Satellite rotating cabin signal transmission system and method based on photoelectric slip ring

Abstract

The application relates to a satellite rotating cabin signal transmission system and method based on an optoelectronic slip ring, which comprises a baseline conversion module located in a satellite rotating cabin, the baseline conversion module being used for converting digital signals and optical signals into coupled optical signals or converting the coupled optical signals into digital signals and optical signals; an optoelectronic slip ring located in a rotating table, the optoelectronic slip ring comprising an optical slip ring and an electric slip ring, the optoelectronic slip ring being driven to rotate through the rotating table, the optoelectronic slip ring being used for non-contact transmission of optical signals or electric signals; and a platform conversion module located in a satellite platform cabin, the platform conversion module being used for converting digital signals and optical signals into coupled optical signals or converting the coupled optical signals into digital signals and optical signals. The satellite rotating cabin signal transmission system and method based on the optoelectronic slip ring provided by the application can realize signal transmission in a rotating mode through the optoelectronic slip ring for star-borne high-speed electric signals, digital signals and optical signals, and can realize lossless and high-speed transmission of data.

Description

Technical Field

[0001] This invention relates to the field of spacecraft communication technology, and in particular to a satellite rotating cabin signal transmission system and method based on an optoelectronic slip ring. Background Technology

[0002] Currently, there are numerous spacecraft in orbit, evolving from satellites that initially carried no scientific instruments to space stations and deep-space landers with complex functions. To adapt to complex environments or complete specific missions, spacecraft mechanical mechanisms need to rotate relative to each other. To ensure data transfer between relatively rotating spacecraft components, conductive slip rings are needed to establish electrical pathways for data transmission between these components.

[0003] Currently, in terms of signal transmission technology for spaceborne rotating mechanisms, considering the reliability of signal transmission, conductive slip rings and similar products are mainly used. These products primarily face the following problems:

[0004] 1. Conductive slip rings and similar products mainly achieve contact transmission of electrical signals through the brush filaments of the slip ring. The signal stability during the transmission process is affected by the dynamic contact resistance of the conductive slip ring, which can easily lead to transmission errors.

[0005] 2. Existing conductive slip rings transmit signals through frictional contact, and their service life is related to the degree of wear.

[0006] 3. Common signal transmission and signal level conversion methods such as CAN bus, RS422 bus, LVDS, and optical signals are relatively mature in ground rotating mechanism equipment. However, in space applications such as satellites, the amount and rate of data transmitted between existing conductive slip ring rotating components and fixed platforms are limited due to factors such as the wear and tear of rotating mechanisms and the reliability of signal transmission.

[0007] 4. For existing conductive slip rings, the number of signal transmission paths is positively correlated with the number of channels in the conductive slip ring. As the number of signal transmission paths increases, the weight and volume of the conductive slip ring increase exponentially, which is not conducive to the lightweighting and miniaturization of complex signal transmission in spaceborne systems. Summary of the Invention

[0008] To address some or all of the problems in the prior art, this invention provides a satellite rotating cabin signal transmission system based on an optoelectronic slip ring, the system comprising:

[0009] A baseline conversion module, located in the satellite rotating cabin, is used to convert digital signals and optical signals into coupled optical signals or to convert coupled optical signals into digital signals and optical signals.

[0010] An optoelectronic slip ring, located in a turntable, comprises a smooth ring and an electrical slip ring. The optoelectronic slip ring is driven to rotate by the turntable and is used for non-contact transmission of optical or electrical signals.

[0011] The platform conversion module, located in the satellite platform cabin, is used to convert digital signals and optical signals into coupled optical signals or to convert coupled optical signals into digital signals and optical signals.

[0012] Furthermore, the smooth ring and the electric slip ring are connected in series; the smooth ring includes a smooth ring stator and a smooth ring rotor; the electric slip ring includes an electric slip ring stator and an electric slip ring rotor;

[0013] The smooth ring rotor and the electric slip ring rotor are connected via a shift fork mechanism. The turntable stator is connected to both the smooth ring stator and the electric slip ring stator. The electric slip ring is driven to rotate by a primary shift fork mechanism, and the smooth ring is driven to rotate by a secondary shift fork mechanism.

