CN109194893B - Power supply communication control circuit and power supply communication system - Google Patents
Power supply communication control circuit and power supply communication system Download PDFInfo
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- CN109194893B CN109194893B CN201810996786.5A CN201810996786A CN109194893B CN 109194893 B CN109194893 B CN 109194893B CN 201810996786 A CN201810996786 A CN 201810996786A CN 109194893 B CN109194893 B CN 109194893B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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Abstract
The invention discloses a power supply communication control circuit and a power supply communication system, and relates to the technical field of hardware. In the embodiment of the invention, through setting the power supply communication control circuit, when the fact that the power supply equipment can communicate with the external communication equipment is determined, the communication function between the power supply equipment and the external communication equipment is started, so that under the condition that the power supply equipment has a power interface but does not have the communication interface, the communication between the power supply equipment and the external communication equipment can still be realized, namely the power interface of the power supply equipment can realize the function of the communication interface, and the normal power supply of the power supply equipment cannot be influenced, thereby greatly widening the application range of the power supply equipment.
Description
Technical Field
The present invention relates to the field of hardware technologies, and in particular, to a power supply communication control circuit and a power supply communication system.
Background
The current video camera is generally provided with a power interface for inputting an external power supply and providing power for the video camera. The camera is also typically provided with a communication module within the camera that can provide the communication interface functionality. However, in general, the camera is usually provided with only a power interface to the outside, but not with a communication interface to the outside, and if the camera is to realize a communication function, the communication interface function of the internal communication module needs to be utilized, and the communication interface is led out through a wire, so that the camera needs to be disassembled, so that the operation process is complex, and the camera is easily damaged.
Therefore, how to set a communication interface of the camera to realize the communication function of the camera is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The embodiment of the invention provides a power supply communication control circuit and a power supply communication system, which are used for realizing communication between power supply equipment and external communication equipment under the condition that the power supply equipment is provided with a power interface but not provided with a communication interface.
The embodiment of the invention provides a power supply communication control circuit, which comprises: the device comprises an auxiliary processing module, a signal analysis module and a signal coupling module;
the auxiliary processing module is connected with a power interface of a power-supplied device, and the signal analysis module and the signal coupling module are respectively connected between the power interface and the signal processing module of the power-supplied device; the signal analysis module is also connected with the signal coupling module;
the auxiliary processing module is used for outputting a direct-current voltage signal to the power interface when the powered device and the external communication device are in a non-communication period; when the powered device and the external communication device are in a communication period, outputting a first power supply signal to the power supply interface, receiving a second power supply signal transmitted by the power supply interface, analyzing second communication information and sending the second communication information to the external communication device; the first power signal carries first communication information sent by the external communication equipment to the powered equipment, and the second power signal carries second communication information sent by the powered equipment to the external communication equipment;
the signal analysis module is used for receiving and analyzing the first power supply signal transmitted by the power supply interface and transmitting the analyzed first communication information to the signal processing module for processing; and providing the analyzed power supply signal to the signal coupling module;
the signal coupling module is configured to couple the second communication information output by the signal processing module with the power signal provided by the signal analysis module to form the second power signal, and output the second power signal to the power interface.
Through the setting to power supply communication control circuit, when confirming that can communicate between by power supply unit and the external communication equipment, open the communication function between by power supply unit and the external communication equipment, thereby have power source and do not have under the condition of communication interface by power supply unit, still can realize by the communication between power supply unit and the external communication equipment, the function of communication interface can be realized by power source of power supply unit promptly, and can not influence by power supply unit's normal power supply, thereby the range of application by power supply unit has been widened greatly.
Optionally, the first power signal is a third-order level signal; the second power signal is a carrier signal.
Thus, two signals can be distinguished, and mutual interference is avoided.
Optionally, the signal analysis module is an AD sampling circuit.
The signal analysis module may also be other circuits that can implement the analysis function, and is not limited herein.
Optionally, the signal coupling module specifically includes: a coupling unit and a pull-down unit;
the first input end of the coupling unit is connected with the signal processing module, the second input end of the coupling unit is connected with the signal analysis module, the first output end of the coupling unit is connected with the pull-down unit, and the second output end of the coupling unit is connected with the power interface; the coupling unit is used for coupling the second communication information with the power supply signal analyzed by the signal analysis module, generating and outputting the second power supply signal;
the pull-down unit is used for stabilizing the second power supply signal output by the coupling unit.
Therefore, not only the coupling effect can be realized, but also the stability of the output second power supply signal can be ensured.
Optionally, the auxiliary processing module includes: the system comprises an auxiliary power supply interface connected with external power supply equipment, an auxiliary communication interface connected with the external communication equipment, a signal processing unit connected with the auxiliary communication interface, and a signal analysis unit and a signal generation unit which are connected between the power supply interface and the signal processing unit; the signal generating unit is also connected with the auxiliary power supply interface;
the signal generating unit is configured to, when receiving the first communication information, perform coupling processing on the first communication information and a power signal input by the external power supply device through the auxiliary power interface, generate a first processing power signal carrying the first communication information, and output the first processing power signal to the power interface; when the first communication information is not received, outputting a power supply signal input by the external power supply equipment through the auxiliary power supply interface to the power supply interface; the power supply signal input by the auxiliary power supply interface is a direct-current voltage signal;
the signal analysis unit is used for analyzing the second communication information from the second power supply signal and outputting the second communication information to the signal processing unit;
the signal processing unit is configured to output the first communication signal to the signal generating unit and output the second communication information to the external communication device through the auxiliary communication interface when it is determined that the powered device and the external communication device are in a communication period.
