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CN-121995728-A - Timing precision calibration system for intelligent sensor driven clock

CN121995728ACN 121995728 ACN121995728 ACN 121995728ACN-121995728-A

Abstract

The invention provides an intelligent sensor driven clock timing precision calibration system, which relates to the technical field of data processing, and is characterized in that temperature sensing units are arranged in different heated positions of a clock timing device to obtain original temperature sequence data with time marks and position information, a dominant heated area is identified based on temperature change rate and duration time and corresponding weight is generated, a heat transfer time difference is analyzed by combining a crystal oscillator mounting position to construct a local heat influence response sequence with time delay, a crystal oscillator frequency evolution process is deduced according to the response sequence and a predicted frequency offset is generated, timing pulses are pre-adjusted to form timing reference signals before error generation, and meanwhile, the dominant heat source weight and heat transfer delay relation are corrected by comparing with an external standard time source, so that dynamic calibration of timing precision is realized.

Inventors

  • HUANG XINHAI

Assignees

  • 福州三立电子有限公司

Dates

Publication Date
20260508
Application Date
20260410

Claims (10)

  1. 1. An intelligent sensor-driven timepiece timing accuracy calibration system, the system comprising: The space azimuth acquisition module is used for arranging temperature sensing units in different heated azimuth of the clock timing device, acquiring the space position and corresponding real-time temperature data of each temperature sensing unit, and generating original temperature sequence data with time marks and azimuth marks; The heat source dominant recognition module is used for calculating the temperature change rate and duration of each azimuth according to the original temperature sequence data, recognizing a dominant heated area which has main influence on the crystal oscillator, and generating a corresponding dominant heat source identifier and an action weight thereof; The heat transfer delay modeling module is used for analyzing the temperature change transfer time difference between the dominant heated area and the crystal oscillator position according to the dominant heat source identification and the crystal oscillator mounting position, and constructing a local heat influence response sequence containing a time lag relation; The predicted frequency offset generation module is used for deducing a frequency evolution sequence of the crystal oscillator in a subsequent time period according to the local thermal influence response sequence and generating a corresponding predicted frequency offset; the feedforward calibration control module is used for pre-adjusting the accumulated counting rhythm of the timing pulse before the timing error is actually generated according to the predicted frequency offset, and generating a feedforward corrected timing reference signal; And the closed-loop self-adaptive correction module is used for comparing the timing reference signal with an external standard time source, and correcting the relation between the weight of the dominant heat source and the heat transfer delay so as to continuously optimize the prediction precision.
  2. 2. The smart sensor-driven timepiece timing accuracy calibration system of claim 1, wherein said heat source dominant identification module comprises: the multisource competition evaluation unit is used for carrying out joint analysis on the change amplitude, the change rate and the change duration of each azimuth temperature in the continuous time period in the original temperature sequence data to form a competition relation sequence of the influence of each azimuth temperature change on the crystal oscillator temperature; the dominant switching judging unit is used for identifying a dominant heated area in the current time period in the competitive relation sequence, generating a dominant heat source switching mark when the influence degree between different directions is alternated, and recording a corresponding switching time period; And the dynamic weight distribution unit is used for distributing action weights changing along with time to the corresponding dominant heat source identifiers according to the influence continuity and superposition conditions of all directions before and after the switching in the dominant heat source switching process.
  3. 3. The smart sensor driven timepiece timing accuracy calibration system of claim 1, wherein said heat transfer delay modeling module comprises: the multi-path dividing unit is used for dividing the heat transfer process from the dominant heated area to the crystal oscillator position into a plurality of paths with different structures according to the dominant heat source identification and the space structure between the crystal oscillator mounting positions; the path difference analysis unit is used for respectively analyzing the transmission starting time and the transmission finishing time of the temperature change in each path and determining an independent transmission delay interval corresponding to each path; and the delay competition superposition unit is used for carrying out time sequence superposition on the thermal influences of different paths according to the transmission delay intervals of the paths and the sequence of the transmission delay intervals reaching the crystal oscillator position to form a local thermal influence response sequence containing a multipath sequence action relation.
  4. 4. The smart sensor-driven timepiece timing accuracy calibration system of claim 1, wherein said predicted frequency offset generation module comprises: The delay chain unfolding unit is used for conducting staged unfolding on the crystal oscillator temperature change process according to the arrival sequence of the thermal influence of different paths in the local thermal influence response sequence to form a temperature influence evolution sequence comprising a plurality of time periods; The phase superposition deduction unit is used for performing phase-by-phase superposition deduction on the crystal oscillator frequency change process according to the precedence relationship of each phase in the temperature influence evolution sequence to form a frequency evolution sequence reflecting the frequency change along with time in a future time period; and the pre-offset determining unit is used for determining the predicted frequency offset of the corresponding time period according to the frequency change part of the frequency evolution sequence corresponding to the future time period.