[0014] The smooth ring rotor is connected to the baseline conversion module, and the smooth ring stator is connected to the platform conversion module.

[0015] Furthermore, the digital signal includes one or more of the following: a CAN signal, an RS422 signal, or an LVDS signal; and / or

[0016] The optical signal includes one or more of the satellite rotation module optical signal or the satellite platform module optical signal.

[0017] Furthermore, the baseline conversion module includes a digital optical module and / or a wavelength conversion module; and / or

[0018] The platform conversion module includes a digital optical module and / or a wavelength conversion module.

[0019] Furthermore, the digital optical module includes an input digital optical module and a receiving digital optical module, wherein the input digital optical module is used to convert digital signals into optical signals, and the receiving digital optical module is used to convert optical signals into digital signals; and / or

[0020] The wavelength conversion module includes an input wavelength conversion module and a receiving wavelength conversion module, which are used to convert the input optical signal into an optical signal of a specific wavelength according to requirements.

[0021] Furthermore, the baseline conversion module and the platform conversion module also include a wavelength division multiplexer;

[0022] The wavelength division multiplexer is used to couple multiple optical signals into the same optical fiber and input the coupled optical signals into the optoelectronic slip ring; the wavelength division multiplexer is also used to recover multiple optical signals from the coupled optical signals output by the optoelectronic slip ring and input the recovered multiple optical signals into the digital optical module or the wavelength conversion module.

[0023] This invention also provides a satellite rotating cabin signal transmission method based on an optoelectronic slip ring, the method comprising the following steps:

[0024] The input digital optical module converts the input multiple digital signals into multiple optical signals, the input wavelength conversion module converts the input optical signals into optical signals of the required wavelength, and the multiple optical signals and the optical signals of the required wavelength are input into the optical transmission wavelength division multiplexer.

[0025] The optical transmission wavelength division multiplexer couples the input optical signal into the same optical fiber and inputs the coupled optical signal into the photoelectric slip ring;

[0026] The photoelectric slip ring transmits the optical signal to the optical receiving wavelength division multiplexer.

[0027] The optical receiving wavelength division multiplexer recovers the coupled optical signal output from the optoelectronic slip ring into multiple optical signals, and inputs the recovered multiple optical signals into the receiving digital optical module and the receiving wavelength conversion module; and

[0028] The receiving digital optical module and the receiving wavelength conversion module convert the recovered multi-channel optical signals into digital signals or optical signals, and output the converted signals.

[0029] Furthermore, the input multiplexed signal includes one or more of CAN signal, RS422 signal, or LVDS signal; and / or

[0030] The input optical signal includes one or more of the satellite rotary cabin optical signal or the satellite platform cabin optical signal.

[0031] Furthermore, the photoelectric slip ring includes a single-channel photoelectric slip ring or a multi-channel photoelectric slip ring.

[0032] Furthermore, the RS422 signal or LVDS signal is converted into multiple optical signals by the input digital optical module; and

[0033] The CAN signal is converted into an optical signal through a protocol conversion and then converted into an optical signal through the input digital optical module.

[0034] The technical solution provided by this invention has the following beneficial effects:

[0035] 1. The satellite rotating cabin signal transmission system and method based on photoelectric slip ring provided by this invention enables the transmission of high-speed electrical signals, digital signals, and optical signals in rotation mode via photoelectric slip ring, achieving lossless and high-speed data transmission. The satellite rotating cabin signal transmission system and method based on photoelectric slip ring provided by this invention has been successfully applied to the transmission and conversion of on-orbit optical signals, CAN signals, RS422 signals, and LVDS signals between a satellite rotating cabin and platform cabin.

