CN109981504B - Communication method, communication device, computer equipment and storage medium - Google Patents
Communication method, communication device, computer equipment and storage medium Download PDFInfo
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- CN109981504B CN109981504B CN201910144650.6A CN201910144650A CN109981504B CN 109981504 B CN109981504 B CN 109981504B CN 201910144650 A CN201910144650 A CN 201910144650A CN 109981504 B CN109981504 B CN 109981504B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
- H04L25/40—Transmitting circuits; Receiving circuits
- H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
- H04L25/4902—Pulse width modulation; Pulse position modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- Spectroscopy & Molecular Physics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The invention provides a communication method, which comprises the steps of receiving a first signal, wherein the first signal comprises a Pulse Width Modulation (PWM) signal and a data signal superposed on the high level of the PWM signal; filtering out the PWM signal in the first signal to obtain the data signal superposed on the high level of the PWM signal; and converting the high level and the low level in the obtained data signal into digital signals for processing. The communication method provided by the invention can save system resources and reduce the complexity of the system.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a communication method, apparatus, and computer device system storage medium.
Background
At present, electric automobiles are increasing continuously, and the electric automobiles drive vehicles to run through electric power. The user uses to fill electric pile and charges for electric automobile. In the charging process, the charging pile and the electric vehicle perform handshaking, charging confirmation, current control or other simple information interaction, and other data communication cannot be performed under the condition that communication modules and interfaces such as Bluetooth are not added.
Disclosure of Invention
The invention provides a communication method, a communication device, computer equipment and a storage medium, which can enable a charging pile and an electric vehicle to carry out data communication except simple interaction such as handshaking, charging confirmation or current control under the condition of not increasing communication modules and interfaces such as Bluetooth.
In order to achieve the above object, a first aspect of the present invention provides a method of: receiving a first signal, wherein the first signal comprises a Pulse Width Modulation (PWM) signal and a data signal superposed on a high level of the PWM signal, and the data signal consists of a high level and a low level; filtering out the PWM signal in the first signal to obtain the data signal superposed on the high level of the PWM signal; and converting the high level and the low level in the obtained data signal into digital signals for processing.
A second aspect of the present invention provides a communication apparatus, the apparatus comprising: a receiving circuit for receiving a first signal, the first signal comprising a Pulse Width Modulation (PWM) signal and a data signal superimposed on a high level of the PWM signal, the data signal consisting of a high level and a low level; the filtering circuit is used for filtering the PWM signal in the first signal to obtain the data signal superposed on the high level of the PWM signal; and the conversion circuit is used for converting the high level and the low level in the obtained data signal into digital signals for processing.
A third aspect of the invention provides a computer apparatus comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the computer program to cause the computer apparatus to perform the steps of the method of the first aspect.
A fourth aspect of the present invention provides a computer-readable storage medium having stored thereon a computer program, the computer-readable storage medium having stored thereon the computer program for use in the computer apparatus of the third aspect.
The invention has the beneficial effects that:
the invention provides a communication method, a communication device, computer equipment and a storage medium, which can enable a charging pile and an electric vehicle to communicate other data except for operations such as handshaking, charging confirmation or current control without adding communication modules and interfaces such as Bluetooth and the like, save system resources and reduce the complexity of a system.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of the present invention.
Fig. 1 is a flowchart illustrating a communication method according to an embodiment of the present invention;
fig. 2 is a schematic signal diagram of a communication method according to an embodiment of the present invention;
fig. 3 is a schematic signal processing diagram of a communication method according to an embodiment of the present invention;
fig. 4 is a signal processing diagram of another communication method according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a communication device according to a second embodiment of the present invention;
fig. 6 is a schematic structural diagram of a computer device according to a third embodiment of the present invention;
fig. 7 is a schematic connection diagram of a storage medium according to a fourth embodiment of the present invention.
Detailed Description
Various embodiments of the present invention will be described more fully hereinafter. The invention is capable of various embodiments and of modifications and variations therein. However, it should be understood that: there is no intention to limit various embodiments of the invention to the specific embodiments disclosed herein, but on the contrary, the intention is to cover all modifications, equivalents, and/or alternatives falling within the spirit and scope of various embodiments of the invention.
