Sensor and data line power supply module

Abstract

The invention discloses a sensor and data line power supply module. The sensor comprises a sensor element, a signal processing module, a signal transceiving module and a data line power supply module. The sensor element is used for detecting a physical quantity of a detected object and converting the detected physical quantity into an electric signal. The signal processing module is connected with the sensor element, used for processing the electric signals and provided with a first communication interface used for outputting the electric signals. The signal transceiving module is provided with a second communication interface and a single-pair Ethernet interface, and the second communication interface is connected with the first communication interface. The single pair Ethernet interface is used for being connected with a single pair Ethernet device so as to transmit an electric signal through the single pair Ethernet. And the data line power supply module is used for being connected with a data line of the single-pair Ethernet so as to supply power to the sensor through the data line of the single-pair Ethernet. According to the invention, the data transmission rate and the data transmission distance can be improved, the structure of the sensor is simplified, and the cost is reduced.

Description

Technical Field

[0001] The invention relates to a sensor suitable for being connected to a single-pair Ethernet and a data line power supply module suitable for supplying power to various functional modules of the sensor through two data lines of the single-pair Ethernet. Background Art

[0002] In the prior art, sensors usually use wireless communication or wired communication. For example, wireless sensors usually use Bluetooth communication or Lora communication. Wired sensors usually use I2C / SPI communication or analog signal communication. Existing wired sensors have low data transmission rate and short data transmission distance, and existing wired sensors have many wire harnesses and complex wiring. Summary of the invention

[0003] The purpose of the present invention is to solve at least one aspect of the above-mentioned problems and defects in the prior art.

[0004] According to one aspect of the present invention, a sensor is provided. The sensor includes: a sensor element, a signal processing module, a signal transceiver module and a data line power supply module. The sensor element is used to detect the physical quantity of the detected object and convert the detected physical quantity into an electrical signal. The signal processing module is connected to the sensor element, is used to process the received electrical signal and has a first communication interface for outputting the processed electrical signal. The signal transceiver module has a second communication interface and a single-pair Ethernet interface, and the second communication interface is connected to the first communication interface of the signal processing module for receiving the processed electrical signal. The single-pair Ethernet interface is used to connect to a single-pair Ethernet device to transmit the processed electrical signal through a single-pair Ethernet. The data line power supply module is used to connect to the data line of the single-pair Ethernet to supply power to the signal processing module and the signal transceiver module through the data line of the single-pair Ethernet.

[0005] According to an exemplary embodiment of the present invention, the signal processing module includes a micro control unit or an integrated circuit unit for calibrating, compensating and amplifying the received electrical signal.

[0006] According to another exemplary embodiment of the present invention, the first communication interface of the signal processing module includes a first serial communication interface and / or a first analog communication interface, and the second communication interface of the signal transceiver module includes a second serial communication interface and / or a second analog communication interface; the second serial communication interface is used to connect to the first serial communication interface, and the second analog communication interface is used to connect to the first analog communication interface.

[0007] According to another exemplary embodiment of the present invention, the first serial communication interface and the second serial communication interface include at least one of an SPI communication interface, an I2C communication interface, and a CAN communication interface.

[0008] According to another exemplary embodiment of the present invention, the first analog communication interface and the second analog communication interface include at least one of an analog voltage communication interface and an analog current communication interface.

[0009] According to another exemplary embodiment of the present invention, the signal transceiver module includes: a micro control unit module, having a third communication interface and the second communication interface and used for performing data conversion between the second communication interface and the third communication interface; and a single-pair Ethernet module, having a fourth communication interface and the single-pair Ethernet interface and used for performing data conversion between the fourth communication interface and the single-pair Ethernet interface, the third communication interface of the micro control unit module is connected to the fourth communication interface of the single-pair Ethernet module.

[0010] According to another exemplary embodiment of the present invention, the third communication interface and the fourth communication interface include at least one of a MII interface, a RMII interface and a SPI interface.

[0011] According to another exemplary embodiment of the present invention, the sensor is a pressure sensor, a force sensor, a temperature sensor or a vibration sensor; the sensor element is used to detect the pressure, force, temperature or vibration of the detected object and convert the detected pressure, force, temperature or vibration into a corresponding electrical signal.

