CN115833378A - System for simultaneously realizing power supply and full duplex communication by utilizing double wires - Google Patents
System for simultaneously realizing power supply and full duplex communication by utilizing double wires Download PDFInfo
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- CN115833378A CN115833378A CN202211539388.3A CN202211539388A CN115833378A CN 115833378 A CN115833378 A CN 115833378A CN 202211539388 A CN202211539388 A CN 202211539388A CN 115833378 A CN115833378 A CN 115833378A
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Abstract
The application discloses a system for simultaneously realizing power supply and full-duplex communication by utilizing double wires, which comprises a power supply part and a power receiving part; the power supply part comprises a power supply source, a power supply end controller, a power supply end signal modulation module and a power supply end receiving and demodulating module, wherein the power supply end signal modulation module is respectively connected with the power supply end controller and the power supply source, and the power supply end receiving and demodulating module is respectively connected with the power supply end controller and the power supply source; the power receiving part comprises a power receiving end receiving demodulation module, a power receiving end signal modulation module, a power receiving end controller and a power supply filter voltage stabilizer, wherein the power receiving end signal modulation module is connected with the power receiving end controller, and the power receiving end receiving demodulation module is connected with the power receiving end controller; the power supply end signal modulation module and the power supply end receiving demodulation module are connected with the power receiving end receiving demodulation module, the power receiving end signal modulation module and the power supply filter voltage stabilizer in a wired mode. The power supply and communication problems of different modules in the equipment with larger wiring difficulty and small wiring space are solved.
Description
Technical Field
The application relates to the technical field of communication control, in particular to a system for simultaneously realizing power supply and full-duplex communication by utilizing double wires.
Background
The communication control field relates to the fields of industrial equipment, household appliances and the like. With the development of the related technologies, the related industries have higher and higher requirements on communication technologies. Especially for miniaturized household appliances or robots, the wiring space is limited and the difficulty is high. In the prior art, it is conventional to arrange power lines and signal lines (at least 3 to 4 lines are required) for power supply and communication, but a large number of wires cannot meet the application requirements of such miniaturized products. Meanwhile, the conventional modulation mode of two-wire communication can only realize half-duplex communication or time-sharing communication, and cannot realize real full-duplex simultaneous communication.
Disclosure of Invention
An object of the application is to provide a system for realizing power supply and full duplex communication simultaneously by utilizing double wires, and the power supply and communication problems of different modules in equipment with larger wiring difficulty and small wiring space are solved.
In order to achieve the above purpose, the present application discloses the following technical solutions: a system for simultaneously realizing power supply and full duplex communication by using double wires comprises a power supply part and a power receiving part;
the power supply part comprises a power supply source, a power supply end controller, a power supply end signal modulation module and a power supply end receiving and demodulating module, wherein the power supply end signal modulation module is respectively connected with the power supply end controller and the power supply source, and the power supply end receiving and demodulating module is respectively connected with the power supply end controller and the power supply source;
the power receiving part comprises a power receiving end receiving demodulation module, a power receiving end signal modulation module, a power receiving end controller and a power supply filter voltage stabilizer, wherein the power receiving end signal modulation module is connected with the power receiving end controller, and the power receiving end receiving demodulation module is connected with the power receiving end controller;
the power supply end signal modulation module and the power supply end receiving demodulation module are all in wired connection with the power receiving end receiving demodulation module, the power receiving end signal modulation module and the power supply filter voltage stabilizer.
Preferably, the operating method of the system for simultaneously implementing power supply and full duplex communication by using two wires comprises the following steps:
the power supply part carries out energy transmission through high-frequency pulse width modulation square waves;
when the power supply part needs to transmit signals to the power receiving part, the power supply end signal modulation module of the power supply part modulates low-frequency communication signals into a high-frequency power supply through the power supply end controller, the power receiving end signal modulation module of the power receiving end samples and demodulates the signals through the power receiving end controller to realize communication, and the high-frequency power supply enters the power supply filter voltage stabilizer to be filtered and reduced in voltage to provide stable power supply for the power receiving part;
when the power receiving part needs to transmit signals to the power supply part, the power receiving part modulates the signals into high-frequency pulse width square waves and converts the high-frequency pulse width square waves into current signals, and the power supply terminal receiving and demodulating module of the power supply part realizes communication through sampling and demodulating the current signals.
