A dual-channel redundant CANFD wireless optical transmission system

Abstract

A dual-channel redundant CANFD wireless optical transmission system includes a dual-channel redundant CANFD bus, and multiple CANFD bus devices are connected to the dual-channel redundant CANFD bus; the dual-channel redundant CANFD bus includes at least two parts, and in two adjacent parts of the dual-channel redundant CANFD bus, one part of the dual-channel redundant CANFD bus is connected to a wireless optical transmitting module, and the other part of the dual-channel redundant CANFD bus is connected to a wireless optical receiving module, the wireless optical transmitting module converts the dual-channel redundant CANFD electrical signal into a dual-channel redundant wireless optical signal and transmits it, and the corresponding wireless optical receiving module receives the dual-channel redundant wireless optical signal and converts it into a dual-channel redundant CANFD electrical signal. The information transmission between various devices through the dual-channel redundant CANFD bus can achieve higher transmission rate and longer payload; the device that needs to be separated, such as a rocket, is wirelessly transmitted between rocket stages through a wireless optical transmitting module and a wireless optical receiving module, which makes it easy to install and separate the rocket stages.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless optical transmission, and in particular to a dual-path redundant CANFD wireless optical transmission system. Background Art

[0002] With the maturity and development of information technology, the degree of digital informationization in military fields such as aviation, aerospace, vehicles, rockets, and missiles has been continuously strengthened. The transmission rate of the CAN bus has approached its bandwidth limit. CAN FD (Flexible Date Rate) is compatible with CAN bus devices, which can achieve higher transmission rates and longer payloads. The traditional CAN bus rate can only reach 1Mb / s, with 8 bytes of data per frame, while the CANFD rate can reach 10Mb / s, and each frame can include 64 bytes of data. At present, the communication between rocket stages or between the compartments in the missile is wired interconnection. During assembly, the cables between rocket stages or between the compartments in the missile will be squeezed and bent, and it is not conducive to the separation of rocket stages and compartments in the missile. Based on the advantages of CANFD high rate and wireless optical fiber transmission bandwidth, large capacity, good confidentiality, and good electrical isolation, the present invention designs a dual-channel redundant CANFD wireless optical transmission system product, which can realize dual-channel redundant CANFD wireless optical transmission between 0-100mm spacing. Summary of the invention

[0003] In order to solve the above-mentioned technical problems of slow CAN bus transmission rate and inability to transmit wirelessly, the present invention provides a dual-path redundant CANFD wireless optical transmission system.

[0004] The purpose of the present invention is to be achieved by adopting the following technical solutions. A dual-channel redundant CANFD wireless optical transmission system proposed in the present invention includes a dual-channel redundant CANFD bus, and multiple CANFD bus devices are connected to the dual-channel redundant CANFD bus; the dual-channel redundant CANFD bus includes at least two parts, and in two adjacent dual-channel redundant CANFD buses, one part of the dual-channel redundant CANFD bus is connected to a wireless optical transmitting module, and the other part of the dual-channel redundant CANFD bus is connected to a wireless optical receiving module. The wireless optical transmitting module converts the dual-channel redundant CANFD electrical signal in the dual-channel redundant CANFD bus connected to it into a dual-channel redundant wireless optical signal and transmits it, and the corresponding The wireless optical receiving module receives the dual-path redundant wireless optical signal and converts it into a dual-path redundant CANFD electrical signal and transmits it through the dual-path redundant CANFD bus of the part where it is located; while the wireless optical receiving module receives the dual-path redundant wireless optical signal emitted by the wireless optical transmitting module, the dual-path redundant CANFD electrical signal in the dual-path redundant CANFD bus connected to it is converted into a dual-path redundant optical signal and transmitted, and the corresponding wireless optical transmitting module receives the dual-path redundant optical signal and converts it into a dual-path redundant CANFD electrical signal, thereby realizing the bidirectional conversion and transmission of the dual-path redundant CANFD electrical signal and the dual-path redundant optical signal in the dual-path redundant CANFD bus.

[0005] Furthermore, the dual-channel redundant CANFD bus is connected to a CANFD detection tool.

[0006] Furthermore, the wireless optical transmitting module is connected to the dual-channel redundant CANFD bus of the corresponding part through the transmitting module electrical interface thereon.