[0012] According to another exemplary embodiment of the present invention, the data line power supply module includes: an EMC protection circuit, whose input end is used to be connected to the single-pair Ethernet data line; a power coupling circuit, whose input end is connected to the output end of the EMC protection circuit, and whose output end is connected to the DC power supply interface of the signal processing module and the signal transceiver module; and an AC coupling circuit, whose input end is connected to the output end of the EMC protection circuit, and whose output end is connected to the physical layer interface of the signal processing module and the signal transceiver module.

[0013] According to another aspect of the present invention, a data line power supply module is provided. The data line power supply module includes: an EMC protection circuit, whose input end is used to connect to a single-pair Ethernet data line; a power coupling circuit, whose input end is connected to the output end of the EMC protection circuit, and whose output end is used to connect to the DC power supply interface of each functional module of the sensor; an AC coupling circuit, whose input end is connected to the output end of the EMC protection circuit, and whose output end is used to connect to the signal processing module and the physical layer interface of the signal transceiver module.

[0014] According to another exemplary embodiment of the present invention, the data line power supply module also includes: a node identification circuit, whose input end is connected to the output end of the EMC protection circuit; an anti-surge circuit, whose input end is connected to the output end of the AC coupling circuit; and a common-mode filtering circuit, whose input end is connected to the output end of the anti-surge circuit, and whose output end is used to connect to the physical layer interface of each functional module of the sensor.

[0015] According to another exemplary embodiment of the present invention, the EMC protection circuit includes a surge protection circuit, which includes: a bidirectional stable diode TVS1, both ends of which are respectively connected to the single pair of Ethernet data lines; a capacitor C50, one end of which is connected to one end of the bidirectional stable diode TVS1, and the other end is connected to the ground; and a capacitor C51, one end of which is connected to the other end of the bidirectional stable diode TVS1, and the other end is connected to the ground.

[0016] According to another exemplary embodiment of the present invention, the EMC protection circuit also includes an electrostatic release protection circuit, which includes: a varistor MOV1, one end of which is connected to one end of the capacitor C51 and the other end of the bidirectional stable diode TVS1, and the other end is grounded; and a varistor MOV2, one end of which is connected to one end of the capacitor C50 and one end of the bidirectional stable diode TVS1, and the other end is grounded.

[0017] According to another exemplary embodiment of the present invention, the power coupling circuit includes: a coupling inductor L2, one end of its two coils are respectively connected to the two output ends of the EMC protection circuit, and the other end of one of its two coils is grounded; and a unidirectional diode D3, the anode of which is connected to the other end of the other coil of the coupling inductor L2, and the cathode of which is used to be connected to the DC power interface of each functional module of the sensor.

[0018] According to another exemplary embodiment of the present invention, the power coupling circuit further includes a resistor R21, and the resistor R21 is connected in series between the cathode of the unidirectional diode D3 and the DC power interface of the functional module of the sensor.

[0019] According to another exemplary embodiment of the present invention, the AC coupling circuit includes: a capacitor C17, one end of which is connected to an output end of the EMC protection circuit; a capacitor C18, one end of which is connected to the other output end of the EMC protection circuit; a resistor R13, one end of which is connected to one end of the capacitor C17 and one output end of the EMC protection circuit, and the other end of which is grounded; and a resistor R14, one end of which is connected to one end of the capacitor C18 and the other output end of the EMC protection circuit, and the other end of which is grounded.

[0020] According to another exemplary embodiment of the present invention, the node identification circuit includes: a resistor R15, one end of which is connected to an output end of the EMC protection circuit; a resistor R16, one end of which is connected to another output end of the EMC protection circuit; a capacitor C19, one end of which is connected to the other end of the resistor R15 and the other end is grounded; and a capacitor C20, one end of which is connected to the other end of the resistor R16 and the other end is grounded.

[0021] According to another exemplary embodiment of the present invention, the surge protection circuit includes: a resistor R18, one end of which is connected to the other end of the capacitor C17; and a resistor R17, one end of which is connected to the other end of the capacitor C18.

