CN108872894A - A kind of high quality factor difference coil combination for wireless charging foreign bodies detection - Google Patents
A kind of high quality factor difference coil combination for wireless charging foreign bodies detection Download PDFInfo
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- CN108872894A CN108872894A CN201810766186.XA CN201810766186A CN108872894A CN 108872894 A CN108872894 A CN 108872894A CN 201810766186 A CN201810766186 A CN 201810766186A CN 108872894 A CN108872894 A CN 108872894A
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- coils
- lead
- quality factor
- high quality
- circuit
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- 238000001514 detection method Methods 0.000 title claims description 27
- 238000001914 filtration Methods 0.000 claims abstract description 13
- 238000005070 sampling Methods 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims 1
- 238000005868 electrolysis reaction Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 9
- 239000002184 metal Substances 0.000 abstract description 9
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 229920001342 Bakelite® Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 206010044565 Tremor Diseases 0.000 description 1
- 239000004637 bakelite Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012546 transfer Methods 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
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
- G01R33/341—Constructional details, e.g. resonators, specially adapted to MR comprising surface coils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F5/00—Coils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F5/00—Coils
- H01F5/04—Arrangements of electric connections to coils, e.g. leads
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The present invention discloses a kind of high-quality difference coil combination, its lead-out wire accesses the ac input end of current rectifying and wave filtering circuit (2), direct current is obtained by current rectifying and wave filtering circuit (2), resistance 2 is divider resistance, resistance 1 is sampling resistor, and sampling resistor is direct current sampling end, and direct current sampling end accesses capture card (4), by the voltage value of single-chip microcontroller acquisition high quality factor difference coil combination, while collected data are sent to host computer (5) by single-chip microcontroller.The present invention whether there is metallic foreign body between can detect transmission coil, and will test result and feed back to host computer, if discovery metal, alarms, and judge the position of metallic foreign body in time, guarantee the safety of user and equipment.
Description
Technical field
The invention belongs to wireless power transmission field, in particular to a kind of high-quality for wireless charging foreign bodies detection because
Number difference coil combination.
Background technique
Convenient, fast due to wireless charging, more and more electrical equipments all use wireless charging.But wireless charging
After being mixed into metallic foreign body between coupling mechanism, METAL HEATING PROCESS can generate a series of problems.
Metal foreign matter detecting method is divided into electrical parameters detection and ancillary coil detection between existing wireless charging coupling mechanism
Two classes, electric parameter detecting method detection accuracy is not high, and height relies on the stability of both-end communication, can only examine to big metal
It surveys, accurate judgement cannot be carried out to metal sites.Existing ancillary coil detection method detection accuracy have it is to be strengthened, can not be right
The position of metallic foreign body is judged.
Summary of the invention
In view of this, the present invention devises a kind of high-quality difference coil combination to carry out metallic foreign body detection, can detect
It whether there is metallic foreign body between transmission coil, and will test result and feed back to host computer, if discovery metal, alarms in time,
And judge the position of metallic foreign body, guarantee the safety of user and equipment.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
A kind of high quality factor difference coil combination for wireless charging foreign bodies detection, including four identical rectangular lines
Circle, respectively Line 1 circle, No. 2 coils, No. 3 coils, No. 4 coils；Line 1 circle forward direction is put, and No. 2 coils are reversely put, and No. 3
Coil forward direction is put, and No. 4 coils are reversely put；The chip interconnection of the lead of Line 1 circle and No. 2 coils, No. 2 coils it is outer
Lead is connected with the outer lead of No. 3 coils, and the lead of No. 4 coils is connected with the lead of No. 3 coils, Line 1 circle and 4
The outer lead of number coil is as lead-out wire.
Further, the ac input end of lead-out wire access current rectifying and wave filtering circuit (2), passes through current rectifying and wave filtering circuit
(2) sample circuit (3), capture card (4), host computer (5) are sequentially connected.
Further, the current rectifying and wave filtering circuit (2) is made of rectification circuit and filter circuit；Rectification circuit uses full-bridge
Rectification；Filter circuit use CCB capacitor and electrolytic capacitor, wherein CCB capacitor is connected in parallel on behind rectification circuit, electrolytic capacitor with adopt
Sampling resistor in sample circuit (3) is in parallel.
Further, the sample circuit (3) is made of two high-accuracy resistance, is divided into divider resistance and sampling resistor,
It is connected in series in circuit.
Further, the capture card (4) is mainly made of single-chip microcontroller and analog-digital converter, and single-chip microcontroller uses
STM32F104ZET6 type single-chip microcontroller, analog-digital converter use AD7606 chip.
Compared with the existing technology, the present invention has the advantage that：
(1) it whether there is metallic foreign body between the detectable transmission coil of the present invention, and will test result and feed back to host computer, if
It was found that metal, alarms in time, and judges the position of metallic foreign body, guarantee the safety of user and equipment.
