Information interaction system, communication circuit for powered equipment and communication circuit for power supply equipment

Abstract

The present invention provides an information interaction system, a communication circuit for a powered device, and a communication circuit for a powered device. The information interaction system includes a first mechanism, a second mechanism, a common line, a first resistor, a second resistor, and a first control line; the first mechanism is connected to the second mechanism through the common line to establish a voltage reference; the first resistor and the second resistor are connected in series between the first reference voltage and the common line in sequence or in reverse order, and the resistance value of the first resistor is adjusted according to the first resistance adjustment signal sent by the second mechanism; the first control line is provided at the common end of the first resistor and the second resistor, and is used to output a first detection voltage to the first mechanism, so that the first mechanism obtains the resistance value of the first resistor according to the first detection voltage. It is possible to use a simple communication line to communicate and synchronize information by detecting the resistance value of the resistor to ensure communication between the first mechanism and the second mechanism. It has the advantages of simple circuit, low cost, and reliable communication.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to an information interaction system in a high-voltage charging port, a communication circuit for a powered device, and a communication circuit for a powered device. Background Art

[0002] With the development of electronic technology, more and more electronic organizations need to communicate and interconnect to achieve mutual cooperation. In this process, being able to use the simplest communication lines to achieve information exchange between organizations is a goal that industry practitioners have always pursued. For example, in terms of mobile phone charging, in addition to charging needs to be more convenient and fast, the reliability of charging is also becoming more and more important. For wired charging solutions, it is generally to increase the charging voltage to improve charging efficiency and reduce charging losses. In high-voltage charging systems, it is particularly important to use simple and commonly used communication lines such as USB (Universal Serial Bus) cables to ensure the reliability of communication and synchronization between the power supply equipment and the powered equipment. Summary of the invention

[0003] The object of the present invention is to provide an information interaction system, a communication circuit for a powered device and a communication circuit for a powered device, which can ensure reliable communication between a first mechanism and a second mechanism by using a simple communication line.

[0004] Specifically, the present invention first provides an information interaction system, including a first mechanism, a second mechanism, a common line, a first resistor, a second resistor and a first control line; the first mechanism is connected to the second mechanism through the common line to establish a voltage reference; the first resistor and the second resistor are connected in series between a first reference voltage and the common line in sequence or in reverse sequence, and the resistance value of the first resistor is adjusted according to a first resistance adjustment signal sent by the second mechanism; the first control line is arranged at the common end of the first resistor and the second resistor, and is connected to the first mechanism, for outputting a first detection voltage to the first mechanism, so that the first mechanism obtains the resistance value of the first resistor according to the first detection voltage.

[0005] Furthermore, the information interaction system also includes a first switch element, the first control line is connected to the second mechanism, and is used to output the first detection voltage to the second mechanism, the input end of the first switch element is electrically connected to the first control line, the output end of the first switch element is electrically connected to the common line, and the control end of the first switch element is electrically connected to the first mechanism to receive the first switching signal output by the first mechanism to be turned on or off, thereby adjusting the voltage value of the first detection voltage of the first control line, so that the second mechanism obtains the switching state of the first switch element according to the first detection voltage.

[0006] Furthermore, the information interaction system also includes a second switch element, an input end of the second switch element is electrically connected to the first control line, an output end of the second switch element is electrically connected to the common line, and when the first resistor and the second resistor are connected in series in sequence between the first reference voltage and the common line, the control end of the second switch element is electrically connected to the second mechanism to receive a second control signal of the second mechanism to be turned on or off, thereby adjusting the voltage value of the first detection voltage of the first control line so that the first mechanism obtains the switching state of the second switch element according to the first detection voltage.

[0007] Furthermore, the resistance value of the second resistor is adjusted according to a second resistance adjustment signal sent by the first mechanism, and the first control line is connected to the second mechanism for outputting the first detection voltage to the second mechanism so that the second mechanism obtains the resistance value of the second resistor according to the first detection voltage.

[0008] Furthermore, the information interaction system further comprises a third resistor, a fourth resistor and a second control line, the third resistor and the fourth resistor are connected in series between the second reference voltage and the common line in sequence or in reverse sequence, and the resistance value of the third resistor is adjusted according to the third resistance adjustment signal sent by the second mechanism;

[0009] The second control line is provided at a common end of the third resistor and the fourth resistor and is connected to the first mechanism for outputting a second detection voltage to the first mechanism so that the first mechanism obtains the resistance value of the third resistor according to the second detection voltage.

[0010] Furthermore, the information interaction system also includes a third resistor, a fourth resistor and a second control line, the third resistor and the fourth resistor are connected in series between the second reference voltage and the common line in sequence or in reverse order, and the resistance value of the fourth resistor is adjusted according to a fourth resistance adjustment signal sent by the first mechanism; the second control line is arranged at the common end of the third resistor and the fourth resistor, and is connected to the second mechanism, for outputting a second detection voltage to the second mechanism, so that the second mechanism obtains the resistance value of the fourth resistor according to the second detection voltage.

[0011] Furthermore, the information interaction system also includes a third resistor, a fourth resistor, a second control line and a third switch element, the third resistor and the fourth resistor are connected in series between the second reference voltage and the common line in sequence or in reverse order, the second control line is arranged at the common end of the third resistor and the fourth resistor, and is connected to the second mechanism for outputting a second detection voltage to the second mechanism, the input end of the third switch element is electrically connected to the second control line, the output end of the third switch element is electrically connected to the common line, and the control end of the third switch element is electrically connected to the first mechanism to receive the third switch signal output by the first mechanism to be turned on or off, thereby adjusting the voltage value of the second detection voltage of the second control line, so that the second mechanism obtains the switching state of the third switch element according to the second detection voltage.

[0012] Furthermore, the information interaction system also includes a third resistor, a fourth resistor, a second control line and a fourth switch element, the third resistor and the fourth resistor are connected in series between the second reference voltage and the common line in sequence or in reverse order, the second control line is arranged at the common end of the third resistor and the fourth resistor, and is connected to the second mechanism for outputting a second detection voltage to the second mechanism; the input end of the fourth switch element is electrically connected to the first control line, the output end of the fourth switch element is electrically connected to the second control line, and the control end of the fourth switch element is electrically connected to the first mechanism to receive the fourth switch signal output by the first mechanism and turn on or off, thereby adjusting the voltage value of the second detection voltage of the second control line, so that the second mechanism obtains the switching state of the fourth switch element according to the second detection voltage.

[0013] Furthermore, the information interaction system also includes a third resistor, a fourth resistor, a second control line and a fifth switch element, the third resistor and the fourth resistor are connected in series in sequence between the second reference voltage and the common line, the second control line is arranged at the common end of the third resistor and the fourth resistor, and is connected to the first mechanism for outputting a second detection voltage to the first mechanism; the input end of the fifth switch element is electrically connected to the second control line, the output end of the fifth switch element is electrically connected to the common line, and the control end of the fifth switch element is electrically connected to the second mechanism to receive the fifth control signal of the second mechanism and turn on or off, thereby adjusting the output of the second detection voltage to the first mechanism, so that the first mechanism obtains the switching state of the fifth switch element according to the second detection voltage.

[0014] Furthermore, the first mechanism is a power supply device, and the second mechanism is a power receiving device.

[0015] The present invention also provides a communication circuit for a powered device. Specifically, the communication circuit for the powered device includes a powered device, a common line, a first resistor, a second resistor and a first control line, wherein: the powered device establishes a voltage reference through the common line; the first resistor and the second resistor are connected in series between a first reference voltage and the common line in sequence or in reverse sequence, and the resistance value of the first resistor is adjusted according to a first resistance adjustment signal sent by the powered device; the first control line is provided at the common end of the first resistor and the second resistor, and is used to output a first detection voltage, so that the powered device outputs the resistance value information of the first resistor through the first control line.

