A method for time sequence synchronization transmission of operation data packet of a dry variable temperature control instrument

Abstract

The application relates to the technical field of measurement value transmission and discloses a running data packet time sequence synchronous transmission method of a dry variable temperature control instrument, which comprises the following steps: a parameter measurement end node acquires measurement data, and encapsulates original time stamps for the measurement data according to local crystal oscillator counting values; a convergence node extracts the original time stamps and takes the original time stamps as logical positioning coordinates, and distributes the measurement data to corresponding grid nodes in a logical time sequence grid; the data completeness of the logical time sequence grid is monitored in real time, and a termination signal is generated when the life cycle of a target grid reaches a forced termination threshold; a dynamic allowable deformation domain is determined based on the termination signal, missing positions of the target grid are filled by using historical measurement data when the topological constraint is met, and an integrated message is generated; the application releases the physical dependence of measurement data and communication link transmission sequences, eliminates phase distortion caused by transmission jitter, and guarantees the consistency of measurement data in a physical time section.

Description

Technical Field

[0001] This invention belongs to the field of measurement value transmission technology, and particularly relates to a method for time-synchronized transmission of operating data packets for a dry-type temperature control instrument. Background Technology

[0002] Currently, in the condition monitoring of dry-type transformers, temperature controllers collect thermal field signals from the windings and core through multiple physical channels and send the packaged data packets to the aggregation node using an industrial bus. Due to the inherent differences in the physical spatial layout of each temperature measurement channel within the transformer, the electromagnetic radiation flux carried by the cables exhibits an asymmetrical distribution, causing differentiated random time delay fluctuations in the transmission links of discrete data packets along each path. Traditional solutions often focus on hardware architecture optimization. For example, the utility model patent with authorization announcement number CN203164789U discloses a dry-type transformer temperature controller that integrates a CPU, acquisition, and communication module hardware units to achieve remote data transmission networking. It solves the signal on / off transmission problem through hardware stacking. However, the underlying logic relies on sequential triggering. Under strong electromagnetic interference, the lack of rigid binding between sampling time and data packet logic leads to phase distortion of the reconstructed message, reducing the accuracy of the transformer transient thermal field model construction. It is necessary to remove the physical link transmission sequence dependency at the logic orchestration layer to achieve timing synchronization of multi-channel data packets.

[0003] Conventional transmission schemes rely on fixed buffering mechanisms or simply increase physical layer communication bandwidth in an attempt to suppress signal jitter. This approach ignores the unevenness of interference levels in multi-channel measurements and makes it difficult to correct the phase misalignment between the source sampling time and the destination aggregation sequence at the logical level. When multiple measurement data reassembles the message at the aggregation node, the asymmetric delay directly causes phase distortion in the thermal field data of the same time section, thereby reducing the accuracy of the transformer transient thermal field model.

[0004] Therefore, how to handle the asymmetric delay of multi-channel measurement data packets under strong electromagnetic interference environment and improve the receiver's ability to restore the consistency of physical time sections has become the technical problem to be solved by this invention. Summary of the Invention

[0005] This invention proposes a method for time-synchronized transmission of operating data packets in a dry-type temperature control instrument, comprising the following steps: Step S1: Obtain measurement data at the parameter measurement terminal node, and encapsulate the measurement data with the native timestamp based on the local crystal oscillator count value of the parameter measurement terminal node to construct a data packet to be transmitted containing the physical acquisition time dimension; Step S2: Send the data packet to be transmitted to the aggregation node through the communication link; Step S3: The aggregation node extracts the original timestamp from the data packet to be transmitted, and performs coordinate positioning in the logical memory space according to the original timestamp, and assigns the measurement data to the corresponding spatiotemporal grid node in the preset logical time-series grid sequence, so as to remove the physical dependency between the measurement data and the transmission order of the communication link. Step S4: The aggregation node performs real-time statistical analysis on the data integrity of the logical time-series grid sequence, and activates a grid forced termination command when it detects that the dwell time of the target grid has reached the preset grid lifecycle forced termination threshold; the dwell time is the time difference between the moment when the aggregation node receives the first measurement data packet in the target grid and the current moment. Step S5: According to the grid forced termination command, the dynamic allowable deformation domain is determined for the target grid in the incomplete state. When the determination result meets the preset topology constraint conditions, the measurement data in the adjacent historical grid is extracted to fill the missing parts of the target grid, so as to generate an integrated message with consistent time section and output it to the data processing terminal, and drive the data processing terminal to perform the operation status evaluation of the measured subject.

