CN109547895B - Microphone and karaoke method - Google Patents
Microphone and karaoke method Download PDFInfo
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- CN109547895B CN109547895B CN201811381974.3A CN201811381974A CN109547895B CN 109547895 B CN109547895 B CN 109547895B CN 201811381974 A CN201811381974 A CN 201811381974A CN 109547895 B CN109547895 B CN 109547895B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
- H04M1/72409—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality by interfacing with external accessories
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
- H04R1/083—Special constructions of mouthpieces
Abstract
The embodiment of the invention relates to the technical field of microphones and discloses a microphone and a karaoke method. The microphone of the present invention includes: the system comprises a power supply key, a Micro Control Unit (MCU) and an ultrahigh frequency UHF transmitting chip; the MCU is used for sending a transmitting instruction to the UHF transmitting chip when the power key is determined to be turned on; the UHF transmitting chip is used for receiving the transmitting instruction, generating an UHF signal according to the transmitting instruction and transmitting the UHF signal to the software protector connected with the terminal; the software protector generates a connection success signal after determining that the UHF signal is received, and transmits the connection success signal to the terminal to enable the terminal to display a karaoke interface. The karaoke interface on the terminal equipment can be directly opened according to the power supply key on the microphone, so that the space and the cost of the structural design of the microphone are saved.
Description
Technical Field
The embodiment of the invention relates to the technical field of microphones, in particular to a microphone and a karaoke method.
Background
At present, along with diversification of entertainment modes of people, the Karaoke is gradually popularized in life of people, and no matter the Karaoke is carried out in entertainment places such as KTV and the like or in family places, a set of complete Karaoke equipment is generally needed.
The inventor finds that at least the following problems exist in the prior art: when a singer needs to open the K song on the terminal equipment, the singer needs to manually press the power switch key on the microphone and then press the separate physical key, for example, the number key '1' is used for opening the K song picture on the terminal equipment which is in communication connection with the microphone, but the opening of K song software is realized by independently setting the physical key, so that the space and the cost of the structural design of the microphone are increased.
Disclosure of Invention
The embodiment of the invention aims to provide a microphone and a karaoke method, so that a karaoke interface on terminal equipment can be directly opened according to a power supply key on the microphone, and the space and the cost of the structural design of the microphone are saved.
To solve the above technical problem, an embodiment of the present invention provides a microphone including: the system comprises a power supply key, a Micro Control Unit (MCU) and an ultrahigh frequency UHF transmitting chip; the MCU is used for sending a transmitting instruction to the UHF transmitting chip when the power key is determined to be turned on; the UHF transmitting chip is used for receiving the transmitting instruction, generating an UHF signal according to the transmitting instruction and transmitting the UHF signal to the software protector connected with the terminal; the software protector generates a connection success signal after determining that the UHF signal is received, and transmits the connection success signal to the terminal to enable the terminal to display a karaoke interface.
The embodiment of the invention also provides a karaoke method, which comprises the following steps: the MCU sends a transmitting instruction to the UHF transmitting chip when determining that the power key is turned on; the UHF transmitting chip receives the transmitting instruction, generates an UHF signal according to the transmitting instruction and transmits the UHF signal to the software protector connected with the terminal; the software protector generates a connection success signal after determining that the UHF signal is received, and transmits the connection success signal to the terminal to enable the terminal to display a karaoke interface.
Compared with the prior art, the embodiment of the invention can directly open the K song interface on the terminal equipment which is in communication connection with the microphone under the condition that the power supply key is determined to be opened by arranging the power supply key, the MCU and the UHF transmitting chip, and does not need to independently arrange a physical key to open the K song interface, thereby saving the space and the cost of the structural design of the microphone.
In addition, the MCU is specifically used for determining that the power key is turned on according to the voltage change of a circuit connected with the power key. In this realization, when the power button is opened by the manual pressing, can cause the circuit voltage that the power button is connected to change, consequently, MCU passes through the voltage variation of the circuit that the power is connected, can be more direct convenient confirm the on-state of power button.
In addition, the UHF transmitting chip is specifically used for obtaining the dongle matched with the UHF signal through searching; the UHF signal is transmitted to the matched dongle. In the realization, the software protector matched with the UHF signal is obtained by searching through the UHF transmitting chip, so that the obtained software protector is more accurate.
In addition, the UHF transmitting chip is specifically used for acquiring a UHF protocol stored in the MCU; and searching according to the UHF protocol to obtain the dongle matched with the UHF signal, wherein the corresponding relation between the UHF signal and the dongle is stored in the UHF protocol.