The effect on the signal generation unit can be understood as: according to a preset coding rule, first communication information input by external communication equipment is coded into a third-order level signal. The function of the signal analysis unit can be understood as: and analyzing the carrier signal according to a preset decoding rule. The effect on the signal processing unit can be understood as: and judging whether the power supply device and the external communication device are in a communication stage or not, outputting second communication information to the external communication device, and outputting first communication information to the signal generation unit.
Optionally, the signal analyzing unit specifically includes: the circuit comprises a comparator, a first resistance switching circuit, a signal input circuit and a control circuit;
the input end of the signal input circuit is connected with the power interface, and the output end of the signal input circuit is connected with the first input end of the comparator; the signal input circuit is used for inputting the second power supply signal to the comparator;
the input end of the first resistance switching circuit is connected with the auxiliary power supply interface, and the output end of the first resistance switching circuit is connected with the second input end of the comparator; the first resistance switching circuit is used for controlling the output of the comparator;
one end of the control circuit is connected with the second input end of the comparator, and the other end of the control circuit is connected with the output end of the comparator; the control circuit is used for controlling the output of the comparator;
the output end of the comparator is further connected with the signal processing unit and used for analyzing second communication information carried in the second power supply signal under the control of the control circuit and the first resistance switching circuit.
Therefore, the function of the signal analysis unit can be realized through a simple structure, and the manufacturing cost is reduced.
Optionally, the signal generating unit specifically includes: a general power supply circuit and a second resistance switching circuit;
the first input end of the general power supply circuit is connected with the auxiliary power supply interface, the second input end of the general power supply circuit is respectively connected with the second resistance switching circuit and the signal processing unit, and the output end of the general power supply circuit is connected with the power supply interface;
the universal power circuit is configured to output a power signal input through the auxiliary power interface under the control of the second resistance switching circuit and the signal processing unit, couple the first communication information output by the signal processing unit with the power signal input through the auxiliary power interface, and generate and output a first power signal carrying the first communication information.
Therefore, the function of the signal generating unit can be realized through a simple device, and the manufacturing cost is reduced.
Optionally, the voltage output by the output terminal of the general power supply circuit is the same as the voltage output by the comparator.
Optionally, the signal processing unit is a single chip microcomputer or a logic circuit.
Optionally, the auxiliary processing module is disposed outside the powered device;
the signal analysis module and the signal coupling module are both arranged inside the power supply device.
On the other hand, an embodiment of the present invention further provides a power supply communication system, including: a power-supplied device, and the above power supply communication control circuit provided in the embodiment of the present invention;
the power supply communication control circuit is used for providing a direct-current voltage signal for the power supply device through a power interface of the power supply device when the power supply device is in a non-communication period with an external communication device; when the powered device and the external communication device are in a communication period, processing first communication information input by the external communication device, transmitting the first communication information to the powered device through the power interface, processing second communication information output to the external communication device by the powered device, transmitting the second communication information through the power interface, performing secondary processing on the second communication information, and outputting the second communication information to the external communication device.
Optionally, the powered device is a video camera, a video camera or a still camera.
The invention has the following beneficial effects:
according to the power supply communication control circuit and the power supply communication system provided by the embodiment of the invention, through the setting of the power supply communication control circuit, when the fact that the supplied equipment can communicate with the external communication equipment is determined, the communication function between the supplied equipment and the external communication equipment is started, so that under the condition that the supplied equipment has a power interface but does not have the communication interface, the communication between the supplied equipment and the external communication equipment can still be realized, namely the power interface of the supplied equipment can realize the function of the communication interface, the normal power supply of the supplied equipment cannot be influenced, and the application range of the supplied equipment is greatly expanded.
Drawings
Fig. 1 is a schematic structural diagram of a power supply communication system provided in an embodiment of the present invention;
fig. 2 is a second schematic structural diagram of a power supply communication system according to an embodiment of the present invention;
FIG. 3 is a diagram of three-level signals according to an embodiment of the present invention;
fig. 4 is a third schematic structural diagram of a power supply communication system according to an embodiment of the present invention.
Detailed Description
A detailed description will be given below of specific embodiments of a power supply communication control circuit and a power supply communication system according to an embodiment of the present invention with reference to the accompanying drawings. It should be noted that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The powered device mentioned in the embodiment of the present invention may be a dc powered device, such as a video camera, or a still camera, and may also be other devices that are externally provided with a power interface but are not provided with a communication interface, and is not limited herein.
Through the setting to power supply communication control circuit, when confirming that can communicate between by power supply unit and the external communication equipment, open the communication function between by power supply unit and the external communication equipment, thereby have power source and do not have under the condition of communication interface by power supply unit, still can realize by the communication between power supply unit and the external communication equipment, the function of communication interface can be realized by power source of power supply unit promptly, and can not influence by power supply unit's normal power supply, thereby the range of application by power supply unit has been widened greatly.
The following describes the power supply communication control circuit provided in the embodiment of the present invention in detail.
