CN104155501A - Open type semi-annular anti-interference current sensor - Google Patents
Open type semi-annular anti-interference current sensor Download PDFInfo
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- CN104155501A CN104155501A CN201410428205.XA CN201410428205A CN104155501A CN 104155501 A CN104155501 A CN 104155501A CN 201410428205 A CN201410428205 A CN 201410428205A CN 104155501 A CN104155501 A CN 104155501A
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Abstract
The invention discloses an open type semi-annular anti-interference current sensor and belongs to the technical field of electric engineering. The open type semi-annular anti-interference current sensor comprises two annular PCBs, wherein each annular PCB is formed by splicing two semi-annular PCB bodies provided with wire coils. The open type semi-annular anti-interference current sensor is characterized in that the inner-layer ring, the middle-layer ring and the outer-layer ring of each annular PCB are provided with corresponding inner via holes, middle via holes and outer via holes respectively; wire arrangement is carried out on the obverse side and the reverse side of each annular PCB in the mode that a wire penetrates through one outer via hole, one corresponding inner via hole and the outer via hole to form a large wire turn, and wire arrangement is carried out on the obverse side and the reverse side of each annular PCB in the mode that the wire penetrates through one outer via hole, the adjacent middle via hole and next one outer via hole to form a small wire turn; after wire arrangement of the small wire turn is completed, the wire strides to the next corresponding outer via hole to repeat wire arrangement of another large wire turn. According to the open type semi-annular anti-interference current sensor, the open type design, symmetric wire arrangement and two-board tandem connection are adopted, and the design of simultaneous wire arrangement of the large wire turns and the small wire turns is adopted, so the open type semi-annular anti-interference current sensor has the advantages of being simple in structure, small in size, low in manufacturing cost and capable of ensuring uniform and symmetric wire arrangement, thereby guaranteeing that magnetic flux can pass through the coils completely.
Description
Technical field
The present invention relates to electrical engineering technical field, particularly a kind of open type semi-circular anti-interference current sensor.
Background technology
In electric system, current transformer is that therefore, electromagnetic current transducer is widely used in electric system as electric energy metrical and the important power equipment that obtains relay protection signal.In the last few years, along with developing rapidly of national economic development, the capacity of electric system constantly increased, the working voltage grade of electrical network improves constantly, and traditional electromagnetic current transducer exists following problem:
1) the Sensor section insulation system of mutual inductor becomes increasingly complex;
2) range of dynamic measurement is little, frequency band is narrow;
3) most of current transformer relies on insulating oil as major insulation;
4) electromagnetic type current sensor has iron core, has magnetically saturated problem;
5) sensor bulk is large, cost is high and difficult installation.
Luo-coil is a kind of coil of hollow annular, can between be enclosed within and on measured conductor, measure electric current, metering system is simple to operation, but traditional Luo-coil is lower in the precision of measuring electric current, and volume is larger, while particularly measuring electric current in high voltage, large electric current transmission line of electricity, operate very inconvenient.
For above-mentioned problems of the prior art, need to design one and be applied in high voltage, large electric current transmission line of electricity electric system.
Summary of the invention
In view of this, the object of the invention is to overcome above-mentioned deficiency, a kind of open type semi-circular anti-interference current sensor is provided, this sensor is measured the principle development of electric current based on Luo-coil, the design of employing open type, has simplified the structure of sensor and has improved the dirigibility of installing.
The object of the invention is to be achieved through the following technical solutions:
A kind of open type semi-circular anti-interference current sensor, comprise two blocks of ring-shaped P CB plates, described ring-shaped P CB plate is spliced by two semi-circular pcb boards that are furnished with lead loop, via hole, middle via hole and outer via hole in being provided with accordingly on inner layer ring, middle layer ring and the outer layer ring of ring-shaped P CB plate, between the interior via hole-outer via hole of outer via hole-correspondence, pros and cons wiring forms large wire turn, the pros and cons little wire turn of formation that connects up between middle via hole-next outer via hole of outer via hole-adjacent; After little wire turn wiring, wire is cross over next outer via hole again and repeats large wire turn wiring; Large wire turn and little wire turn are alternately arranged on two semi-circular pcb boards, and the wiring route of two semi-circular pcb boards is identical; Wiring route between two semi-circular pcb boards by coupling together in the mode of contact pin coiling between two outer via holes of stitching portion.