[0022] According to another exemplary embodiment of the present invention, the common-mode filtering circuit includes: a coupled inductor L1, one end of its two coils is respectively connected to the other end of the resistor R18 and the resistor R17; a resistor R11, both ends of which are respectively connected to both ends of one coil of the coupled inductor L1; and a resistor R12, both ends of which are respectively connected to both ends of the other coil of the coupled inductor L1, and the other ends of the two coils of the coupled inductor L1 are used to be connected to the physical layer interfaces of the functional modules of the sensor.

[0023] According to another exemplary embodiment of the present invention, the data line power supply module further includes: a single-pair Ethernet connector, connected to the input end of the EMC protection circuit and suitable for mating with a mating connector of the single-pair Ethernet end, for electrically connecting the input end of the EMC protection circuit to the single-pair Ethernet data line.

[0024] According to another aspect of the present invention, a sensor is provided. The sensor includes: a sensor element, a signal processing module, a signal transceiver module and the aforementioned data line power supply module. The sensor element is used to detect the physical quantity of the detected object and convert the detected physical quantity into an electrical signal. The signal processing module is connected to the sensor element, is used to process the received electrical signal and has a first communication interface for outputting the processed electrical signal. The signal transceiver module has a second communication interface and a single-pair Ethernet interface, and the second communication interface is connected to the first communication interface of the signal processing module for receiving the processed electrical signal. The single-pair Ethernet interface is used to connect to a single-pair Ethernet device to transmit the processed electrical signal through a single-pair Ethernet. The data line power supply module is used to connect to the data line of the single-pair Ethernet to supply power to the signal processing module and the signal transceiver module through the data line of the single-pair Ethernet.

[0025] In the aforementioned exemplary embodiments according to the present invention, the sensor can be connected to a single-pair Ethernet, which greatly improves the data transmission rate and data transmission distance, and can be powered by the single-pair Ethernet data line. Therefore, the present invention simplifies the structure of the sensor and reduces the cost.

[0026] Other objects and advantages of the present invention will become apparent from the following description of the present invention with reference to the accompanying drawings, which will help to provide a comprehensive understanding of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A functional module diagram of a sensor according to an exemplary embodiment of the present invention is shown;

[0028] Figure 2 A circuit diagram showing a data line power supply module of a sensor according to an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further specifically described below by examples and in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the overall inventive concept of the present invention and should not be construed as a limitation of the present invention.

[0030] In addition, in the detailed description below, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the disclosed embodiments. However, it is apparent that one or more embodiments may be implemented without these specific details. In other cases, known structures and devices are embodied in a schematic manner to simplify the accompanying drawings.

[0031] According to an overall technical concept of the present invention, a sensor is provided. The sensor includes: a sensor element, a signal processing module, a signal transceiver module and a data line power supply module. The sensor element is used to detect the physical quantity of the detected object and convert the detected physical quantity into an electrical signal. The signal processing module is connected to the sensor element, used to process the received electrical signal and has a first communication interface for outputting the processed electrical signal. The signal transceiver module has a second communication interface and a single-pair Ethernet interface, and the second communication interface is connected to the first communication interface of the signal processing module for receiving the processed electrical signal. The single-pair Ethernet interface is used to connect to a single-pair Ethernet device to transmit the processed electrical signal through a single-pair Ethernet. The data line power supply module is used to connect to the data line of the single-pair Ethernet to supply power to the signal processing module and the signal transceiver module through the data line of the single-pair Ethernet.

[0032] According to another general technical concept of the present invention, a data line power supply module is provided. The data line power supply module includes: an EMC protection circuit, whose input end is used to connect to a single-pair Ethernet data line; a power coupling circuit, whose input end is connected to the output end of the EMC protection circuit, and whose output end is used to connect to the DC power supply interface of each functional module of the sensor; an AC coupling circuit, whose input end is connected to the output end of the EMC protection circuit, and whose output end is used to connect to the physical layer interface of the signal processing module and the signal transceiver module.

[0033] According to another general technical concept of the present invention, a sensor is provided. The sensor includes: a sensor element, a signal processing module, a signal transceiver module and the aforementioned data line power supply module. The sensor element is used to detect the physical quantity of the detected object and convert the detected physical quantity into an electrical signal. The signal processing module is connected to the sensor element, is used to process the received electrical signal and has a first communication interface for outputting the processed electrical signal. The signal transceiver module has a second communication interface and a single-pair Ethernet interface, and the second communication interface is connected to the first communication interface of the signal processing module for receiving the processed electrical signal. The single-pair Ethernet interface is used to connect to a single-pair Ethernet device to transmit the processed electrical signal through a single-pair Ethernet. The data line power supply module is used to connect to the data line of the single-pair Ethernet to supply power to the signal processing module and the signal transceiver module through the data line of the single-pair Ethernet.

