CN107800173B - Wireless charger and information prompting method - Google Patents
Wireless charger and information prompting method Download PDFInfo
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- CN107800173B CN107800173B CN201711165403.1A CN201711165403A CN107800173B CN 107800173 B CN107800173 B CN 107800173B CN 201711165403 A CN201711165403 A CN 201711165403A CN 107800173 B CN107800173 B CN 107800173B
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/13—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using electromagnetic driving means
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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
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
The embodiment of the invention discloses a wireless charger and an information prompting method, wherein the wireless charger comprises the following components: the wireless transmitting device comprises a transmitting signal generating module and a wireless transmitting coil, wherein at least one magnet is arranged at the periphery and/or the center of the wireless transmitting coil and used for forming a constant magnetic field around the wireless transmitting coil; and the transmitting signal generating module is connected with the wireless transmitting coil and is used for generating a combined transmitting signal and transmitting the combined transmitting signal to the wireless transmitting coil, wherein the combined transmitting signal comprises a target signal with a signal frequency range within the range of human ear hearing. The embodiment of the invention solves the problem that the existing wireless charger can carry out state prompt only by adding additional hardware, achieves the technical effect of indicating the state to be prompted through the sound emitted by the wireless transmitting coil, and reduces the hardware cost.
Description
Technical Field
The embodiment of the invention relates to an electronic circuit technology, in particular to a wireless charger and an information prompting method.
Background
With the increasing maturity of wireless charging technology, wireless charging of mobile terminal devices is favored by more and more people, but in the process of charging wireless charging devices, the charging state of the wireless charging devices often needs to be prompted.
In the prior art, a wireless charger mainly comprises a high-frequency signal generator and a wireless transmitting coil, the hardware cannot carry out state prompt, and in order to enable the wireless charger to carry out state prompt, prompt of different states can be realized mainly by adding prompt hardware in the wireless charger, typically by adding an LED (Light Emitting Diode) lamp or a buzzer and the like. For example: the different charging states of the wireless charging device are prompted to the user by changing the display color of the LED lamp or changing the sound emitted by the buzzer.
The inventors have found that the following drawbacks exist in the prior art in the process of implementing the present invention: as the LED lamp and the buzzer are both hardware devices, this undoubtedly increases the hardware implementation cost of the wireless charger.
Disclosure of Invention
The embodiment of the invention provides a wireless charger and an information prompting method, which are used for realizing state prompting through the wireless charger at low cost.
In a first aspect, an embodiment of the present invention provides a wireless charger, including: the wireless transmitting device comprises a transmitting signal generating module and a wireless transmitting coil, wherein at least one magnet is arranged at the periphery and/or the center of the wireless transmitting coil and used for forming a constant magnetic field around the wireless transmitting coil;
the transmitting signal generating module is connected with the wireless transmitting coil and used for generating a combined transmitting signal and sending the combined transmitting signal to the wireless transmitting coil, wherein the combined transmitting signal comprises a target signal with a signal frequency range within the range of human ear hearing.
In a second aspect, an embodiment of the present invention further provides an information prompting method, which is applied to the wireless charger according to any embodiment of the present invention, where the method includes:
acquiring a to-be-prompted state of wireless charging equipment which is in charging connection with the wireless charger;
determining signal parameters of a target signal matched with the state to be prompted, wherein the signal parameters comprise: signal frequency, and/or signal amplitude;
and constructing transmitting parameter information according to the signal parameters of the target signal, and transmitting the transmitting parameter information to the wireless transmitting coil so that the wireless transmitting coil can emit sound matched with the state to be prompted.
According to the embodiment of the invention, the technical means that a constant magnetic field is formed around the wireless transmitting coil and the transmitting signal generating module is controlled to generate a combined transmitting signal, and the combined transmitting signal comprises the target signal with the signal frequency range within the hearing range of the human ear is realized, so that the wireless transmitting coil is controlled to mechanically move under the constant magnetic field according to the signal parameters of the target signal to generate corresponding sound, the problem that the existing wireless charger can carry out state prompt only by adding additional hardware is solved, the technical effect that the state to be prompted is indicated by the sound generated by the wireless transmitting coil is achieved, and the hardware cost is reduced.
