Method and device for converting direct current B code into power system serial port time message

Abstract

The invention belongs to the technical field of time synchronization, and particularly relates to a method and a device for converting a direct-current B code into a serial port time message of a power system. The invention aims to solve the problems of low precision and high cost of a CPU (Central Processing Unit) conversion mode adopted by the traditional method, and the time accuracy of the serial port time message signal of the power system can be superior to 1 microsecond. According to the main scheme, the device comprises a 10-frequency multiplication module, a code element identification module, a B code information analysis module, a second punctual edge extraction module, a 1PPS generation module, a time correction module, a serial port time message coding module, a serial port time message sending module and a serial interface driving circuit. Except for the serial interface driving circuit, the other modules are realized by the FPGA. The FPGA is adopted to convert the direct current B code into the power system serial port time message, high-precision serial port time message signal output is achieved, a CPU is not used, the hardware architecture is simple, stable and reliable, the cost is low, the device can be miniaturized and modularized, the application is flexible, and the expansibility is good.

Description

technical field [0001] The invention belongs to the technical field of time synchronization, and in particular relates to a method and a device for converting a DC B code into a power system serial port time message. Background technique [0002] IRIG is the abbreviation of Inter-Range Instrumentation Group, a subsidiary agency of the US Range Command Committee. IRIG serial time code has six formats in total, namely A, B, D, E, G, H, among which the IRIG-B format time code (hereinafter referred to as B code) is the most widely used. The time frame rate of the B code is 1 frame / s, which contains 100 bits of information, respectively representing BCD time information and control function information, and can also extract 1Hz and 100Hz pulse signals from it. [0003] In practical applications, the time signal transmission medium connecting the time synchronization device and the timed secondary equipment is usually twisted pair or optical fiber, and the signal type is usually ...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method and device for converting a DC B code into a power system serial port time message, and to solve the problems of low precision and high cost of the traditional method using a CPU conversion mode. The power system serial port time report of the present invention Text signal time accuracy can reach better than 1μs

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