A kind of decoding equipment and method of irig-b code

Abstract

The invention discloses a decoding device for IRIG‑B codes, comprising: a main control module, a counter 1 module, a counter 2 module, a counter 3 module, and a counter 4 module; the counter 1 module, counter 2 module, counter 3 module, The counter 4 module is electrically connected to the main control module; the counter 3 module is also electrically connected to the counter 2 module and the counter 4 module; the counter 1 module is provided with an overflow flag. Thus, the decoding device of the IRIG-B code of the present invention realizes the high-precision synchronization of the PPS signal and the IRIG-B code, the counter 1 module is provided with a high level duration threshold, and the counter 3 module is provided with an allowable error range, which realizes High reliability and high anti-interference in the decoding process. The invention also discloses a decoding method of the IRIG-B code.

Description

technical field [0001] The invention relates to the field of clock signal processing, in particular to an IRIG-B code decoding device and a IRIG-B code decoding method. Background technique [0002] IRIG (Inter-Range Instrumentation Group) is a subsidiary organization of the US Range Command Committee, called "Range Time Group". There are two broad categories of IRIG time standards: [0003] (1) One type is the parallel time code format. Since this type of code is a parallel format, the transmission distance is relatively short, and it is binary, it is far less extensive than the serial format; [0004] (2) The other type is serial time code, which has six formats, namely A, B, D, E, G, H. The main difference between them is the frame rate of the timecode. The main feature of B code is that the frame rate is 1 frame / s; it carries a large amount of information and is used most. The IRIG-B (DC) time code format is a conventional and well-known technology. The DC B code is ...

AI Technical Summary

Problems solved by technology

[0018] It can be seen that to decode and identify the IRIG-B signal, pulse width detection must be performed. In the current technical solution, the rising edge is generally detected, and the pulse width is detected to distinguish the symbol type. After the frame reference mark is determined, the PPS is synchronized. signal, the anti-interference ability is weak, once there is interference in the time series code, it is easy to cause decoding errors, in addition, the PPS signal is generated from the frame reference mark, and there are problems such as low synchronization accuracy

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