In addition, the MCU is also used for monitoring the state of the UHF transmitting chip, and if the UHF transmitting chip is determined not to generate the UHF signal within the preset time, the MCU sends a transmitting instruction to the UHF transmitting chip again. In the realization, when the MCU determines that the UHF transmitting chip does not generate the UHF signal within the preset time, the situation that the UHF transmitting chip cannot receive the transmitting instruction due to communication faults is reduced by resending the transmitting instruction.
In addition, the UHF transmitting chip is in communication connection with the software protector in a wireless mode.
In addition, the dongle includes at least one UHF receiver chip; the UHF transmitter chip is specifically configured to transmit a UHF signal to any one of the UHF receiver chips.
In addition, the microphone further includes: and the timing device is specifically used for determining the first time when the MCU sends the transmission instruction to the UHF transmission chip and the second time when the UHF transmission chip generates the UHF signal. In the implementation, the first time when the MCU sends the transmission instruction can be determined by the timing device, and the second time when the UHF transmission chip generates the UHF signal can be determined by the second time when the UHF signal is generated, so that the time interval between the first time and the second time can be determined as the preset time specified by the transmission instruction that the MCU resends the transmission instruction when the communication fault occurs.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic structural diagram of a microphone in a first embodiment of the present application;
fig. 2 is a schematic view of an application scenario of a microphone in a first embodiment of the present application;
FIG. 3 is a schematic structural diagram of a microphone in a second embodiment of the present application;
FIG. 4 is a flowchart illustrating a method for singing K in the third embodiment of the present application;
fig. 5 is a flowchart illustrating a method for singing a song K in a fourth embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.
A first embodiment of the present invention relates to a microphone. As shown in fig. 1, the microphone 10 includes: a power key 11, a Micro Controller Unit (MCU) 12, and an Ultra High Frequency (UHF) transmitting chip 13.
The MCU12 is used for sending a transmitting instruction to the UHF transmitting chip 13 when the power key 11 is determined to be turned on; the UHF transmitting chip 13 is used for receiving the transmitting instruction, generating an UHF signal according to the transmitting instruction and transmitting the UHF signal to the software protector connected with the terminal; the software protector generates a connection success signal after determining that the UHF signal is received, and transmits the connection success signal to the terminal to enable the terminal to display a karaoke interface. In the present embodiment, a schematic view of an application scenario of a microphone is shown in fig. 2, a terminal 30 of the present embodiment is described by taking a television device as an example, a USB interface is provided on the terminal 30, and the dongle 20 is connected to the terminal 30 through the USB interface. And microphone 10 is communicatively coupled to dongle 20 by wireless means.
In this embodiment, the MCU is specifically configured to determine that the power key 11 is turned on according to a voltage variation of a circuit connected to the power key 11. In practical application, a circuit structure is generally arranged between the power key 11 and the MCU, the circuit structure is not labeled in fig. 1, when the power key 11 is manually pressed to be turned on, the voltage of the circuit structure connected to the power key 11 is changed, and the MCU can more directly and conveniently determine the on state of the power key 11 through the voltage change of the circuit structure connected to the power key.
Specifically, the UHF transmission chip 13 of the present embodiment is specifically used for obtaining a dongle matched with a UHF signal by searching; the UHF signal is transmitted to the matched dongle. The specific searching and signal transmission process is as follows: the UHF transmitting chip 13 acquires a UHF protocol stored in the MCU; and searching according to the UHF protocol to obtain the dongle matched with the UHF signal, wherein the corresponding relation between the UHF signal and the dongle is stored in the UHF protocol.
For example, the correspondence relationship between the UHF signal 1 and the dongle 1, the correspondence relationship between the UHF signal 2 and the dongle 2, and the correspondence relationship between the UHF signal 3 and the dongle 3 are stored in the UHF protocol stored in the MCU. And it is determined that the UHF transmitting chip 13 in the microphone generates the UHF signal 1, and what is connected to the terminal through the USB interface is the dongle 1, so that after the UHF transmitting chip 13 acquires the UHF protocol, it searches according to the UHF protocol to obtain the dongle 1 matched with the UHF signal 1, and transmits the UHF signal 1 to the dongle 1.
In the present embodiment, the UHF transmission chip 13 is in communication connection with the dongle in a wireless manner. And the dongle comprises at least one UHF receiver chip; the UHF transmitting chip 13 transmits the UHF signals to any one of the UHF receiving chips in a wireless communication manner.
