CN211375081U - Foreign matter detection system - Google Patents
Foreign matter detection system Download PDFInfo
- Publication number
- CN211375081U CN211375081U CN202020011672.3U CN202020011672U CN211375081U CN 211375081 U CN211375081 U CN 211375081U CN 202020011672 U CN202020011672 U CN 202020011672U CN 211375081 U CN211375081 U CN 211375081U
- Authority
- CN
- China
- Prior art keywords
- detection
- coil
- detector
- foreign object
- detection coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a foreign matter detecting system, include: the device comprises a detection coil group, a switch module, a detector and a diagnostor; the switch module is provided with a plurality of input ports and a plurality of output ports, the input ports are respectively connected with the detection coil group and the diagnostor, and the output ports are communicated with the detector; the output port is communicated with each input port in sequence. The utility model discloses a foreign matter detecting system, a plurality of input ports have UNICOM respectively and have detected coil group and diagnotor, and before the work, input port UNICOM in proper order supplies the detector to detect to the detection of diagnotor is the benchmark, realizes the calibration to self.
Description
Technical Field
The utility model relates to a foreign matter detection area especially relates to foreign matter detecting system.
Background
The wireless charging technology of the electric automobile has the characteristics of safety, environmental protection, convenience and quickness in use and the like, and along with the gradual popularization of the technologies such as automatic parking, automatic driving, intelligent internet automobiles and the like, the wireless charging is widely regarded as an automatic charging mode with great advantages. However, when a metal foreign object appears above a transmitting coil of the wireless charging system, the metal foreign object generates heat due to an eddy current effect, which seriously affects transmission of system electric energy and may even cause a safety hazard due to a sharp rise in temperature. Therefore, the metal foreign object detection is an important protection function necessary for the wireless charging transmitting coil and the wireless charging technology.
In the prior art, for the detection of the foreign object, whether the foreign object exists is judged by detecting the power difference between the transmitting coil and the receiving coil, and the error of the method is large. And by arranging a plurality of detection coils, when foreign matters exist, the electric parameters of each coil, such as impedance, voltage and the like, are detected to determine whether the foreign matters exist and the positions of the foreign matters. This approach requires monitoring of each detection coil, and does not require a diagnostic procedure for the operation of the entire system, and does not guarantee the accuracy of each operation.
SUMMERY OF THE UTILITY MODEL
The utility model provides a foreign matter detecting system can diagnose self to ensure can normally carry out foreign matter detection work.
The utility model discloses a foreign matter detecting system, include: the device comprises a detection coil group, a switch module, a detector and a diagnostor; the switch module is provided with a plurality of input ports and a plurality of output ports, the input ports are respectively connected with the detection coil group and the diagnostor, and the output ports are communicated with the detector; the output port is communicated with each input port in sequence.
Preferably, the detection coil group has a plurality of detection coils; the diagnostor is a coil structure and is one of a plurality of coils; each coil is respectively communicated with different input ports.
Preferably, the detection coil group has a plurality of detection coils, and each of the coils is respectively communicated with different input ports; the number of input ports is at least 1 greater than the number of coils to connect the diagnostic coils.
Preferably, the detector is at least one of an impedance detector, a current detector and a voltage detector.
Preferably, at least one of the plurality of input ports has a priority port that communicates with the output port in preference to the other input ports.
Preferably, the diagnostic device is in communication with the priority port.
Preferably, the diagnostic means is a coil structure.
The utility model discloses a foreign matter detecting system, a plurality of input ports have UNICOM respectively and have detected coil group and diagnotor, and before the work, the input port UNICOM that connects with the diagnotor reaches the output port earlier, and the detector detects the diagnotor, and the detection data is in the predetermined range, then through the diagnosis, can carry out the work that follow-up foreign matter detected.
Drawings
FIG. 1 is a schematic view of an embodiment of the foreign object detection system of the present invention;
FIG. 2 is a schematic view of another embodiment of the foreign object detection system of the present invention;
FIG. 3 is a schematic structural view of the detection coil distribution in the foreign object detection system of the present invention;
FIG. 4 is a schematic view of another structure of the detection coil distribution in the foreign object detection system of the present invention;
FIG. 5 is a schematic view of a detection coil structure in the foreign object detection system of the present invention;
fig. 6 is the structure diagram of the detection coil structure foreign matter in the foreign matter detection system of the present invention.
Reference numerals:
the detection coil group 1, the switch module 2, the detector 3, the diagnostic device 4, the excitation coil 5, the detection coil 11, the input port 21, the output port 22, and the priority port 210.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.
