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Synchronization and time keeping method for synchronous sampling signals

A technology for synchronizing sampling and signals, which is applied in multiplexing communication, time-division multiplexing systems, electrical components, etc., to solve the problem of sampling asynchrony, improve accuracy, and improve measurement accuracy.

Pending Publication Date: 2021-10-22
YANTAI DONGFANG WISDOM ELECTRIC
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

At present, the synchronization and punctuality of the sampling signal mostly directly use the external input synchronization signal, which fails to effectively solve the impact of the short-term interruption of the synchronization signal on the entire sampling system.

Method used

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  • Synchronization and time keeping method for synchronous sampling signals
  • Synchronization and time keeping method for synchronous sampling signals
  • Synchronization and time keeping method for synchronous sampling signals

Examples

Experimental program
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Embodiment Construction

[0030] The technical solution of the present invention will be described in connection with the accompanying drawings:

[0031] In this embodiment, the EPM 570 is used as the master chip, the system clock fsys is 50 MHz; the period T of the input synchronization base wave signal FB is 10 ms, the frequency fs of the output synchronous sampling signal is 4 kHz, and the period is 250 microseconds.

[0032] like figure 1 , Synchronous sampling signal synchronous and traveling method, including the following steps:

[0033] S1, perform system initialization, configure the synchronization input pin of the master chip to input, register CNT, CNT_H, CNT_L clear, the travel time flag TKEEP_FLAG is cleared, the system clock frequency fsys initial value is set to 50MHz.

[0034] Detect whether the synchronous base wave signal of the external input is normal, and step S2-1 and steps S2-2 are synchronized normally, otherwise the proceeds to step S3. Specifically, the synchronous input pin of t...

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Abstract

The invention discloses a synchronization and time keeping method for synchronous sampling signals, which comprises the following steps: detecting whether a synchronous fundamental wave signal is normal or not, and if so, measuring the synchronous fundamental wave signal, calculating a system clock error, setting a time keeping mark, simultaneously capturing a rising edge of the synchronous fundamental wave signal, and generating a synchronous sampling fundamental wave signal; otherwise, determining whether the time keeping mark is set or not, if so, generating a synchronous sampling fundamental wave signal according to the system clock error, and if not, generating the synchronous sampling fundamental wave signal according to a default counter value; and outputting synchronous sampling signals according to the synchronous sampling fundamental wave signals generated under different conditions. According to the invention, the problem of asynchronous sampling caused by interruption of an external input synchronous signal can be effectively solved, and the precision of synchronous sampling is further improved.

Description

Technical field [0001] The present invention relates to a synchronous and objection method of synchronous sampling signals. Background technique [0002] The measurement of electrical parameters of the power system is a reliable operation of the entire power system. The electrical parameters such as data support, voltage, current, and power are undoubtedly the most important electrical parameters of the entire electricity system, directly affecting the production of electricity production and people. Life. During many electrical parameters measurement, voltage and current synchronous sampling measurements are particularly important, and the synchronization error of the sampling directly affects the measurement results, and the proceduction of the sampling synchronization signal determines the measurement of the entire sampling system in the case of synchronous signal interruption accuracy. The synchronization of the current sampling signal is mostly directly utilized by the exter...

Claims

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Application Information

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IPC IPC(8): H04J3/06
CPCH04J3/0638
Inventor 张发忠邓文栋刘志军李文杰王越
Owner YANTAI DONGFANG WISDOM ELECTRIC
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