CN108322239A - A kind of short distance is unidirectionally powered the circuit structure of reverse link communication - Google Patents
A kind of short distance is unidirectionally powered the circuit structure of reverse link communication Download PDFInfo
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- CN108322239A CN108322239A CN201810079439.6A CN201810079439A CN108322239A CN 108322239 A CN108322239 A CN 108322239A CN 201810079439 A CN201810079439 A CN 201810079439A CN 108322239 A CN108322239 A CN 108322239A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/79—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/72—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for local intradevice communication
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Electronic Switches (AREA)
Abstract
It unidirectionally powers the invention discloses a kind of short distance the circuit structure of reverse link communication, it includes DC power supply, host, slave, the first triode, first resistor, second resistance, 3rd resistor, the 4th resistance, storage capacitor, diode and switch module, and the 3rd resistor and the 4th resistance are used for current limliting.The present invention realizes the short distance one-way communication that terminal room is completed using few electronic component and power cord, has both saved cost and the energy, moreover it is possible to reduce interference when communication, communication is made to become very simple.
Description
Technical field
It unidirectionally powers the present invention relates to electronic circuit field more particularly to a kind of short distance the circuit structure of reverse link communication.
Background technology
The working method that signal unidirectionally can only be sent and be unable to reverse link communication is called simplex communication, as broadcasting station is reported outward
Information；Communicating pair can realize the working method of two-way communication duplex communication, such as intercom.In these communication modes, lead to
Letter both sides' distance is all referred to as short-range communication within tens meters.Because of the relationship that function is realized, have in live and work
The application of many short distance simplex communications, if data collection terminal is to data processing end transmission information, control panel terminal to master control
End sends signal etc., common features of these applications are that transmitted data amount is small and real-time height etc., and currently used short distance is logical
Letter mode has two kinds of wireless communication and wire communication.
In the short distance wireless communication technology, Bluetooth communication, Wi-Fi communications, irDA communications and ZigBee communication are more normal
See.But carry out data transmission that there are of high cost, the unstable, power consumption of transmission are big and to surrounding enviroment using wireless communication technique
It is required that the shortcomings of high；And it needs to increase wireless communication device and antenna in equipment；Common short distance cable communicating technology is logical
It often needs to be powered terminal using low-tension supply, and needs to be connected with transmission line with power cord, ground wire between principal and subordinate's module,
The normal communication between normal work and terminal to just can guarantee terminal；Also interminable interconnecting cable line greatly increases
The cost of whole system；Power line communication (PLC) is communicated using power line, it is by modulated high-frequency signal with electric current
It is transmitted on power line for carrier, is sent to terminal after receiving terminal is by filtering and demodulation, plc communication has transmission information
Amount is big, transmission speed is fast, can two-way communication the advantages that, but cost is high, and transmitted data amount is smaller and apart from not far logical
Letter does not need to the power of plc communication, if using plc communication, is bound to cause this waste.
A kind of new above technical problem of technical solution solution need now be found.
Invention content
The technical problem to be solved by the present invention is in order to overcome the defects of the prior art, it is unidirectional now provide a kind of short distance
The circuit structure of power supply reverse link communication realizes unidirectional using the short distance of few electronic component and power cord completion terminal room
Communication, has both saved cost and the energy, moreover it is possible to reduce interference when communication, communication is made to become very simple.
The present invention is to solve above-mentioned technical problem by following technical proposals：
A kind of short distance of the present invention is unidirectionally powered the circuit structure of reverse link communication, and feature is that the short distance is unidirectional
The circuit structure of power supply reverse link communication includes DC power supply, host, slave, the first triode, first resistor, second resistance, the
Three resistance, the 4th resistance, storage capacitor, diode and switch module, the 3rd resistor and the 4th resistance are used for current limliting,
Wherein：
The power input positive terminal of the slave, first triode is connected in parallel in the anode of the DC power supply
One end of emitter and the second resistance, the other end of the second resistance be connected in parallel one end of the 3rd resistor,
The other end of the positive terminal of one end and the diode of the 4th resistance, the 4th resistance connects the switch module
One end of the storage capacitor and the power input anode of the host is connected in parallel in the negative pole end of first end, the diode
End, the collector of first triode be connected in parallel the slave receiver port and the first resistor it is another
End, the base stage of first triode connect the other end of the 3rd resistor；
The cathode of the DC power supply be connected in parallel the power input negative pole end of the slave, the first resistor one
It holds, the power input negative pole end of the second end of the switch module, the other end of the storage capacitor and the host, the master
The signal emission port of machine is connect with the third end of the switch module, and the host is by controlling the switch module to described
Slave sends signal, and when the host does not send signal, the switch module is closed, and the second resistance both end voltage is less than
The first triode cut-in voltage, when the host sends signal, the switch module ground connection is opened to make described second
Resistance both end voltage is more than the first triode cut-in voltage, and the first triode unlatching makes the slave receive signal.
