Drainage well lid burying judgment method and system

Abstract

The invention provides a drainage well lid burying judgment method and system. The drainage well lid burying judgment method comprises the steps that light intensity data, signal intensity data, temperature data and oxygen concentration data in a well chamber are collected through a monitoring terminal of a target well lid; based on the light intensity data, performing comparison under a preset reference light intensity value to obtain a first burying judgment result; a second burying judgment result is obtained through comparison under a preset reference signal intensity value based on the signal intensity data; a third burying judgment result is obtained through comparison under a preset reference temperature value based on the temperature data; based on the oxygen concentration data, performing comparison under a preset reference oxygen concentration value to obtain a fourth burying judgment result; based on the first burying judgment result, the second burying judgment result, the third burying judgment result and the fourth burying judgment result, obtaining a burying state under a preset burying judgment algorithm; and if the burying state is determined to be buried, generating burying alarm information. According to the invention, well cover burying determination is carried out through cooperation of multi-modal data, and the accuracy of well cover burying determination is improved.

Description

Technical Field

[0001] This invention belongs to the field of manhole cover condition detection technology, and in particular relates to a method and system for determining the burial of drainage manhole covers. Background Technology

[0002] Drainage manhole covers are an important part of urban infrastructure. If drainage manhole covers are buried, they will seriously hinder drainage and cause local flooding. Traditional methods of determining whether drainage manhole covers are buried rely on regular manual inspections, which has the problem of low efficiency in determining whether manhole covers are buried.

[0003] To address these issues, existing technologies utilize light sensors to collect light intensity data. If the manhole cover is not covered for several consecutive days based on the light intensity data, it is determined that the manhole cover is buried. However, in real-world scenarios, burying a manhole cover is a gradual process. In the initial stages of burial, there may still be gaps allowing light to penetrate, but the normal drainage function of the drainage manhole cover is already obstructed. Existing light sensors cannot detect burial in the initial stages. Furthermore, existing technologies lack early warning capabilities for the initial burial state of manhole covers, such as decreased signal strength, oxygen concentration, and abnormal temperature changes. They only determine that the manhole cover is buried when it is completely covered, greatly reducing the accuracy of manhole cover burial determination. Summary of the Invention

[0004] The present invention aims to provide a method and system for determining whether a drainage well cover is buried, so as to solve the above-mentioned technical problems and improve the accuracy of determining whether a well cover is buried.

[0005] To address the aforementioned technical problems, this invention provides a method for determining the burial status of drainage well covers, comprising the following steps: Data on light intensity, signal strength, temperature, and oxygen concentration inside the manhole are collected through the monitoring terminal of the target manhole cover. Based on the light intensity data, a comparison is made with a preset benchmark light intensity value to obtain a first burial determination result; Based on the signal strength data, a second burial determination result is obtained by comparing it with a preset reference signal strength value. Based on the temperature data, a comparison is made at a preset reference temperature value to obtain a third burial determination result; Based on the oxygen concentration data, a comparison is made with a preset benchmark oxygen concentration value to obtain the fourth burial determination result; Based on the first burial determination result, the second burial determination result, the third burial determination result, and the fourth burial determination result, the burial status is obtained under the preset burial determination algorithm; If the burial status is confirmed to be "buried", then a burial alarm message corresponding to the target manhole cover is generated.

[0006] In the aforementioned scheme, light intensity data is mainly affected by physical obstruction, signal strength data is mainly affected by the propagation environment, temperature data is mainly affected by heat exchange efficiency, and oxygen concentration data is mainly affected by air circulation. Therefore, this scheme uses light intensity data, signal strength data, temperature data, and oxygen concentration data to perform subsequent manhole cover burial determination, which can comprehensively identify abnormal states such as decreased oxygen concentration and abnormal temperature changes in the early stage of manhole cover burial, thus improving the accuracy of subsequent manhole cover burial determination. Furthermore, this scheme obtains the burial status based on the first, second, third, and fourth burial determination results under a preset burial determination algorithm, which can avoid the problem of incorrect generation of burial alarm information due to misjudgment of a single burial determination result in existing technologies, thereby improving the accuracy of manhole cover burial determination.

[0007] Furthermore, the step of collecting light intensity data, signal strength data, temperature data, and oxygen concentration data inside the manhole through the monitoring terminal of the target manhole cover includes: obtaining the current time and confirming that the current time is the preset monitoring sampling time, and then collecting light intensity data, signal strength data, temperature data, and oxygen concentration data inside the manhole through the monitoring terminal of the target manhole cover.

[0008] Further, the step of confirming that the burial status is "buried" and generating burial alarm information corresponding to the target manhole cover also includes: confirming that the burial status is not "buried" and then performing a baseline value adjustment step to obtain a baseline light intensity value, a baseline signal intensity value, a baseline temperature value, and a baseline oxygen concentration value; the baseline value adjustment step includes: acquiring a historical normal light intensity set, and comparing the light intensity data and the historical normal light intensity set to obtain a minimum light intensity value, and using the minimum light intensity value as the baseline light intensity value; acquiring a historical normal signal intensity set, and comparing the signal intensity data and the historical normal signal intensity set to obtain a minimum signal intensity value, and using the minimum signal intensity value as the baseline signal intensity value; acquiring a historical normal temperature set, and averaging the temperature data and the historical normal temperature set to obtain an average temperature value, and using the average temperature value as the baseline temperature value; acquiring a historical normal oxygen concentration set, and averaging the oxygen concentration data and the historical oxygen concentration set to obtain an average oxygen concentration value, and using the average oxygen concentration value as the baseline oxygen concentration value.

