CN109917467A - Detect system, wireless transmitter and the wireless power supply system of metallic foreign body - Google Patents
Detect system, wireless transmitter and the wireless power supply system of metallic foreign body Download PDFInfo
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- CN109917467A CN109917467A CN201711328338.XA CN201711328338A CN109917467A CN 109917467 A CN109917467 A CN 109917467A CN 201711328338 A CN201711328338 A CN 201711328338A CN 109917467 A CN109917467 A CN 109917467A
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- 238000001514 detection method Methods 0.000 claims abstract description 32
- 230000010355 oscillation Effects 0.000 claims description 45
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000005672 electromagnetic field Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 241001425718 Vagrans egista Species 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 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
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- 230000035945 sensitivity Effects 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
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Abstract
The invention discloses a kind of system, wireless transmitter and wireless power supply systems for detecting metallic foreign body, include oscillator coil, the oscillator for generating oscillator signal；The amplitude detecting device that the connection of the output end of input terminal and oscillator, output end and wireless transmitter connect, output control signal, is stopped working when being less than preset threshold for the amplitude in oscillator signal with controlling wireless transmitter.In the application, oscillator generates oscillator signal, if there are metallic foreign bodies on transmitting coil, then transmitting coil can generate vortex under the action of oscillator signal, consume the energy of oscillator, so that the amplitude of oscillator signal is decreased obviously, to just can accurately judge with the presence or absence of metallic foreign body on transmitting coil according to the amplitude of oscillator signal and control wireless transmitter when there are metallic foreign body to stop working, on the one hand, detection accuracy is high, on the other hand, the job security and reliability of wireless transmitter are improved.
Description
Technical field
The present invention relates to foreign material detecting technique fields, more particularly to a kind of system, wireless transmission for detecting metallic foreign body
Machine and wireless power supply system.
Background technique
With the development of wireless power technology, wireless power supply system has also obtained significant progress.Wireless power supply system packet
Wireless transmitter and wireless receiver are included, wireless transmitter includes transmitting coil and controller.When there are metals on transmitting coil
When foreign matter, transmitting coil can generate vortex and be generated heat under the action of electromagnetic wave, cause the damage of transmitting coil, so that wireless hair
The machine of penetrating can not work normally or even cause fire.
Therefore, how to provide a kind of scheme of solution above-mentioned technical problem is that those skilled in the art need to solve at present
Problem.
Summary of the invention
The object of the present invention is to provide it is a kind of detect metallic foreign body system, wireless transmitter and wireless power supply system, one
Aspect, detection accuracy is high, on the other hand, improves the job security and reliability of wireless transmitter.
In order to solve the above technical problems, being applied to wireless transmission the present invention provides a kind of system for detecting metallic foreign body
Machine, comprising:
Including oscillator coil, the oscillator for generating oscillator signal；
The amplitude detection dress that input terminal is connect with the output end of the oscillator, output end is connect with the wireless transmitter
It sets, output control signal, is stopped when being less than preset threshold for the amplitude in the oscillator signal with controlling the wireless transmitter
Only work.
Preferably, the amplitude detecting device includes:
The amplitude of amplitude of the input terminal as the input terminal of the amplitude detecting device, for detecting the oscillator signal is examined
Survey module；
For exporting the reference voltage module of the preset threshold；
First input end connect with the output end of the amplitude detection module, the second input terminal and the reference voltage module
Connection, comparator of the output end as the output end of the amplitude detecting device, for being less than in the amplitude of the oscillator signal
Output control signal, is stopped working when preset threshold with controlling the wireless transmitter.
Preferably, the frequency detecting device includes:
Input terminal as the input terminal of the amplitude detecting device, for the amplitude of the oscillator signal after detection filter
Amplitude detection module；
Input terminal connect with the output end of the amplitude detection module, output of the output end as the amplitude detecting device
The processor at end, output control signal when being less than preset threshold for the amplitude in the oscillator signal is described wireless to control
Transmitter stops working.
Preferably, the system also includes:
The warning device being connect with the amplitude detecting device, for being sounded an alarm when receiving the control signal.