Preferably, the switch module includes metal-oxide-semiconductor, and draining for the metal-oxide-semiconductor is described another with the 4th resistance
End connection, the grid of the metal-oxide-semiconductor connect with the signal emission port of the host, the source electrode of the metal-oxide-semiconductor with it is described
The power input negative pole end of host connects.
Preferably, the switch module includes the second triode and the 5th resistance, and the 5th resistance is used for current limliting, described
The base stage of second triode is connect with one end of the 5th resistance, and the other end of the 5th resistance is described with the host
Signal emission port connects, and the collector of second triode connect with the other end of the 4th resistance, and described the
The other end of four resistance is connect with the anode of the diode, the emitter of second triode and the electricity of the host
Source inputs negative pole end connection.
Preferably, unidirectionally the power circuit structure of reverse link communication of the short distance further includes rectification circuit, the rectified current
Road include the second diode, third diode, the 4th diode and the 5th diode, second diode anode and it is described
The cathode of 4th diode connects, and the anode of the third diode is connected with the cathode of the 5th diode, and described second
The anode and described the of first diode is connected in parallel in the cathode of the cathode of diode and the third diode
The switch is connected in parallel in described one end of four resistance, the anode of the 4th diode and the anode of the 5th diode
The second end of module, the other end of the second resistance and described one end of the 3rd resistor be connected in parallel in
Between the anode and the cathode of the 4th diode of second diode, the described of the DC power supply is born
Pole, the power input negative pole end of the slave, the first resistor described one end be connected in parallel in the described 3rd 2
Between the anode and the cathode of the 5th diode of pole pipe.
The positive effect of the present invention is that：
The present invention is realized is combined into one progress closely wired one-way communication by power cord and signal transmssion line, power supply from
It powers from generator terminal to host side, slave and host share a power supply, realize complete using few electronic component and power cord
At the short distance one-way communication of terminal room, cost and the energy have both been saved, moreover it is possible to reduce interference when communication, communication is made to become ten
Divide simple.
Description of the drawings
Fig. 1 is the circuit mechanism system schematic of the first preferred embodiment of the present invention.
Fig. 2 is the circuit mechanism system schematic of second of preferred embodiment of the present invention.
Fig. 3 is the circuit mechanism system schematic of the third preferred embodiment of the present invention.
Fig. 4 is the circuit mechanism system schematic of the 4th kind of preferred embodiment of the present invention.
Fig. 5 is that the circuit waveform of the present invention compares schematic diagram.
Specific implementation mode
It is further illustrated the present invention below by the mode of embodiment, but does not therefore limit the present invention to the reality
It applies among a range.
It please refers to Fig.1 and Fig. 2, a kind of short distance of the present invention is unidirectionally powered the circuit structure of reverse link communication, including direct current
Source VDD, host, slave, the first triode Q1, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, energy storage
Capacitance C1, diode D1 and switch module, 3rd resistor R3 and the 4th resistance R4 are used for current limliting, wherein：
The emitter of the power input positive terminal of slave, the first triode Q1 is connected in parallel in the anode of DC power supply VDD
With one end of second resistance R2, one end of 3rd resistor R3, the 4th resistance R4 is connected in parallel in the other end of second resistance R2
The positive terminal of one end and diode D1, the first end of the other end connecting valve module of the 4th resistance R4, the cathode of diode D1
The power input positive terminal of one end and host of storage capacitor C1 is connected in parallel in end, and the collector of the first triode Q1 is in parallel
Connect the other end of the receiver port RX and first resistor R1 of slave, the base stage connection 3rd resistor R3 of the first triode Q1
The other end；
The power input negative pole end of slave, one end of first resistor R1, switch is connected in parallel in the cathode of DC power supply VDD
The power input negative pole end of the second end of module, the other end of storage capacitor C1 and host, the signal emission port TX of host with
The third end of switch module connects, and host is controlled to slave by switch module and sends signal, is opened when host does not send signal
It closes module to close, second resistance R2 both end voltages are less than the first triode Q1 cut-in voltages, the switching molding when host sends signal
Block ground connection opens that second resistance R2 both end voltages is made to be more than the first triode Q1 cut-in voltages, and the first triode Q1 unlatchings make
Slave receives signal.
