CN201156082Y - Circular magnetic field probe head - Google Patents
Circular magnetic field probe head Download PDFInfo
- Publication number
- CN201156082Y CN201156082Y CNU2008200058055U CN200820005805U CN201156082Y CN 201156082 Y CN201156082 Y CN 201156082Y CN U2008200058055 U CNU2008200058055 U CN U2008200058055U CN 200820005805 U CN200820005805 U CN 200820005805U CN 201156082 Y CN201156082 Y CN 201156082Y
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- probe
- magnetic field
- coil
- metal shielding
- transmission line
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Abstract
The utility model relates to a circular magnetic field probe, which can measure the field intensity radiatedly emitted by a low-frequency (50 hertz to 30 Megahertz) near-field local noise source, electromagnetic leakage and an electromagnetic interference source through electromagnetic transformation, and can also absolutely measure the field intensity of a certain site. The circular magnetic field probe comprises a metal shielding case, a probe coil, a copper-pipe handle and a bayonet nut connector cable socket. The probe coil, the diameter of which is within 38 to 42 mm, is formed by coiling a semi-rigid coaxial cable multiturn outside the framework of the probe coil. Then a part of the semi-rigid coaxial cable is extended as a transmission line, outside which a copper pipe used as a handle is sleeved. The copper-pipe handle, the transmission line are welded with the bayonet nut connector cable socket together. The probe coil is a multiturn circular coil, outside which a nonmagnetic circular metal shielding case is arranged. The top of the shielding case is provided with an open gap. The circular magnetic field probe has the advantages of low working frequency, high measuring accuracy, good repeatability of measurement and convenient match with frequency spectrometer. So the circular magnetic field probe is dominant in low frequency range, measuring accuracy and probe ring area.
Description
Technical field
The present invention relates to a kind of toroidal magnetic field probe, belong to a kind of sensor.Be specially adapted to measure the field intensity of local noise source, low frequency (Hz) near field, electromagnetic leakage and electromagnetic interference source Radiation Emission, also can be used for the absolute measurement of somewhere field intensity value.
Background technology
The size of induced signal is relevant with the area of ring on the magnet field probe, and the long-pending big more induced signal of anchor ring is just big more, and still, area large space resolution more is just poor more.For diagnostic measures, if seek partial radiation source, should select the less magnet field probe of diameter for use, so that dwindle the scope of searching and improve spatial resolving power.But the too small gain that can influence probe again of probe area.
The utility model content
The purpose of this utility model provides a kind of toroidal magnetic field probe, and described toroidal magnetic field probe has less seek scope and higher spatial resolving power, can be used for seeking partial radiation source, and described probe also has higher gain simultaneously.
For realizing the utility model purpose, the utility model provides a kind of toroidal magnetic field probe, comprise the endless metal shielding case, probe coil, copper pipe handle and bayonet nut connector (Bayonet Nut Connector, BNC) cable socket, described probe coil diameter is 38-42mm, be half just the concentric cable multi-turn be wound on coil rack and form outward, again half firm concentric cable is extended one section as transmission line, outside transmission line, put copper pipe as handle, with the copper pipe handle, transmission line together welds with bayonet nut connector cable socket, described probe coil is the multiturn toroid winding, coil is provided with non-magnetic ring shape metal shielding outward, and inc slit is left at the metal shielding top.
The optimal technical scheme that the utility model provides is that the described probe coil number of turn is the 380-420 circle.
The another optimal technical scheme that the utility model provides is that described coil is that diameter is the enameled wire of 0.3mm.
Another optimal technical scheme that the utility model provides is that described not closed gap width is 1.5-2.5mm.
The optimal technical scheme again that the utility model provides is that described non magnetic annular metal shielding is nonmagnetic copper coin screening can.
Adopt such design, described probe is selected less magnet field probe for use, can dwindle the scope of searching and improve spatial resolving power, can detect centimetre-sized with interior Distribution of Magnetic Field situation, and selected more coil turn for use, gain to improve probe, so resolution and highly sensitive.Adopt nonmagnetic copper coin screening can, reduced the static noise interference greatly, therefore improved the signal to noise ratio (S/N ratio) of receiver; Probe has the electric shield characteristic simultaneously, can only receive magnetic-field component, thereby improve measuring repeatability.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is the structural representation of a kind of toroidal magnetic field of the utility model probe.