Drawings
FIG. 1 is a schematic diagram of an electromagnetic induction principle to which an embodiment of the present invention is applied;
fig. 2 is a schematic structural diagram of a wireless charger according to a first embodiment of the present invention;
fig. 3 is a schematic diagram of a structure in which a magnet is incorporated in a wireless transmitting coil according to a first embodiment of the present invention;
fig. 4 is a schematic structural diagram of a wireless charger according to a first embodiment of the present invention;
fig. 5 is a schematic structural diagram of a wireless charger according to a first embodiment of the present invention;
fig. 6 is a schematic structural diagram of a wireless charger according to a first embodiment of the present invention;
FIG. 7 is a flowchart of a message prompting method according to a second embodiment of the present invention;
fig. 8a is a schematic diagram of a signal envelope of a high frequency carrier signal according to a second embodiment of the present invention;
fig. 8b is a schematic diagram of a target signal envelope in a second embodiment of the invention;
fig. 8c is a schematic diagram of signal envelopes of a combined transmit signal according to a second embodiment of the present invention;
fig. 9 is a flowchart of an information prompting method in the third embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
For convenience of description, the implementation principle of the present disclosure will be first briefly described. In the embodiments of the invention, the inventor aims at the problem that in the prior art, hardware devices such as an LED lamp or a buzzer are required to be introduced into a wireless charger to carry out state prompt, and creatively provides new devices and new methods capable of generating corresponding prompt sounds for different prompt states without additionally introducing new prompt hardware. Namely: the technical scheme that the wireless transmitting coil sends out prompt sound is realized based on Faraday electromagnetic induction principle or Lenz law.
Fig. 1 is a schematic diagram of an electromagnetic induction principle to which an embodiment of the present invention is applied. With a varying current I in the coil AB in a constant magnetic field i When passing through, coil AB will move at speed V to a 'B' due to the principle of electromagnetic induction, i.e. a changing current will generate a magnetic field, i.e. a force F 'will be generated to cause movement of coil AB, but due to lenz's law, i.e. the magnetic flux generated by the induced current in the loop will always block the change of the magnetic flux causing the induced current, an opposite force F will be generated to block its movement. Namely: for a coil in a constant magnetic field, if the current flowing through the coil changes, this will cause movement of the coil, the frequency of movement of the coil being related to the frequency of the current change.
The inventors found that: in order for the wireless transmitting coil to be able to emit a warning sound recognizable by the human ear, two requirements are required: one is to generate a constant magnetic field around the wireless transmit coil; the other is that the frequency of the current to be passed through the wireless transmit coil can be identified by the human ear.
For the first requirement, the inventors propose to add one or more magnets in or inside the surrounding of the wireless transmit coil to generate the constant magnetic field; with respect to the second requirement, since the wireless transmitting coil needs to transmit a high-frequency ac signal, which is not recognized by the human ear, in order to realize the power supply to the wireless charging device, the inventors creatively proposed to superimpose a low-frequency ac signal, which is recognized by the human ear, on the basis of the high-frequency ac signal to realize the power supply to the wireless charging device through the high-frequency ac signal, and drive the wireless transmitting coil to perform mechanical movement through the low-frequency ac signal to generate sound, which is recognized by the human ear.
Example 1
Fig. 2 is a schematic structural diagram of a wireless charger according to an embodiment of the present invention, where the embodiment is applicable to a situation where a status of a wireless charging device is described, and the wireless charger may be implemented in a software and/or hardware manner. As shown in fig. 2, the wireless charger 10 of the present embodiment specifically includes: a transmit signal generation module 11 and a wireless transmit coil 12.
Wherein at least one magnet is provided around and/or in the center of the wireless transmitting coil 12 for forming a constant magnetic field around the wireless transmitting coil 12.
By way of example and not limitation, a case in which a single magnet 13 is provided at the center of the wireless transmitting coil 12 is shown in fig. 1 for visual representation.
The transmitting signal generating module 11 is connected to the wireless transmitting coil 12, and is configured to generate a combined transmitting signal and send the combined transmitting signal to the wireless transmitting coil 12, where the combined transmitting signal includes a target signal whose signal frequency range is within the range of human ear hearing.
The target signal in this embodiment can be generally understood as a low frequency signal.
Wherein the combined transmit signal may be the product of the high frequency carrier signal and the target signal. Meanwhile, the frequency range of the high-frequency carrier signal is 110KHz-205KHz; the frequency range of the target signal is 20Hz-20KHz.
After the transmitting signal generating module 11 sends the high-frequency carrier signal to the wireless transmitting coil 12, the wireless transmitting coil 12 may supply power to the connected wireless charging device based on the high-frequency carrier signal.
In an alternative implementation of the present embodiment, by way of example and not limitation, five magnets are specifically disposed in the wireless charger 10; one magnet is disposed in the middle of the wireless transmitting coil 12, and the other four magnets are disposed at intervals outside the wireless transmitting coil 12.
As shown in fig. 3, a schematic structure of adding a magnet in a wireless transmitting coil is shown, and by adding a magnet in the center of the wireless transmitting coil and four magnets around the wireless transmitting coil, the "magnetic attraction" effect can be added to better realize alignment while providing a constant magnetic field for the wireless transmitting coil.
