CN109787376A - A kind of induction electric energy transmission foreign substance detection system and method - Google Patents
A kind of induction electric energy transmission foreign substance detection system and method Download PDFInfo
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- CN109787376A CN109787376A CN201910023014.8A CN201910023014A CN109787376A CN 109787376 A CN109787376 A CN 109787376A CN 201910023014 A CN201910023014 A CN 201910023014A CN 109787376 A CN109787376 A CN 109787376A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000002184 metal Substances 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 230000001939 inductive effect Effects 0.000 claims description 4
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- 230000003321 amplification Effects 0.000 description 2
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
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- 238000003199 nucleic acid amplification method Methods 0.000 description 2
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Abstract
The invention discloses a kind of induction electric energy transmission foreign substance detection system and methods, it is related to induction electric energy transmission technique field, system includes: first coil group and first voltage detection circuit, first coil group includes at least one induction coil pair, the output end of induction coil pair connects the input terminal of the first voltage detection circuit, induction coil is to including the first induction coil and the second induction coil, the connection of the head end of the tail end of first induction coil and the second induction coil, the tail end of first induction coil and the second induction coil are formed in the fringe region of the induction coil pair to intersect, so that the magnetic field that the first induction coil and the second induction coil generate under normal conditions has fixed phasor difference, the present invention is by induction coil in first voltage detection circuit measurement first coil group to the voltage value of generation, judge whether charged area has metal Foreign matter solves the problems, such as that charged area there are metallic foreign body is likely to result in security risk in the prior art, and structure is simple, easy to use.
Description
Technical field
The present invention relates to induction electric energy transmission technique field, especially a kind of induction electric energy transmits foreign substance detection system
And method.
Background technique
Induction electric energy transmits (Inductive Power Transfer, IPT) technology and utilizes electromagnetic induction principle by electric energy
Electrical equipment end is transmitted to by power end in a non-contact manner, to realize wireless power transmission, is had safe and reliable, flexible
It is convenient, environmental-friendly, can all weather operations the advantages that, have received widespread attention in recent years.However, when having metallic foreign body (such as gold
Belong to fragment, coin, pop can etc.) when entering the energy transmission region being made of transmitting coil and receiving coil, it would be possible to it hinders
Hinder energy transmission or reduce energy transmission efficiency, or even causes pyrophoricity accident since metallic foreign body is heated continuously heating.
Therefore, in order to enable a system to safe and efficient work, it is necessary to a kind of system and method are invented, when there is metallic foreign body entrance
When energy transmission region, it has to be possible to accurately detected foreign matter.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention
One purpose is to provide a kind of system for being able to detect metallic foreign body.
For this purpose, a second object of the present invention is to provide a kind of methods that can detecte metallic foreign body.
The technical scheme adopted by the invention is that:
A kind of induction electric energy transmission foreign substance detection system, comprising: first coil group and first voltage detection circuit, institute
Stating first coil group includes at least one induction coil pair, and the output end of the induction coil pair connects the first voltage detection
The input terminal of circuit, the induction coil to include the first induction coil and the second induction coil, first induction coil
Tail end is connected with the head end of second induction coil, and the tail end of first induction coil and second induction coil are in institute
The fringe region for stating induction coil pair, which is formed, to intersect, so that first induction coil and the second induction coil generate under normal conditions
Magnetic field there is fixed phasor difference.
Further, the first coil group includes the 1st to N coil pair, and the first induction coil of the i-th coil pair is arranged
In the inside of the first induction coil of the (i-1)-th induction coil pair, the setting of the second induction coil of i-th coil pair is described the
The inside of second induction coil of i-1 induction coil pair, i=2,3 ... N.
It further, further include the second coil group and second voltage detection circuit, second coil group includes at least one
A induction coil pair, the output end of the induction coil pair connect the input terminal of the second voltage detection circuit, and described first
Coil group is Chong Die with the position of second coil group, output end direction is vertical.
