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Absolute frequency difference measurement method, system and device based on delay line, and medium

A measurement method and measurement system technology, which is applied in the direction of frequency measurement devices, electrical components, power oscillators, etc., can solve problems such as insufficient accuracy, and achieve the effect of high compensation accuracy

Pending Publication Date: 2021-03-12
CHENGDU PRECISION TIME SPACE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem of insufficient precision in the traditional compensation method, the present invention provides a delay line-based absolute frequency difference measurement method, system, device and medium

Method used

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  • Absolute frequency difference measurement method, system and device based on delay line, and medium
  • Absolute frequency difference measurement method, system and device based on delay line, and medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Please refer tofigure 1 , figure 1 It is a schematic flowchart of a method for measuring absolute frequency difference based on a delay line. Embodiment 1 of the present invention provides a method for measuring absolute frequency difference based on a delay line. The method includes:

[0055] The local crystal oscillator generates the output signal;

[0056] Perform frequency division processing on the output signal to obtain a pulse signal whose period is within the measurement range of the delay line measurement device;

[0057] Measure the pulse period of the frequency-divided pulse signal through the delay line measurement device to obtain the frequency deviation value;

[0058] Generate a corresponding control output based on the frequency deviation value output by the delay line measurement device;

[0059] Convert the control output to the actual frequency control amount of the local crystal oscillator;

[0060] The output frequency of the local crystal oscil...

Embodiment 2

[0062] Please refer to figure 2 , figure 2 It is a schematic diagram of the composition of an absolute frequency difference measurement system based on a delay line. Embodiment 1 of the present invention provides an absolute frequency difference measurement system based on a delay line. The system includes:

[0063] A local crystal oscillator for generating output signals;

[0064] A frequency divider is used to perform frequency division processing on the output signal to obtain a pulse signal whose period is within the measurement range of the delay line measurement device;

[0065] The delay line measurement device measures the pulse period of the frequency-divided pulse signal through the delay line measurement device to obtain the frequency deviation value;

[0066] a processor, configured to generate a corresponding control output based on the frequency deviation value output by the delay line measurement device;

[0067] Crystal oscillator control generation circui...

Embodiment 3

[0081] Embodiment 3 of the present invention provides that the present invention also provides an absolute frequency difference measurement device, including a memory, a processor, and a computer program stored in the memory and operable on the processor, and the processor executes The computer program is the step of implementing the delay line-based absolute frequency difference measurement method.

[0082] Wherein, the processor can be a central processing unit (CPU, Central Processing Unit), and can also be other general processors, digital signal processors (digital signal processors), application specific integrated circuits (Application Specific Integrated Circuits), off-the-shelf programmable Gate array (Field programmable gate array) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.

[00...

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Abstract

The invention discloses an absolute frequency difference measurement method, system and device based on a delay line, and a medium. The absolute frequency difference measurement method comprises the steps of: generating an output signal by a local crystal oscillator; performing frequency division processing on the output signal to obtain a pulse signal of which the period is within the measurementrange of the delay line measurement device; measuring a pulse period of the pulse signal subjected to frequency division through a delay line measuring device to obtain a frequency deviation value; generating corresponding control output based on the frequency deviation value output by the delay line measuring device; converting the control output into an actual frequency control quantity of thelocal crystal oscillator; and controlling the output frequency of the local crystal oscillator based on the frequency control quantity, and compensating the deviation of the output signal of the localcrystal oscillator. According to the absolute frequency difference measurement method, the system and the device, the deviation of the output signal of the local crystal oscillator can be compensated, and the compensation precision is high.

Description

technical field [0001] The present invention relates to the field of time-frequency equipment signal processing, in particular to a delay line-based absolute frequency difference measurement method, system, device and medium. Background technique [0002] During the time-keeping process of time-frequency equipment, that is, when there is no external GPS / BDS or other sources to provide a reference clock (for example: second pulse), the local crystal oscillator will experience frequency drift due to its own aging characteristics or temperature characteristics. In order to stabilize and normally output the local frequency signal when there is no external reference clock, it is necessary to compensate the frequency offset of the crystal oscillator. [0003] The traditional compensation method is generally divided into two steps: [0004] Step 1: Record the aging parameters or temperature parameters of the local crystal oscillator when there is an external reference clock source...

Claims

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Application Information

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IPC IPC(8): G01R23/02H03B5/04
CPCG01R23/02H03B5/04
Inventor 朱芸曹林李旭
Owner CHENGDU PRECISION TIME SPACE TECH CO LTD