[0036] 2. The satellite rotating cabin signal transmission system based on photoelectric slip ring provided by the present invention uses photoelectric slip ring to modulate different signals to different optical wavelengths, realizing the transmission of various digital signals in a single channel or multiple channels, which is beneficial to the lightweighting and miniaturization of complex signal transmission in spaceborne systems.

[0037] 3. The satellite rotating cabin signal transmission system based on optoelectronic slip ring provided by the present invention can couple optical signals to one or more optical fibers through one or more wavelength division multiplexers. For important signals, multi-channel hot backup transmission can be used to achieve electrical signal conversion and optical channel transmission redundancy, which can meet the high reliability and high stability transmission requirements of aerospace. Attached Figure Description

[0038] To further illustrate the above and other advantages and features of the various embodiments of the present invention, a more specific description of the various embodiments of the present invention will be presented with reference to the accompanying drawings. It is to be understood that these drawings depict only typical embodiments of the invention and are therefore not intended to limit its scope. In the drawings, identical or corresponding parts will be indicated by identical or similar reference numerals for clarity.

[0039] Figure 1 A schematic diagram of the satellite rotating cabin compartment design according to an embodiment of the present invention is shown;

[0040] Figure 2 A schematic diagram of a satellite rotating cabin signal transmission system based on an optoelectronic slip ring according to an embodiment of the present invention is shown;

[0041] Figure 3 A schematic diagram of a photoelectric slip ring structure according to an embodiment of the present invention is shown;

[0042] Figure 4 A schematic flowchart of a satellite rotating cabin signal transmission method based on an optoelectronic slip ring according to an embodiment of the present invention is shown.

[0043] Figure 5 A schematic diagram of a single-channel satellite rotary cabin signal transmission method based on an optoelectronic slip ring according to an embodiment of the present invention is shown; and

[0044] Figure 6A schematic diagram of a multi-channel satellite rotating cabin signal transmission method based on an optoelectronic slip ring according to an embodiment of the present invention is shown. Detailed Implementation

[0045] In the following description, the invention is described with reference to various embodiments. However, those skilled in the art will recognize that the embodiments may be practiced without one or more specific details or with other alternatives and / or additional methods or components. In other instances, well-known structures or operations are not shown or described in detail so as not to obscure the inventive points of the invention. Similarly, for illustrative purposes, specific numbers and configurations are set forth to provide a comprehensive understanding of embodiments of the invention. However, the invention is not limited to these specific details.

[0046] In this specification, references to "an embodiment" or "this embodiment" mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in at least one embodiment of the invention. The phrase "in one embodiment" appearing throughout this specification does not necessarily refer to the same embodiment in all instances.

[0047] It should be noted that the embodiments of the present invention describe the method steps in a specific order; however, this is only for illustrating the specific embodiment and not for limiting the order of the steps. On the contrary, in different embodiments of the present invention, the order of the steps can be adjusted according to actual needs.

[0048] In this invention, the modules of the system according to the invention can be implemented using software, hardware, firmware, or a combination thereof. When a module is implemented using software, its function can be implemented through computer program flow. For example, the module can be implemented using code segments (such as code segments in languages ​​like C and C++) stored in a storage device (such as a hard disk, memory, etc.), wherein the corresponding function of the module can be implemented when the code segment is executed by a processor. When a module is implemented using hardware, its function can be implemented by setting a corresponding hardware structure. For example, the module's function can be implemented by hardware programming a programmable device such as a field-programmable gate array (FPGA), or by designing an application-specific integrated circuit (ASIC) including multiple transistors, resistors, capacitors, and other electronic devices. When a module is implemented using firmware, the module's function can be written into a read-only memory such as an EPROM or EEPROM in the form of program code, and the corresponding function of the module can be implemented when the program code is executed by a processor. In addition, some functions of the module may need to be implemented by separate hardware or by working in cooperation with the hardware. For example, the detection function is implemented by the corresponding sensor (such as a proximity sensor, accelerometer, gyroscope, etc.), the signal transmission function is implemented by the corresponding communication device (such as a Bluetooth device, infrared communication device, baseband communication device, Wi-Fi communication device, etc.), the output function is implemented by the corresponding output device (such as a display, speaker, etc.), and so on.