[0007] Furthermore, the wireless optical transmitting module is provided with a transmitting optical port I and a transmitting optical port II, and the transmitting optical port I and the transmitting optical port II are mutually redundant backups and are used for transmitting and receiving dual-path redundant wireless optical signals.

[0008] Furthermore, the wireless optical receiving module is connected to the dual-channel redundant CANFD bus of the corresponding part through the receiving module electrical interface thereon.

[0009] Furthermore, the wireless optical receiving module is provided with a receiving optical port I and a receiving optical port II, and the receiving optical port I and the receiving optical port II serve as redundant backup for each other and are used for transmitting and receiving dual-path redundant wireless optical signals.

[0010] Furthermore, the wireless optical transmission module includes a CANFD transceiver, a CANFD controller, an FPGA, a limiting amplifier, a laser driver, an optical device and a lens. The CANFD transceiver converts the dual-channel redundant CANFD electrical signal in the corresponding part of the dual-channel redundant CANFD bus into a corresponding single-ended signal. The FPGA controls the CANFD controller to convert the single-ended signal into corresponding parallel data, and performs encoding processing, and then outputs a high-speed serial data signal through the GTX channel in the FPGA. The laser driver controls the bias current and modulation current output according to the high-speed serial data signal, and outputs a dual-channel redundant wireless optical signal. The light spot of the dual-channel redundant wireless optical signal is diffused by the optical device and collimated by the lens for wireless optical transmission.

[0011] Furthermore, the wireless optical receiving module includes a CANFD transceiver, a CANFD controller, an FPGA, a limiting amplifier, a laser driver, an optical device and a lens. The optical device includes a detector. The dual-path redundant wireless optical signal received by the module is converged onto the corresponding detector through the lens. The limiting amplifier monitors the electrical signal on the detector and converts it into a high-speed serial data signal. The high-speed serial data signal passes through the GTX channel of the FPGA and is decoded and restored to parallel data. The FPGA controls the CANFD controller to restore the parallel data to a single-ended signal. The single-ended signal is converted into a dual-path redundant CANFD electrical signal through the CANFD transceiver and output to the corresponding part of the dual-path redundant CANFD bus.

[0012] Furthermore, the laser driver is a FP laser or a DFB laser.

[0013] Furthermore, the distance between the sending position of the dual-path redundant wireless optical signal in the wireless optical transmitting module and the receiving position of the dual-path redundant wireless optical signal in the wireless optical receiving module is 0-100 mm.

[0014] Compared with the existing technology, the advantages of this invention are as follows: information transmission between various devices is carried out through a dual-channel redundant CANFD bus, which can achieve higher transmission rate and longer payload; devices that need to be separated, such as rockets, can perform wireless transmission between rocket stages through wireless optical transmission modules and wireless optical receiving modules, which makes it easy to install and separate the rocket stages.

[0015] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1A block diagram of an embodiment of a dual-path redundant CANFD wireless optical transmission system of the present invention;

[0017] Figure 2a for Figure 1 A top view of the wireless optical transmission module;

[0018] Figure 2b for Figure 2a A front view of

[0019] Figure 2c for Figure 2a Right view of;

[0020] Figure 2d for Figure 2a Left view of

[0021] Figure 3a for Figure 1 A top view of the wireless optical receiving module;

[0022] Figure 3b for Figure 3a A front view of

[0023] Figure 3c for Figure 3a Right view of;

[0024] Figure 3d for Figure 3a Left view of

[0025] Figure 4 for Figure 1 Block diagram of the wireless optical transmitting module and the wireless optical receiving module.

[0026] [Reference Signs]

