CN209313537U - A kind of wireless charging system detection device of metal foreign body - Google Patents
A kind of wireless charging system detection device of metal foreign body Download PDFInfo
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- CN209313537U CN209313537U CN201920044226.XU CN201920044226U CN209313537U CN 209313537 U CN209313537 U CN 209313537U CN 201920044226 U CN201920044226 U CN 201920044226U CN 209313537 U CN209313537 U CN 209313537U
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- magnetorheological fluid
- foreign body
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- wireless charging
- detection device
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Abstract
The utility model discloses a kind of wireless charging system detection device of metal foreign body, belong to wireless charging field, it include: magnetorheological fluid detector, movement executing mechanism and signal picker, contain magnetorheological fluid materials in the magnetorheological fluid detector, the output end of the magnetorheological fluid detector connects the input terminal of the signal picker, the movement executing mechanism controls the magnetorheological fluid detector and moves horizontally along primary coil, the utility model is scanned primary coil before primary coil is to secondary coil charging by movement executing mechanism control magnetorheological fluid detector, it can observe that metallic foreign body whether there is in primary coil by signal picker, play the technical effect of metallic foreign body detection, the utility model structure is simple, detection sensitivity is high, it is low in cost.
Description
Technical field
The utility model relates to wireless charging field, especially a kind of wireless charging system detection device of metal foreign body.
Background technique
There is the following aspects in electric car induction type wireless charging system: first is that former secondary during the charging process
Magnetic field coupling region between the circle of sideline is not easy to be therefore easily perceived by humans when having foreign matter to enter；Second is that when have metallic foreign body (such as metal fragment,
Coin, pop can etc.) or organism foreign matter will affect former charging Distribution of Magnetic Field when there is coupling regime between former secondary coil,
To influence charge efficiency；Third is that the entrance of certain volume or the metallic foreign body of quantity can even make because of apparent power loss
Rise at the temperature of foreign matter, and then causes the serious consequences such as fire, device failure.
Utility model content
The utility model is intended to solve at least some of the technical problems in related technologies.For this purpose, this reality
It is to provide a kind of a kind of wireless charging system detection device of metal foreign body that can detecte metallic foreign body with a novel purpose.
The technical scheme adopted by the utility model is
A kind of wireless charging system detection device of metal foreign body, comprising: magnetorheological fluid detector, movement executing mechanism and letter
Number collector contains magnetorheological fluid materials, the output end connection of the magnetorheological fluid detector in the magnetorheological fluid detector
The input terminal of the signal picker, the movement executing mechanism control the magnetorheological fluid detector and move along primary coil level
It is dynamic.
Further, the movement executing mechanism includes motion controller, motor driver and motion actuators, the fortune
The output end of movement controller connects the input terminal of the motor driver, and the output end of the motor driver connects the movement
The output end of the input terminal of actuator, the motion actuators connects the magnetorheological fluid detector, controls the magnetorheological fluid
Detector is mobile.
Further, the signal picker includes signal acquisition module and signal comparison module, the signal acquisition mould
The input terminal of block connects the output end of the magnetorheological fluid detector, and the output end of the signal acquisition module connects the signal
The input terminal of comparator.
Further, the magnetorheological fluid detector further includes having covering, and magnetorheological fluid materials, institute are arranged in the covering
It states covering to be made of the elastic material that magnetic conductivity is zero, the both ends of the covering are provided with sheet metal.
Further, the signal acquisition module includes pressure sensor or voltage sensor.
Further, the wireless charging system detection device of metal foreign body further includes controller, the controller it is defeated
Enter end to connect with the output end of the output end of the movement executing mechanism and the signal picker respectively, the controller passes through
Switch is connect with the power supply of the primary coil.
Further, the wireless charging system detection device of metal foreign body further includes alarm, the alarm it is defeated
Enter end to connect with the output end of the controller.
The beneficial effects of the utility model are:
The utility model controls magnetorheological fluid detector by movement executing mechanism and charges in primary coil to secondary coil
It is preceding that primary coil is scanned, it can observe that metallic foreign body whether there is in primary coil by signal picker, play
The technical effect of metallic foreign body detection, the utility model structure is simple, and detection sensitivity is high, low in cost, can be widely applied to
Wireless charging field.
Detailed description of the invention
Fig. 1 is that a kind of structure of one specific embodiment of wireless charging system detection device of metal foreign body is former in the utility model
Reason figure；
Fig. 2 is that a kind of structure of one specific embodiment of wireless charging system detection device of metal foreign body is shown in the utility model
It is intended to；
Fig. 3 is magnetorheological in a kind of one specific embodiment of wireless charging system detection device of metal foreign body in the utility model
The structural schematic diagram of liquid detector；
Fig. 4 is foreign matter inspection in a kind of one specific embodiment of wireless charging system detection device of metal foreign body in the utility model
Survey Computing Principle schematic diagram.
