CN117128461B - Leakage detection method, system and device for ground temperature field and storage medium - Google Patents
Leakage detection method, system and device for ground temperature field and storage medium Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 claims abstract description 42
- 239000013307 optical fiber Substances 0.000 claims abstract description 15
- 230000005856 abnormality Effects 0.000 claims abstract description 11
- 230000002159 abnormal effect Effects 0.000 claims description 145
- 230000003247 decreasing effect Effects 0.000 claims description 12
- 238000012545 processing Methods 0.000 claims description 9
- 238000004590 computer program Methods 0.000 claims description 5
- 230000001174 ascending effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 description 21
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- 239000007788 liquid Substances 0.000 description 6
- 230000006870 function Effects 0.000 description 5
- 238000004378 air conditioning Methods 0.000 description 4
- 238000009529 body temperature measurement Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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- 238000011156 evaluation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/002—Investigating fluid-tightness of structures by using thermal means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
- G01M3/2815—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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Abstract
The application relates to a leakage detection method, a leakage detection system, a leakage detection device and a storage medium of a ground temperature field, which belong to the technical field of optical fibers, and the leakage detection method comprises the following steps: acquiring operation parameters of a plurality of nodes transmitted by a distributed optical fiber temperature measuring host, wherein the operation parameters comprise temperature, vibration frequency and pressure; determining a node with abnormality of at least one parameter of temperature, vibration frequency and pressure as an initial leakage point; acquiring operation parameters of each node adjacent to the initial leakage point; and determining a final leakage point according to the operation parameters of the initial leakage point and the operation parameters of each node adjacent to the initial leakage point. The method has the effect of improving the accuracy of positioning the leakage point in the ground temperature field.
Description
Technical Field
The present disclosure relates to the field of optical fiber technologies, and in particular, to a method, a system, an apparatus, and a storage medium for detecting leakage in a ground temperature field.
Background
The central air conditioning system of the ground source heat pump is a heat supply air conditioning system which takes rock-soil body, underground water or surface water as a low-temperature heat source and consists of a heat pump unit, a geothermal energy exchange system and a system in a building. The working principle is as follows: in winter, the heat pump unit absorbs heat from a ground source and supplies heat to a building; in summer, the heat pump unit absorbs heat from the indoor space and transfers the heat to the ground source to realize air conditioning refrigeration of the building, and the renewable air conditioning system is applied to some public places, such as office buildings or shopping malls.
In practical use, because the heat of the low-temperature heat sources of different crust shallow layers is different, the ground temperature field can be selected according to the requirement of a heat supply object, and the ground temperature field provides the heat supply object with the required temperature. Besides the heat of the ground temperature field can be influenced by the position depth of the ground temperature field, the heat distribution of the ground temperature field can also be influenced by the leakage of the buried pipeline in the ground temperature field, so that the leakage point of the buried pipeline in the ground temperature field needs to be positioned in time and overhauled, and the influence of the leakage point on the ground temperature field is reduced.
Currently, a commonly adopted ground temperature field leakage detection mode is to embed a temperature sensor in a ground temperature field, measure the temperature in the ground temperature field by the temperature sensor, and locate the position of a leakage point according to the change of the temperature. The leakage detection mode is high in construction difficulty, unstable in signal conversion, and large in temperature error, and the temperature value transmitted by the temperature sensor is influenced by the ground surface, so that leakage points of the buried pipeline cannot be accurately positioned.
Disclosure of Invention
The application provides a leakage detection method, a leakage detection system, a leakage detection device and a storage medium for a ground temperature field, which have the characteristic of improving the accuracy of positioning leakage points in the ground temperature field.
The application aims at providing a leakage detection method for a ground temperature field.
The first object of the present application is achieved by the following technical solutions:
a method of leak detection of a ground temperature field, comprising:
acquiring the temperature, vibration frequency and pressure of a plurality of nodes sent by a distributed optical fiber temperature measuring host;
determining a node with abnormality of at least one parameter of the temperature, the vibration frequency and the pressure as an initial leakage point;
acquiring operation parameters of each node adjacent to the initial leakage point;
and determining a final leakage point according to the operation parameters of the initial leakage point and the operation parameters of each node adjacent to the initial leakage point.
Through adopting above-mentioned technical scheme, at first, this application has abandoned traditional mode of burying temperature sensor in the ground temperature field and has gathered temperature data, but obtains temperature, vibration frequency and the pressure of the node in the ground temperature field with the optical fiber technology, judges whether the node is initial leak point according to temperature, vibration frequency and pressure three key factors, and the rethread obtains the operating parameter of the node adjacent with initial leak point, confirms final leak point through the operating parameter of initial leak point and the operating parameter of the node adjacent with initial leak point. Therefore, when judging whether the initial leakage point is the final leakage point, the method not only relates to the operation parameters of the initial leakage point, but also compares the operation parameters of the initial leakage point with the operation parameters of surrounding nodes, thereby improving the accuracy of the obtained final leakage point.