Preferably, the warning device is buzzer.
Preferably, the oscillator is capacitance connecting three point type oscillator.
Preferably, the oscillator coil includes the oscillation subcoil group of N number of parallel connection, and each oscillation subcoil group includes
The connected oscillation subcoil be connected in series of 2 Same Name of Ends.
Preferably, the oscillator coil includes N number of concatenated oscillation subcoil group, and each oscillation subcoil group includes
The connected oscillation subcoil be connected in series of 2 Same Name of Ends.
In order to solve the above technical problems, the present invention also provides a kind of wireless transmitter, including controller and transmitting coil,
It further include the system of detection metallic foreign body as described above.
In order to solve the above technical problems, the present invention also provides a kind of wireless power supply system, including wireless receiver, including
Wireless transmitter as described above.
The present invention provides a kind of system, wireless transmitter and wireless power supply systems for detecting metallic foreign body, include
Oscillator coil, the oscillator for generating oscillator signal；The connection of the output end of input terminal and oscillator, output end and wireless transmission
The amplitude detecting device of machine connection, output control signal when being less than preset threshold for the amplitude in oscillator signal, to control nothing
Line transmitter stops working.
In the application, oscillator generates oscillator signal, if there are metallic foreign bodies on transmitting coil, in oscillator signal
Vortex can be generated by acting on lower transmitting coil, consume the energy of oscillator, so that the amplitude of oscillator signal is decreased obviously, thus according to
The amplitude of oscillator signal just can accurately judge on transmitting coil with the presence or absence of metallic foreign body and control when there are metallic foreign body
Wireless transmitter stops working, on the one hand, detection accuracy is high, on the other hand, improve wireless transmitter job security and
Reliability.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of structural schematic diagram of system for detecting metallic foreign body provided by the invention；
Fig. 2 is the structural schematic diagram of oscillator coil when a kind of N provided by the invention takes 2 and vibrates the series connection of subcoil group；
Fig. 3 is the structural representation of oscillator coil when a kind of N provided by the invention takes 2 and vibrates after subcoil group is first gone here and there simultaneously
Figure；
Fig. 4 is the application schematic diagram of oscillator coil shown in a kind of Fig. 2 provided by the invention；
Fig. 5 is the application schematic diagram of oscillator coil shown in a kind of Fig. 3 provided by the invention.
Specific embodiment
Core of the invention be to provide it is a kind of detect metallic foreign body system, wireless transmitter and wireless power supply system, one
Aspect, detection accuracy is high, on the other hand, improves the job security and reliability of wireless transmitter.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Fig. 1 is please referred to, Fig. 1 is a kind of structural schematic diagram of system for detecting metallic foreign body provided by the invention, is applied to
Wireless transmitter, the system include:
Including oscillator coil, the oscillator 1 for generating oscillator signal；
The amplitude detecting device 2 that input terminal is connect with the output end of oscillator 1, output end and wireless transmitter connect is used
Output control signal, is stopped working when the amplitude in oscillator signal is less than preset threshold with controlling wireless transmitter.
Specifically, oscillator 1 includes oscillation rings, and oscillation rings include oscillator coil and oscillating capacitance, in design, can be incited somebody to action
Oscillator coil be arranged to where transmitting coil transmitting drum shape, and oscillator coil be arranged right above transmitting coil and
Every pre-determined distance, to realize the detection to entire transmitting coil, detection range is increased.
At work, oscillator 1 generates oscillator signal, which can generate electromagnetic field, if do not had on transmitting coil
There is metallic foreign body, then the amplitude stability for the oscillator signal that oscillator 1 exports is in a particular value, and the particular value is greater than default threshold
Value.If transmitting coil can generate eddy current effect, consumption vibration under the action of electromagnetic field there are metallic foreign body on transmitting coil
The energy of device 1 is swung, so that the amplitude of oscillator 1 be caused to be decreased obviously, is based on this, amplitude detecting device 2 is detecting oscillation letter
Number amplitude after, judge whether amplitude is less than preset threshold, if it is, explanation is at this time on transmitting coil there are metallic foreign body,
Otherwise, illustrate that there is no metallic foreign bodies on transmitting coil at this time.There are after metallic foreign body on determining transmitting coil, oscillator signal
Wireless transmitter can be output control signals to, control wireless transmitter stops working.