Specifically, in order to form a constant magnetic field around the wireless transmitting coil so that the wireless transmitting coil can perform mechanical movement of corresponding frequency according to the frequency of the current passing through, one or more magnets may be provided around the wireless transmitting coil, preferably, the wireless transmitting coil may be equally or unequally divided into 4 arcs, one magnet may be provided outside each arc, or one or more magnets may be provided only in the center of the wireless transmitting coil; one or more magnets may be disposed around and in the center of the wireless transmitting coil, respectively, which is not limited in this embodiment.
According to the embodiment of the invention, the technical means that a constant magnetic field is formed around the wireless transmitting coil and the transmitting signal generating module is controlled to generate a combined transmitting signal, and the combined transmitting signal comprises the target signal with the signal frequency range within the hearing range of the human ear is realized, so that the wireless transmitting coil is controlled to mechanically move under the constant magnetic field according to the signal parameters of the target signal to generate corresponding sound, the problem that the existing wireless charger can carry out state prompt only by adding additional hardware is solved, the technical effect that the state to be prompted is indicated by the sound generated by the wireless transmitting coil is achieved, and the hardware cost is reduced.
On the basis of the above embodiment, as shown in fig. 4, the transmission signal generation module may include: the output end of the first frequency converter is connected with a wireless transmitting coil (an electric power output coil);
the first frequency converter is used for generating a first superposition signal and a second superposition signal and outputting the sum of the first superposition signal and the second superposition signal to the wireless transmitting coil;
wherein the sum of the first superimposed signal and the second superimposed signal matches the product of the high frequency carrier signal and the target signal.
Specifically, the AC/DC converter outputs a direct current, then converts the direct current through a control switch of an inverter circuit in the first frequency converter, outputs a signal of a signal frequency corresponding to a target signal and a signal of a signal frequency corresponding to a high-frequency carrier signal, determines signal parameters of a first superimposed signal and a second superimposed signal according to signal parameters of a combined transmission signal determined by the target signal and the high-frequency signal, and sends transmission parameter information to the wireless transmission coil.
The signal parameters of the first superimposed signal and the second superimposed signal are equal to the result of multiplying the signal parameters of the target signal and the signal parameters of the high-frequency carrier signal after the operation of the first superimposed signal and the second superimposed signal by using a sine-cosine integration sum difference formula. Thus, the frequency range of the generated combined transmitting signal is constructed to be within the hearing range of the human ear, and the state to be prompted of the wireless charging device is identified according to different sounds.
On the basis of the above embodiment, as shown in fig. 5. The transmission signal generation module includes: the first input end of the multiplier is connected with the first output end of the second frequency converter, the second input end of the multiplier is connected with the second output end of the second frequency converter, and the output end of the multiplier is connected with the wireless transmitting coil;
the second frequency converter is used for generating a target signal to be output through the first output end, and generating a high-frequency carrier signal to be output through the second output end;
and a multiplier for transmitting the product of the target signal and the high-frequency carrier signal to the wireless transmitting coil.
Similarly, if the wireless charging system includes a multiplier, the high-frequency carrier signal and the target signal output by the second frequency converter can be directly input into the multiplier, and a combined transmitting signal is generated and sent to the wireless transmitting coil, and the wireless charging system moves according to the signal envelope of the combined transmitting signal and emits a sound matched with the state to be prompted of the wireless charging device so as to prompt the user of the charging state and the information receiving state of the wireless charging device.
On the basis of the above embodiment, as shown in fig. 6. The wireless charger further includes: a processor; the processor is connected with the emission signal generation module;
the processor is used for determining signal parameters of a target signal matched with the state to be prompted according to the state to be prompted of the wireless charging equipment which is in charging connection with the wireless charger, wherein the signal parameters comprise: signal frequency, and/or signal amplitude; and constructing transmitting parameter information according to the signal parameters of the target signal, and transmitting the transmitting parameter information to the wireless transmitting coil so that the wireless transmitting coil emits sound matched with the state to be prompted.
The processor is further specifically configured to:
determining signal parameters of a combined transmitting signal according to the signal parameters of the target signal and the signal parameters of the high-frequency carrier signal, wherein the combined transmitting signal is the product of the target signal and the high-frequency carrier signal;
according to the signal parameters of the combined transmitting signals, determining the signal parameters of the first superposition signals and the second superposition signals as transmitting parameter information and transmitting the transmitting parameter information to the wireless transmitting coil;
wherein the sum of the first superimposed signal and the second superimposed signal is matched with the product of the high-frequency carrier signal and the target signal;
in the alternative, the processor is further specifically configured to:
and sending the signal parameters of the target signal and the signal parameters of the high-frequency carrier signal to the wireless transmitting coil as transmitting parameter information.