The utility model discloses a foreign matter detection system, see fig. 1 and fig. 2, this foreign matter detection system includes detection coil group 1, switch module 2, detector 3 and diagnostor 4.
The switch module 2 has an input port 21 and an output port 22, the input port 21 has a plurality of ports respectively connected to the detection coil group 1 and the diagnostic device 4, and the output port 22 communicates with the detector 3. In operation, each input port 21 is in turn connected to an output port 22. Thus, the detector coil group 1 and the diagnostics device 4, which are connected to the input port 21, can be connected to the detector 3 in turn, so that the detector 3 can detect the electrical parameter. The electrical parameters detected are different according to different foreign object detection modes. The foreign matter detection method will be described later in this specification.
When calibration is required (generally, when the operation is started), the input port 21 connected with the diagnosis device 4 is communicated to the output port 22, the detector 3 detects the electrical parameter of the diagnosis device 4, and when the detection result of the electrical parameter is within a reasonable range, the detector 3 is considered to be normal to perform subsequent foreign matter detection operation. Otherwise, the working circuit or the detector 3 and the like are considered to be abnormal, and prompt information can be sent out.
In some embodiments, each input port 21 may be sequentially connected to the output port 22, electrical parameters of the detection coil group 1 and the diagnostor 4 are measured, and the detection result of each detection coil group 1 and the diagnostor 4 is within a reasonable range, so that the detector 3 is considered to be working normally, and meanwhile, the operation of each detection coil group 1 is also working normally. Otherwise, it can be considered that there is an abnormality in the detection coil group 1, and according to the sequence that the input port 21 communicates with the output port 22, it can be determined which coil group 1 has the abnormality.
Generally, the input port 21 to which the diagnostic device 4 is connected is first connected to the output port 22 to diagnose whether the detector 3 is normal, and when the detector 3 is normal, the input port 21 to which the detection coil groups 1 are connected is sequentially connected to the output port 22 to diagnose each detection coil group 1.
When the electric parameters of the detection coil group 1 and the electric parameters of the check coil 4 detected by the detector 3 are connected, the foreign matter detection and calibration system is in a state of accurate work within a reasonable range.
Generally, the detection coil set 1 has a plurality of detection coils 11, and the coils 11 are respectively communicated with different input ports 21, that is, one coil 11 is communicated with one input port 21, so as to form a one-to-one correspondence relationship. The number of input ports 21 is at least 1 greater than the number of coils 11, and one more input port 21 is used to connect the diagnostic 4.
The diagnostic device 4 is preferably in a coil structure, and in some embodiments, the diagnostic device 4 may be one of the detection coils 11, that is, in the detection coil group 1, one of the detection coils 11 is the diagnostic device 4 dedicated to diagnosis, and whether the diagnostic device 4 participates in the foreign object detection function of the detection coil 11 may be determined.
It is to be noted that one of the plurality of detection coils 11 is herein a preferred embodiment as the diagnostor 4. In a more general or preferred manner, the diagnostor 4 is independent of the detection coil 11. The detection coil 11 is generally in an operating position, i.e., a position where the foreign object needs to be detected, and the diagnostic device 4 is not necessarily in a position where the foreign object needs to be detected, and may be in a functional manner according to different operating modes. For example, when the detection coil 11 and the diagnostic device 4 are supplied with power by an independent power supply and the foreign matter is measured by detecting impedance, the diagnostic device may be supplied with power as long as the position where the operation is not affected. Although the diagnostor 4 may be independent of the detection coil 11, its structure is the same as or similar to that of the detection coil 11.
The detector 3 is at least one of an impedance detector, a current detector, and a voltage detector according to different foreign object detection methods.
At least one priority port 210 is provided in the plurality of input ports 21, and the priority port 210 communicates with the output port 22 in preference to the other input ports 21. Diagnostics 4 are in communication with priority port 210. That is, the diagnosis by the diagnosis device 4 is performed first by the detection device 3, and then if the embodiment of continuing the diagnosis of the detection coil 11 is adopted, the subsequent detection coil 11 is detected by the detection device 3 for the electrical parameter based on the result of the detection by the diagnosis device 4.
The diagnostic device 4 preferably has a coil structure and may be of exactly the same structure as the detection coil 11 and have the same electrical parameters, e.g. the same impedance. This enables the diagnosis to be performed more accurately. Note that the structure and electrical parameters of the diagnostic device 4 and the detection coil 11 are completely the same, so as to facilitate diagnosis, but in other embodiments, they may be different as long as the diagnostic device 4 has a certain electrical parameter, and the detector 3 detects the diagnostic device 4 having the certain electrical parameter, and as a result, the determined electrical parameter is within a reasonable range, and the diagnosis can be considered to be passed.