[0027] A1, A2-level CANFD bus equipment, B1, B2-level CANFD bus equipment, C1, C2-level CANFD bus equipment, 1-wireless optical transmitting module, 101-transmitting optical port I, 102-transmitting optical port II, 103-transmitting module electrical interface, 2-wireless optical receiving module, 201-receiving optical port I, 202-receiving optical port II, 203-receiving module electrical interface, 3-CANFD detection tool. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] An embodiment of a dual-path redundant CANFD wireless optical transmission system of the present invention is as follows: Figures 1 to 4 As shown, the signal transmission between rocket stages is used as an example for explanation. The rocket is divided into three stages, namely, rocket stage one, rocket stage two, and rocket stage three. The three-stage rocket transmits signals through a dual-way redundant CANFD bus. The dual-way redundant CANFD bus corresponds to the number of rocket stages and is divided into three parts. The dual-way redundant CANFD bus of two adjacent parts transmits wireless optical signals through a wireless optical transmitter module 1 and a wireless optical receiver module 2 set on the dual-way redundant CANFD bus of the corresponding part. The dual-way redundant CANFD bus sets two signal transmission lines, which can be redundant backups for each other, used to convert and transmit dual-way redundant CANFD electrical signals and dual-way redundant wireless optical signals. The dual-way redundant CANFD bus is connected to a CANFD detection tool 3 for detecting data transmitted in the dual-way redundant CANFD bus. A first-level CANFD bus device A1 and a first-level CANFD bus device A2 are set in the first stage of the rocket, a second-level CANFD bus device B1 and a second-level CANFD bus device B2 are set in the second stage of the rocket, and a third-level CANFD bus device C1 and a third-level CANFD bus device C2 are set in the third stage of the rocket.

[0030] In the first stage of the rocket, a wireless optical transmitting module 1 connected to a dual-way redundant CANFD bus is provided, and the first-level CANFD bus device A1 and the first-level CANFD bus device A2 are connected to the dual-way redundant CANFD bus. In the second stage of the rocket, a wireless optical receiving module 2 corresponding to the wireless optical transmitting module 1 in the first stage of the rocket is provided, and the wireless optical receiving module 2 is connected to the dual-way redundant CANFD bus. At the same time, the second-level CANFD bus device B1 and the second-level CANFD bus device B2 are connected to the dual-way redundant CANFD bus. A wireless optical transmitting module 1 is also provided in the second stage of the rocket, and the wireless optical transmitting module 1 is connected to the dual-way redundant CANFD bus. In the third stage of the rocket, a wireless optical receiving module 2 corresponding to the wireless optical transmitting module 1 in the second stage of the rocket is provided, and the wireless optical receiving module 2 is connected to the dual-way redundant CANFD bus. The third-level CANFD bus device C1 and the third-level CANFD bus device C2 are connected to the dual-way redundant CANFD bus.

[0031] Wireless optical signal transmission is performed between the dual-channel redundant CANFD buses in the first and second stages of the rocket through wireless optical transmitter modules and wireless optical receiver modules, and wireless optical signal transmission is also performed between the dual-channel redundant CANFD buses in the second and third stages of the rocket through wireless optical transmitter modules and wireless optical receiver modules. Therefore, wireless optical transmitter module 1 and wireless optical receiver module 2 always appear in pairs and are used in pairs to complete the electro-optical / photoelectric conversion and wireless optical signal transmission of signals in the dual-channel redundant CANFD buses between rocket stages.

[0032] The first-level CANFD bus device A1 and the first-level CANFD bus device A2 in the first stage of the rocket are interconnected with the transmitting module electrical interface 103 (CANFD1 / 2) of the wireless optical transmitting module 1 in the first stage of the rocket to form a network. The dual-path redundant CANFD electrical signal in the dual-path redundant CANFD bus is converted into a dual-path redundant wireless optical signal through the wireless optical transmitting module 1, and is output through the transmitting optical port I101 and the transmitting optical port II102 on the wireless optical transmitting module 1. The transmitting optical port I101 and the transmitting optical port II102 are redundant backups for each other. When the wireless optical transmitting module 1 converts the dual-path redundant CANFD electrical signal into a dual-path redundant wireless optical signal and outputs it, the transmitting optical port I101 and the transmitting optical port II102 can also simultaneously receive the corresponding dual-path redundant wireless optical signal, and then convert it into a dual-path redundant CANFD electrical signal through the wireless optical transmitting module 1; the receiving optical port I201 and the receiving optical port II202 of the wireless optical receiving module 2 in the second stage of the rocket are respectively connected to the transmitting optical port I101 and the transmitting optical port II102 of the wireless optical transmitting module 1 in the first stage of the rocket. Optical port II102 corresponds one to one. After the receiving optical port I201 and receiving optical port II202 of the wireless optical receiving module 2 in the second stage of the rocket receive the corresponding redundant wireless optical signal, the wireless optical receiving module 2 converts the dual-path redundant wireless optical signal into a dual-path redundant CANFD electrical signal, and inputs it into the dual-path redundant CANFD bus in the second stage of the rocket through the receiving module electrical interface 203 (CANFD1 / 2) in the wireless optical receiving module 2. While the wireless optical receiving module 2 receives the dual-path redundant optical signal and converts it into a dual-path redundant CANFD electrical signal, the wireless optical receiving module 2 can also convert the dual-path redundant CANFD electrical signal in the dual-path redundant CANFD bus into a dual-path redundant wireless optical signal and transmit it from the corresponding receiving optical port I201 and receiving optical port II202. The receiving module electrical interface 203 of the wireless optical receiving module 2 is also interconnected and networked with the secondary CANFD bus device B1 and the secondary CANFD bus device B2 in the second stage of the rocket to complete the wireless optical networking of the CANFD bus devices between the first stage of the rocket and the second stage of the rocket. The second and third stages of the rocket are networked in the same way as the first and second stages, ultimately achieving wireless optical networking of CANFD bus devices between the first, second, and third stages of the rocket.

