A turnout switch contact frost and dew formation early warning method, system and storage medium

Abstract

This invention belongs to the field of rail transit and proposes a method, system, and storage medium for early warning of frost and condensation at turnout switch machine contacts. The method includes: acquiring the current temperature value of the environment where the turnout switch machine contacts are located; determining a dew point temperature threshold within a predetermined time range prior to the current moment based on historical environmental data; comparing the current temperature value with the dew point temperature threshold; and generating frost and condensation early warning information based on the comparison result. Based on a sliding time window algorithm, the method analyzes the temperature and relative humidity inside the switch machine to determine and warn of frost and condensation at the switch machine contacts. The method also includes continuously and dynamically updating the dew point temperature threshold. The sliding time window algorithm adapts to seasonal and weather changes, exhibiting strong robustness in dealing with short-term emergencies, providing support for turnout switch machine maintenance, and reducing the operation and maintenance costs of on-site switch machines.

Description

Technical Field

[0001] This invention belongs to the field of rail transit, and specifically relates to a method, system and storage medium for early warning of frost and condensation on the contact points of a turnout switch machine. Background Technology

[0002] The turnout switch machine is a key piece of equipment for realizing the functions of turnout switching, indication, and locking. The contacts are a crucial component of the switch machine's power and indication circuit systems. In areas with large temperature and humidity fluctuations, a significant drop in temperature can lead to an increase in relative humidity inside the switch machine. When the relative humidity reaches 100%, condensation begins. As the temperature further decreases, a large amount of dew enters the switch machine, potentially causing electrical faults and decreased insulation performance at the contacts. The humid environment also accelerates the oxidation and corrosion of metal components, affecting the safe operation of the switch machine. Currently, the maintenance of switch machine contacts in field applications is mainly achieved through manual inspection, lacking effective methods for early warning of frost and condensation on the contacts. Summary of the Invention

[0003] To address the above problems, this invention proposes a method for early warning of frost and condensation on turnout switch machine contacts, the method comprising: Obtain the current temperature value of the environment where the turnout switch machine contacts are located; Based on historical environmental data, determine the dew point temperature threshold within a predetermined time range preceding the current moment. Compare the current temperature value with the dew point temperature threshold; Based on the comparison results, a frost and condensation warning message is generated.

[0004] Furthermore, based on the comparison results, the generation of frost and condensation warning information includes: If the current temperature value is less than the dew point temperature threshold and the current temperature value is greater than 0°C, a condensation warning will be triggered. If the current temperature value is less than the dew point temperature threshold and the current temperature value is less than or equal to 0°C, a frosting warning will be triggered. Otherwise, the status is normal.

[0005] Furthermore, determining the dew point temperature threshold within a predetermined time range preceding the current moment includes: Continuously monitor and record historical environmental data of the turnout switch machine contact environment; The temperature and relative humidity values ​​within the previous sliding time window at the current moment are obtained from the historical environment as a sequence of sample points. Determine the dew point temperature corresponding to the sample point sequence within the sliding window; The dew point temperature threshold is determined based on the statistical values ​​of the dew point temperatures corresponding to the sample points within the sliding window.

[0006] Furthermore, the dew point temperature threshold is determined based on the average dew point temperature of the sample points within the sliding window.

[0007] Furthermore, the method also includes: After a predetermined sampling period, the sequence of sample points within the sliding window is updated; The dew point temperature threshold is determined based on the sequence of sample points within the updated sliding window.

[0008] Furthermore, determining the dew point temperature threshold based on the updated sequence of sample points within the sliding window includes: After a predetermined sampling period, the sequence of sample points within the sliding window is updated; The updated sequence of sample points within the sliding window is processed for outlier data points. The dew point temperature threshold is determined based on the sample point sequence after processing outlier data points.

[0009] The present invention also provides a frost and condensation early warning system for turnout switch machine contacts, the system comprising an acquisition unit, a threshold determination unit, a comparison unit, and an early warning unit. The acquisition unit is configured to acquire the current temperature value of the environment in which the turnout switch machine contacts are located; The threshold determination unit is configured to determine the dew point temperature threshold within a predetermined time range prior to the current moment based on historical environmental data. The comparison unit is configured to compare the current temperature value with the dew point temperature threshold. The early warning unit is configured to generate frost and dew warning information based on the comparison results.