It is understood that amplitude detecting device 2 is connect with wireless transmitter, it is not less than in the amplitude of oscillator signal default
When threshold value, amplitude detecting device 2 does not export control signal, and wireless transmitter maintains normal work when not receiving control signal
Make, and when the amplitude of oscillator signal is less than preset threshold, the output control signal of amplitude detecting device 2, wireless transmitter is connecing
It stops working after being controlled signal.Specifically, control signal here can be high level or low level, and the application is herein
It is not particularly limited.
In addition, in order to minimize interference of the electromagnetic field generated when transmitting coil work to 1 foreign bodies detection of oscillator, this
In oscillator signal frequency can much larger than transmitting coil issue signal frequency (in different number grade), for example, transmitting
The frequency for the signal that coil issues is 2kHz, and the frequency of oscillator signal is 3MHz, and for specific value, the application is not spy herein
Other restriction.
To sum up, in the application, oscillator 1 generates oscillator signal and is vibrating if there are metallic foreign bodies on transmitting coil
Transmitting coil can generate vortex under the action of signal, consume the energy of oscillator 1, so that the amplitude of oscillator signal is decreased obviously,
To just can accurately be judged on transmitting coil according to the amplitude of oscillator signal with the presence or absence of metallic foreign body and that there are metals is different
It controls wireless transmitter when object to stop working, on the one hand, detection accuracy is high, on the other hand, improves the work of wireless transmitter
Safety and reliability.
On the basis of the above embodiments:
As a kind of preferred embodiment, amplitude detecting device 2 includes:
The amplitude detection module of input terminal of the input terminal as amplitude detecting device 2, the amplitude for detection oscillator signal；
For exporting the reference voltage module of preset threshold；
First input end and the connection of the output end of amplitude detection module, the second input terminal connect with reference voltage module, are defeated
Comparator of the outlet as the output end of amplitude detecting device 2 exports when being less than preset threshold for the amplitude in oscillator signal
Signal is controlled, is stopped working with controlling wireless transmitter.
Specifically, pass through the amplitude of amplitude detection module detection oscillator signal, the amplitude conduct that then will test first
One input signal of comparator, the preset threshold that reference voltage module is generated as another input signal of comparator,
When the amplitude of oscillator signal is less than preset threshold, comparator exports corresponding level, specifically, if first input end is positive
Phase input terminal, the second input terminal are inverting input terminal, then when the amplitude of oscillator signal is less than preset threshold, comparator output is low
Level；If first input end is inverting input terminal, the second input terminal is normal phase input end, then when the amplitude of oscillator signal is less than
When preset threshold, comparator exports high level.Which kind of it is not particularly limited herein using mode the application specifically, according to reality
Situation is determined.The present embodiment selects comparator to carry out the judgement of the amplitude of oscillator signal, has the advantages of simple structure and easy realization and cost
It is low.
As a kind of preferred embodiment, frequency detecting device includes:
The amplitude of input terminal of the input terminal as amplitude detecting device 2, the amplitude for the oscillator signal after detection filter
Detection module；
Input terminal and the connection of the output end of amplitude detection module, place of the output end as the output end of amplitude detecting device 2
Device is managed, output control signal, stops working when being less than preset threshold for the amplitude in oscillator signal to control wireless transmitter.
Specifically, after the amplitude by amplitude detection module detection oscillator signal, the amplitude that will test is exported to place
Device is managed, which is compared by processor with preset threshold, the output control when the amplitude of oscillator signal is less than preset threshold
Signal is stopped working with controlling wireless transmitter.The present embodiment selects processor to carry out the judgement of the amplitude of oscillator signal, essence
Degree is high.
As a kind of preferred embodiment, system further include:
The warning device being connect with amplitude detecting device 2, for being sounded an alarm when receiving control signal.