  5. 5. The smart sensor-driven timepiece timing accuracy calibration system of claim 1, wherein said feedforward calibration control module includes: The offset distribution generating unit is used for carrying out sectional expansion on the frequency change in the future time period according to the predicted frequency offset and the time sequence to form a frequency offset distribution sequence corresponding to each time period; The rhythm mapping generation unit is used for mapping the frequency offset of each time period into the adjustment rhythm of the accumulated count of the timing pulse according to the frequency offset distribution sequence to generate a corresponding count rhythm control sequence; the pre-adjustment execution unit is used for pre-adjusting the accumulated counting process of the timing pulse before the corresponding time period arrives according to the counting rhythm control sequence, and generating an initial timing reference signal corresponding to the frequency offset distribution sequence; and the continuous constraint correction unit is used for carrying out continuous constraint processing on the initial timing reference signal according to the rhythm change relation of adjacent time periods in the counting rhythm control sequence, correcting counting change transition between the adjacent time periods and generating a continuously-changed timing reference signal.
  6. 6. The smart sensor-driven timepiece timing accuracy calibration system of claim 2, wherein said multi-source competition assessment unit includes: The characteristic set generating subunit is used for carrying out association combination processing on the change amplitude, the change rate and the change duration of the temperature of each azimuth in the continuous time period in the original temperature sequence data to generate a temperature change characteristic set corresponding to each azimuth; The priority sequence generation subunit is used for sequencing the influence degree of the temperature change of each azimuth on the crystal oscillator temperature according to the change sequence and the change strength of each azimuth in the same time period in the temperature change characteristic set to generate a competition relation sequence with a priority sequence; The competition state generation subunit is used for judging whether the competition relationship is in a stable state or a change state according to the change condition of each azimuth priority in the competition relationship sequence along with time, generating a corresponding competition state identifier, and recording the continuous influence state of the dominant heated area in the stable state in a subsequent time period.
  7. 7. The smart sensor-driven timepiece timing accuracy calibration system according to claim 6, wherein said dominant switching determination unit includes: The dominant region generation subunit is used for determining a dominant heated region in the current time period according to the competition state identifier and the azimuth with the highest priority in the competition relation sequence, and generating a dominant region identifier; A switching process generating subunit, configured to identify an alternating process between an original dominant heated area and a new dominant heated area according to a change condition of a dominant area identifier between adjacent time periods, so as to generate a dominant switching process sequence; And the switching mark generation subunit is used for determining a corresponding time period when the original dominant heated area is switched to the new dominant heated area according to the dominant switching process sequence, generating a dominant heat source switching mark, and recording residual influence information of the original dominant heated area after switching for subsequent action weight distribution and calling.
  8. 8. The smart sensor-driven timepiece timing accuracy calibration system of claim 7, wherein said dynamic weight distribution unit includes: The stage weight generation subunit is used for respectively carrying out weight calculation processing on the original main heat conduction region, the new main heat conduction region and the residual influence region according to the main heat conduction switching process sequence, the main heat source switching identification and the residual influence record data to generate a corresponding stage action weight sequence; The continuous weight generation subunit is used for continuously adjusting the action weights corresponding to all the directions according to the time change relation of the stage action weight sequence, so that the weight change in the process of switching the dominant heat source keeps continuous transition, and a weight distribution sequence which continuously changes along with time is generated; The coupling weight generation subunit is used for carrying out coupling treatment on the action weights of all the directions according to the mutual influence relation between different directions in the weight distribution sequence and combining the dominant heat source switching identification, so that the mutual restriction relation is formed among the original dominant heat receiving area, the new dominant heat receiving area and the residual influence area, a composite weight sequence reflecting the multi-direction combined action is generated, and the composite weight sequence is used as the action weight corresponding to the dominant heat source identification.
  9. 9. The intelligent sensor-driven timepiece timing accuracy calibration system according to claim 3, wherein said path difference analysis unit includes: The path time sequence generation subunit is used for extracting the starting time and the ending time of the temperature change of each path according to the change process of the temperature change in each path in the continuous time period to generate corresponding path time sequence data; A delay section generating subunit, configured to perform section calculation processing on a temperature transmission process of each path according to a time difference between a start time and an end time of a temperature change of each path in the path timing data, so as to generate a corresponding path delay section; And the state association correction subunit is used for carrying out state association correction processing on the path delay sections according to the temperature change amplitude and the change trend in the temperature change process of each path, so that the delay sections of each path are adjusted along with the change of the temperature change state, and the independent transmission delay sections corresponding to each path are determined.
  10. 10. The smart sensor-driven timepiece timing accuracy calibration system according to claim 9, wherein said delay-competition superimposing unit includes: The arrival sequence generation subunit is used for sequencing the time sequence relation of the arrival of the thermal influence of different paths at the crystal oscillator position according to the independent transmission delay interval to generate a path arrival sequence; The state transfer generation subunit is used for generating an inter-path state transfer sequence by taking a temperature state formed by a path which arrives first at a crystal oscillator position as an initial action state of thermal influence of the path which arrives later according to the path arrival sequence; And the nonlinear superposition generating subunit is used for sequentially superposing the thermal influences of different paths on the basis of the former state according to the inter-path state transfer sequence, so that the action result of the later arriving path depends on the temperature state formed by the earlier arriving path, and a local thermal influence response sequence containing the inter-path interdependence relation is generated.

