CN202282788U - AC IRIG-B demodulation system - Google Patents
AC IRIG-B demodulation system Download PDFInfo
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- CN202282788U CN202282788U CN201120457116XU CN201120457116U CN202282788U CN 202282788 U CN202282788 U CN 202282788U CN 201120457116X U CN201120457116X U CN 201120457116XU CN 201120457116 U CN201120457116 U CN 201120457116U CN 202282788 U CN202282788 U CN 202282788U
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Abstract
The utility model discloses an AC IRIG (Inter-Range Instrumentation Group)-B demodulation system, which comprises an input terminal for receiving an IRIG-B (AC) analyzed signal, the signal is transmitted to two paths by the input terminal; the first path is a zero-crossing comparator connected with a sampling time controller, and the sampling time controller is connected with standard signal frequency; the second path is a half-wave rectifier connected with the input terminal, and an AD sampler is connected to the half-wave rectifier, the AD sampler is connected with the CPU controller, the CPU controller is connected with the sampling time controller, and the sampling time controller transmits 1MHZINT to the CPU controller, and transmits sampling time to the AD sampler at the same time. The AC IRIG-B demodulation system is simple in circuit, has high reliability and high IRIG-B (AC) time precision and analysis precision, and meets the demand for high precision.
Description
Technical field
The utility model relates to the system that a kind of SECO AD gathers, and specifically is meant the demodulating system of a kind of IRIG-B of interchange.
Background technology
IRIG-B serial timing code is the timing code of per second one frame, and for the ease of transmitting, the sinusoidal wave carrier frequency of available standards carries out amplitude modulation(PAM).The frequency of standard sine wave carrier frequency is strict relevant with chip rate.The standard sine wave carrier frequency frequency of B sign indicating number is 1KHz.Simultaneously, its quadrature zero crossing is consistent with the forward position of institute's modulation format code element, and the B sign indicating number after the modulation is claimed IRIG-B (AC) sign indicating number usually, without common title IRIG-B (DC) sign indicating number of amplitude modulation(PAM).
IRIG-B (AC) sign indicating number is a kind of use time encoding form very widely, service time, just needs demodulation (decoding), from each loyal coding, obtains time scale and temporal information.The relative direct current of the decoding of alternating-current B sign indicating number is wanted difficulty, because when handling these signals, all need be converted into corresponding DC B sign indicating number.Can introduce error because of the effect of various noises during conversion, also treatment technology and the ability with circuit is relevant except the influence that received the quality of signal own for the size of error.
Along with the development of technological progress with society, people are also increasingly high to the requirement of time precision, so the error of demodulation time must be more and more littler.Have only demodulating error little, just can obtain best time precision.
The utility model content
The purpose of the utility model is to provide the demodulating system of a kind of IRIG-B of interchange, reduces the error of demodulation time, improves time precision.
The purpose of the utility model realizes through following technical proposals:
A kind of demodulating system that exchanges IRIG-B comprises receiving IRIG-B (AC) by the input port of analytic signal that input port is input to two circuits with signal; Article one, be zero-crossing comparator, zero-crossing comparator is connected with the sampling time controller, is connected with the signal frequency of standard on the sampling time controller; Second is the half-wave rectifier that is connected with input port; On half-wave rectifier, be connected with the AD sampler, the AD sampler is connected with cpu controller, and cpu controller is connected with the sampling time controller; The sampling time controller transfers to cpu controller with 1MHZINT, simultaneously to the AD sampler output sampling time.IRIG-B (AC) is divided into the two-way input by analytic signal after the input, the one tunnel through zero-crossing comparator; Obtain and the identical 1KHz pulse signal of carrier frequency, deliver to the sampling time controller, sampling time controller control AD sampler 245uS behind the rising edge of the 1KHz pulse signal of each entering sampling time controller begins continuous sampling 50 times; The sampling width is 10uS; 245uS produces through 1KHz and 5MHz signal combination, through the continuous sampling of every interval 200nS, just can parse the not code element information of (AC) of IRIG-; Code element information has been arranged; Under the acting in conjunction of control signal and 1KHz, just can obtain IRIG-B (AC), the etalon time signal, i.e. pps pulse per second signal; The input signal on another road gets into half-wave rectifier; AC signal has generating positive and negative voltage, for its AD sampling processing with regard to more complicated, and for IRIG-B (AC) signal of symmetry; The voltage of knowing its positive half cycle gets final product, and need not increase new AD sampling integrated circuit.