Further, second coil group includes the 1st to M coil pair, and the first induction coil of jth coil pair is arranged
In the inside of the first induction coil of -1 induction coil pair of jth, the setting of the second induction coil of the jth coil pair is described the
The inside of second induction coil of j-1 induction coil pair, j=2,3 ... M.
Further, the first voltage detection circuit includes the first multi-channel electronic switch, the first difference amplifier and the
Bipolar voltage collector, the output end of the first coil group are connect with the input terminal of first multi-channel electronic switch,
The output end of first multi-channel electronic switch is connect with the input terminal of first difference amplifier, first differential amplification
Device output end is connect with the input terminal of the first bipolar voltage collector.
Further, the second voltage detection circuit includes the second multi-channel electronic switch, the second difference amplifier, second
Bipolar voltage collector, the output end of second coil group are connect with the input terminal of second multi-channel electronic switch, institute
The output end for stating the second multi-channel electronic switch is connect with the input terminal of second difference amplifier, second difference amplifier
Output end connect with the input terminal of the second bipolar voltage collector.
Further, first induction coil is identical with shape, the size of second induction coil, so that under normality
The fixed vector difference for the magnetic flux that first induction coil and the second induction coil generate is 0.
Further, the shape phase of the first coil group and the charging induction region of the inductive electric energy transmission system
Match.
The invention also discloses a kind of methods that can detecte metallic foreign body, including, it is examined using first voltage detection circuit
Whether whether the voltage for surveying the output of the first coil group be more than preset value to judge in the first coil group comprising metal
The position of foreign matter and/or metallic foreign body.
It further, further include the second coil group and second voltage detection circuit, the method also includes the second electricity of detection
The output voltage of pressure detection circuit determines the two-dimensional position of metallic foreign body.
Incude the beneficial effects of the present invention are: the present invention measures in first coil group by using first voltage detection circuit
Coil judges whether charged area has metallic foreign body to the voltage value of generation, solves charged area in the prior art and there is gold
The problem of belonging to foreign matter and being likely to result in security risk, structure is simple, easy to use.
In addition, the present invention also sets up the second coil group and second voltage detection circuit, by the way that first voltage inspection is comprehensively compared
The output of slowdown monitoring circuit and second voltage detection circuit is as a result, further position the position of foreign matter.
Detailed description of the invention
Fig. 1 is that a kind of structure of induction electric energy transmission the first specific embodiment of foreign substance detection system in the present invention is shown
It is intended to；
Fig. 2 is the line of induction in a kind of induction electric energy transmission the first specific embodiment of foreign substance detection system in the present invention
The structural schematic diagram of circle pair；
Fig. 3 is that a kind of structure of induction electric energy transmission second of specific embodiment of foreign substance detection system in the present invention is shown
It is intended to；
Fig. 4 is a kind of function knot of induction electric energy transmission the third specific embodiment of foreign substance detection system in the present invention
Structure schematic diagram；
Fig. 5 is a kind of function knot of induction electric energy transmission the 4th kind of specific embodiment of foreign substance detection system in the present invention
Structure schematic diagram；
Fig. 6 is a kind of process of induction electric energy transmission the first specific embodiment of metal foreign matter detecting method in the present invention
Figure；
Fig. 7 is a kind of process of induction electric energy transmission second of specific embodiment of metal foreign matter detecting method in the present invention
Figure.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
As shown in FIG. 1, FIG. 1 is a kind of knots of induction electric energy transmission one specific embodiment of foreign substance detection system of the present invention
Structure schematic diagram, comprising: first coil group and first voltage detection circuit, the first coil group include at least an induction coil
Right, the output end of the induction coil pair connects the input terminal of the first voltage detection circuit.
First coil group is placed in above charging magnetic field, when there is metallic foreign body to fall a certain line of induction in first coil group
When enclosing centering, which will change to the voltage of generation, can detect that the electricity by first voltage detection circuit
Buckling, so that it is determined that there is foreign matter to fall in the range of first coil group 1.
