CN109687876A - A kind of IRIG-B alternating current code decoding circuit and method - Google Patents
A kind of IRIG-B alternating current code decoding circuit and method Download PDFInfo
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- CN109687876A CN109687876A CN201811541497.2A CN201811541497A CN109687876A CN 109687876 A CN109687876 A CN 109687876A CN 201811541497 A CN201811541497 A CN 201811541497A CN 109687876 A CN109687876 A CN 109687876A
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- irig
- alternating current
- current code
- voltage
- amplifier
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M9/00—Parallel/series conversion or vice versa
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- Theoretical Computer Science (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
The invention discloses a kind of IRIG-B alternating current code decoding circuit and methods.IRIG-B alternating current code decoding circuit includes transformer, comparator, amplifier and converter, the output end of the input terminal connection transformer of comparator, the output end of the input terminal connection transformer of amplifier, the input terminal of the output end connection converter of amplifier.IRIG-B alternating current code coding/decoding method includes IRIG-B alternating current code zero passage point extracting method and IRIG-B alternating current code voltage magnitude modulator approach, the voltage of IRIG-B exchange code signal sine wave positive half cycle is determined into zero crossing compared with reference voltage, the resistance value by changing amplifier makes IRIG-B alternating current code voltage magnitude close to desired voltage.This IRIG-B alternating current code coding/decoding method improves accuracy and reliability, has compressed decoding time.
Description
Technical field
The present invention relates to a kind of signal processing circuit structure and signal processing method more particularly to a kind of IRIG-B alternating current codes
Decoding circuit and IRIG-B alternating current code coding/decoding method.
Background technique
IRIG-B code is the serial time code applied to Timing System that U.S. target range instrument group (IRIG) is formulated, and is divided into straight
Flow code and alternating current code.In the prior art, IRIG-B alternating current code is not handled internal pulse per second (PPS), meeting before input terminal equipment
Cause to generate large error in the 1s that failure occurs, influences the accuracy and stability of Timing System time service.
Summary of the invention
In order to solve the above technical problems, the purpose of the present invention is to provide a kind of new IRIG-B alternating current code decoding circuit with
Coding/decoding method.
Technical solution provided by the invention is as follows:
A kind of IRIG-B alternating current code decoding circuit, including transformer, comparator, amplifier and converter, comparator
Input terminal connects the output end of transformer, the output end of the input terminal connection transformer of amplifier, the output end connection of amplifier
The input terminal of converter.
Further, the element in IRIG-B alternating current code decoding circuit, including transformer, comparator, amplifier and AD turn
Parallel operation is realized by DSP.
A kind of IRIG-B alternating current code coding/decoding method, including IRIG-B alternating current code zero passage point extracting method and IRIG-B alternating current code
Voltage magnitude modulator approach.
IRIG-B alternating current code zero passage point extracting method includes the following steps:
1. input transformer；
2. input comparator, if the voltage of IRIG-B exchange code signal sine wave positive half cycle is higher than reference voltage,
High level is then exported, if the voltage of IRIG-B exchange code signal sine wave negative half period is lower than reference voltage, is exported
Low level.
The rising edge of each rectangular wave is positive zero crossing, and failing edge is negative sense zero crossing, and sine wave is thus become same
The rectangular wave of frequency, i.e. second pulse signal.
Further, reference voltage is selected as the voltage intermediate value of IRIG-B code exchange code signal.
IRIG-B alternating current code voltage magnitude modulator approach includes the following steps:
1. input transformer；
2. input amplifier；
3. changing the resistance value of amplifier, so that the voltage magnitude of the IRIG-B alternating current code of output halves；
4. inputting converter, it is converted into digital signal, obtains the highest amplitude Vmax of current voltage.
5. judgement: if | Vmax- it is expected voltage | < 0.1 volt, stops, otherwise repeating 3. to 4..
Further, it is desirable to which voltage is the mathematic expectaion of voltage after the decoding of IRIG-B alternating current code.
The invention has the advantages that
IRIG-B alternating current code is divided into two-way while inputting, and generates second pulse signal through comparator zero passage all the way, and sine is handed over
Stream signal becomes the rectangular wave of same frequency, changes AC signal amplitude through amplifier all the way, and be converted to digital information, this
IRIG-B alternating current code coding/decoding method improves accuracy and reliability, has compressed the time.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in invention, for those of ordinary skill in the art, without creative efforts,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is IRIG-B alternating current code decoding circuit figure of the invention.
Specific embodiment
In order to make those skilled in the art more fully understand application scheme, below in conjunction in the embodiment of the present application
Attached drawing, technical solutions in the embodiments of the present application are explicitly described, it is clear that described embodiment be the application all the way
Embodiment, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making
Every other embodiment obtained, shall fall within the protection scope of the present application under the premise of creative work.
The description and claims of this application and term " includes " and their any deformations in above-mentioned attached drawing, meaning
Figure, which is to cover, non-exclusive includes.Such as process, method or system comprising a series of steps or units, product or equipment do not have
It is defined in listed step or unit, but optionally further comprising the step of not listing or unit, or optionally also wrap
Include the other step or units intrinsic for these process, methods, product or equipment.In addition, similar label and letter are under
Similar terms are indicated in the attached drawing in face, therefore, once being defined in a certain Xiang Yi attached drawing, are not then needed in subsequent attached drawing
It is further defined and explained.Term " first ", " second " and " third " etc. are for distinguishing different objects, Er Feiyong
In description particular order.