According to the technical scheme of the embodiment, the signal parameters of the combined transmitting signal are determined according to the signal parameters of the target signal and the signal parameters of the high-frequency carrier signal, which are determined according to the state to be prompted; according to the signal parameters of the combined transmitting signals, the corresponding transmitting parameter information is constructed to be sent to the wireless transmitting coil, so that the technical means that the wireless transmitting coil sends out the sound matched with the state to be prompted is realized, the effect that the charging state and the application information of the wireless charging equipment are prompted through the sound sent out by the wireless charging equipment is achieved, and the hardware cost is reduced.
Example two
Fig. 7 is a flowchart of an information prompting method according to a second embodiment of the present invention, where the present embodiment is applicable to a case of prompting a state of a wireless charging device (for example, a mobile phone or a tablet computer with a wireless receiving coil), and may be generally integrated in a wireless charger. The method of the embodiment specifically comprises the following steps:
s210, acquiring a to-be-prompted state of the wireless charging equipment which is in charging connection with the wireless charger.
It should be noted that, in a wireless charging system, the wireless charging transmitting end and the wireless charging receiving end generally comprise two parts, wherein the wireless charging transmitting end and the wireless charging receiving end are respectively configured with corresponding coils, namely, a wireless transmitting coil (power output coil) and a wireless receiving coil (power receiving coil), as shown in fig. 2, a schematic diagram of a wireless charging system applicable to the embodiment of the invention is shown, when an AC/DC converter outputs an alternating current to a frequency converter, the frequency converter inverts the direct current to an alternating current with a certain frequency and a certain voltage according to the inverter, and supplies power to the power output coil through the alternating current, when the power output coil emits a signal with a certain frequency, the power receiving coil changes the current flowing through the coil, so that the coil moves, the power receiving coil sends the received alternating current to a rectifying circuit, converts the alternating current to the direct current through the rectifying circuit, and sends the alternating current to a battery, thereby realizing the power supply to the battery.
Specifically, the wireless charging device may be any mobile terminal device capable of performing wireless charging, such as a wireless charging watch, a wireless charging mobile phone, etc., where the wireless transmitting coil is installed in a transmitter of the wireless charger, that is, the wireless charger includes a charging base and a transmitter, the base includes a buffer battery and an antenna, and the transmitter includes a wireless transmitting coil. Meanwhile, the wireless charging equipment comprises a wireless receiving coil which is used for receiving signals transmitted by the wireless transmitting coil.
When the wireless transmitting coil in the wireless charger is connected with the wireless charging device, the communication connection between the wireless charging device and the wireless charger is established, and accordingly, the wireless charging device can send a to-be-prompted state which needs to be prompted by a user to the wireless charger, and the wireless charger is used for prompting the user.
The state to be prompted of the wireless charging device may include a charging state, and/or a receiving state of application information, where the charging state includes at least one of the following: charging start, charging in progress, charging end, and charging abnormality;
the application information may include at least one of: instant messaging information, short messages, mail information and incoming call information.
In this embodiment, an example of wireless charging of the wireless charging watch will be described, when the wireless charger performs wireless charging on the wireless charging watch, when the wireless charging watch has abnormal charging in the charging process, the wireless charging watch feeds back the abnormal charging state of the wireless charging watch to the wireless charger, and the wireless charger performs corresponding sound prompt according to the received state to be prompted, that is, the wireless charger performs corresponding sound prompt according to the received abnormal charging state of the wireless charging watch.
For example, when the wireless charging mobile phone receives a short message, the user cannot check the short message, and the wireless charging mobile phone feeds back the state of receiving the short message to the wireless charger, that is, the wireless charger can acquire the state of receiving the short message by the wireless charging mobile phone. Therefore, the technical scheme of the invention is not limited to prompting the charging state of the wireless charging equipment, but also can detect and prompt the receiving state of the application information.
As an example and not by way of limitation, the state to be prompted of the wireless charging device is not limited to prompting the charging state and the receiving state of the application information, and when other states of the wireless charging device need to be prompted, the method in the embodiment may also be adopted to prompt the state.
Specifically, the wireless charging device is an air purifier, and the air purifier is in operation, and when the self electric quantity is less than 10%, a signal with a certain frequency is sent out to prompt a user that the electric quantity of the air purifier is insufficient, and the air purifier is charged in time. Or when the service life of the filter screen in the air purifier reaches the limit, a user can be reminded by sending out a certain frequency signal, the filter screen can be replaced in time, and the like. Likewise, wireless charging equipment also can be audio amplifier, intelligent desk lamp, charging table, electric toothbrush, electric iron, POS machine that charges, electric automobile, wallet etc. when being in the suggestion of its state, all can adopt the technical scheme of this embodiment to carry out the suggestion to its state.