[0009] In the above scheme, light intensity data is compared with historical normal light intensity data to obtain the minimum light intensity value, which is then used as the baseline light intensity value, reducing misjudgments caused by overcast weather. Similarly, signal intensity data is compared with historical normal signal intensity data to obtain the minimum signal intensity value, which is then used as the baseline signal intensity value, reducing misjudgments caused by changes in the scene environment. Temperature data is compared with the average of historical normal temperature sets as the baseline temperature value, and oxygen concentration data is compared with the average of historical normal oxygen concentration sets as the baseline oxygen concentration value, ensuring the real-time nature of the baseline values ​​and thus improving the accuracy of the target manhole cover burial determination. The environment inside the drainage manhole cover is not fixed; therefore, when this scheme confirms that the burial status is not that the manhole cover is buried, it actively adjusts the baseline light intensity value, baseline signal intensity value, baseline temperature value, and baseline oxygen concentration value. This allows the baseline values ​​for burial determination to be updated and calibrated over a long period of environmental evolution, avoiding the problem of increased false alarm rates in existing technologies due to baseline values ​​not adapting to environmental changes, and ensuring good accuracy in manhole cover burial determination even with environmental changes.

[0010] Further, the step of comparing the light intensity data with a preset benchmark light intensity value to obtain a first burial determination result includes: obtaining the most recent light burial alarm time and using the light burial alarm time as a historical light burial alarm time; calculating the difference based on the light intensity data under a preset benchmark intensity value to obtain a light intensity deviation value; confirming that the light intensity deviation value is greater than a preset light intensity deviation threshold, then obtaining the time corresponding to the light intensity data as the current light burial alarm time; confirming that the difference between the historical light burial alarm time and the current light burial alarm time is greater than a preset interval threshold, then generating a first burial determination result; the first burial determination result is that the light is buried.

[0011] In the above scheme, the first burial determination result is generated when the difference between the historical light burial alarm time and the current light burial alarm time is less than a preset interval threshold. This effectively distinguishes between momentary shading caused by temporary vehicle parking or pedestrians briefly stopping, as well as periodic shadows caused by buildings or trees at fixed times of the day and dark scenes caused by day-night alternation. Furthermore, this scheme only generates the first burial determination result when the difference between the light burial alarm times is greater than the set preset interval threshold, avoiding the problem of frequent false alarms of manhole cover burial caused by common short-term interference, improving the reliability of the first burial determination result, and thus improving the accuracy of manhole cover burial determination.

[0012] Further, the step of comparing the signal strength data with a preset reference signal strength value to obtain a second burial determination result includes: calculating the difference based on the signal strength data with a preset reference signal strength value to obtain a signal strength difference; confirming that the signal strength difference is less than a preset signal strength deviation threshold, then generating a second burial determination result; the second burial determination result indicates that the signal is buried.

[0013] In the above scheme, since the propagation environment of wireless signals changes after the drainage well cover is buried, the signal penetration loss is significantly attenuated. Therefore, this scheme compares the signal strength difference with the preset signal strength deviation threshold, and ensures that only when the signal strength deviates significantly from the preset reference signal strength value can the second burial judgment result be directly generated. This can effectively distinguish the daily fluctuations caused by temporary obstacles, base station load, reflections from surrounding buildings, etc., and reduce the false alarm rate of well cover burial.

[0014] Further, the step of comparing the temperature data with a preset benchmark temperature value to obtain a second burial determination result includes: obtaining the most recent temperature burial alarm time and using the temperature burial alarm time as a historical temperature burial alarm time; calculating the difference based on the temperature data at the preset benchmark temperature value to obtain a temperature difference; confirming that the temperature difference is greater than a preset temperature deviation threshold, then obtaining the time corresponding to the temperature data as the current temperature burial alarm time; confirming that the difference between the historical temperature burial alarm time and the current temperature burial alarm time is greater than a preset interval threshold, then generating a third burial determination result; the third burial determination result is that the area is buried.

[0015] In the above scheme, because the internal heat exchange environment of the drainage manhole cover becomes sealed after it is buried, the temperature inside the manhole cover deviates significantly from the external environment over a long period of time. Therefore, this scheme compares the temperature difference with a preset temperature deviation threshold, and ensures that a third burial determination result is generated only when the temperature significantly deviates from the preset reference temperature value. This effectively distinguishes normal temperature fluctuations caused by day-night cycles or short-term weather changes, reducing the false alarm rate of manhole cover burial. Furthermore, this scheme can determine the duration of the severe deviation of the temperature data from the reference temperature value by using the time difference between the historical temperature burial alarm time and the current temperature burial alarm time. Only after the duration exceeds the interval threshold is a third burial determination result generated. Therefore, this scheme can eliminate the interference of instantaneous heat sources on the manhole cover burial determination, improve the reliability of the third burial determination result, and thus improve the accuracy of manhole cover burial determination.

