LIN photoelectric transceiver based on optical power supply

Abstract

The utility model discloses an LIN photoelectric transceiver based on optical power supply, which comprises a transmitting end and a receiving end, the transmitting end comprises a constant current source module, a first energy supply module and an LIN signal transmitting module, and the constant current source module is electrically connected with the first energy supply module; the receiving end comprises a second energy supply module and an LIN signal receiving module; the first energy supply module and the second energy supply module are connected through a first optical fiber; the LIN signal transmitting module comprises an analog interface DSUB2 and an LIN signal transmitting unit which are electrically connected, the LIN signal receiving module comprises an analog interface DSUB4 and an LIN signal receiving unit which are electrically connected, and the LIN signal transmitting unit and the LIN signal receiving unit are connected through a second optical fiber. According to the utility model, the independent transmission of energy supply and signals can be realized, the transmission distance is increased, and the anti-electromagnetic interference is enhanced, thereby improving the transmission quality.

Description

Technical Field

[0001] The utility model belongs to the technical field of photoelectric conversion, and in particular relates to a LIN photoelectric transceiver device based on optical power supply. Background Art

[0002] Transmission distance and anti-electromagnetic interference degree are important factors affecting the quality of communication transmission. The use of CAN / CANFD / LIN photoelectric transceivers can increase the transmission distance and enhance the anti-electromagnetic interference, thereby improving the transmission quality. The photoelectric transceivers in the prior art are powered by external DC power supply or internal lithium battery.

[0003] For example, the publication number is "JPH0376167A", and the patent name is "Photoelectric converter, optical transceiver using photoelectric converter, optical transmitter and optical communication device". The photoelectric transceiver in this solution uses external DC power supply, which will cause EMC radiation problems. For example, the publication number is "CN107284557A", and the patent name is "A portable anti-theft device integrating energy storage and energy conversion control". The photoelectric transceiver in this solution is powered by batteries, and battery power supply requires frequent charging of the device, which wastes time, and frequent plugging and unplugging of communication optical fibers can easily damage the connectors. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide a LIN optoelectronic transceiver based on optical power supply, aiming to solve the problem in the prior art that external DC power supply may cause EMC radiation, and the internal lithium battery power supply requires frequent charging of the device, which wastes time, and the frequent plugging and unplugging of communication optical fibers may also easily damage the connectors.

[0005] The utility model is implemented by the following technical solutions:

[0006] A LIN optoelectronic transceiver based on optical power supply, comprising a transmitting end and a receiving end, wherein the transmitting end comprises a constant current source module, a first energy supply module and a LIN signal transmitting module, and the constant current source module is electrically connected to the first energy supply module; the receiving end comprises a second energy supply module and a LIN signal receiving module; the first energy supply module and the second energy supply module are connected via a first optical fiber; the LIN signal transmitting module comprises an electrically connected analog interface DSUB2 and a LIN signal transmitting unit, the LIN signal receiving module comprises an electrically connected analog interface DSUB4 and a LIN signal receiving unit, and the LIN signal transmitting unit and the LIN signal receiving unit are connected via a second optical fiber.

[0007] To optimize the above technical solutions, the specific measures taken also include:

[0008] Furthermore, the constant current source module includes a constant voltage circuit, a sampling resistor R4, an operational amplifier circuit and a regulating circuit which are electrically connected in sequence;

[0009] The constant voltage circuit includes a constant voltage chip U1, a resistor R3, an LED1, an LED2, an LED3, a resistor R2, a capacitor C2, a resistor R8, a resistor R9, a resistor R10, and a resistor R5. Pin 1 of the constant voltage chip U1 is connected to LED3 and capacitor C2, pin 2 of the constant voltage chip U1 is connected to the sliding end of the sliding resistor R2, capacitor C2, and resistor R8, pin 3 of the constant voltage chip U1 is connected to pin 6 of the constant voltage chip U1, pin 4 of the constant voltage chip U1 is grounded, pin 5 of the constant voltage chip U1 is connected to resistors R8 and R9, pin 7 of the constant voltage chip U1 is connected to LED1 and LED2, pin 8 of the constant voltage chip U1 is connected to resistor R3, resistors R9 and R10 are both grounded, resistor R10 is connected to LED2, a fixed end on one side of the sliding resistor R2 is connected to resistor R5, and a fixed end on the other side of the sliding resistor R2 is grounded;

[0010] The operational amplifier circuit includes a dual operational amplifier U3, a resistor R7, a capacitor C3, a capacitor C4, a capacitor C5, an inductor L1, a unidirectional diode D1, a capacitor C6, a capacitor C7, and a resistor R11. Pin 1 of the dual operational amplifier U3 is grounded, pin 2 of the dual operational amplifier U3 is connected to a fixed end on one side of a sampling resistor R4, both ends of the resistor R7 are respectively connected to pin 1 and pin 2 of the dual operational amplifier U3, pin 4 of the dual operational amplifier U3 is connected to capacitor C3, and pin 5 of the dual operational amplifier U3 is connected to capacitor C3, capacitor C4, and resistor R11. The capacitor C5 is connected in series, the 3rd pin of the dual operational amplifier U3 is connected in parallel with the 6th pin of the dual operational amplifier U3, the unidirectional diode D1 is connected in series with the 3rd pin and the 6th pin of the dual operational amplifier U3, the inductor L1 is connected in series with the 3rd pin and the 6th pin of the dual operational amplifier U3, one end of the capacitor C6 is connected to the fixed end of the sampling resistor R4, the other end of the capacitor C6 is connected in series with the unidirectional diode D1, the capacitor C7 and the resistor R11, the capacitor C6, the unidirectional diode D1, the capacitor C7 and the resistor R11 are grounded, and the resistor R11 is connected to the 6th pin of the constant voltage chip U1;

[0011] The regulating circuit includes a regulating chip U2, a resistor R1, a resistor R6, a capacitor C1, and a capacitor C5. Pin 1 of the regulating chip U2 is connected in series with the resistor R1 and the resistor R6. Pin 2 of the regulating chip U2 is connected in series with the capacitor C1 and the resistor R6. Pin 3 of the regulating chip U2 is connected with the capacitor C5, the capacitor C4, the capacitor C3, and the pin 5 of the dual operational amplifier U3. The capacitor C5 is grounded.

[0012] Furthermore, the LIN signal transmitting unit includes an electrostatic and overvoltage protection circuit 1, a common mode interference suppression circuit 1, a π-type filter circuit 1, a capacitor selection switch circuit 1, an inverter circuit 1, a photoelectric coupling circuit 1, a signal laser transmitting circuit 1, and a signal amplifying circuit 1, which are electrically connected in sequence; the signal amplifying circuit 1 is arranged between the signal laser transmitting circuit 1 and the inverter circuit 1, and the electrostatic and overvoltage protection circuit 1 is connected to the analog interface DSUB2.

[0013] Furthermore, the electrostatic and overvoltage protection circuit 1 includes a gas discharge tube GDT3 and an ESD device D6, and the 7th pin of the analog interface DSUB2 is respectively connected to the 1st pin of the gas discharge tube GDT3 and the 1st pin of the ESD device D6, and the 2nd pin of the gas discharge tube GDT3 and the 2nd pin of the ESD device D6 are both connected to the signal ground;

[0014] The common mode interference suppression circuit 1 comprises a magnetic bead L7 and a magnetic bead L6 connected in series, the magnetic bead L7 is connected to pin 3 of the analog interface DSUB2, and the magnetic bead L6 is grounded;

[0015] The π-type filter circuit 1 includes a capacitor C30, a capacitor C29, and an inductor L5, wherein the capacitor C29 is connected to one end of the inductor L5 and the ESD device D6, and the capacitor C30 is connected to the other end of the inductor L5, and the capacitor C30 and the capacitor C29 are grounded;

[0016] The capacitor selection switch circuit 1 includes a capacitor selection switch SW1, a capacitor C21, a capacitor C22, a resistor R44, a unidirectional diode D5, and a unidirectional diode D4. Pins 1, 2, and 3 of the capacitor selection switch SW1 are all connected to the inductor L5. Pin 5 of the capacitor selection switch SW1 is connected to the capacitor C21. Pin 6 of the capacitor selection switch SW1 is connected to the capacitor C22. The capacitors C21 and C22 are both grounded. Pin 7 of the capacitor selection switch SW1 is connected to the resistor R44. The resistor R44 is connected in series with the unidirectional diode D5. The unidirectional diode D5 is connected in series with the unidirectional diode D4.