[0034] Figure 1 A functional module diagram of a sensor according to an exemplary embodiment of the present invention is shown; Figure 2 A circuit diagram showing a data line power supply module 4 of a sensor according to an exemplary embodiment of the present invention.

[0035] like Figure 1 and Figure 2As shown, in an exemplary embodiment of the present invention, a sensor is disclosed. The sensor includes: a sensor element 1, a signal processing module 2, a signal transceiver module 3 and a data line power supply module (Power Over Datalines, PoDL) 4. The sensor element 1 is used to detect the physical quantity of the detected object and convert the detected physical quantity into an electrical signal. The signal processing module 2 is connected to the sensor element 1, and is used to process the received electrical signal and has a first communication interface 2a for outputting the processed electrical signal. The signal transceiver module 3 has a second communication interface 31a and a single pair Ethernet interface 32b. The second communication interface 31a of the signal transceiver module 3 is connected to the first communication interface 2a of the signal processing module 2, and is used to receive the processed electrical signal. The single pair Ethernet interface 32b of the signal transceiver module 3 is used to connect to a single pair Ethernet device (for example, a gateway) 5 to transmit the processed electrical signal through a single pair Ethernet (Single Pair Ethernet, SPE). The data line power supply module 4 is used to connect to two data lines of the single pair Ethernet to supply power to the signal processing module 2 and the signal transceiver module 3 through the two data lines of the single pair Ethernet.

[0036] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, the signal processing module 2 includes a micro control unit or an integrated circuit unit for calibrating, compensating and amplifying the received electrical signal.

[0037] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, the first communication interface 2a of the signal processing module 2 includes a first serial communication interface and / or a first analog communication interface, and the second communication interface 31a of the signal transceiver module 3 includes a second serial communication interface and / or a second analog communication interface. The second serial communication interface is used to connect to the first serial communication interface, and the second analog communication interface is used to connect to the first analog communication interface.

[0038] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, the first serial communication interface and the second serial communication interface include at least one of an SPI communication interface, an I2C communication interface, and a CAN communication interface.

[0039] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, the first analog communication interface and the second analog communication interface include at least one of an analog voltage communication interface and an analog current communication interface.

[0040] like Figure 1 and Figure 2As shown, in the illustrated embodiment, the signal transceiver module 3 includes: a micro control unit module 31 and a single pair Ethernet module 32. The micro control unit module 31 has a third communication interface 31b and a second communication interface 31a and is used to perform data conversion between the second communication interface 31a and the third communication interface 31b. The single pair Ethernet module 32 has a fourth communication interface 32a and a single pair Ethernet interface 32b and is used to perform data conversion between the fourth communication interface 32a and the single pair Ethernet interface 32b. The third communication interface 31b of the micro control unit module 31 is connected to the fourth communication interface 32a of the single pair Ethernet module 32.

[0041] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, the third communication interface 31b and the fourth communication interface 32a include at least one of a MII interface, a RMII interface, and a SPI interface.

[0042] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, the sensor may be a pressure sensor, a force sensor, a temperature sensor or a vibration sensor. The sensor element 1 may be used to detect the pressure, force, temperature or vibration of the detected object and may convert the detected pressure, force, temperature or vibration into a corresponding electrical signal. When the sensor is a pressure sensor, the sensor element 1 includes a Wheatstone bridge composed of a plurality of strain gauges. However, please note that the sensor of the present invention is not limited to the several types listed, and may also be other types of sensors, for example, a humidity sensor or a turbidity sensor.

[0043] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, the data line power supply module 4 includes: an EMC (Electromagnetic Compatibility) protection circuit 41, a power coupling circuit 42 and an AC coupling circuit 43. The input end of the EMC protection circuit 41 is used to connect to two data lines of a single pair of Ethernet. The input end of the power coupling circuit 42 is connected to the output end of the EMC protection circuit 41, and the output end of the power coupling circuit 42 is connected to the DC power interface of the signal processing module 2 and the signal transceiver module 3. The input end of the AC coupling circuit 43 is connected to the output end of the EMC protection circuit 41, and the output end of the AC coupling circuit 43 is connected to the physical layer interface 30 of the signal processing module 2 and the signal transceiver module 3.