Specifically, as shown in fig. 1 and fig. 2, a power supply communication control circuit m according to an embodiment of the present invention includes: a power interface 10 and a signal processing module 20. The power supply communication control circuit m may include: the signal analysis module 30, the signal coupling module 40 and the auxiliary processing module 50; the auxiliary processing module 50 is connected to the power interface 10 of the powered device n, and the signal analyzing module 30 and the signal coupling module 40 are respectively connected between the power interface 10 and the signal processing module 20 of the powered device n; the signal analysis module 30 is also connected with the signal coupling module 40;
the auxiliary processing module 50 is configured to output a dc voltage signal to the power interface 10 when the powered device n and the external communication device 60 are in a non-communication period; when the powered device n and the external communication device 60 are in a communication period, outputting a first power supply signal to the power supply interface 10, receiving a second power supply signal transmitted by the power supply interface 10, analyzing a second communication information, and sending the second communication information to the external communication device 60; the first power signal carries first communication information sent by the external communication equipment 60 to the powered equipment n, and the second power signal carries second communication information sent by the powered equipment n to the external communication equipment 60;
the signal analysis module 30 is configured to receive and analyze the first power signal transmitted by the power interface 10, and transmit the analyzed first communication information to the signal processing module 20 for processing; and providing the parsed power signal to the signal coupling module 40;
the signal coupling module 40 is configured to couple the second communication information output by the signal processing module 20 with the power signal provided by the signal analyzing module 30 to form a second power signal, and output the second power signal to the power interface 10.
It should be noted that, in the embodiment of the present invention, the modules included in the powered device n are not limited to those shown in fig. 1 and fig. 2, and may also include other modules that can cooperate to implement the powered device n, which may specifically refer to the prior art and are not described herein again.
In the embodiment of the present invention, as shown in fig. 2, the signal processing module 20 includes a communication unit 21 having a communication interface function, and the signal processing module 20 is connected to the signal coupling module 40 through the communication unit 21, so that the signal processing module 20 outputs the second communication information to the signal coupling module 40 through the communication unit 21. When the signal coupling module 40 performs the coupling process on the second communication information output by the communication unit 21, the second communication information output by the communication unit 21 is actually coupled to the power signal provided by the signal analysis module 30, and the second power signal is formed and output to the power interface 10. Therefore, the auxiliary processing module 50 is disposed at the power interface 10, and can separate and analyze the first communication information in the second power signal, and transmit the separated and analyzed first communication information to the external communication device 60, so as to implement transmission of the communication information.
Optionally, referring to fig. 2, the signal analyzing module 30 and the signal coupling module 40 may both be located inside the powered device n, and the auxiliary processing module 50 is disposed outside the powered device n and connected to the powered device n through the power interface 10; in this way, when the power-supplied device n communicates with the external communication device 60, the power-supplied device n does not need to be disconnected to draw out the communication line of the internal communication unit 21, and the power-supplied device n can be manufactured more easily and flexibly.
It should be noted that, for the signal analyzing module 30, when the signal transmitted through the power interface 10 is a third-order level signal, the power signal and the communication information can be analyzed from the third-order level signal, the communication information is output to the signal processing module 20, so that the signal processing module 20 processes the communication information, and the power signal is output to any one of the powered devices n, so as to provide power required by the operation for each module, and meet the normal operation of the powered device n. When the signal transmitted through the power interface 10 is a dc voltage signal, the signal analyzing module 30 may directly provide the dc voltage signal to any module inside the powered device n to satisfy the normal operation of each module.
The main functions of the auxiliary processing module 50 are two points: firstly, a communication function between the power-supplied device n and the external communication device 60 is started, so that the power-supplied device n can communicate with the external communication device 60; the second is to transmit the second communication information output by the power-supplied device n to the external communication device 60, and transmit the first communication information input by the external communication device 60 to the power-supplied device n.
Alternatively, in order to achieve the above-described effects of the auxiliary processing module 50, as shown in fig. 2, the auxiliary processing module 50 may include: an auxiliary power interface 54 connected to the external power supply device 70, an auxiliary communication interface 51 connected to the external communication device 60, a signal processing unit 55 connected to the auxiliary communication interface 51, and a signal analyzing unit 52 and a signal generating unit 53 connected between the power interface 10 and the signal processing unit 55; the signal generation unit 53 is also connected to an auxiliary power supply interface 54. In addition, in order to enable the auxiliary processing module 50 to operate normally, the auxiliary power interface 54 is further connected to the signal analyzing unit 52 and the signal processing unit 55, so as to provide operating power to the signal analyzing unit 52 and the signal processing unit 55.
In an implementation process, the signal generating unit 53 is configured to, when receiving the first communication information, perform coupling processing on the first communication information and a power signal input by the external power supply device 70 through the auxiliary power interface 54, generate a first processing power signal carrying the first communication information, and output the first processing power signal to the power interface 10; when the first communication information is not received, outputting a power supply signal input by the external power supply equipment 70 through the auxiliary power supply interface 54 to the power supply interface 10; the power supply signal input by the auxiliary power supply interface is a direct-current voltage signal;
the first power signal is generated according to a preset encoding rule, and the encoding rule and a preset decoding rule mentioned in the following are configured after negotiation is performed between the powered device n and the auxiliary processing module 50, so that the signal analyzing module 30 can accurately analyze the first communication information from the first power signal.
