A long-distance 1394B transmission apparatus with a large plugging number
A transmission device and long-distance technology, applied in the field of avionics, can solve the problems of shortening the distance, restricting the application of 1394B, and the low number of plugging and unplugging of optical fiber connectors, achieving good electromagnetic compatibility characteristics, avoiding the difficulty of hybrid wiring of optoelectronics, and saving internal effect of space
Inactive Publication Date: 2014-03-19
SHAANXI QIANSHAN AVIONICS
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[0002] The 1394B bus is a high-performance serial data bus. Because of its small footprint, low price, fast speed, flexible topology, and each port is both a node and a relay, it occupies a place in the aviation system bus. However, with the increase of transmission data rate, the distance of 1394B data transmission using metal medium cables is continuously shortened. Therefore, the speed of 1394B bus on current aviation airborne products is generally limited to 400Mbit working mode, and the transmission distance is about 20 meters. , and when optical fiber is used for 1394B bus data transmission, because the number of plugging and unplugging of the fiber optic connector is too low, it can only be used in the environment where the plugging is not frequent. The above shortcomings seriously restrict the application of 1394B in the field of aviation bus
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[0014] Below in conjunction with accompanying drawing the present invention is described in further detail, please refer to Figure 1 to Figure 2 .
[0015] In the present invention, a photoelectric conversion module 7 is added to the metal casing 1 to convert the electrical signal received by the quarter coaxial pin and the power interface 2 into an optical signal and transmit it to the optical sending pin 5 through the sending optical fiber 6 for data transmission; the optical signal Transmit to the photoelectric module 7 through the light receiving pin 4 and the receiving optical fiber 3, convert it into an electrical signal, and then receive the data through the quarter coaxial pin and the power interface 2; the electrical connection end is connected to the airborne product end, away from the signal source The distance is relatively short, which is less than the distance limited by 1394B transmission. At the same time, it has the advantage of many times of plugging and unp...
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The invention belongs to avionics field and especially relates to a long-distance 1394B transmission apparatus with a large plugging number. The long-distance 1394B transmission apparatus with a large plugging number comprises a metallic housing 1, and a quartered coaxial pin and power interface 2 for providing power and transmitting electric signals. One end of a photoelectric converting module 7 is connected with the quartered coaxial pin and power interface 2. The other end of the photoelectric converting module 7 is connected with an optical receiving pin 4 via a receiving fiber 3, and an optical transmitting pin 5 via a transmitting fiber 6. Compared with a product using fiber transmission, the long-distance 1394B transmission apparatus with a large plugging number is not required to independently design a photoelectric converting circuit if being used to transmit signals. Therefore, the internal space of an airborne product can be saved and difficulty in photoelectric mixing wiring in an airborne product cabinet can be prevented.
Description
technical field [0001] The invention belongs to the field of avionics, and in particular relates to a long-distance 1394B transmission device with high insertion and extraction times. Background technique [0002] The 1394B bus is a high-performance serial data bus. Because of its small footprint, low price, fast speed, flexible topology, and each port is both a node and a relay, it occupies a place in the aviation system bus. However, with the increase of transmission data rate, the distance of 1394B data transmission using metal medium cables is continuously shortened. Therefore, the speed of 1394B bus on current aviation airborne products is generally limited to 400Mbit working mode, and the transmission distance is about 20 meters. , and when optical fiber is used for 1394B bus data transmission, because the number of plugging and unplugging of the fiber optic connector is too low, it can only be used in an environment that is not frequently plugged and unplugged. The ab...
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Login to View More IPC IPC(8): H04B10/25G02B6/42
Inventor 程金费生波
Owner SHAANXI QIANSHAN AVIONICS