[0044] like Figure 1 and Figure 2As shown, in another exemplary embodiment of the present invention, a data line power supply module 4 is also disclosed. The data line power supply module 4 includes: an EMC protection circuit 41, a power coupling circuit 42, an AC coupling circuit 43, a node identification circuit 44, an anti-surge circuit 45 and a common mode choke (CMC) circuit 46. The input end of the EMC protection circuit 41 is used to connect to two data lines of a single pair of Ethernet. The input end of the power coupling circuit 42 is connected to the output end of the EMC protection circuit 41, and the output end of the power coupling circuit 42 is used to connect to the DC power supply interface of each functional module 2, 3 of the sensor. The input end of the AC coupling circuit 43 is connected to the output end of the EMC protection circuit 41. The input end of the node identification circuit 44 is connected to the output end of the EMC protection circuit 41. The input end of the anti-surge circuit 45 is connected to the output end of the AC coupling circuit 43. The input end of the common mode filter circuit 46 is connected to the output end of the surge protection circuit 45 , and the output end of the common mode filter circuit 46 is used to be connected to the physical layer (PHY) interface 30 of each functional module 2 , 3 of the sensor.

[0045] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, the EMC protection circuit 41 includes a surge protection circuit, and the surge protection circuit includes a bidirectional stable diode TVS1, a capacitor C50 and a capacitor C51. The two ends of the bidirectional stable diode TVS1 are respectively connected to two data lines of a single pair of Ethernet. One end of the capacitor C50 is connected to one end of the bidirectional stable diode TVS1, and the other end is connected to the ground EGND. One end of the capacitor C51 is connected to the other end of the bidirectional stable diode TVS1, and the other end is connected to the ground EGND.

[0046] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, the EMC protection circuit 41 also includes an electrostatic discharge protection circuit. The electrostatic discharge protection circuit includes: a varistor MOV1 and a varistor MOV2. One end of the varistor MOV1 is connected to one end of the capacitor C51 and the other end of the bidirectional stable diode TVS1, and the other end is grounded GND. One end of the varistor MOV2 is connected to one end of the capacitor C50 and one end of the bidirectional stable diode TVS1, and the other end is grounded GND.

[0047] like Figure 1 and Figure 2As shown, in the illustrated embodiment, the power coupling circuit 42 includes: a coupling inductor L2 and a unidirectional diode D3. One end of the two coils of the coupling inductor L2 is respectively connected to the two output ends of the EMC protection circuit 41, and the other end of one of the two coils of the coupling inductor L2 is grounded GND. The positive electrode of the unidirectional diode D3 is connected to the other end of the other coil of the coupling inductor L2, and the negative electrode of the unidirectional diode D3 is used to connect to the DC power supply interface of each functional module 2, 3 of the sensor. In the illustrated embodiment, the power coupling circuit 42 can isolate AC and only allow DC to pass. The coupling inductor L2 is used to filter out differential mode interference, and the unidirectional diode D3 is used to provide reverse voltage protection.

[0048] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, the power coupling circuit 42 further includes a resistor R21, which is connected in series between the cathode of the unidirectional diode D3 and the DC power interface of the sensor functional module. The resistor R21 is used to adjust the output DC level.

[0049] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, the AC coupling circuit 43 includes: a capacitor C17, a capacitor C18, a resistor R13 and a resistor R14. One end of the capacitor C17 is connected to an output end of the EMC protection circuit 41. One end of the capacitor C18 is connected to another output end of the EMC protection circuit 41. One end of the resistor R13 is connected to one end of the capacitor C17 and one output end of the EMC protection circuit 41, and the other end thereof is grounded GND. One end of the resistor R14 is connected to one end of the capacitor C18 and another output end of the EMC protection circuit 41, and the other end thereof is grounded GND. In the illustrated embodiment, the AC coupling circuit 43 isolates the DC by the combination of the resistors R13, R14 and the capacitors C17, C18, and only allows the AC to pass.