A signal analyzing unit 52 for analyzing the second communication information from the second power signal and outputting the second communication information to the signal processing unit 55;
a signal processing unit 55 for outputting the first communication signal to the signal generating unit 53 and outputting the second communication information to the external communication device 60 through the auxiliary communication interface 51 when it is judged that the power-supplied device n is in the communication period with the external communication device 60.
Specifically, when the method is implemented, a first power signal may be generated according to a preset encoding rule, and then the signal analysis module 30 analyzes the first communication information carried in the first power signal according to a corresponding decoding rule, so that the transmission of the information may be completed through the power interface 10 by customizing a private encoding manner. The private encoding method may be flexibly set according to actual situations, and is not limited herein.
Moreover, since the power interface 10 needs to transmit not only the second power signal output by the signal coupling module 40 but also the first power signal output by the signal generating unit 53, in order to distinguish various signals and avoid errors, in the embodiment of the present invention, the first power signal may be a third-order level signal, as shown in fig. 3 but not limited thereto, composed of three levels, 11V, 12V and 13V, and output intermittently according to a time axis through the three levels (i.e., voltages), so as to form a third-order level signal; the second power signal may be a carrier signal; that is, the signals output by the auxiliary processing module 50 are all three-order level signals, and the signals input to the auxiliary processing module 50 are all carrier signals; because the third-order level signal is a low-frequency signal and the carrier signal is a high-frequency signal, the two signals can be distinguished, and mutual interference is avoided.
At this time, for the signal analysis module 30, when analyzing the first power signal, the step change of a specific level (e.g. 12V) in the first power signal may be controlled to obtain the output time of each level, that is, the output sequence of each level, so that the signal processing module 20 determines the first communication information according to the output sequence of each level. Therefore, the decoding rule may determine the first communication information carried in the first power signal by controlling the step change of the specific level in the first power signal to obtain the output time of each level.
In addition, when the signal coupling module 40 couples the second communication information with the power signal provided by the signal analysis module 30, the signal analysis module 30 analyzes three voltage signals, so that when the signal coupling module 40 couples, the signal coupling module can couple with the second communication information using any voltage or voltage combination, which is not limited herein.
It should be noted that, in the embodiment of the present invention, how to determine whether the powered device n is in the communication period or the non-communication period with the external communication device 60 may be implemented as follows: it is determined whether the communication function between the power-supplied device n and the external communication device 60 is on. On one hand, it needs to determine that the communication function on the side of the auxiliary processing module 50 is turned on, so that the auxiliary processing module 50 can transmit the first communication information input by the external communication device 60 to the powered device n, and can also transmit the second communication information output by the powered device n to the external communication device 60. On the other hand, it is necessary to determine that the communication function on the signal processing module 20 side is on, so that the signal processing module 20 can output the second communication information to the external communication device 60.
That is, since the auxiliary processing module 50 is disposed outside the power-supplied device n, and the power-supplied device n needs to pass through the auxiliary processing module 50 to output the second communication information to the outside, if it is ensured that the power-supplied device n and the external communication device 60 perform normal communication, on one hand, it is necessary to start the communication function on the power-supplied device n side, which is called as successful first handshake, and on the other hand, it is necessary to start the communication function on the auxiliary processing module 50 side, which is called as successful second handshake, and after both handshakes are successful, the power-supplied device n can perform normal communication with the external communication device 60.
Therefore, normal communication between the powered device n and the external communication device 60 can be effectively ensured, communication interruption caused by the fact that the communication function is not started is avoided, and monitoring of the communication function is achieved.
Therefore, optionally, in the embodiment of the present invention, the auxiliary communication interface 51 in the auxiliary processing module 50 may be a full-duplex communication interface, so that bidirectional communication between the powered device n and the external communication device 60 may be realized.
The starting process of the communication function can be realized according to the following steps:
step one, a signal generating unit 53 couples preconfigured start information with a power signal input through an auxiliary power interface 54 according to a preset coding rule, generates a three-order level signal carrying the start information, and transmits the three-order level signal to a power interface 10;
step two, the signal analysis module 30 analyzes the three-order level signal transmitted through the power interface 10, and transmits the analyzed opening information to the signal processing module 20;
step three, the signal processing module 20 judges whether the received opening information is the same as the pre-configured opening information; if yes, executing the fourth step, and if not, executing the second step;
step four, the signal processing module 20 starts the communication function;
step five, the signal processing module 20 outputs the received opening information to the signal coupling module 40;
sixthly, the signal coupling module 40 couples the start information with the power signal provided by the signal analysis module 30 to generate a carrier signal carrying the start information, and outputs the carrier signal to the power interface 10;
step seven, the signal analyzing unit 52 analyzes the carrier signal transmitted through the power interface 10, and transmits the analyzed opening information to the signal processing unit 55;
step eight, the signal processing unit 55 judges whether the received opening information is the same as the pre-configured opening information; if yes, executing the ninth step, and if not, executing the first step;
step nine, the signal processing unit 55 starts the communication function.