[0006] Preferably, in step S1, the measurement data is encapsulated with a native timestamp. Specifically, at the instant the measurement data is generated, the current crystal oscillator count value of the parameter measurement terminal node is obtained, and the current crystal oscillator count value is embedded in the header of the data packet to be transmitted, so as to establish a data association structure that establishes a linear timeline mapping between the measurement data and the physical acquisition time.

[0007] Preferably, in step S3, the measurement data is assigned to the corresponding spatiotemporal grid node in the preset logical time grid sequence, including: the aggregation node opens a series of continuous logical time grids with fixed time intervals in the memory space according to the preset data refresh frequency, calculates the time offset of the original timestamp relative to the start time of the logical time grid sequence, and allocates the multi-channel measurement data belonging to the same physical time section to the logical time grid with the same sequence number according to the time offset.

[0008] Preferably, step S4, which monitors the data completeness of the logical timing grid sequence, specifically includes: counting the number of channels received within the logical timing grid and comparing it with the preset total number of channels; if the number of channels is equal to the total number of channels, then the logical timing grid is determined to be in a complete state and the integrated message generation process is triggered.

[0009] Preferably, the method for determining the preset grid lifetime forced termination threshold in step S4 is as follows: obtain the theoretical arrival time of the logical time-series grid sequence, add the theoretical arrival time to the jitter redundancy determined by the communication link delay variance, and set the result of the addition as the grid lifetime forced termination threshold.

[0010] Preferably, in step S5, a dynamic permissible deformation domain determination is performed, and the determination follows these rules: the phase change rate of the missing channel data in the target raster in adjacent historical raster cells is calculated, and the permissible deformation threshold is determined according to the following formula: Where δ is the allowable deformation threshold, and λ is a preset environmental disturbance weighting factor. The maximum time delay deviation value detected. For data transmission cycles, if the current delay of the target grid is less than the allowable deformation threshold δ, then the target grid is determined to meet the topological constraints.

[0011] Preferably, data filling for missing bits in the target raster includes: for the target raster that meets the topological constraints, extracting the historical measurement value sequence of the missing channel in the adjacent historical raster, generating simulated supplementary values ​​using a forward equal-step interpolation algorithm, and filling the simulated supplementary values ​​into the corresponding missing bits of the target raster to complete message reassembly.

[0012] Preferably, the process of generating an integrated message further includes: when generating the integrated message, adding a quality status bit to the measurement data of each channel; if the measurement data is obtained directly through the native timestamp, the quality status bit is marked as a valid value; if the measurement data is obtained through data filling, the quality status bit is marked as a deduced value.

[0013] Preferably, the driving data processing terminal performs an operational status assessment of the tested entity, specifically including: the data processing terminal constructs a transient feature evolution model based on the multi-channel measurement data in the integrated message, and when it is determined that the arrival frequency of the integrated message meets the preset refresh frequency, it compares the numerical deviation of the measurement data with a preset safety threshold, and outputs an early warning command based on the comparison result.

[0014] Preferably, the method further includes: the parameter measurement end node receiving the reference clock signal fed back by the aggregation node, calculating the deviation value between the reference clock signal and the local native timestamp, and adjusting the step frequency of the local crystal oscillator according to the deviation value, so that the native timestamp maintains topological convergence with the logical timing grid sequence during the transmission cycle.

[0015] Compared with existing technologies, the method for synchronous transmission of operating data packets in the dry-type temperature control instrument of the present invention has the following advantages: 1. In the operating data of the dry-type temperature control instrument, by independently establishing the delay dispersion baseline for multiple temperature acquisition channels, the aggregation node can generate a unique phase relaxation tolerance for the temperature measurement point identifiers at different physical locations. This creates an asymmetric elastic decision boundary at the logic layer, enabling the system to adaptively adjust the receiving boundary of the corresponding channel according to the differences in the electromagnetic environment of each acquisition point. This effectively solves the problem of global message reconstruction blocking caused by uneven interference levels in different temperature measurement channels under strong electromagnetic interference environments, ensuring that the data streams of other temperature measurement channels can still maintain normal timing alignment and output when the quality of a local channel deteriorates.

[0016] 2. By using the local high-precision native timestamp generated at the acquisition source as the absolute coordinate of the logical time window mapping, the aggregation node achieves rigid binding between the measured value and its physical acquisition time at the receiving end. This mechanism is free from dependence on the transmission order of the underlying physical link. Even if discrete data packets experience severe random delay jitter or arrive out of order during transmission, the system can still accurately locate the data in the corresponding spatiotemporal grid node in the preset time-series grid based on the native timestamp, eliminating the phase distortion of the measured value caused by transmission link jitter and ensuring the physical consistency of multi-dimensional thermal field data on the time cross-section.