[0016] Furthermore, the powered device communication circuit also includes a second switch element, an input end of the second switch element is electrically connected to the first control line, an output end of the second switch element is electrically connected to the common line, and when the first resistor and the second resistor are sequentially connected in series between the first reference voltage and the common line, the control end of the second switch element is electrically connected to the powered device to receive a second control signal of the powered device and be turned on or off, thereby adjusting the voltage value of the first detection voltage of the first control line, so that the powered device outputs the switch state information of the second switch element through the first control line.

[0017] Furthermore, the powered device communication circuit also includes a third resistor, a fourth resistor and a second control line, wherein: the third resistor and the fourth resistor are connected in series between the second reference voltage and the common line in sequence or in reverse order, and the resistance value of the third resistor is adjusted according to a third resistance adjustment signal sent by the powered device; the second control line is provided at the common end of the third resistor and the fourth resistor, and is used to output a second detection voltage, so that the powered device outputs the resistance value information of the third resistor through the second control line.

[0018] Furthermore, the powered device communication circuit also includes a third resistor, a fourth resistor, a second control line and a fifth switch tube, wherein: the third resistor and the fourth resistor are connected in series in sequence between the second reference voltage and the common line, and the second control line is provided at the common end of the third resistor and the fourth resistor, and is used to output a second detection voltage; the input end of the fifth switch element is electrically connected to the second control line, the output end of the fifth switch element is electrically connected to the common line, and the control end of the fifth switch element is electrically connected to the powered device to receive a second control signal of the powered device and be turned on or off, thereby adjusting the voltage value of the second detection voltage of the second control line, so that the powered device outputs the switch state information of the fifth switch element through the second control line.

[0019] The present invention also provides a power supply device communication circuit. Specifically, the power supply device communication circuit includes a power supply device, a common line, a first resistor, a second resistor and a first control line, wherein: the power supply device establishes a voltage reference through the common line; the first resistor and the second resistor are connected in series between a first reference voltage and the common line in sequence or in reverse sequence, and the first resistor is a resistor with adjustable resistance value; the first control line is arranged at the common end of the first resistor and the second resistor and is electrically connected to the power supply device, and is used to output a first detection voltage to the power supply device, so that the power supply device obtains the resistance value of the first resistor according to the first detection voltage.

[0020] Further, the resistance value of the second resistor is adjusted according to a second resistance adjustment signal sent by the power supply device, thereby changing the first detection voltage of the first control line, so that the power supply device outputs the resistance value information of the second resistor through the first control line.

[0021] Furthermore, the power supply device communication circuit also includes a third resistor, a fourth resistor and a second control line, wherein: the third resistor and the fourth resistor are connected in series between the second reference voltage and the common line in sequence or in reverse order, and the second control line is arranged at the common end of the third resistor and the fourth resistor, for outputting a second detection voltage; the resistance value of the fourth resistor is adjusted according to a fourth resistance adjustment signal sent by the power supply device, thereby changing the second detection voltage of the second control line, so that the power supply device outputs the resistance value information of the fourth resistor through the second control line.

[0022] Furthermore, the power supply device communication circuit also includes a third resistor, a fourth resistor, a second control line and a fourth switch element, wherein: the third resistor and the fourth resistor are connected in series between the second reference voltage and the common line in sequence or in reverse order, and the second control line is arranged at the common end of the third resistor and the fourth resistor, and is used to output a second detection voltage; the input end of the fourth switch element is electrically connected to the first control line, the output end of the fourth switch element is electrically connected to the second control line, and the control end of the fourth switch element is electrically connected to the power supply device to receive a fourth switch signal output by the power supply device and turn on or off, thereby adjusting the voltage value of the second detection voltage of the second control line, so that the power supply device outputs the switch status information of the fourth switch element through the second control line.

[0023] The information interaction system, the communication circuit of the power receiving device and the communication circuit of the power supply device provided by the present invention can utilize a simple communication line to detect the resistance value, exchange information and synchronize, and ensure the communication between different institutions. It has the advantages of simple circuit, low cost and reliable communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A circuit diagram of an information interaction system according to an embodiment of the present invention Figure 1 .

[0025] Figure 2 A circuit diagram of an information interaction system according to an embodiment of the present invention Figure 2 .

[0026] Figure 3 A circuit diagram of an information interaction system according to an embodiment of the present invention Figure 3 .

[0027] Figure 4 A circuit diagram of an information interaction system according to an embodiment of the present invention Figure 4 .

[0028] Figure 5 A circuit diagram of an information interaction system according to an embodiment of the present invention Figure 5 .

[0029] Figure 6 A circuit diagram of an information interaction system according to an embodiment of the present invention Figure 6 .

[0030] Figure 7 A circuit diagram of an information interaction system according to an embodiment of the present invention Figure 7 .

[0031] Figure 8 A circuit diagram of an information interaction system according to an embodiment of the present invention Figure 8 .

[0032] Fig. 9 A circuit diagram of an information interaction system according to an embodiment of the present invention Figure 9 .

[0033] Fig.10 A circuit diagram of an information interaction system according to an embodiment of the present invention Figure 10 .

[0034] Fig.11 A circuit diagram of an information interaction system according to an embodiment of the present invention Figure 10 one.

[0035] Fig.12 A circuit diagram of an information interaction system according to an embodiment of the present invention Figure 10 two.

[0036] Fig.13 A circuit for a communication circuit of a powered device according to an embodiment of the present invention Figure 1 .

[0037] Fig.14 A circuit for a communication circuit of a powered device according to an embodiment of the present invention Figure 2 .

[0038] Fig.15 A circuit for a communication circuit of a powered device according to an embodiment of the present invention Figure 3 .

[0039] Fig.16 A circuit for a communication circuit of a powered device according to an embodiment of the present invention Figure 4 .

[0040] Fig.17 A circuit for a power supply device communication circuit according to an embodiment of the present invention Figure 1 .

[0041] Fig.18 A circuit for a power supply device communication circuit according to an embodiment of the present invention Figure 2 .

[0042] Fig.19 A circuit for a power supply device communication circuit according to an embodiment of the present invention Figure 3 .

[0043] Fig. 20 A circuit for a power supply device communication circuit according to an embodiment of the present invention Figure 4 . DETAILED DESCRIPTION

[0044] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0045] In a first aspect, the present invention provides an information interaction system.

[0046] Figure 1 A circuit diagram of an information interaction system according to an embodiment of the present invention Figure 1 The information interaction system includes a first mechanism 1, a second mechanism 2, a common line G, a first resistor R1, a second resistor R2 and a first control line D1.

[0047] like Figure 1 As shown, the first mechanism 1 is connected to the second mechanism 2 via a common line G to establish a voltage reference.

[0048] In one embodiment, the first resistor R1 and the second resistor R2 are connected in series in sequence between the first reference voltage V1 and the common line G, and the resistance value of the first resistor R1 is adjusted according to the first resistance adjustment signal sent by the second mechanism 2 .

[0049] The first control line D1 is disposed at a common end of the first resistor R1 and the second resistor R2 and connected to the first mechanism 1 for outputting a first detection voltage to the first mechanism 1 so that the first mechanism 1 obtains the resistance value of the first resistor R1 according to the first detection voltage.

[0050] It is known that the resistance of the second resistor R2 is Rd. Under the condition of the first reference voltage V1, when the voltage Vd on the first control line D1 is detected, the first mechanism 1 calculates the resistance of the first resistor R1 to be Rp=Rd*(V1 / Vd-1).

[0051] Thus, the second mechanism 2 can transmit information to the first mechanism 1 by changing the resistance Rp of the first resistor R1. For example, in one embodiment, when the resistance Rp of the first resistor R1 is detected to be in the first interval, the first mechanism 1 does not take any action. When the resistance Rp of the first resistor R1 is detected to be in the second interval, the first mechanism 1 regards it as a first command and responds. When the resistance Rp of the first resistor R1 is detected to be in the third interval, the first mechanism 1 regards it as a second command and responds. And so on. In another embodiment, when the resistance Rp of the first resistor R1 is detected to be in the first interval, the first mechanism 1 does not take any action. When the resistance Rp of the first resistor R1 is detected to be greater than the first interval, the first mechanism 1 regards it as a first command and responds. When the resistance Rp of the first resistor R1 is detected to be less than the first interval, the first mechanism 1 regards it as a second command and responds. In other embodiments, the two different resistance values ​​Rp of the first resistor R1 can be respectively encoded and defined as digital signals 1 or 0, so that the second mechanism 2 transmits the encoded digital data packet to the first mechanism 1 through the resistance Rp of the first resistor R1 to transmit more and more complex information.