A kind of IRIG-B alternating current code decoding circuit, including transformer 1, comparator 2, amplifier 31 and converter 32, than
Compared with the output end of the input terminal connection transformer 1 of device 2, the output end of the input terminal connection transformer 1 of amplifier 31, amplifier 31
Output end connection converter 32 input terminal.
It is divided into two-way after IRIG-B alternating current code input transformer, all the way input comparator 2, if IRIG-B exchange code signal is just
The voltage of string wave positive half cycle is higher than the voltage intermediate value of IRIG-B code exchange code signal, then high level is exported, if IRIG-B alternating current code
The voltage of signal sine wave negative half period then exports low level lower than the voltage intermediate value of IRIG-B code exchange code signal, thus to obtain
Second pulse signal, another way input amplifier 31, by changing the resistance value of amplifier 31, so that the voltage magnitude of output halves,
Converter 32 is inputted again and is converted into digital signal, if the highest amplitude Vmax and V0 of current voltage is close enough, is stopped,
Otherwise, it still through the resistance value for changing amplifier 31, so that the voltage magnitude of output halves, then inputs converter 32 and is converted into
Digital signal, the highest amplitude Vmax and V0 for directly obtaining voltage is close enough, and wherein V0 is electricity after the decoding of IRIG-B alternating current code
The desired value of pressure.
Embodiment described above is only to illustrate the technical solution of the application, rather than its limitations；Although referring to aforementioned reality
Example is applied the application is described in detail, those skilled in the art should understand that: it still can be to aforementioned each
Technical solution documented by embodiment is modified or equivalent replacement of some of the technical features；And these are modified
Or replacement, the spirit and scope of each embodiment technical solution of the application that it does not separate the essence of the corresponding technical solution should all
Comprising within the scope of protection of this application.
Claims (5)
1. a kind of IRIG-B alternating current code decoding circuit, including transformer (1), comparator (2), amplifier (31) and converter
(32), which is characterized in that the input terminal of the comparator (2) connects the output end of the transformer (1), the amplifier (31)
Input terminal connect the output end of the transformer (32), the output end of the amplifier (31) connects the converter (32)
Input terminal.
2. IRIG-B alternating current code decoding circuit according to claim 1, which is characterized in that the transformer (1), comparator
(2), amplifier (31) and converter (32) are realized by DSP.
3. a kind of IRIG-B alternating current code coding/decoding method applied to IRIG-B alternating current code decoding circuit as claimed in claim 1 or 2, packet
Include IRIG-B alternating current code zero passage point extracting method and IRIG-B alternating current code voltage magnitude modulator approach, which is characterized in that described
IRIG-B alternating current code zero passage point extracting method includes the following steps:
1. input transformer (1)；
2. input comparator (2) exports height if the voltage of IRIG-B exchange code signal sine wave positive half cycle is higher than reference voltage
Level, if the voltage of IRIG-B exchange code signal sine wave negative half period exchanges the voltage intermediate value of code signal lower than IRIG-B code,
Export low level；
The IRIG-B alternating current code voltage magnitude modulator approach includes the following steps:
1. input transformer (1)；
2. input amplifier (31)；
3. changing the resistance value of amplifier (31), so that the voltage magnitude of the IRIG-B alternating current code of output halves；
4. inputting converter (32), it is converted into digital signal, obtains the highest amplitude Vmax of current voltage；
5. judgement: if | Vmax- it is expected voltage | < 0.1 volt, stops, otherwise repeating 3. to 4..
4. IRIG-B alternating current code coding/decoding method according to claim 3, which is characterized in that the reference voltage is IRIG-B
The voltage intermediate value of code exchange code signal.
5. IRIG-B alternating current code coding/decoding method according to claim 3, which is characterized in that the expectation voltage is IRIG-B
The mathematic expectaion of voltage after alternating current code decoding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811541497.2A CN109687876A (en) | 2018-12-17 | 2018-12-17 | A kind of IRIG-B alternating current code decoding circuit and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811541497.2A CN109687876A (en) | 2018-12-17 | 2018-12-17 | A kind of IRIG-B alternating current code decoding circuit and method |
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| CN109687876A true CN109687876A (en) | 2019-04-26 |
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| CN201811541497.2A Pending CN109687876A (en) | 2018-12-17 | 2018-12-17 | A kind of IRIG-B alternating current code decoding circuit and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112751569A (en) * | 2020-12-25 | 2021-05-04 | 北京航星机器制造有限公司 | Alternating current B code decoding circuit and decoding method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101493674A (en) * | 2008-01-24 | 2009-07-29 | 郑州威科姆技术开发有限公司 | B code demodulating and decoding method and apparatus thereof |
| CN202978820U (en) * | 2012-12-05 | 2013-06-05 | 天津光电通信技术有限公司 | Automatic phase detection gain device of IRIG-B AC code |
-
2018
- 2018-12-17 CN CN201811541497.2A patent/CN109687876A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101493674A (en) * | 2008-01-24 | 2009-07-29 | 郑州威科姆技术开发有限公司 | B code demodulating and decoding method and apparatus thereof |
| CN202978820U (en) * | 2012-12-05 | 2013-06-05 | 天津光电通信技术有限公司 | Automatic phase detection gain device of IRIG-B AC code |
Non-Patent Citations (1)
| Title |
|---|
| 熊立智等: "基于FPGA的IRIG-B解码电路设计与实现", 《通信技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112751569A (en) * | 2020-12-25 | 2021-05-04 | 北京航星机器制造有限公司 | Alternating current B code decoding circuit and decoding method |
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