Specifically, in order to avoid transmitting coil fever is even on fire, amplitude detecting device 2 is issued to the control of wireless transmitter
Signal processed is also sent to warning device, so that warning device sounds an alarm, to remind related personnel to carry out troubleshooting in time.
As a kind of preferred embodiment, warning device is buzzer.
Buzzer has the advantages that adjustable alert frequency, small in size, high sensitivity, power consumptive province and warning effect are good.Certainly,
Here warning device is not limited only to buzzer, can also be other warning devices, such as display device, the application are not done herein
It is special to limit.
As a kind of preferred embodiment, the system further include:
What is connect with amplitude detecting device 2 removes foreign matter device, for removing transmitting coil when receiving control signal
Foreign matter.
The application in order to improve detection metallic foreign body system the degree of automation, also within the system be provided with remove foreign matter
Device, when detect on transmitting coil there are when foreign matter, can control except foreign matter device removal transmitting coil on foreign matter.
As a kind of preferred embodiment, oscillator 1 is capacitance connecting three point type oscillator.
Oscillator 1 in the application can select high frequency oscillator, more specifically, select capacitance connecting three point type oscillator,
Capacitance connecting three point type oscillator have the advantages that output oscillator signal waveform closer to sine wave and oscillator signal it is stable
Advantage, certainly, oscillator 1 here can also be other kinds of oscillator, and the application is not particularly limited herein, according to
Actual conditions are determined.
As a kind of preferred embodiment, oscillator coil includes the oscillation subcoil group of N number of parallel connection, each oscillation subcoil
Group includes the connected oscillation subcoil be connected in series of 2 Same Name of Ends.
As a kind of preferred embodiment, oscillator coil includes N number of concatenated oscillation subcoil group, each oscillation subcoil
Group includes the connected oscillation subcoil be connected in series of 2 Same Name of Ends.
Specifically, transmitting coil provided by the present application, it is desirable that oscillation subcoil is symmetrical, and vibrates subcoil Same Name of Ends
Connection, in this way, even if generating very powerful electromagnetic field, being sensed on oscillator coil very strong when wireless transmitter works normally
Alternating voltage, as Same Name of Ends be connected and the alternating voltage sensed is cancelled out each other, to reduce wireless transmission
Influence when machine works normally to oscillator coil, improves the safety and functional reliability of system.
In addition, the oscillation subcoil in oscillator coil provided herein can all connect, after can also first going here and there simultaneously,
It specifically selects which kind of form the application not to be particularly limited herein, determines according to the actual situation.
Specifically ,-Fig. 5 referring to figure 2., wherein Fig. 2 is that a kind of N provided by the invention takes 2 and oscillation subcoil group series connection
When oscillator coil structural schematic diagram, Fig. 3 is when a kind of N provided by the invention takes 2 and vibrates after subcoil group first go here and there simultaneously
The structural schematic diagram of oscillator coil, Fig. 4 are the application schematic diagram of oscillator coil shown in a kind of Fig. 2 provided by the invention, and Fig. 5 is this
The application schematic diagram of oscillator coil shown in a kind of Fig. 3 provided is provided.
As it can be seen that the first oscillation subcoil group includes oscillation subcoil L1 and oscillation subcoil L3, wherein oscillation in Fig. 2
The Same Name of Ends of coil L1 is connected with the Same Name of Ends of oscillation subcoil L3, and the second oscillation subcoil group includes oscillation subcoil L2 and vibration
Vagrant's coil L4, wherein the Same Name of Ends of oscillation subcoil L2 is connected with the Same Name of Ends of oscillation subcoil L4；First oscillation subcoil
Group and the second oscillation subcoil group series connection.Fig. 4 is the shape of transmitting drum where oscillator coil shown in Fig. 2 is arranged to transmitting coil
Shape.