[0052] In one embodiment, if Figure 2 Circuit of an information interaction system of an embodiment Figure 2 As shown, the first resistor R1 and the second resistor R2 are connected in series in reverse order between the first reference voltage V1 and the common line G, and the resistance value of the first resistor R1 is adjusted according to the first resistance adjustment signal sent by the second mechanism 2. Figure 1 In this case, the resistance of the second resistor R2 is known to be Rd, the first reference voltage is V1, and when the voltage Vd on the first control line D1 is detected, the first mechanism 1 calculates the resistance of the first resistor R1 to be Rp=Rd*Vd / (V1-Vd).

[0053] Therefore, the second mechanism 2 can transmit information to the first mechanism 1 by changing the resistance value Rp of the first resistor R1.

[0054] Figure 3 A circuit diagram of an information interaction system according to an embodiment of the present invention Figure 3. In one embodiment, the information interaction system further includes a first switch element K1. The first control line D1 is connected to the second mechanism 2, and is also used to output a first detection voltage to the second mechanism 2. The input end of the first switch element K1 is electrically connected to the first control line D1, the output end of the first switch element K1 is electrically connected to the common line G, and the control end of the first switch element K1 is electrically connected to the first mechanism 1 to receive the first switch signal output by the first mechanism 1 to turn on or off, thereby adjusting the voltage value of the first detection voltage of the first control line D1, so that the second mechanism 2 obtains the switching state of the first switch element K1 according to the first detection voltage.

[0055] In this embodiment, since the second mechanism 2 can obtain two different state signals from the first control line D1, the first mechanism 1 and the second mechanism 2 can realize time-sharing bidirectional communication through the first control line D1. When the first switch K1 is turned on, it is equivalent to short-circuiting the first control line D1 to the common reference voltage ground. Therefore, in order to avoid communication interruption, the first switch K1 is in a normally open state. When the first switch K1 needs to be turned on, the first switch K1 is turned on for a specific period of time and then disconnected again. In other embodiments, a resistor can be connected in series to the input end or the output end of the first switch K1, so that the first switch K1 can be in a normally closed or normally open state. As in the above embodiment, by assigning different codes or meanings to different switch states of the first switch K1, various information can be transmitted from the first mechanism 1 to the second mechanism 2. When defining different switch states of the first switch K1, in simpler communications, it can be a confirmation signal or a handshake signal. In more complex communications, the Morse code encoding method can be referred to, and different codes can be given to the signal by different conduction durations, so that the first mechanism 1 transmits the encoded digital data packet to the second mechanism 2 through the first switch K1 to transmit more and more complex information. Thus, the first mechanism 1 and the second mechanism 2 can achieve time-sharing bidirectional communication through the first control line D1 and the second control line D2.

[0056] Figure 4 A circuit diagram of an information interaction system according to an embodiment of the present invention Figure 4 . In one embodiment, the information interaction system further includes a second switch element K2. The input end of the second switch element K2 is electrically connected to the first control line D1, the output end of the second switch element K2 is electrically connected to the common line G, the first resistor R1 and the second resistor R2 are connected in series in sequence between the first reference voltage V1 and the common line G, and the control end of the second switch element K2 is electrically connected to the second mechanism 2 to receive the second control signal of the second mechanism 2 to be turned on or off, thereby adjusting the voltage value of the first detection voltage of the first control line D1, so that the first mechanism 1 obtains the switching state of the second switch element K2 according to the first detection voltage.

[0057] In this embodiment, the second mechanism 2 can send two different status signals to the first mechanism 1 through the second switch element K2. Therefore, referring to the above embodiment, different codes or meanings can be assigned to different switching states of the second switch element K2, so that the second mechanism 2 can transmit more information to the first mechanism 1 by adjusting the first resistor R1 and the second switch element K2.

[0058] Figure 5 A circuit diagram of an information interaction system according to an embodiment of the present invention Figure 5 In one embodiment, the resistance value of the second resistor R2 is adjusted according to the second resistance adjustment signal sent by the first mechanism 1. The first control line D1 is connected to the second mechanism 2 and is also used to output the first detection voltage to the second mechanism 2, so that the second mechanism 2 obtains the resistance value of the second resistor R2 according to the first detection voltage.

[0059] Please refer to Figure 1 and Figure 3 In this embodiment, due to the adjustment of the resistance value of the second resistor R2 by the first mechanism 1, the second mechanism 2 can obtain the resistance value of the second resistor R2 from the first control line D1, and by assigning specific codes or meanings to different resistance value intervals of the second resistor R2, the first mechanism 1 and the second mechanism 2 can achieve time-sharing bidirectional communication through the first control line D1.

[0060] At the same time, in this embodiment, when the first mechanism 1 cannot predict the specific voltage value of the first reference voltage V1, the first mechanism 1 can also obtain the resistance value of the first resistor R1 by adjusting the resistance value of the second resistor R2 and obtaining the voltage value on the second resistor R2 before and after the adjustment. For example, when the first resistor R1 and the second resistor R2 are connected in series in sequence between the first reference voltage V1 and the common line G, the resistance value of the first resistor R1 is Rp. The resistance value of the second resistor R2 before adjustment is Rd1, and the voltage value is Vd1; the resistance value of the second resistor R2 before adjustment is Rd2, and the voltage value is Vd2. At this time, it can be calculated that Rp = (Vd2-Vd1) / (Vd1 / Rd1-Vd2 / Rd2). Please refer to Figure 1 Embodiment, thereby the second mechanism 2 can transmit information to the first mechanism 1 by changing the resistance value of the first resistor R1.

[0061] Figure 6 A circuit diagram of an information interaction system according to an embodiment of the present invention Figure 6In one embodiment, the information interaction system further includes a third resistor R3, a fourth resistor R4, and a second control line D2, the third resistor R3 and the fourth resistor R4 are connected in series in sequence between the second reference voltage V2 and the common line G, and the resistance value of the third resistor R3 is adjusted according to the third resistance adjustment signal sent by the second mechanism 2. In another embodiment, the third resistor R3 and the fourth resistor R4 are connected in series in reverse order between the second reference voltage V2 and the common line G, and the resistance value of the third resistor R3 is adjusted according to the third resistance adjustment signal sent by the second mechanism 2.

[0062] The second control line D2 is disposed at the common end of the third resistor R3 and the fourth resistor R4 and connected to the first mechanism 1 for outputting a second detection voltage to the first mechanism 1 so that the first mechanism 1 obtains the resistance value of the third resistor R3 according to the second detection voltage.

[0063] In this embodiment, the first mechanism 1 can obtain the information of the second mechanism 2 by obtaining the resistance value of the first resistor R1. Figure 1 and Figure 2 In the embodiment, when the resistance value of the fourth resistor R4 is known and the second detection voltage is obtained, the first mechanism 1 calculates the resistance value of the third resistor R3, thereby obtaining information of the second mechanism 2. In this case, a second communication channel is obtained between the first mechanism 1 and the second mechanism 2.

[0064] Figure 7 A circuit diagram of an information interaction system according to an embodiment of the present invention Figure 7 . In one embodiment, the information interaction system further includes a third resistor R3, a fourth resistor R4, and a second control line D2. The third resistor R3 and the fourth resistor R4 are sequentially connected in series between the second reference voltage V2 and the common line G, and the resistance value of the fourth resistor R4 is adjusted according to the fourth resistance adjustment signal sent by the first mechanism 1. In another embodiment, the third resistor R3 and the fourth resistor R4 are sequentially connected in series between the second reference voltage V2 and the common line G, and the resistance value of the fourth resistor R4 is adjusted according to the fourth resistance adjustment signal sent by the first mechanism 1.