The present application may be further configured in a preferred example to: the determining a final leak point according to the operation parameters of the initial leak point and the operation parameters of each node adjacent to the initial leak point comprises:
marking the abnormal temperature and/or abnormal vibration frequency and/or abnormal pressure as abnormal elements;
acquiring a comparison element corresponding to the abnormal element from the operation parameters of each node adjacent to the initial leakage point, wherein the comparison element and the information contained by the abnormal element belong to the same category, and the category comprises a temperature type, a vibration type and a pressure type;
and determining a final leakage point by comparing the abnormal element with the control element according to the abnormal type of the abnormal element.
By adopting the technical scheme, on one hand, the method and the device can reduce the calculated amount of the method and the device, save the time for obtaining the final leakage point and ensure the instantaneity of leakage detection by only comparing the comparison element with the abnormal element. On the other hand, the method and the device can reduce the interference of other elements by only comparing the comparison element with the abnormal element, thereby providing technical support for enabling the final leakage point to be a real leakage point.
The present application may be further configured in a preferred example to: determining a final leak point by comparing the abnormal element with the control element according to the abnormal type of the abnormal element, including:
when the abnormal element is higher than a preset threshold range, the preset threshold range is one or more of a preset temperature range, a preset vibration frequency range and a preset pressure range;
judging whether the following conditions are satisfied: the control element is greater than the anomaly element; if yes, the node with the comparison element larger than the abnormal element is the final leakage point; if not, the initial leakage point is the final leakage point; or alternatively
When the abnormal element is lower than a preset threshold range, judging whether the abnormal element meets the following conditions: the control element is smaller than the abnormal element;
if yes, the node with the comparison element larger than the abnormal element is the final leakage point;
if not, the initial leakage point is the final leakage point.
By adopting the technical scheme, when the abnormal element is higher than the preset threshold range, the node is marked as the initial leakage point, and if the contrast element of the node adjacent to the abnormal element is higher than the abnormal element, the node adjacent to the abnormal element is also indicated as the leakage point and is more serious than the initial leakage point, so the node adjacent to the initial leakage point is taken as the final leakage point. Similarly, when the abnormal element is lower than the preset threshold range, the node is marked as an initial leakage point, and if the contrast element of the adjacent node is lower than the abnormal element, the node adjacent to the abnormal element is also indicated as the leakage point and is more serious than the initial leakage point, so the node adjacent to the initial leakage point is taken as a final leakage point.
The present application may be further configured in a preferred example to: when the node where the abnormality occurs in at least one parameter of the temperature, the vibration frequency and the pressure is determined to be an initial leakage point, the marking time is also recorded, and the method further includes:
and obtaining a final leakage point according to the marking time of the initial leakage point and the marking time of the node marked as the leakage point in all nodes adjacent to the initial leakage point.
Through adopting above-mentioned technical scheme, this application is except confirm final leak source through contrast unusual element and contrast element, still confirm final leak source through the mark time of initial leak source and the mark time of the node of being marked as the leak source in all nodes adjacent with initial leak source to the managers of being convenient for select different judgement modes according to the environment demand, in order to improve the adaptive capacity of environment of this application.
The present application may be further configured in a preferred example to: the step of obtaining a final leak according to the marking time of the initial leak and the marking time of the node marked as the leak in all the nodes adjacent to the initial leak, including:
arranging a plurality of marking times in an ascending order;
And taking the initial leak points or the leak points corresponding to the first marking time in the sequence as the final leak points.
By adopting the technical scheme, when the liquid working medium in the ground temperature field leaks, the leaked liquid working medium has fluidity, so that the node marked first is used as the final leakage point.
The present application may be further configured in a preferred example to: judging whether the temperature, the vibration frequency and the pressure are abnormal or not by the following judging mode:
when the temperature exceeds a preset temperature range, judging that the temperature is abnormal;
when the vibration frequency exceeds a preset vibration frequency range, judging that the vibration frequency is abnormal;
when the pressure exceeds the preset pressure range, the judgment result is that the pressure is abnormal.
The present application may be further configured in a preferred example to: judging whether the temperature, the vibration frequency and the pressure are abnormal or not by the following judging mode:
when the temperature is increased or decreased suddenly, the temperature is judged to be abnormal;
when the vibration frequency is suddenly increased or reduced, the judgment result is that the vibration frequency is abnormal;
when the pressure is increased or decreased suddenly, the pressure is abnormal.
Through adopting above-mentioned technical scheme, this application provides two kinds of differences, is used for judging whether the node is the mode of initial leak source, and the managers of being convenient for select different judgement modes according to the environment demand to improve the adaptive capacity of the environment of this application.
The second purpose of the application is to provide a leakage detection system of a ground temperature field.
The second object of the present application is achieved by the following technical solutions:
a system for leak detection of a ground temperature field, comprising:
the data receiving module is used for acquiring operation parameters of a plurality of nodes sent by the distributed optical fiber temperature measuring host, wherein the operation parameters comprise temperature, vibration frequency and pressure;
the data processing module is used for determining that a node with abnormality of at least one parameter of the temperature, the vibration frequency and the pressure is an initial leakage point:
the data acquisition module is used for acquiring the operation parameters of each node adjacent to the initial leakage point;
and the data determining module is used for determining a final leakage point according to the operation parameters of the initial leakage point and the operation parameters of each node adjacent to the initial leakage point.