(2) present invention is detected using high quality factor difference coil combination, detection accuracy can be improved, and to metal
The position of foreign matter is accurately judged, ensure that the reliability and safety of wireless charging.
Detailed description of the invention
Fig. 1 is integral layout figure of the invention；
Fig. 2 is high quality factor difference coil composite configuration figure of the invention；
Fig. 3 is high quality factor difference coil assembled dimension figure of the invention；
Fig. 4 is straightening and filtering unit figure of the invention；
Fig. 5 is detection device integral layout figure of the invention；
Fig. 6 is detection device specific experiment conclusion figure of the present invention；
Fig. 7 is detection device experimental implementation figure of the present invention；
Fig. 8 is metallic foreign body of the invention (aluminium flake) operation diagram in detection coil different location；(1) of Fig. 8, (2),
It (3) is experiment testing sequence；
Fig. 9 is waveform diagram of detection device detection metallic foreign body (aluminium flake) of the present invention in detection coil different location.
Wherein,
(1) high quality factor difference coil combination；
(2) current rectifying and wave filtering circuit；
(3) sample circuit；
(4) capture card；
(5) host computer.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 1, for a kind of wireless charging detection device for foreign matter of the present invention and method high quality factor difference coil group
The integral layout figure of conjunction includes：(1) high quality factor difference coil combination；(2) current rectifying and wave filtering circuit；(3) sample circuit；
(4) capture card；(5) host computer.It is 0 that high quality factor difference coil combination (1) stabilizes the output voltage value under normal circumstances, when
When metallic foreign body introduces, so that the voltage of its difference coil combination is generated variation, pass through current rectifying and wave filtering circuit (2)；Sample circuit (3)
Output voltage values, pass through capture card (4) collection voltages and transfer data on host computer (5) and shown, host computer (5) is aobvious
The changed coil combination of voltage is shown and is alarmed, has detection accuracy high, stability is strong, and position accurate judgement etc. is excellent
Point.
As shown in Fig. 2, being the high quality factor difference coil combination of apparatus of the present invention, the coiling sequence of coil is lifted one's head from outside
It is put counterclockwise around inwardly lifting one's head for the forward direction of coil, coiling sequence is lifted one's head from outside clockwise about inwardly lifting one's head reversely to put,
So the disposing way of four coils is：Line 1 circle it is positive (positive 1), No. 2 coils it is reversed (anti-1), No. 3 coil forward directions (positive 2), 4
Reversed (anti-2) of number coil.The chip interconnection of the lead of Line 1 circle and No. 2 coils in Fig. 2, the outer lead and 3 of No. 2 coils
The outer lead of number coil is connected, and the lead of No. 3 coils is connected with the lead of No. 4 coils, No. 1 and No. 4 coil it is outer
Lead is the lead-out wire of difference coil combination, and four coil combinations are poor in the disturbance of no foreign matter at a difference coil combination
Voltage between the lead-out wire of sub-coil combination is 0, and in foreign matter disturbance, the voltage between the lead-out wire of difference coil combination is non-zero
Value.
As shown in figure 3, the specific size parameter of the high quality factor difference coil combination (1) for apparatus of the present invention, coil
Outer diameter 23mm, internal diameter 9mm, outer diameter 23mm, line footpath 1mm, thick 2mm, the copper wire line wrapped up using high temperature resistant by enameled wire is around 18
Circle forms, and coil and coil-span are 2mm, and plate spacing is 1mm to coil on earth, and bottom plate uses material for 50mm*50mm bakelite plate.
As shown in figure 4, being straightening and filtering unit figure of the invention, the lead-out wire of high-quality difference coil combination accesses rectification
The ac input end of filter circuit (2) obtains direct current by current rectifying and wave filtering circuit (2), and resistance 2 is divider resistance, and resistance 1 is
Sampling resistor, sampling resistor are direct current sampling end, and direct current sampling end accesses capture card (4), acquires high quality factor by single-chip microcontroller
The voltage value of difference coil combination, while collected data are sent to host computer (5) by single-chip microcontroller, host computer passes through a series of
Whether there is metallic foreign body to be mixed between logic judgment transmission coil, and shows the specific location of metal.
As shown in figure 5, being the integral layout figure of apparatus of the present invention, detection device of the invention is whole by 16 groups of difference coils
It is composed, combining and combining spacing is 2mm, between combined coil floor and bottom plate closely.
As shown in fig. 6, detecting the specific experiment conclusion obtained for detection device of the present invention, the present invention is capable of detecting when aluminium flake
(25mm*25mm), unitary coin (diameter 25mm), half a buck (diameter 2cm), clip (30mm*8mm).It is realized in Fig. 6
The concrete operation step of effect is：Stationary state is tested first, is sequentially placed into aluminium flake, unitary coin, half a buck, clip,
The position put every time is the center of coil, is not exposed to coil, is put into duration 5 seconds；Then dither state is tested, is sequentially placed into and trembles
Dynamic aluminium flake, unitary coin, half a buck, clip, the direction of shake as shown in fig. 7,2 seconds a cycles of buffeting speed (from
A little enter and point out again from same as a cycle).