As shown in Fig. 2, induction coil is to including the first induction coil 4 and the second induction coil 5, first induction coil
4 and second induction coil 5 respectively include head end and tail end, the tail end 42 of first induction coil and second induction coil
Head end 43 connected by conducting wire 5, the tail end 42 of the first induction coil and second induction coil are in the induction coil pair
Fringe region formed and intersect so that the magnetic field that first induction coil and the second induction coil generate under normal conditions have it is solid
Fixed phasor difference.
In the design that the first induction coil 4 and the second induction coil 5 intersect in the edge of induction coil pair, it is possible to reduce
Check frequency in charged area improves detection efficiency.
Specifically, the first coil group includes the 1st to N coil pair, the first induction coil of i-th coil pair is set
It sets in the inside of the first induction coil of (i-1)-th induction coil pair, the second induction coil setting of i-th coil pair exists
The inside of second induction coil of (i-1)-th induction coil pair, the i=2,3 ... N.
As shown in Figure 1, in this implementation include the first induction coil to 1 and second induction coil to 2, second induction coils
2 pairs of the first induction coil and the second induction coil are located at the inside of first induction coil pair, so that same coil
Pair two induction coils distance it is remote as far as possible, two coils that can effectively reduce foreign matter along the same coil pair are symmetrical
And undetectable probability.
As shown in Fig. 2, calculating for convenience, the face of the first induction coil 4 and the second induction coil 5 is set in the present embodiment
Product is identical, and the first induction coil 4 and the second induction coil 5 are symmetrical with magnetic field when use and placed, the first induction coil 4 and second
The size for the magnetic flux that induction coil 5 passes through is identical, and current direction is on the contrary, the first induction coil 4 and the output of the second induction coil 5
Voltage difference be zero.
When first voltage detection circuit detects when bearing voltage greater than 0V of induction necklace pair, then induction coil pair is proved
In there is foreign matter to fall.
In practical application, due to detection coil pair mismachining tolerance, transmitting coil mismachining tolerance, detection circuit error etc.
The Distribution of Magnetic Field that may cause the first induction coil 4 and the second induction coil 5 is not fully identical, to generate centainly small
Voltage difference, which is to judge the first preset value whether coil pair has foreign matter to fall, when the output of induction coil pair
Prove there is foreign matter to fall when voltage is greater than preset value.
As shown in figure 3, first voltage detection circuit includes the first multi-channel electronic switch, the first difference amplifier and first pair
Polar voltages collector, the output end of the first coil group is connect with the input terminal of first multi-channel electronic switch, described
The output end of first multi-channel electronic switch is connect with the input terminal of first difference amplifier, and first difference amplifier is defeated
Outlet is connect with the input terminal of the first bipolar voltage collector.
First multi-channel electronic switch is used to control the coil pair that switching is output to the first difference amplifier, the first differential amplification
Device is for amplifying the output signal for being input to the first difference amplifier, and the first bipolar voltage collector is for judging the voltage
The size and Orientation of difference, when the voltage is positive value and is greater than first threshold, metallic foreign body is located at 4 institute of the first induction coil
In region, for negative value and when absolute value is greater than first threshold, metallic foreign body was located at where the second induction coil 5 voltage at that time
Region, when the voltage is positive value and is greater than first threshold at that time, metallic foreign body is located at 4 region of the first induction coil, leads to
It crosses the first multi-channel electronic switch of setting and the voltage of induction coil pair is output to the first difference amplifier and first pair in turn in turn
Polar voltages collector can reduce hardware cost, improve the practical efficiency of hardware.
As shown in figure 4, in another embodiment further including the second coil in order to further determine the position of metallic foreign body
Group and second voltage detection circuit, second coil group include at least an induction coil pair, the induction coil pair it is defeated
Outlet connects the input terminal of the second voltage detection circuit, the position weight of the first coil group and second coil group
It is folded, the direction of output end is vertical.
Second coil group includes the 1st to M coil pair, and the first induction coil setting of the jth coil pair is described the
Second induction coil of the inside of the first induction coil of j-1 induction coil pair, the jth coil pair is arranged in the jth -1
The inside of second induction coil of induction coil pair, the j=2,3 ... M.