[0017] 3. The scheme's pre-defined completeness judgment logic for the time-series grid and the grid lifecycle forced termination mechanism work together to construct a deterministic processing flow that balances synchronization accuracy and transmission timeliness. When data from a specific channel experiences timeout due to extreme interference, the system activates the dynamic permissible deformation domain to perform topology determination or fills in missing bits through forward interpolation, preventing the aggregation node from falling into an indefinite waiting state. This closed-loop logic not only improves the transmission system's resilience but also ensures that the integrated message output to the state evaluation system has a continuous and stable data frequency, providing a reliable data foundation for constructing an accurate transient thermal field gradient model of dry-type transformers. Attached Figure Description

[0018] Figure 1 This is a flowchart of the timing synchronization transmission control of data packets for the dry-type temperature control instrument of the present invention; Figure 2 This is the logic diagram of dynamic interpolation and data reconstruction of the target grid missing position in this invention. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0020] It should be noted that all directional and positional terms used in this invention, such as: up, down, left, right, front, back, vertical, horizontal, inner, outer, top, bottom, transverse, longitudinal, center, etc., are only used to explain the relative positional relationship and connection between components in a specific state (as shown in the accompanying drawings). They are only for the convenience of describing this invention and do not require that this invention be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention. In addition, the descriptions of "first," "second," etc., in this invention are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0021] In the description of this invention, unless otherwise explicitly specified and limited, the terms installation, connection, and linking should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood in conjunction with the specific circumstances.

[0022] In the description of this specification, references to the terms "an embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example, and the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0023] A method for time-synchronized transmission of operating data packets in a dry-type temperature controller includes the following steps:

[0024] Step S1: Obtain measurement data at the parameter measurement terminal node, and encapsulate the measurement data with the native timestamp based on the local crystal oscillator count value of the parameter measurement terminal node to construct a data packet to be transmitted containing the physical acquisition time dimension;

[0025] Step S2: Send the data packet to be transmitted to the aggregation node through the communication link; Step S3: The aggregation node extracts the original timestamp from the data packet to be transmitted, and performs coordinate positioning in the logical memory space according to the original timestamp, and assigns the measurement data to the corresponding spatiotemporal grid node in the preset logical time-series grid sequence, so as to remove the physical dependency between the measurement data and the transmission order of the communication link. Step S4: The aggregation node performs real-time statistical analysis on the data integrity of the logical time-series grid sequence, and activates a grid forced termination command when it detects that the dwell time of the target grid has reached the preset grid lifecycle forced termination threshold; the dwell time is the time difference between the moment when the aggregation node receives the first measurement data packet in the target grid and the current moment. Step S5: According to the grid forced termination command, the dynamic allowable deformation domain is determined for the target grid in the incomplete state. When the determination result meets the preset topology constraint conditions, the measurement data in the adjacent historical grid is extracted to fill the missing parts of the target grid, so as to generate an integrated message with consistent time section and output it to the data processing terminal, and drive the data processing terminal to perform the operation status evaluation of the measured subject.

[0026] Preferably, in step S1, the measurement data is encapsulated with a native timestamp. Specifically, at the instant the measurement data is generated, the current crystal oscillator count value of the parameter measurement terminal node is obtained, and the current crystal oscillator count value is embedded in the header of the data packet to be transmitted, so as to establish a data association structure that establishes a linear timeline mapping between the measurement data and the physical acquisition time.

[0027] Preferably, in step S3, the measurement data is assigned to the corresponding spatiotemporal grid node in the preset logical time grid sequence, including: the aggregation node opens a series of continuous logical time grids with fixed time intervals in the memory space according to the preset data refresh frequency, calculates the time offset of the original timestamp relative to the start time of the logical time grid sequence, and allocates the multi-channel measurement data belonging to the same physical time section to the logical time grid with the same sequence number according to the time offset.

[0028] Preferably, step S4, which monitors the data completeness of the logical timing grid sequence, specifically includes: counting the number of channels received within the logical timing grid and comparing it with the preset total number of channels; if the number of channels is equal to the total number of channels, then the logical timing grid is determined to be in a complete state and the integrated message generation process is triggered.

[0029] Preferably, the method for determining the preset grid lifetime forced termination threshold in step S4 is as follows: obtain the theoretical arrival time of the logical time-series grid sequence, add the theoretical arrival time to the jitter redundancy determined by the communication link delay variance, and set the result of the addition as the grid lifetime forced termination threshold.