[0016] Further, the step of comparing the oxygen concentration data with a preset benchmark oxygen concentration value to obtain a fourth burial determination result includes: obtaining the most recent oxygen concentration burial alarm time and using the oxygen concentration burial alarm time as the historical oxygen concentration burial alarm time; calculating the difference based on the oxygen concentration data at the preset benchmark oxygen concentration value to obtain an oxygen concentration difference; confirming that the oxygen concentration difference is greater than a preset oxygen concentration deviation threshold, then obtaining the time corresponding to the oxygen concentration data as the current oxygen concentration burial alarm time; confirming that the difference between the historical oxygen concentration burial alarm time and the current oxygen concentration burial alarm time is greater than a preset interval threshold, then generating a fourth burial determination result; the fourth burial determination result is that the area has been buried.

[0017] In the above scheme, when a drainage well cover is buried, its drainage holes are blocked, preventing normal air exchange between the inside and outside of the well. Oxygen inside the well cover is continuously consumed due to various oxidation reactions or microbial activity, resulting in a significant decrease in oxygen concentration. Therefore, this scheme, after confirming that the oxygen concentration data is not greater than a preset benchmark oxygen concentration value, and further confirming that the difference between the historical oxygen concentration burial alarm time and the current oxygen concentration burial alarm time is greater than a preset interval threshold, generates a fourth burial determination result. This improves the reliability of the fourth burial determination result, thereby increasing the accuracy of well cover burial determination.

[0018] Further, the step of obtaining the burial status based on the first burial determination result, the second burial determination result, the third burial determination result, and the fourth burial determination result, under a preset burial determination algorithm, includes: confirming that at least one of the first burial determination result, the second burial determination result, the third burial determination result, and the fourth burial determination result is buried; then, after a preset number of continuous samplings, collecting a light intensity dataset, a signal intensity dataset, a temperature dataset, and an oxygen concentration dataset; comparing the light intensity dataset with a preset reference light intensity value to obtain a first burial determination result; comparing the signal intensity dataset with a preset reference signal intensity value to obtain a second burial determination result; comparing the temperature dataset with a preset reference temperature value to obtain a third burial determination result; comparing the oxygen concentration dataset with a preset reference oxygen concentration value to obtain a fourth burial determination result; confirming that at least one of the first burial determination result, the second burial determination result, the third burial determination result, and the fourth burial determination result is buried, then generating a burial status; the burial status is "buried".

[0019] In the above scheme, when at least one of the first, second, third, and fourth burial determination results indicates that the manhole cover is buried, this scheme continuously collects multiple sets of light intensity data, signal intensity data, temperature data, and oxygen concentration data after a preset number of continuous samplings. This forms light intensity datasets, signal intensity datasets, temperature datasets, and oxygen concentration datasets. These datasets are then compared again to obtain the corresponding first, second, third, and fourth burial determination results. By continuously observing and verifying the light intensity data, signal intensity data, temperature data, and oxygen concentration data, this scheme effectively reduces misjudgments of manhole cover burial caused by instantaneous sensor noise or short-term environmental interference, ensuring high reliability of the generated burial status and thus improving the accuracy of manhole cover burial determination.

[0020] This invention also provides a drainage well cover burial determination system for implementing a drainage well cover burial determination method as described in any of the preceding claims, comprising: a multimodal data acquisition module for acquiring light intensity data, signal strength data, temperature data, and oxygen concentration data inside the well chamber via a monitoring terminal of the target well cover; a light burial determination module for comparing the light intensity data with a preset reference light intensity value to obtain a first burial determination result; a signal burial determination module for comparing the signal strength data with a preset reference signal strength value to obtain a second burial determination result; and a temperature burial determination module. The system includes a temperature determination module, which compares the temperature data with a preset reference temperature value to obtain a third burial determination result; an oxygen concentration burial determination module, which compares the oxygen concentration data with a preset reference oxygen concentration value to obtain a fourth burial determination result; a burial status confirmation module, which determines the burial status based on the first burial determination result, the second burial determination result, the third burial determination result, and the fourth burial determination result using a preset burial determination algorithm; and a burial alarm module, which generates a burial alarm message corresponding to the target manhole cover if the burial status is confirmed to be burial.

[0021] Furthermore, the multimodal data acquisition module is used to collect light intensity data, signal intensity data, temperature data, and oxygen concentration data inside the manhole through the monitoring terminal of the target manhole cover, including: obtaining the current time and confirming that the current time is the preset monitoring sampling time, and then collecting light intensity data, signal intensity data, temperature data, and oxygen concentration data inside the manhole through the monitoring terminal of the target manhole cover.

