CN218601846U - Airborne optical fiber video shunting equipment - Google Patents
Airborne optical fiber video shunting equipment Download PDFInfo
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- CN218601846U CN218601846U CN202222616319.XU CN202222616319U CN218601846U CN 218601846 U CN218601846 U CN 218601846U CN 202222616319 U CN202222616319 U CN 202222616319U CN 218601846 U CN218601846 U CN 218601846U
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Abstract
The utility model relates to an avionics tests technical field, concretely relates to machine carries optic fibre video shunting equipment. The utility model discloses technical scheme includes photoelectricity-photoelectric conversion module, digit crosspoint switch module, MCU control module, level conversion module, power conversion module and pilot lamp. The photoelectric-photoelectric conversion module receives an optical signal, converts the optical signal into a high-speed alternating current CML signal through photoelectric conversion, performs electric signal one-to-one distribution processing through the digital cross point switch module, outputs the high-speed alternating current CML signal, and sends the high-speed alternating current CML signal back to the photoelectric-photoelectric conversion module to output the optical signal through photoelectric conversion: 1 path of the separated signals is restored for the original machine to use, and the signal link on the machine is ensured to work completely and normally; in addition, the other 1 path of the video is output independently and is used for the video acquisition recorder to acquire and record the working condition and the onboard operation condition of the airplane in the flying process in real time. The problems of extraction and transmission of airborne multi-channel optical fiber video signals are successfully solved, and high-quality acquisition of the optical fiber video signals is realized.
Description
Technical Field
The utility model relates to an avionics tests technical field, concretely relates to machine carries optic fibre video shunting equipment.
Background
In a flight test, the traditional airborne equipment mainly transmits data through electric signals, and a large amount of wiring work is needed for acquisition and transmission of multiple paths of signals on an aviation aircraft, so that much inconvenience is brought to testing and refitting work. Moreover, signals of different standards need cables of different specifications, and the cables have low data transmission rate, large occupied space and mass, and complex wiring, and are difficult to adapt to the use requirements of high-speed signals.
Therefore, the development trend of signal transmission from electric signals to optical fiber signal transmission on a novel aviation aircraft is accelerated, and the optical fiber plays an important role in airborne optical fiber transmission by virtue of the advantages of large transmission information capacity, wide frequency band, low loss, strong anti-interference performance, good confidentiality, light weight, small size, long transmission distance and the like. In order to solve the problems of extraction and transmission of airborne multi-channel video signals and combine the requirements of flight test testing tasks, an airborne optical fiber video shunting device is specially developed.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an airborne optical fiber video shunting device for solving the problems of optical fiber video signal extraction and transmission on the existing machine, which performs 1-to-2 processing after extracting the multi-path optical fiber video signal on the machine, wherein 1 path is divided and returned to the original machine for use, thereby ensuring the complete and normal operation of the signal link on the machine; in addition, the other 1 path of the video is output independently and is used for the video acquisition recorder to acquire and record the working condition and the onboard operation condition of the airplane in the flying process in real time.
For solving the problems existing in the prior art, the technical scheme of the utility model is that: an airborne fiber optic video splitting device, comprising: the photoelectric-photoelectric conversion circuit comprises a photoelectric-photoelectric conversion module, a digital cross point switch module, an MCU control module, a level conversion module, a power conversion module and an indicator light;
the photoelectric-electro-optical conversion module adopts an optical transceiving integrated module to perform optical-electrical processing on 4 paths of optical signals and then convert the optical signals into high-speed alternating current CML signals, the high-speed alternating current CML signals are input into a digital cross point switch module, the digital cross point switch module performs 1-to-2 distribution on the 4 paths of input optical signals and then outputs 8 paths of high-speed alternating current CML signals to the photoelectric-electro-optical conversion module, and the level conversion module is connected between an MCU (microprogrammed control Unit) control module and the digital cross point switch module through an I2C bus and controls the level conversion of 3.3V and 1.8V on the I2C bus.
Further, the digital cross-point switch module employs a 12 × 12 asynchronous digital cross-point switch chip.