[0030] Preferably, in step S5, a dynamic permissible deformation domain determination is performed, and the determination follows these rules: the phase change rate of the missing channel data in the target raster in adjacent historical raster cells is calculated, and the permissible deformation threshold is determined according to the following formula: Where δ is the allowable deformation threshold, and λ is a preset environmental disturbance weighting factor. The maximum time delay deviation value detected. For data transmission cycles, if the current delay of the target grid is less than the allowable deformation threshold δ, then the target grid is determined to meet the topological constraints.

[0031] Preferably, data filling for missing bits in the target raster includes: for the target raster that meets the topological constraints, extracting the historical measurement value sequence of the missing channel in the adjacent historical raster, generating simulated supplementary values ​​using a forward equal-step interpolation algorithm, and filling the simulated supplementary values ​​into the corresponding missing bits of the target raster to complete message reassembly.

[0032] Preferably, the process of generating an integrated message further includes: when generating the integrated message, adding a quality status bit to the measurement data of each channel; if the measurement data is obtained directly through the native timestamp, the quality status bit is marked as a valid value; if the measurement data is obtained through data filling, the quality status bit is marked as a deduced value.

[0033] Preferably, the driving data processing terminal performs an operational status assessment of the tested entity, specifically including: the data processing terminal constructs a transient feature evolution model based on the multi-channel measurement data in the integrated message, and when it is determined that the arrival frequency of the integrated message meets the preset refresh frequency, it compares the numerical deviation of the measurement data with a preset safety threshold, and outputs an early warning command based on the comparison result.

[0034] Preferably, the method further includes: the parameter measurement end node receiving the reference clock signal fed back by the aggregation node, calculating the deviation value between the reference clock signal and the local native timestamp, and adjusting the step frequency of the local crystal oscillator according to the deviation value, so that the native timestamp maintains topological convergence with the logical timing grid sequence during the transmission cycle.

[0035] Example 1: In the scenario of online monitoring of high-frequency dynamic thermal field of dry-type transformers in continuously operating substations, multiple temperature acquisition nodes are distributed in physical spaces with heterogeneous electromagnetic radiation flux, such as the surface of the high-voltage winding and deep core. This causes the data packets to be transmitted in each channel to encounter asymmetric medium access backoff and random delay fluctuations during the transmission of the communication link. Traditional measurement value transmission systems use first-in-first-out queues based on arrival time or rigid global time grids to deal with this asymmetric delay. As a result, the measurement data of local strong interference channels are judged as invalid and discarded because they exceed the rigid time boundary. This causes phase distortion and chain data integrity blockage in the multi-channel measurement value sequence at the receiving end. This makes the downstream data processing terminal face the technical problem of lack of consistency of multi-dimensional thermal field data on the physical time section when constructing transient thermal field feature evolution models.

[0036] The method for synchronous transmission of data packets in the dry-type temperature control instrument of the present invention sets specific physical mapping and constraint procedures for the above-mentioned working conditions. The parameter measurement node extracts the current crystal oscillator count value and encapsulates the original timestamp at the instant the measurement data is generated. The aggregation node receives the data packet to be transmitted, extracts the original timestamp, and locates the coordinates in the logical memory space. Based on the time offset, multi-channel measurement data belonging to the same physical time section are allocated to the corresponding spatiotemporal grid nodes in the set logical time-series grid sequence. The aggregation node continuously monitors the data completeness of the logical time-series grid sequence and activates a grid forced termination command when the dwell time of the target grid reaches the grid lifecycle forced termination threshold determined by the theoretical arrival time and the variance of the communication link delay. For target grids in an incomplete state, asymmetric elastic boundary reshaping logic is triggered to determine the dynamic allowable deformation domain. The system calculates the phase change rate of the missing channel data in the target grid in adjacent historical grids and applies the formula... Determine the allowable deformation threshold, where δ is the allowable deformation threshold and λ is the set environmental interference weighting factor. The maximum time delay deviation value detected. During the data transmission cycle, when the current delay of the target grid is less than the allowable deformation threshold δ, the system determines that the target grid meets the set topology constraints. The topology constraints essentially refer to the legality of the target data packet's location in the second-order spatiotemporal matrix formed by the logical memory space. That is, by verifying the temporal deviation between the physical arrival time of the data packet and the coordinates of the logical grid point corresponding to its original timestamp, the system determines whether the offset is within the allowable elastic topology tolerance range of the grid point on the time axis, thereby ensuring the correctness of the data reassembly in the logical structure. The system extracts the historical measurement value sequence of the missing channel in the adjacent historical grid and uses a forward equal-step interpolation algorithm to generate simulated supplementary values ​​to fill the corresponding missing positions of the target grid. Finally, it outputs an integrated message with consistent time cross-section to the data processing terminal.