[0049] This invention primarily addresses the problem of cable entanglement during digital signal transmission via wires through a rotating cabin. While traditional electric slip rings can resolve this issue, their friction pair contact characteristics can lead to transmission errors and wear, severely impacting signal transmission rates. To solve the application problems of power and signal transmission in satellite rotation mode, this invention provides a satellite rotating cabin signal transmission system and method based on an optoelectronic slip ring. This system enables the transmission of high-speed electrical, digital, and optical signals during rotation mode via the optoelectronic slip ring, achieving lossless and high-speed data transmission. The satellite rotating cabin signal transmission system and method based on an optoelectronic slip ring provided by this invention has been successfully applied to the transmission and conversion of on-orbit optical, CAN, RS422, and LVDS signals between a satellite rotating cabin and platform cabin.

[0050] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0051] Figure 1 A schematic diagram of the satellite rotating module compartment design according to an embodiment of the present invention is shown. Figure 1 As shown, the satellite rotating cabin 1, also known as the satellite payload cabin, rotates at an angular velocity ω. The satellite rotating cabin 1 is connected to the turntable 2, while the satellite platform cabin 3 remains stationary.

[0052] Figure 2 A schematic diagram of a satellite rotating cabin signal transmission system based on an optoelectronic slip ring, according to an embodiment of the present invention, is shown. Figure 2 As shown, the satellite rotating cabin signal transmission system based on an optoelectronic slip ring includes a baseline conversion module 10, an optoelectronic slip ring 20, and a platform conversion module 30. The baseline conversion module 10 is located in the satellite rotating cabin 1 and is used to convert digital signals and optical signals into coupled optical signals, or to convert coupled optical signals into digital signals and optical signals. The optoelectronic slip ring 20 is located in the turntable 2 and includes a smooth ring and an electric slip ring. The optoelectronic slip ring 20 is driven to rotate by the turntable 2 and is used for non-contact transmission of optical or electrical signals. The platform conversion module 30 is located in the satellite platform cabin 3 and is used to convert digital signals and optical signals into coupled optical signals, or to convert coupled optical signals into digital signals and optical signals. In one embodiment of the invention, the digital signal includes one or more of CAN signals, RS422 signals, or LVDS signals; and / or the optical signal includes one or more of satellite rotating cabin optical signals or satellite platform cabin optical signals.

[0053] Figure 3A schematic diagram of an optoelectronic slip ring structure according to an embodiment of the present invention is shown. As shown, a smooth ring 201 and an electric slip ring 202 are connected in series. The smooth ring 201 includes a smooth ring stator 205 and a smooth ring rotor 204; the electric slip ring 202 includes an electric slip ring stator 207 and an electric slip ring rotor 208. The smooth ring rotor 204 and the electric slip ring rotor 208 transmit driving torque through a two-stage shift fork mechanism. The turntable stator 203 is connected to the smooth ring stator 205 and the electric slip ring stator 207. The motor output shaft 210 drives the first-stage shift fork mechanism 209, which in turn drives the electric slip ring 202 to rotate. The second-stage shift fork mechanism 206 then drives the smooth ring 201 to rotate. The angular velocity of the motor output shaft 210 is ω. The installation steps for the smooth ring 201 and the electric slip ring 202 are as follows: First, install the electric slip ring rotor 208 and the smooth ring rotor 204 through a shift fork mechanism, adjusting the coaxiality and perpendicularity of the installation to achieve synchronous rotation of the two slip rings; then, install the turntable stator 203 with the smooth ring stator 205 and the electric slip ring stator 207, adjusting the coaxiality and perpendicularity of the slip ring and the turntable installation, connecting the turntable motor rotor end to the photoelectric slip ring rotor end, driving the electric slip ring to rotate by the turntable shift fork, and then achieving synchronous drive of the smooth ring by the electric slip ring shift fork; the shift fork mechanism adopts a clearance fit, and the requirements for shaft system installation accuracy are not high. The smooth ring rotor 204 is connected to the baseline conversion module 10, and the smooth ring stator 205 is connected to the platform conversion module 30, thereby realizing the interconnection of the external signal channels of the smooth ring 201. The platform conversion module 30 is connected to the corresponding single-unit power supply interface and remote control and telemetry signal of the satellite platform cabin 3, and the baseline conversion module 10 is connected to the corresponding single-unit power supply interface and remote control and telemetry signal of the satellite rotating cabin 1. The signal transmission mechanism is as follows: data is sent by a single unit corresponding to satellite rotating cabin 1, and the correctness of the received data is tested by a single unit corresponding to satellite platform cabin 3; or data is sent by a single unit corresponding to satellite platform cabin 3, and the correctness of the received data is tested by a single unit corresponding to satellite rotating cabin 1.