Further, every α even angle, outer via hole is set around ring-shaped P CBBan center, every 2 α even angle, interior via hole is set, described middle via hole is disposed between two interior via holes; And outer via hole is alternately corresponding with interior via hole and middle via hole, and corresponding two via holes and ring-shaped P CB plate is centered close on same straight line mutually.
Further, described α is 5 °, and the outer via hole on monolithic semi-circular pcb board has 36, and interior via hole has 18, and middle via hole has 17.
Further, on described ring-shaped P CB plate, be provided with at least three connection keyways, and described connection keyway is on same annulus.
Further, it is along the line that described two halves ring-shaped P CB plate forms concavo-convex two staggered openings in stitching portion.
Further, described two halves ring-shaped P CB plate relies on insulating press boards to fix, and described insulating press boards covers on opening is along the line, makes one end of insulating press boards be positioned at first ring-shaped P CB plate, and the other end is positioned at second ring-shaped P CB plate; Described insulating press boards is fixed its two ends by fixing lock again.
Further, on described first ring-shaped P CB plate or second ring-shaped P CB plate, be also provided with two wiring holes.
The invention has the advantages that: the design that the present invention adopts open type design, symmetry wiring, two plate tandems to connect and adopt large wire turn and little wire turn to connect up simultaneously, have simple in structure, volume is little, cost of manufacture is low; Installing and using of sensor is convenient in the design of open type; The series connection of identical two pcb boards is used, and can effectively suppress the interference of stray magnetic field; Adopt PCB manufacture craft, and adopt the design of little wire turn, can ensure that sensor wiring is even, symmetrical, thereby ensure that magnetic flux is all through advantages such as coils.
Other advantage of the present invention, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on will be apparent to those skilled in the art to investigating below, or can be instructed from the practice of the present invention.The objects and other advantages of the present invention can be passed through instructions below, claims, and in accompanying drawing, specifically noted structure realizes and obtains.
Brief description of the drawings
In order to make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the present invention is described in further detail, wherein:
Fig. 1 is one-piece construction and the wiring schematic diagram of ring-shaped P CB plate of the present invention;
Fig. 2 is that two halves ring-shaped P CB plate of the present invention divides other structure and wiring schematic diagram;
Fig. 3 is the detection system embodiment figure that the present invention measures electric current;
Fig. 4 is the hardware circuit schematic diagram of the detection system of Fig. 3;
Wherein: 1-connects keyway; 2-front wire; 3-insulating press boards; The fixing lock of 4-; 5-opening is along the line; The outer via hole of 6-; 7-reverse side wire; Via hole in the middle of 8-; 9-wiring hole; Via hole in 10-.
Embodiment
Be below the detailed description of the preferred embodiment of the present invention, should be appreciated that preferred embodiment is only for the present invention is described, instead of in order to limit the scope of the invention.
Current sensor of the present invention is based on Luo-coil principle, by wire by being evenly arranged on ring-shaped P CB plate, measured conductor is through the axle center of two coaxially arranged ring-shaped P CB plates, in the time aliving in conductor, can around conductor, produce magnetic flux, when the lead loop of magnetic flux by arranging on ring-shaped P CB plate, can induce electromotive force, by this signals collecting and process, reach the object of current detecting.And technical scheme of the present invention is mainly the design of ring-shaped P CB plate.
Be illustrated in figure 1 one-piece construction and the wiring schematic diagram of ring-shaped P CB plate of the present invention, described ring-shaped P CB plate is spliced by two semi-circular pcb boards that are furnished with lead loop, via hole 10, middle via hole 8 and outer via hole 6 in being provided with accordingly on inner layer ring, middle layer ring and the outer layer ring of ring-shaped P CB plate, between the interior via hole-outer via hole of outer via hole-correspondence, pros and cons wiring forms large wire turn, the pros and cons little wire turn of formation that connects up between middle via hole-next outer via hole of outer via hole-adjacent; After little wire turn wiring, wire is cross over next outer via hole again and repeats large wire turn wiring; Large wire turn and little wire turn are alternately arranged on two semi-circular pcb boards, and the wiring route of two semi-circular pcb boards is identical; Wiring route between two semi-circular pcb boards by coupling together in the mode of contact pin coiling between two outer via holes of stitching portion.