The signal frequency of described standard is 5MHZ.
The utility model compared with prior art has the following advantages:
A kind of demodulating system that exchanges IRIG-B of 1 the utility model, IRIG-B (AC) is divided into the two-way input by analytic signal after the input; One the tunnel through zero-crossing comparator, obtains and the identical 1KHz pulse signal of carrier frequency, delivers to the sampling time controller; Sampling time controller control AD sampler 245uS behind the rising edge of the 1KHz pulse signal of each entering sampling time controller begins continuous sampling 50 times, and the sampling width is 10uS, and 245uS produces through 1KHz and 5MHz signal combination; Continuous sampling through every interval 200nS; Just can parse the not code element information of (AC) of IRIG-, code element information has been arranged, under the acting in conjunction of control signal and 1KHz, just can obtain IRIG-B (AC); The etalon time signal, i.e. pps pulse per second signal;
A kind of demodulating system that exchanges IRIG-B of 2 the utility model, it is high to have the simple and reliable property of circuit, and IRIG-B (AC) time precision is resolved the precision height.
Description of drawings
Fig. 1 is the utility model circuit diagram.
Embodiment
Below in conjunction with embodiment the utility model is done further to specify, but the execution mode of the utility model is not limited thereto.
Embodiment
As shown in Figure 1, a kind of demodulating system that exchanges IRIG-B of the utility model comprises receiving IRIG-B (AC) by the input port of analytic signal; Input port is input to two circuits with signal, and article one is a zero-crossing comparator, and zero-crossing comparator is connected with the sampling time controller; Be connected with the signal frequency of 5MHZ standard on the sampling time controller, second is the half-wave rectifier that is connected with input port, on half-wave rectifier, is connected with the AD sampler; The AD sampler is connected with cpu controller; Cpu controller is connected with the sampling time controller, and the sampling time controller transfers to cpu controller with 1MHZINT, simultaneously to the AD sampler output sampling time.
As stated, just can realize the utility model well.
Claims (2)
1. demodulating system that exchanges IRIG-B is characterized in that: comprise receiving IRIG-B (AC) by the input port of analytic signal, input port is input to two circuits with signal; Article one, be zero-crossing comparator, zero-crossing comparator is connected with the sampling time controller, is connected with the signal frequency of standard on the sampling time controller; Second is the half-wave rectifier that is connected with input port; On half-wave rectifier, be connected with the AD sampler, the AD sampler is connected with cpu controller, and cpu controller is connected with the sampling time controller; The sampling time controller transfers to cpu controller with 1MHZINT, simultaneously to the AD sampler output sampling time.
2. a kind of demodulating system that exchanges IRIG-B according to claim 1 is characterized in that: the signal frequency of described standard is 5MHZ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120457116XU CN202282788U (en) | 2011-11-17 | 2011-11-17 | AC IRIG-B demodulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120457116XU CN202282788U (en) | 2011-11-17 | 2011-11-17 | AC IRIG-B demodulation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202282788U true CN202282788U (en) | 2012-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120457116XU Expired - Fee Related CN202282788U (en) | 2011-11-17 | 2011-11-17 | AC IRIG-B demodulation system |
Country Status (1)
| Country | Link |
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| CN (1) | CN202282788U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107812A (en) * | 2013-01-16 | 2013-05-15 | 航天科工深圳（集团）有限公司 | Alternating signal sampling device and implementation method thereof |
| CN105871531A (en) * | 2016-04-01 | 2016-08-17 | 钛能科技股份有限公司 | IRIG-B time code element analyzing method based on alternating current timing sampling |
-
2011
- 2011-11-17 CN CN201120457116XU patent/CN202282788U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107812A (en) * | 2013-01-16 | 2013-05-15 | 航天科工深圳（集团）有限公司 | Alternating signal sampling device and implementation method thereof |
| CN105871531A (en) * | 2016-04-01 | 2016-08-17 | 钛能科技股份有限公司 | IRIG-B time code element analyzing method based on alternating current timing sampling |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: The middle Tianfu Avenue in Chengdu city Sichuan province 610000 No. 1366 2 4 storey building 1-3 No. Patentee after: Chengdu for Polytron Technologies Inc Address before: 610000 Sichuan province Chengdu Tianfu Avenue high-tech incubator Park 5-1-12 Patentee before: CHENGDU COVE TECHNOLOGY CO., LTD. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120620 Termination date: 20171117 |