[0017] The signal conversion circuit 1 includes a LIN transceiver chip U12, a capacitor C25, a capacitor C27, a capacitor C26, a resistor R46, a resistor R50, and a resistor R52. One end of the capacitor C21 and the capacitor C27 are connected in series with D5, and the other ends of the capacitor C21 and the capacitor C27 are grounded. Pin 1 of the LIN transceiver chip U12 is connected in series with the resistor R46 and the resistor R50, respectively. Pin 2 of the LIN transceiver chip U12 is connected in series with the resistor R52, and pin 7 of the LIN transceiver chip U12 is connected in series with the capacitor C27 and the capacitor C25, respectively. Pin 6 of the LIN transceiver chip U12 is connected in series with pin 1, pin 2, and pin 3 of the capacitor selection switch SW1, respectively. Pin 5 of the LIN transceiver chip U12 is grounded, and the capacitor C26 is connected to the resistor R46.

[0018] The inverter circuit 1 includes an inverter U11 and a capacitor C24, wherein the 14th pin of the inverter U11 is connected to the capacitor C24 and the supply voltage, the 7th pin of the inverter U11 is grounded, the 9th pin of the inverter U11 is connected to the resistor R50, the capacitor C24 is grounded, the 2nd pin and the 3rd pin of the inverter U11 are connected, the 4th pin and the 5th pin of the inverter U11 are connected, and the 6th pin and the 13th pin of the inverter U11 are connected;

[0019] The photoelectric coupling circuit 1 includes a photoelectric coupler U9, a resistor R41, a resistor R42, a resistor R43, and a capacitor C19, wherein the pin 2 of the photoelectric coupler U9 is connected to the pin 8 of the inverter U11, the pin 3 of the photoelectric coupler U9 is connected to the pin 2 of the photoelectric coupler U9, the pin 3 of the photoelectric coupler U9 is connected to the resistor R41, the resistor R41 is grounded, the pin 5 of the photoelectric coupler U9 is grounded, the pin 6 of the photoelectric coupler U9 is connected to the resistor R42, the pin 6 of the photoelectric coupler U9 is connected to the pin 7 of the photoelectric coupler U9, the pin 7 of the photoelectric coupler U9 is connected to the pin 12 of the inverter U11, the pin 8 of the photoelectric coupler U9 is respectively connected to the capacitor C19 and the power supply voltage, the capacitor C19 is grounded, and the resistor R43 is respectively connected to the pin 6 and pin 8 of the photoelectric coupler U9;

[0020] The signal laser transmitting circuit 1 includes a signal laser U10, a capacitor C20 and a capacitor C23, wherein the pins 1 and 9 of the signal laser U10 are grounded, the pin 8 of the signal laser U10 is connected to the resistor R42, the pin 6 of the signal laser U10 is respectively connected to the capacitor C20 and the power supply voltage, the pin 5 of the signal laser U10 is respectively connected to the capacitor C23 and the power supply voltage, and the capacitor C20 and the capacitor C23 are both grounded;

[0021] The signal amplifying circuit 1 includes a resistor R45, a capacitor C28, a transistor Q8, a transistor Q9, a resistor R48, a resistor R47 and a resistor R49. One end of the resistor R48 is connected to pin 2 of the signal laser U10, and the other end of the resistor R48 is connected in series with the capacitor C28 and the base of the transistor Q8 respectively. The collector of the transistor Q8 is connected in series with pin 5 of the signal laser U10, the capacitor C23 and the collector of the transistor Q9. The emitter of the transistor Q8 is connected to the resistor R51 and the resistor R47 respectively. The resistor R51 is grounded. The resistor R47 is connected to the base of the transistor Q9. The emitter of the transistor Q9 is connected to the resistor R49 and pin 1 of the inverter U11 respectively. The resistor R49 is grounded.

[0022] Furthermore, the LIN signal transmitting module also includes a boost circuit, which includes a boost chip U8, a resistor R36, a resistor R37, a capacitor C17, an inductor L4, a unidirectional diode D3, a capacitor C18, a resistor R38, a resistor R39, a resistor R40, a capacitor C15, and a capacitor C16. Pin 1 of the boost chip U8 is connected to the unidirectional diode D3 and the inductor L4, pin 2 of the boost chip U8 is grounded, and pin 3 of the boost chip U8 is connected to resistors R40 and R39. Pin 4 of the boost chip U8 is connected to resistor R37, pin 5 of the boost chip U8 is connected to resistor R36, resistor R37, and inductor L4, the unidirectional diode D3 is connected to capacitor C18, resistor R38, capacitor C15, and capacitor C16, capacitor C18 is connected to capacitor R39, the resistor R38 is connected to resistor R39, the capacitor C15 and capacitor C16 are grounded, the resistor R40 is grounded, the capacitor C17 is grounded, and pin 1 of the boost chip U8 is connected to pin 7 of chip U12.

[0023] Further, the LIN signal transmitting module also includes a transceiver indicator light circuit, which includes a resistor R29, a resistor R32, a transistor Q5 and a transistor Q7, a resistor R30, a resistor R24, a resistor R25, a transistor Q3, a transistor Q4, a transistor Q6, a resistor R33, a resistor R34, a resistor R35, a resistor R26, a resistor R27, a resistor R28, a resistor R23, a resistor R24, an LED4, and an LED5;

[0024] The resistor R29 is connected to pin 8 of the signal laser U5, the resistor R32 is connected to pin 2 of the signal laser U5, the base of the transistor Q5 is connected to the resistor R29, the collector of the transistor Q5 is connected to the resistor R30 and the base of the transistor Q4, the emitter of the transistor Q5 is connected to the emitters of the transistors Q3, Q4 and Q6, the base of the transistor Q7 is connected to the resistor R32, the collector of the transistor Q7 is connected to the resistor R31 and the base of the transistor Q6, the emitter of the transistor Q7 is connected to the emitters of the transistors Q3, Q4 and Q6, and the resistor R30 is connected in series with the resistor R31 The power supply voltage is connected in parallel, the resistor R25 is connected to the base of the transistor Q3, the collector of the transistor Q3 is connected to the resistor R23, the resistor R25 is connected to the resistor R24, the resistor R24 ​​is connected to LED4, the resistor R23 is connected to pin 1 of LED4, the collector of the transistor Q4 is respectively connected in series with the resistor R26, the resistor R27, and the resistor R28, the resistor R26, the resistor R27, and the resistor R28 are all connected in series with pin 1 of LED5, the collector of the transistor Q6 is respectively connected in series with the resistor R33, the resistor R34, and the resistor R35, the resistor R33, the resistor R34, and the resistor R35 are all connected in series with pin 2 of LED5.

[0025] Further, the LIN signal receiving module is electrically connected to the analog interface DSUB4 and the LIN signal receiving unit;

[0026] The LIN signal receiving unit includes an electrostatic and overvoltage protection circuit 2, a common mode interference suppression circuit 2, a π-type filter circuit 2, a capacitor selection switch circuit 2, an inverter circuit 2, a photoelectric coupling circuit 2, a signal laser transmitting circuit 2, and a signal amplifying circuit 2, which are electrically connected in sequence; the signal amplifying circuit 2 is arranged between the signal laser transmitting circuit 2 and the inverter circuit 2, and the electrostatic and overvoltage protection circuit 2 is connected to the analog interface DSUB4.