[0033] The conversion process of the signal in the redundant CANFD bus in the wireless optical transmitting module 1 and the wireless optical receiving module 2 is as follows: the wireless optical transmitting module 1 and the wireless optical receiving module 2 in the dual-channel redundant CANFD bus both include a CANFD transceiver, a CANFD controller, an FPGA (Field Programmable Gate Array), a limiting amplifier, a laser driver, an optical device and a lens; in the wireless optical transmitting module 1, the process of converting the dual-channel redundant CANFD electrical signal into a dual-channel redundant wireless optical signal is as follows: the CANFD transceiver receives the dual-channel redundant CANFD electrical signal input from the transmitting module electrical interface 103, and converts it into a corresponding single-ended signal; the FPGA controls the CANFD controller to convert the single-ended signal into corresponding parallel data, and performs encoding processing, and outputs a high-speed serial data signal through the GTX channel, and the GTX channel includes GTX1 and GTX2, which respectively output dual-channel corresponding high-speed serial data signals; the laser driver controls the bias current and modulation current output according to the high-speed serial data signal, and outputs an optical signal, and the laser driver can be an FP laser or a DFB laser; the spot of the optical signal is diffused and collimated by the lens for wireless optical transmission. In the wireless optical receiving module 2, the process of converting the dual-path redundant wireless optical signal into the dual-path redundant CANFD electrical signal: the dual-path redundant wireless optical signal emitted by the wireless optical transmitting module 1 is transmitted at any distance between 0-100mm, the optical device includes a detector, the dual-path redundant wireless optical signal is converged on the corresponding detector through a lens, the corresponding limiting amplifier monitors the electrical signal on the detector and converts it into a high-speed serial data signal; the high-speed serial data signal passes through the GTX channel of the FPGA and is decoded and restored to parallel data. Since there are two-path parallel data, the GTX channel includes GTX1 and GTX2, which respectively decode the corresponding high-speed serial data signals, the FPGA controls the CANFD controller, restores the parallel data to a single-ended signal, converts it into a CANFD electrical signal through the CANFD transceiver, and outputs it from the receiving module electrical interface 203 in the wireless optical receiving module 2. The wireless optical transmitting module 1 and the wireless optical receiving module 2 have the same structure, and the paired wireless optical transmitting module 1 and the wireless optical receiving module 2 can simultaneously perform signal conversion and transmission in opposite directions.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A dual-channel redundant CANFD wireless optical transmission system, characterized in that: Including dual-channel redundant CANFD bus, multiple CANFD bus devices are connected to the dual-channel redundant CANFD bus; The dual-channel redundant CANFD bus includes at least two parts. In the two adjacent dual-channel redundant CANFD buses, one part of the dual-channel redundant CANFD bus is connected to a wireless optical transmitting module, and the other part of the dual-channel redundant CANFD bus is connected to a wireless optical receiving module. The wireless optical transmitting module converts the dual-channel redundant CANFD electrical signal in the dual-channel redundant CANFD bus connected to it into a dual-channel redundant wireless optical signal and transmits it. The corresponding wireless optical receiving module receives the dual-channel redundant wireless optical signal and then converts it into a dual-channel redundant CANFD electrical signal and transmits it through the dual-channel redundant CANFD bus of the part where it is located; while the wireless optical receiving module receives the dual-channel redundant wireless optical signal emitted by the wireless optical transmitting module, the dual-channel redundant CANFD electrical signal in the dual-channel redundant CANFD bus connected to it is converted into a dual-channel redundant optical signal and transmitted. The corresponding wireless optical transmitting module receives the dual-channel redundant optical signal and converts it into a dual-channel redundant CANFD telecommunication signal. signal, thereby realizing bidirectional conversion and transmission of dual-channel redundant CANFD electrical signals and dual-channel redundant optical signals in the dual-channel redundant CANFD bus; the wireless optical transmitting module and the wireless optical receiving module both include a CANFD transceiver that converts the dual-channel redundant CANFD electrical signal into a single-ended signal or converts the single-ended signal into a dual-channel redundant CANFD electrical signal, a CANFD controller that converts the single-ended signal into parallel data or converts the parallel data into a single-ended signal, an FPGA that encodes and processes the parallel data and converts it into a high-speed serial data signal or decodes the high-speed serial data signal and restores it to parallel data, a limiting amplifier that converts the electrical signal after the optical signal is converted into a high-speed serial data signal, a laser driver that converts the high-speed serial data signal into a dual-channel redundant wireless optical signal, an optical device that diffuses the light spot of the dual-channel redundant wireless optical signal, and a lens that collimates the light spot, and the optical device includes a detector for receiving the dual-channel redundant wireless optical signal and converting the optical signal into an electrical signal.