[0022] In the above-described scheme, the subsequent manhole cover burial determination process is based on light intensity data, signal intensity data, temperature data, and oxygen concentration data. This comprehensively identifies abnormal states such as decreased oxygen concentration and abnormal temperature changes in the early stages of manhole cover burial, improving the accuracy of subsequent manhole cover burial determination. Furthermore, this scheme obtains the burial status based on the first, second, third, and fourth burial determination results under a preset burial determination algorithm. This avoids the problem of incorrect generation of burial alarm information due to misjudgment of a single burial determination result in existing technologies, thus improving the accuracy of manhole cover burial determination. Attached Figure Description

[0023] Figure 1 A flowchart illustrating the steps of a method for determining the burial of a drainage well cover, as provided in an embodiment of the present invention; Figure 2 A reverse view of a drainage well cover for installing a monitoring terminal, provided as an embodiment of the present invention; Figure 3 A front view of a drainage well cover for installing a monitoring terminal, provided in an embodiment of the present invention; Figure 4 A side sectional view of a drainage well cover for installing a monitoring terminal, provided in an embodiment of the present invention; Figure 5 This is a side sectional view of the connection between a monitoring terminal and a drainage well cover provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of a drainage well cover burial determination system provided in an embodiment of the present invention. Detailed Implementation

[0024] 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, and 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.

[0025] Please see Figure 1 This embodiment provides a method for determining whether a drainage well cover is buried, including the following steps: Step S1: Collect light intensity data, signal strength data, temperature data, and oxygen concentration data inside the manhole through the monitoring terminal of the target manhole cover; Step S2: Based on the light intensity data, compare it with a preset reference light intensity value to obtain the first burial determination result; Step S3: Based on the signal strength data, compare it with a preset reference signal strength value to obtain a second burial determination result; Step S4: Based on the temperature data, compare it with a preset reference temperature value to obtain a third burial determination result; Step S5: Based on the oxygen concentration data, compare it with the preset benchmark oxygen concentration value to obtain the fourth burial determination result; Step S6: Based on the first burial determination result, the second burial determination result, the third burial determination result, and the fourth burial determination result, the burial status is obtained under the preset burial determination algorithm; Step S7: If the burial status is confirmed to be "buried", then generate the burial alarm information corresponding to the target manhole cover.

[0026] In the above embodiments, light intensity data is mainly affected by physical obstruction, signal strength data is mainly affected by the propagation environment, temperature data is mainly affected by heat exchange efficiency, and oxygen concentration data is mainly affected by air circulation. Therefore, this embodiment uses light intensity data, signal strength data, temperature data, and oxygen concentration data to perform subsequent manhole cover burial determination, which can comprehensively identify abnormal states such as decreased oxygen concentration and abnormal temperature changes in the early stage of manhole cover burial, thus improving the accuracy of subsequent manhole cover burial determination. Furthermore, this embodiment obtains the burial status based on the first, second, third, and fourth burial determination results under a preset burial determination algorithm, which can avoid the problem of incorrect generation of burial alarm information due to misjudgment of a single burial determination result in the prior art, thereby improving the accuracy of manhole cover burial determination.

[0027] It should be noted that light intensity data is primarily affected by physical obstruction. The strength of light intensity directly depends on whether there are objects blocking the light's path above the manhole cover. Therefore, light intensity data is extremely sensitive to changes in the brightness of the external environment, but it is not sensitive to oxygen concentration and temperature inside the manhole. Signal strength data is significantly affected by the environment, especially when the manhole cover is completely covered by road materials such as concrete or asphalt. The enclosed environment inside the manhole has a significant attenuation effect on the wireless signal. Temperature data is mainly affected by the heat exchange efficiency between the inside and outside of the manhole cover. When the manhole cover is buried, especially when it is covered by insulating materials such as soil or garbage, heat exchange between the inside and outside of the manhole cover is hindered, leading to heat accumulation and a significant increase in temperature. Oxygen concentration data is mainly affected by air circulation. Because the drainage well cover itself has drainage holes, the inside of the drainage well cover can communicate with the atmosphere through the drainage holes, and the oxygen concentration inside the cover is basically the same as that in the atmosphere. However, if the vent holes are blocked by the buried material and the well cover is buried, the air inside and outside the well cannot be exchanged normally. The oxygen inside the well cover will be continuously consumed by various oxidation reactions or microbial activities, thus significantly reducing the oxygen concentration.

[0028] In one embodiment, the monitoring terminal for the target manhole cover integrates a light sensor, a signal sensor, a temperature sensor, and an oxygen concentration sensor. The light sensor is used to collect light intensity data inside the manhole, the signal sensor is used to collect signal intensity data inside the manhole, the temperature sensor is used to collect temperature data inside the manhole, and the oxygen concentration sensor is used to collect oxygen concentration data inside the manhole.

[0029] In one embodiment, the drainage well cover on which the monitoring terminal is installed is as follows: Figure 2 , 3 As shown in Figure 4, and the side cross-sectional view of the connection between the monitoring terminal and the drainage well cover is as follows. Figure 5 As shown, the drainage well cover for installing the monitoring terminal includes: a drainage hole 1, a monitoring terminal 2, a well cover 3, tempered glass 4, internal threads 5, and ring bolts 6. In this embodiment, the well cover 3 is made of ductile iron, and the central area of ​​the well cover 3 is inlaid with tempered glass 4, which has high impact and bending strength. In this embodiment, the tempered glass 4 is made of a completely transparent material and serves as the main light transmission channel. In this embodiment, 20 drainage holes 1 with a diameter of 30mm are set around the edge of the well cover 3, and the drainage holes 1 serve as channels for light transmission and ventilation. In this embodiment, the monitoring terminal 2 is installed inside the well chamber, and the outer shell of the monitoring terminal 2 is made of a completely transparent shell. The monitoring terminal 2 is installed on the tempered glass 4 in the central area of ​​the well cover 3 using internal threads 5 and ring bolts 6.