[0027] Furthermore, the second electrostatic and overvoltage protection circuit includes a gas discharge tube GDT6 and an ESD device D6, and the pin 7 of the analog interface DSUB4 is respectively connected to the pin 1 of the gas discharge tube GDT6 and the pin 1 of the ESD device D10, and the pin 2 of the gas discharge tube GDT6 and the pin 2 of the ESD device D10 are both connected to the signal ground;

[0028] The second common mode interference suppression circuit comprises a magnetic bead L12 and a magnetic bead L11 connected in series, the magnetic bead L12 is connected to pin 3 of the analog interface DSUB2, and the magnetic bead L11 is grounded;

[0029] The second π-type filter circuit includes a capacitor C49, a capacitor C48, and an inductor L10. The capacitor C48 is connected to one end of the inductor L10 and the ESD device D6. The capacitor C49 is connected to the other end of the inductor L10. The capacitor C49 and the capacitor C48 are grounded.

[0030] The capacitor selection switch circuit 2 includes a capacitor selection switch SW2, a capacitor C41, a capacitor C42, a resistor R67, a unidirectional diode D9, and a unidirectional diode D4. Pins 1, 2, and 3 of the capacitor selection switch SW2 are all connected to the inductor L10. Pin 5 of the capacitor selection switch SW2 is connected to the capacitor C41. Pin 6 of the capacitor selection switch SW2 is connected to the capacitor C42. The capacitor C41 and the capacitor C42 are both grounded. Pin 7 of the capacitor selection switch SW2 is connected to the resistor R67. The resistor R67 is connected in series with the unidirectional diode D9. The unidirectional diode D9 is connected in series with the unidirectional diode D4.

[0031] The signal conversion circuit 2 includes a LIN transceiver chip U20, a capacitor C44, a capacitor C46, ​​a capacitor C45, a resistor R69, a resistor R72, and a resistor R75. One end of the capacitor C41 and the capacitor C46 are connected in series with D9, and the other ends of the capacitor C41 and the capacitor C46 are grounded. Pin 1 of the LIN transceiver chip U20 is connected in series with the resistor R69 and the resistor R72, respectively. Pin 2 of the LIN transceiver chip U20 is connected in series with the resistor R75, and pin 7 of the LIN transceiver chip U20 is connected in series with the capacitor C46 and the capacitor C44, respectively. Pin 6 of the LIN transceiver chip U20 is connected in series with pin 1, pin 2, and pin 3 of the capacitor selection switch SW2, respectively. Pin 5 of the LIN transceiver chip U20 is grounded, and the capacitor C45 is connected to the resistor R69.

[0032] The second inverter circuit includes an inverter U19 and a capacitor C43, wherein the 14th pin of the inverter U19 is connected to the capacitor C43 and the supply voltage, the 7th pin of the inverter U19 is grounded, the 9th pin of the inverter U19 is connected to the resistor R72, the capacitor C43 is grounded, the 2nd pin and the 3rd pin of the inverter U19 are connected, the 4th pin and the 5th pin of the inverter U19 are connected, and the 6th pin and the 13th pin of the inverter U19 are connected;

[0033] The photoelectric coupling circuit 2 includes a photoelectric coupler U17, a resistor R64, a resistor R65, a resistor R66, and a capacitor C38. Pin 2 of the photoelectric coupler U17 is connected to pin 8 of the inverter U19, pin 3 of the photoelectric coupler U17 is connected to pin 2 of the photoelectric coupler U17, pin 3 of the photoelectric coupler U17 is connected to resistor R64, the resistor R64 is grounded, pin 5 of the photoelectric coupler U17 is grounded, pin 6 of the photoelectric coupler U17 is connected to resistor R65, pin 6 of the photoelectric coupler U17 is connected to pin 7 of the photoelectric coupler U17, pin 7 of the photoelectric coupler U17 is connected to pin 12 of the inverter U19, pin 8 of the photoelectric coupler U17 is respectively connected to capacitor C38 and a power supply voltage, the capacitor C38 is grounded, and the resistor R66 is respectively connected to pin 6 and pin 8 of the photoelectric coupler U17;

[0034] The signal laser transmitting circuit 2 includes a signal laser U18, a capacitor C39 and a capacitor C40, the pins 1 and 9 of the signal laser U18 are grounded, the pin 8 of the signal laser U18 is connected to the resistor R65, the pin 6 of the signal laser U18 is respectively connected to the capacitor C39 and the power supply voltage, the pin 5 of the signal laser U18 is respectively connected to the capacitor C40 and the power supply voltage, and the capacitor C39 and the capacitor C40 are both grounded;

[0035] The signal amplification circuit 2 includes a resistor R68, a capacitor C47, a transistor Q12, a transistor Q13, a resistor R74, a resistor R70 and a resistor R71. One end of the resistor R74 is connected to pin 2 of the signal laser U18, and the other end of the resistor R74 is connected in series with the capacitor C47 and the base of the transistor Q12 respectively. The collector of the transistor Q12 is connected in series with pin 5 of the signal laser U18, the capacitor C40 and the collector of the transistor Q13. The emitter of the transistor Q12 is connected to the resistor R73 and the resistor R70 respectively. The resistor R73 is grounded. The resistor R70 is connected to the base of the transistor Q13. The emitter of the transistor Q13 is connected to the resistor R71 and pin 1 of the inverter U19 respectively. The resistor R71 is grounded.

[0036] Furthermore, the beneficial effects of the utility model are:

[0037] Compared with the prior art, the LIN optoelectronic transceiver device based on optical power supply of the utility model can realize independent transmission of energy supply and signal, increase the transmission distance, enhance the resistance to electromagnetic interference, and thus improve the transmission quality.

[0038] The utility model adopts an improved constant current source circuit, adopts a dual operational amplifier and a constant voltage chip, combines a sampling resistor, and reasonably sets the peripheral circuit, and finally realizes an adjustable constant current module, which can provide a stable current according to actual conditions.

[0039] The utility model adopts improved signal transmitting module and signal receiving module, both of which are based on LIN chip and carry out corresponding circuit design. On the one hand, it is equipped with boost circuit to match the voltage requirement of LIN chip, and on the other hand, it can suppress common mode interference and signal noise in LIN differential signal, ensure the quality of signal, and prevent external electromagnetic interference. At the same time, with the transmitting and receiving indicator light circuit, it can intuitively display the receiving and transmitting states. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 The utility model discloses a constant current source circuit diagram of a LIN photoelectric transceiver device based on light power supply.

[0041] Figure 2 The utility model is a circuit diagram of a signal transmitting module.

[0042] Figure 3 The utility model is a circuit diagram of a transmitting and receiving indicator light.

[0043] Figure 4 The utility model is a boost circuit diagram.

[0044] Figure 5 The utility model is a circuit diagram of a signal receiving module. DETAILED DESCRIPTION

[0045] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0046] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0047] Reference Figure 1-Figure 5 This embodiment provides a LIN optoelectronic transceiver based on optical power supply, including a transmitting end and a receiving end, the transmitting end provides signals and power, and the receiving end receives signals and power.

[0048] The transmitting end includes a constant current source module, a first energy supply module and a LIN signal transmitting module, and the constant current source module is electrically connected to the first energy supply module; the receiving end includes a second energy supply module and a LIN signal receiving module; the first energy supply module and the second energy supply module are connected through a first optical fiber; the LIN signal transmitting module and the LIN signal receiving module are connected through a second optical fiber; the transmitting end is provided with a first interface and a second interface, the constant current source module and the LIN signal transmitting module are electrically connected to the first interface, and the LIN signal transmitting module is electrically connected to the second interface; the receiving end is provided with a third interface, and the LIN signal receiving module is electrically connected to the third interface.