It should be noted that, in this embodiment, the dongle and the terminal each include a control unit, the control unit in the dongle generates a connection success signal after receiving the UHF signal and transmits the connection success signal to the terminal, and the control unit in the terminal generates a song-K instruction after receiving the connection success signal and controls the display device in the terminal to display a song-K interface according to the song-K instruction. Of course, the working principle of the dongle and the terminal is not the main point in this application, and therefore the embodiments of this application will not be described in detail.
Compared with the prior art, the microphone provided by the embodiment can directly open the K song interface on the terminal device which is in communication connection with the microphone under the condition that the power key is determined to be turned on by arranging the power key, the MCU and the UHF transmitting chip, and the K song interface can be turned on without independently arranging the physical key, so that the space and the cost of the structural design of the microphone are saved.
A second embodiment of the present invention relates to a microphone, and the present embodiment is substantially the same as the first embodiment, and the specific configuration thereof is as shown in fig. 3. Wherein, the main improvement lies in: after the MCU determines that the power key is turned on and sends a transmission command to the UHF transmission chip, a step of monitoring the state of the UHF transmission chip by the MCU is added, and a timing device 14 is added on the basis of the microphone of the first embodiment.
Specifically, the timing device 14 in this embodiment is connected to the MCU12 and the UHF transmission chip 13, and the timing device 14 is configured to determine a first time when the MCU12 sends a transmission instruction to the UHF transmission chip 13 and a second time when the UHF transmission chip 13 generates a UHF signal when the microphone is operating normally, that is, when the internal structure is communicating normally. And determining the time interval between the first time and the second time, and taking the interval time as preset time.
The MCU12 also monitors the status of the UHF transmitter chip 13, and sends a transmission command to the UHF transmitter chip 13 again if it is determined that the UHF transmitter chip 13 does not generate a UHF signal within a preset time. For example, the time for the MCU12 to send the transmit command to the UHF transmitter chip 13 is 8:10:10, and assuming that the preset time is 5 seconds, if the MCU12 determines that the UHF transmitter chip 13 is at 8:10:15, no UHF signal is generated, which may be caused by a short communication failure between the MCU12 and the UHF transmitter chip 13, and then the transmit command is sent to the UHF transmitter chip 13 again. By resending the transmission instruction, the situation that the UHF transmission chip 13 cannot receive the transmission instruction due to communication failure is reduced. If the transmitting instruction is repeatedly sent for many times, and the UHF transmitting chip 13 does not generate the UHF signal within the preset time, it indicates that the communication fault between the MCU12 and the UHF transmitting chip 13 cannot be automatically recovered, and needs to be manually maintained.
Compared with the prior art, the microphone provided by the embodiment is provided with the power key, the MCU and the UHF transmitting chip, and the K song interface on the terminal equipment which is in communication connection with the microphone can be directly opened under the condition that the power key is determined to be opened, and the K song interface is opened without independently arranging a physical key, so that the space and the cost of the structural design of the microphone are saved. And by adding the timing equipment, the time interval between the time when the MCU sends the transmission instruction under the normal communication condition and the time when the UHF transmission chip generates the UHF signal can be determined, the time interval is used as the preset time under the communication fault condition, the MCU determines that the UHF transmission chip retransmits the transmission instruction when the UHF signal is not generated in the preset time, and the condition that the MCU cannot transmit the transmission instruction to the UHF transmission chip due to the communication fault is reduced.
It should be noted that each module referred to in this embodiment is a logical module, and in practical applications, one logical unit may be one physical unit, may be a part of one physical unit, and may be implemented by a combination of multiple physical units. In addition, in order to highlight the innovative part of the present invention, elements that are not so closely related to solving the technical problems proposed by the present invention are not introduced in the present embodiment, but this does not indicate that other elements are not present in the present embodiment.
A third embodiment of the present invention relates to a karaoke method applied to the microphone described in the first or second embodiment. The specific flow is shown in fig. 4, and includes the following steps:
Specifically, in this embodiment, the MCU determines that the power button is turned on according to a voltage variation of a circuit to which the power button is connected. In practical application, a circuit structure is generally arranged between the power key and the MCU, when the power key is opened by manual pressing, the voltage of the circuit structure connected with the power key can be changed, and the MCU can determine the opening state of the power key more directly and conveniently through the voltage change of the circuit structure connected with the power. And sends a transmission instruction to the UHF transmission chip under the condition that the power supply is switched on.