[0050] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, the node identification circuit 44 includes: a resistor R15, a resistor R16, a capacitor C19 and a capacitor C20. One end of the resistor R15 is connected to an output end of the EMC protection circuit 41. One end of the resistor R16 is connected to another output end of the EMC protection circuit 41. One end of the capacitor C19 is connected to the other end of the resistor R15, and the other end is grounded GND. One end of the capacitor C20 is connected to the other end of the resistor R16, and the other end is grounded GND. In the illustrated embodiment, the node identification circuit 44 improves the communication signal by filtering the unstable level signal through the combination of the resistors R15, R16 and the capacitors C19, C20.

[0051] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, the surge protection circuit 45 includes: a resistor R18 and a resistor R17. One end of the resistor R18 is connected to the other end of the capacitor C17. One end of the resistor R17 is connected to the other end of the capacitor C18. In the illustrated embodiment, the resistors R18 and R17 in the surge protection circuit 45 are used to limit the surge current in the circuit.

[0052] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, the common mode filter circuit 46 includes: a coupled inductor L1, a resistor R11 and a resistor R12. One end of the two coils of the coupled inductor L1 is connected to the other end of the resistor R18 and the resistor R17 respectively. The two ends of the resistor R11 are connected to the two ends of one coil of the coupled inductor L1 respectively. The two ends of the resistor R12 are connected to the two ends of the other coil of the coupled inductor L1 respectively. The other ends of the two coils of the coupled inductor L1 are used to be connected to the physical layer interface 30 of each functional module 2, 3 of the sensor. In the illustrated embodiment, the coupled inductor L1, the resistor R11 and the resistor R12 in the common mode filter circuit 46 are used to filter the common mode electromagnetic interference signal.

[0053] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, the data line power supply module also includes a single-pair Ethernet connector 40, which is connected to the input end of the EMC protection circuit 41 and is suitable for mating with a mating connector (not shown) at the single-pair Ethernet end, and is used to electrically connect the input end of the EMC protection circuit 41 to the two data lines of the single-pair Ethernet.

[0054] like Figure 1 and Figure 2 As shown, in another exemplary embodiment of the present invention, a sensor is also disclosed. The sensor includes: a sensor element 1, a signal processing module 2, a signal transceiver module 3 and Figure 2The data line power supply module 4 shown. The sensor element 1 is used to detect the physical quantity of the detected object and convert the detected physical quantity into an electrical signal. The signal processing module 2 is connected to the sensor element 1, and is used to process the received electrical signal and has a first communication interface 2a for outputting the processed electrical signal. The signal transceiver module 3 has a second communication interface 31a and a single-pair Ethernet interface 32b. The second communication interface 31a of the signal transceiver module 3 is connected to the first communication interface 2a of the signal processing module 2, and is used to receive the processed electrical signal. The single-pair Ethernet interface 32b of the signal transceiver module 3 is used to be connected to a single-pair Ethernet device (for example, a gateway) 5 to transmit the processed electrical signal through a single-pair Ethernet (Single Pair Ethernet, SPE). The data line power supply module 4 is used to be connected to two data lines of a single-pair Ethernet to supply power to the signal processing module 2 and the signal transceiver module 3 through the two data lines of the single-pair Ethernet.

[0055] Those skilled in the art will appreciate that the embodiments described above are exemplary and may be improved upon by those skilled in the art. The structures described in the various embodiments may be freely combined without causing any conflicts in structure or principle, and these changes should fall within the scope of protection of the present invention.

[0056] Although the present invention has been described in conjunction with the accompanying drawings, the embodiments disclosed in the accompanying drawings are intended to exemplify the preferred implementations of the present invention and should not be construed as limiting the present invention.

[0057] Although some embodiments of the general inventive concept have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.

[0058] It should be noted that the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. In addition, any element reference signs in the claims shall not be construed as limiting the scope of the present invention.