[0049] The first optical fiber is a power supply optical fiber, the second optical fiber is a signal optical fiber, the first interface is a DC power interface, and the second interface and the third interface are both DB9 serial interfaces.

[0050] The first interface is used to receive an external DC voltage. In this embodiment, the DC voltage is preferably 12V. The DC voltage received by the first interface is sequentially input into the constant current source module and the first energy supply module, and then input into the second energy supply module through the first optical fiber to realize energy supply. At the same time, the DC voltage of the first interface is also responsible for powering the LIN signal sending module. The constant current source module is used to separate the first energy supply module and the LIN signal sending module from the first interface to avoid direct connection between the first module and the LIN signal sending module and the first interface, thereby ensuring that the first energy supply module and the LIN signal sending module obtain stable current. The first optical fiber and the second optical fiber are used for energy supply and signal transmission, respectively, which can maintain high-speed and stable transmission and reduce the delay rate.

[0051] There are bidirectional connections between the second interface and the LIN signal transmitting module, and between the third interface and the LIN signal receiving module. Signals can be sent to the LIN signal transmitting module through the second interface, and signals in the LIN signal transmitting module can be read through the second interface. Signals in the LIN signal receiving module can be transmitted through the third interface, and signals sent to the LIN signal receiving module by the third interface can be received and read, thereby realizing signal transmission and conversion.

[0052] The constant current source module includes a constant voltage circuit, a sampling resistor R4, an operational amplifier circuit and a regulating circuit which are electrically connected in sequence;

[0053] The constant voltage circuit includes a constant voltage chip U1, a resistor R3, an LED1, an LED2, an LED3, a resistor R2, a capacitor C2, a resistor R8, a resistor R9, a resistor R10, and a resistor R5. Pin 1 of the constant voltage chip U1 is connected to LED3 and capacitor C2, pin 2 of the constant voltage chip U1 is connected to the sliding end of the sliding resistor R2, capacitor C2, and resistor R8, pin 3 of the constant voltage chip U1 is connected to pin 6 of the constant voltage chip U1, pin 4 of the constant voltage chip U1 is grounded, pin 5 of the constant voltage chip U1 is connected to resistors R8 and R9, pin 7 of the constant voltage chip U1 is connected to LED1 and LED2, pin 8 of the constant voltage chip U1 is connected to resistor R3, resistors R9 and R10 are both grounded, resistor R10 is connected to LED2, a fixed end on one side of the sliding resistor R2 is connected to resistor R5, and a fixed end on the other side of the sliding resistor R2 is grounded;

[0054] The operational amplifier circuit includes a dual operational amplifier U3, a resistor R7, a capacitor C3, a capacitor C4, a capacitor C5, an inductor L1, a unidirectional diode D1, a capacitor C6, a capacitor C7, and a resistor R11. Pin 1 of the dual operational amplifier U3 is grounded, pin 2 of the dual operational amplifier U3 is connected to a fixed end on one side of the sampling resistor R4, both ends of the resistor R7 are respectively connected to pin 1 and pin 2 of the dual operational amplifier U3, pin 4 of the dual operational amplifier U3 is connected to capacitor C3, and pin 5 of the dual operational amplifier U3 is connected to capacitor C3, capacitor C4, Capacitor C5 is connected in series, pin 3 of dual operational amplifier U3 is connected in parallel with pin 6 of dual operational amplifier U3, unidirectional diode D1 is connected in series with pin 3 and pin 6 of dual operational amplifier U3, inductor L1 is connected in series with pin 3 and pin 6 of dual operational amplifier U3, one end of capacitor C6 is connected to the fixed end of sampling resistor R4, the other end of capacitor C6 is connected in series with unidirectional diode D1, capacitor C7 and resistor R11, capacitor C6, unidirectional diode D1, capacitor C7 and resistor R11 are grounded, and resistor R11 is connected to pin 6 of constant voltage chip U1;

[0055] The regulating circuit includes a regulating chip U2, a resistor R1, a resistor R6, a capacitor C1, and a capacitor C5. Pin 1 of the regulating chip U2 is connected in series with the resistor R1 and the resistor R6. Pin 2 of the regulating chip U2 is connected in series with the capacitor C1 and the resistor R6. Pin 3 of the regulating chip U2 is connected with the capacitor C5, the capacitor C4, the capacitor C3, and the pin 5 of the dual operational amplifier U3. The capacitor C5 is grounded.

[0056] In this embodiment, the circuit structure of the constant current source module is based on the constant voltage chip U1, and a dual operational amplifier U3, a sampling resistor R4 and related peripheral circuits are added. By comparing the voltage on the sampling resistor with the preset voltage, the result can be connected to the feedback pin of the constant voltage chip U1, thereby changing the constant voltage module to an adjustable constant current source module.

[0057] The LIN signal transmission module includes an analog interface DSUB2 and a LIN signal transmission unit which are electrically connected. The LIN signal transmission unit includes an electrostatic and overvoltage protection circuit 1, a common mode interference suppression circuit 1, a π-type filter circuit 1, a capacitor selection switch circuit 1, an inverting circuit 1, an optocoupler circuit 1, a signal laser transmission circuit 1, and a signal amplification circuit 1 which are electrically connected in sequence; the signal amplification circuit 1 is arranged between the signal laser transmission circuit 1 and the inverting circuit 1, and the electrostatic and overvoltage protection circuit 1 is connected to the analog interface DSUB2.

[0058] The electrostatic and overvoltage protection circuit 1 includes a gas discharge tube GDT3 and an ESD device D6, and the 7th pin of the analog interface DSUB2 is connected to the 1st pin of the gas discharge tube GDT3 and the 1st pin of the ESD device D6 respectively, and the 2nd pin of the gas discharge tube GDT3 and the 2nd pin of the ESD device D6 are both connected to the signal ground;

[0059] The common mode interference suppression circuit 1 comprises a magnetic bead L7 and a magnetic bead L6 connected in series, the magnetic bead L7 is connected to pin 3 of the analog interface DSUB2, and the magnetic bead L6 is grounded;

[0060] The π-type filter circuit 1 includes a capacitor C30, a capacitor C29, and an inductor L5, wherein the capacitor C29 is connected to one end of the inductor L5 and the ESD device D6, and the capacitor C30 is connected to the other end of the inductor L5, and the capacitor C30 and the capacitor C29 are grounded;

[0061] The capacitor selection switch circuit 1 includes a capacitor selection switch SW1, a capacitor C21, a capacitor C22, a resistor R44, a unidirectional diode D5, and a unidirectional diode D4. Pins 1, 2, and 3 of the capacitor selection switch SW1 are all connected to the inductor L5. Pin 5 of the capacitor selection switch SW1 is connected to the capacitor C21. Pin 6 of the capacitor selection switch SW1 is connected to the capacitor C22. The capacitors C21 and C22 are both grounded. Pin 7 of the capacitor selection switch SW1 is connected to the resistor R44. The resistor R44 is connected in series with the unidirectional diode D5. The unidirectional diode D5 is connected in series with the unidirectional diode D4.

[0062] The signal conversion circuit 1 includes a LIN transceiver chip U12, a capacitor C25, a capacitor C27, a capacitor C26, a resistor R46, a resistor R50, and a resistor R52. One end of the capacitor C21 and the capacitor C27 are connected in series with D5, and the other ends of the capacitor C21 and the capacitor C27 are grounded. Pin 1 of the LIN transceiver chip U12 is connected in series with the resistor R46 and the resistor R50, respectively. Pin 2 of the LIN transceiver chip U12 is connected in series with the resistor R52, and pin 7 of the LIN transceiver chip U12 is connected in series with the capacitor C27 and the capacitor C25, respectively. Pin 6 of the LIN transceiver chip U12 is connected in series with pin 1, pin 2, and pin 3 of the capacitor selection switch SW1, respectively. Pin 5 of the LIN transceiver chip U12 is grounded, and the capacitor C26 is connected to the resistor R46.

