CN110860489B - Foreign matter detection and classification device and detection and classification method thereof in wireless power supply technology - Google Patents
Foreign matter detection and classification device and detection and classification method thereof in wireless power supply technology Download PDFInfo
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- CN110860489B CN110860489B CN201911300128.9A CN201911300128A CN110860489B CN 110860489 B CN110860489 B CN 110860489B CN 201911300128 A CN201911300128 A CN 201911300128A CN 110860489 B CN110860489 B CN 110860489B
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- 238000001514 detection method Methods 0.000 title claims abstract description 97
- 238000005516 engineering process Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims description 16
- 229910052751 metal Inorganic materials 0.000 claims abstract description 23
- 239000002184 metal Substances 0.000 claims abstract description 23
- 230000005540 biological transmission Effects 0.000 claims description 20
- 230000002787 reinforcement Effects 0.000 claims description 12
- 238000004891 communication Methods 0.000 abstract description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- -1 coins Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
- B07C5/344—Sorting according to other particular properties according to electric or electromagnetic properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/36—Sorting apparatus characterised by the means used for distribution
- B07C5/361—Processing or control devices therefor, e.g. escort memory
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/60—Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
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- Power Engineering (AREA)
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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The utility model provides a wireless power supply technology foreign matter detection and sorter, including frequency detection device, current detection device and foreign matter processing device, this frequency detection device and this current detection device all are connected with this foreign matter processing device with wired or wireless mode communication, wherein this frequency detection device includes frequency emission device, frequency receiving device and frequency judgement device, this frequency judgement device judges the initial frequency that this frequency emission device was launched and the central target value center frequency that this frequency receiving device received, wherein this frequency judgement device is preset with the frequency fluctuation interval, when this frequency judgement device judges that the numerical value of two frequencies is different and surpassed the frequency fluctuation interval of predetermineeing, then the detected object is the metal of non-coil, this frequency judgement device sends foreign matter information and gives this foreign matter processing device, this foreign matter processing device starts the warning and close wireless power supply unit after receiving foreign matter information, stop the power supply.
Description
Technical Field
The invention relates to the field of wireless power supply, in particular to a device and a method for detecting and classifying foreign matters in the wireless power supply technology.
Background
The wireless power supply technology refers to a power transmission mode through non-physical contact. The wireless power supply technology is derived from a wireless power transmission technology and can be divided into a low-power wireless charging mode and a high-power wireless charging mode.
Because the charger and the electricity utilization device transmit energy by using a magnetic field, the charger and the electricity utilization device are not connected by using wires, and therefore, the charger and the electricity utilization device can be exposed without conductive contacts.
In the energy transmission process of the wireless power supply technology, if foreign matters exist in a transmission path, the transmission efficiency of electric energy can be affected, and other adverse conditions such as wireless power supply, short circuit and the like can not be carried out even. And different foreign materials may cause different problems. For example, if a non-coil metal exists in the transmission path, and the wireless power supply contacts the non-coil pair metal, fire is easy to occur, and eddy current is generated when the non-coil pair metal contacts, and heat is generated. Excessive heating will result in a high power output, similar to a short circuit. Therefore, the necessity of detecting the metal of the non-coil is particularly important. For another example, if other nonmetallic foreign matter exists in the transmission path, the transmission efficiency of the electric energy may be affected.
Therefore, it is important to detect foreign matters in the wireless power supply technology, and it is also important to classify the detected foreign matters so as to cope with them in different ways.
Disclosure of Invention
The invention aims to provide a foreign matter detection and classification device and method for a wireless power supply technology, which can detect foreign matters in the range of a wireless power supply transmission path, classify the foreign matters and adopt different treatment modes based on different foreign matter types so as to ensure the normal work of wireless power supply.
The invention further aims to provide a foreign matter detection and classification device and method for the wireless power supply technology, which can classify non-coil foreign matter detection, ensure normal operation of wireless power supply equipment and ensure power generation efficiency and safe service life of wireless power supply.
The invention further aims to provide a foreign matter detection and classification device and method for the wireless power supply technology, which can combine frequency detection and current detection to classify the same non-coil metal foreign matter detection of a frequency result and a coil, improve the accuracy of detection classification and ensure the normal work of wireless power supply.
