Data line, charger and docking station

Abstract

The utility model provides a data line, and a charger and a docking station comprising the data line. The data line comprises a transmission wire, an input interface and an output interface which are arranged at two ends of the transmission wire, and a sampling module and a control module which are arranged on any interface, a current transformer is adopted to replace a traditional sampling resistor and is connected with the input interface and the control module of the data line, and after the input interface and the output interface are connected with a terminal, the current transformer is connected with the data line. And the sampling module is used for sensing current and / or voltage between the input interface and the output interface, generating a corresponding electric signal and outputting the electric signal to the control module so as to realize direct sampling of transmission current and / or transmission voltage of the data line in a working state. The transmission current and / or the transmission voltage are / is monitored through the current transformer, the current transformer can resist various electromagnetic interferences, the accuracy and the stability of a measurement result are ensured, the current and voltage measurement is not limited by use scenes and environmental conditions, and high-precision current and voltage measurement is provided.

Description

Technical Field

[0001] The utility model relates to the technical field of data transmission, in particular to a data cable, a charger and an expansion dock. Background Art

[0002] With the technological development of smart terminals such as mobile phones and tablets, smart terminals have become a necessary communication and social tool for almost everyone in modern society. For example, portable smart terminal mobile phones have become widely used terminal devices, and data cables have also become products inseparable from smart terminals.

[0003] In some data cables with digital display functions, when monitoring the transmission current and / or transmission voltage of the data cable during charging or data transmission, the most common method is to obtain the current in the data cable loop or the voltage on the sampling resistor through sampling resistors, amplify, filter and other processing of the sampled current or voltage signal, and then calculate the actual current value and / or voltage value according to a preset algorithm through a control module, and display it on a display screen.

[0004] However, due to the internal resistance of the sampling resistor itself, the data line may generate a certain degree of heat during operation, and the resistor itself will also release heat. As heat continues to accumulate over time, the resistance of the sampling resistor will drift with temperature. After the amplification process, the change in sampling accuracy will be sharply amplified, resulting in a decrease in sampling accuracy, making it impossible to achieve the purpose of accurately monitoring current and / or voltage values. Utility Model Content

[0005] The utility model provides a data cable, a charger and an expansion dock, which can solve the technical problem that when the existing data cable samples current through a sampling resistor, the sampling accuracy is reduced due to the influence of the environment and the data cable itself.

[0006] In a first aspect, an embodiment of the present application provides a data line, the data line comprising: used for charging and transmitting data to a connected terminal, characterized in that it comprises: a transmission wire, an input interface and an output interface arranged at both ends of the transmission wire, and a sampling module and a control module arranged on any of the interfaces;

[0007] The sampling module comprises a current transformer, the input end of the current transformer is connected to the input interface, and the output end of the sampling module is connected to the first input end of the control module; the sampling module is used to sense the current and / or voltage between the input interface and the output interface after the input interface and the output interface are connected to the terminal, generate a corresponding electrical signal, and output the electrical signal to the control module;

[0008] The control module is used to output a current value and / or a voltage value corresponding to the electrical signal to monitor the transmission current and / or transmission voltage of the data line in a working state.

[0009] In some embodiments, the sampling module includes a current transformer CT, a resistor R1 and a first filtering circuit;

[0010] The current transformer CT comprises a first end, a second end and a third end; the first end of the current transformer CT is connected to the input interface, and the second end of the current transformer CT is connected to the preset voltage end;

[0011] The resistor R1 includes a first end and a second end; the first end of the resistor R1 is connected to the third end of the current transformer CT, and the second end of the resistor R1 is connected to the first input end of the control module;

[0012] The first filter circuit includes a first end and a second end. The first end of the first filter circuit is connected to the first input end of the control module, and the second end of the first filter circuit is connected to the preset voltage end.

[0013] In some embodiments, the data line further includes an analog-to-digital converter;

[0014] The input end of the analog-to-digital converter is connected to the output end of the sampling module, and the output end of the analog-to-digital converter is connected to the second input end of the control module; the analog-to-digital converter is used to convert the electrical signal obtained from the sampling module from an analog signal to a digital signal, and output it to the control module.

[0015] In some embodiments, the analog-to-digital converter is built into the control module.

[0016] In some embodiments, the control module also includes a third input terminal connected to the input interface; the control module is used to read the charging power and / or data transmission rate of the data line charging the terminal after the input interface and the output interface are connected to the terminal.