[0037] The aforementioned mesh mapping process based on native timestamps, in conjunction with the missing bit filling mechanism based on dynamic permissible deformation domain determination, transforms the time-domain delay dispersion caused by random jitter in the communication link into an elastic topology space computation domain for the receiver's buffer queue. Under this constraint, the asynchronous arrival time difference caused by heterogeneous electromagnetic interference in different channels is converted into a data association structure based on a linear mapping of a unified time axis. The timing disorder variables of the underlying communication link are restricted within a preset spatiotemporal topology matrix. The integrated message received by the data processing terminal contains an accurate temperature scalar and retains the consistency association of acquisitions at each temperature measurement point on the physical time plane. By reconstructing the buffer depth at the logic orchestration layer and introducing a topology constraint relaxation mechanism, the signal timing reshaping of the transmission system that offsets the asymmetric time phase offset of the physical layer is achieved without changing the underlying hardware transmission medium. The parameter measurement end node receives the reference clock signal, calculates the deviation between the reference clock signal and the local native timestamp, calls the crystal oscillator stepping frequency compensation procedure, and modifies the prescaler register configuration value of the clock control unit so that the local crystal oscillator count value is in subsequent transmission cycles. The system generates a compensating displacement to offset the logical phase misalignment caused by physical link delay jitter. Specifically, the crystal oscillator step frequency compensation procedure adopts incremental PID control logic. The parameter measurement end node uses the calculated deviation value as an input variable and adjusts the count value of the prescaler register according to the preset proportional coefficient to fine-tune the step interval of the clock pulse. When the local native timestamp is detected to be ahead of the reference signal, the prescaler ratio is increased to reduce the increment frequency of the count value, and vice versa to reduce the prescaler ratio to accelerate frequency convergence. This ensures that the sampling time of the next cycle generates a reverse displacement on the physical time axis equal to the deviation, ensuring that the native timestamp and the starting pulse of the logical timing grid remain in phase synchronization. The aggregation node uses a multi-core chip. The first core performs logical timing grid mapping and data filling, while the second core maintains the moving average statistics of communication link delay variance in the background. Under the condition of sudden load changes in the substation, the integrated message output frequency is locked at the refresh rate to provide data support for building a transient thermal field model.

[0038] Example 2: A data acquisition and transmission architecture, including temperature sensors and aggregation nodes, was constructed on a physical test platform simulating a strong electromagnetic interference environment in a substation. The data source of this test platform is an optical fiber temperature probe deployed on the surface of the high and low voltage windings of a custom dry-type transformer. The temperature measurement range covers -40℃ to 200℃, and the sampling rate is set to 1kHz. To verify the anti-interference capability, Gaussian white noise with a signal-to-noise ratio of 20.5dB and a 50Hz power frequency interference harmonic were injected into the test signal source to induce random asymmetric delay in the communication link. The data transmission period was then determined. At this time, it is necessary to balance the transient resolution requirements of thermal field monitoring with the physical bandwidth capacity limit of the communication link. When the monitored transformer is in a non-steady-state condition with frequent load fluctuations, the transmission cycle needs to be reduced in order to capture transient hot spots. The system determines the data transmission cycle based on Shannon sampling theorem and link capacity constraints. It takes 10ms.

[0039] A multi-dimensional control system was established, comprising a control group, a partially missing control group, and an experimental group. The control group employed a first-in-first-out buffer queue and a unified time threshold determination mechanism. The partially missing control group used a logical temporal raster sequence based on native timestamps but stripped of dynamic allowable deformation domain determination and interpolation filling logic. The experimental group employed a complete technical solution including allowable deformation threshold calculation and forward equal-step interpolation algorithm. The maximum time delay deviation value was injected. Under a disturbance condition of 15.4ms, the control group's phase alignment success rate dropped to 42.1% due to the rigid time boundary causing the system to judge a large number of delayed measurement data as invalid. The partially missing control group improved the phase alignment success rate to 73.5% by using the physical time section mapping mechanism of the logical temporal grid, but zero-value holes appeared when encountering burst impulse noise interference. Under the same conditions, the experimental group extracted the original timestamps of each channel and located the spatiotemporal grid nodes in the logical memory. The system calculated and issued the dynamic allowable deformation threshold δ in real time according to the monitored link status. The measured data showed that the allowable deformation threshold dynamically followed the link jitter amplitude and adaptively adjusted between 1.2ms and 3.9ms, covering the tail probability distribution of effective delayed messages, so that the effective interpolation filling rate reached 94.2%, and the phase alignment success rate of the output integrated message was stable at 98.7%. The above quantitative data confirmed the synergistic effect of the logical temporal grid, dynamic allowable deformation boundary reshaping and interpolation filling algorithm working together.

