CN115378501A - Vehicle-mounted data transmission device and vehicle-mounted data transmission system - Google Patents
Vehicle-mounted data transmission device and vehicle-mounted data transmission system Download PDFInfo
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- CN115378501A CN115378501A CN202210332827.7A CN202210332827A CN115378501A CN 115378501 A CN115378501 A CN 115378501A CN 202210332827 A CN202210332827 A CN 202210332827A CN 115378501 A CN115378501 A CN 115378501A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/40—Transceivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/44—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
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Abstract
The invention relates to the field of vehicle-mounted transmission, in particular to a vehicle-mounted data transmission device and a vehicle-mounted data transmission system. The data transmission device comprises a base, a main control board, a light emitting module and a light receiving module, wherein the main control board, the light emitting module and the light receiving module are all arranged on the base, and the main control board is respectively connected with the light emitting module, the light receiving module and a vehicle-mounted data center. Compared with the prior art, the invention realizes free space optical transmission in atmospheric environment, realizes rapid data transmission and exchange of vehicle-mounted and ground data exchange stations, and greatly improves efficiency.
Description
Technical Field
The invention relates to the field of vehicle-mounted transmission, in particular to a vehicle-mounted data transmission device and a vehicle-mounted data transmission system.
Background
With the continuous development of artificial intelligence and automatic driving technologies, unmanned driving gradually enters people's lives, and a large amount of generated data needs to be uploaded and downloaded between a ground data center and equipment such as vehicles and unmanned aerial vehicles, such as point cloud data and vehicle condition information acquired by the vehicles in the driving process. The traditional method is to adopt an optical disc or a mobile hard disk to exchange data with a data center in a manual connection mode, and the uploading and downloading of data can take dozens of minutes or even hours due to a large amount of data, so that a free space high-speed transmission optical module is needed to solve the problem.
The manual connection mode of the optical disk or the mobile hard disk is adopted to exchange data, so that the time and the labor are wasted, the efficiency is low, and the development of automatic driving is seriously hindered. It is unacceptable that any station on the ground needs to be attended and that the efficiency of data exchange is extremely time consuming, as the number of autonomous vehicles increases and more data exchange stations must be built at greater cost.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a vehicle-mounted data transmission device and a vehicle-mounted data transmission system, aiming at the above-mentioned defects in the prior art, so as to solve the problems of slow and inconvenient vehicle-mounted data transmission.
The technical scheme adopted by the invention for solving the technical problems is as follows: the data transmission device comprises a base, a main control board, a light emitting module and a light receiving module, wherein the main control board, the light emitting module and the light receiving module are all arranged on the base, and the main control board is respectively connected with the light emitting module, the light receiving module and a vehicle-mounted data center; wherein,
the optical emission module comprises a laser chip and a first collimating lens, the optical receiving module comprises an optical detector and a second collimating lens, and a main optical axis of the first collimating lens and a main optical axis of the second collimating lens are arranged in parallel;
the main control board acquires data information of the data center and sends the data information to the laser chip in an electric signal mode, the data information is converted into an optical signal through the laser chip, the optical signal penetrates through the first collimating lens and then is collimated and sent outwards, and an external optical signal is collimated by the second collimating lens until reaching the optical detector and converted into an electric signal and sent to the main control board.
Wherein, the preferred scheme is: the base includes the base, the base includes that the mainboard places the position, has the first installation position of first through-hole and has the second installation position of second through-hole, the center pin parallel arrangement of first through-hole and second through-hole, the main control board sets up in the mainboard places the position, the light emission module sets up on first installation position and first collimating lens aligns the setting with first through-hole, the light receiving module sets up on the second installation position and second collimating lens aligns the setting with the second through-hole.
Wherein, the preferred scheme is: and a heat conduction gasket is arranged between the main control board and the mainboard placing position.