In order to achieve at least one of the above objects, the present invention provides a wireless power supply technology foreign matter detection and classification apparatus, which includes a frequency detection device, a current detection device, and a foreign matter treatment device, both of which are connected in wired or wireless communication with the foreign matter treatment device, wherein the frequency detection device includes a frequency emission device, a frequency reception device, and a frequency judgment device that judges an initial frequency emitted by the frequency emission device and a center target value center frequency received by the frequency reception device, wherein the frequency judgment device is preset with a frequency fluctuation interval, and when the frequency judgment device judges that the values of the two frequencies are different and exceed the preset frequency fluctuation interval, the detected object is a non-coil metal, the frequency judgment device sends foreign matter information to the foreign matter treatment device, and the foreign matter processor starts an alarm and turns off the wireless power supply device after receiving the foreign matter information, and stops power supply.
In some embodiments, wherein the frequency judging means judges that the two frequencies are judged to be different and the difference is within a preset frequency fluctuation period, or the two frequencies are judged to be the same, the frequency judging means sends judgment result information to the foreign matter processing means, the foreign matter processing means sends reinforcement detection information to the current detecting means, and the current detecting means performs reinforcement detection.
In some embodiments, the current detecting device includes an eddy current detecting device and a current judging device, the eddy current detecting device detects an eddy current value of the detected object after receiving the enhanced detection information sent by the foreign object processing device, and sends the detected eddy current value to the current judging device, the current judging device presets a normal operation current value and a normal operation current value fluctuation interval value, if the current judging device judges that the eddy current value sent by the eddy current detecting device is not the preset normal operation current value or the normal operation current value fluctuation interval value, indicating that the foreign object is a non-coil foreign object, then sending foreign object information to the foreign object processing device, and the foreign object processing device turns off the wireless power supply device and gives an alarm.
In some embodiments, if the current judging device judges that the eddy current value sent by the eddy current detecting device is a preset normal working current value or a normal working current value fluctuation interval value, the instruction is a normal coil, the current judging device sends normal coil information to the foreign matter processing device, and the foreign matter processing device does not operate the wireless power supply device and displays a normal wireless power supply state.
In some embodiments, the initial frequency emitted by the frequency emitting device is 125khz.
According to another aspect of the present invention, there is also provided a wireless power supply technology foreign matter detection and classification method including the steps of:
the transmitting end transmits the initial frequency;
detecting the center frequency of the center target value of the receiving end;
judging whether the initial frequency of the emission and the center frequency of the received center target value are the same or not;
if the two frequencies are judged to be different and the difference value exceeds a preset frequency fluctuation interval, foreign matter information and warning information are fed back, and the wireless power supply device is stopped to supply power;
if the two frequencies are judged to be different and the difference is within a preset frequency fluctuation period, or if the two frequencies are judged to be the same, performing current boost detection;
detecting an eddy current value of the object to be detected;
judging whether the detected eddy current value and the preset normal working current value are the same or not;
if the detected eddy current value is the same as the preset normal working current value, feeding back non-foreign matter information, and enabling the wireless power supply device to work normally;
if the detected eddy current value is different from the preset normal working current value, judging whether the difference value of the eddy current value and the normal working current value is in the preset normal working current value fluctuation interval value range or not;
if the difference value of the eddy current value and the normal working current value is judged to be in the preset value range of the fluctuation interval of the normal working current value, feeding back non-foreign matter information, and enabling the wireless power supply device to work normally; and
if the difference value between the eddy current value and the normal working current value is judged not to be in the preset normal working current value fluctuation interval value range, foreign matter information and warning information are fed back, and the wireless power supply device is stopped to supply power.
In some embodiments, the judging device judges the initial frequency transmitted by the frequency transmitting device and the center frequency of the center target value received by the frequency receiving device, wherein the frequency judging device is preset with a frequency fluctuation interval, when the frequency judging device judges that the values of the two frequencies are different and exceed the preset frequency fluctuation interval, the detected object is non-coil metal, the frequency judging device sends foreign matter information to the foreign matter processing device, and the foreign matter processing device starts an alarm and turns off the wireless power supply device after receiving the foreign matter information to stop power supply.
In some embodiments, wherein the frequency judging means judges that the two frequencies are judged to be different and the difference is within a preset frequency fluctuation period, or the two frequencies are judged to be the same, the frequency judging means sends judgment result information to the foreign matter processing means, the foreign matter processing means sends reinforcement detection information to the current detecting means, and the current detecting means performs reinforcement detection.