Fig. 2 a is the structural representation of the probe coil of a kind of toroidal magnetic field of the utility model probe.
Fig. 2 b is the structural representation of the coil rack of a kind of toroidal magnetic field of the utility model probe.
Fig. 3 is the typical antenna coefficient of a kind of toroidal magnetic field of the utility model probe.
Embodiment
With reference to figure 1, the utility model provides a kind of toroidal magnetic field probe 100, comprise endless metal shielding case 101, probe coil 102, copper pipe handle 103 and bayonet nut connector (Bayonet Nut Connector, BNC) cable socket 104, described probe coil 102 diameters are 38-42mm, be half just the concentric cable multi-turn be wound on coil rack and form outward, again half firm concentric cable is extended one section as transmission line, outside transmission line, put copper pipe as handle 103, with copper pipe handle 103 and transmission line outer conductor together with the shell welding of bayonet nut connector cable socket 104, the inner wire of transmission line and the heart yearn of bayonet nut connector cable socket 104 are welded, described probe coil is the multiturn toroid winding, coil is provided with non-magnetic ring shape metal shielding 101 outward, and inc slit a is left (as Fig. 2 a) in metal shielding 101 tops.
In a preferred embodiment of the present utility model, described probe coil 102 is the half firm concentric cable of 0.3mm by diameter, is last coiling 400 circles of I-shaped plastic skeleton 201 (seeing Fig. 2 b) of 37mm, thick 4.8mm at external diameter with it.Coil adopts multilayer close around, mutually insulated between enameled wire.Overlapped built in coiling endless metal shielding case 101 outside the coil rack of lattice coil again.The endless metal shielding case is that the copper coin with thick 0.4mm is stamped to form, in order not influence the magnetic field coupling, leave the wide not closed slit of 2mm at endless metal shielding case top, below endless metal shielding case 101 punching press have a segment length 10cm sleeve, so that be the half coaxial cable handle welding just of 3.6mm with itself and the diameter that inserts.Injection moulding outside metal shielding 101 and copper pipe handle 103 at last.
In another embodiment of the present utility model, select element and coil winding method, each element connection, the same technical scheme as shown in Figure 1 of composing method for use, only different is that non-magnetic annular metal shielding is nonmagnetic copper coin screening can.
A kind of toroidal magnetic field of the utility model probe provides the antenna factor (see figure 5) of carrying out the electromagnetic field intensity quantitative measurment from 50Hz to 30MHz.Low frequency signals such as energy measurement power frequency supply 50Hz first-harmonic and harmonic wave can also be measured common mode current, low frequency electromagnetic leakage, B or the dB/dt etc. of cable.The electromagnetic radiation that is applicable to motor and servo drive system thereof, Lighting Control Assembly and audio frequency, video, audio-visual equipment etc. is measured.Adopt nonmagnetic copper coin screening can, reduced the static noise interference greatly, therefore improved the signal to noise ratio (S/N ratio) of receiver; Probe has the electric shield characteristic simultaneously, can only receive magnetic-field component, thereby improve measuring repeatability.Probe area is less, can detect centimetre-sized with interior Distribution of Magnetic Field situation, thereby resolution and highly sensitive.
Claims (4)
1, a kind of toroidal magnetic field probe, comprise the endless metal shielding case, probe coil, copper pipe handle and bayonet nut connector (Bayonet Nut Connector, BNC) cable socket, described probe coil diameter is 38-42mm, be half just the concentric cable multi-turn be wound on coil rack and form outward, again half firm concentric cable is extended one section as transmission line, outside transmission line, put copper pipe as handle, with the copper pipe handle, transmission line and the welding of bayonet nut connector cable socket, it is characterized in that: described probe coil is the multiturn toroid winding, coil is provided with non-magnetic ring shape metal shielding outward, and inc slit is left at the metal shielding top.