Wherein, the preferred scheme is: the main control board is provided with a laser chip driver, a main control chip and an AD (analog-to-digital) conversion chip, the main control chip is used as a control center of the main control board, the laser chip driver is respectively connected with the laser chip and the main control chip to provide driving electric signals for the laser chip, and the AD conversion chip is respectively connected with the optical detector and the main control board to convert the electric signals converted by the optical detector into digital signals and transmit the digital signals to the main control board; at least one of the laser chip driver, the main control chip and the AD analog-to-digital conversion chip is attached to or close to the heat conduction gasket.
Wherein, the preferred scheme is: the base still includes the upper cover, upper cover and base fixed connection and formation hold the mainboard and place the space of placing of position, light emission module and light receiving module, first through-hole and second through-hole set up on a side of base, the offside of base is provided with the opening that extends to the bottom to installation fiber connector.
Wherein, the preferred scheme is: the light emitting module and the light receiving module are welded with the gold fingers at the corresponding positions of the main control board through the bent flexible board.
Wherein, the preferred scheme is: the base is an SFP package housing.
Wherein, the preferred scheme is: the laser chip of the light emitting module emits 1550um optical signals, and the light receiving module is further provided with an optical amplifier connected with the optical detector to amplify the electrical signals generated by the optical detector.
Wherein, the preferred scheme is: the first collimating lens and the second collimating lens are filter lenses capable of filtering out non-signal light, and the non-signal light ranges from 1530 nm to 1570 nm.
The technical scheme adopted by the invention for solving the technical problems is as follows: the vehicle-mounted data transmission system comprises a data center, a data exchange station and a data transmission device, wherein the data center, the data exchange station and the data transmission device are arranged in a vehicle, the data transmission device is arranged on the vehicle and is in data connection with the data center, and data transmission is carried out between the data transmission device and the data exchange station through a light emitting module and a light receiving module.
Compared with the prior art, the invention realizes self-space optical transmission in the atmospheric environment, realizes rapid data transmission and exchange of vehicle-mounted and ground data exchange stations, and greatly improves the efficiency.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic structural diagram of an onboard data transmission system of the present invention;
FIG. 2 is a schematic structural diagram of a data transmission apparatus according to the present invention;
FIG. 3 is a schematic diagram of a first directional structure of a package structure of a data transmission device according to the present invention;
fig. 4 is a second directional structural diagram of the package structure of the data transmission device of the present invention.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the present invention provides a preferred embodiment of a data transmission device 200 of a vehicle 100.
A data transmission device 200 of a vehicle 100 realizes free space data transmission between the vehicle 100 and an external data exchange station 300, the data transmission device 200 includes a base 210, a main control board 220, a light emitting module 230 and a light receiving module 240, the main control board 220, the light emitting module 230 and the light receiving module 240 are all arranged on the base 210, the main control board 220 is respectively connected with the light emitting module 230, the light receiving module 240 and a data center of the vehicle 100; the light emitting module 230 includes a laser chip 231 and a first collimating lens 232, the light receiving module 240 includes a light detector 241 and a second collimating lens 242, and a main optical axis of the first collimating lens 232 and a main optical axis of the second collimating lens 242 are arranged in parallel; the main control board 220 obtains data information of the data center and sends the data information to the laser chip 231 in the form of an electric signal, the data information is converted into an optical signal through the laser chip 231, the optical signal passes through the first collimating lens 232 and then is collimated and emitted outwards, and an external optical signal is collimated to the optical detector 241 through the second collimating lens 242 and is converted into an electric signal and sent to the main control board 220.
Specifically, the base 210 is fixed at a corresponding position of the vehicle 100, and may extend outward through the vehicle 100, and may also be provided with a protective cover for protecting the base, where the protective cover may be an openable non-transparent cover or a non-openable transparent cover. The base 210 is provided with important components of the data transmission device 200, such as a control brain main control board 220 of the data transmission device 200, which receives all control processing functions of the data transmission device 200, for example, the data transmission device communicates with an external data exchange station 300 through a communication module, or after receiving a transmission instruction, converts data of the vehicle-mounted device 100 into an electrical signal and controls the light emitting module 230 to send the electrical signal outwards, so that the external data exchange station 300 receives the electrical signal, converts the electrical signal received by the light receiving module 240 into data in a corresponding format, stores the data or the instruction, and simultaneously monitors temperature, vcc voltage, bias current, power monitoring compensation, alarm and the like, and determines the working state of the module.