In some embodiments, the current detecting device includes an eddy current detecting device and a current judging device, the eddy current detecting device detects an eddy current value of the detected object after receiving the enhanced detection information sent by the foreign object processing device, and sends the detected eddy current value to the current judging device, the current judging device presets a normal operation current value and a normal operation current value fluctuation interval value, if the current judging device judges that the eddy current value sent by the eddy current detecting device is not the preset normal operation current value or the normal operation current value fluctuation interval value, indicating a foreign object which is not a coil, then sending foreign object information to the foreign object processing device, and the foreign object processing device turns off the wireless power supply device and gives an alarm.
In some embodiments, if the current judging device judges that the eddy current value sent by the eddy current detecting device is a preset normal working current value or a normal working current value fluctuation interval value, the instruction is a normal coil, the current judging device sends normal coil information to the foreign matter processing device, and the foreign matter processing device does not operate the wireless power supply device and displays a normal wireless power supply state.
Drawings
Fig. 1 is a schematic diagram showing the constitution of a foreign matter detection and classification device for wireless power supply technology according to a preferred embodiment of the present invention.
Fig. 2 is a schematic diagram illustrating steps of a wireless power technology foreign object detection and classification method according to a preferred embodiment of the present invention.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present invention.
It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.
Fig. 1 shows a foreign object detection and classification device based on a wireless power supply technology according to a preferred embodiment of the present invention. The foreign matter detection and classification device for the wireless power supply technology can detect foreign matters in the range of the wireless power supply transmission path, classify the foreign matters and adopt different treatment modes based on different foreign matter types so as to ensure the normal work of wireless power supply.
In the present invention, the foreign matter refers to a non-coil substance, for example, a non-coil metal, another non-coil substance, and the like. The invalid power supply foreign matter detection and classification device classifies the non-coil foreign matter detection, ensures the normal operation of wireless power supply equipment, and ensures the power generation efficiency and the safe service life of wireless power supply.
Specifically, the wireless power supply technology foreign matter detection and classification apparatus of the present invention includes a frequency detection device 100, a current detection device 200, and a foreign matter treatment device 300. The frequency detecting device 100 and the current detecting device 200 are both communicatively connected to the foreign matter processing device 300 in a wired or wireless manner. The frequency detection device 100 detects the frequency of the detected object in the range of the wireless power supply transmission path, the current detection device 200 performs enhanced detection classification on the detected object by detecting the eddy current of the detected object, and the foreign matter processing device 300 performs processing according to different classifications of detected foreign matters, so that the normal operation of wireless power supply is ensured.
Further, the frequency detection device 100 further includes a frequency transmitting device 110, a frequency receiving device 120, and a frequency judging device 130. The frequency transmitting device 110 transmits an initial frequency, for example, a frequency having a value of 125khz, and the frequency receiving device 120 detects a center target value center frequency of the object to be detected in the wireless transmission path.
The frequency judging device 130 judges the initial frequency transmitted by the frequency transmitting device 110 and the center frequency of the center target value received by the frequency receiving device 120, and the frequency judging device 130 is preset with a frequency fluctuation interval. When the frequency judging device 130 judges that the two frequencies have different values and exceed the preset frequency fluctuation interval, the detected object is non-coil metal, the frequency judging device 130 sends foreign matter information to the foreign matter processing device 300, and the foreign matter processing device 300 starts an alarm and closes a wireless power supply device after receiving the foreign matter information to stop power supply.
In a more specific embodiment, the initial frequency emitted by the frequency emitting device 110 is 125khz, the frequency judging device 130 is preset with a frequency fluctuation interval of 5khz, the frequency receiving device 120 detects that the center target value center frequency of the detected object in the wireless transmission path is 140khz or 110khz, the frequency judging device frequency 130 judges that the actual frequency fluctuation interval is 15khz and exceeds the preset frequency fluctuation interval, the frequency judging device 130 judges that the detected object is a non-coil metal and sends foreign object information to the foreign object processing device 300, the foreign object processing device 300 immediately lights a red lamp to give an alarm, and the wireless power supply device is turned off in time, so that the energy loss caused by the non-metal is avoided, the electric quantity is saved, and the danger caused by the contact with the non-coil metal can be avoided. Because wireless power supply is easy to fire if contacting metal, eddy current is generated when contacting, heating is generated, high power output is realized when the heating is overlarge, the transmission efficiency is affected similarly to a short circuit, and the service life of the wireless power supply device is greatly shortened.