Hereinafter, the terms "includes" or "may include" used in various embodiments of the present invention indicate the presence of the disclosed functions, operations, or elements, and do not limit the addition of one or more functions, operations, or elements. Furthermore, as used in various embodiments of the present invention, the terms "comprises," "comprising," "includes," "including," "has," "having" and their derivatives are intended to mean that the specified features, numbers, steps, operations, elements, components, or combinations of the foregoing, are only meant to indicate that a particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be construed as first excluding the existence of, or adding to the possibility of, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
In various embodiments of the invention, the expression "a or/and B" includes any or all combinations of the words listed simultaneously, e.g., may include a, may include B, or may include both a and B.
Expressions (such as "first", "second", and the like) used in various embodiments of the present invention may modify various constituent elements in various embodiments, but may not limit the respective constituent elements. For example, the above description does not limit the order and/or importance of the elements described. The foregoing description is for the purpose of distinguishing one element from another. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present invention.
It should be noted that: in the present invention, unless otherwise explicitly stated or defined, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; there may be communication between the interiors of the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, it should be understood by those skilled in the art that the terms indicating an orientation or a positional relationship herein are based on the orientations and the positional relationships shown in the drawings and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation and operate, and thus, should not be construed as limiting the present invention.
The terminology used in the various embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the invention. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention.
Referring to fig. 1, fig. 1 shows a communication method according to a first embodiment of the present invention, where the method includes:
Specifically, when the electrical connection state between the charging pile and the electric vehicle is an unconnected state, the voltage range of the high voltage is (11.2, 12.8); when the electric connection state between the charging pile and the electric automobile is a connected state, the voltage range of the high voltage is (8.2, 9.8); when the electric connection state between the charging pile and the electric vehicle is a charging state, the voltage range of the high voltage is (5.2, 6.8). The redundant voltage is 1.6V, i.e., a difference of 12.8 and 11.2, a difference of 9.8 and 8.2, and a difference of 6.8 and 5.2. Further, a detection range may be set for an upper limit voltage and a lower limit voltage of the voltage range. As shown in fig. 2, taking the voltage range (5.2,6.8) as an example, since the ripple noise is generally 1% of the signal level, the voltage range greater than 12.8 × 1% to 0.128V, such as 0.2V, can be set for preventing noise interference, the voltage range (5.2,5.4) can be set for detecting and determining that the detected voltage belongs to a low level for transmitting the data signal, that is, when the detected voltage belongs to (5.2,5.4), the detected voltage is determined to be the low level, and the voltage range (6.6,6.8) is set for detecting and determining that the detected voltage belongs to a high level for transmitting the data signal.
And 120, filtering the PWM signal in the first signal to obtain the data signal superimposed on the high level of the PWM signal.
The filtering out the PWM signal in the first signal to obtain the data signal superimposed on the high level of the PWM signal includes: filtering a data signal superposed on the high level of the PWM signal in the first signal to obtain a second signal; turning the high level of the second signal to a low level, and turning the low level of the second signal to a high level to obtain a third signal; and operating the third signal and the first signal to obtain the data signal. Specifically, as shown in fig. 3, the voltage signal 301 shows the first signal including the PWM signal and the data signal superimposed on the high level of the PWM signal. Further, the voltage signal 302 shows the second signal, which is the first signal after the data signal superimposed on the high level of the PWM signal is filtered out. Voltage signal 303 shows a third signal obtained by inverting the high level and the low level of voltage signal 302. Operator 305 shows that anding the first signal 301 with the third signal 303 results in the data signal 304 described above.
Optionally, the data signal may be transmitted through the at least two voltage ranges, respectively; the filtering out the PWM signal in the first signal to obtain the data signal superimposed on the high level of the PWM signal includes: respectively filtering the PWM signals in the at least two voltage ranges to obtain data signals transmitted in the at least two voltage ranges; and-computing the data signals respectively transmitted in the at least two voltage ranges to obtain the data signal superposed on the high level of the PWM signal. Specifically, as shown in fig. 4, the data signals may be transmitted through three voltage ranges, respectively, where the three voltage ranges may be: (11.2,12.8), (8.2,9.8), or (5.2,6.8), respectively correspond to three connection states of the charging pile and the electric vehicle. Signal flow 401 represents a first portion of the data signal conveyed over a voltage range (11.2,12.8), signal flow 402 represents a second portion of the data signal conveyed over a voltage range (8.2,9.8), and signal flow 403 represents a third portion of the data signal conveyed over a voltage range (5.2, 6.8). The signal stream 401, the signal stream 402, or the signal stream 403 respectively obtain the first partial signal 405, the second partial signal 406, and the third partial signal 407 by filtering out the data signal superimposed on the high level of the PWM signal, inverting the high level and the low level, and performing an and operation with the original first signal 404. The operations of filtering, level inversion and anding can be referred to the above description.