[0063] The inverter circuit 1 includes an inverter U11 and a capacitor C24, wherein the 14th pin of the inverter U11 is connected to the capacitor C24 and the supply voltage, the 7th pin of the inverter U11 is grounded, the 9th pin of the inverter U11 is connected to the resistor R50, the capacitor C24 is grounded, the 2nd pin and the 3rd pin of the inverter U11 are connected, the 4th pin and the 5th pin of the inverter U11 are connected, and the 6th pin and the 13th pin of the inverter U11 are connected;

[0064] The photoelectric coupling circuit 1 includes a photoelectric coupler U9, a resistor R41, a resistor R42, a resistor R43, and a capacitor C19, wherein the pin 2 of the photoelectric coupler U9 is connected to the pin 8 of the inverter U11, the pin 3 of the photoelectric coupler U9 is connected to the pin 2 of the photoelectric coupler U9, the pin 3 of the photoelectric coupler U9 is connected to the resistor R41, the resistor R41 is grounded, the pin 5 of the photoelectric coupler U9 is grounded, the pin 6 of the photoelectric coupler U9 is connected to the resistor R42, the pin 6 of the photoelectric coupler U9 is connected to the pin 7 of the photoelectric coupler U9, the pin 7 of the photoelectric coupler U9 is connected to the pin 12 of the inverter U11, the pin 8 of the photoelectric coupler U9 is respectively connected to the capacitor C19 and the power supply voltage, the capacitor C19 is grounded, and the resistor R43 is respectively connected to the pin 6 and pin 8 of the photoelectric coupler U9;

[0065] The signal laser transmitting circuit 1 includes a signal laser U10, a capacitor C20 and a capacitor C23, wherein the pins 1 and 9 of the signal laser U10 are grounded, the pin 8 of the signal laser U10 is connected to the resistor R42, the pin 6 of the signal laser U10 is respectively connected to the capacitor C20 and the power supply voltage, the pin 5 of the signal laser U10 is respectively connected to the capacitor C23 and the power supply voltage, and the capacitor C20 and the capacitor C23 are both grounded;

[0066] The signal amplifying circuit 1 includes a resistor R45, a capacitor C28, a transistor Q8, a transistor Q9, a resistor R48, a resistor R47 and a resistor R49. One end of the resistor R48 is connected to pin 2 of the signal laser U10, and the other end of the resistor R48 is connected in series with the capacitor C28 and the base of the transistor Q8 respectively. The collector of the transistor Q8 is connected in series with pin 5 of the signal laser U10, the capacitor C23 and the collector of the transistor Q9. The emitter of the transistor Q8 is connected to the resistor R51 and the resistor R47 respectively. The resistor R51 is grounded. The resistor R47 is connected to the base of the transistor Q9. The emitter of the transistor Q9 is connected to the resistor R49 and pin 1 of the inverter U11 respectively. The resistor R49 is grounded.

[0067] In order to adjust the voltage in the circuit to meet the operating conditions of the LIN signal transmitting module, the LIN signal transmitting module also includes a boost circuit, which includes a boost chip U8, a resistor R36, a resistor R37, a capacitor C17, an inductor L4, a unidirectional diode D3, a capacitor C18, a resistor R38, a resistor R39, a resistor R40, a capacitor C15, and a capacitor C16. Pin 1 of the boost chip U8 is connected to the unidirectional diode D3 and the inductor L4, pin 2 of the boost chip U8 is grounded, and pin 3 of the boost chip U8 is connected to the resistor R40 and R39 are connected, pin 4 of the boost chip U8 is connected to resistor R37, pin 5 of the boost chip U8 is connected to resistor R36, resistor R37 and inductor L4, the unidirectional diode D3 is connected to capacitor C18, resistor R38, capacitor C15 and capacitor C16, capacitor C18 is connected to capacitor R39, the resistor R38 is connected to resistor R39, the capacitor C15 and capacitor C16 are grounded, the resistor R40 is grounded, the capacitor C17 is grounded, and pin 1 of the boost chip U8 is connected to pin 7 of chip U12.

[0068] The LIN signal transmitting module also includes a transceiver indicator light circuit, which includes a resistor R29, a resistor R32, a transistor Q5 and a transistor Q7, a resistor R30, a resistor R24, a resistor R25, a transistor Q3, a transistor Q4, a transistor Q6, a resistor R33, a resistor R34, a resistor R35, a resistor R26, a resistor R27, a resistor R28, a resistor R23, a resistor R24, an LED4, and an LED5;

[0069] The resistor R29 is connected to pin 8 of the signal laser U5, the resistor R32 is connected to pin 2 of the signal laser U5, the base of the transistor Q5 is connected to the resistor R29, the collector of the transistor Q5 is connected to the resistor R30 and the base of the transistor Q4, the emitter of the transistor Q5 is connected to the emitters of the transistors Q3, Q4 and Q6, the base of the transistor Q7 is connected to the resistor R32, the collector of the transistor Q7 is connected to the resistor R31 and the base of the transistor Q6, the emitter of the transistor Q7 is connected to the emitters of the transistors Q3, Q4 and Q6, and the resistor R30 is connected in series with the resistor R31 The power supply voltage is connected in parallel, the resistor R25 is connected to the base of the transistor Q3, the collector of the transistor Q3 is connected to the resistor R23, the resistor R25 is connected to the resistor R24, the resistor R24 ​​is connected to LED4, the resistor R23 is connected to pin 1 of LED4, the collector of the transistor Q4 is respectively connected in series with the resistor R26, the resistor R27, and the resistor R28, the resistor R26, the resistor R27, and the resistor R28 are all connected in series with pin 1 of LED5, the collector of the transistor Q6 is respectively connected in series with the resistor R33, the resistor R34, and the resistor R35, the resistor R33, the resistor R34, and the resistor R35 are all connected in series with pin 2 of LED5.

[0070] The LIN signal receiving module is electrically connected to the analog interface DSUB4 and the LIN signal receiving unit. The LIN signal receiving unit includes an electrostatic and overvoltage protection circuit 2, a common mode interference suppression circuit 2, a π-type filter circuit 2, a capacitor selection switch circuit 2, an inverting circuit 2, a photoelectric coupling circuit 2, a signal laser transmitting circuit 2, and a signal amplifying circuit 2, which are electrically connected in sequence; the signal amplifying circuit 2 is arranged between the signal laser transmitting circuit 2 and the inverting circuit 2, and the electrostatic and overvoltage protection circuit 2 is connected to the analog interface DSUB4.

[0071] The second electrostatic and overvoltage protection circuit includes a gas discharge tube GDT6 and an ESD device D6, and the 7th pin of the analog interface DSUB4 is connected to the 1st pin of the gas discharge tube GDT6 and the 1st pin of the ESD device D10 respectively, and the 2nd pin of the gas discharge tube GDT6 and the 2nd pin of the ESD device D10 are both connected to the signal ground;

[0072] The second common mode interference suppression circuit comprises a magnetic bead L12 and a magnetic bead L11 connected in series, the magnetic bead L12 is connected to pin 3 of the analog interface DSUB2, and the magnetic bead L11 is grounded;

[0073] The second π-type filter circuit includes a capacitor C49, a capacitor C48, and an inductor L10. The capacitor C48 is connected to one end of the inductor L10 and the ESD device D6. The capacitor C49 is connected to the other end of the inductor L10. The capacitor C49 and the capacitor C48 are grounded.