[0017] In some embodiments, the data line further includes a voltage stabilization module and a transmission power regulation module;

[0018] The voltage stabilizing module is arranged between the input interface and the control module, and is used to provide a stable voltage to the control module;

[0019] The input end of the transmission power adjustment module is connected to the input interface and is used to mark and adjust the power transmission power or transmission rate of the data line.

[0020] In some embodiments, the data line also includes a display module connected to the control module; the display module is used to display the transmission parameters of the data line in a working state; the transmission parameters include transmission current, transmission voltage, transmission power and transmission rate.

[0021] In some embodiments, the data line further includes an indication module connected to the control module;

[0022] The indication module includes a plurality of indicator lights, which are used to provide indication functions with different indicator lights when the display module displays different transmission parameters.

[0023] In a second aspect, an embodiment of the present application provides a charger, characterized in that it includes an adapter for converting alternating current into direct current, and a data cable connected to the adapter, wherein the data cable is the data cable described in any embodiment of the present application.

[0024] In a third aspect, an embodiment of the present application provides a docking station, characterized in that it includes a docking station body having at least two data interfaces and a data cable connected to the docking station body, wherein the data cable is the data cable described in any embodiment of the present application.

[0025] The data cable provided by the embodiment of the present application, as well as the charger and docking station including the data cable, the sampling module of the data cable adopts a current transformer to replace the traditional sampling resistor, is connected to the input interface of the data cable, and based on the electromagnetic induction principle of the current transformer, after the input interface and the output interface are connected to the terminal, the current and / or voltage between the input interface and the output interface are sensed, a corresponding electrical signal is generated, and the electrical signal is output to the control module, so as to realize direct sampling of the transmission current and / or transmission voltage of the data cable in the working state. The data cable provided by the present application realizes the monitoring of the transmission current and / or transmission voltage through the current transformer, and the current transformer can resist various electromagnetic interferences, ensure the accuracy and stability of the measurement results, and is not limited to the use scenario and environmental conditions, and provides high-precision current and voltage measurement, which improves the product experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0027] Figure 1 A schematic diagram of the structure of a data line provided by an embodiment of the present application;

[0028] Figure 2 A structural schematic diagram of a data line provided in another embodiment of the present application;

[0029] Figure 3A structural schematic diagram of a data line provided in yet another embodiment of the present application;

[0030] Figure 4 A circuit diagram of a data line provided in one embodiment of the present application.

[0031] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0032] The present application is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0033] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0034] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally a class, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated before and after are in an "or" relationship. The "connection" and "connection" mentioned in the present application, unless otherwise specified, include direct and indirect connections (connections).

[0035] This application intends to use a current transformer to replace the traditional sampling resistor to sample the transmission current and / or transmission voltage. Based on the electromagnetic induction principle of the current transformer, after the input interface and the output interface are connected to the terminal, the current and / or voltage between the input interface and the output interface are sensed to generate a corresponding electrical signal, and the electrical signal is output to the control module to achieve direct sampling of the transmission current and / or transmission voltage of the data line in the working state. With the traditional sampling through the sampling resistor, due to the temperature drift phenomenon caused by the resistance value caused by the ambient temperature or the heat generated by itself, the change in the sampling accuracy will be sharply amplified after the amplification process, resulting in a decrease in sampling accuracy, and the technical problem of being unable to accurately monitor the current value or voltage value can be achieved.

[0036] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0037] Figure 1 This is a schematic diagram of the structure of a data line provided in an embodiment of the present application. For ease of explanation, only the part related to the embodiment of the present application is shown. Figure 1 As shown, the data cable provided in the embodiment of the present application is used to realize charging of an external terminal or data communication between two terminals through an adapter. The data cable includes a transmission wire 101, an input interface 102 and an output interface 103 arranged at both ends of the transmission wire, and a sampling module 104 and a control module 105 arranged on any of the interfaces.

[0038] In this embodiment, the sampling module 400 includes a current transformer, the input end of the current transformer is connected to the input interface, and the output end of the sampling module is connected to the first input end of the control module. The sampling module is used to sense the current and / or voltage between the input interface and the output interface after the input interface and the output interface are connected to the terminal, generate a corresponding electrical signal, and output the electrical signal to the control module.

[0039] The control module is used to output a current value and / or a voltage value corresponding to the electrical signal to monitor the transmission current and / or transmission voltage of the data line in a working state.