And step 302, the UHF transmitting chip receives the transmitting instruction, generates an UHF signal according to the transmitting instruction and transmits the UHF signal to the software protector connected with the terminal.
The software protector generates a connection success signal after determining that the UHF signal is received, and transmits the connection success signal to the terminal to enable the terminal to display a karaoke interface.
Specifically, in the embodiment, the UHF transmitting chip obtains the dongle matched with the UHF signal by searching; the UHF signal is transmitted to the matched dongle. The specific searching and signal transmission process is as follows: the UHF transmitting chip acquires a UHF protocol stored in the MCU; and searching according to the UHF protocol to obtain the dongle matched with the UHF signal, wherein the corresponding relation between the UHF signal and the dongle is stored in the UHF protocol.
For example, the correspondence relationship between the UHF signal 1 and the dongle 1, the correspondence relationship between the UHF signal 2 and the dongle 2, and the correspondence relationship between the UHF signal 3 and the dongle 3 are stored in the UHF protocol stored in the MCU. And the UHF transmitting chip in the microphone is determined to generate the UHF signal 1, and the dongle 1 connected with the terminal through the USB interface is determined, so that after the UHF transmitting chip acquires the UHF protocol, the UHF transmitting chip searches according to the UHF protocol to obtain the dongle 1 matched with the UHF signal 1, and transmits the UHF signal 1 to the dongle 1.
In this embodiment, the UHF transmitting chip is in communication connection with the dongle in a wireless manner. And the dongle comprises at least one UHF receiver chip; the UHF transmitting chip transmits the UHF signal to any one UHF receiving chip in a wireless communication mode.
Compared with the prior art, the karaoke interface on the terminal device in communication connection with the microphone can be directly opened under the condition that the power key is determined to be turned on by the karaoke method provided by the embodiment without independently setting a physical key to turn on the karaoke interface, so that the space and the cost of the structural design of the microphone are saved.
A fourth embodiment of the present invention relates to a karaoke method. The embodiment is further improved on the basis of the third embodiment, and the specific improvements are as follows: the flow of the karaoke method in this embodiment is shown in fig. 5. Specifically, in this embodiment, the method includes steps 401 to 403, where step 401 is substantially the same as step 301 in the first embodiment, and step 403 is substantially the same as step 302 in the first embodiment, and details are not repeated here, and differences are mainly introduced below, and technical details not described in detail in this embodiment may be referred to the method for singing a song K provided in the first embodiment, and details are not repeated here.
In step 401, the MCU sends a transmission command to the UHF transmission chip when it is determined that the power key is turned on.
And 402, monitoring the state of the UHF transmitting chip by the MCU, and if the UHF transmitting chip is determined not to generate the UHF signal within the preset time, sending a transmitting instruction to the UHF transmitting chip again.
In this embodiment, in the case that the microphone is normally operated, that is, the internal structure is normally in communication, the timing device in this embodiment determines a first time when the MCU sends the transmission instruction to the UHF transmission chip and a second time when the UHF transmission chip generates the UHF signal. And determining the time interval between the first time and the second time, and taking the interval time as preset time.
In a specific implementation, the time for the MCU to send the transmission instruction to the UHF transmission chip is 8:10:10, and assuming that the preset time is 5 seconds, if the MCU determines that the UHF transmission chip is at 8:10:15, no UHF signal is generated, which may be caused by a short communication fault between the MCU and the UHF transmission chip, and at this time, the UHF transmission chip may not receive the transmission instruction, and then re-send the transmission instruction to the UHF transmission chip. The communication fault can be automatically recovered under the condition that the network is recovered due to network reasons, so that the situation that the MCU cannot transmit the transmission instruction to the UHF transmission chip due to the communication fault is reduced by retransmitting the transmission instruction.
And 403, the UHF transmitting chip receives the transmitting instruction, generates an UHF signal according to the transmitting instruction and transmits the UHF signal to the dongle connected with the terminal.
Compared with the prior art, the karaoke interface on the terminal device in communication connection with the microphone can be directly opened by the karaoke method provided by the embodiment under the condition that the power key is determined to be opened, and the karaoke interface is opened without independently setting a physical key, so that the space and the cost of the structural design of the microphone are saved. And monitoring the state of the UHF transmitting chip through the MCU, and if the UHF transmitting chip is determined not to generate the UHF signal within the preset time, transmitting the transmitting instruction to the UHF transmitting chip again. Therefore, the situation that the UHF transmitting chip cannot receive the transmitting instruction due to communication faults is reduced.