[0065] The second control line D2 is disposed at the common end of the third resistor R3 and the fourth resistor R4 and connected to the second mechanism 2 for outputting a second detection voltage to the second mechanism 2 so that the second mechanism 2 obtains the resistance value of the fourth resistor R4 according to the second detection voltage.

[0066] In this embodiment, the first mechanism 1 can obtain the information of the second mechanism 2 by obtaining the resistance value of the first resistor R1. Figure 1 and Figure 2In the embodiment, when the resistance value of the third resistor R3 is known and the second detection voltage is obtained, the second mechanism 2 can calculate the resistance value of the fourth resistor R4, thereby obtaining information of the first mechanism 1. Thus, the first mechanism 1 and the second mechanism 2 can achieve full-time bidirectional communication through the first control line D1 and the second control line D2.

[0067] Figure 8 A circuit diagram of an information interaction system according to an embodiment of the present invention Figure 8 In one embodiment, the information interaction system further includes a third resistor R3, a fourth resistor R4, a second control line D2 and a third switch K3, and the third resistor R3 and the fourth resistor R4 are connected in series between the second reference voltage V2 and the common line G in sequence or in reverse sequence. The second control line D2 is provided at the common end of the third resistor R3 and the fourth resistor R4, and is connected to the second mechanism 2, for outputting the second detection voltage to the second mechanism 2. The input end of the third switch K3 is electrically connected to the second control line D2, and the output end of the third switch K3 is electrically connected to the common line G.

[0068] The control end of the third switch element K3 is electrically connected to the first mechanism 1 to receive the third switch signal output by the first mechanism 1 and be turned on or off, thereby adjusting the voltage value of the second detection voltage of the second control line D2 so that the second mechanism 2 obtains different switching states of the third switch element K3 according to the second detection voltage.

[0069] In this embodiment, the first mechanism 1 can obtain the information of the second mechanism 2 by obtaining the resistance value of the first resistor R1. Figure 3 In the embodiment, by assigning different codes or meanings to different switch states of the third switch element K3, various information can be transmitted from the first mechanism 1 to the second mechanism 2. Thus, the first mechanism 1 and the second mechanism 2 can achieve full-time two-way communication through the first control line D1 and the second control line D2.

[0070] Fig. 9 A circuit diagram of an information interaction system according to an embodiment of the present invention Figure 9 In one embodiment, the information interaction system further includes a third resistor R3, a fourth resistor R4, a second control line D2 and a fourth switch K4, and the third resistor R3 and the fourth resistor R4 are connected in series between the second reference voltage V2 and the common line G in sequence or in reverse sequence. The second control line D2 is provided at the common end of the third resistor R3 and the fourth resistor R4, and is connected to the second mechanism 2, and is used to output the second detection voltage to the second mechanism 2. The input end of the fourth switch K4 is electrically connected to the first control line D1, and the output end of the fourth switch K4 is electrically connected to the second control line D2.

[0071] The control end of the fourth switch element K4 is electrically connected to the first mechanism 1 to receive the fourth switch signal output by the first mechanism 1 and be turned on or off, thereby adjusting the voltage value of the second detection voltage of the second control line D2 so that the second mechanism 2 obtains different switching states of the fourth switch element K4 according to the second detection voltage.

[0072] In this embodiment, the first mechanism 1 can obtain the information of the second mechanism 2 by obtaining the resistance value of the first resistor R1, and can transmit various information from the first mechanism 1 to the second mechanism 2 by assigning different codes or meanings through different switch states of the fourth switch element K4. Therefore, the first mechanism 1 and the second mechanism 2 can achieve time-sharing bidirectional communication through the first control line D1 and the second control line D2.

[0073] Fig.10 A circuit diagram of an information interaction system according to an embodiment of the present invention Figure 10 In one embodiment, the information interaction system further includes a third resistor R3, a fourth resistor R4, a second control line D2 and a fifth switch K5, wherein the third resistor R3 and the fourth resistor R4 are sequentially connected in series between the second reference voltage V2 and the common line G. The second control line D2 is provided at the common end of the third resistor R3 and the fourth resistor R4, and is connected to the first mechanism 1, and is used to output the second detection voltage to the first mechanism 1. The input end of the fifth switch K5 is electrically connected to the second control line D2, and the output end of the fifth switch K5 is electrically connected to the common line G.

[0074] The control end of the fifth switch element K5 is electrically connected to the second mechanism 2 to receive the fifth control signal of the second mechanism 2 to be turned on or off, thereby adjusting the output of the second detection voltage to the first mechanism 1 so that the first mechanism 1 obtains different switching states of the fifth switch element K5 according to the second detection voltage.

[0075] In this embodiment, the first mechanism 1 can obtain the information of the second mechanism 2 by obtaining the resistance value of the first resistor R1. Figure 4 In the embodiment, the first mechanism 1 can also obtain information of the second mechanism 2 through different switch states of the fifth switch K5. Thus, a second communication channel is obtained between the first mechanism 1 and the second mechanism 2.

[0076] In one embodiment, the information interaction system is applied to a power transmission system, the first mechanism 1 is a power supply device, and the second mechanism 2 is a power receiving device. The power supply device and the power receiving device realize power supply and information interconnection through a USB cable. In other embodiments, the information interaction system can also be applied to various other circuit systems that require information exchange.

[0077] Fig.11 A circuit diagram of an information interaction system according to an embodiment of the present invention Figure 101. In one embodiment, the information interaction system includes a first mechanism 1, i.e., a power supply device, a second mechanism 2, i.e., a power receiving device, a common line G, a first resistor R1, a second resistor R2, and a first control line D1;

[0078] The power supply device is connected to the powered device via a common line G to establish a voltage reference;

[0079] A first resistor R1 and a second resistor R2 are connected in series in sequence between a first reference voltage V1 and a common line G, and a resistance value of the first resistor R1 is adjusted according to a first resistance adjustment signal sent by the powered device;

[0080] The first control line D1 is disposed at a common end of the first resistor R1 and the second resistor R2 and connected to the power supply device for outputting a first detection voltage to the power supply device so that the power supply device obtains the resistance value of the first resistor R1 according to the first detection voltage.

[0081] In this embodiment, the information interaction system further includes a third resistor R3, a fourth resistor R4 and a second control line D2, the third resistor R3 and the fourth resistor R4 are sequentially connected in series between the second reference voltage V2 and the common line G, and the resistance value of the third resistor R3 is adjusted according to the third resistance adjustment signal sent by the powered device;

[0082] The second control line D2 is disposed at the common end of the third resistor R3 and the fourth resistor R4 and connected to the power supply device for outputting a second detection voltage to the power supply device so that the power supply device obtains the resistance value of the third resistor R3 according to the second detection voltage.

[0083] In this embodiment, the information interaction system also includes a fourth switch element K4, an input end of the fourth switch element K4 is electrically connected to the first control line D1, an output end of the fourth switch element K4 is electrically connected to the second control line D2, and a control end of the fourth switch element K4 is electrically connected to the power supply device to receive a fourth switch signal output by the power supply device to be turned on or off, thereby adjusting the voltage value of the second detection voltage of the second control line D2, so that the powered device obtains different switching states of the fourth switch element K4 according to the second detection voltage.

[0084] In this embodiment, the information interaction system further includes a power line E, through which the power supply device transmits an electrical voltage to the powered device.

[0085] exist Figure 1 , Figure 6 and Fig. 9 Based on the implementation principle of the embodiment, this embodiment can implement a single voltage adjustment solution to achieve two-way handshake communication between the powered device and the power supply device, so that the powered device requests the power supply device to change the transmission voltage by changing the resistance values ​​of the first resistor R1 and the second resistor R2.

