CN203572948U - High frequency magnetic field probe - Google Patents
High frequency magnetic field probe Download PDFInfo
- Publication number
- CN203572948U CN203572948U CN201320735002.6U CN201320735002U CN203572948U CN 203572948 U CN203572948 U CN 203572948U CN 201320735002 U CN201320735002 U CN 201320735002U CN 203572948 U CN203572948 U CN 203572948U
- Authority
- CN
- China
- Prior art keywords
- magnetic field
- high frequency
- frequency magnetic
- coaxial cable
- half steel
- 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.)
- Expired - Lifetime
Links
- 239000000523 sample Substances 0.000 title claims abstract description 36
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 34
- 239000010959 steel Substances 0.000 claims abstract description 34
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052802 copper Inorganic materials 0.000 claims abstract description 24
- 239000010949 copper Substances 0.000 claims abstract description 24
- 230000001052 transient effect Effects 0.000 abstract description 9
- 208000025274 Lightning injury Diseases 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 4
- 230000007257 malfunction Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The utility model discloses a high frequency magnetic field probe. The high frequency magnetic field probe comprises an annular probe coil arranged in a copper tube, wherein the probe coil is formed by winding a semi-steel coaxial cable, a tail end of the semi-steel coaxial cable which extends out of the copper tube is provided with a shielding layer, one end of an inner core of the semi-steel coaxial cable in the shielding layer is connected with an SMA connector, the other end of the inner core of the semi-steel coaxial cable in the shielding layer is connected with the shielding layer, and a resistor is connected between the two ends of the inner core of the semi-steel coaxial cable in the shielding layer. According to the high frequency magnetic field probe, by calibrating the linearity curve of the high frequency magnetic field probe and testing a standard pulse magnetic field, a strong transient electromagnetic pulse generated when a transformer station is subjected to a fault or a lightning stroke or is under switch operation can be measured, misoperation of secondary equipment can be effectively avoided, and normal operation of the secondary equipment is guaranteed.
Description
Technical field
The utility model relates to a kind of sensing device, relates in particular to a kind of high frequency magnetic field probe.
Background technology
Because GIS in transformer station around exists various stable states and electric field transient state, magnetic field, these electromagnetic interference sources will cause interference to being arranged near the secondary devices such as automatic control, communication and protection system in convergence control cabinet GIS.Especially when transformer station suffers fault, thunderbolt and switching manipulation, can produce very strong transient electromagnetic pulse, the amplitude variation range that this transient electromagnetic field is distributed in space each point is very large, and there is very wide spectral range, if it is bad that electromagnetic shielding measure is done, will cause the malfunction of secondary device and cause occurring unnecessary trouble and loss.The seriousness of disturbing in order to assess this Transient Electromagnetic, needs a kind of device that can transient field be measured and be studied badly.
Utility model content
The purpose of this utility model is to provide a kind of high frequency magnetic field probe, and the strong transient electromagnetic pulse producing in the time of can suffering fault, thunderbolt and switching manipulation to transformer station is measured, and avoids causing the malfunction of secondary device, guarantees the normal work of secondary device.
The utility model adopts following technical proposals:
A kind of high frequency magnetic field probe, comprise the annular probe coil being arranged in copper pipe, probe coil is formed by half steel coiled coaxial cable, the half steel concentric cable tail end extending outside copper pipe is provided with screen layer, one end of half steel coaxial cable inner core in screen layer connects sub-miniature A connector, the other end of the half steel coaxial cable inner core in screen layer connects screen layer, between the two ends of the half steel coaxial cable inner core in screen layer, is connected with resistance.
Extend on the copper pipe of the relative side of half steel concentric cable outside copper pipe and be provided with breach.
Described gap width is 1mm-2mm.
Described probe coil is made by half steel coiled coaxial cable single turn, and the diameter of annular probe coil is 5cm, and half steel coaxial cable inner core diameter is 0.9mm.
Described copper pipe diameter is 4mm.
Described screen layer is copper shield.
Described resistance is 0.02 Europe.