The diagnostic device 4 of the present application is not necessarily a coil structure, and other devices may be adopted as long as they have certain electrical parameters to ensure that, in operation, the detector 3 can be diagnosed as normal or not and each detection coil 11 can be diagnosed as normal or not according to the electrical parameters. When the coil structure is not adopted, the electrical parameters can still be selected to be the same as the electrical parameters of the detection coil 11. In addition, the diagnostic device 4 may also be an analog circuit or a signal simulator, which can simulate the corresponding electrical parameter characteristics to complete the subsequent diagnostic work, and thus the same is applicable to the present application. The above mentioned "the detection result is in a reasonable range", the reasonable range should be set according to different electrical characteristics and different requirements for detection precision, and the specific boundary of the range is adjusted according to actual conditions.
The following explains the operation principle of the foreign object detection device, mainly the operation principle of the detection coil group 1, and explains two preferable foreign object detection devices and their corresponding operation principles.
The first method comprises the following steps:
the detection coil 11 has a plurality of uniform arrays. The detection coil 11 can have two layers, wherein the dead zone of one layer of the detection coil 11 is in the working zone of the other layer of the detection coil 11, so that detection omission can be avoided.
As shown in fig. 3 and 4, in this relatively regular wiring manner (arrangement manner of the detection coils 11), there is a non-covered area, such as the detection coils 11 in a circular shape, between the adjacent detection coils 11, and thus the non-covered area is larger. This non-covered area, called the identification blind, is indicated by the arrow Z in the figure. For convenience of explanation, the detection coil 11 of one layer shown by a solid line in the drawing is referred to as a first layer coil, and the detection coil 11 shown by a broken line is referred to as a second layer coil. The blind area of the first layer coil is located within the coverage area of the second layer coil, i.e. within the identification area of the second layer coil. Thus, foreign matters enter the identification blind areas of the second layer coil and are also identified by the first layer coil. As can be understood from fig. 4 and 3, the detection coil 11 has a square, circular or other shape, and has blind areas at adjacent positions.
Generally, the detection coils 11 are wound, and due to the thickness (diameter) of the wire harness, a round angle is inevitably formed, as shown in fig. 4, even if the four corners of the square coil are curved, the signals of the detection coils 11 generate cross interference, a dead zone is formed in the boundary portion, and what is shown by an arrow Z in fig. 4 is the dead zone. Referring to fig. 3 and 4, there are a plurality of blind areas at the intersections of the plurality of detection coils 11 in one layer, and the blind areas are covered by the detection coils 11 (shown by broken lines in the drawings for distinction) in the other layer that is stacked. It should be noted that fig. 3 and 4 are only illustrative and are not intended to limit the shape, arrangement, number, and the like of the detection coils 11.
In operation, power is supplied to each detection coil 11 and when a foreign object enters the detection area, the foreign object causes the impedance of the detection coil 11 to change and thus be detected by the detector 3.
In some embodiments, as shown in fig. 5, the detection coil 11 is a balanced coil-two symmetrical parts are made by counter-winding a conductor. The number of the symmetrical parts can be 2 or 4, and generally an even number is adopted, so that the detection coil 11 is in a balanced state after being electrified, and foreign matters enter any one part, so that the balance is broken and the detection is carried out. In this manner, the detection coil 11 is directly supplied with power by an independent power supply.
And the second method comprises the following steps:
as shown in fig. 6, the detection coil 11 may also reuse the balance coil as shown in fig. 5. Besides, it is also possible to have an excitation coil 5, the excitation coil 5 is powered by a power supply, the excitation coil 5 is capable of emitting a detection magnetic field D, the detection coil 11 and the excitation coil 5 are arranged in an insulated manner, and the detection coil 11 is in the range of the detection magnetic field D. The exciting coil 5 generates electromagnetic induction with the detection coil 11 by detecting the magnetic field, so that an induced current (or voltage) is generated in the detection coil 11, and when a foreign object enters the range of the detection coil 11, the generated current and voltage are influenced, and when the foreign object is detected by the detector 3, the foreign object is judged to be present.
In either of the above two modes, the diagnostic device 4 can be made to have the same structure and the same (or similar) size as the detection coil 11. Generally, the detection coils 11 are identical to each other, so that the diagnostic accuracy can be ensured, and particularly in the embodiment in which each detection coil 11 is also diagnosed, it is more important to unify the detection coil 11 and the diagnostic 4.
The structure, features and effects of the present invention have been described in detail above according to the embodiment shown in the drawings, and the above description is only the preferred embodiment of the present invention, but the present invention is not limited to the implementation scope shown in the drawings, and all changes made according to the idea of the present invention or equivalent embodiments modified to the same changes should be considered within the protection scope of the present invention when not exceeding the spirit covered by the description and drawings.