If the frequency determining device 130 determines that the values of the two frequencies are the same, for example, 125khz, the result information of the same frequency value is sent to the foreign object handling device 300, and after the foreign object handling device 300 receives the result information of the same frequency value, the reinforcing detection information is sent to the current detecting device 200. If the frequency determining device 130 determines that the difference between the two frequencies is within the preset frequency fluctuation range, for example, the difference value is 3khz, the result information of the frequency difference value within the frequency fluctuation range is sent to the foreign object processing device 300, and after the foreign object processing device 300 receives the result information of the same frequency value, the foreign object processing device sends the reinforcement detection information to the current detecting device 200. The current detection device 200 performs enhanced detection on the detected object by detecting the eddy current of the detected object, so that the detection accuracy is improved, and the damage to the wireless power supply device caused by other non-coil metals with the same frequency value as the coil is avoided.
Further, the current detecting device 200 includes an eddy current detecting device 210 and a current judging device 220. The eddy current detecting device 210 detects an eddy current value of the object to be detected after receiving the reinforcement detection information sent from the foreign matter handling device 300, and sends the detected eddy current value to the current judging device 220. The current determination device 220 is preset with a normal operation current value and a normal operation current value fluctuation interval value, if the current determination device 220 determines that the eddy current value sent by the eddy current detection device 210 is not the preset normal operation current value or the normal operation current value fluctuation interval value, indicating a foreign object that is a non-coil, then sending foreign object information to the foreign object processing device 300, and the foreign object processing device 300 turns off a wireless power supply device and gives an alarm. If the current determination device 220 determines that the eddy current value sent by the eddy current detection device 210 is a preset normal operation current value or a normal operation current value fluctuation interval value, which indicates a normal coil, the current determination device 220 sends normal coil information to the foreign object processing device 300, and the foreign object processing device 300 does not operate the wireless power supply device, and displays a normal wireless power supply state, such as a green light display.
In some more specific embodiments, for example, the current determination device 220 is preset with a normal operating current value of 200 milliamperes, and a normal operating current value fluctuation interval value of 199 milliamperes to 201 milliamperes. When the judging device 130 judges that the two frequencies are equal in value and are 125khz, the judging device 130 sends result information with the frequency values of 125khz to the foreign matter processing device 300, and after the foreign matter processing device 300 receives the result information with the frequency values of 125khz, the foreign matter processing device 300 sends reinforcing detection information to the eddy current detecting device 210 of the current detecting device 200, and the eddy current detecting device 210 detects an eddy current value, and if the current judging device 220 judges that the detected eddy current value is 200 milliamperes or is in a range of 199 milliamperes to 201 milliamperes in a normal working current value fluctuation interval, the coil is indicated. The current judging device 220 sends coil information to the foreign object handling device 300, and the wireless power supply device continuously works normally and lights a green light. However, if the current determination means 220 determines that the detected eddy current value is not 200 milliamperes and is not in the range of 199 milliamperes to 201 milliamperes, which is a range of the normal operation current value fluctuation interval value, the current determination means 220 sends foreign matter information to the foreign matter processing means 300, and the foreign matter processing means 300 turns off the wireless power supply device, alarms, and lights a red light, indicating that the detected object is a non-coil metal, such as an aluminum alloy, a stainless steel, a coin, a copper wire, or the like.
The need for enhanced detection with current is due to the fact that two phenomena of one result, which is the same as the coil frequency, are generated when a metal such as aluminum alloy is encountered, and the current phenomena of the aluminum alloy and the coil are different, so that the enhanced detection structure and method for detecting current can be used for enhanced detection and classification of metal foreign matters which possibly generate two phenomena of one result, and the accuracy of the foreign matter detection and classification of the invention is improved. In some embodiments, for example, the object to be detected is an aluminum alloy, and when 125khz is emitted, the receiving end is 125khz resonant, two phenomena of this result are: one is to increase the power output, the current energy is converted into electromagnetic energy, resonance generates resonance wave, through the air propagation past, when resonance starts, the current can be increased to form abrupt change, the current can be greatly converted into electromagnetic energy, and the electromagnetic energy is converted into a receiving end, namely a target coil, when the receiving end contacts the target coil, the receiving end becomes 125khz, and the parameters also become 125khz due to environmental changes. However, there are metals such as aluminum alloys that are just 125khz, and the conductivity and eddy currents generated are copper > stainless steel > aluminum alloys that may be generated at the same frequency as normal coils and that are not effective by frequency-wise detection alone. It is necessary to detect such foreign substances of the aluminum alloy by means of a strong detection of the current. The current is combined to judge simultaneously. When contacting such metals as aluminum alloys, eddy currents are generated, the current flow is very large, while the eddy currents generated by copper and stainless steel are very large. If copper and stainless steel, such as coins, copper wires, etc., are small, the eddy currents generated by such metals, such as coins, are also small. The eddy currents are much more current than the operating current. It can be judged as metal. The aluminum alloy is a combination of two detection modes of frequency and current, the frequency is not a target frequency value, and the current is large. 200 milliamps is the normal operating current is a fixed value that is operating normally, such as 200 milliamps. Even metallic foreign matter of a small size such as aluminum alloy can be detected.