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 wireless charging system detection device of metal foreign body one a kind of in the utility model specific implementations
The structure principle chart of example, comprising: magnetorheological fluid detector, movement executing mechanism and signal picker, the magnetorheological fluid detection
Contain magnetorheological fluid materials in device, the output end of the magnetorheological fluid detector connects the input terminal of the signal picker, institute
The movement executing mechanism control magnetorheological fluid detector is stated to move horizontally along primary coil.
Magnetorheological fluid is dispersed in the suspension formed in non magnetic oils by magnetic-particle, and such material is in zero magnetic field
Newtonian fluid is shown as, under magnetic fields, the particle of magnetorheological fluid becomes from unordered random distribution state along external magnetic field
The threadiness or column that direction is orderly distributed, the mobility of magnetorheological fluid materials change, and show as Bingham fluid characteristic, this
Kind variation is reversible, rapidly, suitable for current repeatedly efficient detection case.When magnetorheological fluid is transformed into glue from liquid
When state, the resistance value of material and shear stress can all occur significantly to change under two states, and can be with magnetic field strength
Change and change, therefore the resistance value of material or shear stress can be used as and survey parameter easily to reflect the Distribution of Magnetic Field of primary coil
This difficult measurement.
The utility model using magnetorheological fluid materials under external magnetic field electrology characteristic (magnetic field strength is bigger, wherein
Magnetorheological fluid materials resistance it is smaller, electric conductivity is stronger) and mechanical characteristic variation carry out foreign bodies detection.When metallic foreign body falls
When falling in primary coil, the variation of Distribution of Magnetic Field and magnetic field strength in primary coil can be caused, when magnetorheological fluid detector passes through
When crossing the field region, can sensitive magnetic reaction fields intensity variation, magnetic be can determine whether out by the variation of the numerical value of signal picker
There are metallic foreign bodies in rheology liquid detector.
Specifically, movement executing mechanism includes motion controller, motor driver and motion actuators, the motion control
The output end of device connects the input terminal of the motor driver, and the output end of the motor driver connects the motion actuators
Input terminal, the output ends of the motion actuators connects the magnetorheological fluid detector, as shown in Fig. 2, magnetorheological fluid detects
Device 1 moves under the execution of movement mechanism along primary coil 2, wherein 3 be the direction of the magnetic line of force, 4 be secondary coil.
Motion controller controls the fixed magnetorheological fluid detector of motor driver control motion actuators and transports along assigned direction
It is dynamic.
Specifically, as shown in figure 3, magnetorheological fluid detector is formed by being wrapped in magnetorheological fluid elastic material 6 in covering 5,
Covering is made of the elastic material that magnetic conductivity is zero, and the both ends of the covering are provided with sheet metal, and signal acquisition module passes through gold
Belong to piece to contact with magnetorheological fluid detector.
As shown in Figure 1, the signal picker includes signal acquisition module, signal amplification module and signal comparison module,
The input terminal of the signal acquisition module connects the output end of the magnetorheological fluid detector, the output of the signal acquisition module
End connects the input terminal of the signal amplification module, and the output end of the signal amplification module connects the signal comparison module
Input terminal.
Signal picker is used to extract the output voltage at magnetorheological fluid detector both ends, and signal amplification module will be for that will export
Voltage amplifies, and signal comparison module is used for collected real-time voltage and the magnetorheological fluid spy when metallic foreign body is not present
The output voltage for surveying device both ends is compared, if the changing value of voltage is greater than preset value, proves that magnetorheological fluid detector is current
There are metallic foreign bodies in region.
Changes will occur for electric property and mechanical property in changing magnetic field for magnetorheological fluid, so correspondingly, signal
Acquisition module includes pressure sensor or voltage sensor.
It further include controller in the present embodiment, the output with the movement executing mechanism respectively of the input terminal of the controller
End is connected with the output end of the signal picker, and the controller is connect by switch with the power supply of the primary coil.
It further include alarm in the present embodiment, the input terminal of the alarm is connect with the output end of the controller.
When being tested with metallic foreign body, the dump of primary coil, alarm are sent alarm by controller.