[0054] In one embodiment of the present invention, the baseline conversion module 10 includes a digital optical module and / or a wavelength conversion module; and / or the platform conversion module 30 includes a digital optical module and / or a wavelength conversion module. In one embodiment of the present invention, the digital optical module includes an input digital optical module and a receiving digital optical module, wherein the input digital optical module is used to convert a digital signal into an optical signal, and the receiving digital optical module is used to convert the optical signal into a digital signal. In one embodiment of the present invention, the wavelength conversion module includes an input wavelength conversion module and a receiving wavelength conversion module, wherein the input wavelength conversion module and the receiving wavelength conversion module are used to convert the input optical signal into an optical signal of a specific wavelength as needed. In one embodiment of the present invention, the baseline conversion module 10 and the platform conversion module 30 may further include a wavelength division multiplexer; the wavelength division multiplexer is used to couple multiple optical signals into the same optical fiber and input the coupled optical signal to an optoelectronic slip ring; the wavelength division multiplexer is also used to recover multiple optical signals from the coupled optical signal output from the optoelectronic slip ring and input the recovered multiple optical signals into the digital optical module or the wavelength conversion module.

[0055] Figure 4 A schematic flowchart of a satellite rotating cabin signal transmission method based on an optoelectronic slip ring according to an embodiment of the present invention is shown. Figure 5 A schematic diagram of a single-channel satellite rotating cabin signal transmission method based on an optoelectronic slip ring according to an embodiment of the present invention is shown. Figure 6 A schematic diagram of a multi-channel satellite rotating capsule signal transmission method based on an optoelectronic slip ring, according to an embodiment of the present invention, is shown. (Combined with...) Figures 4-6 The present invention describes a satellite rotating cabin signal transmission method based on an optoelectronic slip ring, which includes the following steps:

[0056] First, the input digital optical module converts the input multiple digital signals into multiple optical signals, and the input wavelength conversion module converts the input optical signals into optical signals of the required wavelength. The multiple optical signals and the optical signals of the required wavelength are then input to an optical transmission wavelength division multiplexer. The baseline conversion module 10 is located in the satellite rotating cabin 1. In one embodiment of the invention, the input multiple signals include one or more of CAN signals, RS422 signals, or LVDS signals; the input optical signals include one or more of satellite rotating cabin optical signals or satellite platform cabin optical signals. As shown in the figure, the input optical signals are converted into optical signals corresponding to the required wavelength by the input wavelength conversion module 112, selecting the wavelength according to the requirements. For optical signals of different wavelengths, one or more wavelength division multiplexers can be used to convert different wavelength optical signals into one or more optical signals. CAN signals are converted into optical signals of different wavelengths by the CAN interface chip SJA1000 through software protocol conversion, using store-and-forward or real-time forwarding methods, and then converted into optical signals of different wavelengths by the first input digital optical module 113. LVDS signals are converted into optical signals of different wavelengths by the second input digital optical module 114 after level conversion. The RS422 signal is converted into optical signals of different wavelengths after level conversion by the third input digital optical module 115. As shown in the figure, the baseline conversion module 10 includes a first optical transmission wavelength division multiplexer 111, a second optical transmission wavelength division multiplexer 116, a third optical transmission wavelength division multiplexer 117, and a fourth optical transmission wavelength division multiplexer 118. In one embodiment of the present invention, the baseline conversion module 10 may include two or more wavelength division multiplexers.

