Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

B code demodulating and decoding method and apparatus thereof

A decoding method and decoding device technology, applied in the field of electronic automation, can solve problems such as complex implementation process, low precision, and easy to cause errors, and achieve the effect of simple principle, easy implementation, and high synchronization accuracy

Active Publication Date: 2009-07-29
郑州威科姆科技股份有限公司
View PDF2 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the previous technology, the method of generating a voltage analog signal with the same frequency and phase but different amplitudes and comparing the voltage with the IRIG-B analog signal is used to realize the decoding of the IRIG-B code. The implementation process is complicated and it is easy to cause errors. , the accuracy is not high

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • B code demodulating and decoding method and apparatus thereof
  • B code demodulating and decoding method and apparatus thereof
  • B code demodulating and decoding method and apparatus thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] B code decoding method comprises the following steps among the present invention:

[0032] ①. Measure the amplitude of the IRIG-B (AC) AC analog signal and compare it with the reference level to generate a square wave signal with a period of 1ms and a duty cycle of 50%, thereby determining the positive zero-crossing point of the analog signal. The level of the square wave signal is sampled by a digital logic circuit, and the level value at the adjacent time is detected to obtain the time of positive zero crossing;

[0033] ②. Use the positive zero crossing point of the analog signal to sample the IRIG-B (AC) AC analog signal, and compare it with the preset reference amplitude to generate the IRIG-B (DC) DC signal;

[0034] ③. Count the high-level width of the IRIG-B (DC) DC signal, judge and determine the rising edge position of the reference symbol, and determine the data information "1", "0" and the insertion time slot, and output the second pulse and time informatio...

Embodiment 2

[0048] B code decoding method comprises the following steps among the present invention:

[0049] ①. Measure the amplitude of the IRIG-B (AC) AC analog signal and compare it with the reference level to generate a square wave signal, thereby determining the positive zero-crossing point of the analog signal;

[0050] ②. Use the positive zero crossing point of the analog signal to sample the IRIG-B (AC) AC analog signal, and compare it with the preset reference amplitude to generate the IRIG-B (DC) DC signal;

[0051] ③. Count the high-level width of the IRIG-B (DC) signal, judge and determine the rising edge position of the reference symbol, and determine the data information "1", "0" and insert time slot information, and output the second pulse and time information.

[0052] Such as Figure 5 As shown, in step ②, when the rising edge of the zero-crossing detection signal is received, it is the zero degree of the phase of the sinusoidal signal, and the analog signal is sampled...

Embodiment 3

[0056] B code decoding method comprises the following steps among the present invention:

[0057] ①. Measure the amplitude of the IRIG-B (AC) AC analog signal and compare it with the reference level to generate a square wave signal, thereby determining the positive zero-crossing point of the analog signal;

[0058] ②. Use the positive zero crossing point of the analog signal to sample the IRIG-B (AC) AC analog signal, and compare it with the preset reference amplitude to generate the IRIG-B (DC) DC signal;

[0059] ③. Count the high-level width of the IRIG-B (DC) DC signal, judge and determine the rising edge position of the reference symbol, and determine the data information "1", "0" and the insertion time slot, and output the second pulse and time information.

[0060] In step 3., count the high level width of the IRIG-B (DC) direct current signal, obtain data "1", "0" and symbol information according to the judgment condition of the B code symbol width; Data frame struct...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for demodulating and decoding an IRIG-B code, comprising the steps as follows: 1. the amplitude of an IRIG-B alternating current analog signal is measured and compared with a reference level so as to generate a square wave signal, thus determining the positive over-zero point of the analog signal; 2. according to the positive over-zero point of the analog signal, the IRIG-B alternating current analog signal is sampled and compared for judgment with the pre-arranged reference amplitude, thus generating an IRIG-B direct current signal; and 3. the high level width of the IRIG-B direct current signal is counted, the rising edge position of the reference code is judged and determined, the data information '1' and '0' is determined, the time slot information is inserted and second pulse and time information are output. The invention which adopts the technical proposal can realize demodulation of the analog signal and can obtain the benchmark second pulse signal, time information and the like; the second pulse obtained by demodulation has high synchronization precision, simple principle and easy execution.

Description

technical field [0001] The invention belongs to the field of electronic automation, and in particular relates to a decoding method of an IRIG-B code, and at the same time relates to a device for realizing B code decoding by using the method. Background technique [0002] With the development of science and technology and automation technology, time synchronization network, as an important infrastructure, has played an important role in the fields of telecommunications, electric power and national defense. People put forward higher and higher requirements for time and time accuracy, and various time service methods continue to emerge. Satellite receivers of systems such as Beidou, GPS and GLONASS are used to output synchronization signals such as pulse-per-second and IRIG-B as reference time sources to provide time synchronization for automation equipment. [0003] IRIG originated from the time synchronization of the US Army's shooting range. The time system in the shooting ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G04F5/00G04G7/00H04L7/00
Inventor 贾小波杨玉清吴淑琴李军华张筱南
Owner 郑州威科姆科技股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com