Every α even angle, outer via hole is set around ring-shaped P CBBan center, every 2 α even angle, interior via hole is set, described middle via hole is disposed between two interior via holes; And outer via hole is alternately corresponding with interior via hole and middle via hole, and corresponding two via holes and ring-shaped P CB plate is centered close on same straight line mutually.
Described α is 5 °, and the outer via hole on monolithic semi-circular pcb board has 36, and interior via hole has 18, and middle via hole has 17.
On described ring-shaped P CB plate, be provided with at least three connection keyways 1, and described connection keyway is on same annulus.
Described two halves ring-shaped P CB plate forms concavo-convex two staggered openings in stitching portion along the line.
Described two halves ring-shaped P CB plate relies on insulating press boards 3 fixing, and described insulating press boards covers on opening along the line 5, makes one end of insulating press boards be positioned at first ring-shaped P CB plate, and the other end is positioned at second ring-shaped P CB plate; Described insulating press boards is fixed its two ends by fixing lock 4 again.
On described first ring-shaped P CB plate or second ring-shaped P CB plate, be also provided with two wiring holes 9.
With reference to Fig. 1, this ring-shaped P CB plate is spliced and combined and is formed by first ring-shaped P CB plate A and second ring-shaped P CB plate B, and two halves ring-shaped P CB plate has formed concavo-convex staggered two openings along the line 5 in stitching portion.Two edges of every semi-circular pcb board all present concavo-convex staggered square-wave-shaped, and two edges of first ring-shaped P CB plate can just agree with and mate with two edges of next ring-shaped P CB plate, what make that two semi-circular pcb boards can be complete is stitched together, and will form two concavo-convex staggered openings in its stitching portion along the line after splicing is good.This concavo-convex staggered splicing design can make that two semi-circular pcb boards are more stable, position is accurately splicing together, and make follow-up fixing step operation also convenient.
Two halves ring-shaped P CB plate relies on insulating press boards to fix, and described insulating press boards covers on opening is along the line, makes one end of insulating press boards be positioned at first ring-shaped P CB plate, and the other end is positioned at second ring-shaped P CB plate; Described insulating press boards is fixed its two ends by fixing lock again.After two semi-circular pcb boards splice well, insulating press boards is being covered on opening is along the line, then with fixing lock, the two ends of insulating press boards are being fixed on ring-shaped P CB plate, realize the splicing of two semi-circular pcb boards and fixing operation.
The pattern of ring-shaped P CB plate is: via hole, outer via hole and middle via hole in arranging accordingly on inner layer ring, outer layer ring and middle layer ring, and around ring-shaped P CBBan center, every α angle, outer via hole is set, every 2 α angles, interior via hole is set, being arranged between two interior via holes of span crossed in centre.Therefore, middle via hole than interior via hole few.Taking α as 5 ° as example, the outer via hole on every semi-circular pcb board can arrange 36, and interior via hole can arrange 18, and middle via hole can arrange 17.And outer via hole and interior via hole and middle via hole are alternately corresponding, that is to say, certain outer via hole is for an interior via hole, and Next outer via hole is via hole in the middle of corresponding, more next outer via hole corresponding again in via hole, the correspondence that replaces like this.Described corresponded manner refers to, being centered close on same straight line of outer via hole, interior via hole and ring-shaped P CB plate; Or being centered close on same straight line of outer via hole, middle via hole and ring-shaped P CB plate.Due to the interior via hole on every semi-circular pcb board add in the middle of the quantity of via hole than the quantity of outer via hole few one, therefore, corresponding with it at the accordingly not middle via hole of an outer via hole of certain splicing edge of semi-circular pcb board.