S220, determining signal parameters of a target signal matched with the state to be prompted, wherein the signal parameters comprise: signal frequency, and/or signal amplitude.
In this scheme, since the signal frequency in wireless charging is out of the hearing range of the person, in order to enable the user to identify the to-be-prompted state of the wireless charging device through sound, the signal frequency of the wireless charging needs to be adjusted to be a target signal, and the frequency range of the target signal matched with the to-be-prompted state is located in the hearing range of the person's ear, typically, the frequency range of the target signal matched with the to-be-prompted state may be 20Hz-20KHz.
It should be noted that, different signal frequencies or different signal amplitudes (i.e. loudness) that can be resolved by the human ear can be set for different types of states to be prompted, so as to implement audio prompting for different types of states to be prompted.
The technical scheme of the embodiment is described with different signal frequencies corresponding to different types of states to be prompted. Illustratively, the to-be-prompted state includes: the signal frequency of the target signal corresponding to the charging start is assumed to be 100Hz, the frequency of the target signal corresponding to the charging end is assumed to be 300Hz, and the frequency of the target signal corresponding to the charging end is assumed to be 800 Hz.
Similarly, when the wireless charger receives different receiving states of application information, namely instant messaging information, short message, mail information and incoming call information, signal parameters corresponding to different target signals are also correspondingly set, for example, the signal frequency of the target signal corresponding to the incoming call information can be set to 2000Hz, and the receiving states of other application information can be correspondingly set according to user habits and requirements, so that the signal frequency of the target signal can be ensured to be within the range of 20Hz-20KHz.
Specifically, the different states to be prompted can also be distinguished by different signal amplitudes corresponding to the target signal, and the specific setting is similar to the setting of the signal frequency of the target signal. For example, when the charging is abnormal, the user needs to perform emergency processing, so that the signal amplitude of the target signal corresponding to the abnormal state of the charging is larger, that is, the loudness of the sound signal is larger, so that the user can conveniently perceive the abnormal charging of the wireless charging watch. For example, when the wireless charger receives the abnormal state of charge of the wireless charging watch, the signal frequency of the target signal is determined to be 1500Hz according to the abnormal state of charge.
S230, according to the signal parameters of the target signal, constructing transmitting parameter information and sending the transmitting parameter information to the wireless transmitting coil so that the wireless transmitting coil can emit sound matched with the state to be prompted.
It should be noted that, the signal envelope of the target signal shown in fig. 8c is constructed by the signal with the frequency F0 shown in fig. 8a and the target signal with the frequency Fs shown in fig. 8b, the signal envelope of the target signal matches the target signal, and the signal frequency range of the target signal is within 20Hz-20KHz.
Meanwhile, the frequency of the combined transmitting signal is in the range of human ear hearing, so that the frequency of the sound signal generated by the wireless transmitting coil in the movement is in the range of human ear hearing, and a user can judge the state to be prompted of the wireless charging equipment according to the sound signals with different frequencies.
It should be noted that in the prior art, a high-frequency signal with a certain frequency is generally directly generated by an inverter circuit in a frequency converter to supply power to a wireless transmitting coil (an electric power output coil), and in this embodiment, the inventor creatively proposes that a target signal which can be distinguished by a human ear is superimposed on the high-frequency signal, and amplitude modulation is performed on the high-frequency signal to generate an amplitude modulation signal, and transmitting parameter information which is constructed according to signal parameters of the target signal to the wireless transmitting coil, so as to realize voice prompt of a user through sound sent by the wireless transmitting coil.
In addition, the signal for supplying power to the wireless transmitting coil is a carrier signal, only the amplitude of the carrier signal is changed, and the frequency of the carrier signal is not changed, so that the combined transmitting signal is the signal envelope of an amplitude-modulated wave, and the amplitude-modulated wave can be determined according to the received signal frequency of the target signal determined by the state to be prompted. In the wireless charging process, the wireless transmitting coil moves according to the signal envelope of the low-frequency amplitude-modulated wave, and the signal frequency range of the low-frequency amplitude-modulated wave is 20Hz-20KHz, namely in the hearing range of the human ear, the low-frequency amplitude-modulated wave controls the wireless transmitting coil to move under the constant magnetic field generated by the magnet and send out a sound signal matched with the state to be prompted so as to prompt the state to be prompted of the wireless charging equipment of the user.
