Automatic forward/reverse direction IRIG-B code decoding method

Abstract

The invention provides an automatic forward / reverse direction IRIG-B code decoding method. According to the method, a high precision oscillator clock module provides clocks for all modules, and clock precision is improved with the time filtering compensation algorithm; the direction of an IRIG-B code is identified through an IRIG-B code direction identifying module, the IRIG-B code is then converted into a required IRIG-B code, so that a forward direction IRIG-B code is provided for an IRIG-B code punctual edge identifying module; the IRIG-B code punctual edge identifying module extracts the punctual edge of the IRIG-B code, and a timestamp is provided for an IRIG-B information code identifying module, a pulse-per-second module and a serial port message module; time information is provided for the serial port message module by the IRIG-B information code identifying module; the pulse-per-second module outputs pulse-per-second signals and can provide the pulse-per-second clock synchronization service for clock synchronization equipment; the serial port message module outputs serial port messages and can provide the serial port clock synchronization service for the clock synchronization equipment. According to the automatic forward / reverse direction IRIG-B code decoding method, output time information is high in accuracy, light in fluctuation and good in long-term stability.

Description

technical field [0001] The invention relates to a method for automatically decoding forward / reverse IRIG-B codes, and a method for outputting serial port time information and second pulses with high accuracy, small fluctuations, and good long-term stability through a filter compensation algorithm based on a high-stable crystal oscillator , specifically relates to the method of decoding forward / reverse IRIG-B codes and outputting serial port time information and second pulses based on a high-stable crystal oscillator. Background technique [0002] Power system automation equipment has higher and higher requirements on time, so as to unify data information, event time, and accident investigation. In current power fault analysis, traveling wave ranging requires a time accuracy of up to 1us. The traditional IRIG-B decoding method not only cannot automatically identify forward / reverse, but also does not have the function of time filter compensation. The direction of the IRIG-B ...

AI Technical Summary

Problems solved by technology

The traditional IRIG-B decoding method not only cannot automatically identify forward / reverse, but also does not have the function of time filter compensation

The direction of the IRIG-B code cannot be automatically set, which will lead to poor compatibility of the system; the lack of time filter compensation function will result in low time accuracy

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