Of course, the core of the present invention is to protect the overall physical structure and circuit connection relationship of the data transmission device 200, especially the data interaction with the external data exchange station 300 that is installed on the vehicle-mounted device 100, while the control processing function of the main control board 220 is the conventional technology or belongs to the known technology in the optical transmission module, and the main control board 220 is described for the purpose of limiting other functional modules and the overall structure and for better description, and the related software functions are not required to be protected in this application.
Particularly, by the arrangement of the light emitting module 230 and the light receiving module 240, the efficient and stable data transmission of the vehicle 100 is realized, and the vehicle is particularly suitable for the existing electric vehicle with a very large data volume. In order to enable the light emitting module 230 to emit light signals at a longer distance and ensure the stability of the light signals, so that the vehicle-mounted device 100 can exchange data even when the distance between the vehicle-mounted device 100 and the external data exchange station 300 is far enough, a first collimating lens 232 and a second collimating lens 242 are provided, the emitting distance of the laser chip 231 is increased through the first collimating lens 232, and the scattering condition is reduced, for example, the divergence of light spots within a range of two meters or more is ensured to be less than 1 degree so as to ensure the signal intensity to be in a signal-to-noise ratio; the light is concentrated into the optical detector 241 through the second collimating lens 242, so that a small error rate and accurate and complete data are ensured, and free space optical information exchange under an atmospheric environment is realized.
Further, the first collimating lens 232 and the second collimating lens 242 are filter lenses capable of filtering out non-signal light, and the non-signal light is in a range of 1530-1570nm, so that interference of an external optical fiber is reduced.
In one embodiment, the laser chip 231 of the optical transmitter module transmits an optical signal of 1550um, and the optical receiver module is further provided with an optical amplifier connected to the optical detector 241 for amplifying the electrical signal generated by the optical detector 241. Adopt 1550 um's optical signal, on the one hand stable, on the other hand can not have the injury to human eyes, especially be used in on-vehicle 100, need externally launch, this is the point of paying attention to very much, is in human eyes and absorbs the water peak wave band, does not pierce through the crystalline lens and causes the neural damage of optic net, guarantees human eye safety. Through the amplification of the optical amplifier, the signal processing convenience is improved, and the overall transmission accuracy is improved.
In one embodiment, a vehicle-mounted 100 data transmission system is provided, the vehicle-mounted 100 data transmission system includes a data center disposed in the vehicle-mounted 100, a data exchange station 300 and a data transmission device 200, and the data transmission device 200 is disposed on the vehicle-mounted 100, is in data connection with the data center, and performs data transmission with the data exchange station 300 through an optical transmission module 230 and an optical reception module 240. Because of the extremely fast data exchange, the construction of ground data center exchange sites is not needed to be increased, thereby greatly saving the construction expenditure and generating greater economic benefit.
As shown in FIG. 2, the present invention provides a preferred embodiment of a base 210.
The base 210 comprises a base 211, the base 211 comprises a main board placing position, a first installing position 251 with a first through hole and a second installing position 252 with a second through hole, the central axes of the first through hole and the second through hole are arranged in parallel, the main control board 220 is arranged in the main board placing position, the light emitting module 230 is arranged on the first installing position 251, the first collimating lens 232 is arranged in alignment with the first through hole, the light receiving module 240 is arranged on the second installing position 252, and the second collimating lens 242 is arranged in alignment with the second through hole.