The third object of the application is to provide a leakage detection device of ground temperature field.
The third object of the present application is achieved by the following technical solutions:
The leakage detecting device for the ground temperature field comprises a memory and a processor, wherein a computer program is stored in the memory, and the processor realizes the leakage detecting method for any ground temperature field when executing the program.
A fourth object of the present application is to provide a computer-readable storage medium capable of storing a corresponding program.
The fourth object of the present application is achieved by the following technical solutions:
a computer readable storage medium having stored thereon a computer program which when executed by a processor implements any of the above described earth temperature field leak detection methods.
In summary, the present application includes at least one of the following beneficial technical effects:
1. firstly, two different modes for judging whether the node is an initial leakage point are provided, so that a manager can conveniently select different judging modes according to environmental requirements, and the environment adaptability of the node is improved;
2. the method comprises the steps of determining a first leakage point, determining a second leakage point, determining a third leakage point, determining a fourth leakage point, determining a fifth leakage point by comparing an abnormal element with a comparison element, determining the third leakage point by the marking time of the first leakage point and the marking time of the node marked as the second leakage point in all nodes adjacent to the first leakage point, namely providing two ways for judging whether the first leakage point is the third leakage point or not, so that a manager can conveniently select different judging ways according to environmental requirements, and guaranteeing the accuracy of the finally obtained third leakage point;
3. In addition, when judging whether the initial leakage point is the final leakage point, the method not only relates to the operation parameters of the initial leakage point, but also compares the abnormal elements in the initial leakage point with the control elements of surrounding nodes, thereby improving the accuracy of the obtained final leakage point.
Drawings
FIG. 1 is a schematic diagram of an exemplary operating environment of an embodiment of the present application.
Fig. 2 is a flow chart of a method of leak detection of a ground temperature field of example 1 of the present application.
Fig. 3 is a flow chart of a method of leak detection of a ground temperature field of example 2 of the present application.
Fig. 4 is a flow chart of a method of leak detection of a ground temperature field of example 3 of the present application.
Fig. 5 is a block diagram of a leak detection system for a ground temperature field in accordance with an embodiment of the application.
Reference numerals illustrate: 1. a ground temperature field; 2. detecting a cable; 3. a distributed optical fiber temperature measuring host; 4. a centralized monitoring platform; 41. a data receiving module; 42. a data processing module; 43. a data acquisition module; 44. and a data determining module.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
Example 1
FIG. 1 shows a schematic diagram of an exemplary operating environment in which embodiments of the present application can be implemented, including a ground temperature field 1, a detection cable 2, a distributed fiber optic thermometry host 3, and a centralized monitoring platform 4. The ground temperature field 1 is internally provided with a heat pump unit which mainly comprises a compressor, a condenser, an evaporator and an expansion valve, and the ground source heat pump is continuously completed by liquid working medium (refrigerant or refrigerant): the thermodynamic cycle of evaporation (taking up heat from the environment) -compression-condensation (giving off heat) -throttling-re-evaporation, thereby transferring the heat from the environment to the water or soil. The compressor plays a role in compressing and conveying the circulating working medium from a low-temperature low-pressure position to a high-temperature high-pressure position and is a heart of the heat pump system; the evaporator is equipment for outputting cold energy, and has the main function of evaporating the refrigerant liquid flowing in through the throttle valve to absorb the heat of the cooled object so as to achieve the aim of refrigeration; the condenser is a device for outputting heat, and the heat absorbed from the evaporator and the heat converted by the power consumed by the compressor are taken away by a cooling medium in the condenser, so that the ground source heat pump achieves the aim of heating; the expansion valve or the throttle valve plays a role in throttling and depressurization of the circulating working medium and regulates the flow of the circulating working medium entering the evaporator. According to the second law of thermodynamics, the work consumed by the compressor plays a role in compensation, so that the circulating working medium continuously absorbs heat from the low-temperature environment and releases heat to the high-temperature environment to circulate repeatedly.
The detection cable 2 is installed in the ground temperature field 1, specifically, the detection cable 2 can be arranged to cover the whole heat pump unit and also can be arranged to be crossed with the heat pump unit, so that the detection cable 2 can be fully contacted with the heat pump unit. In this example, the detection cable 2 can be located at any point in the ground temperature field 1 as an acquisition sensor, each of which is capable of acquiring operating parameters in the environment in which it is located, including temperature, vibration frequency and pressure. The environment on the path of the detection cable 2 is also called a node, so that a plurality of nodes are arranged on one detection cable 2, the specific number of the nodes is related to the length of the detection cable 2 and the distance between two adjacent nodes, for example, the distance between any two nodes of the detection cable 2 is 5cm, and if the length of the detection cable 2 is 3m, 60 nodes are obtained.
After the operation parameters of each node are collected, the detection cable 2 transmits the operation parameters collected in real time to the distributed optical fiber temperature measurement host 3. It should be further noted that, since the detection cable 2 has advantages of no electrical sensing, stable chemical properties, long transmission distance, etc., the present application is used for absolute measurement of the operation parameters of each node, so as to provide technical support for obtaining accurate operation parameters.