Claims

1. A sensor, characterized in that: include: A sensor element (1) for detecting a physical quantity of a detected object and converting the detected physical quantity into an electrical signal; A signal processing module (2), connected to the sensor element (1), used for processing the received electrical signal and having a first communication interface (2a) for outputting the processed electrical signal; The signal transceiver module (3) comprises: A second communication interface (31a), connected to the first communication interface (2a) of the signal processing module (2), for receiving the processed electrical signal; and A single-pair Ethernet interface (32b) for connecting to a single-pair Ethernet device (5) to transmit processed electrical signals via the single-pair Ethernet; and A data line power supply module (4) is used to be connected to a single pair of Ethernet data lines so as to supply power to the signal processing module (2) and the signal transceiver module (3) through the single pair of Ethernet data lines.

2. The sensor according to claim 1, characterized in that: The signal processing module (2) comprises a micro control unit or an integrated circuit unit for calibrating, compensating and amplifying the received electrical signal.

3. The sensor according to claim 1, characterized in that: The first communication interface (2a) of the signal processing module (2) includes a first serial communication interface and / or a first analog communication interface, and the second communication interface (31a) of the signal transceiver module (3) includes a second serial communication interface and / or a second analog communication interface; The second serial communication interface is used to connect to the first serial communication interface, and the second analog communication interface is used to connect to the first analog communication interface.

4. The sensor according to claim 3, characterized in that: The first serial communication interface and the second serial communication interface include at least one of an SPI communication interface, an I2C communication interface and a CAN communication interface.

5. The sensor according to claim 3, characterized in that: The first analog communication interface and the second analog communication interface include at least one of an analog voltage communication interface and an analog current communication interface.

6. The sensor according to claim 1, characterized in that: The signal transceiver module (3) comprises: A micro control unit module (31) having a third communication interface (31b) and the second communication interface (31a) and used for performing data conversion between the second communication interface (31a) and the third communication interface (31b); and A single-pair Ethernet module (32) having a fourth communication interface (32a) and the single-pair Ethernet interface (32b) and used for performing data conversion between the fourth communication interface (32a) and the single-pair Ethernet interface (32b), The third communication interface (31b) of the micro control unit module (31) is connected to the fourth communication interface (32a) of the single-pair Ethernet module (32).

7. The sensor according to claim 6, characterized in that: The third communication interface (31b) and the fourth communication interface (32a) include at least one of an MII interface, an RMII interface and an SPI interface.

8. The sensor according to claim 1, characterized in that: The sensor is at least one of a pressure sensor, a force sensor, a temperature sensor or a vibration sensor; The sensor element (1) is used to detect at least one of the pressure, force, temperature or vibration of the detected object and convert the detected at least one of the pressure, force, temperature or vibration into a corresponding electrical signal.

9. The sensor according to any one of claims 1 to 8, characterized in that: The data line power supply module (4) comprises: An EMC protection circuit (41), whose input end is used to be connected to the single-pair Ethernet data line; a power coupling circuit (42), whose input end is connected to the output end of the EMC protection circuit (41), and whose output end is connected to the DC power supply interface of the signal processing module (2) and the signal transceiver module (3); and An AC coupling circuit (43) has an input end connected to the output end of the EMC protection circuit (41), and an output end connected to the signal processing module (2) and the physical layer interface (30) of the signal transceiver module (3).

10. A data line power supply module (4), characterized in that: include: An EMC protection circuit (41) having an input end for connecting to a single-pair Ethernet data line; A power coupling circuit (42), whose input end is connected to the output end of the EMC protection circuit (41), and whose output end is used to be connected to the DC power supply interface of each functional module (2, 3) of the sensor; and An AC coupling circuit (43) has an input end connected to the output end of the EMC protection circuit (41), and an output end used to connect to the signal processing module (2) and the physical layer interface (30) of the signal transceiver module (3).

11. The data line power supply module according to claim 10, characterized in that: Also includes: A node identification circuit (44), an input end of which is connected to an output end of the EMC protection circuit (41); An anti-surge circuit (45), an input end of which is connected to the output end of the AC coupling circuit (43); and A common mode filter circuit (46) has an input end connected to the output end of the surge protection circuit (45), and an output end used to connect to the physical layer interface (30) of each functional module (2, 3) of the sensor.

12. The data line power supply module according to claim 11, characterized in that: The EMC protection circuit (41) comprises: Surge protection circuit, including: A bidirectional stable diode TVS1, two ends of which are respectively connected to the single pair of Ethernet data lines; A capacitor C50, one end of which is connected to one end of the bidirectional stable diode TVS1, and the other end of which is connected to the ground; and The capacitor C51 has one end connected to the other end of the bidirectional stable diode TVS1 and the other end connected to the ground.