The steps of the above methods are divided for clarity, and the implementation may be combined into one step or split some steps, and the steps are divided into multiple steps, so long as the same logical relationship is included, which are all within the protection scope of the present patent; it is within the scope of the patent to add insignificant modifications to the algorithms or processes or to introduce insignificant design changes to the core design without changing the algorithms or processes.
The embodiments described are specific examples of the practice of the invention and various changes in form and detail may be made therein without departing from the spirit and scope of the invention in practice.
Claims (8)
1. A microphone, comprising: the system comprises a power supply key, a Micro Control Unit (MCU) and an ultrahigh frequency UHF transmitting chip;
the MCU is used for determining that the power key is turned on according to the voltage change of a circuit connected with the power key and sending a transmitting instruction to the UHF transmitting chip when determining that the power key is turned on;
the UHF transmitting chip is used for receiving the transmitting instruction, generating an UHF signal according to the transmitting instruction and transmitting the UHF signal to a software protector connected with a terminal;
the software protector generates a connection success signal after determining that the UHF signal is received, and transmits the connection success signal to the terminal to enable the terminal to display a karaoke interface;
the MCU is also used for monitoring the state of the UHF transmitting chip, and if the UHF transmitting chip is determined not to generate the UHF signal within the preset time, the MCU is used for sending the transmitting instruction to the UHF transmitting chip again.
2. The microphone according to claim 1, characterized in that the UHF transmitting chip is specifically adapted to,
obtaining the dongle matched with the UHF signal by searching;
and transmitting the UHF signal to the matched software protector.
3. Microphone according to claim 2, characterized in that the UHF transmitting chip is specifically intended for,
acquiring a UHF protocol stored in the MCU;
and searching according to the UHF protocol to obtain the dongle matched with the UHF signal, wherein the corresponding relation between the UHF signal and the dongle is stored in the UHF protocol.
4. The microphone of claim 1 wherein the UHF transmitting chip is in wireless communication with the dongle.
5. The microphone of claim 4, wherein the dongle comprises at least one UHF receiving chip;
the UHF transmitting chip is specifically configured to transmit the UHF signal to any one of the UHF receiving chips.
6. The microphone of claim 5, further comprising: and the timing device is specifically used for determining a first time when the MCU sends a transmission instruction to the UHF transmission chip and a second time when the UHF transmission chip generates the UHF signal.
7. A karaoke method applied to the microphone of any one of claims 1 to 6, comprising:
the MCU sends a transmitting instruction to the UHF transmitting chip when determining that the power key is turned on;
the UHF transmitting chip receives the transmitting instruction, generates the UHF signal according to the transmitting instruction and transmits the UHF signal to a software protector connected with a terminal;
and the dongle generates a connection success signal after determining that the UHF signal is received, and transmits the connection success signal to the terminal to enable the terminal to display a karaoke interface.
8. The karaoke method according to claim 7, wherein after the MCU sends a transmission command to the UHF transmission chip when it is determined that the power button is turned on, the method further comprises:
and the MCU monitors the state of the UHF transmitting chip, and if the UHF transmitting chip is determined not to generate the UHF signal within the preset time, the MCU sends the transmitting instruction to the UHF transmitting chip again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811381974.3A CN109547895B (en) | 2018-11-20 | 2018-11-20 | Microphone and karaoke method |
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| CN201811381974.3A CN109547895B (en) | 2018-11-20 | 2018-11-20 | Microphone and karaoke method |
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| CN109547895A CN109547895A (en) | 2019-03-29 |
| CN109547895B true CN109547895B (en) | 2021-03-05 |
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| CN112489609A (en) * | 2020-11-03 | 2021-03-12 | 深圳创维－Rgb电子有限公司 | Microphone-based method, device, terminal and medium for automatically jumping K song block |
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| CN201499279U (en) * | 2009-09-24 | 2010-06-02 | 浙江大学城市学院 | Combined type remote control microphone |
| CN203165444U (en) * | 2012-12-07 | 2013-08-28 | 广东翼卡车联网服务有限公司 | Vehicle-mounted portable karaoke apparatus |
| CN104318917A (en) * | 2014-10-30 | 2015-01-28 | 深圳市晟视讯科技有限公司 | Android karaoke machine |
| CN205375792U (en) * | 2016-01-13 | 2016-07-06 | 四川长虹电器股份有限公司 | Take remote controller of karaoke function |
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| CN109547895A (en) | 2019-03-29 |
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