The distributed optical fiber temperature measurement host 3 can be connected with a plurality of detection cables 2 at the same time, sends optical signals to the plurality of detection cables 2 respectively connected with the detection cables, receives operation parameters returned by the plurality of detection cables 2, and transmits the operation parameters to the centralized monitoring platform 4 after the operation parameters are filtered, amplified and the like.
The centralized monitoring platform 4 is composed of one or more servers, after receiving the processed operation parameters, the centralized monitoring platform 4 analyzes the leakage points in the ground temperature field 1 according to the operation parameters, then remotely sends the leakage points to the user terminal, and finally overhauls the leakage points according to the concrete leakage points displayed on the user terminal by overhaulers. In this example, the user terminal may be a smart device such as a mobile phone, tablet, computer, or the like.
It should be noted that the operating environment illustrated in fig. 1 is merely illustrative, and is in no way intended to limit the application or uses of embodiments of the present invention. For example, multiple ground temperature fields 1 may be included in the operating environment, and the centralized monitoring platform 4 may monitor leakage points in multiple ground temperature fields 1 simultaneously.
Fig. 2 shows a flowchart of a method for leak detection of a ground temperature field according to an embodiment of the present application, where the method is applied to the centralized monitoring platform 4 in fig. 1, and specifically, the main flow of the method is described as follows.
Step S100, operation parameters of a plurality of nodes are obtained, wherein the operation parameters comprise temperature, vibration frequency and pressure.
As can be seen from the embodiment, the operation parameters of the node are three parameters including temperature, vibration frequency and pressure, which are sent to the centralized monitoring platform 4 by the distributed optical fiber temperature measuring host 3.
It should be noted that, the topology structure formed by all the nodes in the ground temperature field 1 is stored in the centralized monitoring platform 4, and the position of each node in the topology structure is the same as the position in the actual ground temperature field 1, so that the centralized monitoring platform 4 can conveniently judge whether the node is a leakage point according to the operation parameters collected at the node.
And step 200, determining a node with abnormality of at least one parameter of temperature, vibration frequency and pressure as an initial leakage point.
Specifically, the temperature, the vibration frequency and the pressure of the node are collected, and when at least one parameter of the temperature, the vibration frequency and the pressure of the node is abnormal, the node is marked as an initial leakage point. It should be noted that, the node marked as the initial leak point is not just a node where a leak exists, but further judgment is required to reach a conclusion, and the specific judgment process is shown in step S400.
In a specific example, the process of judging whether the temperature, the vibration frequency and the pressure are abnormal respectively is as follows:
when the temperature exceeds a preset temperature range, judging that the temperature is abnormal;
when the vibration frequency exceeds a preset vibration frequency range, judging that the vibration frequency is abnormal;
when the pressure exceeds the preset pressure range, the judgment result is that the pressure is abnormal.
The above-mentioned preset temperature range, preset vibration frequency range, and preset pressure range are all set in the centralized monitoring platform 4 in advance, wherein the preset temperature range is obtained by evaluating the temperature fluctuation range of each node according to the heat stored in the ground temperature field 1 and the heat generated when the heat pump unit exchanges heat, and then the evaluated temperature fluctuation range is stored in the centralized monitoring platform 4 as the preset temperature range. Similarly, the preset vibration frequency range and the preset pressure range are also the fluctuation ranges obtained by evaluating the heat pump units in the ground temperature field 1 and the ground temperature field 1, namely, the fluctuation ranges can be obtained through limited tests.
That is, when: and when the temperature exceeds a preset temperature range and/or the vibration frequency exceeds a preset vibration frequency range and/or the pressure exceeds a preset pressure range, determining a node corresponding to the operation parameter as an initial leakage point. In this example, the correspondence here means: and if the operation parameters are acquired from the nodes, indicating that the acquired operation parameters have a corresponding relation with the nodes.
In other examples, the process of determining whether an abnormality occurs in temperature, vibration frequency, and pressure, respectively, is:
when the temperature is increased or decreased suddenly, the temperature is judged to be abnormal;
when the vibration frequency is suddenly increased or reduced, the judgment result is that the vibration frequency is abnormal;
when the pressure is increased or decreased suddenly, the pressure is abnormal.
The above-mentioned abrupt increase of temperature means that the current temperature of the node and the temperatures of a plurality of previous continuous moments form a temperature sequence, the temperatures in the temperature sequence are arranged from the head of the team to the tail of the team according to the output sequence, if the temperatures of a plurality of continuous moments in the temperature sequence are sequentially increased, and the increment between the temperatures of the current moment and the temperatures of the previous moment exceeds a preset value, the node is marked as an initial leakage point, for example, the node a already obtains the temperature sequence (12 ℃, 15 ℃, 20 ℃, 28 ℃) between 08:00 and 08:04, and the preset value is set to 10 ℃, so that at 08:05, if the detected temperature is 40 ℃, the temperature at 08:05 is abruptly increased due to 40 ℃ > (28+10). Judging whether the temperature is steeply reduced is similar to the judgment whether the temperature is steeply reduced, wherein the difference is that when the temperature is steeply reduced, if: the temperatures at a plurality of successive moments in the temperature sequence decrease in sequence, and when the decreasing amount between the temperature and the temperature at the previous moment exceeds a preset value, the node is determined to be an initial leakage point.