[0074] The capacitor selection switch circuit 2 includes a capacitor selection switch SW2, a capacitor C41, a capacitor C42, a resistor R67, a unidirectional diode D9, and a unidirectional diode D4. Pins 1, 2, and 3 of the capacitor selection switch SW2 are all connected to the inductor L10. Pin 5 of the capacitor selection switch SW2 is connected to the capacitor C41. Pin 6 of the capacitor selection switch SW2 is connected to the capacitor C42. The capacitor C41 and the capacitor C42 are both grounded. Pin 7 of the capacitor selection switch SW2 is connected to the resistor R67. The resistor R67 is connected in series with the unidirectional diode D9. The unidirectional diode D9 is connected in series with the unidirectional diode D4.

[0075] The signal conversion circuit 2 includes a LIN transceiver chip U20, a capacitor C44, a capacitor C46, ​​a capacitor C45, a resistor R69, a resistor R72, and a resistor R75. One end of the capacitor C41 and the capacitor C46 are connected in series with D9, and the other ends of the capacitor C41 and the capacitor C46 are grounded. Pin 1 of the LIN transceiver chip U20 is connected in series with the resistor R69 and the resistor R72, respectively. Pin 2 of the LIN transceiver chip U20 is connected in series with the resistor R75, and pin 7 of the LIN transceiver chip U20 is connected in series with the capacitor C46 and the capacitor C44, respectively. Pin 6 of the LIN transceiver chip U20 is connected in series with pin 1, pin 2, and pin 3 of the capacitor selection switch SW2, respectively. Pin 5 of the LIN transceiver chip U20 is grounded, and the capacitor C45 is connected to the resistor R69.

[0076] The second inverter circuit includes an inverter U19 and a capacitor C43, wherein the 14th pin of the inverter U19 is connected to the capacitor C43 and the supply voltage, the 7th pin of the inverter U19 is grounded, the 9th pin of the inverter U19 is connected to the resistor R72, the capacitor C43 is grounded, the 2nd pin and the 3rd pin of the inverter U19 are connected, the 4th pin and the 5th pin of the inverter U19 are connected, and the 6th pin and the 13th pin of the inverter U19 are connected;

[0077] The photoelectric coupling circuit 2 includes a photoelectric coupler U17, a resistor R64, a resistor R65, a resistor R66, and a capacitor C38. Pin 2 of the photoelectric coupler U17 is connected to pin 8 of the inverter U19, pin 3 of the photoelectric coupler U17 is connected to pin 2 of the photoelectric coupler U17, pin 3 of the photoelectric coupler U17 is connected to resistor R64, the resistor R64 is grounded, pin 5 of the photoelectric coupler U17 is grounded, pin 6 of the photoelectric coupler U17 is connected to resistor R65, pin 6 of the photoelectric coupler U17 is connected to pin 7 of the photoelectric coupler U17, pin 7 of the photoelectric coupler U17 is connected to pin 12 of the inverter U19, pin 8 of the photoelectric coupler U17 is respectively connected to capacitor C38 and a power supply voltage, the capacitor C38 is grounded, and the resistor R66 is respectively connected to pin 6 and pin 8 of the photoelectric coupler U17;

[0078] The signal laser transmitting circuit 2 includes a signal laser U18, a capacitor C39 and a capacitor C40, the pins 1 and 9 of the signal laser U18 are grounded, the pin 8 of the signal laser U18 is connected to the resistor R65, the pin 6 of the signal laser U18 is respectively connected to the capacitor C39 and the power supply voltage, the pin 5 of the signal laser U18 is respectively connected to the capacitor C40 and the power supply voltage, and the capacitor C39 and the capacitor C40 are both grounded;

[0079] The signal amplification circuit 2 includes a resistor R68, a capacitor C47, a transistor Q12, a transistor Q13, a resistor R74, a resistor R70 and a resistor R71. One end of the resistor R74 is connected to pin 2 of the signal laser U18, and the other end of the resistor R74 is connected in series with the capacitor C47 and the base of the transistor Q12 respectively. The collector of the transistor Q12 is connected in series with pin 5 of the signal laser U18, the capacitor C40 and the collector of the transistor Q13. The emitter of the transistor Q12 is connected to the resistor R73 and the resistor R70 respectively. The resistor R73 is grounded. The resistor R70 is connected to the base of the transistor Q13. The emitter of the transistor Q13 is connected to the resistor R71 and pin 1 of the inverter U19 respectively. The resistor R71 is grounded.

[0080] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should be regarded as the protection scope of the utility model.

Claims

1. A LIN optoelectronic transceiver based on optical power supply, characterized in that: It includes a transmitting end and a receiving end, the transmitting end includes a constant current source module, a first energy supply module and a LIN signal transmitting module, and the constant current source module is electrically connected to the first energy supply module; the receiving end includes a second energy supply module and a LIN signal receiving module; the first energy supply module and the second energy supply module are connected through a first optical fiber; the LIN signal transmitting module includes an electrically connected analog interface DSUB2 and a LIN signal transmitting unit, the LIN signal receiving module includes an electrically connected analog interface DSUB4 and a LIN signal receiving unit, and the LIN signal transmitting unit and the LIN signal receiving unit are connected through a second optical fiber.

2. The LIN optoelectronic transceiver device based on optical power supply according to claim 1, characterized in that: The constant current source module includes a constant voltage circuit, a sampling resistor R4, an operational amplifier circuit and a regulating circuit which are electrically connected in sequence; The constant voltage circuit includes a constant voltage chip U1, a resistor R3, an LED1, an LED2, an LED3, a resistor R2, a capacitor C2, a resistor R8, a resistor R9, a resistor R10, and a resistor R5. Pin 1 of the constant voltage chip U1 is connected to LED3 and capacitor C2, pin 2 of the constant voltage chip U1 is connected to the sliding end of the sliding resistor R2, capacitor C2, and resistor R8, pin 3 of the constant voltage chip U1 is connected to pin 6 of the constant voltage chip U1, pin 4 of the constant voltage chip U1 is grounded, pin 5 of the constant voltage chip U1 is connected to resistors R8 and R9, pin 7 of the constant voltage chip U1 is connected to LED1 and LED2, pin 8 of the constant voltage chip U1 is connected to resistor R3, resistors R9 and R10 are both grounded, resistor R10 is connected to LED2, a fixed end on one side of the sliding resistor R2 is connected to resistor R5, and a fixed end on the other side of the sliding resistor R2 is grounded; The operational amplifier circuit includes a dual operational amplifier U3, a resistor R7, a capacitor C3, a capacitor C4, a capacitor C5, an inductor L1, a unidirectional diode D1, a capacitor C6, a capacitor C7, and a resistor R11. Pin 1 of the dual operational amplifier U3 is grounded, pin 2 of the dual operational amplifier U3 is connected to a fixed end on one side of a sampling resistor R4, both ends of the resistor R7 are respectively connected to pin 1 and pin 2 of the dual operational amplifier U3, pin 4 of the dual operational amplifier U3 is connected to capacitor C3, and pin 5 of the dual operational amplifier U3 is connected to capacitor C3, capacitor C4, and resistor R11. The capacitor C5 is connected in series, the 3rd pin of the dual operational amplifier U3 is connected in parallel with the 6th pin of the dual operational amplifier U3, the unidirectional diode D1 is connected in series with the 3rd pin and the 6th pin of the dual operational amplifier U3, the inductor L1 is connected in series with the 3rd pin and the 6th pin of the dual operational amplifier U3, one end of the capacitor C6 is connected to the fixed end of the sampling resistor R4, the other end of the capacitor C6 is connected in series with the unidirectional diode D1, the capacitor C7 and the resistor R11, the capacitor C6, the unidirectional diode D1, the capacitor C7 and the resistor R11 are grounded, and the resistor R11 is connected to the 6th pin of the constant voltage chip U1; The regulating circuit includes a regulating chip U2, a resistor R1, a resistor R6, a capacitor C1, and a capacitor C5. Pin 1 of the regulating chip U2 is connected in series with the resistor R1 and the resistor R6. Pin 2 of the regulating chip U2 is connected in series with the capacitor C1 and the resistor R6. Pin 3 of the regulating chip U2 is connected with the capacitor C5, the capacitor C4, the capacitor C3, and the pin 5 of the dual operational amplifier U3. The capacitor C5 is grounded.

