Double-way fully-redundant serial interface, optical transmitter and receiver, and system
A serial interface, fully redundant technology, applied in transmission systems, electromagnetic wave transmission systems, electrical components, etc., to achieve the effect of convenient implementation, strong real-time performance and low cost
Inactive Publication Date: 2011-08-03
CHINA AVIATION OPTICAL-ELECTRICAL TECH CO LTD
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[0013] The purpose of the present invention is to provide a dual-channel fully redundant serial interface, optical transceiver and system to solve the problem that the prior art cannot combine dual-channel serial signals for fully redundant transmission
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[0038] The method of the present invention will be described in further detail below in conjunction with the accompanying drawings. The embodiments all take the RS422 standard as an example, and the RS485 and RS232 standards can be applied directly, and will not be repeated here.
[0039] Serial interface embodiment
[0040] The key technology of dual-channel RS422 redundancy in this patent is how to directly short-circuit the same signal with two independent RS422 signals without affecting the performance index. Without any processing, if the RS422 bus is directly short-circuited, such as Figure 5 As shown, when the circuit board A transmits a valid "0" level and the circuit board B transmits an idle "1" level and the RS422 signals of the two circuit boards are short-circuited, the final RS422 bus will not be available. "0" level, resulting in transmission error.
[0041] In order to realize the key technology mentioned above, we have added such as Figure 6 The control ...
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The invention relates to a double-way fully-redundant serial interface, an optical transmitter and receiver, and a system. The core is the double-way fully-redundant serial interface; and the optical transmitter and receiver and the system can be obtained by performing corresponding short-circuit on a serial bus of the interface and expanding. A control enabling signal is added for a transmitting driver of the serial interface by correspondingly installing a control circuit on a serial interface; when two signals are both effective or ineffective, both of the two corresponding control enabling signals are effective; and when one of the two signals fails or is idle and the other signal is effective, the control enabling signal of the fault or idle signal is ineffective and the control enabling signal of the effective signal is effective. Therefore, the double-way fully-redundant serial interface, the optical transmitter and receiver and the system can automatically shield ineffective transmission channels, cannot cause a transmission error code, and realize real fully-redundant transmission.
Description
technical field [0001] The invention relates to the field of redundant transmission of serial signals, in particular to an interface for automatic fully redundant and transparent transmission of dual-channel serial signals, and an optical transceiver and an optical transmission system using the interface. Background technique [0002] Regarding the redundant transmission of serial signals, there are currently three technologies for redundant transmission of dual-channel serial signals, all of which take RS422 as an example: [0003] a) Pseudo redundant mode [0004] Such as figure 1 , the two RS422 signals are respectively converted into optical signals by optical transceiver 1 (optical transceiver 2), transmitted to optical transceiver 3 (optical transceiver 4) through optical fiber, and then converted into RS422 signals, and connected to a "2 in 1 device". An optical transceiver is a device that converts optical signals into electrical signals, and has no effect on trans...
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IPC IPC(8): H04B10/14H04B10/03
Inventor 陈旭辉魏利民陈志俊李森乔东旭
Owner CHINA AVIATION OPTICAL-ELECTRICAL TECH CO LTD