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DC B code transmission delay compensation method and device

A technology of transmission delay and compensation method, applied in time division multiplexing systems, electrical components, multiplexing communication and other directions, can solve the problem of not meeting the time synchronization requirements of secondary equipment, and ensure reliability and achieve Delay compensation, ensure the effect of time synchronization

Active Publication Date: 2021-04-16
成都引众数字设备有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it cannot meet the time synchronization requirements of power plants and substations for secondary equipment

Method used

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  • DC B code transmission delay compensation method and device
  • DC B code transmission delay compensation method and device
  • DC B code transmission delay compensation method and device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] This embodiment discloses a DC B-code transmission delay compensation method, such as figure 2 and Figure 5 As shown, the method steps include:

[0055] Step A: Obtain the DC B code signal, and identify the cycle and symbol of the DC B code. When the deviation of the B code cycle is less than the preset time t, the deviation of the symbol pulse width is less than the preset time t 1 , extract the punctual edge of the DC B code and enter step B, otherwise block the compensation pulse generation and set the compensation signal to 0; the preset time t of the cycle deviation of the B code is 10 μs, and the preset time of the symbol pulse width deviation is t 1 It is 200μs, and the preset time t ahead of the time edge of B code 2 is 200μs.

[0056] There are 100 symbols in one cycle, 10 symbols in one group, 10 groups in total. The first code element of each group is a "P" code element, and the last code element of the last group is also a "P" code element. The numbers...

Embodiment 2

[0081] This embodiment is based on the first embodiment, and illustrates with examples that the compensation method of the first embodiment can be used. This embodiment discloses a DC B-code transmission delay compensation device, such as figure 1 As shown, the compensation device is used to implement a DC B-code transmission delay compensation method in Embodiment 1. The compensation device includes: a signal identification module, a punctual edge extraction module, a local 1PPS generation module, a compensation pulse generation module, and a delay setting module And punctually along with the replacement module:

[0082] The signal identification module is used to obtain the DC B code signal, and identify the cycle and symbol of the DC B code. When the deviation of the B code cycle is less than the preset time t, the deviation of the symbol pulse width is less than the preset time t 1 , extract the punctual edge of the DC B code and enter step B, otherwise block the compensat...

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PUM

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Abstract

The invention discloses a DC B code transmission delay compensation method, and the method comprises the steps: recognizing the period and code element of a DC B code, and extracting the punctual edge of the DC B code when the deviation of the period of the B code is smaller than the preset time t of the period deviation of the B code and the deviation of the pulse width of the code element is smaller than the preset time t1 of the pulse width deviation of the code element; extracting a punctuality edge of the direct current B code, and calculating a count value NS corresponding to a time interval of the punctuality edge; generating a local time signal rising edge of the advanced direct current B code punctuality edge preset time t2; setting a delay compensation value [delta]T; converting a set delay compensation value [delta]T into a count value N[delta]T, and delaying the rising edge of the local time signal for time corresponding to the count value [delta]N1 to obtain a compensation pulse; and performing logic OR on the generated compensation pulse and an input direct current B code, and synthesizing a compensated direct current B code. The method has the advantages that compensation of transmission delay can be achieved by adjusting the punctuality edge of the B code, and time synchronization of the time-served device and the time service device is achieved.

Description

technical field [0001] The invention relates to the technical field of time synchronization, in particular to a method and device for compensating a DC B-code transmission delay. 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 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, 10Hz and 100Hz pulse signals from the serial time code. [0003] With the rapid development of industrial automation, the requirements for time synchronization of automation equipment are getting higher and higher, and the applications are becoming more and more extensive. Device time synchroni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06H04J3/07
Inventor 魏旺全冯世林刘晓川段翔兮王彦峰彭上刘海洋温丽丽胡蓉
Owner 成都引众数字设备有限公司