Therefore, in the embodiment of the present invention, for the signal processing module 20, on one hand, it may be determined whether the power-supplied device n can communicate with the external communication device 60, and on the other hand, if it is determined that the power-supplied device n can communicate with the external communication device 60, the first communication information transmitted by the external communication device 60 through the auxiliary processing module 50 may be received, and corresponding processing may be performed according to the first communication information; the second communication information may also be output to the external communication device 60 through the auxiliary processing module 50; therefore, the communication unit 21 of the signal processing module 20 has a full-duplex communication interface function, thereby realizing bidirectional communication.
Wherein, for the preconfigured opening information, the powered device n and the auxiliary processing module 50 are determined by negotiation in advance. For example, the enabling information may be information carried by +12V _ output of a specific third-order level code pattern, such as 11.11.12.12.13.13.11.11.12.12.13.12.12.13.13, but is not limited thereto, since the enabling information is configured after the powered device n and the auxiliary processing module 50 negotiate in advance, when the signal processing module 20 determines that the information output by the signal analyzing module 30 is 11.11.12.12.13.13.11.11.12.12.13.12.12.13.13, the signal processing module 20 may determine that the information is enabling information that the powered device n can communicate with the external communication device 60, so as to enable the communication function between the powered device n and the external communication device 60.
In addition, the communication information (such as the first communication information and the second communication information) for communication can be flexibly set according to practical situations, such as but not limited to defining 11.11.12.12.13 as digital 1 and 13.13.12.12.11.11 as digital 0, and then converting the communication information into a signal of three levels according to the definition and outputting the signal to the power-supplied device n so as to facilitate the processing of the signal processing module 20 in the power-supplied device n.
Optionally, in order to implement the function of the signal coupling module 40, in the embodiment of the present invention, as shown in fig. 4, the signal coupling module 40 may specifically include: a coupling unit 41 and a pull-down unit 42;
a first input end of the coupling unit 41 is connected to the signal processing module 20, a second input end is connected to the signal analyzing module 30, a first output end is connected to the pull-down unit 42, and a second output end is connected to the power interface 10; the coupling unit 41 is configured to generate and output a second power signal after performing coupling processing on the second communication information and the power signal analyzed by the signal analysis module 30;
and a pull-down unit 42 for stabilizing the second power signal output by the coupling unit 41.
Specifically, as shown in fig. 4, the coupling unit 41 may be an inductor L0, and the pull-down unit 42 may be a first resistor R1; a first input end of the inductor L0 is connected to the communication unit 21 in the signal processing module 20, a second input end is connected to the signal analysis module 30, a first output end is connected to one end of the first resistor R1, and a second output end is connected to the power interface 10; the other end of the first resistor R1 is connected to ground.
Specifically, when the inductor L0 is selected, the inductor L0 with a frequency of 1KHz and a direct current of 1.5A of 1.9mH can be selected, but the inductor L3578 is not limited thereto.
The communication information output by the communication unit 21 can be successfully coupled to the power signal provided by the signal analysis module 30 through the inductor L0, and then the coupled carrier signal can be stably transmitted to the power interface 10 through the pull-down action of the first resistor R1, and is output to the auxiliary processing module 50 through the power interface 10.
Optionally, in order to implement the function of the signal analyzing module 30, in an embodiment of the present invention, the signal analyzing module 30 may be an AD sampling circuit.
Specifically, as shown in fig. 4, the signal analysis module 30 may specifically include: a second resistor R2 and a third resistor R3; one end of the second resistor R2 and one end of the third resistor R3 are both connected to the signal processing module 20; the other end of the second resistor R2 is connected with the power interface 10; the other end of the third resistor R3 is connected to ground.
Accordingly, the third-order level signal output from the signal generating unit 53 in the auxiliary processing module 50 can be analyzed through the second resistor R2 and the third resistor R3, so that output times of three levels can be analyzed, and since the three levels are output in a specific time sequence, the analyzed level information can be output to the signal processing module 20; the analyzed level information is collected through the AD sampling function in the signal processing module 20, so as to determine the information carried in the third-order level signal, and further process the information.
Specifically, in the embodiment of the present invention, the Signal processing module 20 may be a digital Signal processor, such as a dsp (digital Signal processor). Of course, the present invention is not limited to this, and other configurations may be used to implement the functions of the signal processing module 20.
Alternatively, as shown in fig. 1, fig. 2 and fig. 4, the auxiliary processing module 50 is disposed outside the power-supplied device n and connected to the power interface 10 of the power-supplied device n, so as not to affect the normal power supply and use of the power-supplied device n, as shown in fig. 2 and fig. 4, the auxiliary processing module 50 includes three external interfaces, namely an auxiliary power interface 54 for inputting a power signal provided by the external power device 70, an auxiliary communication interface 51 for inputting communication information provided by the external communication device 60, and an interface (not shown in the figure) for connecting to the power interface 10 of the power-supplied device n. Through the three external interfaces, power can be supplied to the supplied equipment n and the auxiliary processing module 50, so that normal operation of the supplied equipment n and the auxiliary processing module 50 is realized, normal communication between the supplied equipment n and the external communication equipment 60 can also be realized, and normal operation of the supplied equipment n is met.