The second coil group includes first coil to (B1-1, B1-2) and the second coil to (B2-1, B2-2) in the present embodiment,
Wherein the first induction coil setting B2-1 of (B2-1, B2-2) is arranged in first coil to (B1-1, B1-2) in the second coil
The second induction coil setting B2-2 of (B2-1, B2-2) is arranged first in the inside of first induction coil B1-1, the second coil
Inside of the coil to the second induction coil B1-2 of (B1-1, B1-2).
Specifically, the second voltage detection circuit includes the second multi-channel electronic switch, the second difference amplifier, second pair
Polar voltages collector, the output end of second coil group is connect with the input terminal of second multi-channel electronic switch, described
The output end of second multi-channel electronic switch is connect with the input terminal of second difference amplifier, second difference amplifier
Output end is connect with the input terminal of the second bipolar voltage collector.
It is consistent with aforementioned principles, can further it be sentenced by the second bipolar voltage Acquisition Circuit and the second multipath control switch
Disconnected metallic foreign body falls position, and the first multi-channel electronic switch controls the switch conduction of the coil pair of (A1-1 and A1-2), and the
When the output of bipolar voltage collector is positive value and is greater than the first preset value, it can determine whether out that metallic foreign body is fallen in A1-1 line
The region of circle, further, when the switch conduction of the coil pair of the second multi-channel electronic switch control (B1-1, B1-2), second
The output of bipolar voltage collector is negative value, and absolute value is greater than the second preset value, can determine whether out that metallic foreign body is located at coil
In the range of B1-2, to sum up, it can determine whether out that metallic foreign body falls the intersection in coil A1-1 and coil B1-2.
As shown in figure 5, in first coil group and the second coil group induction coil shape can flexible setting as required,
Fig. 5 is charging induction region when being circle, and first coil group and the second coil group are fitted the schematic diagram of round detection zone, former
Reason with it is above-mentioned identical.
As shown in fig. 6, the invention also provides a kind of induction electric energies to transmit metal foreign matter detecting method, including walk as follows
It is rapid:
S2, whether the voltage that the output of the first coil group is detected using first voltage detection circuit is more than preset value,
If so, include metallic foreign body in the first coil group, the size of the preset value be when induction coil be internally not present it is different
Output voltage when object.
It can the specific coil that falls of foreign matter according to the positive and negative values of voltage.
The output voltage of S4, detection second voltage detection circuit determine the specific location of metallic foreign body.
When confirmation has metallic foreign body, then second voltage detection circuit is connected, detection efficiency can be improved, economize on resources.
As shown in fig. 7, in another embodiment, including the following steps:
S1 controls the induction coil in the first coil group to sequentially turning on using the first multi-channel electronic switch；
Whether S2, the voltage for detecting the output of the first coil group using first voltage detection circuit are default more than first
Value, if entering step S3.
S3 controls the induction coil in second coil group to sequentially turning on using the second multi-channel electronic switch；
The output voltage of S4, detection second voltage detection circuit determine the specific location of metallic foreign body.
It is connected in turn by the first multi-channel electronic switch of setting and the second multi-channel electronic switch, hardware cost can be reduced, mentioned
High hardware availability ratio.
It is to be illustrated to preferable implementation of the invention, but the invention is not limited to the implementation above
Example, those skilled in the art can also make various equivalent variations on the premise of without prejudice to spirit of the invention or replace
It changes, these equivalent deformations or replacement are all included in the scope defined by the claims of the present application.
Claims (10)
1. a kind of induction electric energy transmits foreign substance detection system, it is applied to inductive electric energy transmission system, which is characterized in that packet
Include: first coil group and first voltage detection circuit, the first coil group include at least one induction coil pair, the induction
The output end of coil pair connects the input terminal of the first voltage detection circuit, and the induction coil is to including the first induction coil
With the second induction coil, the tail end of first induction coil is connected with the head end of second induction coil, first sense
It answers the tail end of coil and second induction coil to be formed in the fringe region of the induction coil pair to intersect, so that under normal conditions
The magnetic field that first induction coil and the second induction coil generate has fixed phasor difference.