[0057] Next, the optical transmit wavelength division multiplexer couples the input optical signal into the same optical fiber and inputs the coupled optical signal into the optoelectronic slip ring. In one embodiment of the present invention, the optoelectronic slip ring 20 includes a single-channel optoelectronic slip ring or a multi-channel optoelectronic slip ring.

[0058] Next, the optoelectronic slip ring transmits the optical signal to the optical receiving wavelength division multiplexer. As shown in the figure, the platform conversion module 30 includes a first optical receiving wavelength division multiplexer 311, a second optical receiving wavelength division multiplexer 316, a third optical receiving wavelength division multiplexer 317, and a fourth optical receiving wavelength division multiplexer 318. In one embodiment of the present invention, the baseline conversion module 30 may include two or more wavelength division multiplexers. The platform conversion module 30 is located in the satellite platform compartment 3.

[0059] Next, the optical receiving wavelength division multiplexer recovers the coupled optical signal output from the optoelectronic slip ring into multiple optical signals, and inputs the recovered multiple optical signals into the receiving digital optical module and the receiving wavelength conversion module. As shown in the figure, the baseline conversion module 30 includes a receiving wavelength conversion module 312, a first receiving digital optical module 313, a second receiving digital optical module 314, and a third receiving digital optical module 315.

[0060] Finally, the receiving digital optical module and the receiving wavelength conversion module convert the recovered multi-channel optical signals into digital signals or optical signals, and output the converted signals.

[0061] In one embodiment of the present invention, the transmission method uses a single-channel optoelectronic slip ring to convert multiple input signals into multiple optical signals for transmission; or the transmission method distributes input signals with the same function across different optoelectronic slip ring channels, using a multi-channel optoelectronic slip ring to convert them into multiple optical signals for transmission, avoiding functional loss in the event of a single optoelectronic slip ring failure, and improving application reliability. In one embodiment of the present invention, a wavelength division multiplexer may not be used; instead, one wavelength may correspond to one optical channel.

[0062] The satellite rotating cabin signal transmission system based on photoelectric slip rings provided by this invention uses photoelectric slip rings to modulate different signals to different optical wavelengths, realizing the transmission of various digital signals in a single or multi-channel manner. This is beneficial for the lightweighting and miniaturization of complex signal transmission in spaceborne systems. Optical signals can be coupled to one or more optical fibers through one or more wavelength division multiplexers. For important signals, multi-channel hot backup transmission can be used to achieve electrical signal conversion and optical channel transmission redundancy, which can meet the high reliability and high stability transmission requirements of aerospace.

[0063] Although various embodiments of the present invention have been described above, it should be understood that they are presented by way of example only and not as limitations. It will be apparent to those skilled in the art that various combinations, modifications, and alterations can be made without departing from the spirit and scope of the invention. Therefore, the breadth and scope of the invention disclosed herein should not be limited to the exemplary embodiments disclosed above, but should be defined only according to the technical solutions of the invention and their equivalents.

Claims

1. A satellite rotating cabin signal transmission system based on an optoelectronic slip ring, characterized in that, include: A baseline conversion module, located in the satellite rotating cabin, is used to convert digital signals and optical signals into coupled optical signals or to convert coupled optical signals into digital signals and optical signals. An optoelectronic slip ring is located in a turntable. The optoelectronic slip ring includes a smooth ring and an electrical slip ring. The optoelectronic slip ring is driven to rotate by the turntable. The optoelectronic slip ring is used for non-contact transmission of optical or electrical signals. as well as A platform conversion module, located in the satellite platform cabin, is used to convert digital signals and optical signals into coupled optical signals or to convert coupled optical signals into digital signals and optical signals. The smooth ring is connected in series with the electric slip ring; the smooth ring includes a smooth ring stator and a smooth ring rotor; the electric slip ring includes an electric slip ring stator and an electric slip ring rotor; The smooth ring rotor and the electric slip ring rotor are connected via a shift fork mechanism. The turntable stator is connected to both the smooth ring stator and the electric slip ring stator. The electric slip ring is driven to rotate by a primary shift fork mechanism, and the smooth ring is driven to rotate by a secondary shift fork mechanism. The smooth ring rotor is connected to the baseline conversion module, and the smooth ring stator is connected to the platform conversion module.