13. The data line power supply module according to claim 12, characterized in that: The EMC protection circuit (41) further comprises: Electrostatic discharge protection circuit, including: A varistor MOV1, one end of which is connected to one end of the capacitor C51 and the other end of the bidirectional stable diode TVS1, and the other end of which is grounded; and The varistor MOV2 has one end connected to one end of the capacitor C50 and one end of the bidirectional stable diode TVS1, and the other end is grounded.

14. The data line power supply module according to claim 11, characterized in that: The power coupling circuit (42) comprises: A coupling inductor L2, one end of the two coils of which are respectively connected to the two output ends of the EMC protection circuit (41), and the other end of one of the two coils is grounded; and A unidirectional diode D3, whose anode is connected to the other end of the other coil of the coupling inductor L2, and whose cathode is used to be connected to the DC power supply interface of each functional module (2, 3) of the sensor.

15. The data line power supply module according to claim 14, characterized in that: The power coupling circuit (42) further includes: The resistor R21 is used to be connected in series between the cathode of the unidirectional diode D3 and the DC power supply interface of the functional module of the sensor.

16. The data line power supply module according to claim 11, characterized in that: The AC coupling circuit (43) comprises: A capacitor C17, one end of which is connected to an output end of the EMC protection circuit (41); A capacitor C18, one end of which is connected to the other output end of the EMC protection circuit (41); a resistor R13, one end of which is connected to one end of the capacitor C17 and an output end of the EMC protection circuit (41), and the other end of which is grounded; and The resistor R14 has one end connected to one end of the capacitor C18 and the other output end of the EMC protection circuit (41), and the other end connected to the ground.

17. The data line power supply module according to claim 11, characterized in that: The node identification circuit (44) comprises: A resistor R15, one end of which is connected to an output end of the EMC protection circuit (41); A resistor R16, one end of which is connected to the other output end of the EMC protection circuit (41); A capacitor C19, one end of which is connected to the other end of the resistor R15, and the other end of which is grounded; and The capacitor C20 has one end connected to the other end of the resistor R16 and the other end grounded.

18. The data line power supply module according to claim 16, characterized in that: The surge protection circuit (45) comprises: a resistor R18, one end of which is connected to the other end of the capacitor C17; and One end of the resistor R17 is connected to the other end of the capacitor C18.

19. The data line power supply module according to claim 18, characterized in that: The common mode filtering circuit (46) comprises: A coupled inductor L1, one end of the two coils of which are connected to the other end of the resistor R18 and the other end of the resistor R17 respectively; a resistor R11, both ends of which are respectively connected to both ends of a coil of the coupling inductor L1; and The resistor R12 has two ends connected to the other two ends of the other coil of the coupling inductor L1. The other ends of the two coils of the coupling inductor L1 are used to be connected to the physical layer interfaces (30) of the functional modules (2, 3) of the sensor.

20. The data line power supply module according to claim 11, characterized in that: Also includes: A single-pair Ethernet connector (40) is connected to the input end of the EMC protection circuit (41) and is suitable for mating with a matching connector at the single-pair Ethernet end, and is used to electrically connect the input end of the EMC protection circuit (41) to the data line of the single-pair Ethernet.

21. A sensor, characterized in that: include: A sensor element (1) for detecting a physical quantity of a detected object and converting the detected physical quantity into an electrical signal; and A signal processing module (2), connected to the sensor element (1), used for processing the received electrical signal and having a first communication interface (2a) for outputting the processed electrical signal; The signal transceiver module (3) comprises: A second communication interface (31a), connected to the first communication interface (2a) of the signal processing module (2), for receiving the processed electrical signal; and A single-pair Ethernet interface (32b) for connecting to a single-pair Ethernet device (5) to transmit processed electrical signals via the single-pair Ethernet; and A data line power supply module (4) is used to be connected to a single pair of Ethernet data lines so as to supply power to the signal processing module (2) and the signal transceiver module (3) through the single pair of Ethernet data lines. The data line power supply module (4) is the data line power supply module according to any one of claims 10 to 20.

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