It should be noted that, judging whether the vibration frequency is increased suddenly and whether the pressure is increased suddenly is similar to the above process of judging whether the temperature is increased suddenly, so the application is not repeated here; and judging whether the vibration frequency is suddenly reduced and whether the pressure is suddenly reduced is similar to the process of judging whether the temperature is suddenly reduced, so that the repeated description is omitted.
That is, when: and when the temperature is increased or decreased suddenly and/or the vibration frequency is increased or decreased suddenly and/or the pressure is increased or decreased suddenly, determining the node corresponding to the operation parameter as the initial leakage point. The correspondence between the operation parameters and the nodes in this case is the same as that described above, and therefore, the description thereof will not be repeated here.
In actual use, any one of the above-mentioned judging modes can be selected according to the need to determine whether the node is an initial leakage point, or two judging modes can be adopted simultaneously to determine whether the node is an initial leakage point, and the selected judging mode is not limited in this application.
Step S300, obtaining the operation parameters of each node adjacent to the initial leakage point.
In a specific example, before the operation parameter of each node adjacent to the initial leakage point is obtained, the regulatory information corresponding to the initial leakage point needs to be obtained. The control information is stored in the centralized monitoring platform 4, and the control information comprises a preset temperature range, a preset vibration frequency range, a preset pressure range, a preset value for the steep increase of temperature, a preset value for the steep increase of vibration frequency and a preset value for the steep increase of pressure, which correspond to winter respectively, a preset temperature range, a preset vibration frequency range, a preset pressure range, a preset value for the steep decrease of temperature, a preset value for the steep decrease of vibration frequency and a preset value for the steep decrease of pressure, which correspond to summer respectively. In practical use, the preset parameters related to the judgment mode in the step S200 need to be switched correspondingly in different seasons, for example, a preset temperature range corresponding to winter is selected in winter, and a preset temperature range corresponding to summer is selected in summer. In addition, the regulation information also comprises states of the heat pump unit, wherein the states comprise a stop state, a start state, an operating state and a closing state, the start state refers to a transition stage from the stop state to the operating state, and the closing state refers to a transition stage from the operating state to the stop state.
Then, judging whether the node marked as the initial leakage point is the node with the regulation information or not based on the regulation information, and if so, restoring the initial leakage point to be a normal node; otherwise, the node is kept as the initial leakage point, and the operation parameters of each node adjacent to the initial leakage point are acquired. Taking the example that the node is marked as an initial leakage point due to the steep increase of the temperature, if after the initial leakage point b is determined, the called regulation information is: the heat pump unit is in a starting state, and the starting state of the heat pump unit refers to an excessive stage of entering a working state from a stopping state, so that the temperature of a node in a ground temperature field 1 gradually rises when the heat pump unit is in the starting state, then the heat stored in the ground temperature field 1 in the starting state, the heat converted by the heat pump unit and the heat generated when the heat pump unit works are judged, whether the heat increment of the three heat in the starting state reaches a preset value or more for the steep rise of the temperature or not is calculated, if yes, the steep rise of the temperature is not caused by leakage, but the heat pump unit is in the starting state, and therefore an initial leakage point is recovered to be a normal node b; otherwise, when the heat stored in the ground temperature field 1, the heat converted by the heat pump unit and the heat generated by the heat pump unit during operation are lower than the preset value for the steep increase of the temperature, the steep increase of the temperature is caused by leakage, so that the node is kept as an initial leakage point b, and the operation parameters of each node adjacent to the initial leakage point b are called.
In one specific example, the operating parameters of each node adjacent to the initial leak point include the temperature, vibration frequency, and pressure of the adjacent node. Because the distributed optical fiber temperature measurement host 3 transmits the received operation parameters to the centralized monitoring platform 4 in real time, and the topology structures of all nodes are stored in the centralized monitoring platform 4, after the initial leakage point is determined, the centralized monitoring platform 4 can determine the node adjacent to the initial leakage point and acquire the operation parameters of each node adjacent to the initial leakage point.
Step S400, determining a final leakage point according to the operation parameters of the initial leakage point and the operation parameters of each node adjacent to the initial leakage point.
Step S411, determining an abnormal element according to the operation parameters of the initial leakage point, wherein the abnormal element is abnormal temperature, abnormal vibration frequency and/or abnormal pressure. Specifically, determining an abnormal element in the operation parameter according to the reason that the node is marked as an initial leakage point, for example, if the node is marked as the initial leakage point because the temperature exceeds a preset temperature range, the temperature is the abnormal element; for another example, if the node is marked as an initial leak point because the temperature exceeds a predetermined temperature range and the vibration frequency increases sharply, both the temperature and the vibration frequency are abnormal elements.
Step S412, a control element corresponding to the abnormal element is acquired. Wherein the information contained in the control element and the abnormal element belongs to the same category, and the category comprises a temperature type, a vibration type and a pressure type. As in the example above, if the temperature is an anomaly, the temperature of each node adjacent to the initial leak is a control element; if the temperature and the vibration frequency are abnormal factors, the temperature and the vibration frequency of each node adjacent to the initial leakage point are contrast factors.