Furthermore, the power supply conversion module supplies power for the photoelectric-to-electric light conversion module, the digital cross point switch module, the MCU control module, the level conversion module and the indicator light.
Further, the indicator light is a 5V power indicator light and is used for displaying the power supply state of the equipment.
Further, the data rate of each port of the digital cross-point switch module is 11.3Gbps.
Furthermore, the MCU control module adopts an STM32F207VGT6 singlechip, and the working frequency is 120MHz singlechip.
Further, the optical transceiver module is an HTG8518-MD-TD01YY optical transceiver module.
Compared with the prior art, the utility model has the advantages as follows:
1) The utility model discloses can support 4 way light signal input, 8 way light signal output, functional performance is far above domestic and foreign equipment of the same type.
2) The utility model discloses equipment volume, size, consumption are far less than signal of telecommunication branching unit equipment of the same type, the installation of being convenient for.
3) The utility model discloses support optical signal speed and highest reach 10.3125Gbps, downward compatibility satisfies various types of optical signal transmission on the machine.
4) The utility model discloses a high quality acquisition of optic fibre video signal has improved the task reliability of equipment.
Drawings
Fig. 1 is a schematic block diagram of an onboard optical fiber video shunting device according to the present invention;
fig. 2 is an optical branching functional block diagram of an onboard optical fiber video branching device according to the present invention;
fig. 3 is a circuit diagram of a digital cross point switch module according to the present invention;
FIG. 4 is a circuit diagram of the MCU control module of the present invention;
fig. 5 is a circuit diagram of the level shift module of the present invention;
fig. 6 is a schematic block diagram of power conversion of an onboard fiber optic video splitter apparatus according to the present invention;
FIG. 7 shows the first-level DC-DC circuit conversion of the present invention;
fig. 8 shows the second-level DC-DC circuit conversion of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The utility model provides a machine carries optic fibre video shunting equipment, including photoelectricity-electro-optical conversion module, digital crosspoint switch module, MCU control module, level conversion module, power conversion module and pilot lamp, as shown in FIG. 1.
The photoelectric-to-photoelectric conversion module consists of a high-performance HTG8518-MD-TD01YY compression joint type 12-path parallel optical transceiving integrated module and a peripheral circuit thereof, is used for receiving an optical signal, performing optical-to-electric processing on the optical signal, converting the optical signal into a high-speed alternating current CML signal, sending the high-speed alternating current CML signal to the digital cross point switch module for splitting an electric signal, receiving the split high-speed alternating current CML signal by the optical transceiving integrated module, performing electric-to-optical conversion on the split high-speed alternating current CML signal, and outputting the optical signal, wherein the optical signal transceiving is realized by adopting an MT optical interface, the optical signal is a multimode optical signal with the central wavelength of 850nm, and the single-channel transmission rate of the optical transceiving integrated module is 10.3125Gbps (the transmission rate is downward compatible).
The digital cross-point switch module adopts an ADN4612 digital cross-point switch chip, and a non-blocking switch core of the digital cross-point switch module adopts a 12 x 12 longitudinal and transverse structure and supports direct current or alternating current coupling differential CML level input/output. The high-speed alternating current CML module is used for receiving high-speed alternating current CML signals which are input by the photoelectric-to-electric-optical conversion module and output by RX 1-4 paths of optical signal conversion, and the data rate of each port of the digital cross-point switch module is up to 11.3Gbps, as shown in figure 2. The MCU control module respectively realizes 1-to-2 distribution of 4 paths of optical signals through a functional register of the digital cross point switch module configured by a serial control interface, and outputs 8 paths of high-speed alternating current CML electric signals to the photoelectric-to-optical conversion module to perform electric-to-optical conversion and then output the optical signals, wherein TX 1-4 is a first group of optical output, and TX 5-8 is a second group of optical output, as shown in FIG. 3.