As the first embodiment of the present invention, as shown in Figure 1, switch module includes metal-oxide-semiconductor, the drain electrode of metal-oxide-semiconductor and the
The other end of four resistance R4 connects, the signal emission port TX connections of the grid and host of metal-oxide-semiconductor, the source electrode of metal-oxide-semiconductor and
The power input negative pole end of host connects.
As second of embodiment of the present invention, as shown in Fig. 2, switch module includes the second triode Q2 and the 5th resistance
R5, the 5th resistance R5 are used for current limliting, and the base stage of the second triode Q3 is connect with one end of the 5th resistance R5, the second triode Q3's
Collector is connect with the other end of the 4th resistance R4, the emission electrode of the second triode Q2 and the power input cathode of host
End connection, the signal emission port TX connections of the other end and host of the 5th resistance R5.
The case where to avoid host from reversal connection and cisco unity malfunction occur in connection, can use bridge rectifier in host computer side
Circuit, the circuit can realize the positive and negative random wiring of host power supply line, and the positive power supply for not influencing entire circuit is led to reversed
Letter, it is preferable that the present invention may also include rectification circuit.Rectification circuit includes the second diode D2, third diode D3, the four or two
The anode of pole pipe D4 and the 5th diode D5, the second diode D2 are connected with the cathode of the 4th diode D4, third diode D's
Anode is connected with the cathode of the 5th diode D5, and the cathode of the second diode D2 and the cathode of third diode D3 are connected in parallel
The anode of first diode D1 and described one end of the 4th resistance R4, the anode of the 4th diode D4 and the 5th diode D5 are just
The second end of switch module, the other end of second resistance R2 and described one end of 3rd resistor R3 is connected in parallel in pole
It is connected in parallel between the anode and the cathode of the 4th diode D4 of the second diode D2, cathode, the slave of DC power supply VDD
Power input negative pole end, first resistor R1 described one end anode and the five or two pole in third diode D3 is connected in parallel
Between the cathode of pipe D5.
As the third embodiment of the present invention, as shown in figure 3, the sources connected in parallel of metal-oxide-semiconductor be connected to the 4th diode D4
Anode and the 5th diode D5 anode, the cathode of the second diode D2 and the cathode of third diode D3 are connected in parallel the
The anode of one diode D1 and described one end of the 4th resistance R4.
The case where to avoid host from reversal connection and cisco unity malfunction occur in connection, can use bridge rectifier in host computer side
Circuit, the circuit can realize the positive and negative random wiring of host power supply line, and the positive power supply for not influencing entire circuit is led to reversed
Letter.As the fourth embodiment of the present invention, as shown in figure 4, the emitter of the second triode is being connected to the 4th diode D4 just
The anode of pole and the 5th diode D5, the cathode of the second diode D2 and the cathode of third diode D3 are connected in parallel the one or two
The anode of pole pipe D1 and described one end of the 4th resistance R4.
First resistor R1 of the present invention is added in the collector of the first triode Q1 and is turned with the electric current for generating the first triode Q1
Change voltage into, second resistance R2 is added between the base stage and emitter of the first triode Q1 to generate bias voltage Vbe, third electricity
The current-limiting resistance that R3 is the first triode Q1 is hindered, the 4th resistance R4 is the current-limiting resistance of metal-oxide-semiconductor M1, the electricity of the 4th resistance R4 and the 5th
The current-limiting resistance that R5 is the second triode Q2 is hindered, diode D1 can prevent the electric current backflow on storage capacitor C1.Power vd D exists
Slave side, while powering to host and slave, I2 is the supply current of host, and I3 is the electricity for flowing through M1 or the second triode Q2
Stream, the sum of electric current I2 and I3 are power cord total current I1.When normal work, host sends signal by signal emission port TX,
Signal by current-modulation is received by receiver port RX by slave.Host is for controlling metal-oxide-semiconductor M1 or the two or three pole
The on and off of pipe Q2, storage capacitor C1 ensure that electric current I2 does not change always.