[0010] Furthermore, the early warning unit is configured to determine, based on the comparison results, how to generate frost / dew early warning information, including: If the current temperature value is less than the dew point temperature threshold and the current temperature value is greater than 0°C, a condensation warning will be triggered. If the current temperature value is less than the dew point temperature threshold and the current temperature value is less than or equal to 0°C, a frosting warning will be triggered. Otherwise, the status is normal.

[0011] Furthermore, the threshold determination unit includes a monitoring module, a sequence generation module, a temperature determination module, and a threshold determination module. The monitoring module is configured to continuously monitor and record historical environmental data of the turnout switch machine contact environment; The sequence generation module is configured to obtain the temperature and relative humidity values ​​within the previous sliding time window from the historical environment as a sequence of sample points. The temperature determination module is configured to determine the dew point temperature corresponding to the sample point sequence within the sliding window; The threshold determination module is configured to determine the dew point temperature threshold based on the statistical value of the dew point temperature corresponding to the sample point within the sliding window.

[0012] The present invention also provides a computer storage medium storing one or more instructions that, when executed by one or more computers, cause the one or more computers to perform the method described in the present invention.

[0013] The present invention relates to a method, system, and storage medium for early warning of frost and dew on turnout switch machine contacts. Based on a sliding time window algorithm, the method analyzes the temperature and relative humidity inside the switch machine to determine and warn of frost and dew on the switch machine contacts. The method also includes continuously and dynamically updating the dew point temperature threshold. By adapting to seasonal and weather changes through the sliding time window algorithm, the method has strong robustness in dealing with short-term emergencies, providing support for turnout switch machine maintenance and reducing the operation and maintenance costs of on-site switch machines.

[0014] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the early warning method for frost and condensation at the contact points of a turnout switch machine according to an embodiment of the present invention is shown. Figure 2 A schematic diagram of the frost and condensation early warning system for turnout switch machine contacts in an embodiment of the present invention is shown. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] This invention uses an adaptive algorithm based on a sliding window to determine the condensation and frosting conditions at the internal contact points of a turnout switch machine. Figure 1 This diagram illustrates a flow chart of a method for early warning of frost and condensation at turnout switch machine contacts according to an embodiment of the present invention. Figure 1 The method includes: obtaining the current temperature value of the environment where the turnout switch contact is located; determining the dew point temperature threshold within a predetermined time range before the current moment based on historical environmental data; comparing the current temperature value with the dew point temperature threshold; and generating frost and condensation warning information based on the comparison result.

[0019] Specifically, in this embodiment of the invention, the average dew point temperature within a fixed time period is calculated based on the variation characteristics of the air dew point temperature inside the switch machine. When the current temperature inside the switch machine is less than the average dew point temperature, a condensation warning is given; when the current temperature inside the switch machine is less than 0°C, a frost warning is given.

[0020] Optionally, the generation of frost / condensation warning information based on the comparison results includes: If the current temperature value is less than the dew point temperature threshold and the current temperature value is greater than 0°C, a condensation warning will be triggered. If the current temperature value is less than the dew point temperature threshold and the current temperature value is less than or equal to 0°C, a frosting warning will be triggered. Otherwise, the status is normal.

[0021] Determining the dew point temperature threshold within a predetermined time range preceding the current moment includes: Continuously monitor and record historical environmental data of the turnout switch machine contact environment; The temperature and relative humidity values ​​within the previous sliding time window at the current moment are obtained from the historical environment as a sequence of sample points. Determine the dew point temperature corresponding to the sample point sequence within the sliding window; The dew point temperature threshold is determined based on the statistical values ​​of the dew point temperatures corresponding to the sample points within the sliding window.

[0022] In this embodiment of the invention, the average dew point temperature is calculated based on a sliding window algorithm. The data within the sliding window includes the temperature and relative humidity values ​​inside the switch machine collected within a fixed time period. The sliding window is continuously updated over time while maintaining a constant length. Optionally, in this embodiment, the fixed time period is the temperature and relative humidity values ​​inside the switch machine collected within the previous 24 hours.

[0023] It should be noted that, in this embodiment of the invention, the length of the sliding time window is not specifically limited.

[0024] In this embodiment of the invention, the dew point temperature threshold is determined based on the average dew point temperature of the sample points within the sliding window. The dew point temperature threshold is obtained by averaging multiple sample points within the sliding window.