Step S413, determining a final leakage point by comparing the abnormal element with the control element according to the abnormal type of the abnormal element. Specifically, according to the abnormal type of the abnormal element, the final leakage point is obtained by comparing the sizes of the abnormal element and the control element. If the abnormal element is higher than the preset threshold range, judging whether the abnormal element meets the following conditions: the control element is greater than the anomaly element; if yes, the node with the comparison element larger than the abnormal element is the final leakage point; if not, the initial leakage point is the final leakage point; or when the abnormal element is lower than a preset threshold range, judging whether the abnormal element meets the following conditions: the control element is smaller than the abnormal element; if yes, the node with the comparison element larger than the abnormal element is the final leakage point; if not, the initial leakage point is the final leakage point. The preset threshold range is one or more of a preset temperature range, a preset vibration frequency range and a preset pressure range. For convenience of explanation, the above-described temperature is also taken as an abnormal element, and both the temperature and the vibration frequency are taken as an example of the abnormal element:
Example 1:
when the abnormal element is temperature and the temperature is higher than the preset temperature range, if: if the comparison element is larger than the abnormal element, the node of the comparison element larger than the abnormal element is the final missing point; otherwise, the initial leakage point is the final leakage point;
when the abnormal element is temperature and the temperature is lower than the preset temperature range, if: if the comparison element is smaller than the abnormal element, the node of which the comparison element is smaller than the abnormal element is the final missing point; otherwise, the initial leakage point is the final leakage point;
example 2:
when the abnormal element is temperature and the temperature is higher than the preset temperature range and the vibration frequency is increased suddenly, if: if the comparison element is larger than the abnormal element and/or the increment of the comparison element is larger than the increment of the abnormal element, the node of the comparison element larger than the abnormal element and/or the node of the comparison element larger than the increment of the abnormal element is the final missing point; otherwise, the initial leakage point is the final leakage point;
when the abnormal element is temperature and the temperature is lower than the preset temperature range and the vibration frequency is increased suddenly, if: if the comparison element is smaller than the abnormal element and/or the increment of the comparison element is larger than the increment of the abnormal element, the node of which the comparison element is smaller than the abnormal element and/or the node of which the increment of the comparison element is larger than the increment of the abnormal element is the final missing point; otherwise, the initial leak point is the final leak point.
It should be noted that the above examples are merely illustrative examples, and when the abnormal element is a steep increase in temperature or when the abnormal element is pressure, the method similar to the above two examples may be used for evaluation, and the present application is not repeated herein.
It should also be noted that, when the determination result is: when the node adjacent to the initial leakage point is the final leakage point, in order to ensure the accuracy of leakage detection, the final leakage point can be used as a new initial leakage point, and the step S300 is returned to, and the steps S300 to S413 are repeated until the new initial leakage point is used as the final leakage point after being judged.
In summary, the implementation principle of the leak detection method for the ground temperature field in embodiment 1 of the present application is as follows: firstly, acquiring the temperature, vibration frequency and pressure of a node, and judging whether the node is an initial leakage point or not by adopting one or more judging modes. After the initial leakage point is determined, the regulation and control information corresponding to the initial leakage point is acquired, and whether the initial leakage point needs to be further judged is determined according to the regulation and control information. When the initial leakage point is determined to be further judged according to the regulation and control information, the operation parameters of each node adjacent to the initial leakage point are called, and finally the final leakage point is determined according to the operation parameters of the initial leakage point and the operation parameters of each node adjacent to the initial leakage point. The method and the device not only relate to the operation parameters of the initial leakage point, but also compare the operation parameters of the initial leakage point with the operation parameters of surrounding nodes when judging whether the initial leakage point is the final leakage point, thereby improving the accuracy of the obtained final leakage point.
Example 2
Example 2 differs from example 1 in that example 2 adds a new determination to determine whether the initial leak is the final leak, as shown in fig. 3:
step S510, obtaining the marking time of the initial leakage point;
step S520, the marking time of the node marked as the leakage point in all the nodes adjacent to the initial leakage point is obtained.
In a specific example, when the node where the abnormality occurs in at least one of the temperature, the vibration frequency, and the pressure is marked as an initial leak point by the centralized monitoring platform 4, the marking time stamp is also recorded, and this marking time stamp is also referred to as marking time. The centralized monitoring platform 4 stores the structure tree, so that when the marking time of the initial leakage point is received, the marking time of the node marked as the leakage point in all nodes adjacent to the initial leakage point can be fetched.
Step S530, based on the obtained marking time, arranging a plurality of marking times in an ascending order mode, and taking the initial leakage point or the leakage point corresponding to the first marking time as the final leakage point.
The method and the device take the marking time as a judging condition for judging whether the initial leakage point is the final leakage point or not, because when the heat pump unit in the ground temperature field 1 leaks, the leaked liquid working medium has fluidity, the node which is marked as the initial leakage point first is taken as the final leakage point, and therefore other nodes are prevented from being taken as the final leakage point by mistake.