[0030] In one embodiment, the resulting burial alarm information can be uploaded to an IoT platform via an NB-IoT network to display the burial status of the manhole cover, and relevant personnel can be notified through a web management platform, APP push notifications, or other means. Furthermore, the burial alarm information can be used to construct an electronic map interface that displays the real-time location and burial status of all drainage manhole covers, enabling real-time monitoring of the burial status of drainage manhole covers and improving public safety management and operational efficiency.

[0031] Furthermore, the step of collecting light intensity data, signal strength data, temperature data, and oxygen concentration data inside the manhole through the monitoring terminal of the target manhole cover includes: obtaining the current time and confirming that the current time is the preset monitoring sampling time, and then collecting light intensity data, signal strength data, temperature data, and oxygen concentration data inside the manhole through the monitoring terminal of the target manhole cover.

[0032] Preferably, the preset monitoring sampling time is 12:00 noon. 12:00 noon is the time of day with the highest solar altitude angle and the strongest and most stable ambient light. Sampling at 12:00 noon ensures that the collected light intensity data represents the maximum light intensity of the day when the manhole cover is not buried. Furthermore, at 12:00 noon, the surface temperature reaches its maximum for the day, resulting in higher heat exchange efficiency between the inside and outside of the manhole cover. Therefore, collecting temperature data during this period effectively captures anomalies in the temperature difference between the manhole cover and the external environment, making the obtained temperature difference more representative and improving the reliability of the third burial determination result.

[0033] Further, the step of confirming that the burial status is "buried" and generating burial alarm information corresponding to the target manhole cover also includes: confirming that the burial status is not "buried" and then performing a baseline value adjustment step to obtain a baseline light intensity value, a baseline signal intensity value, a baseline temperature value, and a baseline oxygen concentration value; the baseline value adjustment step includes: acquiring a historical normal light intensity set, and comparing the light intensity data and the historical normal light intensity set to obtain a minimum light intensity value, and using the minimum light intensity value as the baseline light intensity value; acquiring a historical normal signal intensity set, and comparing the signal intensity data and the historical normal signal intensity set to obtain a minimum signal intensity value, and using the minimum signal intensity value as the baseline signal intensity value; acquiring a historical normal temperature set, and averaging the temperature data and the historical normal temperature set to obtain an average temperature value, and using the average temperature value as the baseline temperature value; acquiring a historical normal oxygen concentration set, and averaging the oxygen concentration data and the historical oxygen concentration set to obtain an average oxygen concentration value, and using the average oxygen concentration value as the baseline oxygen concentration value.

[0034] In the above embodiments, comparing the light intensity data with historical normal light intensity data to obtain the minimum light intensity data, and using the minimum light intensity value as the benchmark light intensity value, can reduce misjudgments caused by cloudy weather; comparing the signal strength data with historical normal signal strength data to obtain the minimum signal strength data, and using the minimum signal strength value as the benchmark signal strength value, can reduce misjudgments caused by daily fluctuations due to temporary obstacles, base station load, reflections from surrounding buildings, etc.; using the temperature data and the average of historical normal temperature sets as the benchmark temperature value, and using the oxygen concentration data and the average of historical normal oxygen concentration sets as the benchmark oxygen concentration value, ensures the real-time nature of the benchmark values, thereby improving the accuracy of the target manhole cover burial determination. The environment inside the drainage well cover is not fixed. Therefore, in this embodiment, when it is confirmed that the burial status is not that the well is buried, the reference light intensity value, reference temperature value, and reference oxygen concentration value will be actively adjusted so that the reference value for burial determination can be updated and calibrated with the long-term evolution of the environment. This avoids the problem of the existing technology where the reference value is not adapted to the environmental evolution, which leads to an increase in the false alarm rate of burial determination. This ensures that the burial determination of the well cover has a good accuracy rate when the environment changes.

[0035] Further, the step of comparing the light intensity data with a preset benchmark light intensity value to obtain a first burial determination result includes: obtaining the most recent light burial alarm time and using the light burial alarm time as a historical light burial alarm time; calculating the difference based on the light intensity data under a preset benchmark intensity value to obtain a light intensity deviation value; confirming that the light intensity deviation value is greater than a preset light intensity deviation threshold, then obtaining the time corresponding to the light intensity data as the current light burial alarm time; confirming that the difference between the historical light burial alarm time and the current light burial alarm time is greater than a preset interval threshold, then generating a first burial determination result; the first burial determination result is that the light is buried.

[0036] In the above embodiments, a first burial determination result is generated when the difference between the historical light burial alarm time and the current light burial alarm time is less than a preset interval threshold. This effectively distinguishes between momentary shading caused by temporary vehicle parking or pedestrians briefly stopping, as well as periodic shadows caused by buildings or trees at fixed times of the day and dark night scenes caused by day-night alternation. Furthermore, this embodiment only generates the first burial determination result when the difference between the light burial alarm times is greater than the set preset interval threshold, avoiding the problem of frequent false alarms of manhole cover burial caused by common short-term interference, improving the reliability of the first burial determination result, and thus improving the accuracy of manhole cover burial determination.