Circular is as follows: as shown in figure 4, along magnetorheological fluid detector motion direction by the primary coil
It is divided into N number of predeterminable area, wherein N=b/a, b is magnetorheological fluid detector motion direction primary coil length, and a is magnetic
Flux detector cladding layer width；
When recording the magnetorheological fluid detector motion to the predeterminable area, the voltage value of signal picker output is described
Voltage value is preset value of the magnetorheological fluid detector in the predeterminable area.
As shown in table 1, detector is a in the relative position of primary coil1、a2、a3、…、an, corresponding magnetic field strength point
It Wei not H1、H2、H3、…、Hn, according to magnetorheological fluid materials in the certain situation of applied field strengths, corresponding resistance value or shearing
Stress is certain, then output voltage values of the magnetorheological fluid detector in signal picker are respectively u1、u2、u3、…、un, will be above-mentioned
Voltage value is as the foundation for determining whether foreign matter；When actually detected, it is assumed that the output of magnetorheological fluid detector at various locations
Voltage value respectively corresponds u'1、u'2、u'3、…、u'n, then can be according to voltage difference | u'i-ui| the size of (i=1,2 ..., n) is sentenced
Reading has foreign: if | u'i-ui| < Δ ui (Δ ui is preset voltage difference threshold value, i=1,2 ..., n) then shows that there is no different
Object, conversely, then showing with the presence of foreign matter.
Table 1
It is to be illustrated to the preferable implementation of the utility model, but the invention is not limited to the reality above
Example is applied, those skilled in the art can also make various equivalent variations without departing from the spirit of the present invention
Or replacement, these equivalent deformations or replacement are all included in the scope defined by the claims of the present application.
Claims (7)
1. a kind of wireless charging system detection device of metal foreign body characterized by comprising magnetorheological fluid detector, movement are held
Row mechanism and signal picker contain magnetorheological fluid materials in the magnetorheological fluid detector, the magnetorheological fluid detector
Output end connects the input terminal of the signal picker, and the movement executing mechanism controls the magnetorheological fluid detector along primary side
Previous level is mobile.
2. a kind of wireless charging system detection device of metal foreign body according to claim 1, which is characterized in that the movement
Executing agency includes motion controller, motor driver and motion actuators, described in the output end connection of the motion controller
The input terminal of motor driver, the output end of the motor driver connect the input terminal of the motion actuators, the movement
The output end of actuator connects the magnetorheological fluid detector, and it is mobile to control the magnetorheological fluid detector.
3. a kind of wireless charging system detection device of metal foreign body according to claim 1, which is characterized in that the signal
Collector includes signal acquisition module, signal amplification module and signal comparison module, and the input terminal of the signal acquisition module connects
The output end of the magnetorheological fluid detector is connect, the output end of the signal acquisition module connects the defeated of the signal amplification module
Enter end, the output end of the signal amplification module connects the input terminal of the signal comparison module.
4. a kind of wireless charging system detection device of metal foreign body according to claim 1, which is characterized in that the magnetic current
Becoming liquid detector further includes having covering, and magnetorheological fluid materials, the elasticity that the covering is zero by magnetic conductivity are arranged in the covering
Material is constituted, and the both ends of the covering are provided with sheet metal.
5. a kind of wireless charging system detection device of metal foreign body according to claim 3, which is characterized in that the signal
Acquisition module includes pressure sensor or voltage sensor.
6. a kind of wireless charging system detection device of metal foreign body according to claim 1-5 further includes control
Device, the input terminal of the controller connect with the output end of the output end of the movement executing mechanism and the signal picker respectively
It connects, the controller is connect by switch with the power supply of the primary coil.
7. a kind of wireless charging system detection device of metal foreign body according to claim 6, further includes alarm, the report
The input terminal of alert device is connect with the output end of the controller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920044226.XU CN209313537U (en) | 2019-01-10 | 2019-01-10 | A kind of wireless charging system detection device of metal foreign body |
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| CN201920044226.XU CN209313537U (en) | 2019-01-10 | 2019-01-10 | A kind of wireless charging system detection device of metal foreign body |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109638987A (en) * | 2019-01-10 | 2019-04-16 | 深圳大学 | A kind of wireless charging system detection device of metal foreign body and method |
| CN112128825A (en) * | 2020-09-25 | 2020-12-25 | 山东大学 | Smoke machine-gas stove integrated intelligent system and method based on wireless power supply |
-
2019
- 2019-01-10 CN CN201920044226.XU patent/CN209313537U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109638987A (en) * | 2019-01-10 | 2019-04-16 | 深圳大学 | A kind of wireless charging system detection device of metal foreign body and method |
| CN112128825A (en) * | 2020-09-25 | 2020-12-25 | 山东大学 | Smoke machine-gas stove integrated intelligent system and method based on wireless power supply |
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