[0025] Optionally, in this embodiment of the invention, the dew point temperature threshold can also be determined based on the maximum value of the dew point temperature corresponding to the sample point within the sliding window.

[0026] The dew point temperature threshold is selected from the maximum dew point temperature among the sample points within the sliding window. It defines the "most humid" state the environment has experienced within the sliding window period, i.e., the dew point temperature corresponding to the moment with the highest risk of condensation and frost. In this embodiment of the invention, by setting the dew point temperature threshold at the historical high, once the current temperature value approaches the maximum dew point temperature among the sample points within the sliding window, it indicates that the ambient humidity has reached the level most prone to condensation recently, and the system will issue an early warning. This covers possible short-term high-humidity weather within the time period, ensuring that the equipment is protected even under the worst historical conditions, greatly reducing the risk of missed reports.

[0027] In this embodiment of the invention, the method further includes: updating the sample point sequence within the sliding window after a predetermined sampling period; and determining the dew point temperature threshold based on the updated sample point sequence within the sliding window. As time progresses, the system dynamically updates based on the latest environmental data, enabling the early warning system to continuously track environmental changes and resulting in more accurate warnings. By removing old data and adding new data, the system ensures that the data used to calculate the threshold always reflects the recent environmental conditions, avoiding judgment lag caused by historically outdated data.

[0028] To significantly improve the system's stability and robustness, prevent false alarms, and make the alarm results more accurate and reliable, in this embodiment of the invention, determining the dew point temperature threshold based on the updated sample point sequence within the sliding window includes: updating the sample point sequence within the sliding window after a predetermined sampling period; processing outlier data points in the updated sample point sequence within the sliding window; and determining the dew point temperature threshold based on the processed sample point sequence. The algorithm dilutes (weakens) the influence of outliers, avoiding excessive interference with the threshold; the threshold is calculated based on the purified data sequence, which better represents the true and continuous state of the environment.

[0029] In this embodiment of the invention, an outlier dilution algorithm is applied so that brief, sudden events only exist as a segment of data in the data window. As the data is continuously updated and iterated, outliers are gradually diluted and removed from the window, ensuring system stability and robustness.

[0030] Optionally, the outlier dilution algorithm may be selected from one of the following: a dilution method based on weight adjustment, a dilution method based on robust statistics, a dilution method based on window iteration and update, and a dilution method based on clustering or binning. In this embodiment of the invention, no specific outlier dilution algorithm type is specified.

[0031] In this embodiment of the invention, the dew point temperature within a certain range before the current moment is used as a threshold and compared with the current temperature to provide an early warning of condensation and frost. The following detailed description of the turnout switch machine contact frost and condensation early warning method of the present invention is provided through a specific embodiment: Step S1: Obtain the temperature and relative humidity values ​​within the previous sliding time window from the historical environment as a sample point sequence. Specifically, in this embodiment of the invention, for the collected temperature value T and relative humidity value RH, (T, RH) is used as a sample point. Along the time axis, the sample points are numbered at sampling intervals, and the sample point numbers are positive natural numbers. Assuming the current sample point number is N, and the sliding window sample is the set of all sample points numbered from M to N (N>M), the current sample point sequence set is represented as: (1) Step S2: Determine the dew point temperature corresponding to the sample point sequence within the sliding window. Specifically, the dew point temperature is determined using the Magnus formula. The following explanation describes the calculation of the dew point temperature. It should be noted that the embodiments of the present invention do not impose specific limitations on the calculation method of the dew point temperature.

[0032] Step S21: Determine the actual water vapor pressure The actual water vapor pressure E (hPa / hPa) is expressed as: (2) In equation (2), Es(T) represents the saturated water vapor pressure (hPa / hPa), RH represents the relative humidity (%), and the saturated water vapor pressure Es(T) is expressed as: (3) In equation (3), T represents the current temperature (°C).

[0033] Step S22: Determine the dew point temperature Correlation function of dew point temperature Td Represented as: (4) In equation (4), the values ​​of a and b are determined according to the properties of the medium. In the implementation of this invention, for frost and condensation, when the medium is water, a≈17.27 and b≈237.3.