In Fig. 3, the first oscillation subcoil group includes oscillation subcoil L1 and oscillation subcoil L3, wherein oscillation subcoil
The Same Name of Ends of L1 is connected with the Same Name of Ends of oscillation subcoil L3, and the second oscillation subcoil group includes oscillation subcoil L2 and oscillation
Coil L4, wherein the first oscillation subcoil group and the second oscillation subcoil group are in parallel.Fig. 5 is oscillator coil setting shown in Fig. 3
At the shape of transmitting drum where transmitting coil.
In order to solve the above technical problems, the present invention also provides a kind of wireless transmitter, including controller and transmitting coil,
It further include the system such as above-mentioned detection metallic foreign body.
In order to solve the above technical problems, the present invention also provides a kind of wireless power supply system, including wireless receiver, including
Such as above-mentioned wireless transmitter.
Above-described embodiment, the application are please referred to for the introduction of wireless transmitter provided by the invention and wireless power supply system
Details are not described herein.
It should be noted that in the present specification, relational terms such as first and second and the like are used merely to one
A entity or operation with another entity or operate distinguish, without necessarily requiring or implying these entities or operation it
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to
Cover non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or setting
Standby intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in the process, method, article or apparatus that includes the element.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of system for detecting metallic foreign body, is applied to wireless transmitter characterized by comprising
Including oscillator coil, the oscillator for generating oscillator signal；
The amplitude detecting device that input terminal is connect with the output end of the oscillator, output end is connect with the wireless transmitter,
Output control signal when being less than preset threshold for the amplitude in the oscillator signal stops work to control the wireless transmitter
Make.
2. the system as claimed in claim 1, which is characterized in that the amplitude detecting device includes:
The amplitude detection mould of amplitude of the input terminal as the input terminal of the amplitude detecting device, for detecting the oscillator signal
Block；
For exporting the reference voltage module of the preset threshold；
First input end is connect with the output end of the amplitude detection module, the second input terminal and the reference voltage module connect
It connects, comparator of the output end as the output end of the amplitude detecting device, is less than for the amplitude in the oscillator signal pre-
If output control signal, is stopped working when threshold value with controlling the wireless transmitter.
3. the system as claimed in claim 1, which is characterized in that the frequency detecting device includes:
The vibration of input terminal of the input terminal as the amplitude detecting device, the amplitude for the oscillator signal after detection filter
Width detection module；
Input terminal connect with the output end of the amplitude detection module, output end of the output end as the amplitude detecting device
Processor, output control signal when being less than preset threshold for the amplitude in the oscillator signal, to control the wireless transmission
Machine stops working.
4. the system as claimed in claim 1, which is characterized in that the system also includes:
The warning device being connect with the amplitude detecting device, for being sounded an alarm when receiving the control signal.
5. system as claimed in claim 4, which is characterized in that the warning device is buzzer.
6. the system as claimed in claim 1, which is characterized in that the oscillator is capacitance connecting three point type oscillator.
7. system as claimed in any one of claims 1 to 6, which is characterized in that the oscillator coil includes the oscillation of N number of parallel connection
Subcoil group, each oscillation subcoil group include the connected oscillation subcoil be connected in series of 2 Same Name of Ends.
8. system as claimed in any one of claims 1 to 6, which is characterized in that the oscillator coil includes N number of concatenated oscillation
Subcoil group, each oscillation subcoil group include the connected oscillation subcoil be connected in series of 2 Same Name of Ends.
9. a kind of wireless transmitter, including controller and transmitting coil, which is characterized in that further include as claim 1-8 is any
The system of detection metallic foreign body described in.
10. a kind of wireless power supply system, including wireless receiver, which is characterized in that including wireless hair as claimed in claim 9
Penetrate machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711328338.XA CN109917467A (en) | 2017-12-13 | 2017-12-13 | Detect system, wireless transmitter and the wireless power supply system of metallic foreign body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711328338.XA CN109917467A (en) | 2017-12-13 | 2017-12-13 | Detect system, wireless transmitter and the wireless power supply system of metallic foreign body |
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| CN109917467A true CN109917467A (en) | 2019-06-21 |
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| CN201711328338.XA Pending CN109917467A (en) | 2017-12-13 | 2017-12-13 | Detect system, wireless transmitter and the wireless power supply system of metallic foreign body |
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