As shown in figure 8, describe the test method that metallic foreign body is placed on to detection coil different location, serial number (1) in figure,
(2), (3) are experiment testing sequence, and single-chip microcontroller can detect different voltage values, as shown in figure 9, obtained for the test method
Waveform diagram.
The waveform diagram obtained by the test according to the above detection method is available, and the present invention can be detected accurately
Whether metallic foreign body has been mixed into during wireless charging between transmission coil, and detection effect is obvious, judges by host computer (5)
The position of golden foreign matter, and being alarmed, it was demonstrated that high quality factor difference coil combination is suitably applied wireless charging gold
Belong in detection device for foreign matter, it was demonstrated that the invention has very high practical value and good development prospect.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of high quality factor difference coil combination for wireless charging foreign bodies detection, it is characterised in that：Including four phases
Same square coil, respectively Line 1 circle, No. 2 coils, No. 3 coils, No. 4 coils；Line 1 circle forward direction is put, and No. 2 coils are anti-
To putting, No. 3 coil forward directions are put, and No. 4 coils are reversely put；The chip interconnection of the lead of Line 1 circle and No. 2 coils, 2
The outer lead of number coil is connected with the outer lead of No. 3 coils, and the lead of No. 4 coils is connected with the lead of No. 3 coils,
The outer lead of Line 1 circle and No. 4 coils is as lead-out wire.
2. high quality factor difference coil combination according to claim 1, it is characterised in that：The lead-out wire access rectification
The ac input end of filter circuit (2) is sequentially connected sample circuit (3), capture card (4), upper by current rectifying and wave filtering circuit (2)
Machine (5).
3. high quality factor difference coil combination according to claim 2, it is characterised in that：The current rectifying and wave filtering circuit
(2) it is made of rectification circuit and filter circuit；Rectification circuit uses full-bridge rectification；Filter circuit is using CCB capacitor and electrolysis electricity
Hold, wherein CCB capacitor is connected in parallel on behind rectification circuit, and electrolytic capacitor is in parallel with the sampling resistor in sample circuit (3).
4. high quality factor difference coil combination according to claim 2, it is characterised in that：The sample circuit (3) by
Two high-accuracy resistance compositions, are divided into divider resistance and sampling resistor, are connected in series in circuit.
5. high quality factor difference coil combination according to claim 2, it is characterised in that：The capture card (4) is main
It is made of single-chip microcontroller and analog-digital converter, single-chip microcontroller uses STM32F104ZET6 type single-chip microcontroller, and analog-digital converter uses
AD7606 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810766186.XA CN108872894A (en) | 2018-07-12 | 2018-07-12 | A kind of high quality factor difference coil combination for wireless charging foreign bodies detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810766186.XA CN108872894A (en) | 2018-07-12 | 2018-07-12 | A kind of high quality factor difference coil combination for wireless charging foreign bodies detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108872894A true CN108872894A (en) | 2018-11-23 |
Family
ID=64301707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810766186.XA Pending CN108872894A (en) | 2018-07-12 | 2018-07-12 | A kind of high quality factor difference coil combination for wireless charging foreign bodies detection |
Country Status (1)
| Country | Link |
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| CN (1) | CN108872894A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110103744A (en) * | 2019-06-21 | 2019-08-09 | 天津工业大学 | Metallic foreign body for wireless charging system for electric automobile expels device |
| CN110924121A (en) * | 2019-11-22 | 2020-03-27 | 江苏开创检测技术有限公司 | Detection device of clothing needle detector |
| CN111856591A (en) * | 2020-07-10 | 2020-10-30 | 国网天津市电力公司 | Three-dimensional coil metal foreign matter detection device |
| CN111917196A (en) * | 2020-07-09 | 2020-11-10 | 中国电力科学研究院有限公司 | Wireless charging foreign matter detection system, wireless charging system and charging method |
-
2018
- 2018-07-12 CN CN201810766186.XA patent/CN108872894A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110103744A (en) * | 2019-06-21 | 2019-08-09 | 天津工业大学 | Metallic foreign body for wireless charging system for electric automobile expels device |
| CN110103744B (en) * | 2019-06-21 | 2023-11-21 | 天津工业大学 | Metal foreign body driving device for wireless charging system of electric automobile |
| CN110924121A (en) * | 2019-11-22 | 2020-03-27 | 江苏开创检测技术有限公司 | Detection device of clothing needle detector |
| CN111917196A (en) * | 2020-07-09 | 2020-11-10 | 中国电力科学研究院有限公司 | Wireless charging foreign matter detection system, wireless charging system and charging method |
| CN111856591A (en) * | 2020-07-10 | 2020-10-30 | 国网天津市电力公司 | Three-dimensional coil metal foreign matter detection device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181123 |
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| WD01 | Invention patent application deemed withdrawn after publication |