[0086] Specifically, the resistance of the first resistor R1 is above 2M ohms, the resistance of the third resistor R3 is above 2M ohms, the first reference voltage V1 is 2.8V, the second reference voltage V2 is 2.8V, the resistance of the second resistor R2 is 400K ohms, the resistance of the fourth resistor R4 is 20K ohms, the fourth switch element K4 is in the on state by default, the first control line D1 and the second control line D2 are short-circuited, and the power line E outputs a voltage of 5V by default.

[0087] When the powered device needs to adjust the transmission voltage of the power line E, the powered device outputs a first resistor R1 adjustment signal to adjust the resistance of the first resistor R1 to the range of 60K-90K, thereby increasing the first detection voltage on the first control line D1 and the second detection voltage on the second detection line. The power supply device thus detects that the resistance of the first resistor R1 is in the range of 50K-100K and lasts for 1.5s, and then determines that the powered device needs to adjust the voltage of the power line E. In response to this request, the power supply device outputs a fourth switch signal, disconnects the fourth switch K4, and enters the transmission voltage adjustment mode. At this time, since the first control line D1 and the second control line D2 are no longer short-circuited, the second detection voltage on the second control line D2 drops.

[0088] When the powered device detects that the second detection voltage is less than 0.375V, it receives the disconnection information of the fourth switch K4, and determines that the power supply device supports the voltage adjustment of the power line E. When the powered device requests to increase the voltage of the power line E, it outputs the third resistor R3 adjustment signal to adjust the resistance value of the third resistor R3 to the range of 60K-90K, thereby increasing the second detection voltage on the second control line D2. When the power supply device detects that the resistance values ​​of the first resistor R1 and the third resistor R3 are both in the range of 50K-100K, it adjusts the transmission voltage on the power line E to 9V.

[0089] In the single voltage adjustment scheme of this embodiment, the transmission voltage on the power line E is adjusted from low to high. In other embodiments, the transmission voltage may also be adjusted from high to low.

[0090] This embodiment can also implement a voltage step adjustment scheme to achieve two-way handshake communication between the power supply device and the powered device, so that the powered device requests the power supply device to change the output voltage on the power line E by changing the resistance values ​​of the first resistor R1 and the third resistor R3.

[0091] Specifically, the resistance of the first resistor R1 is above 2M ohms, the resistance of the third resistor R3 is above 2M ohms, the first reference voltage V1 is 2.8V, the second reference voltage V2 is 2.8V, the resistance of the second resistor R2 is 400K ohms, the resistance of the fourth resistor R4 is 20K ohms, the fourth switch element K4 is in the on state by default, the first control line D1 and the second control line D2 are short-circuited, and the power line E outputs a voltage of 5V by default.

[0092] When the powered device needs to adjust the transmission voltage of the power line E, the powered device outputs a first resistor R1 adjustment signal to adjust the resistance of the first resistor R1 to the range of 60K-90K ohms, thereby increasing the first detection voltage on the first control line D1 and the second detection voltage on the second detection line. The power supply device thus detects that the resistance of the first resistor R1 is in the range of 50K-100K ohms and lasts for 1.5 seconds, and then determines that the powered device needs to adjust the voltage of the power line E. In response to this request, the power supply device outputs a fourth switch signal, and the fourth switch K4 is disconnected, entering the transmission voltage step adjustment mode. At this time, since the first control line D1 and the second control line D2 are no longer short-circuited, the second detection voltage on the second control line D2 drops.

[0093] When the powered device detects that the second detection voltage is less than 0.375V, it receives the disconnection information of the fourth switch K4, determines that the power supply device supports the voltage adjustment of the power line E, and outputs the third resistor R3 adjustment signal to adjust the resistance of the third resistor R3 to the range of 60K-90K ohms.

[0094] When the powered device requests to increase the transmission voltage of the power line E, it outputs the first resistor R1 adjustment signal to adjust the resistance of the first resistor R1 to the range of 0.3K-0.5K ohms and last for 1ms-4ms, thereby increasing the first detection voltage on the first control line D1 and then returning to the range of 60K-90K ohms. When the power supply device detects that the resistance of the first resistor R1 is in the range of 0.2K-0.6K ohms and lasts for 0.5ms-5ms, and then returns to 50K-100K ohms, it increases the transmission voltage on the power line E by 80mV. After reaching the output upper limit, the transmission voltage no longer responds to the change of the resistance of the first resistor R1.

[0095] When the powered device requests to reduce the transmission voltage of the power line E, the third resistor R3 adjustment signal is output to adjust the resistance of the third resistor R3 to above 1.1M ohms and last for 1ms-4ms, thereby reducing the second detection voltage on the second control line D2 and then returning to the 60K-90K ohm range. When the power supply device detects that the resistance of the third resistor R3 is greater than 1M ohm and lasts for 0.5ms-5ms, and then returns to 50K-100K ohms, the transmission voltage on the power line E is reduced by 80mV. After reaching the output lower limit, the transmission voltage no longer responds to the change of the resistance of the third resistor R3.

[0096] On the basis of the above embodiments, further, Fig.12 A circuit diagram of an information interaction system according to an embodiment of the present invention Figure 102. In one embodiment, the information interaction system further includes a second switch element K2. The input end of the second switch element K2 is electrically connected to the first control line D1, and the output end of the second switch element K2 is electrically connected to the common line G. The first resistor R1 and the second resistor R2 are connected in series between the first reference voltage V1 and the common line G in sequence, and the control end of the second switch element K2 is electrically connected to the powered device to receive the second control signal of the powered device and turn it on or off, thereby adjusting the voltage value of the first detection voltage of the first control line D1, so that the power supply device obtains different switch states of the second switch element K2 according to the first detection voltage.

[0097] In this embodiment, the resistance value of the second resistor R2 is adjusted according to the second resistance adjustment signal sent by the first mechanism 1. The first control line D1 is connected to the powered device and is also used to output a first detection voltage to the powered device so that the powered device obtains the resistance value of the second resistor R2 according to the first detection voltage.

[0098] In this embodiment, the resistance value of the fourth resistor R4 is adjusted according to the fourth resistance adjustment signal sent by the power supply device. The second control line D2 is provided at the common end of the third resistor R3 and the fourth resistor R4, and is connected to the powered device, and is used to output the second detection voltage to the powered device, so that the powered device obtains the resistance value of the fourth resistor R4 according to the second detection voltage.

[0099] In this embodiment, the information interaction system further includes a fifth switch element K5. The third resistor R3 and the fourth resistor R4 are sequentially connected in series between the second reference voltage V2 and the common line G. The input end of the fifth switch element K5 is electrically connected to the second control line D2, and the output end of the fifth switch element K5 is electrically connected to the common line G. The control end of the fifth switch element K5 is electrically connected to the powered device to receive the fifth control signal of the powered device and turn it on or off, thereby adjusting the output of the second detection voltage to the power supply device, so that the power supply device obtains different switch states of the fifth switch element K5 according to the second detection voltage.

[0100] exist Figure 1 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Fig. 9 , Fig.10 and Fig.11 Based on the implementation principle of the embodiment, this embodiment can realize a full-time bidirectional dual-channel digital communication mode between the power supply device and the powered device. In this mode, the powered device can adjust the transmission voltage output by the power supply device to the power line E, and the output power upper limit and other parameters. The power supply device can read the product information, manufacturer information, production batch information, alarm status, protection status and other information of the powered device.

[0101] Specifically, the resistance of the first resistor R1 is above 2M ohms, the resistance of the third resistor R3 is above 2M ohms, the first reference voltage V1 is 2.8V, the second reference voltage V2 is 2.8V, the resistance of the second resistor R2 is 400K ohms, the resistance of the fourth resistor R4 is 20K ohms, the fourth switch element K4 is in the on state by default, the first control line D1 and the second control line D2 are short-circuited, and the power line E outputs a voltage of 5V by default.