Specifically, when the wireless charging device is in different states to be prompted, the low-frequency modulation signal changes the signal frequency of the wireless charging device according to the different states to be prompted, the signal with the frequency and the carrier signal are modulated, a low-frequency amplitude modulation wave with preset frequency in the range of human ear hearing is generated, power is supplied to the wireless transmitting coil, transmitting parameter information is constructed according to signal parameters of a target signal and is sent to the wireless transmitting coil, and the wireless transmitting coil sends sound signals with different frequencies to prompt the user of the state to be prompted at the current moment of the wireless charging device.
According to the technical scheme, the to-be-prompted state of the wireless charging equipment which is in charging connection with the wireless charger is obtained; determining signal parameters of a target signal matched with the state to be prompted; according to the signal parameters of the target signals, the technical means that the transmitting parameter information is constructed and sent to the wireless transmitting coil so that the wireless transmitting coil transmits sound matched with the state to be prompted is achieved, the problem that the existing wireless charger needs to additionally add hardware to prompt the state of the wireless charging equipment is solved, the state to be prompted of the wireless charging equipment is indicated through the sound signals transmitted by the wireless transmitting coil, and therefore hardware cost is reduced.
Example III
Fig. 9 is a flowchart of an information prompting method provided in the third embodiment of the present invention, where the present embodiment is applicable to a case of prompting a wireless charging state, and the embodiment further optimizes S130 based on the second embodiment, and specifically includes the following steps:
s210, acquiring a to-be-prompted state of the wireless charging equipment which is in charging connection with the wireless charger.
S220, determining signal parameters of a target signal matched with the state to be prompted, wherein the signal parameters comprise: signal frequency, and/or signal amplitude.
S231, determining signal parameters of a combined transmitting signal according to the signal parameters of the target signal and the signal parameters of the high-frequency carrier signal, wherein the combined transmitting signal is the product of the target signal and the high-frequency carrier signal.
By way of example and not limitation, in this embodiment, the QI standard wireless charging is used to power the wireless charging coil, and the frequency range of the high frequency carrier signal F0 is 110KHz-205KHz, but since the frequency of the high frequency carrier signal is outside the human hearing range of 20Hz-20KHz, the sound signal generated by the wireless transmitting coil according to the movement of the high frequency carrier signal is difficult to hear by the human ear during the wireless charging. In the wireless charging process, the wireless transmitting coil moves along with the high-frequency carrier signal with the frequency of F0 in a constant magnetic field generated by a magnet in the wireless transmitting coil, and moves along with the signal envelope s of the target signal with the frequency of Fs, and the sound signal generated by the movement of the wireless transmitting coil along with the signal envelope of the target signal is audible to human ears because the Fs is in the hearing range, so that a user can monitor the state to be prompted of the wireless charging device according to the sound signals with different frequencies.
As shown in fig. 4, the AC/DC converter outputs a direct current, then converts the direct current through a control switch of an inverter circuit in the frequency converter, outputs a signal of a signal frequency corresponding to a target signal and a signal of a signal frequency corresponding to a high-frequency carrier signal, determines signal parameters of a first superimposed signal and a second superimposed signal according to signal parameters of a combined transmission signal determined by the target signal and the high-frequency signal, and transmits transmission parameter information to a wireless transmission coil. Wherein the sum of the first superimposed signal and the second superimposed signal matches the product of the high frequency carrier signal and the target signal.
It will be appreciated that the most intuitive way to construct an amplitude modulated wave with a signal envelope matching the combined transmit signal is to directly multiply the target signal with a high frequency ac signal (high frequency carrier signal), the result of which is the amplitude modulated wave of the combined transmit signal.
However, it is contemplated that only one frequency converter is used in the existing hardware configuration shown in fig. 4, and that a frequency converter generally only generates a superposition of one or more frequency signals. Therefore, the multiplication result of the target signal and the high-frequency carrier signal can be equivalently given as the sum of the first superimposed signal and the second superimposed signal by applying the sum and difference formula of the sine and cosine function.
The signal parameters include parameters such as signal frequency, signal amplitude, and the like, which are not limited, so long as different sounds can be emitted according to different signal parameters, so that a user can identify and distinguish different prompt states of the wireless charging device.
S232, according to the signal parameters of the combined transmitting signals, determining the signal parameters of the first superposition signals and the second superposition signals, and sending the signal parameters as transmitting parameter information to the wireless transmitting coil.
Wherein the sum of the first superimposed signal and the second superimposed signal matches the product of the high frequency carrier signal and the target signal.
The output end of the frequency converter is connected with the wireless transmitting coil.