[0040] It can be understood that when the sampling module 400 and the control module 500 are arranged at the input interface, after the input interface and the output interface are connected to the terminal, the current in the data line flows in the order of: input interface, sampling module, control module, transmission wire to output interface. When the sampling module 400 and the control module 500 are arranged at the output interface, after the input interface and the output interface are connected to the terminal, the current in the data line flows in the order of: input interface, transmission wire, sampling module, control module to output interface.

[0041] Furthermore, the current and / or voltage between the input interface and the output interface collected by the current transformer generates a corresponding electrical signal, and the electrical signal is output to the control module. The control module is used to output the current value and / or voltage value corresponding to the electrical signal to monitor the transmission current and / or transmission voltage of the data line in the working state.

[0042] Current transformers can provide high-precision current measurement, with a measurement accuracy of up to 0.2 or higher, which is suitable for precise measurement and protection measurement. At the same time, current transformers can resist various electromagnetic interferences to ensure the accuracy and stability of measurement results. The secondary side of the current transformer can be open-circuited to directly provide digital signals to the measurement and protection system, and can be directly connected to secondary equipment for system integration, simplifying the design and installation of secondary equipment.

[0043] With the improvement of the design level of current transformers, the accuracy and reliability are getting better and better. The corresponding model can be determined according to the size of the detected current and the accuracy of the control. The current transformer is used to directly collect the current in the data line and transmit it to the control module. The control module can calculate the actual current value and / or voltage value of the data line according to the preset data processing rules to realize the monitoring of the transmission current and / or transmission voltage of the data line in the working state.

[0044] It should be noted that an MCU (Microcontroller Unit) may be used for specific implementation of the control module. The type and model of the control module are not limited in the embodiments of the present application. Any control device that can output a control signal after performing data processing according to the input information belongs to the protection scope of the control module described in the embodiments of the present application.

[0045] In summary, the data line provided in the embodiment of the present application adopts a current transformer to replace the traditional sampling resistor, which is connected to the input interface of the data line. Based on the electromagnetic induction principle of the current transformer, after the input interface and the output interface are connected to the terminal, the transmission current and / or transmission voltage of the data line in the working state are directly sampled. The transmission current and / or transmission voltage are monitored by the current transformer. The current transformer can resist various electromagnetic interferences, ensure the accuracy and stability of the measurement results, and is not limited to the use scenario and environmental conditions, providing high-precision current and voltage measurement, and improving the product experience.

[0046] Figure 2 This is a schematic diagram of the structure of a data line provided by another embodiment of the present application. Figure 3 As shown, the data line provided in the embodiment of the present application, based on any of the above embodiments, also includes an analog-to-digital converter 106 arranged between the acquisition module and the control module.

[0047] That is, the input end of the analog-to-digital converter is connected to the output end of the acquisition module, and the output end of the analog-to-digital converter is connected to the second input end of the control module, that is, the input end of the analog-to-digital converter 600 is connected to the output end of the current transformer, and is used to receive the electrical signal representing the transmission current and / or transmission voltage of the data line collected in real time by the current transformer. The electrical signal is an analog signal, which is converted into a digital signal by the analog-to-digital converter and then transmitted to the control module and output by the control module.

[0048] In some embodiments, when the control module adopts some MCU chips, it has an analog current acquisition terminal MCU_AD, which can directly convert the analog signal transmitted by the current transformer into a digital signal, so that the measured current can be received by converting the detected current into an isolated voltage signal through the current transformer instead of flowing directly through the control module.

[0049] It should be noted that in other embodiments of the present application, the analog-to-digital converter can also be integrated with the control module. In this case, the control module is internally integrated with the analog-to-digital converter, and there is no need to set up an additional analog-to-digital converter. In this case, the control module is directly connected to the current transformer. The separate setting or integrated setting between the analog-to-digital converter and the control module can be determined according to the specific type of the control module used, which is set according to actual use requirements and is not limited here.

[0050] In some embodiments, the data line further includes a voltage stabilization module 107 and a transmission power regulation module 108 .

[0051] In this embodiment, the voltage stabilizing module 107 is arranged between the input interface and the control module, and is used to stabilize the power supply voltage obtained from the power supply end of the input interface to the working voltage, and output it to the control module to provide the control module with the stable voltage required for normal operation.