Specifically, in order to implement the function of the signal analyzing unit 52, in the embodiment of the present invention, referring to fig. 4, the signal analyzing unit 52 may specifically include: a comparator K, a first resistance switching circuit 52a, a signal input circuit 52b, and a control circuit 52 c;
the input end of the signal input circuit 52b is connected with the power interface 10, and the output end is connected with the first input end of the comparator K; a signal input circuit 52b for inputting the second power supply signal to the comparator K;
the input end of the first resistance switching circuit 52a is connected with the auxiliary power supply interface 54, and the output end is connected with the second input end of the comparator K; a first resistance switching circuit 52a for controlling the output of the comparator K;
one end of the control circuit 52c is connected to the second input terminal of the comparator K, and the other end is connected to the output terminal of the comparator K; a control circuit 52c for controlling the output of the comparator K;
the output end of the comparator K is further connected to the signal processing unit 55, and is used for analyzing the second communication information carried in the second power signal under the control of the control circuit 52c and the first resistance switching circuit 52 a.
For example, referring to fig. 4, the signal input circuit 52b may include a fourth resistor R4 and a fifth resistor R5; one end of the fourth resistor R4 and one end of the fifth resistor R5 are both connected to the first input terminal of the comparator K, the other end of the fourth resistor R4 is grounded, and the other end of the fifth resistor R5 is connected to the power interface 10.
The first resistance switching circuit 52a may include: a seventh resistor R7, an eighth resistor R8, tenth to twelfth resistors R10 to R12, and a first switch S1; one end of the first switch S1 is connected to one end of the seventh resistor R7 and one end of the eighth resistor R8, respectively, and the other end of the first switch S1 is connected to one end of any one of the tenth resistor R10 to the twelfth resistor R12; the other end of the seventh resistor R7 is connected to the auxiliary power supply interface 54; the other end of the eighth resistor R8 is connected to the second input terminal of the comparator K, and the other ends of the tenth resistor R10 to the twelfth resistor R12 are all grounded.
The control circuit 52c may include: a sixth resistor R6 and a ninth resistor R9; one end of the sixth resistor R6 is connected to the output end of the comparator K, and the other end is connected to the signal processing unit 55; one end of the ninth resistor R9 is connected to the second input terminal of the comparator K, and the other end is connected to the output terminal of the comparator K and one end of the sixth resistor R6, respectively.
One end of the first switch S1 is fixed and is connected to one end of the seventh resistor R7 and one end of the eighth resistor R8, respectively, while the other end of the first switch S1 is not connected to a fixed resistor but is connected to one end of any one of the tenth resistor R10 to the twelfth resistor R12 according to different requirements; in addition, the other end of the first switch S1 is connected to a different resistor, that is, switched to a different resistor, so that the comparator K can output a different voltage, and the second communication information coupled in the second power signal can be detected by the comparator K, which is favorable for further processing by the signal processing unit 55.
Specifically, in order to realize the function of the signal generating unit 53, in the embodiment of the present invention, referring to fig. 4, the signal generating unit 53 specifically includes: a general power supply circuit D and a second resistance switching circuit 53 a;
the first input end of the general power supply circuit D is connected with the auxiliary power supply interface 54, the second input end is connected with the second resistance switching circuit 53a and the signal processing unit 55, respectively, and the output end is connected with the power supply interface 10;
and the general power supply circuit D is configured to output a power supply signal input through the auxiliary power supply interface 54 under the control of the second resistance switching circuit 53a and the signal processing unit 55, couple the first communication information output by the signal processing unit 55 and the power supply signal input through the auxiliary power supply interface 54, generate a first power supply signal carrying the first communication information, and output the first power supply signal.
For example, referring to fig. 4, the second resistance switching circuit 53a may include: a second switch S2, and thirteenth to fifteenth resistors R13 to R15; one end of the second switch S2 is connected to the first input end of the general power circuit D and the signal processing unit 55, and the other end is connected to one end of any one of the thirteenth resistor R13 to the fifteenth resistor R15; the other end of the thirteenth resistor R13 to the other end of the fifteenth resistor R15 are all grounded; the second input of the general power supply circuit D is connected to the auxiliary power supply interface 54, and the output is connected to the power supply interface 10.
For the general power supply circuit D, a Pulse Width Modulation (PWM) chip, two transistors (e.g., T1 and T2), an inductor Lt, a resistor R0, and a capacitor C0 are included; the functions of the universal power supply can be realized by the matching use of the devices.
Also, the second switch S2 is similar to the first switch S1, and one end of the second switch is fixed, and the other end of the second switch is not fixed, and can be connected to different resistors according to actual needs. Therefore, the connection between the second switch S2 and the thirteenth resistor R13 to the fifteenth resistor R15 can be switched by the signal processing unit 55 to form three types of matched feedback voltages, and the universal power circuit D outputs three voltages (i.e. levels) at different times according to different feedback voltages, i.e. according to the time axis and the preset coding rule, to form a coded three-level signal, such as the three-level signal shown in fig. 3.
For the signal processing unit 55, the first communication information input through the auxiliary communication interface 51 may be converted into a switching signal, so as to control the second switch S2 to switch to a corresponding resistor, thereby forming a matched feedback voltage. Specifically, the signal processing unit 55 may be implemented by a single chip or a logic circuit, but is not limited thereto, and may be implemented by other structures that can implement the function of the signal processing unit 55.