[0040] To explore the formula The working window and physical boundary constraints of the environmental interference weighting factor λ were used to establish a gradient control system for this parameter value. The parameter value was set to 0.5 for the out-of-range control group one, 1.5 for the experimental group, and 3.0 for the out-of-range control group two. The test results showed a non-linear performance inflection point pattern. When using the out-of-range control group one with a value of 0.5, the system's allowable deformation domain was too small, causing the system to forcibly discard 28.4% of repairable slightly overdue data packets. When using the experimental group with a value of 1.5, the system achieved a balance between latency and data integrity, controlling the overall data packet drop rate to 1.2% without causing downstream data processing module blockage. When using the out-of-range control group two with a value of 3.0, the experimental data revealed a degradation effect; the excessively large weighting factor caused the target grid's dwell time to frequently exceed the acceptable range. The system experienced a queue overflow crash during the maximum physical buffer period specified by the communication protocol. The average end-to-end transmission delay abruptly increased from 12.4ms to 145.6ms. This set of objective quantitative data, which includes the inflection point of nonlinear degradation, provides empirical evidence for limiting the range of the environmental interference weighting factor. The aforementioned continuous experimental data, which includes multi-dimensional disturbance injection and gradient parameter boundary detection, objectively demonstrates that this technical solution, by extracting the original timestamp to construct a logical time-series grid sequence and combining the dynamic determination of the quantified allowable deformation threshold with the historical data interpolation mechanism, transforms random time-domain jitter into an elastic topology compensation domain for the buffer queue under the condition of asymmetric delay and electromagnetic interference in the underlying physical link. This maintains the consistency of multi-channel measurement data acquisition and message integrity on the physical time section. This process achieves physical and logical correction of the timing distortion defects of the measurement value transmission system without changing the physical communication bandwidth resources.

[0041] Example 3: In a monitoring scenario where a sudden change in substation load triggers a transient electromagnetic surge, the signal-to-noise ratio of the wireless communication link between the temperature measurement node and the aggregation node fluctuates drastically. This causes sudden loss or extreme delay of measurement data packets in local channels at the physical transmission layer. If the transmission system relies solely on timeout discard rules, the thermal field data matrix output by the receiver will contain numerous time axis holes, leading to misjudgments in downstream equipment status assessment algorithms due to input feature discontinuities. The aggregation node of this invention initiates a forward equal-step interpolation reconstruction process for data loss states. The system pre-sets a sliding sampling window containing continuous data transmission cycles in the logical memory, collects the actual arrival time of data packets for each channel cycle by cycle, calculates the variance of the deviation from the theoretical arrival time, extracts this variance as the communication link delay variance, multiplies this communication link delay variance by the set reference transmission cycle to obtain the jitter redundancy, and combines the theoretical arrival time with this jitter redundancy to establish the grid lifetime forced termination threshold.

[0042] When the dwell time of a target grid reaches the forced termination threshold and a data channel is missing, the system determines that the target grid meets the topological constraints. It extracts the two most recently successfully received valid measurements of the missing channel within the sliding sampling window, calculates the difference between these two valid measurements, divides it by the total number of transmission cycles between them to obtain the forward constant step change rate, adds the valid measurement of the nearest target grid in the time dimension to the forward constant step change rate, calculates the simulated supplementary value for the corresponding missing channel, and writes it to the corresponding memory address of the target grid. The missing bit filling process, which includes the variance statistics of the sliding sampling window and the calculation of the forward differential step size, transforms the interpolation algorithm into a specific operation sequence based on the real-time link status and the evolution law of historical temperature gradient. It reconstructs the transient temperature scalar of the overdue failed channel using the thermal inertia characteristics of adjacent physical time sections, maintains the matrix completeness of multi-channel measurement data within a unified logical time-series grid sequence, and eliminates the time discontinuity caused by physical layer interference of the communication link.

[0043] Example 4: In the pre-deployment calibration of the multi-channel thermal field monitoring system for dry-type transformers, no high-voltage load is applied to the physical space where the temperature measurement nodes and the aggregation node are located. During the initial power-on phase, the system exhibits initial baseline deviation characteristics caused by the manufacturing tolerance of the crystal oscillator components. The aggregation node sends a synchronous broadcast frame carrying an absolute zero time stamp to all temperature measurement nodes. Each temperature measurement node receives the broadcast frame and extracts the absolute zero time stamp, subtracts it from the current reading of the local crystal oscillator to obtain the initial hardware drift, and stores it in the local register as a compensation constant for the generation of the original time stamp. The aggregation node starts the link scanning sequence, injects a continuous white noise test spectrum with a set power spectral density into the communication link, and continuously sends probe data packets under this interference state to intercept the round-trip delay sample sequence of each channel.