Specifically, the main board placing position is preferably a plane, which is convenient for stable installation of the main control board 220, and meanwhile, the first installation position 251 and the second installation position 252 are provided with groove shapes matched with the outer contours of the corresponding light emitting module 230 or the corresponding light receiving module 240, and can be fixed by fixing members or glue. Preferably, the first mounting portion 251 is a U-shaped channel, the housing of the light emitting module 230 has a cylindrical shape, the second mounting portion 252 is a pad or a square channel, and the housing of the light receiving module 240 has a square shape.
The first mounting portion 251 and the second mounting portion 252 are integrally designed, and an upper cover 253 is further disposed to fix the light receiving module 240 and the light emitting module 230.
In one embodiment, a heat conducting gasket is disposed between the main control board 220 and the main board placing position. The heat conducting gasket is used for filling an air gap between the main control board 220 and the base 210, and can also be used as an adhesive structure between the main control board 220 and the base 210, the main control board 220 can be directly and fixedly connected with the shell, the heat conducting gasket can be used for covering a very uneven surface due to the flexibility and the elastic characteristics, the heat conducting gasket is particularly suitable for the shape of the main control board 220, the heat of the main control board 220 is diffused out of the base 210, and the base 210 is made of a heat dissipation material such as metal preferably, so that the efficiency and the service life of the heating electronic component can be improved.
In one embodiment, a laser chip 231 driver, a main control chip, and an AD analog-to-digital conversion chip are disposed on the main control board 220, the main control chip serves as a control center of the main control board 220, the laser chip 231 driver is connected to the laser chip 231 and the main control chip respectively to provide driving electrical signals for the laser chip 231, and the AD analog-to-digital conversion chip is connected to the optical detector 241 and the main control board 220 respectively to convert the electrical signals converted by the optical detector 241 into digital signals and transmit the digital signals to the main control board 220; at least one of the laser chip 231 driver, the main control chip and the AD analog-to-digital conversion chip is attached to or disposed close to the thermal pad, so as to quickly dissipate heat from the main heat source on the main control board 220.
Specifically, the laser chip 231 driver is a driving circuit for the laser chip 231, and is a conventional technology, regardless of which of the main control chip, the laser chip 231 and the laser chip 231 driver is disposed in the data transmission device 200, so as to improve the performance of the data transmission device 200. The AD/d conversion chip supports the AD/d conversion function, reduces the processing of the main control chip, reduces the hardware requirement on the main control chip, and makes the main control chip focus on the overall control of the data transmission device 200.
In one embodiment, the base 210 further includes an upper cover 212, the upper cover 212 is fixedly connected to the base 211 and forms a placing space for accommodating the motherboard placing location, the light emitting module 230 and the light receiving module 240, the first through hole and the second through hole are disposed on one side of the base 211, and an opening extending toward the bottom is disposed on the opposite side of the base 211 for installing an optical fiber connector. Preferably, the base 210 is an SFP package, and GBIC (short for Gigabit Interface Converter) is an Interface device for converting Gigabit electrical signals into optical signals. The GBIC design can be used for hot plug. GBIC is an interchangeable product that conforms to international standards. The gigabit switch adopting the GBIC interface design has a large market share in the market due to the flexibility of interchange. An SFP (Small Form-factor plug) can be easily understood as an upgraded version of a GBIC, the SFP package housing being the package shell of the SFP, which provides assembly space and a mechanical interface.
In one embodiment, the light emitting module 230 and the light receiving module 240 are both welded to the main control board 220 by a gold finger at a corresponding position of the flexible board 260. The flexible board connected to the light emitting module 230 and the light receiving module 240 after the collimation is completed is pre-bent and formed, and then is welded to the gold fingers of the main control board 220, so that the gold fingers on the two sides are accurately aligned, the impedance of the gold fingers is ensured to be 50+/-10% omega, and the electric signal is ensured to be less lost and reflected.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover all equivalent variations and modifications within the scope of the present invention as defined by the appended claims.