Preferably, the power receiving unit further includes a backup power supply or a super capacitor configured to maintain power supply stability for the power receiving device and to implement power outage data saving.
Has the beneficial effects that:
the system for simultaneously realizing power supply and full-duplex communication by utilizing the double wires only directly performs electrical connection through two wires connected between the power supply part and the power receiving part (or one wire is matched with the metal equipment shell to perform electrical connection as an equivalent wire), so that simultaneous power supply and communication can be realized, and the wiring difficulty in small and miniature equipment is reduced. Through the signal transmission between power supply portion and the portion that receives power, realized full duplex communication, both ends equipment communication is more convenient, and signal transmission need not to wait. The signal transmission of the powered device is realized by modulating into current, so that the interference caused by power supply fluctuation can be effectively avoided; the powered device is used for filtering and then reducing the voltage of a higher voltage after power is received, so that more stable power supply can be realized, and the influence on power supply caused by communication is reduced. In some small-size equipment's application, need to use the electric slip ring in the omnidirectional joint of small-size robot for example, and the electric slip ring needs the route that passes through more, and the volume is just bigger just more, and the cost also can be higher, and through the system that utilizes the double-wire to realize power supply and full duplex communication simultaneously of this application, can effectual reduction communication and the circuit of power supply, and then reduce the volume of joint effectively, reduce cost.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a block diagram of a system for implementing power supply and full duplex communication simultaneously by using two wires according to an embodiment of the present application;
FIG. 2 is a loop topology of a system for implementing power supply and full duplex communication simultaneously using two wires according to an embodiment of the present application;
FIG. 3 is a schematic circuit diagram of a power receiving unit according to an embodiment of the present disclosure;
FIG. 4 is a schematic circuit diagram of a power supply unit according to an embodiment of the present invention;
FIG. 5 is a waveform diagram of signal transmission in an embodiment of the present application;
fig. 6 is a schematic diagram of a multi-channel transmission design in the embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
In the description of the present disclosure, it should be noted that the term "comprises/comprising" in this document is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of another like element in a process, method, article, or apparatus that comprises the element.
Examples
A system for simultaneously implementing power supply and full duplex communication using two wires as shown in fig. 1 includes a power supply portion and a power receiving portion.
The power supply part comprises a power supply source, a power supply end controller, a power supply end signal modulation module and a power supply end receiving and demodulating module, wherein the power supply end signal modulation module is respectively connected with the power supply end controller and the power supply source, and the power supply end receiving and demodulating module is respectively connected with the power supply end controller and the power supply source.
The power receiving part comprises a power receiving end receiving demodulation module, a power receiving end signal modulation module, a power receiving end controller and a power supply filter voltage stabilizer, wherein the power receiving end signal modulation module is connected with the power receiving end controller, and the power receiving end receiving demodulation module is connected with the power receiving end controller.
The power supply end signal modulation module and the power supply end receiving demodulation module are connected with the power receiving end receiving demodulation module, the power receiving end signal modulation module and the power supply filtering voltage stabilizer in a wired mode. As shown in fig. 2, only two wires are electrically connected between the power supply portion and the power receiving portion, and it should be noted that the wires may be real wires or equivalent wires composed of product metal shells. The structures of the power supply unit and the power receiving unit are shown in fig. 3 and 4, respectively.
Based on the above, the power supply unit applies the high-frequency pwm wave to perform power supply and signal modulation, the power receiving unit filters and reduces the voltage of the pwm wave after performing signal demodulation, so as to supply power to the power receiving equipment, and the power receiving unit modulates the current signal with the signal and superimposes the modulated current signal in the quiescent operating current to transmit the modulated current signal to the power supply equipment. Because the voltage and current signals of the flashlight device are relatively independent, the signals can be transmitted simultaneously, and therefore full-duplex communication is achieved. Meanwhile, in this embodiment, the powered device may additionally add a capacitor or a battery to maintain stability of power supply and implement power-off data saving.