[0044] After the aggregation node acquires the round-trip delay sample sequence, it initiates the quantization procedure. The processor extracts the data point in the sample sequence that deviates most from the mean, locates the maximum delay deviation, and calculates the sequence distribution variance. The system substitutes this distribution variance and the maximum delay deviation into the calibration space of the environmental interference weighting factor λ. Based on the set step size, the trial value of the environmental interference weighting factor λ is increased and the corresponding allowable deformation threshold δ is deduced. When the theoretical packet reception integrity rate calculated based on the deduced allowable deformation threshold δ first touches the set performance index threshold, the system determines that the evolution process has reached its end. The environmental interference weighting factor λ value at this time is extracted and written to the non-volatile configuration storage area. The pre-calibration procedure constructs a dedicated hardware compensation baseline and environmental boundary parameters for a specific physical channel. After the settings are completed, the timing synchronization transmission system enters the working state of carrying out thermal field data acquisition and dynamic message reassembly during the energized operation period.

[0045] Example 5: In the data transmission scenario of a dry-type transformer temperature control instrument deployed in a high-voltage power distribution room, the system faces the condition that the initial physical link state is unknown and the environmental interference factor λ needs to be accurately adapted to specific electromagnetic space characteristics. If pre-calibration is not performed, a system setting with a large allowable deformation threshold δ will cause queue overflow, while a system setting with a small allowable deformation threshold δ will lead to the accidental deletion of valid data. The aggregation node of this invention executes the on-site deployment pre-calibration procedure during the initial power-on phase of the system. The system sends continuous pseudo-random test sequences to each parameter measurement terminal node in a non-energized, no-load state, extracts the underlying physical link return frames containing 500 consecutive data transmission cycles, calculates the deviation between the actual arrival time and the theoretical arrival time of each test sequence, and extracts the maximum delay deviation. The aggregation node initiates a traversal trial sequence, incrementing the environmental interference weighting factor λ by 0.1 within a set range of 0.1 to 5.0. Each trial weighting factor is then substituted into the formula. The corresponding simulated allowable deformation threshold δ is derived, and this simulated allowable deformation threshold δ is substituted into the intercepted test sequence to calculate the data packet interpolation repair success rate under the current simulated allowable deformation threshold.

[0046] Through the aforementioned pre-traversal calibration process based on real link samples, the system obtains the data integrity and buffer delay mapping curve under a specific electromagnetic environment. It extracts the environmental interference weighting factor value corresponding to the inflection point coordinates where the interpolation repair success rate reaches 98% and the buffer queue does not overflow. This value is then solidified as the working point parameter for the current deployment environment. During subsequent powered operation, the timing synchronization transmission system adaptively reshapes the elastic boundary of the logical timing grid based on quantized physical boundary conditions, eliminating the risk of underlying transmission failure caused by blind parameter setting. Five to ten adjacent logical grid nodes within the target grid are selected as statistical windows to extract the corresponding channel's historical measurement scalar and calculate the numerical gradient between adjacent sampling points as the phase change rate. The environmental interference weighting factor is determined through on-site calibration. Under non-powered, unloaded conditions, test pulse signals are injected, and 1000 sample round-trip delay sequences are collected. The standard deviation of the distribution and the maximum delay deviation are extracted. The weighting factor is calculated by incrementing it in the range of 0.5 to 3.0 with a step size of 0.1; the completeness rate of the logical time-series grid is statistically analyzed, and the critical value of 98.5% completeness rate and memory overflow rate below 0.1% is selected as the working parameter and stored in a fixed manner.

[0047] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit of this application and the scope of protection of this invention, and all of these forms are within the protection scope of this application.

Claims

1. A method for time-synchronized transmission of operating data packets in a dry-type temperature control instrument, characterized in that, Includes the following steps: Step S1: Obtain measurement data at the parameter measurement terminal node, and encapsulate the measurement data with the native timestamp based on the local crystal oscillator count value of the parameter measurement terminal node to construct a data packet to be transmitted containing the physical acquisition time dimension; Step S2: Send the data packet to be transmitted to the aggregation node through the communication link; Step S3: The aggregation node extracts the original timestamp from the data packet to be transmitted, and performs coordinate positioning in the logical memory space according to the original timestamp, and assigns the measurement data to the corresponding spatiotemporal grid node in the preset logical time-series grid sequence, so as to remove the physical dependency between the measurement data and the transmission order of the communication link. Step S4: The aggregation node performs real-time statistical analysis on the data integrity of the logical time-series grid sequence, and activates a grid forced termination command when it detects that the dwell time of the target grid has reached the preset grid lifecycle forced termination threshold; the dwell time is the time difference between the moment when the aggregation node receives the first measurement data packet in the target grid and the current moment. Step S5: According to the grid forced termination command, the dynamic allowable deformation domain is determined for the target grid in the incomplete state. When the determination result meets the preset topology constraint conditions, the measurement data in the adjacent historical grid is extracted to fill the missing parts of the target grid, so as to generate an integrated message with consistent time section and output it to the data processing terminal, and drive the data processing terminal to perform the operation status evaluation of the measured subject.