[0102] When the powered device needs to communicate, the powered device outputs a first resistor R1 adjustment signal to adjust the resistance of the first resistor R1 to the range of 60K-90K ohms, thereby increasing the first detection voltage on the first control line D1 and the second detection voltage on the second detection line. The power supply device thus detects that the resistance of the first resistor R1 is in the range of 50K-100K ohms and lasts for 1.5s, then determines that the powered device needs to communicate, outputs a fourth switch signal, and disconnects the fourth switch K4. When the power supply device needs to communicate, it outputs a fourth switch signal to disconnect the fourth switch K4. When the powered device detects that the second detection voltage is less than 0.375V, it receives the disconnection information of the fourth switch K4, then determines that the power supply device supports communication, outputs a third resistor R3 adjustment signal to adjust the resistance of the third resistor R3 to the range of 60K-90K ohms; the power supply device outputs a second resistance adjustment signal and a fourth resistance adjustment signal to adjust the resistance of the second resistor R2 and the fourth resistor R4 to the range of 9K-11K ohms at the same time, so that the power supply device and the powered device can communicate.

[0103] When the power receiving module needs to send a 1 signal through the first control line D1, it outputs a first resistor R1 adjustment signal to adjust the first resistor R1 to the range of 1.5K-5.1K ohms; it outputs a second switch signal to disconnect the second switch K2. At this time, when the power supply module detects that the resistance value of the first resistor R1 is in the range of 1K-6K ohms, it is considered to have received a 1 signal. When the power receiving module needs to send a 0 signal through the first control line D1, it outputs a second switch signal to turn on the second switch K2, thereby connecting the first control line D1 to the common reference ground. At this time, when the power supply module cannot detect the resistance value of the first resistor R1, it is considered to have received a 0 signal.

[0104] When the power receiving module needs to send a 1 signal through the second control line D2, it outputs a third resistor R3 adjustment signal to adjust the third resistor R3 to the range of 1.5K-5.1K ohms; outputs a fifth switch signal to disconnect the fifth switch K5. At this time, when the power supply module detects that the resistance value of the third resistor R3 is in the range of 1K-6K ohms, it is deemed to have received a 1 signal. When the power receiving module needs to send a 0 signal through the second control line D2, it outputs a fifth switch signal to turn on the fifth switch K5, thereby connecting the second control line D2 to the common reference ground. At this time, when the power supply module cannot detect the resistance value of the third resistor R3, it is deemed to have received a 0 signal.

[0105] When the power supply module needs to send a 1 signal through the first control line D1, it outputs a second resistance adjustment signal to adjust the resistance of the second resistor R2 to 20K ohms. When the power receiving module detects that the resistance of the second resistor R2 is above 15K ohms, it is deemed to have received a 1 signal. When the power supply module needs to send a 0 signal through the first control line D1, it outputs a second resistance adjustment signal to adjust the resistance of the second resistor R2 to the range of 0.2K-0.6K ohms. When the power receiving module detects that the resistance of the second resistor R2 is in the range of 0K-1K ohms, it is deemed to have received a 0 signal.

[0106] When the power supply module needs to send a 1 signal through the second control line D2, it outputs a fourth resistance adjustment signal to adjust the resistance of the fourth resistor R4 to 20K ohms. When the power receiving module detects that the resistance of the fourth resistor R4 is above 15K ohms, it is deemed to have received a 1 signal. When the power supply module needs to send a 0 signal through the second control line D2, it outputs a fourth resistance adjustment signal to adjust the resistance of the fourth resistor R4 to the range of 0.2K-0.6K ohms. When the power receiving module detects that the resistance of the fourth resistor R4 is in the range of 0K-1K ohms, it is deemed to have received a 0 signal.

[0107] In a second aspect, the present invention provides a powered device communication circuit.

[0108] Fig.13 A circuit for a communication circuit of a powered device according to an embodiment of the present invention Figure 1 In one embodiment, a powered device communication circuit includes a powered device, a common line G, a first resistor R1, a second resistor R2, and a first control line D1.

[0109] The powered device establishes a voltage reference through the common line G. The first resistor R1 and the second resistor R2 are connected in series between the first reference voltage V1 and the common line G in sequence, and the resistance value of the first resistor R1 is adjusted according to the first resistance adjustment signal sent by the powered device. The first control line D1 is set at the common end of the first resistor R1 and the second resistor R2, and is used to output a first detection voltage so that the powered device outputs the resistance value information of the first resistor R1 through the first control line D1. Reference Figure 1 In the embodiment, it is known that the resistance of the second resistor R2 is Rd. In the case of the first reference voltage V1, when the first reference voltage Vd on the first control line D1 is detected, the resistance of the first resistor R1 can be calculated to be Rp=Rd*(V1 / Vd-1).

[0110] Please refer to Figure 2 and Fig.13Embodiment, in another embodiment, the first resistor R1 and the second resistor R2 are connected in series between the first reference voltage V1 and the common line G in reverse order. Similar to the above embodiment, the powered device can also output the resistance value information of the first resistor R1 through the first control line D1.

[0111] Fig.14 A circuit for a communication circuit of a powered device according to an embodiment of the present invention Figure 2 In one embodiment, on the basis of the above embodiment, the communication circuit of the powered device further includes a second switch element K2. The input end of the second switch element K2 is electrically connected to the first control line D1, and the output end of the second switch element K2 is electrically connected to the common line G. The first resistor R1 and the second resistor R2 are connected in series between the first reference voltage V1 and the common line G in sequence, and the control end of the second switch element K2 is electrically connected to the powered device to receive the second control signal of the powered device and be turned on or off, thereby adjusting the voltage value of the first detection voltage of the first control line D1, so that the powered device outputs the switch state information of the second switch element K2 through the first control line D1.

[0112] Fig.15 A circuit for a communication circuit of a powered device according to an embodiment of the present invention Figure 3 . In one embodiment, based on the above embodiment, the communication circuit of the powered device further includes a third resistor R3, a fourth resistor R4 and a second control line D2. Wherein: the third resistor R3 and the fourth resistor R4 are sequentially connected in series between the second reference voltage V2 and the common line G, and the resistance value of the third resistor R3 is adjusted according to the third resistance adjustment signal sent by the powered device. The second control line D2 is provided at the common end of the third resistor R3 and the fourth resistor R4, and is used to output a second detection voltage so that the powered device outputs the resistance value information of the third resistor R3 through the second control line D2. Please refer to Figure 1 and Fig.13 In the embodiment, when the resistance value of the fourth resistor R4 and the second reference voltage V2 are known, when the second reference voltage on the second control line D2 is detected, the resistance value of the third resistor R3 can be calculated accordingly.

[0113] In another embodiment, the third resistor R3 and the fourth resistor R4 are connected in series between the second reference voltage V2 and the common line G in reverse order. Similar to the above embodiment, the powered device can also output the resistance value information of the third resistor R3 through the second control line D2.

[0114] Fig.16 A circuit for a communication circuit of a powered device according to an embodiment of the present invention Figure 4. In one embodiment, on the basis of the above embodiment, the communication circuit of the powered device further includes a third resistor R3, a fourth resistor R4, a second control line D2 and a fifth switch tube K5. Wherein: the third resistor R3 and the fourth resistor R4 are sequentially connected in series between the second reference voltage V2 and the common line G, and the second control line D2 is provided at the common end of the third resistor R3 and the fourth resistor R4, for outputting the second detection voltage. The input end of the fifth switch element K5 is electrically connected to the second control line D2, the output end of the fifth switch element K5 is electrically connected to the common line G, and the control end of the fifth switch element K5 is electrically connected to the powered device to receive the second control signal of the powered device and turn on or off, thereby adjusting the voltage value of the second detection voltage of the second control line D2, so that the powered device outputs the switch state information of the fifth switch element K5 through the second control line D2. Please refer to Fig.10 Principle of the embodiment: In this circuit, the powered device can output information through different switch states of the fifth switch element K5.

[0115] In a third aspect, the present invention further provides a communication circuit for a power supply device.