The wire laying mode of ring-shaped P CB plate is: the wiring that realize ring-shaped P CB plate first will be to every semi-circular pcb board wiring.Fig. 2 is that two halves ring-shaped P CB plate divides other structure and wiring schematic diagram, shown in Fig. 2, two wiring holes are arranged on second ring-shaped P CB plate, wire from second ring-shaped P CB plate reverse side by wiring hole a arrive positive (the place that there is no wiring hole be directly from via hole arrive positive), then arrive again reverse side by a nearest interior via hole d, at a between d being front wire 2; And then arriving front by the outer via hole e corresponding with this interior via hole d, d is between e being reverse side wire; So operation has just formed large wire turn; Arrive reverse side by the middle via hole b adjacent with this outer via hole e more afterwards, then arrive front by the outer via hole c corresponding with this centre via hole b, so operation has just formed little wire turn.After the wiring of little wire turn, wire is cross over next outer via hole place again, make wire can be again from this via hole be that starting point repeats large wire turn and connects up.The wire laying mode of large wire turn ensures the symmetry of wiring, thereby ensures the accuracy of sensor measurement; Although the wire laying mode of little wire turn cannot ensure the symmetry of wiring, this kind of design can ensure to make full use of the space of pcb board, thereby reduces the dispersiveness through coil flux, the accuracy that further improves sensor measurement.
The wiring route of two halves ring-shaped P CB plate is identical, open type design due to what adopt, must cause being routed in opening part on plate and disconnect, therefore between the wiring route between two semi-circular pcb boards is by the two outer via holes in stitching portion, couple together in the mode of contact pin coiling.With reference to Fig. 1, the outer via hole place that is therefore e, f at label arranges contact pin, ensures that by the mode of coiling wire connects, same so operation in another stitching portion.So wiring makes wire penetrate from wiring hole a, finally passes from another wiring hole, completes the wiring of a ring-shaped P CB plate.
Current sensor of the present invention will be composed in series by two rings shape pcb board.Fig. 3 is the total system embodiment figure that the present invention measures electric current, shown in Fig. 3, whole system comprises Sensor section and hardware circuit part, Sensor section is identical by two pcb boards, by wire, two boards sub-connection is got up, to ensure that two blocks of ring-shaped P CB plates are coaxial simultaneously, connection keyway of the present invention plays co-axially fixed effect exactly, can ensure again that two ring-shaped P CB plate upper conductors surround area and overlap, thereby play the effect of eliminating perpendicular to sensor plane external disturbance magnetic field simultaneously.Connecting keyway can arrange more than three or three.In the time that connection keyway is three, angle is between any two 120 °.This kind of design can be good at solving the interference perpendicular to PCB surface external magnetic field, thereby improve the jamproof ability of sensor, thereby ensured the measuring accuracy of sensor, the series connection of two identical pcb boards simultaneously can improve the output signal of sensor, is convenient to the design of subsequent acquisition circuit.
Fig. 4 is the hardware circuit schematic diagram of detection system in Fig. 3, and with reference to Fig. 4, the hardware circuit part of this system has comprised signal processing circuit and processor circuit.Signal processing circuit comprises amplifying circuit, filtering circuit, integrating circuit and A/D change-over circuit; Processor circuit comprises by single-chip microcomputer and peripheral circuit thereof, comprises LCDs, button, power supply etc.
Finally explanation is, above preferred embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is described in detail by above preferred embodiment, but those skilled in the art are to be understood that, can make various changes to it in the form and details, and not depart from the claims in the present invention book limited range.
Claims (7)
1. an open type semi-circular anti-interference current sensor, comprise two blocks of ring-shaped P CB plates, described ring-shaped P CB plate is spliced by two semi-circular pcb boards that are furnished with lead loop, it is characterized in that: via hole, middle via hole and outer via hole in being provided with accordingly on inner layer ring, middle layer ring and the outer layer ring of ring-shaped P CB plate, between the interior via hole-outer via hole of outer via hole-correspondence, pros and cons wiring forms large wire turn, the pros and cons little wire turn of formation that connects up between middle via hole-next outer via hole of outer via hole-adjacent; After little wire turn wiring, wire is cross over next outer via hole again and repeats large wire turn wiring; Large wire turn and little wire turn are alternately arranged on two semi-circular pcb boards, and the wiring route of two semi-circular pcb boards is identical; Wiring route between two semi-circular pcb boards by coupling together in the mode of contact pin coiling between two outer via holes of stitching portion.