[0034] Specifically, based on the relevant functional relationship of dew point temperature Td in formula (4), the dew point temperature Td corresponding to sample point i within the sliding window can be calculated. i (i is taken sequentially from M to N), the dew point temperature Td corresponding to sample point i within the sliding window. i Represented as: (5) Step S3: Determine the dew point temperature threshold based on the statistical values ​​of the dew point temperatures corresponding to the sample points within the sliding window. In this embodiment of the invention, the dew point temperature threshold at the current moment is determined by the average dew point temperature corresponding to the sliding window samples. N Represented as: (6) In equation (6), N-M+1 represents the number of sample points within the sliding window.

[0035] Step S4: Compare the current temperature value with the dew point temperature threshold, and generate frost / dew early warning information based on the comparison result. Based on the current temperature T N With dew point temperature threshold Threshold N Perform judgment and warning Alert N : (7) If the current temperature value is T N <Dew point temperature threshold Threshold N And the current temperature value T N If the temperature is >0℃, a condensation warning will be triggered; If the current temperature value is T N <Dew point temperature threshold Threshold N And the current temperature value T N If the temperature is ≤0℃, a frosting warning will be triggered; Otherwise, the status is normal.

[0036] Step S5: Update the sample point sequence within the sliding window. When time has elapsed through k sampling periods, the sequence of sample points within the sliding window is updated as follows: (8) The new dew point temperature threshold is .

[0037] This invention also provides a frost and condensation early warning system for turnout switch machine contacts. Figure 2This diagram illustrates the structure of a turnout switch machine contact frost and condensation early warning system according to an embodiment of the present invention. Figure 2 The system includes an acquisition unit, a threshold determination unit, a comparison unit, and an early warning unit. The acquisition unit is configured to acquire the current temperature value of the environment in which the turnout switch machine contacts are located; The threshold determination unit is configured to determine the dew point temperature threshold within a predetermined time range prior to the current moment based on historical environmental data. The comparison unit is configured to compare the current temperature value with the dew point temperature threshold. The early warning unit is configured to generate frost and dew warning information based on the comparison results.

[0038] Specifically, the early warning unit is configured to determine, based on the comparison results, how to generate frost / dew early warning information, including: If the current temperature value is less than the dew point temperature threshold and the current temperature value is greater than 0°C, a condensation warning will be triggered. If the current temperature value is less than the dew point temperature threshold and the current temperature value is less than or equal to 0°C, a frosting warning will be triggered. Otherwise, the status is normal.

[0039] Optionally, in this embodiment of the invention, the threshold determination unit includes a monitoring module, a sequence generation module, a temperature determination module, and a threshold determination module. The monitoring module is configured to continuously monitor and record historical environmental data of the turnout switch machine contact environment; The sequence generation module is configured to obtain the temperature and relative humidity values ​​within the previous sliding time window from the historical environment as a sequence of sample points. The temperature determination module is configured to determine the dew point temperature corresponding to the sample point sequence within the sliding window; The threshold determination module is configured to determine the dew point temperature threshold based on the statistical value of the dew point temperature corresponding to the sample point within the sliding window.

[0040] Optionally, in this embodiment of the invention, the turnout switch contact frost and dew early warning system further includes an update unit, which is configured to update the sample point sequence within the sliding window after a predetermined sampling period; and determine the dew point temperature threshold based on the updated sample point sequence within the sliding window.

[0041] Specifically, the update unit includes an update module, an exception handling module, and a first determination module. The update module is configured to update the sequence of sample points within the sliding window after a predetermined sampling period. The anomaly handling module is configured to process abnormal data points in the updated sliding window sequence of sample points. The first determining module is configured to determine the dew point temperature threshold based on the sample point sequence after processing the abnormal data points.

[0042] This invention also provides a computer storage medium storing one or more instructions, which, when executed by one or more computers, cause the one or more computers to implement the turnout switch contact frost and condensation early warning method of this invention.

[0043] It should be noted that, in this embodiment of the invention, the computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the method for early warning of frost and condensation on the turnout switch machine contacts. Specifically, the computer-readable storage medium includes, but is not limited to, volatile memory and / or non-volatile memory. The volatile memory may include random access memory (RAM) and / or cache memory, etc. The non-volatile memory may include read-only memory (ROM), hard disk, flash memory, optical disk, magnetic disk, etc.

[0044] The present invention relates to a method, system, and storage medium for early warning of frost and dew on turnout switch machine contacts. Based on a sliding time window algorithm, the method analyzes the temperature and relative humidity inside the switch machine to determine and warn of frost and dew on the switch machine contacts. The method also includes continuously and dynamically updating the dew point temperature threshold. By adapting to seasonal and weather changes through the sliding time window algorithm, the method has strong robustness in dealing with short-term emergencies, providing support for turnout switch machine maintenance and reducing the operation and maintenance costs of on-site switch machines.

