positioning holes corresponding to the surface ring of the base, the lower part of the outer ring surface of the upper shell is provided with 3 lower convex claws in a protruding mode, and the lower convex parts of the lower convex claws are embedded in the positioning holes in a one-to-one correspondence mode in a detection state; two threaded holes are distributed on the periphery of the upper end face of the lower shell.
The working principle is as follows, see fig. 3: the lower convex parts of the lower convex claws 11 are embedded in the positioning holes 6 in a one-to-one correspondence manner, the upper shell 10 and the lower shell 2 are connected in a locking manner through positioning screws, meanwhile, the upper detection assembly 13 is pressed down under the action of the spring structure 18, the corresponding ferrite 14 to be detected is clamped between the lower end face of the upper detection assembly 13 and the upper end face of the lower detection assembly 8, two ports of the network analyzer 26 are respectively connected to the two signal wire access ends 3 on the upper surface of the base 1, whether S parameters of a newly formed isolator meet requirements or not is checked on the network analyzer, and the performance of the ferrite can be rapidly and accurately evaluated before production, so that the detection efficiency is greatly improved.
The foregoing describes the embodiments of the present invention in detail, but the description is only a preferred embodiment of the invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications made in accordance with the scope of the present invention shall fall within the scope of the present patent.
Claims (1)
1. A ferrite detection device, characterized in that: the ferrite clamping device comprises a base, wherein an inner groove is formed in the center of the base, two signal wire access ends and a load are further arranged on the upper surface of the base, a lower shell is positioned in the inner groove, N concave positioning holes are annularly distributed on the outer ring surface of the lower shell corresponding to the surface of the base, N is more than or equal to 2, a center concave hole is formed in the center of the lower shell, a lower detection assembly is positioned in the center concave hole, three pins are protruded on the outer ring side of the lower detection assembly, the three pins are respectively externally connected with two signal wire access ends and a load correspondingly connected with the corresponding positions of the two signal wire access ends and the load, each pin is guaranteed to have a unique external connection part, the ferrite clamping device further comprises an upper shell, N lower convex claws are protruded below the outer ring surface of the upper shell, the lower convex parts of the lower convex claws are embedded in the positioning holes in a one-to-one correspondence manner in the lower convex parts of the lower convex claws in the detection state, an inner cavity is formed in the center lower end of the upper shell, an upper detection assembly is positioned and is arranged in the inner cavity, and the upper detection assembly is correspondingly clamped between the lower end surface of the upper detection assembly and the upper end surface of the upper detection assembly to be used for clamping ferrite;
at least two threaded holes are distributed on the periphery of the upper end face of the lower shell in a ring manner, corresponding through holes are formed in the annular face of the upper shell at positions corresponding to the threaded holes of the lower shell, and positioning screws correspondingly penetrate through the through holes and then are fastened to the corresponding threaded holes, so that the lower end face of the upper detection assembly is tightly attached to the upper end face of ferrite to be detected, and the upper end face of the lower detection assembly is tightly attached to the lower end of ferrite to be detected;
a corresponding position at the upper part of the through hole is provided with an avoidance hole groove;
a spring structure is arranged between the upper wall of the inner cavity of the upper shell and the upper end face of the upper detection assembly, the lower end face of the spring structure and the upper end face of the upper detection assembly are connected to form an integral assembly, and the upper end face of the spring structure is connected with the upper wall of the inner cavity of the upper shell;
the overall thickness of the lower detection component is smaller than that of the central concave hole, and ferrite to be detected is embedded in the top layer of the central concave hole;
the upper end part of the lower shell protrudes upwards from the upper end surface of the base, three guide grooves are annularly distributed on the part of the upper end part of the lower shell protruding outwards from the base, and three pins respectively penetrate through the corresponding guide grooves and then are externally connected with two signal wire access ends and a load at corresponding positions;
the lower detection assembly is sequentially stacked with a circuit part, a first ferrite, a first magnetic conduction sheet and a first magnet from top to bottom, and the circuit part is provided with three pins;
the upper detection assembly is sequentially laminated with a second magnet and a second magnetic conduction sheet from top to bottom;
the second magnet and the first magnet are the same magnet, and the first magnetic conductive sheet and the second magnetic conductive sheet are the same magnetic conductive sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710220032.6A CN106872916B (en) | 2017-04-06 | 2017-04-06 | Ferrite detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710220032.6A CN106872916B (en) | 2017-04-06 | 2017-04-06 | Ferrite detection device |
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| Publication Number | Publication Date |
|---|---|
| CN106872916A CN106872916A (en) | 2017-06-20 |
| CN106872916B true CN106872916B (en) | 2023-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710220032.6A Active CN106872916B (en) | 2017-04-06 | 2017-04-06 | Ferrite detection device |
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| CN112731039B (en) * | 2020-12-31 | 2023-05-23 | 昆山联滔电子有限公司 | Ferrite testing device and testing method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002189047A (en) * | 2000-12-21 | 2002-07-05 | Murata Mfg Co Ltd | Instrument and method for measuring irreversible circuit element |
| CN102411072A (en) * | 2011-08-04 | 2012-04-11 | 苏州易特诺科技股份有限公司 | Test fixture of millimeter-wave circuit device |
| CN102544664A (en) * | 2012-01-14 | 2012-07-04 | 彭龙 | Miniaturized S waveband micro-strip ferrite circulator |
| CN102565462A (en) * | 2011-12-26 | 2012-07-11 | 北京中微普业科技有限公司 | Self-calibration high-precision microwave measuring clamp and calibration method |
| CN203658565U (en) * | 2013-12-11 | 2014-06-18 | 广州赛宝计量检测中心服务有限公司 | Test fixture for measurement of ferromagnetic resonance parameters |
| CN203983434U (en) * | 2014-08-22 | 2014-12-03 | 苏州迈授电子通讯科技有限公司 | Upper and lower lamination Split assembled embedded isolator |
| CN204741059U (en) * | 2015-06-24 | 2015-11-04 | 南京拓邦微电子有限公司 | Be applied to isolation coupler in microwave debug system |
| CN206671520U (en) * | 2017-04-06 | 2017-11-24 | 苏州工业园区凯艺精密科技有限公司 | A kind of ferrite detection means |
-
2017
- 2017-04-06 CN CN201710220032.6A patent/CN106872916B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002189047A (en) * | 2000-12-21 | 2002-07-05 | Murata Mfg Co Ltd | Instrument and method for measuring irreversible circuit element |
| CN102411072A (en) * | 2011-08-04 | 2012-04-11 | 苏州易特诺科技股份有限公司 | Test fixture of millimeter-wave circuit device |
| CN102565462A (en) * | 2011-12-26 | 2012-07-11 | 北京中微普业科技有限公司 | Self-calibration high-precision microwave measuring clamp and calibration method |
| CN102544664A (en) * | 2012-01-14 | 2012-07-04 | 彭龙 | Miniaturized S waveband micro-strip ferrite circulator |
| CN203658565U (en) * | 2013-12-11 | 2014-06-18 | 广州赛宝计量检测中心服务有限公司 | Test fixture for measurement of ferromagnetic resonance parameters |
| CN203983434U (en) * | 2014-08-22 | 2014-12-03 | 苏州迈授电子通讯科技有限公司 | Upper and lower lamination Split assembled embedded isolator |
| CN204741059U (en) * | 2015-06-24 | 2015-11-04 | 南京拓邦微电子有限公司 | Be applied to isolation coupler in microwave debug system |
| CN206671520U (en) * | 2017-04-06 | 2017-11-24 | 苏州工业园区凯艺精密科技有限公司 | A kind of ferrite detection means |
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