[0116] Fig.17 A circuit for a power supply device communication circuit according to an embodiment of the present invention Figure 1 . In this embodiment, the power supply device communication circuit includes a power supply device, a common line G, a first resistor R1, a second resistor R2 and a first control line D1. Wherein: the power supply device establishes a voltage reference through the common line G. The first resistor R1 and the second resistor R2 are connected in series in sequence between the first reference voltage V1 and the common line G, and the first resistor R1 is a resistor with adjustable resistance value. The first control line D1 is provided at the common end of the first resistor R1 and the second resistor R2 and is electrically connected to the power supply device, and is used to output a first detection voltage to the power supply device, so that the power supply device obtains the resistance value of the first resistor R1 according to the first detection voltage. Please refer to Figure 1 According to the embodiment principle, the resistance of the second resistor R2 is known to be Rd. Under the condition of the first reference voltage V1, when the first reference voltage Vd on the first control line D1 is detected, the power supply device calculates the resistance of the first resistor R1 to be Rp=Rd*(V1 / Vd-1).

[0117] Please refer to Figure 2 and Fig.17 Embodiment, in another embodiment, the first resistor R1 and the second resistor R2 are connected in series in reverse order between the first reference voltage V1 and the common line G. Similar to the above embodiment, the power supply device can also obtain the resistance value information of the first resistor R1 through the first control line D1.

[0118] Fig.18 A circuit for a power supply device communication circuit according to an embodiment of the present invention Figure 2 Please refer to Figure 5Principle of the embodiment, in one embodiment, based on the above embodiment, the resistance value of the second resistor R2 is adjusted according to the second resistance adjustment signal sent by the power supply device, thereby changing the first detection voltage of the first control line D1, so that the power supply device outputs the resistance value information of the second resistor R2 through the first control line D1.

[0119] Fig.19 A circuit for a power supply device communication circuit according to an embodiment of the present invention Figure 3 Please refer to Figure 7 Principle of the embodiment, in one embodiment, based on the above embodiment, the power supply device communication circuit also includes a third resistor R3, a fourth resistor R4 and a second control line D2. Wherein: the third resistor R3 and the fourth resistor R4 are connected in series between the second reference voltage V2 and the common line G in sequence, and the second control line D2 is provided at the common end of the third resistor R3 and the fourth resistor R4, and is used to output the second detection voltage. The resistance value of the fourth resistor R4 is adjusted according to the fourth resistance adjustment signal sent by the power supply device, thereby changing the second detection voltage of the second control line D2, so that the power supply device outputs the resistance value information of the fourth resistor R4 through the second control line D2.

[0120] In another embodiment, the third resistor R3 and the fourth resistor R4 are connected in series in reverse order between the second reference voltage V2 and the common line G, and the resistance value of the fourth resistor R4 is adjusted according to the fourth resistance adjustment signal sent by the power supply device, thereby changing the second detection voltage of the second control line D2, and also enabling the power supply device to output the resistance value information of the fourth resistor R4 through the second control line D2.

[0121] Fig. 20 A circuit for a power supply device communication circuit according to an embodiment of the present invention Figure 4 Please refer to Fig. 9 Principle of the embodiment, in one embodiment, on the basis of the above embodiment, the communication circuit of the power supply device further includes a third resistor R3, a fourth resistor R4, a second control line D2 and a fourth switch K4. Wherein: the third resistor R3 and the fourth resistor R4 are connected in series between the second reference voltage V2 and the common line G in sequence, and the second control line D2 is provided at the common end of the third resistor R3 and the fourth resistor R4, and is used to output the second detection voltage. The input end of the fourth switch K4 is electrically connected to the first control line D1, and the output end of the fourth switch K4 is electrically connected to the second control line D2. The control end of the fourth switch K4 is electrically connected to the power supply device to receive the fourth switch signal output by the power supply device and turn it on or off, thereby adjusting the voltage value of the second detection voltage of the second control line D2, so that the power supply device outputs the switch state information of the fourth switch K4 through the second control line D2.

[0122] In another embodiment, the third resistor R3 and the fourth resistor R4 are connected in series in reverse order between the second reference voltage V2 and the common line G, and the control end of the fourth switch element K4 is electrically connected to the power supply device to receive the fourth switch signal output by the power supply device to be turned on or off, thereby adjusting the voltage value of the second detection voltage of the second control line D2, and also allowing the power supply device to output the switch status information of the fourth switch element K4 through the second control line D2.

[0123] In the above embodiments, the first reference voltage V1 and the second reference voltage V2 may be the same or different.

[0124] The voltage, resistance and duration values ​​provided in the above embodiments are for reference only and may be set to other values ​​in other embodiments.

[0125] In the above embodiments, the resistor may be an equivalent resistor composed of multiple resistors.

[0126] In the above embodiments, the types of resistors whose resistance can be adjusted may be thermistors, photoresistors, varistors, gas resistors, etc., and the resistance may also be adjusted by a resistor or a resistor string under the control of a switching circuit; accordingly, the resistance adjustment signal is also a corresponding control signal.

[0127] In the above embodiments, the switch element may be any controllable switch element such as a transistor, a field effect transistor, a relay, etc.

[0128] The information interaction system, the communication circuit of the power receiving device and the communication circuit of the power supply device provided by the present invention can utilize a simple communication line to detect the resistance value, exchange information and synchronize, so as to ensure the communication between the devices. It has the advantages of simple circuit, low cost and reliable communication.

[0129] In this document, unless otherwise specified or limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0130] In this document, the ordinal adjectives “first”, “second”, etc. used to describe elements are only used to distinguish elements with similar attributes, and do not mean that the elements described in this way must follow a given order, or time, space, level or other limitations.

[0131] As used herein, unless otherwise specified, “plurality” or “several” means two or more.

[0132] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0133] In this document, the terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of elements other than those listed and may also include additional elements not expressly listed.

[0134] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An information interaction system, characterized in that: It includes a first mechanism, a second mechanism, a common line, a first resistor, a second resistor and a first control line; The first mechanism is connected to the second mechanism via the common line to establish a voltage reference; The first resistor and the second resistor are connected in series between the first reference voltage and the common line in sequence or in reverse sequence, and the resistance value of the first resistor is adjusted according to the first resistance adjustment signal sent by the second mechanism to transmit information to the first mechanism; The first control line is arranged at a common end of the first resistor and the second resistor, and is connected to the first mechanism, and is used to output a first detection voltage to the first mechanism, so that the first mechanism obtains the resistance value of the first resistor according to the first detection voltage and the first reference voltage, and makes a corresponding response according to the resistance value of the first resistor.

2. The information interaction system according to claim 1, characterized in that: It also includes a first switch component, the first control line is connected to the second mechanism, and is used to output the first detection voltage to the second mechanism, the input end of the first switch component is electrically connected to the first control line, the output end of the first switch component is electrically connected to the common line, and the control end of the first switch component is electrically connected to the first mechanism to receive a first switch signal output by the first mechanism to be turned on or off, thereby adjusting the voltage value of the first detection voltage output by the first control line, so that the second mechanism obtains the switching state of the first switch component according to the first detection voltage.

3. The information interaction system according to claim 1, characterized in that: It also includes a second switch element, the input end of the second switch element is electrically connected to the first control line, the output end of the second switch element is electrically connected to the common line, and when the first resistor and the second resistor are connected in series between the first reference voltage and the common line in sequence, the control end of the second switch element is electrically connected to the second mechanism to receive a second control signal of the second mechanism to be turned on or off, thereby adjusting the voltage value of the first detection voltage of the first control line, so that the first mechanism obtains the switching state of the second switch element according to the first detection voltage.

4. The information interaction system according to claim 1, characterized in that: The resistance value of the second resistor is adjusted according to the second resistance adjustment signal sent by the first mechanism, and the first control line is connected to the second mechanism for outputting the first detection voltage to the second mechanism so that the second mechanism obtains the resistance value of the second resistor according to the first detection voltage.