3. The LIN optoelectronic transceiver based on optical power supply according to claim 1, characterized in that: The LIN signal transmitting unit includes an electrostatic and overvoltage protection circuit 1, a common mode interference suppression circuit 1, a π-type filter circuit 1, a capacitor selection switch circuit 1, an inverter circuit 1, a photoelectric coupling circuit 1, a signal laser transmitting circuit 1, and a signal amplifying circuit 1, which are electrically connected in sequence; the signal amplifying circuit 1 is arranged between the signal laser transmitting circuit 1 and the inverter circuit 1, and the electrostatic and overvoltage protection circuit 1 is connected to the analog interface DSUB2.

4. The LIN optoelectronic transceiver device based on optical power supply according to claim 3, characterized in that: The electrostatic and overvoltage protection circuit 1 includes a gas discharge tube GDT3 and an ESD device D6, and the 7th pin of the analog interface DSUB2 is connected to the 1st pin of the gas discharge tube GDT3 and the 1st pin of the ESD device D6 respectively, and the 2nd pin of the gas discharge tube GDT3 and the 2nd pin of the ESD device D6 are both connected to the signal ground; The common mode interference suppression circuit 1 comprises a magnetic bead L7 and a magnetic bead L6 connected in series, the magnetic bead L7 is connected to pin 3 of the analog interface DSUB2, and the magnetic bead L6 is grounded; The π-type filter circuit 1 includes a capacitor C30, a capacitor C29, and an inductor L5, wherein the capacitor C29 is connected to one end of the inductor L5 and the ESD device D6, and the capacitor C30 is connected to the other end of the inductor L5, and the capacitor C30 and the capacitor C29 are grounded; The capacitor selection switch circuit 1 includes a capacitor selection switch SW1, a capacitor C21, a capacitor C22, a resistor R44, a unidirectional diode D5, and a unidirectional diode D4. Pins 1, 2, and 3 of the capacitor selection switch SW1 are all connected to the inductor L5. Pin 5 of the capacitor selection switch SW1 is connected to the capacitor C21. Pin 6 of the capacitor selection switch SW1 is connected to the capacitor C22. The capacitors C21 and C22 are both grounded. Pin 7 of the capacitor selection switch SW1 is connected to the resistor R44. The resistor R44 is connected in series with the unidirectional diode D5. The unidirectional diode D5 is connected in series with the unidirectional diode D4. The signal conversion circuit 1 includes a LIN transceiver chip U12, a capacitor C25, a capacitor C27, a capacitor C26, a resistor R46, a resistor R50, and a resistor R52. One end of the capacitor C21 and the capacitor C27 are connected in series with D5, and the other ends of the capacitor C21 and the capacitor C27 are grounded. Pin 1 of the LIN transceiver chip U12 is connected in series with the resistor R46 and the resistor R50, respectively. Pin 2 of the LIN transceiver chip U12 is connected in series with the resistor R52, and pin 7 of the LIN transceiver chip U12 is connected in series with the capacitor C27 and the capacitor C25, respectively. Pin 6 of the LIN transceiver chip U12 is connected in series with pin 1, pin 2, and pin 3 of the capacitor selection switch SW1, respectively. Pin 5 of the LIN transceiver chip U12 is grounded, and the capacitor C26 is connected to the resistor R46. The inverter circuit 1 includes an inverter U11 and a capacitor C24, wherein the 14th pin of the inverter U11 is connected to the capacitor C24 and the supply voltage, the 7th pin of the inverter U11 is grounded, the 9th pin of the inverter U11 is connected to the resistor R50, the capacitor C24 is grounded, the 2nd pin and the 3rd pin of the inverter U11 are connected, the 4th pin and the 5th pin of the inverter U11 are connected, and the 6th pin and the 13th pin of the inverter U11 are connected; The photoelectric coupling circuit 1 includes a photoelectric coupler U9, a resistor R41, a resistor R42, a resistor R43, and a capacitor C19, wherein the pin 2 of the photoelectric coupler U9 is connected to the pin 8 of the inverter U11, the pin 3 of the photoelectric coupler U9 is connected to the pin 2 of the photoelectric coupler U9, the pin 3 of the photoelectric coupler U9 is connected to the resistor R41, the resistor R41 is grounded, the pin 5 of the photoelectric coupler U9 is grounded, the pin 6 of the photoelectric coupler U9 is connected to the resistor R42, the pin 6 of the photoelectric coupler U9 is connected to the pin 7 of the photoelectric coupler U9, the pin 7 of the photoelectric coupler U9 is connected to the pin 12 of the inverter U11, the pin 8 of the photoelectric coupler U9 is respectively connected to the capacitor C19 and the power supply voltage, the capacitor C19 is grounded, and the resistor R43 is respectively connected to the pin 6 and pin 8 of the photoelectric coupler U9; The signal laser transmitting circuit 1 includes a signal laser U10, a capacitor C20 and a capacitor C23, wherein the pins 1 and 9 of the signal laser U10 are grounded, the pin 8 of the signal laser U10 is connected to the resistor R42, the pin 6 of the signal laser U10 is respectively connected to the capacitor C20 and the power supply voltage, the pin 5 of the signal laser U10 is respectively connected to the capacitor C23 and the power supply voltage, and the capacitor C20 and the capacitor C23 are both grounded; The signal amplifying circuit 1 includes a resistor R45, a capacitor C28, a transistor Q8, a transistor Q9, a resistor R48, a resistor R47 and a resistor R49. One end of the resistor R48 is connected to pin 2 of the signal laser U10, and the other end of the resistor R48 is connected in series with the capacitor C28 and the base of the transistor Q8 respectively. The collector of the transistor Q8 is connected in series with pin 5 of the signal laser U10, the capacitor C23 and the collector of the transistor Q9. The emitter of the transistor Q8 is connected to the resistor R51 and the resistor R47 respectively. The resistor R51 is grounded. The resistor R47 is connected to the base of the transistor Q9. The emitter of the transistor Q9 is connected to the resistor R49 and pin 1 of the inverter U11 respectively. The resistor R49 is grounded.

5. The LIN optoelectronic transceiver device based on optical power supply according to claim 4, characterized in that: The LIN signal transmission module also includes a boost circuit, which includes a boost chip U8, a resistor R36, a resistor R37, a capacitor C17, an inductor L4, a unidirectional diode D3, a capacitor C18, a resistor R38, a resistor R39, a resistor R40, a capacitor C15, and a capacitor C16. Pin 1 of the boost chip U8 is connected to the unidirectional diode D3 and the inductor L4, pin 2 of the boost chip U8 is grounded, pin 3 of the boost chip U8 is connected to resistors R40 and R39, and pin 4 of the boost chip U8 is connected to the ground. Pin 4 of chip U8 is connected to resistor R37, pin 5 of the boost chip U8 is connected to resistor R36, resistor R37, and inductor L4, the unidirectional diode D3 is connected to capacitor C18, resistor R38, capacitor C15, and capacitor C16, capacitor C18 is connected to capacitor R39, the resistor R38 is connected to resistor R39, the capacitor C15 and capacitor C16 are grounded, the resistor R40 is grounded, the capacitor C17 is grounded, and pin 1 of the boost chip U8 is connected to pin 7 of chip U12.