It will be appreciated by those skilled in the art that the various values and ranges of values described above are merely examples, and the invention is not limited in this respect.
As shown in fig. 2, according to another aspect of the present invention, there is also provided a wireless power supply technology foreign matter detection and classification method including the steps of:
s1010: the transmitting end transmits the initial frequency;
s1020: detecting the center frequency of the center target value of the receiving end;
s1030: judging whether the initial frequency of the emission and the center frequency of the received center target value are the same or not;
s1040: if the two frequencies are judged to be different and the difference value exceeds a preset frequency fluctuation interval, foreign matter information and warning information are fed back, and the wireless power supply device is stopped to supply power;
s1050: if the two frequencies are judged to be different and the difference is within a preset frequency fluctuation period, or if the two frequencies are judged to be the same, performing current boost detection;
s1060: detecting an eddy current value of the object to be detected;
s1070: judging whether the detected eddy current value and the preset normal working current value are the same or not;
s1080: if the detected eddy current value is the same as the preset normal working current value, feeding back non-foreign matter information, and enabling the wireless power supply device to work normally;
s1090: if the detected eddy current value is different from the preset normal working current value, judging whether the difference value of the eddy current value and the normal working current value is in the preset normal working current value fluctuation interval value range or not;
s1100: if the difference value of the eddy current value and the normal working current value is judged to be in the preset value range of the fluctuation interval of the normal working current value, feeding back non-foreign matter information, and enabling the wireless power supply device to work normally;
s1110: if the difference value between the eddy current value and the normal working current value is judged not to be in the preset normal working current value fluctuation interval value range, foreign matter information and warning information are fed back, and the wireless power supply device is stopped to supply power.
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are by way of example only and are not limiting. The objects of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been shown and described in the examples and embodiments of the invention may be modified or practiced without departing from the principles described.
Claims (6)
1. A wireless power supply technology foreign matter detection and classification apparatus characterized in that the wireless power supply technology foreign matter detection and classification apparatus includes a frequency detection device, a current detection device, and a foreign matter processing device, the frequency detection device and the current detection device are both connected in a wired or wireless manner with the foreign matter processing device, the frequency detection device detects a frequency of a detected object in a wireless power supply transmission path range, the current detection device performs reinforcement detection classification by detecting eddy current of the detected object, the foreign matter processing device performs processing according to different classifications of detected foreign matter, wherein the frequency detection device includes a frequency transmission device, a frequency reception device, and a frequency judgment device that judges an initial frequency transmitted by the frequency transmission device and a center target value center frequency received by the frequency reception device, wherein the frequency judgment device is preset with a frequency fluctuation section, when the frequency judgment device judges that a value of two frequencies is different and exceeds the preset frequency fluctuation section, the detected object is a metal of a non-coil, the frequency judgment device transmits information to the detected object by detecting eddy current of the detected object, the foreign matter processing device performs processing according to different classifications of detected foreign matter, wherein the frequency judgment device judges that the frequency transmission device transmits the initial frequency transmitted by the frequency transmission device and the frequency reception device receives the center target value center frequency in the frequency, the frequency judgment device is a frequency fluctuation section, when the frequency judgment device judges that the two frequency is different from the foreign matter processing device is judged to be powered by the foreign matter processing device, and the foreign matter processing device is turned off, the foreign matter processing device is judged to have been judged that the same when the power supply device is judged that the two detected by the foreign matter processing device is turned off, the current detection device performs reinforcement detection, wherein the current detection device comprises an eddy current detection device and a current judgment device, the eddy current detection device detects an eddy current value of a detected object after receiving reinforcement detection information sent by the foreign object processing device, and sends the detected eddy current value to the current judgment device, the current judgment device presets a normal operation current value and a normal operation current value fluctuation interval value, if the current judgment device judges that the eddy current value sent by the eddy current detection device is not the preset normal operation current value or the normal operation current value fluctuation interval value, the foreign object processing device sends foreign object information to the foreign object processing device, the foreign object processing device closes a wireless power supply device and alarms, wherein if the current judgment device judges that the current value sent by the eddy current detection device is the preset normal operation current value or the normal operation current value fluctuation interval value, the current judgment device sends normal coil information to the foreign object processing device, the foreign object processing device does not display an initial power supply state, and the foreign object processing device sends a wireless power supply state to the foreign object processing device at a frequency of 125 hz.