[0052] In some embodiments, the voltage stabilizing module 107 includes but is not limited to a DC-DC voltage stabilizing unit and an LDO regulator (low dropout regulator). At this time, through the voltage stabilization of the voltage stabilizing module, the low voltage (such as 3.6V) using the QC protocol and the high voltage (such as 20V) using the PD protocol input by the input interface of the data line can be converted into the working voltage required for the normal operation of the control module, thereby avoiding the problem of damage to the control module caused by the voltage of the adapter input to the input interface of the data line being greater than the voltage required for the control module to operate.

[0053] It should be pointed out that in other embodiments of the present application, the voltage stabilizing module can also be integrated with the control module. In this case, the control module has an LDO voltage regulator integrated inside, so there is no need to set up an additional voltage stabilizing module. In this case, the control module can be directly connected to the input interface module. The separate setting or integrated setting between the control module and the voltage stabilizing module can be determined according to the specific type of the control module used, and it is set according to actual use requirements, which is not limited here.

[0054] In this embodiment, the transmission power adjustment module 108 is connected to the input interface and is used to mark and adjust the power transmission capability and data transmission speed of the cable of the data line.

[0055] In some embodiments, the transmission power regulation module 108 includes an e-marker chip, which can ensure that the transmission current of the cable exceeds 3A and supports USB3.0 data transmission, thereby meeting the needs of high-power and high-current fast charging. In terms of high-speed data transmission, high-definition video transmission, and powerful device power supply capabilities, the e-marker chip assists in achieving this by supporting multiple high-speed interface protocols (such as USB4, DisplayPort 1.4a TX, PCI Express, and Thunderbolt 4, etc.). In addition, the e-marker chip can also provide an electronic identity tag for the cable, including information such as power transmission capability, data transmission capability, video transmission capability, and ID, so that the output end (such as a charging head, a notebook) can adjust the matching voltage / current or audio and video signal according to the connected device (such as a mobile phone or a display).

[0056] Therefore, in some embodiments, the control module is also used to read the charging power and / or data transmission rate of the data line charging the terminal through the third input terminal after the input interface and the output interface are connected to the terminal, so as to monitor the charging power and / or data transmission rate of the data line in the working state.

[0057] Figure 3 This is a schematic diagram of the structure of a data line provided by another embodiment of the present application. Figure 3 As shown, the data line provided in the embodiment of the present application, based on any of the above embodiments, further includes a display module 109 and an indication module 110 respectively connected to the control module.

[0058] The display module is used to display the transmission parameters of the data line in the working state. Specifically, the transmission parameters include one or more of the transmission voltage, transmission current, transmission power and transmission rate.

[0059] The indication module includes a plurality of indicator lights, which are used to provide indication functions with different indicator lights when the display module displays different transmission parameters.

[0060] Figure 4 A circuit diagram of a data line provided by an embodiment of the present application. Figure 4 As shown, in a specific embodiment, the data line includes a transmission line 101, an input interface 102, an output interface 103, a sampling module 104, a control module 105, an analog-to-digital converter 106, a voltage stabilizing module 107, a transmission power adjustment module 108, a display module 109 and an indication module 110, wherein the transmission line 101 and the output interface 103 are not shown, and the analog-to-digital converter 106 is integrated in the control module 105. For ease of explanation, only the parts related to this embodiment are shown.

[0061] In this embodiment, the input interface 102 is a USB interface, which has at least a power supply VBUS terminal, a communication protocol CC terminal,

[0062] In other embodiments, the input interface 102 can also be a USB Type-A interface or a USB Type-C interface, and the corresponding output interface 103 can be a USB Type-C interface, a Micro-USB interface or a Lightning interface, so the type of data cable can be at least one of the following five types: 1) Type-A to Micro-USB charging data cable; 2) Type-A to Type-C charging data cable; 3) Type-A to Lightning charging data cable; 4) Type-C to Type-C charging data cable; 5) Type-C to Lightning charging data cable.

[0063] It should be noted that the data cable provided in the embodiment of the present application can also be other types of input interface 102 and output interface 103. In the embodiment of the present application, the type and model of the input interface 102 and output interface 103 in the data cable are not limited. All devices that can be used to connect the adapter to charge the terminal or transmit data through the input interface 102 and output interface 103 in the data cable belong to the protection scope of the data cable described in the embodiment of the present application.