Description

Timing precision calibration system for intelligent sensor driven clock Technical Field The invention relates to the technical field of data processing, in particular to a timing precision calibration system for an intelligent sensor driven clock. Background The existing technology closest to the patent mostly adopts an electronic clock timing circuit to match with a reference oscillation source (such as a quartz crystal oscillator) to realize a time reference, and the time reference is calibrated with an external standard time source (such as a GPS or a radio time service signal) periodically or the oscillation frequency is compensated by a software algorithm. In addition, part of schemes introduce a temperature compensation crystal oscillator (TCXO) or a simple temperature sensor, and frequency deviation is corrected according to environmental temperature change so as to improve timing precision. However, in applications such as outdoor large public clocks (e.g., station tower clocks), such techniques have the obvious disadvantage that when the device is in a complex environment (large day-night temperature difference, uneven sunlight), local temperature gradient changes cannot be reflected in real time only by relying on single temperature compensation or intermittent time service. For example, the fact that one side of the clock body is directly irradiated by sunlight and the other side is shaded results in inconsistent crystal actual working temperature and measured temperature, accumulated errors are generated, and a few seconds of deviation can occur in a few hours, so that the time-telling accuracy is affected. Disclosure of Invention The invention aims to provide an intelligent sensor-driven clock timing precision calibration system, which aims to solve the problems in the background art. In order to solve the technical problems, the technical scheme of the invention is as follows: An intelligent sensor-driven timepiece timing accuracy calibration system, the system comprising: The space azimuth acquisition module is used for arranging temperature sensing units in different heated azimuth of the clock timing device, acquiring the space position and corresponding real-time temperature data of each temperature sensing unit, and generating original temperature sequence data with time marks and azimuth marks; The heat source dominant recognition module is used for calculating the temperature change rate and duration of each azimuth according to the original temperature sequence data, recognizing a dominant heated area which has main influence on the crystal oscillator, and generating a corresponding dominant heat source identifier and an action weight thereof; The heat transfer delay modeling module is used for analyzing the temperature change transfer time difference between the dominant heated area and the crystal oscillator position according to the dominant heat source identification and the crystal oscillator mounting position, and constructing a local heat influence response sequence containing a time lag relation; The predicted frequency offset generation module is used for deducing a frequency evolution sequence of the crystal oscillator in a subsequent time period according to the local thermal influence response sequence and generating a corresponding predicted frequency offset; the feedforward calibration control module is used for pre-adjusting the accumulated counting rhythm of the timing pulse before the timing error is actually generated according to the predicted frequency offset, and generating a feedforward corrected timing reference signal; And the closed-loop self-adaptive correction module is used for comparing the timing reference signal with an external standard time source, and correcting the relation between the weight of the dominant heat source and the heat transfer delay so as to continuously optimize the prediction precision. Preferably, the heat source dominant recognition module includes: the multisource competition evaluation unit is used for carrying out joint analysis on the change amplitude, the change rate and the change duration of each azimuth temperature in the continuous time period in the original temperature sequence data to form a competition relation sequence of the influence of each azimuth temperature change on the crystal oscillator temperature; the dominant switching judging unit is used for identifying a dominant heated area in the current time period in the competitive relation sequence, generating a dominant heat source switching mark when the influence degree between different directions is alternated, and recording a corresponding switching time period; And the dynamic weight distribution unit is used for distributing action weights changing along with time to the corresponding dominant heat source identifiers according to the influence continuity and superposition conditions of all directions before and after the switching in the dominant heat sourc