The utility model is at annular probe coil outer setting copper pipe, and the half steel concentric cable tail end outside extending copper pipe arranges screen layer, contact resistance between the two ends of the half steel coaxial cable inner core in screen layer, when the magnetic flux by annular probe coil changes, in screen layer, the two ends of resistance can produce induced voltage, and induced voltage can be exported by half steel concentric cable and sub-miniature A connector.Staff is by calibrating linearity curve the testing standard pulsed magnetic field of high frequency magnetic field probe, the strong transient electromagnetic pulse producing in the time of can suffering fault, thunderbolt and switching manipulation to transformer station is measured, can effectively avoid causing the malfunction of secondary device, guarantee the normal work of secondary device.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
As shown in Figure 1, the utility model comprises the annular probe coil being arranged in copper pipe 1, probe coil is formed by 2 coilings of half steel concentric cable, half steel concentric cable 2 tail ends that extend outside copper pipe 1 are provided with screen layer 3, one end of half steel coaxial cable inner core 4 in screen layer 3 connects sub-miniature A connector 5, the other end of the half steel coaxial cable inner core 4 in screen layer 3 connects screen layer 3, between the two ends of the half steel coaxial cable inner core 4 in screen layer 3, be connected with resistance 6, resistance 6 forms closed-loop path with the half steel coaxial cable inner core 4 in annular probe coil.In order to prevent from producing circulation in screen layer that copper pipe 1 forms, affect the accuracy of measurement, the utility model is also provided with breach 7 on the copper pipe 1 of the relative side of half steel concentric cable 2 outside extending copper pipe 1.In the present embodiment, probe coil by 2 coilings of half steel concentric cable after single turn make, the diameter of annular probe coil is 5cm, copper pipe 1 diameter is 4mm, half steel coaxial cable inner core 4 diameters are 0.9mm, breach 7 width that arrange on copper pipe 1 are 1mm-2mm, and screen layer 3 adopts copper shield, and resistance 6 resistances of screen layer 3 interior settings are 0.02 Europe.
In use, when the magnetic flux by annular probe coil changes, the two ends of the interior resistance 6 of screen layer 3 can produce induced voltage to the utility model, and induced voltage can be by half steel concentric cable 2 and sub-miniature A connector 5 outputs.Staff is by calibrating linearity curve the testing standard pulsed magnetic field of high frequency magnetic field probe described in the utility model, and the strong transient electromagnetic pulse producing in the time of can suffering fault, thunderbolt and switching manipulation to transformer station is measured.Because high frequency magnetic field probe described in the utility model is for shielding symmetrical structure, can greatly strengthen antijamming capability.
Claims (7)
1. a high frequency magnetic field is popped one's head in, it is characterized in that: comprise the annular probe coil being arranged in copper pipe, probe coil is formed by half steel coiled coaxial cable, the half steel concentric cable tail end extending outside copper pipe is provided with screen layer, one end of half steel coaxial cable inner core in screen layer connects sub-miniature A connector, the other end of the half steel coaxial cable inner core in screen layer connects screen layer, between the two ends of the half steel coaxial cable inner core in screen layer, is connected with resistance.
2. high frequency magnetic field according to claim 1 probe, is characterized in that: extend on the copper pipe of the relative side of half steel concentric cable outside copper pipe and be provided with breach.
3. high frequency magnetic field probe according to claim 2, is characterized in that: described gap width is 1mm-2mm.
4. according to the high frequency magnetic field probe described in claim 1,2 or 3, it is characterized in that: described probe coil is made by half steel coiled coaxial cable single turn, the diameter of annular probe coil is 5cm, and half steel coaxial cable inner core diameter is 0.9mm.
5. high frequency magnetic field probe according to claim 4, is characterized in that: described copper pipe diameter is 4mm.
6. high frequency magnetic field probe according to claim 5, is characterized in that: described screen layer is copper shield.
7. high frequency magnetic field probe according to claim 6, is characterized in that: described resistance is 0.02 Europe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320735002.6U CN203572948U (en) | 2013-11-20 | 2013-11-20 | High frequency magnetic field probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320735002.6U CN203572948U (en) | 2013-11-20 | 2013-11-20 | High frequency magnetic field probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203572948U true CN203572948U (en) | 2014-04-30 |
Family
ID=50540675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320735002.6U Expired - Lifetime CN203572948U (en) | 2013-11-20 | 2013-11-20 | High frequency magnetic field probe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203572948U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332018A (en) * | 2014-08-13 | 2015-02-04 | 国家电网公司 | Magnetic-information feedback method used for cable terminal |
| CN105242222A (en) * | 2015-09-11 | 2016-01-13 | 合肥联宝信息技术有限公司 | Method for measuring magnetic field radiation and magnetic field probe |
| CN108051654A (en) * | 2017-12-04 | 2018-05-18 | 北京航空航天大学 | A kind of magnet field probe using bevel edge grading structure |
| CN112444662A (en) * | 2020-10-27 | 2021-03-05 | 佛山市联动科技股份有限公司 | Current sensor and current sensing system |
-
2013
- 2013-11-20 CN CN201320735002.6U patent/CN203572948U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332018A (en) * | 2014-08-13 | 2015-02-04 | 国家电网公司 | Magnetic-information feedback method used for cable terminal |
| CN105242222A (en) * | 2015-09-11 | 2016-01-13 | 合肥联宝信息技术有限公司 | Method for measuring magnetic field radiation and magnetic field probe |
| CN108051654A (en) * | 2017-12-04 | 2018-05-18 | 北京航空航天大学 | A kind of magnet field probe using bevel edge grading structure |
| CN108051654B (en) * | 2017-12-04 | 2019-11-29 | 北京航空航天大学 | A kind of magnet field probe using bevel edge grading structure |
| CN112444662A (en) * | 2020-10-27 | 2021-03-05 | 佛山市联动科技股份有限公司 | Current sensor and current sensing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140430 |