2. The satellite rotating cabin signal transmission system based on photoelectric slip ring according to claim 1, characterized in that, The digital signal includes one or more of CAN signal, RS422 signal, or LVDS signal; and / or The optical signal includes one or more of the satellite rotation module optical signal or the satellite platform module optical signal.

3. The satellite rotating cabin signal transmission system based on photoelectric slip ring according to claim 1, characterized in that, The baseline conversion module includes a digital optical module and / or a wavelength conversion module; and / or The platform conversion module includes a digital optical module and / or a wavelength conversion module.

4. The satellite rotating cabin signal transmission system based on photoelectric slip ring according to claim 3, characterized in that, The digital optical module includes an input digital optical module and a receiving digital optical module. The input digital optical module is used to convert digital signals into optical signals, and the receiving digital optical module is used to convert optical signals into digital signals; and / or The wavelength conversion module includes an input wavelength conversion module and a receiving wavelength conversion module, which are used to convert the input optical signal into an optical signal of a specific wavelength according to requirements.

5. The satellite rotating cabin signal transmission system based on photoelectric slip ring according to claim 3, characterized in that, The baseline conversion module and the platform conversion module also include a wavelength division multiplexer; The wavelength division multiplexer is used to couple multiple optical signals into the same optical fiber and input the coupled optical signals into the optoelectronic slip ring; the wavelength division multiplexer is also used to recover multiple optical signals from the coupled optical signals output by the optoelectronic slip ring and input the recovered multiple optical signals into the digital optical module or the wavelength conversion module.

6. A method for using the satellite rotating cabin signal transmission system based on an optoelectronic slip ring as described in any one of claims 1-5, characterized in that, Includes the following steps: The input digital optical module converts the input multiple digital signals into multiple optical signals, the input wavelength conversion module converts the input optical signals into optical signals of the required wavelength, and the multiple optical signals and the optical signals of the required wavelength are input into the optical transmission wavelength division multiplexer. The optical transmission wavelength division multiplexer couples the input optical signal into the same optical fiber and inputs the coupled optical signal into the photoelectric slip ring; The photoelectric slip ring transmits the optical signal to the optical receiving wavelength division multiplexer. The optical receiving wavelength division multiplexer restores the coupled optical signal output by the optoelectronic slip ring into multiple optical signals, and inputs the restored multiple optical signals into the receiving digital optical module and the receiving wavelength conversion module. as well as The receiving digital optical module and the receiving wavelength conversion module convert the recovered multi-channel optical signals into digital signals or optical signals, and output the converted signals.

7. The satellite rotating cabin signal transmission method based on photoelectric slip ring according to claim 6, characterized in that, The input multiplexed signal includes one or more of CAN signal, RS422 signal, or LVDS signal; and / or The input optical signal includes one or more of the satellite rotary cabin optical signal or the satellite platform cabin optical signal.

8. The satellite rotating cabin signal transmission method based on photoelectric slip ring according to claim 6, characterized in that, The photoelectric slip ring includes a single-channel photoelectric slip ring or a multi-channel photoelectric slip ring.

9. The satellite rotating cabin signal transmission method based on photoelectric slip ring according to claim 7, characterized in that, The RS422 signal or LVDS signal is converted into multiple optical signals by the input digital optical module; and The CAN signal is converted into an optical signal through a protocol conversion and then converted into an optical signal through the input digital optical module.

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