In a non-communication state, the power supply unit outputs a high-frequency pulse width modulation wave as a power supply to supply power to the power receiving terminal controller (the voltage waveform is shown in fig. 5 a), and after receiving the high-frequency power supply, the power receiving terminal controller performs filtering through an RC or RLC or other similar filters, and then performs voltage reduction through a linear regulator or a DCDC circuit to supply power to the power receiving device.
When the power supply unit transmits and the power receiving unit receives, the power supply unit modulates the bit signal to be transmitted into the high-frequency power supply signal (the voltage waveform is shown in fig. 5 b) by the frequency modulation or amplitude modulation technology through the controller (such as a single chip microcomputer, an FPGA, a CPLD, a DSP, a computer, a PLC, and the like). The equivalent voltage of the power supply is decreased to a certain extent when bit0 is transmitted, and the duty ratio of the high frequency power supply signal can be adjusted appropriately when bit0 is transmitted (as shown in fig. 5 c) in order to maintain the stability of the power supply. After receiving the signal, the power receiving unit first performs voltage sampling or direct pulse width capture on the signal, and analyzes and processes information contained in the high-frequency power supply signal by using a power receiving end controller (such as a single chip microcomputer, an FPGA, a CPLD, a DSP, a computer, a PLC, and the like). And then the signal enters a filter and is subjected to linear voltage stabilization or DCDC voltage reduction to serve as power supply of the power receiving equipment.
When the power receiving portion transmits a signal and the power supplying portion receives the signal, the power receiving portion needs to modulate the transmitted signal into a current. For example, one or more controllable resistors are connected in parallel at the power receiving port, and the signal current is superimposed into the working current (the current waveform may be as shown in fig. 5d or fig. 5e according to the voltage input at this time). The power supply part needs to sample the current signal, and the current working current and the transmitted signal can be demodulated through sampling the current, so that the signal receiving and the equipment protection are completed. The additional current generated by different resistors connected in parallel is different, so that the number of data bits transmitted simultaneously is equal to that of the controllable resistor loop, and the actually connected resistor can be distinguished by detecting the additional current value. For example, four resistors capable of controlling the parallel connection of the switches are designed, and when the resistors are turned on, the current of the resistor R1 is 0.05A, the current of the resistor R2 is 0.1A, the current of the resistor R3 is 0.2A, and the current of the resistor R4 is 0.4A (as shown in fig. 6), the normal operating current is subtracted from the current detected by the power supply terminal at this time, and which resistors the current passes through at this time is determined. If the current is 0.15A, the state that R1 and R2 are switched on is shown; if the current is 0.75, all of R1, R2, R3, and R4 are in an on state, and so on, whether the switches corresponding to the four resistors are opened can be determined by the current. Thereby transmitting 4 bits of information at the same time, and greatly improving the transmission efficiency.
The above two signal transmission processes do not conflict with each other and can be performed simultaneously. Thus, the apparatus herein may enable stable full-duplex device communication.
In summary, the working method of the system for simultaneously implementing power supply and full duplex communication by using two wires according to the present application includes:
the power supply part carries out energy transmission through high-frequency pulse width modulation square waves;
when the power supply part needs to transmit signals to the power receiving part, a power supply end signal modulation module of the power supply part modulates low-frequency communication signals into a high-frequency power supply through a power supply end controller, a power receiving end signal modulation module of the power receiving end samples and demodulates the signals through the power receiving end controller to realize communication, and the high-frequency power supply enters a power supply filter voltage stabilizer to be filtered and reduced in voltage to provide stable power supply for the power receiving part;
when the power receiving part needs to transmit signals to the power supply part, the power receiving part modulates the signals into high-frequency pulse width square waves and converts the signals into current signals, and the power supply end receiving and demodulating module of the power supply part realizes communication through sampling and demodulating the current signals.