[0064] In this embodiment, the sampling module includes a current transformer CT, which includes a first end, a second end and a third end. The first end of the current transformer CT is connected to the power supply VBUS end of the input interface, and the second end of the current transformer CT is connected to the preset voltage end, that is, grounded. The third end of the current transformer CT is connected to the 18th pin of the control module 105 through the resistor R1, that is, the third end of the current transformer J2 is connected to the first end of the resistor R1, and the second end of the resistor R4 is connected to the 18th pin of the control module 105, and the sensed current and / or voltage in the circuit is output to the control module.

[0065] In some embodiments, a first filtering circuit for filtering is also provided between the current transformer CT and pin 18 of the control module 105. Specifically, the first filtering circuit includes a resistor R2 and a capacitor C1 connected in parallel, and the first ends of the resistor R2 and the capacitor C1 are connected to pin 18 of the control module 105 (the second end of the resistor R4), and the second ends of the resistor R2 and the capacitor C1 are both connected to a preset voltage end (grounded).

[0066] The control module 105 adopts an MCU, which has a built-in analog-to-digital converter 106, which is set at its 19th pin, that is, the 19th pin of the control module 105 is the analog current acquisition terminal MCU_AD of the MUC, which can directly convert the analog signal transmitted by the current transformer into a digital signal, thereby realizing the conversion of the detected current into an isolated voltage signal for reception through the current transformer.

[0067] In some embodiments, a second filtering circuit for filtering is also provided at pin 19 of the control module 105. Specifically, the second filtering circuit includes a resistor R3 and a capacitor C2 connected in parallel. The first ends of the resistor R3 and the capacitor C2 are connected to pin 19 of the control module 105, and the second ends of the resistor R3 and the capacitor C2 are both connected to a preset voltage end (grounded).

[0068] In this embodiment, the voltage stabilizing module 107 uses an LDO voltage regulator chip, HT7550, whose input end is connected to the VBUS power supply end of the input interface, and the output end is connected to the 6-pin VCC of the control module, and the power supply voltage obtained from the power supply end of the input interface is stabilized to the working voltage, and output to the control module to provide the stable voltage required for normal operation. At the same time, the input and output ends of the voltage stabilizing module 107 are also provided with capacitors C3 and C4 for filtering. Specifically, the first end of the capacitor C3 is connected to the input end of the voltage stabilizing module 107, the second end of the capacitor C3 is grounded, the first end of the capacitor C4 is connected to the output end of the voltage stabilizing module 107, and the second end of the capacitor C4 is grounded.

[0069] In this embodiment, the transmission power adjustment module 108 uses an E-MARK chip to realize the power transmission power or transmission rate marking and adjustment of the data line. Specifically, the two input terminals of the E-MARK of the transmission power adjustment module 108 are respectively connected to the VCON and VCON1 terminals of the input interface, and the third input terminal is connected to the CC communication terminal of the input interface through the resistor R4.

[0070] In this embodiment, the D+ and D- ends of the input interface are respectively connected to pins 14 and 15 of the control module, and are used to read the charging power and / or data transmission rate of the data line to charge the terminal from the input interface, so as to monitor the charging power and / or data transmission rate of the data line in the working state.

[0071] In this embodiment, the display module 109 uses an LED display digital tube to connect with 6 pins of the control module, reads the transmission parameters of the data line in the working state from the control module, and displays them according to preset rules, including transmission current, transmission voltage, transmission power and transmission rate.

[0072] In this embodiment, the indication module 110 uses an LED indicator for indication, and the indication module 110 includes a resistor R5 and a light emitting diode D1 connected in series, a resistor R6 and a light emitting diode D2 connected in series, a resistor R7 and a light emitting diode D3 connected in series, and a capacitor C6. Specifically, the first ends of the resistors R5, R6, and R7 are connected to the output end of the voltage stabilizing module 107 to provide voltage for the indication module, and the first ends of the three are grounded through the capacitor C6, and the second ends of the light emitting diode D1, the light emitting diode D2, and the light emitting diode D3 are respectively connected to three different pins of the control module, and are controlled by the control module to emit light or not, so as to realize that when the display module displays different transmission parameters, different LED indicators are lit to provide indication.