Fig. 5 is referred to, the specific work process of circuit of the present invention is as follows：When host not transmission data, signal transmitting terminal
Mouth TX exports low level, and metal-oxide-semiconductor M1 is closed, I1=I2, and the voltage Va-Vb at the both ends second resistance R2 is less than the first triode Q1's
Starting voltage Von, the voltage that the voltage Va-Vb at the both ends second resistance R2 is generated cannot be such that the first triode Q1 opens, and the one or three
Pole pipe Q1 no currents flow through, and slave no signal inputs at this time.When host need to slave send signal when, host first by signal into
Row modulation, modulated signal export low and high level to control the switch of metal-oxide-semiconductor M1 by signal emission port TX.When signal is sent out
When penetrating port TX output high level, metal-oxide-semiconductor M1 is opened, and electric current I3 flows to ground through metal-oxide-semiconductor M1, at this time I1=I2+I3, on electric current I1
It rising, the voltage Va-Vb at the both ends second resistance R2 is more than the cut-in voltage of the first triode Q1, and the first triode Q1 is opened, and first
There is electric current to flow through on resistance R1 and generate voltage VC, last voltage VC is received by slave；When TX exports low level, voltage VC=
0V.Need to be that second resistance R2 and the 4th resistance R4 select suitable resistance value, to ensure not open in metal-oxide-semiconductor M1 in design
When (I3=0), the product (i.e. V1) of electric current I1 and R2 is less than the cut-in voltage of Q1；And when ensureing that metal-oxide-semiconductor M1 is opened, electric current I1 with
The product (i.e. V2) of second resistance R2 is more than the cut-in voltage of the first triode Q1.Assuming that the cut-in voltage of the first triode Q1 is
Von then meets：0 ＜ V1=I2 × R2 ＜ Von；V2=(I2+I3) × R2 ＞ Von, and ensure I3 × R2 ＞ Von.Profit of the invention
Signal is transmitted with electric current modulation system, short distance one-way communication is carried out using power cord, removes host terminal and slave terminal, host
A power supply is shared with slave, circuit of the present invention has only used a triode, a metal-oxide-semiconductor, a diode, a capacitance
The communication of terminal room just can be completed with four resistance (or two triodes, a diode, a capacitance and four resistance), it is real
Show and has only increased a small amount of electronic component on circuit just and can complete the communication of terminal room.Above in association with attached drawing embodiment to this hair
Bright to be described in detail, those skilled in the art can make many variations example to the present invention according to the above description.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the present invention
Within the scope of shield.Thus, certain details in embodiment should not constitute limitation of the invention, and the present invention will be wanted with appended right
Ask the range that book defines as protection scope of the present invention.
Claims (4)
- The circuit structure of reverse link communication 1. a kind of short distance is unidirectionally powered, which is characterized in that unidirectionally power supply is reversed for the short distance The circuit structure of communication includes DC power supply, host, slave, the first triode, first resistor, second resistance, 3rd resistor, Four resistance, storage capacitor, diode and switch module, the 3rd resistor and the 4th resistance are used for current limliting, wherein：The transmitting of the power input positive terminal, first triode of the slave is connected in parallel in the anode of the DC power supply One end of the 3rd resistor, described is connected in parallel in one end of pole and the second resistance, the other end of the second resistance The other end of the positive terminal of one end and the diode of the 4th resistance, the 4th resistance connects the first of the switch module One end of the storage capacitor and the power input positive terminal of the host is connected in parallel in end, the negative pole end of the diode, The other end of the receiver port and the first resistor of the slave is connected in parallel in the collector of first triode, The base stage of first triode connects the other end of the 3rd resistor；The cathode of the DC power supply be connected in parallel the power input negative pole end of the slave, the first resistor one end, The power input negative pole end of the second end of the switch module, the other end of the storage capacitor and the host, the host Signal emission port connect with the third end of the switch module, the host by control the switch module to it is described from Machine sends signal, and when the host does not send signal, the switch module is closed, and the second resistance both end voltage is less than institute The first triode cut-in voltage is stated, the switch module ground connection opens to make second electricity when the host sends signal It hinders both end voltage and is more than the first triode cut-in voltage, the first triode unlatching makes the slave receive signal.