[0045] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for early warning of frost and condensation at the contact points of a turnout switch machine, characterized in that, The method includes: Obtain the current temperature value of the environment where the turnout switch machine contacts are located; Based on historical environmental data, determine the dew point temperature threshold within a predetermined time range preceding the current moment. Compare the current temperature value with the dew point temperature threshold; Based on the comparison results, a frost and condensation warning message is generated.

2. The method for early warning of frost and condensation at turnout switch machine contacts according to claim 1, characterized in that, Based on the comparison results, the generated frost and condensation early warning information includes: If the current temperature value is less than the dew point temperature threshold and the current temperature value is greater than 0°C, a condensation warning will be triggered. If the current temperature value is less than the dew point temperature threshold and the current temperature value is less than or equal to 0°C, a frosting warning will be triggered. Otherwise, the status is normal.

3. The method for early warning of frost and condensation at turnout switch machine contacts according to claim 1 or 2, characterized in that, Determining the dew point temperature threshold within a predetermined time range preceding the current moment includes: Continuously monitor and record historical environmental data of the turnout switch machine contact environment; The temperature and relative humidity values ​​within the previous sliding time window at the current moment are obtained from the historical environment as a sequence of sample points. Determine the dew point temperature corresponding to the sample point sequence within the sliding window; The dew point temperature threshold is determined based on the statistical values ​​of the dew point temperatures corresponding to the sample points within the sliding window.

4. The method for early warning of frost and condensation at turnout switch machine contacts according to claim 3, characterized in that, The dew point temperature threshold is determined based on the average dew point temperature of the sample points within the sliding window.

5. The method for early warning of frost and condensation at turnout switch machine contacts according to claim 1 or 2, characterized in that, The method further includes: After a predetermined sampling period, the sequence of sample points within the sliding window is updated; The dew point temperature threshold is determined based on the sequence of sample points within the updated sliding window.

6. The method for early warning of frost and condensation at turnout switch machine contacts according to claim 5, characterized in that, Determining the dew point temperature threshold based on the updated sequence of sample points within the sliding window includes: After a predetermined sampling period, the sequence of sample points within the sliding window is updated; The updated sequence of sample points within the sliding window is processed for outlier data points. The dew point temperature threshold is determined based on the sample point sequence after processing outlier data points.

7. A frost and condensation early warning system for turnout switch machine contacts, characterized in that, The system includes an acquisition unit, a threshold determination unit, a comparison unit, and an early warning unit. The acquisition unit is configured to acquire the current temperature value of the environment in which the turnout switch machine contacts are located; The threshold determination unit is configured to determine the dew point temperature threshold within a predetermined time range prior to the current moment based on historical environmental data. The comparison unit is configured to compare the current temperature value with the dew point temperature threshold. The early warning unit is configured to generate frost and dew warning information based on the comparison results.

8. The turnout switch machine contact frost and condensation early warning system according to claim 7, characterized in that, The early warning unit is configured to determine, based on the comparison results, to generate frost / condensation early warning information, including: If the current temperature value is less than the dew point temperature threshold and the current temperature value is greater than 0°C, a condensation warning will be triggered. If the current temperature value is less than the dew point temperature threshold and the current temperature value is less than or equal to 0°C, a frosting warning will be triggered. Otherwise, the status is normal.

9. The turnout switch machine contact frost and condensation early warning system according to claim 7 or 8, characterized in that, The threshold determination unit includes a monitoring module, a sequence generation module, a temperature determination module, and a threshold determination module. The monitoring module is configured to continuously monitor and record historical environmental data of the turnout switch machine contact environment; The sequence generation module is configured to obtain the temperature and relative humidity values ​​within the previous sliding time window from the historical environment as a sequence of sample points. The temperature determination module is configured to determine the dew point temperature corresponding to the sample point sequence within the sliding window; The threshold determination module is configured to determine the dew point temperature threshold based on the statistical value of the dew point temperature corresponding to the sample point within the sliding window.

10. A computer storage medium, characterized in that, The computer storage medium stores one or more instructions, which, when executed by one or more computers, cause the one or more computers to perform the method of any one of claims 1-6.

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