6. The optically powered LIN optoelectronic transceiver according to claim 5, characterized in that: The LIN signal transmitting module also includes a transceiver indicator light circuit, which includes a resistor R29, a resistor R32, a transistor Q5 and a transistor Q7, a resistor R30, a resistor R24, a resistor R25, a transistor Q3, a transistor Q4, a transistor Q6, a resistor R33, a resistor R34, a resistor R35, a resistor R26, a resistor R27, a resistor R28, a resistor R23, a resistor R24, an LED4, and an LED5; The resistor R29 is connected to pin 8 of the signal laser U5, the resistor R32 is connected to pin 2 of the signal laser U5, the base of the transistor Q5 is connected to the resistor R29, the collector of the transistor Q5 is connected to the resistor R30 and the base of the transistor Q4, the emitter of the transistor Q5 is connected to the emitters of the transistors Q3, Q4 and Q6, the base of the transistor Q7 is connected to the resistor R32, the collector of the transistor Q7 is connected to the resistor R31 and the base of the transistor Q6, the emitter of the transistor Q7 is connected to the emitters of the transistors Q3, Q4 and Q6, and the resistor R30 is connected in series with the resistor R31 The power supply voltage is connected in parallel, the resistor R25 is connected to the base of the transistor Q3, the collector of the transistor Q3 is connected to the resistor R23, the resistor R25 is connected to the resistor R24, the resistor R24 ​​is connected to LED4, the resistor R23 is connected to pin 1 of LED4, the collector of the transistor Q4 is respectively connected in series with the resistor R26, the resistor R27, and the resistor R28, the resistor R26, the resistor R27, and the resistor R28 are all connected in series with pin 1 of LED5, the collector of the transistor Q6 is respectively connected in series with the resistor R33, the resistor R34, and the resistor R35, the resistor R33, the resistor R34, and the resistor R35 are all connected in series with pin 2 of LED5.

7. The LIN optoelectronic transceiver based on optical power supply according to claim 1, characterized in that: The LIN signal receiving module is electrically connected to the analog interface DSUB4 and the LIN signal receiving unit; The LIN signal receiving unit includes an electrostatic and overvoltage protection circuit 2, a common mode interference suppression circuit 2, a π-type filter circuit 2, a capacitor selection switch circuit 2, an inverter circuit 2, a photoelectric coupling circuit 2, a signal laser transmitting circuit 2, and a signal amplifying circuit 2, which are electrically connected in sequence; the signal amplifying circuit 2 is arranged between the signal laser transmitting circuit 2 and the inverter circuit 2, and the electrostatic and overvoltage protection circuit 2 is connected to the analog interface DSUB4.

8. The LIN optoelectronic transceiver based on optical power supply according to claim 7, characterized in that: The second electrostatic and overvoltage protection circuit includes a gas discharge tube GDT6 and an ESD device D6, and the 7th pin of the analog interface DSUB4 is connected to the 1st pin of the gas discharge tube GDT6 and the 1st pin of the ESD device D10 respectively, and the 2nd pin of the gas discharge tube GDT6 and the 2nd pin of the ESD device D10 are both connected to the signal ground; The second common mode interference suppression circuit comprises a magnetic bead L12 and a magnetic bead L11 connected in series, the magnetic bead L12 is connected to pin 3 of the analog interface DSUB2, and the magnetic bead L11 is grounded; The second π-type filter circuit includes a capacitor C49, a capacitor C48, and an inductor L10. The capacitor C48 is connected to one end of the inductor L10 and the ESD device D6. The capacitor C49 is connected to the other end of the inductor L10. The capacitor C49 and the capacitor C48 are grounded. The capacitor selection switch circuit 2 includes a capacitor selection switch SW2, a capacitor C41, a capacitor C42, a resistor R67, a unidirectional diode D9, and a unidirectional diode D4. Pins 1, 2, and 3 of the capacitor selection switch SW2 are all connected to the inductor L10. Pin 5 of the capacitor selection switch SW2 is connected to the capacitor C41. Pin 6 of the capacitor selection switch SW2 is connected to the capacitor C42. The capacitor C41 and the capacitor C42 are both grounded. Pin 7 of the capacitor selection switch SW2 is connected to the resistor R67. The resistor R67 is connected in series with the unidirectional diode D9. The unidirectional diode D9 is connected in series with the unidirectional diode D4. The signal conversion circuit 2 includes a LIN transceiver chip U20, a capacitor C44, a capacitor C46, ​​a capacitor C45, a resistor R69, a resistor R72, and a resistor R75. One end of the capacitor C41 and the capacitor C46 are connected in series with D9, and the other ends of the capacitor C41 and the capacitor C46 are grounded. Pin 1 of the LIN transceiver chip U20 is connected in series with the resistor R69 and the resistor R72, respectively. Pin 2 of the LIN transceiver chip U20 is connected in series with the resistor R75, and pin 7 of the LIN transceiver chip U20 is connected in series with the capacitor C46 and the capacitor C44, respectively. Pin 6 of the LIN transceiver chip U20 is connected in series with pin 1, pin 2, and pin 3 of the capacitor selection switch SW2, respectively. Pin 5 of the LIN transceiver chip U20 is grounded, and the capacitor C45 is connected to the resistor R69. The second inverter circuit includes an inverter U19 and a capacitor C43, wherein the 14th pin of the inverter U19 is connected to the capacitor C43 and the supply voltage, the 7th pin of the inverter U19 is grounded, the 9th pin of the inverter U19 is connected to the resistor R72, the capacitor C43 is grounded, the 2nd pin and the 3rd pin of the inverter U19 are connected, the 4th pin and the 5th pin of the inverter U19 are connected, and the 6th pin and the 13th pin of the inverter U19 are connected; The photoelectric coupling circuit 2 includes a photoelectric coupler U17, a resistor R64, a resistor R65, a resistor R66, and a capacitor C38. Pin 2 of the photoelectric coupler U17 is connected to pin 8 of the inverter U19, pin 3 of the photoelectric coupler U17 is connected to pin 2 of the photoelectric coupler U17, pin 3 of the photoelectric coupler U17 is connected to resistor R64, the resistor R64 is grounded, pin 5 of the photoelectric coupler U17 is grounded, pin 6 of the photoelectric coupler U17 is connected to resistor R65, pin 6 of the photoelectric coupler U17 is connected to pin 7 of the photoelectric coupler U17, pin 7 of the photoelectric coupler U17 is connected to pin 12 of the inverter U19, pin 8 of the photoelectric coupler U17 is respectively connected to capacitor C38 and a power supply voltage, the capacitor C38 is grounded, and the resistor R66 is respectively connected to pin 6 and pin 8 of the photoelectric coupler U17; The signal laser transmitting circuit 2 includes a signal laser U18, a capacitor C39 and a capacitor C40, the pins 1 and 9 of the signal laser U18 are grounded, the pin 8 of the signal laser U18 is connected to the resistor R65, the pin 6 of the signal laser U18 is respectively connected to the capacitor C39 and the power supply voltage, the pin 5 of the signal laser U18 is respectively connected to the capacitor C40 and the power supply voltage, and the capacitor C39 and the capacitor C40 are both grounded; The signal amplification circuit 2 includes a resistor R68, a capacitor C47, a transistor Q12, a transistor Q13, a resistor R74, a resistor R70 and a resistor R71. One end of the resistor R74 is connected to pin 2 of the signal laser U18, and the other end of the resistor R74 is connected in series with the capacitor C47 and the base of the transistor Q12 respectively. The collector of the transistor Q12 is connected in series with pin 5 of the signal laser U18, the capacitor C40 and the collector of the transistor Q13. The emitter of the transistor Q12 is connected to the resistor R73 and the resistor R70 respectively. The resistor R73 is grounded. The resistor R70 is connected to the base of the transistor Q13. The emitter of the transistor Q13 is connected to the resistor R71 and pin 1 of the inverter U19 respectively. The resistor R71 is grounded.

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