[0037] Further, the step of comparing the signal strength data with a preset reference signal strength value to obtain a second burial determination result includes: calculating the difference based on the signal strength data with a preset reference signal strength value to obtain a signal strength difference; confirming that the signal strength difference is less than a preset signal strength deviation threshold, then generating a second burial determination result; the second burial determination result indicates that the signal is buried.

[0038] In the above embodiments, since the propagation environment of wireless signals changes after the drainage well cover is buried, the signal penetration loss is significantly attenuated. Therefore, this embodiment compares the signal strength difference with the preset signal strength deviation threshold, and ensures that only when the signal strength deviates significantly from the preset reference signal strength value can the second burial determination result be directly generated. This can effectively distinguish the daily fluctuations caused by temporary obstacles, base station load, reflections from surrounding buildings, etc., and reduce the false alarm rate of well cover burial.

[0039] Further, the step of comparing the temperature data with a preset benchmark temperature value to obtain a third burial determination result includes: obtaining the most recent temperature burial alarm time and using the temperature burial alarm time as a historical temperature burial alarm time; calculating the difference based on the temperature data at the preset benchmark temperature value to obtain a temperature difference; confirming that the temperature difference is greater than a preset temperature deviation threshold, then obtaining the time corresponding to the temperature data as the current temperature burial alarm time; confirming that the difference between the historical temperature burial alarm time and the current temperature burial alarm time is greater than a preset interval threshold, then generating a third burial determination result; the third burial determination result is that the area is buried.

[0040] In the above embodiments, since the internal heat exchange environment of the drainage manhole cover becomes closed after it is buried, the temperature inside the manhole cover deviates significantly from the external environment over a long period of time. Therefore, this embodiment compares the temperature difference with a preset temperature deviation threshold, and ensures that a third burial determination result is generated only when the temperature significantly deviates from the preset reference temperature value. This effectively distinguishes normal temperature fluctuations caused by day-night cycles or short-term weather changes, reducing the false alarm rate of manhole cover burial. Furthermore, this embodiment uses the time difference between historical temperature burial alarm times and current temperature burial alarm times to determine the duration of the state where the temperature data seriously deviates from the reference temperature value. Only after the duration exceeds the interval threshold is a third burial determination result generated. Therefore, this embodiment can eliminate the interference of instantaneous heat sources on the manhole cover burial determination, improve the reliability of the third burial determination result, and thus improve the accuracy of manhole cover burial determination.

[0041] Further, the step of comparing the oxygen concentration data with a preset benchmark oxygen concentration value to obtain a fourth burial determination result includes: obtaining the most recent oxygen concentration burial alarm time and using the oxygen concentration burial alarm time as the historical oxygen concentration burial alarm time; calculating the difference based on the oxygen concentration data at the preset benchmark oxygen concentration value to obtain an oxygen concentration difference; confirming that the oxygen concentration difference is greater than a preset oxygen concentration deviation threshold, then obtaining the time corresponding to the oxygen concentration data as the current oxygen concentration burial alarm time; confirming that the difference between the historical oxygen concentration burial alarm time and the current oxygen concentration burial alarm time is greater than a preset interval threshold, then generating a fourth burial determination result; the fourth burial determination result is that the area has been buried.

[0042] In the above embodiments, when a drainage well cover is buried, its vents are blocked, preventing normal air exchange between the inside and outside of the well. Oxygen inside the well cover is continuously consumed due to various oxidation reactions or microbial activity, resulting in a significant decrease in oxygen concentration. Therefore, this embodiment, after confirming that the oxygen concentration data is not greater than a preset benchmark oxygen concentration value, and further confirming that the difference between the historical oxygen concentration burial alarm time and the current oxygen concentration burial alarm time is greater than a preset interval threshold, generates a fourth burial determination result. This improves the reliability of the fourth burial determination result, thereby increasing the accuracy of well cover burial determination.

[0043] Preferably, the preset interval threshold is set to 36h.

[0044] Further, the step of obtaining the burial status based on the first burial determination result, the second burial determination result, the third burial determination result, and the fourth burial determination result, under a preset burial determination algorithm, includes: confirming that at least one of the first burial determination result, the second burial determination result, the third burial determination result, and the fourth burial determination result is buried; then, after a preset number of continuous samplings, collecting a light intensity dataset, a signal intensity dataset, a temperature dataset, and an oxygen concentration dataset; comparing the light intensity dataset with a preset reference light intensity value to obtain a first burial determination result; comparing the signal intensity dataset with a preset reference signal intensity value to obtain a second burial determination result; comparing the temperature dataset with a preset reference temperature value to obtain a third burial determination result; comparing the oxygen concentration dataset with a preset reference oxygen concentration value to obtain a fourth burial determination result; confirming that at least one of the first burial determination result, the second burial determination result, the third burial determination result, and the fourth burial determination result is buried, then generating a burial status; the burial status is "buried".