Further, since the three voltage ranges correspond to three different connection states of the charging pile and the electric vehicle, the obtained first partial signal 405, second partial signal 406, and third partial signal 407 may be subjected to and operation 408 to obtain the data signal 409 superimposed on the high level of the PWM signal.
Illustratively, the above-mentioned filtering of the PWM signal in the first signal may be implemented by a decision circuit, and if the input exceeds a level of 12V, a level of 12V is output. The signal inversion can be performed by a voltage inverting circuit.
For example, a high level in the obtained data signal may be converted into a digital signal "1", and a low level may be converted into a digital signal "0".
The invention provides a communication method, which can enable a charging pile and an electric vehicle to communicate other data except for operations such as handshaking, charging confirmation or current control without adding communication modules and interfaces such as Bluetooth and the like, saves system resources and reduces the complexity of a system.
Referring to fig. 5, fig. 5 shows a communication device according to a second embodiment of the present invention, where the communication device includes:
a receiving circuit 501, configured to receive a first signal, where the first signal includes a Pulse Width Modulation (PWM) signal and a data signal superimposed on a high level of the PWM signal, and the data signal includes a high level and a low level; a filtering circuit 502, configured to filter a PWM signal in the first signal to obtain the data signal superimposed on the high level of the PWM signal; a conversion circuit 503, configured to convert the high level and the low level in the obtained data signal into digital signals for processing.
The data signal superimposed on the high level of the PWM signal is transmitted using a redundant voltage of the PWM signal, the redundant voltage including a voltage range of the high level of the PWM signal or a portion of the voltage range including the high level of the PWM signal.
The voltage range of the high level of the PWM signal includes at least two voltage ranges. Specifically, the voltage range of the high level of the PWM signal includes: (11.2,12.8), (8.2,9.8), or (5.2, 6.8).
Optionally, the apparatus further includes a detection circuit, and the detection circuit is configured to detect an upper limit voltage and a lower limit voltage of the voltage range according to a set detection range.
Optionally, the filtering circuit includes a filtering sub-circuit, an inverting circuit, and a cloud computing circuit, where the filtering sub-circuit is configured to filter a data signal superimposed on the high level of the PWM signal in the first signal to obtain a second signal; the flip circuit is used for flipping the high level of the second signal into a low level and flipping the low level of the second signal into a high level to obtain a third signal; and the cloud operation circuit is used for performing AND operation on the third signal and the first signal to obtain the data signal.
The apparatus further comprises a transmission circuit for transmitting the data signal through the at least two voltage ranges, respectively; the filtering circuit comprises a shunt filtering sub-circuit and a shunt cloud computing circuit, wherein the shunt filtering sub-circuit is used for respectively filtering the PWM signals in the at least two voltage ranges to obtain data signals transmitted in the at least two voltage ranges; and the shunt cloud operation circuit is used for performing AND operation on the data signals respectively transmitted in the at least two voltage ranges to obtain the data signal superposed on the high level of the PWM signal.
For other functions or other functional descriptions of a communication device provided by the first embodiment of the present invention, reference may be made to the relevant description in the first embodiment of the present invention.
The communication device provided by the embodiment of the invention can enable the charging pile and the electric vehicle to communicate other data except for operations such as handshaking, charging confirmation or current control without adding communication modules and interfaces such as Bluetooth and the like, so that system resources are saved, and the complexity of the system is reduced.
An embodiment of the present invention further provides a computer device 600, as shown in fig. 6, where the computer device includes: a memory 610, a processor 620 and a program stored on the memory and operable on the processor to execute the charging method, the processor executes the computer program to make the computer device 600 execute the charging method in the first embodiment. For other functions of the computer device 600, reference may be made to the description in the first embodiment, and further description is omitted here. The computer device 600 may be a server or a cloud platform.
A storage medium 710 is further provided in a fourth embodiment of the present invention, as shown in fig. 7, where the program of the charging method in the third embodiment is stored on the storage medium, and when executed by the processor 720, the program of the charging method implements the steps of the charging method in the first embodiment. The charging method can refer to the above embodiments, and details are not repeated herein.
The computer equipment and the computer readable storage medium provided by the invention can enable the charging pile and the electric vehicle to communicate other data except for the operations of handshaking, charging confirmation, current control and the like without adding communication modules and interfaces such as Bluetooth and the like, thereby saving system resources and reducing the complexity of the system.
In all examples shown and described herein, any particular value should be construed as merely exemplary, and not as a limitation, and thus other examples of example embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and bus dynamic RAM (RDRAM).