2. open type semi-circular anti-interference current sensor according to claim 1, it is characterized in that: every α even angle, outer via hole is set around ring-shaped P CBBan center, every 2 α even angle, interior via hole is set, described middle via hole is disposed between two interior via holes; And outer via hole is alternately corresponding with interior via hole and middle via hole, and corresponding two via holes and ring-shaped P CB plate is centered close on same straight line mutually.
3. open type semi-circular anti-interference current sensor according to claim 2, is characterized in that: described α is 5 °, and the outer via hole on monolithic semi-circular pcb board has 36, and interior via hole has 18, and middle via hole has 17.
4. open type semi-circular anti-interference current sensor according to claim 1, is characterized in that: on described ring-shaped P CB plate, be provided with at least three connection keyways, and described connection keyway is on same annulus.
5. open type semi-circular anti-interference current sensor according to claim 1, is characterized in that: described two halves ring-shaped P CB plate forms concavo-convex two staggered openings in stitching portion along the line.
6. open type semi-circular anti-interference current sensor according to claim 1, it is characterized in that: described two halves ring-shaped P CB plate relies on insulating press boards to fix, described insulating press boards covers on opening is along the line, make one end of insulating press boards be positioned at first ring-shaped P CB plate, the other end is positioned at second ring-shaped P CB plate; Described insulating press boards is fixed its two ends by fixing lock again.
7. open type semi-circular anti-interference current sensor according to claim 1, is characterized in that: on described first ring-shaped P CB plate or second ring-shaped P CB plate, be also provided with two wiring holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410428205.XA CN104155501A (en) | 2014-08-27 | 2014-08-27 | Open type semi-annular anti-interference current sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410428205.XA CN104155501A (en) | 2014-08-27 | 2014-08-27 | Open type semi-annular anti-interference current sensor |
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| CN201410428205.XA Pending CN104155501A (en) | 2014-08-27 | 2014-08-27 | Open type semi-annular anti-interference current sensor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104377011A (en) * | 2014-11-20 | 2015-02-25 | 国家电网公司 | Half-open type electronic current transformer |
| CN104407200A (en) * | 2014-12-19 | 2015-03-11 | 国家电网公司 | Open type fault transient current sensor |
| CN109100558A (en) * | 2018-06-06 | 2018-12-28 | 中国电力科学研究院有限公司 | A kind of Rogowski coil and current measuring device |
| CN113970660A (en) * | 2021-09-21 | 2022-01-25 | 南京理工大学 | Open-close type annular PCB type pulse heavy current sensor |
| US11650269B2 (en) | 2021-08-25 | 2023-05-16 | Analog Devices International Unlimited Company | Split coil arrangement for non-disruptive measurement of axial magnetic flux as part of system to infer machine health |
-
2014
- 2014-08-27 CN CN201410428205.XA patent/CN104155501A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104377011A (en) * | 2014-11-20 | 2015-02-25 | 国家电网公司 | Half-open type electronic current transformer |
| CN104407200A (en) * | 2014-12-19 | 2015-03-11 | 国家电网公司 | Open type fault transient current sensor |
| CN104407200B (en) * | 2014-12-19 | 2017-07-11 | 国家电网公司 | A kind of open-type fault transient state current sensor |
| CN109100558A (en) * | 2018-06-06 | 2018-12-28 | 中国电力科学研究院有限公司 | A kind of Rogowski coil and current measuring device |
| US11650269B2 (en) | 2021-08-25 | 2023-05-16 | Analog Devices International Unlimited Company | Split coil arrangement for non-disruptive measurement of axial magnetic flux as part of system to infer machine health |
| CN113970660A (en) * | 2021-09-21 | 2022-01-25 | 南京理工大学 | Open-close type annular PCB type pulse heavy current sensor |
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Application publication date: 20141119 |