2. a kind of induction electric energy according to claim 1 transmits foreign substance detection system, which is characterized in that described first
Coil group includes the 1st to N coil pair, and the first sense of the (i-1)-th induction coil pair is arranged in the first induction coil of the i-th coil pair
The inside of coil is answered, second line of induction of (i-1)-th induction coil pair is arranged in the second induction coil of i-th coil pair
The inside of circle, i=2,3 ... N.
3. a kind of induction electric energy according to claim 1 transmits foreign substance detection system, which is characterized in that further include the
Two coil group and second voltage detection circuit, second coil group include at least an induction coil pair, the induction coil
Pair output end connect the input terminal of the second voltage detection circuit, the position of the first coil group and second coil group
It is vertical to set overlapping, the direction of output end.
4. a kind of induction electric energy according to claim 3 transmits foreign substance detection system, which is characterized in that described second
Coil group includes the 1st to M coil pair, and the first sense of -1 induction coil pair of jth is arranged in the first induction coil of jth coil pair
The inside of coil is answered, second line of induction of -1 induction coil pair of jth is arranged in the second induction coil of the jth coil pair
The inside of circle, j=2,3 ... M.
5. a kind of induction electric energy according to claim 1 or 2 transmits foreign substance detection system, which is characterized in that described
First voltage detection circuit includes the first multi-channel electronic switch, the first difference amplifier and the first bipolar voltage collector, institute
The output end for stating first coil group is connect with the input terminal of first multi-channel electronic switch, first multi-channel electronic switch
Output end is connect with the input terminal of first difference amplifier, the first difference amplifier output end and described first bipolar
Property voltage collector input terminal connection.
6. a kind of induction electric energy according to claim 3 or 4 transmits foreign substance detection system, which is characterized in that described
Second voltage detection circuit includes the second multi-channel electronic switch, the second difference amplifier, the second bipolar voltage collector, described
The output end of second coil group is connect with the input terminal of second multi-channel electronic switch, second multi-channel electronic switch it is defeated
Outlet is connect with the input terminal of second difference amplifier, the output end of second difference amplifier and described second bipolar
Property voltage collector input terminal connection.
7. a kind of induction electric energy according to claim 1 transmits foreign substance detection system, which is characterized in that described first
Induction coil is identical with shape, the size of second induction coil, so that first induction coil and the second sense under normality
The fixed vector difference for the magnetic flux for answering coil to generate is 0.
8. a kind of induction electric energy according to claim 1 transmits foreign substance detection system, which is characterized in that described first
Coil group and the shape of the charging induction region of the inductive electric energy transmission system match.
9. a kind of induction electric energy transmits metal foreign matter detecting method, it is applied to the described in any item induction electric energies of claim 1 to 8
Transmit foreign substance detection system, which is characterized in that the output of the first coil group is detected using first voltage detection circuit
Voltage whether be more than preset value judge in the first coil group whether the position comprising metallic foreign body and/or metallic foreign body
It sets.
10. a kind of induction electric energy according to claim 9 transmits metal foreign matter detecting method, further include the second coil group and
Second voltage detection circuit, the method also includes the output voltage of detection second voltage detection circuit determines metallic foreign body
Two-dimensional position.
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| CN201910023014.8A CN109787376B (en) | 2019-01-10 | 2019-01-10 | Inductive power transfer metal foreign matter detection system and method |
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| CN201910023014.8A CN109787376B (en) | 2019-01-10 | 2019-01-10 | Inductive power transfer metal foreign matter detection system and method |
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| CN113031085A (en) * | 2020-08-28 | 2021-06-25 | 深圳大学 | Method for constructing metal foreign body detection coil and metal foreign body detection system |
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| CN109787376B (en) | 2024-04-02 |
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