2, pop one's head in toroidal magnetic field as claimed in claim 1, it is characterized in that the described probe coil number of turn is the 380-420 circle.
3, pop one's head in toroidal magnetic field as claimed in claim 1, it is characterized in that described not closed gap width is 1.5-2.5mm.
4, pop one's head in toroidal magnetic field as claimed in claim 1, it is characterized in that described non magnetic annular metal shielding is nonmagnetic copper coin screening can.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200058055U CN201156082Y (en) | 2008-02-22 | 2008-02-22 | Circular magnetic field probe head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200058055U CN201156082Y (en) | 2008-02-22 | 2008-02-22 | Circular magnetic field probe head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201156082Y true CN201156082Y (en) | 2008-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200058055U Expired - Fee Related CN201156082Y (en) | 2008-02-22 | 2008-02-22 | Circular magnetic field probe head |
Country Status (1)
| Country | Link |
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| CN (1) | CN201156082Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102955076A (en) * | 2012-10-25 | 2013-03-06 | 西安开容电子技术有限责任公司 | Design method of spherical near field test probe |
| CN102981028A (en) * | 2012-11-02 | 2013-03-20 | 财团法人台湾电子检验中心 | Near-field electromagnetic probe |
| CN104020364A (en) * | 2014-04-04 | 2014-09-03 | 湖北文理学院 | Magnetic-field detector of common-mode current noise |
| CN106443522A (en) * | 2016-08-30 | 2017-02-22 | 合肥联宝信息技术有限公司 | Magnetic field detection member and detection device |
| 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 |
| CN108139195A (en) * | 2015-08-10 | 2018-06-08 | 达涅利自动化有限公司 | For the equipment of the size of thermal measurement mental section during rolling |
| CN109298356A (en) * | 2018-09-20 | 2019-02-01 | 中国原子能科学研究院 | High-precision magnetic-field measurement induction coil probe in a kind of superconducting cyclotron |
| CN110531285A (en) * | 2019-09-26 | 2019-12-03 | 清华大学 | A kind of Multiple level transient magnetic field sensor |
| CN114111556A (en) * | 2021-11-30 | 2022-03-01 | 安徽见行科技有限公司 | Ultrathin probe for extreme gap detection environment and eddy current sensor |
-
2008
- 2008-02-22 CN CNU2008200058055U patent/CN201156082Y/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102955076A (en) * | 2012-10-25 | 2013-03-06 | 西安开容电子技术有限责任公司 | Design method of spherical near field test probe |
| CN102981028A (en) * | 2012-11-02 | 2013-03-20 | 财团法人台湾电子检验中心 | Near-field electromagnetic probe |
| CN104020364A (en) * | 2014-04-04 | 2014-09-03 | 湖北文理学院 | Magnetic-field detector of common-mode current noise |
| CN104020364B (en) * | 2014-04-04 | 2016-08-17 | 湖北文理学院 | Common mode current noise field detecting device |
| CN108139195A (en) * | 2015-08-10 | 2018-06-08 | 达涅利自动化有限公司 | For the equipment of the size of thermal measurement mental section during rolling |
| CN106443522A (en) * | 2016-08-30 | 2017-02-22 | 合肥联宝信息技术有限公司 | Magnetic field detection member and detection device |
| CN106443522B (en) * | 2016-08-30 | 2019-05-24 | 合肥联宝信息技术有限公司 | A kind of magnet field probe component and detection device |
| 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 |
| CN109298356A (en) * | 2018-09-20 | 2019-02-01 | 中国原子能科学研究院 | High-precision magnetic-field measurement induction coil probe in a kind of superconducting cyclotron |
| CN109298356B (en) * | 2018-09-20 | 2024-05-14 | 中国原子能科学研究院 | High-precision magnetic field measurement induction coil probe in superconducting cyclotron |
| CN110531285A (en) * | 2019-09-26 | 2019-12-03 | 清华大学 | A kind of Multiple level transient magnetic field sensor |
| CN114111556A (en) * | 2021-11-30 | 2022-03-01 | 安徽见行科技有限公司 | Ultrathin probe for extreme gap detection environment and eddy current sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081126 |