2. A dual-path redundant CANFD wireless optical transmission system according to claim 1, characterized in that: The dual-channel redundant CANFD bus is connected to a CANFD detection tool.

3. A dual-path redundant CANFD wireless optical transmission system according to claim 1, characterized in that: The wireless optical transmitting module is connected to the dual-channel redundant CANFD bus of the corresponding part through the transmitting module electrical interface thereon.

4. A dual-path redundant CANFD wireless optical transmission system according to claim 1, characterized in that: The wireless optical transmission module is provided with a transmission optical port I and a transmission optical port II, which are mutually redundant backups and are used for simultaneously transmitting and receiving dual-path redundant wireless optical signals.

5. A dual-path redundant CANFD wireless optical transmission system according to claim 1, characterized in that: The wireless optical receiving module is connected to the dual-channel redundant CANFD bus of the corresponding part through the receiving module electrical interface thereon.

6. A dual-path redundant CANFD wireless optical transmission system according to claim 1, characterized in that: The wireless optical receiving module is provided with a receiving optical port I and a receiving optical port II, which are mutually redundant backups and are used for simultaneously transmitting and receiving dual-path redundant wireless optical signals.

7. A dual-path redundant CANFD wireless optical transmission system according to claim 1, characterized in that: When the wireless optical transmitter module sends an optical signal, the CANFD transceiver converts the dual-channel redundant CANFD electrical signal in the corresponding part of the dual-channel redundant CANFD bus into a corresponding single-ended signal. The FPGA controls the CANFD controller to convert the single-ended signal into corresponding parallel data and encodes it. Then, the high-speed serial data signal is output through the GTX channel in the FPGA. The laser driver controls the bias current and modulation current output according to the high-speed serial data signal, and outputs a dual-channel redundant wireless optical signal. The light spot of the dual-channel redundant wireless optical signal is diffused by the optical device and collimated by the lens for wireless optical transmission.

8. The dual-path redundant CANFD wireless optical transmission system according to claim 1, characterized in that: When the wireless optical receiving module receives the optical signal, the dual-channel redundant wireless optical signal received by the module is converged onto the corresponding detector through the lens. The limiting amplifier monitors the electrical signal on the detector and converts it into a high-speed serial data signal. The high-speed serial data signal passes through the GTX channel of the FPGA and is decoded and restored to parallel data. The FPGA controls the CANFD controller to restore the parallel data to a single-ended signal. The single-ended signal is converted into a dual-channel redundant CANFD electrical signal through the CANFD transceiver and output to the corresponding part of the dual-channel redundant CANFD bus.

9. A dual-path redundant CANFD wireless optical transmission system according to claim 7 or 8, characterized in that: The laser driver is a FP laser or a DFB laser.

10. A dual-path redundant CANFD wireless optical transmission system according to claim 1, characterized in that: The distance between the sending position of the dual-path redundant wireless optical signal in the wireless optical transmitting module and the receiving position of the dual-path redundant wireless optical signal in the wireless optical receiving module is 0-100 mm.

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