Of course, in specific implementation, a PWM may be further superimposed on the thirteenth resistor R13 to the fifteenth resistor R15 to modulate the voltage, so as to change the feedback voltage, and implement the output of the third-order level signal.
It should be noted that, in order to isolate the third-order level signal output by the signal generating unit 53 from the signal analyzing unit 52 and avoid being affected by the third-order level signal, a mode of a band-pass filter and waveform shaping may be used, so that the signal analyzing unit 52 may filter out the interference of the third-order level signal, and thus the signal analyzing unit 52 may normally and effectively process the carrier signal output by the powered device n through the power interface 10.
Of course, in order to avoid being affected by the third-order level signal, other ways may be adopted, such as setting the voltage output by the output terminal of the general power supply circuit D to be the same as the voltage output by the comparator K. Also, when the tenth resistor R10 and the thirteenth resistor R13 have the same resistance value, the eleventh resistor R11 and the fourteenth resistor R14 have the same resistance value, and the twelfth resistor R12 and the fifteenth resistor R15 have the same resistance value, the first switch S1 and the second switch S2 are connected to the resistors having the same resistance value, that is, the first switch S1 and the second switch S2 are simultaneously switched to the resistors having the same resistance value.
For example, referring to fig. 4, if the resistances of the tenth resistor R10 and the thirteenth resistor R13 are a, the resistances of the eleventh resistor R11 and the fourteenth resistor R14 are b, and the resistances of the twelfth resistor R12 and the fifteenth resistor R15 are c, when the first switch S1 is switched to the tenth resistor R10, the second switch S2 needs to be switched to the thirteenth resistor R13, so that the signal generating unit 53 and the comparator K in the signal analyzing unit 52 output the same voltage, thereby ensuring that the signal analyzing unit 52 only detects the carrier signal output by the powered device n through the power interface 10, and avoiding the influence of the third-order level signal.
In conclusion, through the arrangement of the power supply communication control circuit, a large extra power consumption burden is not required to be caused to the structure of the power supply equipment n, the power supply communication control circuit is low in cost, low in power consumption and high in reliability, and meanwhile, the power supply communication control circuit can be used for debugging equipment, production line production and field use of engineering technicians, so that the application range of the power supply equipment is greatly expanded.
The following describes in detail the working process of the powered device according to the embodiment of the present invention with reference to a specific embodiment.
The first embodiment is as follows: referring to the structure shown in fig. 2, a description will be given of a process in which the power-supplied device outputs the second communication information to the external communication device when it is determined that the communication function of the power-supplied device is on.
Step one, the signal processing module outputs second communication information to the signal coupling module through the communication unit;
coupling the second communication information to a power supply signal provided by the signal analysis module by the signal coupling module to form a carrier signal and outputting the carrier signal to a power supply interface;
thirdly, the power interface outputs the carrier signal to a signal analysis unit;
step four, the signal analysis unit extracts second communication information from the carrier signal and outputs the second communication information to the signal processing unit;
and fifthly, the signal processing unit outputs the second communication information to the external communication equipment through the auxiliary communication interface.
Example two: referring to the structure shown in fig. 2, when it is determined that the communication functions of the power-supplied device and the auxiliary processing module are both on, a process of outputting the first communication information to the power-supplied device by the external communication device will be described.
Step one, a signal processing unit receives first communication information input through an auxiliary communication interface;
secondly, generating a third-order level signal carrying first communication information by a signal generating unit according to a preset coding rule, and outputting the third-order level signal to a power interface;
step three, the power interface transmits the third-order level signal to the signal analysis module;
step four, the signal analysis module analyzes first communication information from the third-order level signal according to a preset decoding rule and transmits the first communication information to the signal processing module;
and step five, the signal processing module executes corresponding operation according to the first communication information.
Based on the same inventive concept, an embodiment of the present invention further provides a power supply communication system, as shown in fig. 1, which may include: a power-supplied device n, and the above power supply communication control circuit m as provided in the embodiment of the present invention;
a power supply communication control circuit m for supplying a direct-current voltage signal to the power-supplied device n through the power interface 10 of the power-supplied device n when the power-supplied device n is in a non-communication period with the external communication device 60; when the powered device n and the external communication device 60 are in a communication period, the first communication information input by the external communication device 60 is processed and then transmitted to the powered device n through the power interface 10, the second communication information output by the powered device n to the external communication device 60 is processed and then transmitted through the power interface 10, and the processed second communication information is secondarily processed and then output to the external communication device 60.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
The embodiment of the invention provides a power supply communication control circuit and a power supply communication system, wherein the power supply communication control circuit is arranged, when the fact that a power supply device can communicate with an external communication device is determined, the communication function between the power supply device and the external communication device is started, so that the communication between the power supply device and the external communication device can still be realized under the condition that the power supply device has a power interface but does not have the communication interface, namely, the power interface of the power supply device can realize the function of the communication interface, the normal power supply of the power supply device cannot be influenced, and the application range of the power supply device is greatly expanded.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (12)
1. A power supply communication control circuit, comprising: the device comprises an auxiliary processing module, a signal analysis module and a signal coupling module;
the auxiliary processing module is connected with a power interface of a power-supplied device, and the signal analysis module and the signal coupling module are respectively connected between the power interface and the signal processing module of the power-supplied device; the signal analysis module is also connected with the signal coupling module;
the auxiliary processing module is used for outputting a direct-current voltage signal to the power interface when the powered device and the external communication device are in a non-communication period; when the powered device and the external communication device are in a communication period, outputting a first power supply signal to the power supply interface, receiving a second power supply signal transmitted by the power supply interface, analyzing second communication information and sending the second communication information to the external communication device; the first power signal carries first communication information sent by the external communication equipment to the powered equipment, and the second power signal carries second communication information sent by the powered equipment to the external communication equipment;
the signal analysis module is used for receiving and analyzing the first power supply signal transmitted by the power supply interface and transmitting the analyzed first communication information to the signal processing module for processing; and providing the analyzed power supply signal to the signal coupling module;
the signal coupling module is configured to couple the second communication information output by the signal processing module with the power signal provided by the signal analysis module to form the second power signal, and output the second power signal to the power interface.