[0045] In the above embodiments, when at least one of the first burial determination result, the second burial determination result, the third burial determination result, and the fourth burial determination result indicates that the manhole cover is buried, this embodiment continuously collects multiple sets of light intensity data, signal intensity data, temperature data, and oxygen concentration data after a preset number of continuous samplings, forming light intensity datasets, signal intensity datasets, temperature datasets, and oxygen concentration datasets. Based on these datasets, they are compared again to obtain the corresponding first burial determination result, second burial determination result, third burial determination result, and fourth burial determination result. This embodiment, through continuous observation and verification of light intensity data, signal intensity data, temperature data, and oxygen concentration data, can effectively reduce misjudgments of manhole cover burial caused by instantaneous sensor noise or short-term environmental interference, ensuring high reliability of the generated burial status and thus improving the accuracy of manhole cover burial determination.

[0046] Please see Figure 6 This embodiment also provides a drainage well cover burial determination system for implementing a drainage well cover burial determination method as described in any of the preceding embodiments, comprising: a multimodal data acquisition module for acquiring light intensity data, signal strength data, temperature data, and oxygen concentration data inside the well chamber through a monitoring terminal of the target well cover; a light burial determination module for comparing the light intensity data with a preset reference light intensity value to obtain a first burial determination result; a signal burial determination module for comparing the signal strength data with a preset reference signal strength value to obtain a second burial determination result; and a temperature burial determination module. The determination module is used to compare the temperature data with a preset reference temperature value to obtain a third burial determination result; the oxygen concentration burial determination module is used to compare the oxygen concentration data with a preset reference oxygen concentration value to obtain a fourth burial determination result; the burial status confirmation module is used to determine the burial status based on the first burial determination result, the second burial determination result, the third burial determination result, and the fourth burial determination result under a preset burial determination algorithm; the burial alarm module is used to generate burial alarm information corresponding to the target manhole cover if the burial status is confirmed to be burial.

[0047] Furthermore, the multimodal data acquisition module is used to collect light intensity data, signal intensity data, temperature data, and oxygen concentration data inside the manhole through the monitoring terminal of the target manhole cover, including: obtaining the current time and confirming that the current time is the preset monitoring sampling time, and then collecting light intensity data, signal intensity data, temperature data, and oxygen concentration data inside the manhole through the monitoring terminal of the target manhole cover.

[0048] In the above embodiments, the subsequent manhole cover burial determination process is based on light intensity data, signal intensity data, temperature data, and oxygen concentration data. This comprehensively identifies abnormal states such as decreased oxygen concentration and abnormal temperature changes in the early stages of manhole cover burial, improving the accuracy of subsequent manhole cover burial determination. Furthermore, this embodiment obtains the burial status based on the first, second, third, and fourth burial determination results under a preset burial determination algorithm. This avoids the problem of incorrect generation of burial alarm information due to misjudgment of a single burial determination result in existing technologies, thus improving the accuracy of manhole cover burial determination.

[0049] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method for determining the burial of drainage well covers, characterized in that, Includes the following steps: Data on light intensity, signal strength, temperature, and oxygen concentration inside the manhole are collected through the monitoring terminal of the target manhole cover. Based on the light intensity data, a comparison is made with a preset benchmark light intensity value to obtain a first burial determination result; Based on the signal strength data, a second burial determination result is obtained by comparing it with a preset reference signal strength value. Based on the temperature data, a comparison is made at a preset reference temperature value to obtain a third burial determination result; Based on the oxygen concentration data, a comparison is made with a preset benchmark oxygen concentration value to obtain the fourth burial determination result; Based on the first burial determination result, the second burial determination result, the third burial determination result, and the fourth burial determination result, the burial status is obtained under the preset burial determination algorithm; If the burial status is confirmed to be "buried", then a burial alarm message corresponding to the target manhole cover is generated.

2. The method for determining the burial of a drainage well cover as described in claim 1, characterized in that, The monitoring terminal for the target manhole cover collects data on light intensity, signal strength, temperature, and oxygen concentration inside the manhole, including: Once the current time is obtained and confirmed as the preset monitoring sampling time, the light intensity data, signal strength data, temperature data, and oxygen concentration data inside the manhole are collected through the monitoring terminal of the target manhole cover.

3. The method for determining the burial of a drainage well cover as described in claim 1, characterized in that, The step of confirming that the burial status is that the manhole cover is buried, and generating a burial alarm message corresponding to the target manhole cover, also includes: If it is confirmed that the burial state is not burial, then the reference value adjustment step is performed to obtain the reference light intensity value, reference signal intensity value, reference temperature value and reference oxygen concentration value; The benchmark adjustment steps include: Obtain a set of historical normal light intensities, and compare the light intensity data with the set of historical normal light intensities to obtain the minimum light intensity value, and use the minimum light intensity value as the reference light intensity value; Obtain a set of historical normal signal strengths, and compare the signal strength data with the set of historical normal signal strengths to obtain the minimum signal strength value, and use the minimum signal strength value as the reference signal strength value; Obtain a set of historical normal temperatures, and based on the temperature data and the set of historical normal temperatures, perform mean processing to obtain the average temperature value, and use the average temperature value as the reference temperature value; A set of historical normal oxygen concentrations is obtained, and based on the oxygen concentration data and the set of historical oxygen concentrations, an average oxygen concentration is obtained, and the average oxygen concentration is used as the baseline oxygen concentration value.