It should be noted that, after the signal frequency of the target signal and the signal frequency of the high-frequency carrier signal are converted into the signal frequency of the first superimposed signal and the signal frequency of the second superimposed signal by the integration and difference formula of the sine and cosine functions, the signals of the first superimposed signal and the second superimposed signal are added to generate a combined transmitting signal in the audible frequency range of the human ear, so as to supply power to the wireless transmitting coil, and meanwhile, the combined transmitting signal is sent to the wireless transmitting coil, and the wireless transmitting coil generates a sound signal with a corresponding frequency according to the received combined transmitting signal so as to prompt the wireless charging state and the receiving state of the application information.
As an example and not by way of limitation, assuming that when the signal frequency of the target signal is 800Hz, it is detected that the wireless charging watch has been charged, the product of the target signal at 800Hz and the high-frequency carrier signal is converted into the sum of the first superimposed signal and the second superimposed signal, that is, the combined transmission signal at 800Hz is formed, and the combined transmission signal is sent to the wireless transmission coil, so that the wireless transmission coil emits a sound signal with a corresponding frequency to prompt the user that the wireless charging watch is fully charged, the wireless charging watch can be pulled out and used, thereby reducing the number of times the user checks the charge amount of the wireless charging watch, and timely knowing the charging state of the wireless charging watch.
Similarly, the size of the sound signal can be adjusted by adjusting the amplitude of the target signal, i.e. the target signals with different amplitudes, and the loudness of the sound signal is correspondingly different, for example, when the electric quantity of the electric toothbrush is lower than 5% and 20%, the amplitude of the target signal is relatively larger when the electric quantity is lower, i.e. the loudness of the sound signal is higher when the electric quantity is 5% than when the electric quantity is 20%.
It should be noted that, as shown in fig. 4, the signal frequency of the target signal and the signal frequency of the high-frequency carrier signal may be converted into the signal frequencies of the first superimposed signal and the second superimposed signal, and then the first superimposed signal and the second superimposed signal are added to construct a combined transmitting signal, and the combined transmitting signal is sent to the wireless transmitting coil to supply power, and a sound matched with the to-be-prompted state of the wireless charging device is emitted, where the transmitting signal generating module is directly connected to the wireless transmitting coil.
On the basis of the foregoing embodiment, according to the signal parameter of the target signal, transmit parameter information is configured to be sent to the wireless transmitting coil, and the method may further include:
and sending the signal parameters of the target signal and the signal parameters of the high-frequency carrier signal to the wireless transmitting coil as the transmitting parameter information.
It should be noted that, as shown in fig. 5, another schematic structure of the wireless charging system is shown, where the output end of the multiplier is connected to the wireless transmitting coil to supply power to the wireless transmitting coil. Specifically, two signals with different frequencies, namely a target signal and a high-frequency carrier signal, are output through an inverter circuit in a frequency converter, wherein the frequency range of the target signal is within 20Hz-20KHz, the frequency range of the high-frequency carrier signal is within 110KHz-205KHz, then the target signal and the high-frequency carrier signal are input into a multiplier, a combined transmitting signal is generated through modulation, the wireless transmitting coil is powered, the wireless transmitting coil moves along with the signals with different frequencies, and sound signals with different frequencies are emitted to remind a user of the state to be prompted of wireless charging equipment with the wireless receiving coil.
According to the technical scheme of the embodiment, the signal parameters of the combined transmitting signal are determined according to the signal parameters of the target signal and the signal parameters of the high-frequency carrier signal, which are determined according to the state to be prompted; according to the signal parameters of the combined transmitting signals, the corresponding transmitting parameter information is constructed to be sent to the wireless transmitting coil, so that the technical means that the wireless transmitting coil sends out the sound matched with the state to be prompted is realized, the effect that the charging state and the application information of the wireless charging equipment are prompted through the sound sent out by the wireless charging equipment is achieved, and the hardware cost is reduced.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
1. A wireless charger, comprising: the wireless transmitting device comprises a transmitting signal generating module and a wireless transmitting coil, wherein at least one magnet is arranged at the periphery and/or the center of the wireless transmitting coil and used for forming a constant magnetic field around the wireless transmitting coil;
the transmitting signal generating module is connected with the wireless transmitting coil and is used for generating a combined transmitting signal and sending the combined transmitting signal to the wireless transmitting coil, wherein the combined transmitting signal comprises a target signal with a signal frequency range within the range of human ear hearing;
and the wireless transmitting coil mechanically moves under the constant magnetic field according to the signal parameters of the target signal to generate corresponding sound.
2. The wireless charger of claim 1 wherein said combined transmit signal is the product of a high frequency carrier signal and said target signal.
3. The wireless charger of claim 2 wherein said transmit signal generation module comprises: the output end of the first frequency converter is connected with the wireless transmitting coil;
the first frequency converter is used for generating a first superposition signal and a second superposition signal and outputting the sum of the first superposition signal and the second superposition signal to the wireless transmitting coil;
wherein the sum of the first superimposed signal and the second superimposed signal matches the product of the high frequency carrier signal and the target signal.