2. The control circuit of claim 1, wherein the first power signal is a third order level signal; the second power signal is a carrier signal.
3. The control circuit of claim 1, wherein the signal parsing module is an AD sampling circuit.
4. The control circuit of claim 1, wherein the signal coupling module specifically comprises: a coupling unit and a pull-down unit;
the first input end of the coupling unit is connected with the signal processing module, the second input end of the coupling unit is connected with the signal analysis module, the first output end of the coupling unit is connected with the pull-down unit, and the second output end of the coupling unit is connected with the power interface; the coupling unit is used for coupling the second communication information with the power supply signal analyzed by the signal analysis module, generating and outputting the second power supply signal;
the pull-down unit is used for stabilizing the second power supply signal output by the coupling unit.
5. The control circuit of claim 1, wherein the auxiliary processing module comprises: the system comprises an auxiliary power supply interface connected with external power supply equipment, an auxiliary communication interface connected with the external communication equipment, a signal processing unit connected with the auxiliary communication interface, and a signal analysis unit and a signal generation unit which are connected between the power supply interface and the signal processing unit; the signal generating unit is also connected with the auxiliary power supply interface;
the signal generating unit is configured to, when receiving the first communication information, perform coupling processing on the first communication information and a power signal input by the external power supply device through the auxiliary power interface, generate a first processing power signal carrying the first communication information, and output the first processing power signal to the power interface; when the first communication information is not received, outputting a power supply signal input by the external power supply equipment through the auxiliary power supply interface to the power supply interface; the power supply signal input by the auxiliary power supply interface is a direct-current voltage signal;
the signal analysis unit is used for analyzing the second communication information from the second power supply signal and outputting the second communication information to the signal processing unit;
the signal processing unit is configured to output the first communication signal to the signal generating unit and output the second communication information to the external communication device through the auxiliary communication interface when it is determined that the powered device and the external communication device are in a communication period.
6. The control circuit of claim 5, wherein the signal parsing unit specifically comprises: the circuit comprises a comparator, a first resistance switching circuit, a signal input circuit and a control circuit;
the input end of the signal input circuit is connected with the power interface, and the output end of the signal input circuit is connected with the first input end of the comparator; the signal input circuit is used for inputting the second power supply signal to the comparator;
the input end of the first resistance switching circuit is connected with the auxiliary power supply interface, and the output end of the first resistance switching circuit is connected with the second input end of the comparator; the first resistance switching circuit is used for controlling the output of the comparator;
one end of the control circuit is connected with the second input end of the comparator, and the other end of the control circuit is connected with the output end of the comparator; the control circuit is used for controlling the output of the comparator;
the output end of the comparator is further connected with the signal processing unit and used for analyzing second communication information carried in the second power supply signal under the control of the control circuit and the first resistance switching circuit.
7. The control circuit according to claim 6, wherein the signal generating unit specifically comprises: a general power supply circuit and a second resistance switching circuit;
the first input end of the general power supply circuit is connected with the auxiliary power supply interface, the second input end of the general power supply circuit is respectively connected with the second resistance switching circuit and the signal processing unit, and the output end of the general power supply circuit is connected with the power supply interface;
the universal power circuit is configured to output a power signal input through the auxiliary power interface under the control of the second resistance switching circuit and the signal processing unit, couple the first communication information output by the signal processing unit with the power signal input through the auxiliary power interface, and generate and output a first power signal carrying the first communication information.
8. The control circuit of claim 7 wherein the voltage output by the output of the universal power supply circuit is the same as the voltage output by the comparator.
9. The control circuit of claim 5, wherein the signal processing unit is a single chip or a logic circuit.
10. The control circuit according to any of claims 1-9, wherein the auxiliary processing module is disposed external to the powered device;
the signal analysis module and the signal coupling module are both arranged inside the power supply device.
11. A powered communication system, comprising: a powered device, and a power communications control circuit as claimed in any one of claims 1 to 10;
the power supply communication control circuit is used for providing a direct-current voltage signal for the power supply device through a power interface of the power supply device when the power supply device is in a non-communication period with an external communication device; when the powered device and the external communication device are in a communication period, processing first communication information input by the external communication device, transmitting the first communication information to the powered device through the power interface, processing second communication information output to the external communication device by the powered device, transmitting the second communication information through the power interface, performing secondary processing on the second communication information, and outputting the second communication information to the external communication device.
12. The powered communication system of claim 11, wherein the powered device is a video camera, or a still camera.
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