Claims (7)
1. A foreign object detection system comprising: detection coil group (1), switch module (2), detector (3), its characterized in that still includes: a diagnotor (4); wherein the content of the first and second substances,
the switch module (2) is provided with an input port (21) and a plurality of output ports (22), the input port (21) is respectively connected with the detection coil group (1) and the diagnostor (4), and the output ports (22) are communicated with the detector (3);
each input port (21) is in turn connected to the output port (22).
2. The foreign object detection system according to claim 1,
the detection coil group (1) has a plurality of the detection coils (11); the diagnostor (4) is of a coil structure and is one of a plurality of coils (11);
each coil (11) is respectively communicated with different input ports (21).
3. The foreign object detection system according to claim 1,
the detection coil group (1) is provided with a plurality of detection coils (11), and each coil (11) is communicated with different input ports (21);
the number of input ports (21) is at least 1 greater than the number of coils (11) to connect the diagnostors (4).
4. The foreign object detection system according to claim 1,
the detector (3) is at least one of an impedance detector, a current detector and a voltage detector.
5. The foreign object detection system according to claim 1,
at least one priority port (210) of the plurality of input ports (21), the priority port (210) communicating with the output port (22) in preference to the other input ports (21).
6. The foreign object detection system according to claim 5,
the diagnotor (4) is in communication with the priority port (210).
7. The foreign object detection system according to any one of claims 1, 3 to 6,
the diagnostor (4) is of a coil structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020011672.3U CN211375081U (en) | 2020-01-04 | 2020-01-04 | Foreign matter detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020011672.3U CN211375081U (en) | 2020-01-04 | 2020-01-04 | Foreign matter detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211375081U true CN211375081U (en) | 2020-08-28 |
Family
ID=72155734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020011672.3U Active CN211375081U (en) | 2020-01-04 | 2020-01-04 | Foreign matter detection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211375081U (en) |
-
2020
- 2020-01-04 CN CN202020011672.3U patent/CN211375081U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102656467B (en) | There is the current sensor of self-test function | |
| EP2951790B1 (en) | Vehicle diagnostics apparatus and method | |
| US7505847B2 (en) | Configurable electronic control system and diagnostic method | |
| US20210033645A1 (en) | Device for detecting current leakage and current leakage detection system including the same | |
| CN102854372B (en) | High-voltage bus current detection device and battery management system | |
| CN103364204A (en) | Diagnostics for smart sensors of vehicles | |
| CN111579851B (en) | Buffer layer ablation current live detection system and method based on magnetic field effect | |
| CN205176650U (en) | Automatic diagnosis testing system of car | |
| CN211375081U (en) | Foreign matter detection system | |
| US20210063457A1 (en) | Method for monitoring a supply system of a motor vehicle | |
| CN104540704A (en) | Diagnostic apparatus for checking a control signal line | |
| CA2491108C (en) | Distance tolerant leadless current sensor | |
| CN111090119A (en) | Foreign matter detection system | |
| CN101788626B (en) | Method for distinguishing disconnection manner of displacement transducer LVDT | |
| KR101583957B1 (en) | Method for wiring mismatch detection of resolver | |
| KR101413429B1 (en) | Junction box and method of diagnosing the junction box | |
| US11342794B2 (en) | Inductive charging device and method for monitoring an inductive charging device | |
| CN110646076A (en) | Vehicle-mounted truck scale fault detection system | |
| CN114074574B (en) | Vehicle current acquisition method and device, control equipment and automobile | |
| CN210924235U (en) | Data control system | |
| KR20160134551A (en) | Method for monitoring an on-board electrical system | |
| CN103649861A (en) | Documentation of faults in a fault memory of a motor vehicle | |
| CN211148940U (en) | Wireless charging system and foreign matter detection equipment thereof | |
| CN107843365B (en) | System and method for measuring dynamic stress distribution of vehicle tire | |
| CN104459328B (en) | The method and apparatus for determining the method and apparatus of resistance value and manipulating operating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 230088 China (Anhui) pilot Free Trade Zone, Hefei, Anhui Province a3-15, 14 / F, block a, building J1, phase II, innovation industrial park, No. 2800, innovation Avenue, high tech Zone, Hefei Patentee after: Hefei Yougan Technology Co.,Ltd. Address before: 100085 room 412, block D, 9 Shangdi 3rd Street, Haidian District, Beijing Patentee before: BEIJING INVISPOWER TECHNOLOGY Co.,Ltd. |
|
| CP03 | Change of name, title or address |