[0073] In summary, the data line provided in the embodiment of the present application monitors the transmission current and / or transmission voltage through a current transformer, which solves the problem of inaccurate power measurement accuracy of the existing data line in actual work. At the same time, the data transmission rate of the input module is directly read through the control module to realize the detection of the data transmission rate, and the transmission parameters of the data line in the current state can be displayed in real time through the display module, that is, the transmission current, transmission voltage, data transmission rate, etc., thereby improving the user experience.

[0074] The present application also provides a charger, including a data cable and an adapter, wherein the data cable is the data cable in any of the above embodiments, and the adapter is used to convert alternating current into direct current. The charger includes the data cable in any of the above embodiments, and thus also has the advantages of the data cable in any of the above embodiments, which will not be described in detail here.

[0075] The embodiment of the present application also provides a docking station, including a data cable and a docking station body, wherein the data cable is the data cable in any of the above embodiments. The docking station includes the data cable in any of the above embodiments, so it also has the advantages of the data cable in any of the above embodiments, which will not be repeated here.

[0076] In some embodiments, the expansion dock may also include a connector and an expansion dock body, the connector includes a data cable of any of the above embodiments, and the connector and the expansion dock body may be connected via an internal data cable.

[0077] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the inspiration of the present application, ordinary technicians in the field can make several simple deductions, deformations or substitutions based on the ideas of the present application without departing from the scope of protection of the purpose of the present application and the claims. All of these are within the protection of the present application.

Claims

1. A data cable for charging and transmitting data to a connected terminal, characterized in that: include: A transmission wire, an input interface and an output interface arranged at both ends of the transmission wire, and a sampling module and a control module arranged on any of the interfaces; The sampling module comprises a current transformer, the input end of the current transformer is connected to the input interface, and the output end of the sampling module is connected to the first input end of the control module; the sampling module is used to sense the current and / or voltage between the input interface and the output interface after the input interface and the output interface are connected to the terminal, generate a corresponding electrical signal, and output the electrical signal to the control module; The control module is used to output a current value and / or a voltage value corresponding to the electrical signal to monitor the transmission current and / or transmission voltage of the data line in a working state.

2. The data line according to claim 1, characterized in that: The sampling module includes a current transformer CT, a resistor R1 and a first filtering circuit; The current transformer CT comprises a first end, a second end and a third end; the first end of the current transformer CT is connected to the input interface, and the second end of the current transformer CT is connected to the preset voltage end; The resistor R1 includes a first end and a second end; the first end of the resistor R1 is connected to the third end of the current transformer CT, and the second end of the resistor R1 is connected to the first input end of the control module; The first filter circuit includes a first end and a second end. The first end of the first filter circuit is connected to the first input end of the control module, and the second end of the first filter circuit is connected to the preset voltage end.

3. The data line according to claim 1, characterized in that: Also included is an analog-to-digital converter; The input end of the analog-to-digital converter is connected to the output end of the sampling module, and the output end of the analog-to-digital converter is connected to the second input end of the control module; the analog-to-digital converter is used to convert the electrical signal obtained from the sampling module from an analog signal to a digital signal, and output it to the control module.

4. The data line according to claim 3, characterized in that: The analog-to-digital converter is built in the control module.

5. The data line according to claim 1, characterized in that: The control module also includes a third input terminal connected to the input interface; the control module is used to read the charging power and / or data transmission rate of the data line charging the terminal after the input interface and the output interface are connected to the terminal.

6. The data line according to claim 1, characterized in that: It also includes a voltage stabilization module and a transmission power regulation module; The voltage stabilizing module is arranged between the input interface and the control module, and is used to provide a stable voltage to the control module; The input end of the transmission power adjustment module is connected to the input interface and is used to mark and adjust the power transmission power or transmission rate of the data line.

7. The data line according to claim 1, characterized in that: It also includes a display module connected to the control module; the display module is used to display the transmission parameters of the data line in the working state; the transmission parameters include transmission current, transmission voltage, transmission power and transmission rate.

8. The data line according to claim 7, characterized in that: Also included is an indication module connected to the control module; The indication module includes a plurality of indicator lights, which are used to provide indication functions with different indicator lights when the display module displays different transmission parameters.

9. A charger, characterized in that: It comprises an adapter for converting alternating current into direct current, and a data line connected to the adapter, wherein the data line is the data line as claimed in any one of claims 1 to 8.

10. A docking station, characterized in that: It comprises a docking station body having at least two data interfaces and a data cable connected to the docking station body, wherein the data cable is the data cable as claimed in any one of claims 1 to 8.

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