4. The method for determining the burial of a drainage well cover as described in claim 1, characterized in that, The step of comparing the light intensity data with a preset reference light intensity value to obtain a first burial determination result includes: Obtain the time of the most recent light burial alarm and use the light burial alarm time as the historical light burial alarm time; Based on the light intensity data, a difference calculation is performed under a preset baseline intensity value to obtain the light intensity deviation value; If the light intensity deviation value is confirmed to be greater than the preset light intensity deviation threshold, then the time corresponding to the light intensity data is obtained as the current light burial alarm time; If the difference between the historical light burial alarm time and the current light burial alarm time is confirmed to be greater than a preset interval threshold, a first burial determination result is generated; the first burial determination result is that the light burial has occurred.

5. The method for determining the burial of a drainage well cover as described in claim 1, characterized in that, The step of comparing the signal strength data with a preset reference signal strength value to obtain a second burial determination result includes: Based on the signal strength data, a difference is calculated under a preset reference signal strength value to obtain the signal strength difference. If the signal strength difference is confirmed to be greater than the preset signal strength deviation threshold, a second burial determination result is generated; the second burial determination result indicates that the signal is buried.

6. The method for determining the burial of a drainage well cover as described in claim 1, characterized in that, The process of comparing the temperature data with a preset reference temperature value to obtain a third burial determination result includes: Obtain the most recent temperature burial alarm time and use the temperature burial alarm time as the historical temperature burial alarm time; Based on the temperature data, the temperature difference is calculated at a preset reference temperature value. If the temperature difference is confirmed to be greater than the preset temperature deviation threshold, the time corresponding to the temperature data is obtained as the current temperature burial alarm time. If the difference between the historical temperature burial alarm time and the current temperature burial alarm time is greater than a preset interval threshold, a third burial determination result is generated; the third burial determination result is that the area has been buried.

7. The method for determining the burial of a drainage well cover as described in claim 1, characterized in that, The fourth burial determination result is obtained by comparing the oxygen concentration data with a preset benchmark oxygen concentration value, including: Obtain the time of the most recent oxygen concentration burial alarm, and use the oxygen concentration burial alarm time as the historical oxygen concentration burial alarm time; Based on the oxygen concentration data, the difference is calculated under a preset baseline oxygen concentration value to obtain the oxygen concentration difference. If the oxygen concentration difference is confirmed to be greater than the preset oxygen concentration deviation threshold, then the time corresponding to the oxygen concentration data is obtained as the current oxygen concentration burial alarm time. If the difference between the historical oxygen concentration burial alarm time and the current oxygen concentration burial alarm time is greater than a preset interval threshold, a fourth burial determination result is generated; the fourth burial determination result is that the oxygen concentration has been burial.

8. The method for determining the burial of a drainage well cover as described in claim 1, characterized in that, The process of obtaining the burial status based on the first burial determination result, the second burial determination result, the third burial determination result, and the fourth burial determination result, under a preset burial determination algorithm, includes: If at least one of the first burial determination result, the second burial determination result, the third burial determination result, and the fourth burial determination result is confirmed to be buried, then light intensity dataset, signal intensity dataset, temperature dataset, and oxygen concentration dataset are collected after a preset number of consecutive samplings. Based on the light intensity dataset, a comparison is made under a preset benchmark light intensity value to obtain the first burial determination result; Based on the signal strength dataset, a comparison is made with a preset reference signal strength value to obtain a second burial determination result; Based on the temperature dataset, a comparison is made at a preset reference temperature value to obtain a third burial determination result; Based on the oxygen concentration dataset, a comparison is made at a preset baseline oxygen concentration value to obtain the fourth burial determination result; If at least one of the first burial determination result, the second burial determination result, the third burial determination result, and the fourth burial determination result is confirmed to be buried, then a burial state is generated; the burial state is buried.

9. A drainage well cover burial determination system, characterized in that, A method for determining the burial of a drainage well cover as described in any one of claims 1 to 8, comprising: The multimodal data acquisition module is used to collect light intensity data, signal strength data, temperature data, and oxygen concentration data inside the manhole through the monitoring terminal of the target manhole cover; The light burial determination module is used to compare the light intensity data with a preset benchmark light intensity value to obtain a first burial determination result. The signal burial determination module is used to compare the signal strength data with a preset reference signal strength value to obtain a second burial determination result. The temperature burial determination module is used to compare the temperature data with a preset reference temperature value to obtain a third burial determination result. The oxygen concentration burial determination module is used to compare the oxygen concentration data with a preset benchmark oxygen concentration value to obtain a fourth burial determination result. The burial status confirmation module is used to obtain the burial status based on the first burial determination result, the second burial determination result, the third burial determination result, and the fourth burial determination result, under a preset burial determination algorithm. The burial alarm module is used to generate burial alarm information corresponding to the target manhole cover if the burial status is confirmed to be burial.

10. A drainage well cover burial determination system as described in claim 9, characterized in that, The multimodal data acquisition module is used to collect light intensity data, signal strength data, temperature data, and oxygen concentration data inside the manhole through the monitoring terminal of the target manhole cover, including: Once the current time is obtained and confirmed as the preset monitoring sampling time, the light intensity data, signal strength data, temperature data, and oxygen concentration data inside the manhole are collected through the monitoring terminal of the target manhole cover.

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