The above examples are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, other various changes and modifications can be made according to the above-described technical solutions and concepts, and all such changes and modifications should fall within the protection scope of the present invention.
Claims (14)
1. A communication method for charging between an electric automobile and a charging pile is characterized by comprising the following steps:
receiving a first signal, wherein the first signal comprises a Pulse Width Modulation (PWM) signal and a data signal superposed on a high level of the PWM signal, and the data signal consists of a high level and a low level; the data signal superimposed on the high level of the PWM signal is transmitted using a redundant voltage of the PWM signal, the redundant voltage including a voltage range of the high level of the PWM signal or a portion of the voltage range including the high level of the PWM signal;
filtering out the PWM signal in the first signal to obtain the data signal superposed on the high level of the PWM signal;
and converting the high level and the low level in the obtained data signal into digital signals for processing.
2. The method of claim 1, wherein the voltage range of the high level of the PWM signal comprises at least two voltage ranges.
3. The method of claim 1,
the voltage range of the high level of the PWM signal includes:
(11.2,12.8), (8.2,9.8), or (5.2, 6.8).
4. The method of claim 3, further comprising: setting a detection range for an upper limit voltage and a lower limit voltage of the voltage range.
5. The method of claim 1, wherein the filtering out the PWM signal from the first signal to obtain the data signal superimposed on the high level of the PWM signal comprises: filtering a data signal superposed on the high level of the PWM signal in the first signal to obtain a second signal;
turning the high level of the second signal to a low level, and turning the low level of the second signal to a high level to obtain a third signal;
and operating the third signal and the first signal to obtain the data signal.
6. The method of claim 2, further comprising: the data signals are transmitted through the at least two voltage ranges respectively;
the filtering out the PWM signal in the first signal to obtain the data signal superimposed on the high level of the PWM signal includes: respectively filtering the PWM signals in the at least two voltage ranges to obtain data signals transmitted in the at least two voltage ranges;
and-computing the data signals respectively transmitted in the at least two voltage ranges to obtain the data signal superposed on the high level of the PWM signal.
7. A communication device for charging between an electric vehicle and a charging pile, the device comprising: a receiving circuit for receiving a first signal, the first signal comprising a Pulse Width Modulation (PWM) signal and a data signal superimposed on a high level of the PWM signal, the data signal consisting of a high level and a low level; the data signal superimposed on the high level of the PWM signal is transmitted using a redundant voltage of the PWM signal, the redundant voltage including a voltage range of the high level of the PWM signal or a portion of the voltage range including the high level of the PWM signal;
the filtering circuit is used for filtering the PWM signal in the first signal to obtain the data signal superposed on the high level of the PWM signal;
and the conversion circuit is used for converting the high level and the low level in the obtained data signal into digital signals for processing.
8. The apparatus of claim 7, wherein the voltage range of the high level of the PWM signal comprises at least two voltage ranges.
9. The apparatus of claim 7, wherein the voltage range of the high level of the PWM signal comprises:
(11.2,12.8), (8.2,9.8), or (5.2, 6.8).
10. The apparatus of claim 9, further comprising a detection circuit for detecting an upper limit voltage and a lower limit voltage of the voltage range according to a set detection range.
11. The apparatus according to claim 7, wherein the filtering circuit comprises a filtering sub-circuit, an inverting circuit and a cloud computing circuit, and the filtering sub-circuit is configured to filter a data signal superimposed on a high level of the PWM signal in the first signal to obtain a second signal;
the flip circuit is used for flipping the high level of the second signal into a low level and flipping the low level of the second signal into a high level to obtain a third signal;
and the cloud operation circuit is used for performing AND operation on the third signal and the first signal to obtain the data signal.
12. The apparatus of claim 8, further comprising a transmission circuit for transmitting the data signal through the at least two voltage ranges, respectively;
the filtering circuit comprises a shunt filtering sub-circuit and a shunt cloud computing circuit, wherein the shunt filtering sub-circuit is used for respectively filtering the PWM signals in the at least two voltage ranges to obtain data signals transmitted in the at least two voltage ranges;
and the shunt cloud operation circuit is used for performing AND operation on the data signals respectively transmitted in the at least two voltage ranges to obtain the data signal superposed on the high level of the PWM signal.
13. A computer device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor executing the computer program to cause the computer device to perform the steps of the method of any one of claims 1-6.
14. A computer-readable storage medium on which a computer program is stored, characterized in that the computer-readable storage medium stores the computer program used in the computer device of claim 13.
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