2. The method for synchronous transmission of operating data packets of a dry-type temperature control instrument according to claim 1, characterized in that, In step S1, the measurement data is encapsulated with a native timestamp. Specifically, at the instant the measurement data is generated, the current crystal oscillator count value of the parameter measurement terminal node is obtained, and the current crystal oscillator count value is embedded in the header of the data packet to be transmitted, so as to establish a data association structure that linearly maps the measurement data to the physical acquisition time.

3. The method for synchronous transmission of operating data packets of a dry-type temperature control instrument according to claim 1, characterized in that, In step S3, the measurement data is assigned to the corresponding spatiotemporal grid node in the preset logical timing grid sequence. This includes: the aggregation node opens a series of continuous logical timing grids with fixed time intervals in the memory space according to the preset data refresh frequency, calculates the time offset of the original timestamp relative to the start time of the logical timing grid sequence, and allocates the multi-channel measurement data belonging to the same physical time section to the logical timing grid with the same sequence number according to the time offset.

4. The method for synchronous transmission of operating data packets in a dry-type temperature control instrument according to claim 1, characterized in that, Step S4 monitors the data completeness of the logical timing grid sequence, specifically including: counting the number of channels received within the logical timing grid and comparing it with the preset total number of channels; if the number of channels equals the total number of channels, the logical timing grid is determined to be in a complete state and the integrated message generation process is triggered.

5. The method for synchronous transmission of operating data packets of a dry-type temperature control instrument according to claim 1, characterized in that, The method for determining the preset grid lifetime forced termination threshold in step S4 is as follows: obtain the theoretical arrival time of the logical time-series grid sequence, add the theoretical arrival time to the jitter redundancy determined by the communication link delay variance, and set the result of the addition as the grid lifetime forced termination threshold.

6. The method for synchronous transmission of operating data packets of a dry-type temperature control instrument according to claim 1, characterized in that, In step S5, a dynamic allowable deformation domain determination is performed, following these rules: the phase change rate of the missing channel data in the target raster in adjacent historical raster cells is calculated, and the allowable deformation threshold is determined according to the following formula: Where δ is the allowable deformation threshold, and λ is a preset environmental disturbance weighting factor. The maximum time delay deviation value detected. For data transmission cycles, if the current delay of the target grid is less than the allowable deformation threshold δ, then the target grid is determined to meet the topological constraints.

7. The method for synchronous transmission of operating data packets of a dry-type temperature control instrument according to claim 6, characterized in that, Data filling for missing bits in the target raster includes: for target raster that meets the topological constraints, extracting the historical measurement value sequence of the missing channel in the adjacent historical raster, generating simulated supplementary values ​​using a forward equal-step interpolation algorithm, and filling the simulated supplementary values ​​into the corresponding missing bits of the target raster to complete message reassembly.

8. The method for synchronous transmission of operating data packets of a dry-type temperature control instrument according to claim 1, characterized in that, The process of generating an integrated message also includes: when generating an integrated message, adding a quality status bit to the measurement data of each channel; if the measurement data is obtained directly through the native timestamp, the quality status bit is marked as a valid value; if the measurement data is obtained through data filling, the quality status bit is marked as a deduced value.

9. The method for synchronous transmission of operating data packets in a dry-type temperature control instrument according to claim 1, characterized in that, The driving data processing terminal performs an operational status assessment of the tested entity, specifically including: the data processing terminal constructs a transient feature evolution model based on the multi-channel measurement data in the integrated message, and when it determines that the arrival frequency of the integrated message meets the preset refresh frequency, it compares the numerical deviation of the measurement data with the preset safety threshold, and outputs an early warning command based on the comparison result.

10. The method for synchronous transmission of operating data packets of a dry-type temperature control instrument according to claim 1, characterized in that, The method also includes: the parameter measurement end node receiving the reference clock signal fed back by the aggregation node, calculating the deviation value between the reference clock signal and the local native timestamp, and adjusting the step frequency of the local crystal oscillator according to the deviation value so that the native timestamp maintains topological convergence with the logical timing grid sequence during the transmission cycle.

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