4. The wireless charger of claim 2 wherein said transmit signal generation module comprises: the wireless transmitting device comprises a second frequency converter and a multiplier, wherein a first input end of the multiplier is connected with a first output end of the second frequency converter, a second input end of the multiplier is connected with a second output end of the second frequency converter, and an output end of the multiplier is connected with the wireless transmitting coil;
the second frequency converter is used for generating the target signal to be output through the first output end, and generating the high-frequency carrier signal to be output through the second output end;
the multiplier is configured to send a product of the target signal and the high-frequency carrier signal to the wireless transmitting coil.
5. The wireless charger of claim 1, wherein five magnets are specifically disposed in the wireless charger;
one magnet is arranged in the middle of the wireless transmitting coil, and the other four magnets are arranged outside the wireless transmitting coil at intervals.
6. The wireless charger of any one of claims 1-5, further comprising: a processor; the processor is connected with the emission signal generation module;
the processor is configured to determine, according to a to-be-prompted state of a wireless charging device that establishes a charging connection with the wireless charger, a signal parameter of the target signal that matches the to-be-prompted state, where the signal parameter includes: signal frequency, and/or signal amplitude; and constructing transmitting parameter information according to the signal parameters of the target signal, and transmitting the transmitting parameter information to the wireless transmitting coil so that the wireless transmitting coil can emit sound matched with the state to be prompted.
7. An information prompting method applied to the wireless charger as claimed in claim 6, comprising:
acquiring a to-be-prompted state of wireless charging equipment which is in charging connection with the wireless charger;
determining signal parameters of a target signal matched with the state to be prompted, wherein the signal parameters comprise: signal frequency, and/or signal amplitude;
and constructing transmitting parameter information according to the signal parameters of the target signal, and transmitting the transmitting parameter information to the wireless transmitting coil so that the wireless transmitting coil can emit sound matched with the state to be prompted.
8. The method according to claim 7, wherein the state to be prompted of the charging device comprises a charging state, and/or a receiving state of application information;
the state of charge includes at least one of: charging start, charging in progress, charging end, and charging abnormality;
the application information includes at least one of: instant messaging information, short messages, mail information and incoming call information.
9. The method of claim 7, wherein constructing transmission parameter information for transmission to the wireless transmission coil based on the signal parameters of the target signal, comprises:
determining signal parameters of a combined transmitting signal according to the signal parameters of the target signal and the signal parameters of a high-frequency carrier signal, wherein the combined transmitting signal is the product of the target signal and the high-frequency carrier signal;
determining signal parameters of a first superposition signal and a second superposition signal according to the signal parameters of the combined transmission signal, and sending the signal parameters as the transmission parameter information to the wireless transmission coil;
wherein the sum of the first superimposed signal and the second superimposed signal matches the product of the high frequency carrier signal and the target signal.
10. The method of claim 7, wherein constructing transmission parameter information for transmission to the wireless transmission coil based on the signal parameters of the target signal, comprises:
and sending the signal parameters of the target signal and the signal parameters of the high-frequency carrier signal to the wireless transmitting coil as the transmitting parameter information.
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| CN102545326A (en) * | 2011-12-30 | 2012-07-04 | 中兴通讯股份有限公司 | Wireless charging device and system and mobile terminal |
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| CN106899043A (en) * | 2015-12-17 | 2017-06-27 | 比亚迪股份有限公司 | Wireless charger and the method that incoming call prompting is carried out by wireless charger |
| CN207542850U (en) * | 2017-11-21 | 2018-06-26 | 出门问问信息科技有限公司 | A kind of wireless charger |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5932129B2 (en) * | 2013-06-07 | 2016-06-08 | オリンパス株式会社 | MEDICAL DEVICE POSITION DETECTION DEVICE, MEDICAL DEVICE POSITION DETECTION METHOD, AND ENDOSCOPE DEVICE |
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| CN102545326A (en) * | 2011-12-30 | 2012-07-04 | 中兴通讯股份有限公司 | Wireless charging device and system and mobile terminal |
| CN102670331A (en) * | 2012-06-04 | 2012-09-19 | 清华大学 | Electronic cochlear in-vitro debugging platform based on local area network (LAN) |
| CN106899043A (en) * | 2015-12-17 | 2017-06-27 | 比亚迪股份有限公司 | Wireless charger and the method that incoming call prompting is carried out by wireless charger |
| CN207542850U (en) * | 2017-11-21 | 2018-06-26 | 出门问问信息科技有限公司 | A kind of wireless charger |
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