Finally, it should be noted that: although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the present application.
Claims (3)
1. A system for realizing power supply and full duplex communication simultaneously by utilizing double wires is characterized by comprising a power supply part and a power receiving part;
the power supply part comprises a power supply source, a power supply end controller, a power supply end signal modulation module and a power supply end receiving demodulation module, wherein the power supply end signal modulation module is respectively connected with the power supply end controller and the power supply source, and the power supply end receiving demodulation module is respectively connected with the power supply end controller and the power supply source;
the power receiving part comprises a power receiving end receiving demodulation module, a power receiving end signal modulation module, a power receiving end controller and a power supply filter voltage stabilizer, wherein the power receiving end signal modulation module is connected with the power receiving end controller, and the power receiving end receiving demodulation module is connected with the power receiving end controller;
the power supply end signal modulation module and the power supply end receiving demodulation module are all in wired connection with the power receiving end receiving demodulation module, the power receiving end signal modulation module and the power supply filter voltage stabilizer.
2. The system for implementing power supply and full duplex communication simultaneously by using two wires as claimed in claim 1, wherein the operating method of the system for implementing power supply and full duplex communication simultaneously by using two wires comprises:
the power supply part carries out energy transmission through high-frequency pulse width modulation square waves;
when the power supply part needs to transmit signals to the power receiving part, the power supply end signal modulation module of the power supply part modulates low-frequency communication signals into a high-frequency power supply through the power supply end controller, the power receiving end signal modulation module of the power receiving end samples and demodulates the signals through the power receiving end controller to realize communication, and the high-frequency power supply enters the power supply filter voltage stabilizer to be filtered and reduced in voltage to provide stable power supply for the power receiving part;
when the power receiving part needs to transmit signals to the power supply part, the power receiving part modulates the signals into high-frequency pulse width square waves and converts the high-frequency pulse width square waves into current signals, and the power supply terminal receiving and demodulating module of the power supply part realizes communication through sampling and demodulating the current signals.
3. The system of claim 1, wherein the power receiving portion further comprises a backup power source or a super capacitor configured to maintain stable power supply and save power outage data for the power receiving device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211539388.3A CN115833378A (en) | 2022-12-02 | 2022-12-02 | System for simultaneously realizing power supply and full duplex communication by utilizing double wires |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211539388.3A CN115833378A (en) | 2022-12-02 | 2022-12-02 | System for simultaneously realizing power supply and full duplex communication by utilizing double wires |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1279832A (en) * | 1997-09-23 | 2001-01-10 | 亨特技术股份有限公司 | Low frequency bilateral communication over power distribution lines |
| CN102185638A (en) * | 2011-04-25 | 2011-09-14 | 中国电力科学研究院 | Power line carrier and two-way power frequency communication mixing networking method |
| US20130044827A1 (en) * | 2011-08-16 | 2013-02-21 | Broadcom Corporation | Communications Via Power Line and a Hardware Implementation |
| CN212850496U (en) * | 2020-09-27 | 2021-03-30 | 云南电网有限责任公司德宏供电局 | Power line carrier communication device of circuit breaker detection system |
-
2022
- 2022-12-02 CN CN202211539388.3A patent/CN115833378A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1279832A (en) * | 1997-09-23 | 2001-01-10 | 亨特技术股份有限公司 | Low frequency bilateral communication over power distribution lines |
| CN102185638A (en) * | 2011-04-25 | 2011-09-14 | 中国电力科学研究院 | Power line carrier and two-way power frequency communication mixing networking method |
| US20130044827A1 (en) * | 2011-08-16 | 2013-02-21 | Broadcom Corporation | Communications Via Power Line and a Hardware Implementation |
| CN212850496U (en) * | 2020-09-27 | 2021-03-30 | 云南电网有限责任公司德宏供电局 | Power line carrier communication device of circuit breaker detection system |
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