2. A wireless power supply technology foreign matter detection and classification method employing the wireless power supply technology foreign matter detection and classification apparatus according to claim 1, characterized in that the wireless power supply technology foreign matter detection and classification method comprises the steps of:
the frequency transmitting device transmits an initial frequency;
detecting a center target value center frequency received by a frequency receiving device;
the frequency judging device judges whether the initial frequency of the emission and the center frequency of the received center target value are the same;
if the two frequencies are judged to be different and the difference value exceeds a preset frequency fluctuation interval, foreign matter information and warning information are fed back, and the wireless power supply device is stopped to supply power;
if the two frequencies are judged to be different and the difference is within a preset frequency fluctuation period, or if the two frequencies are judged to be the same, performing current boost detection;
the current detection device detects the eddy current value of the detected object;
the current judging device judges whether the detected eddy current value and the preset normal working current value are the same;
if the detected eddy current value is the same as the preset normal working current value, feeding back non-foreign matter information, and enabling the wireless power supply device to work normally;
if the detected eddy current value is different from the preset normal working current value, judging whether the difference value of the eddy current value and the normal working current value is in the preset normal working current value fluctuation interval value range or not;
if the difference value of the eddy current value and the normal working current value is judged to be in the preset value range of the fluctuation interval of the normal working current value, feeding back non-foreign matter information, and enabling the wireless power supply device to work normally; and
if the difference value between the eddy current value and the normal working current value is judged not to be in the preset normal working current value fluctuation interval value range, foreign matter information and warning information are fed back, and the wireless power supply device is stopped to supply power.
3. The foreign matter detection and classification method according to claim 2, wherein the frequency judgment means judges an initial frequency transmitted by the frequency transmission means and a center frequency of the center target value received by the frequency reception means, wherein the frequency judgment means is preset with a frequency fluctuation section, when the frequency judgment means judges that the two frequencies are different in value and exceed the preset frequency fluctuation section, the detected object is a metal other than a coil, the frequency judgment means transmits foreign matter information to the foreign matter processing means, and the foreign matter processing means starts an alarm and turns off the wireless power supply device after receiving the foreign matter information, and stops power supply.
4. The wireless power supply technology foreign matter detection and classification method according to claim 3, wherein the frequency judgment means judges that two frequencies are judged to be different and the difference is within a preset frequency fluctuation period, or that two frequencies are judged to be the same, the frequency judgment means sends judgment result information to the foreign matter processing means, the foreign matter processing means sends reinforcement detection information to the current detection means, and the current detection means performs reinforcement detection.
5. The foreign matter detection and classification method according to claim 4, wherein the current detection device includes an eddy current detection device for detecting an eddy current value of the object to be detected after receiving the reinforcement detection information transmitted from the foreign matter treatment device, and transmitting the detected eddy current value to the current judgment device, the current judgment device being preset with a normal operation current value and a normal operation current value fluctuation interval value, and if the current judgment device judges that the eddy current value transmitted from the eddy current detection device is not the preset normal operation current value or the normal operation current value fluctuation interval value, indicating a foreign matter which is a non-coil, transmitting the foreign matter information to the foreign matter treatment device, and the foreign matter treatment device turning off the wireless power supply device and giving an alarm.
6. The foreign object detection and classification method according to claim 5, wherein if the current judgment means judges that the eddy current value transmitted by the eddy current detection means is a preset normal operation current value or a normal operation current value fluctuation interval value, the specification is a normal coil, the current judgment means transmits normal coil information to the foreign object processing means, and the foreign object processing means does not operate the wireless power supply device, displaying a normal wireless power supply state.
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