It should be noted that, in order to reduce the calculation amount of the centralized monitoring platform 4, when any two adjacent nodes or a plurality of adjacent nodes are all marked as initial leakage points, if the marking time of the two adjacent nodes marked as the initial leakage points is lower than a preset time threshold, the operations of step S300 to step S500 are stopped for the node currently marked as the initial leakage point until the time stamp of the next node marked as the initial leakage point and the node currently marked as the initial leakage point reaches above the preset time threshold, the operations of step S300 to step S500 are performed for the node currently marked as the initial leakage point, otherwise, the situation that the centralized monitoring platform 4 simultaneously invokes the operation parameters of the overlapped plurality of adjacent nodes may occur, thereby increasing the calculation amount of the centralized monitoring platform 4 and possibly causing even calculation confusion.
It should be further noted that the above-mentioned preset time threshold is a flow velocity of the liquid working medium in the ground temperature field 1, which may be obtained through a limited number of experimental calculations.
In addition, since the steps of embodiment 2 are the same as those of embodiment 1, the same steps are not repeated in embodiment 2, but only shown in fig. 3.
Example 3
Embodiment 3 differs from embodiment 1 and embodiment 2, respectively, in that embodiment 3 provides a new determination method based on embodiment 1 and embodiment 2 to determine whether the initial leak point is the final leak point, and the specific determination method is shown in fig. 4:
step S610, comparing the operation parameters of the initial leakage point with the operation parameters of each node adjacent to the initial leakage point to obtain a first score, including:
step S611, determining abnormal elements according to the operation parameters of the initial leakage points;
step S612, obtaining a comparison element corresponding to the abnormal element;
step S613, obtaining a first score by comparing the abnormal element with the control element according to the abnormal type of the abnormal element.
It should be noted that, step S611 is the same as step S411 described above, and step S612 is the same as step S412, so neither step S611 nor step S612 will be described in detail herein. To facilitate the explanation of the process in step S613, the above temperature is taken as an abnormal element as an example:
if the temperature is an abnormal element and the temperature is higher than the preset temperature range, when the following conditions are satisfied: when the comparison element is higher than the abnormal element, calculating a temperature difference value between the abnormal element and the comparison element, and taking an absolute value of the temperature difference value as a first score;
If the temperature is an abnormal element and the temperature is lower than the preset temperature range, when the following conditions are satisfied: when the comparison element is lower than the abnormal element, calculating a temperature difference between the abnormal element and the comparison element, and taking an absolute value of the temperature difference as a first score.
If a plurality of abnormal elements exist, the difference between each abnormal element and the corresponding control element is calculated, the absolute value of each difference is taken and averaged, and finally the average value is taken as a first score.
Step S620, obtaining a second score according to the marking time of the initial leakage point and the marking time of the node marked as the leakage point in all the nodes adjacent to the initial leakage point.
First, the marking time of an initial leak point is acquired, the marking time of a node marked as a leak point among all nodes adjacent to the initial leak point is also acquired, and then a plurality of marking times are arranged in an ascending order based on the plurality of marking times obtained. Finally, according to the arrangement sequence of the marking time from front to back, different scores of the leakage points or the initial leakage points on different sequences are sequentially given, the scores obtained by the leakage points and the initial leakage points according to the sequences are used as second scores, for example, the first score is 50 scores, the second score is 45 scores, the third score is 40 scores, … … scores and the like, and the corresponding scores are obtained until all the leakage points or the initial leakage points which are arranged in the front are obtained. In other examples, different leakage points or different scores of initial leakage points may also be assigned to the order of marking time from front to back, which is not limited herein.
Step S630, obtaining a final leakage point according to the first score and the second score. Specifically, the first score and the second score are added to obtain a leakage score, and a node with the leakage score being greater than a leakage threshold value is used as a final leakage point. From this, it can be seen that the determination method for determining whether the initial leak point is the final leak point in embodiment 3 of the present application can be applied to a case where two or more adjacent leak points are all nodes where leakage actually exists.
It should be noted that, since embodiment 3 is a new determination method provided based on embodiments 1 and 2, the same steps are not repeated in embodiment 3, but only illustrated in fig. 4.
In summary, the implementation principle of the leak detection method for the ground temperature field in embodiment 3 of the present application is as follows: firstly, acquiring the temperature, vibration frequency and pressure of a node, and judging whether the node is an initial leakage point or not by adopting one or more judging modes. After the initial leakage point is determined, the regulation and control information corresponding to the initial leakage point is acquired, and whether the initial leakage point needs to be further judged is determined according to the regulation and control information. When the initial leakage point is determined to be further judged according to the regulation and control information, the operation parameter of each node adjacent to the initial leakage point is called, and finally, the final leakage point is determined according to the operation parameter of the initial leakage point, the marking time of the initial leakage point, the operation parameter of the node adjacent to the initial leakage point and the marking time of the node marked as the leakage point in all the nodes adjacent to the initial leakage point, so that when two or more adjacent leakage points are all nodes with real leakage, the final leakage point can be found in time, namely, the obtained final leakage point is ensured to be the real leakage point.
Fig. 5 shows a block diagram of a system for leak detection of a ground temperature field, which system comprises a data receiving module 41, a data processing module 42, a data acquisition module 43 and a data determination module 44, according to an embodiment of the present application.