- The circuit structure of reverse link communication 2. short distance according to claim 1 is unidirectionally powered, which is characterized in that the switch Module includes metal-oxide-semiconductor, and the drain electrode of the metal-oxide-semiconductor is connect with the other end of the 4th resistance, the grid of the metal-oxide-semiconductor with The signal emission port of the host connects, the power input negative pole end of the source electrode of the metal-oxide-semiconductor and the host Connection.
- The circuit structure of reverse link communication 3. short distance according to claim 1 is unidirectionally powered, which is characterized in that the switch Module include the second triode and the 5th resistance, the 5th resistance be used for current limliting, the base stage of second triode with it is described One end of 5th resistance connects, and the other end of the 5th resistance is connect with the signal emission port of the host, described The collector of second triode is connect with the other end of the 4th resistance, the other end and described two of the 4th resistance The anode connection of pole pipe, the emitter of second triode are connect with the power input negative pole end of the host.
- The circuit structure of reverse link communication 4. short distance according to claim 1 is unidirectionally powered, which is characterized in that the low coverage Circuit structure from unidirectional power supply reverse link communication further includes bridge rectifier, and the bridge rectifier includes the two or two pole Pipe, third diode, the 4th diode and the 5th diode, the anode of second diode and bearing for the 4th diode Pole connect, the third diode anode connected with the cathode of the 5th diode, the cathode of second diode with The anode and described the one of the 4th resistance of first diode is connected in parallel in the cathode of the third diode End, the anode of the 4th diode and the anode of the 5th diode are connected in parallel described the second of the switch module End, the other end of the second resistance and described one end of the 3rd resistor are connected in parallel in second diode The anode and the cathode of the 4th diode between, the cathode of the DC power supply, the institute of the slave State power input negative pole end, described one end of the first resistor be connected in parallel in the third diode it is described anode and Between the cathode of 5th diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810079439.6A CN108322239B (en) | 2018-01-26 | 2018-01-26 | Close-range unidirectional power supply reverse communication circuit structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810079439.6A CN108322239B (en) | 2018-01-26 | 2018-01-26 | Close-range unidirectional power supply reverse communication circuit structure |
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| Publication Number | Publication Date |
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| CN108322239A true CN108322239A (en) | 2018-07-24 |
| CN108322239B CN108322239B (en) | 2024-04-16 |
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| CN201810079439.6A Active CN108322239B (en) | 2018-01-26 | 2018-01-26 | Close-range unidirectional power supply reverse communication circuit structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110071742A (en) * | 2019-06-04 | 2019-07-30 | 福州优朋电子有限公司 | A kind of low-power consumption short distance half-duplex Power Carrier telecommunication circuit and communication means |
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| CN102324952A (en) * | 2011-09-30 | 2012-01-18 | 深圳麦克维尔空调有限公司 | Non-polar two-line system communication circuit |
| CN202602274U (en) * | 2012-05-08 | 2012-12-12 | 北京益弘泰科技发展有限责任公司 | Load discharge circuit suitable for power supply system |
| US20170237469A1 (en) * | 2014-05-09 | 2017-08-17 | The Board Of Trustees Of The Leland Standford Junior University | Short range wireless communication |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110071742A (en) * | 2019-06-04 | 2019-07-30 | 福州优朋电子有限公司 | A kind of low-power consumption short distance half-duplex Power Carrier telecommunication circuit and communication means |
| CN110071742B (en) * | 2019-06-04 | 2023-11-28 | 福州优朋电子有限公司 | Low-power-consumption near-distance half-duplex power supply carrier communication circuit and communication method |
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| Publication number | Publication date |
|---|---|
| CN108322239B (en) | 2024-04-16 |
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