Claims (10)
1. The utility model provides a free space data transmission of on-vehicle and external data exchange website, its characterized in that of a vehicular data transmission device, realizes on-vehicle and external data exchange website: the data transmission device comprises a base, a main control board, a light emitting module and a light receiving module, wherein the main control board, the light emitting module and the light receiving module are all arranged on the base, and the main control board is respectively connected with the light emitting module, the light receiving module and a vehicle-mounted data center; wherein,
the light emitting module comprises a laser chip and a first collimating lens, the light receiving module comprises a light detector and a second collimating lens, and a main optical axis of the first collimating lens and a main optical axis of the second collimating lens are arranged in parallel;
the main control board acquires data information of the data center and sends the data information to the laser chip in an electric signal mode, the data information is converted into an optical signal through the laser chip, the optical signal penetrates through the first collimating lens and then is collimated and emitted outwards, and an external optical signal is collimated by the second collimating lens until reaching the optical detector and is converted into an electric signal and sent to the main control board.
2. The vehicle-mounted data transmission device according to claim 1, characterized in that: the base includes the base, the base includes that the mainboard is placed the position, is had the first installation position of first through-hole and is had the second installation position of second through-hole, the center pin parallel arrangement of first through-hole and second through-hole, the main control board sets up in the mainboard is placed the position, the light emission module sets up on first installation position and first collimating lens aligns the setting with first through-hole, the light receiving module sets up on the second installation position and second collimating lens aligns the setting with the second through-hole.
3. The vehicle-mounted data transmission device according to claim 2, characterized in that: and a heat conduction gasket is arranged between the main control board and the mainboard placing position.
4. The vehicle-mounted data transmission device according to claim 3, wherein: the main control board is provided with a laser chip driver, a main control chip and an AD (analog-to-digital) conversion chip, the main control chip is used as a control center of the main control board, the laser chip driver is respectively connected with the laser chip and the main control chip to provide driving electric signals for the laser chip, and the AD conversion chip is respectively connected with the optical detector and the main control board to convert the electric signals converted by the optical detector into digital signals and transmit the digital signals to the main control board; at least one of the laser chip driver, the main control chip and the AD analog-to-digital conversion chip is attached to or close to the heat conducting gasket.
5. The vehicle-mounted data transmission device according to claim 2, characterized in that: the base still includes the upper cover, upper cover and base fixed connection and formation hold the mainboard and place the space of placing of position, optical emission module and optical reception module, first through-hole and second through-hole set up on a side of base, the offside of base is provided with the opening that extends to the bottom to installation optical fiber connector.
6. The vehicle-mounted data transmission device according to claim 2, characterized in that: the light emitting module and the light receiving module are welded with the gold fingers at the corresponding positions of the main control board through the bent flexible board.
7. The vehicle-mounted data transmission device according to claim 2, characterized in that: the base is an SFP package housing.
8. The vehicle-mounted data transmission device according to claim 1, characterized in that: the laser chip of the light emitting module emits 1550um optical signals, and the light receiving module is further provided with an optical amplifier connected with the optical detector to amplify the electrical signals generated by the optical detector.
9. The vehicle-mounted data transmission device according to claim 1, characterized in that: the first collimating lens and the second collimating lens are filter lenses capable of filtering out non-signal light, and the non-signal light ranges from 1530 nm to 1570 nm.
10. A vehicle-mounted data transmission system characterized by: the vehicle-mounted data transmission system comprises a data center arranged in a vehicle, a data exchange station and the data transmission device according to any one of claims 1 to 10, wherein the data transmission device is arranged on the vehicle, is in data connection with the data center and is in data transmission with the data exchange station through an optical transmission module and an optical receiving module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210332827.7A CN115378501A (en) | 2022-03-31 | 2022-03-31 | Vehicle-mounted data transmission device and vehicle-mounted data transmission system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210332827.7A CN115378501A (en) | 2022-03-31 | 2022-03-31 | Vehicle-mounted data transmission device and vehicle-mounted data transmission system |
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| CN115378501A true CN115378501A (en) | 2022-11-22 |
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