High-efficiency crystal oscillator frequency timekeeping method

A crystal oscillator frequency and high efficiency technology, applied to radio-controlled timers, clocks driven by synchronous motors, electronic timers, etc., can solve problems such as excessive punctuality deviation and achieve high punctuality accuracy

Inactive Publication Date: 2015-04-22
XJ ELECTRIC +1
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Problems solved by technology

[0005] The purpose of the present invention is to provide a high-efficiency crystal oscillator timekeeping method, aiming to solve the problem of excessive timekeeping deviation of the timekeeping function device of the intelligent substation

Method used

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  • High-efficiency crystal oscillator frequency timekeeping method

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Embodiment Construction

[0020] Such as figure 1 Shown is the specific flow chart of the embodiment of the present invention, and the concrete steps of the inventive method are as follows:

[0021] Step 1: Create a receiving second pulse crystal oscillator count buffer rev_buf, the buffer size is 512, used to record the latest 512 normal received second pulse crystal oscillator counts;

[0022] Step 2: Create 512 chronological second pulse buffers, which are used to fill the buffer with the received second pulse crystal oscillator count when the time synchronization signal of the device is abnormal, and the device recycles the count of the buffer to complete the punctual function;

[0023] Step 3: Create a data table to insert the remainder obtained by dividing by 8 into 8 buffers on average. The specific implementation data table is as follows:

[0024] Table 1 Distribution table of remainder of 8

[0025] remainder Buf1 Buf2 Buf3 Buf4 Buf5 Buf6 Buf7 Buf8 0 0 0 0 0...

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Abstract

The invention relates to a high-efficiency crystal oscillator frequency timekeeping method. According to the method, a device can receive a time synchronization signal of a time synchronizing device or a signal output by a GPS reception module; when the time synchronization signal or a satellite signal is normal, the crystal oscillator counting number in each second is calculated and cached; when the time synchronization signal or the satellite signal is lost, the average crystal oscillator counting number is calculated according to the recorded second-pulse crystal oscillator number, and generated remainder is shared equally; and the crystal counting number in each second after average and remainder sharing provides second pulses for time keeping. The method can be used improve the timekeeping precision and operation efficiency of equipment.

Description

technical field [0001] The invention relates to a high-efficiency crystal oscillator frequency timing method, which belongs to the field of intelligent substation development. Background technique [0002] Smart substation is a development direction of substation in smart grid. One of the main features of smart substation is the use of electronic transformers. With the use of electronic transformers, the analog quantity acquisition mode of substations has changed. Since the signals output by electronic transformers are small signals and low voltage, they are not suitable for long-distance transmission. The electronic transformers in the interval are relatively far away, and it is impossible to complete the collection of all the electronic transformers in the interval through one device. In this way, the sampling of the electronic transformers in an interval is independent of each other. In order to complete the decentralized acquisition of analog quantities in an interval A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04G7/00G04R20/02
Inventor 闫志辉周水斌郑拓夫尹明
Owner XJ ELECTRIC
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