5. The information interaction system according to claim 1, characterized in that: Also includes a third resistor, a fourth resistor and a second control line; The third resistor and the fourth resistor are connected in series between the second reference voltage and the common line in sequence or in reverse sequence, and the resistance value of the third resistor is adjusted according to the third resistance adjustment signal sent by the second mechanism; The second control line is provided at a common end of the third resistor and the fourth resistor and is connected to the first mechanism for outputting a second detection voltage to the first mechanism so that the first mechanism obtains the resistance value of the third resistor according to the second detection voltage.

6. The information interaction system according to claim 1, characterized in that: It also includes a third resistor, a fourth resistor and a second control line, wherein the third resistor and the fourth resistor are connected in series between the second reference voltage and the common line in sequence or in reverse sequence, and the resistance value of the fourth resistor is adjusted according to a fourth resistance adjustment signal sent by the first mechanism; The second control line is arranged at a common end of the third resistor and the fourth resistor and connected to the second mechanism for outputting a second detection voltage to the second mechanism so that the second mechanism obtains the resistance value of the fourth resistor according to the second detection voltage.

7. The information interaction system according to claim 1, characterized in that: Also includes a third resistor, a fourth resistor, a second control line and a third switch element; The third resistor and the fourth resistor are connected in series between the second reference voltage and the common line in sequence or in reverse sequence. The second control line is arranged at the common end of the third resistor and the fourth resistor and is connected to the second mechanism for outputting a second detection voltage to the second mechanism. The input end of the third switch element is electrically connected to the second control line, the output end of the third switch element is electrically connected to the common line, and the control end of the third switch element is electrically connected to the first mechanism to receive the third switch signal output by the first mechanism to be turned on or off, thereby adjusting the voltage value of the second detection voltage of the second control line so that the second mechanism obtains the switching state of the third switch element according to the second detection voltage.

8. The information interaction system according to claim 1, characterized in that: It also includes a third resistor, a fourth resistor, a second control line and a fourth switch element, wherein the third resistor and the fourth resistor are connected in series between the second reference voltage and the common line in sequence or in reverse sequence, the second control line is arranged at the common end of the third resistor and the fourth resistor, and is connected to the second mechanism for outputting a second detection voltage to the second mechanism; the input end of the fourth switch element is electrically connected to the first control line, the output end of the fourth switch element is electrically connected to the second control line, and the control end of the fourth switch element is electrically connected to the first mechanism to receive a fourth switch signal output by the first mechanism to be turned on or off, thereby adjusting the voltage value of the second detection voltage of the second control line, so that the second mechanism obtains the switching state of the fourth switch element according to the second detection voltage.

9. The information interaction system according to claim 1, characterized in that: It also includes a third resistor, a fourth resistor, a second control line and a fifth switch element, wherein the third resistor and the fourth resistor are connected in series between the second reference voltage and the common line in sequence, the second control line is arranged at the common end of the third resistor and the fourth resistor, and is connected to the first mechanism, and is used to output a second detection voltage to the first mechanism; the input end of the fifth switch element is electrically connected to the second control line, the output end of the fifth switch element is electrically connected to the common line, and the control end of the fifth switch element is electrically connected to the second mechanism, so as to receive the fifth control signal of the second mechanism and be turned on or off, thereby adjusting the output of the second detection voltage to the first mechanism, so that the first mechanism obtains the switching state of the fifth switch element according to the second detection voltage.

10. The information interaction system according to any one of claims 1 to 9, wherein the first mechanism is a power supply device, and the second mechanism is a power receiving device.

11. A powered device communication circuit, characterized in that: The device comprises a powered device, a common line, a first resistor, a second resistor and a first control line, wherein: The powered device establishes a voltage reference via the common line; The first resistor and the second resistor are connected in series between the first reference voltage and the common line in sequence or in reverse sequence, and the resistance value of the first resistor is adjusted according to the first resistance adjustment signal sent by the powered device to transmit information to the power supply device; The first control line is arranged at a common end of the first resistor and the second resistor, and is used to output a first detection voltage, so that the powered device outputs resistance value information of the first resistor through the first control line. The resistance value information of the first resistor is obtained based on the first detection voltage and the first reference voltage, and is used to enable the power supply device to make a corresponding response.

12. The powered device communication circuit according to claim 11, wherein: It also includes a second switch element, wherein the input end of the second switch element is electrically connected to the first control line, the output end of the second switch element is electrically connected to the common line, and when the first resistor and the second resistor are sequentially connected in series between the first reference voltage and the common line, the control end of the second switch element is electrically connected to the powered device to receive a second control signal of the powered device to be turned on or off, thereby adjusting the voltage value of the first detection voltage of the first control line, so that the powered device outputs the switch state information of the second switch element through the first control line.

13. The powered device communication circuit according to claim 11, wherein: Also includes a third resistor, a fourth resistor and a second control line, wherein: The third resistor and the fourth resistor are connected in series between the second reference voltage and the common line in sequence or in reverse sequence, and the resistance value of the third resistor is adjusted according to a third resistance adjustment signal sent by the powered device; The second control line is provided at a common end of the third resistor and the fourth resistor, and is used to output a second detection voltage so that the powered device outputs resistance value information of the third resistor through the second control line.

14. The powered device communication circuit according to claim 11, wherein: It also includes a third resistor, a fourth resistor, a second control line and a fifth switch element, wherein: The third resistor and the fourth resistor are connected in series in sequence between the second reference voltage and the common line, and the second control line is provided at the common end of the third resistor and the fourth resistor for outputting a second detection voltage; The input end of the fifth switch element is electrically connected to the second control line, the output end of the fifth switch element is electrically connected to the common line, and the control end of the fifth switch element is electrically connected to the powered device to receive a second control signal of the powered device to be turned on or off, thereby adjusting the voltage value of the second detection voltage of the second control line, so that the powered device outputs the switch state information of the fifth switch element through the second control line.

15. A communication circuit for power supply equipment, characterized in that: It includes a power supply device, a common line, a first resistor, a second resistor and a first control line, wherein: The power supply device establishes a voltage reference via the common line; The first resistor and the second resistor are connected in series between the first reference voltage and the common line in sequence or in reverse sequence, the first resistor is an adjustable resistance resistor, and the resistance value of the first resistor is adjusted according to a first resistance adjustment signal sent by the powered device to transmit information to the power supply device; The first control line is arranged at a common end of the first resistor and the second resistor and is electrically connected to the power supply device, and is used to output a first detection voltage to the power supply device, so that the power supply device obtains the resistance value of the first resistor according to the first detection voltage and the first reference voltage, and makes a corresponding response according to the resistance value of the first resistor.

16. The power supply equipment communication circuit according to claim 15, characterized in that: The resistance value of the second resistor is adjusted according to the second resistance adjustment signal sent by the power supply device, thereby changing the first detection voltage of the first control line, so that the power supply device outputs the resistance value information of the second resistor through the first control line.

17. The power supply equipment communication circuit according to claim 15, characterized in that: Also includes a third resistor, a fourth resistor and a second control line, wherein: The third resistor and the fourth resistor are connected in series between the second reference voltage and the common line in sequence or in reverse sequence, and the second control line is provided at the common end of the third resistor and the fourth resistor for outputting a second detection voltage; The resistance value of the fourth resistor is adjusted according to the fourth resistance adjustment signal sent by the power supply device, thereby changing the second detection voltage of the second control line, so that the power supply device outputs the resistance value information of the fourth resistor through the second control line.

18. The power supply equipment communication circuit according to claim 15, characterized in that: It also includes a third resistor, a fourth resistor, a second control line and a fourth switch element, wherein: The third resistor and the fourth resistor are connected in series between the second reference voltage and the common line in sequence or in reverse sequence, and the second control line is provided at the common end of the third resistor and the fourth resistor for outputting a second detection voltage; The input end of the fourth switch element is electrically connected to the first control line, the output end of the fourth switch element is electrically connected to the second control line, and the control end of the fourth switch element is electrically connected to the power supply device to receive a fourth switch signal output by the power supply device to be turned on or off, thereby adjusting the voltage value of the second detection voltage of the second control line, so that the power supply device outputs the switch status information of the fourth switch element through the second control line.

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