The MCU control module adopts an STM32F207VGT6 singlechip of a high-performance ARM Cortex-M3 bit RISC core, the working frequency is as high as 120MHz, the singlechip I2C1 interface is electrically reset on the equipment, the read-write configuration is carried out on the digital cross point switch module function register value, a serial port monitoring mechanism is adopted, the data information of I2C read-write operation is printed and output through USART1 to judge whether the I2C operation is normal, and the MCU control module can select to monitor the working temperature, the voltage and the transmitting/receiving optical power of the optical transceiving integrated module in real time through the I2C2 interface, as shown in figure 4.
The level conversion module is connected between the MCU control module and the digital crosspoint switch module through an I2C bus by using PCA9517 level conversion, and is configured to control level conversion of 3.3V and 1.8V on the I2C bus, as shown in fig. 5.
The power conversion module is used for supplying power to the photoelectric-to-electric light conversion module, the digital cross point switch module, the MCU control module, the level conversion module and the indicator lamp, and adopts a two-stage DC-DC conversion power supply mode, as shown in FIG. 6. The first-stage DC-DC circuit converts the onboard DC28V voltage through an overcurrent, overvoltage, reverse and transient suppression protection circuit, a QPI-5LZ EMI filter, a DCM2322T72S0650T60 isolation, and a regulated DC-DC converter outputs a DC5V voltage, as shown in fig. 7. And (2) two-stage DC-DC circuit conversion, namely converting DC5V into power supply voltages 3.3V,1.8V and 2.5V required by each module by adopting an LTM4644 chip, providing output voltage tracking by external programming through a TRACK/SS pin, and realizing the sequential control of power-up and power-down of an ADN4612 chip core and IO voltages 2.5V and 1.8V, as shown in figure 8.
The indicator lamp is a 5V power indicator lamp and is used for displaying the power supply state of the equipment.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (7)
1. An airborne fiber optic video splitting device, comprising: the photoelectric-photoelectric conversion circuit comprises a photoelectric-photoelectric conversion module, a digital cross point switch module, an MCU control module, a level conversion module, a power conversion module and an indicator light;
the photoelectric-photoelectric conversion module adopts an optical transceiving integrated module to perform optical-electric processing on 4 paths of optical signals and then convert the optical signals into high-speed alternating current CML signals, the high-speed alternating current CML signals are input into a digital cross point switch module, the digital cross point switch module outputs 8 paths of high-speed alternating current CML signals to the photoelectric-photoelectric conversion module after 1-2 distribution is performed on the 4 paths of input optical signals, and the level conversion module is connected between an MCU control module and the digital cross point switch module through an I2C bus and controls 3.3V and 1.8V level conversion on the I2C bus.
2. The airborne fiber optic video splitting device of claim 1, wherein: the digital cross-point switch module adopts a 12 multiplied by 12 asynchronous digital cross-point switch chip.
3. The onboard fiber optic video splitting device of claim 1 or 2, wherein: the power supply conversion module supplies power to the photoelectric-photoelectric conversion module, the digital cross point switch module, the MCU control module, the level conversion module and the indicator lamp.
4. The airborne fiber optic video splitting device of claim 3, wherein: the indicator light is a 5V power indicator light and is used for displaying the power supply state of the equipment.
5. The onboard fiber optic video splitting device of claim 4, wherein: the data rate of each port of the digital cross-point switch module is 11.3Gbps.
6. The airborne fiber optic video splitting device of claim 5, wherein: the MCU control module adopts an STM32F207VGT6 singlechip, and the working frequency is 120MHz singlechip.
7. The onboard fiber optic video splitting device of claim 6, wherein: the light receiving and transmitting integrated module is an HTG8518-MD-TD01YY light receiving and transmitting integrated module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222616319.XU CN218601846U (en) | 2022-09-30 | 2022-09-30 | Airborne optical fiber video shunting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222616319.XU CN218601846U (en) | 2022-09-30 | 2022-09-30 | Airborne optical fiber video shunting equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218601846U true CN218601846U (en) | 2023-03-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222616319.XU Active CN218601846U (en) | 2022-09-30 | 2022-09-30 | Airborne optical fiber video shunting equipment |
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| CN (1) | CN218601846U (en) |
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- 2022-09-30 CN CN202222616319.XU patent/CN218601846U/en active Active
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