The data receiving module 41 is configured to obtain operation parameters of a plurality of nodes sent by the distributed optical fiber temperature measurement host 3, where the operation parameters include temperature, vibration frequency and pressure.
The data processing module 42 is configured to determine a node at which an abnormality occurs in at least one parameter of temperature, vibration frequency, and pressure as an initial leak point.
A data acquisition module 43, configured to acquire an operation parameter of each node adjacent to the initial leak point.
The data determining module 44 is configured to determine a final leak based on the operation parameters of the initial leak and the operation parameters of each node adjacent to the initial leak.
In a specific example, the data determining module 44 is further configured to obtain the final leak according to the marking time of the initial leak and the marking time of the node marked as the leak in all nodes adjacent to the initial leak. In addition, the data determining module 44 may be further configured to compare the operation parameter of the initial leak with the operation parameter of each node adjacent to the initial leak to obtain a first score, obtain a second score according to the marking time of the initial leak and the marking time of the node marked as the leak in all the nodes adjacent to the initial leak, and obtain a final leak according to the first score and the second score.
The modules involved in the embodiments described in the present application may be implemented by software, or may be implemented by hardware. The described modules may also be provided in a processor, for example, as: a processor includes a data receiving module 41, a data processing module 42, a data acquisition module 43, and a data determination module 44. The names of these modules do not limit the module itself in some cases, and for example, the data receiving module 41 may also be described as "a module for acquiring the operation parameters of the plurality of nodes sent by the distributed optical fiber temperature measuring host 3".
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the described modules may refer to corresponding procedures in the foregoing method embodiments, which are not described herein again.
In order to better execute the program of the method, the application also provides a leakage detection device of the ground temperature field, which comprises a memory and a processor.
Wherein the memory may be used to store instructions, programs, code, sets of codes, or sets of instructions. The memory may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for at least one function, instructions for implementing the above-described ground temperature field leak detection method, and the like; the storage data area may store data and the like involved in the above-described leakage detection method of the ground temperature field.
The processor may include one or more processing cores. The processor performs the various functions of the present application and processes the data by executing or executing instructions, programs, code sets, or instruction sets stored in memory, calling data stored in memory. The processor may be at least one of an application specific integrated circuit, a digital signal processor, a digital signal processing device, a programmable logic device, a field programmable gate array, a central processing unit, a controller, a microcontroller, and a microprocessor. It will be appreciated that the electronic device for implementing the above-mentioned processor function may be other for different apparatuses, and embodiments of the present application are not specifically limited.
The present application also provides a computer-readable storage medium, for example, comprising: a U-disk, a removable hard disk, a Read Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes. The computer readable storage medium stores a computer program that can be loaded by a processor and that performs the above-described method of leak detection of a ground temperature field.
The foregoing description is only of the preferred embodiments of the present application and is presented as a description of the principles of the technology being utilized. It will be appreciated by persons skilled in the art that the scope of the disclosure referred to in this application is not limited to the specific combinations of features described above, but it is intended to cover other embodiments in which any combination of features described above or equivalents thereof is possible without departing from the spirit of the disclosure. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.
Claims (6)
1. A method for leak detection in a ground temperature field, comprising:
acquiring operation parameters of a plurality of nodes transmitted by a distributed optical fiber temperature measuring host (3), wherein the operation parameters comprise temperature, vibration frequency and pressure;
determining a node at which an abnormality occurs in at least one parameter of the temperature, the vibration frequency, and the pressure as an initial leak point, including: when the temperature exceeds a preset temperature range, judging that the temperature is abnormal; when the vibration frequency exceeds a preset vibration frequency range, judging that the vibration frequency is abnormal; when the pressure exceeds a preset pressure range, judging that the pressure is abnormal; and/or when the temperature is increased or decreased suddenly, judging that the temperature is abnormal; when the vibration frequency is suddenly increased or reduced, the judgment result is that the vibration frequency is abnormal; when the pressure is increased or decreased suddenly, the judgment result is that the pressure is abnormal;
acquiring operation parameters of each node adjacent to the initial leakage point;
determining a final leak according to the operation parameters of the initial leak and the operation parameters of each node adjacent to the initial leak, including: marking the abnormal temperature and/or abnormal vibration frequency and/or abnormal pressure as abnormal elements; acquiring a comparison element corresponding to the abnormal element from the operation parameters of each node adjacent to the initial leakage point, wherein the comparison element and the information contained by the abnormal element belong to the same category, and the category comprises a temperature type, a vibration type and a pressure type; determining a final leak point by comparing the abnormal element with the control element according to the abnormal type of the abnormal element, including: when the abnormal element is higher than a preset threshold range, the preset threshold range is one or more of a preset temperature range, a preset vibration frequency range and a preset pressure range; judging whether the following conditions are satisfied: the control element is greater than the anomaly element; if yes, the node with the comparison element larger than the abnormal element is the final leakage point; if not, the initial leakage point is the final leakage point; or when the abnormal element is lower than a preset threshold range, judging whether the abnormal element meets the following conditions: the control element is smaller than the abnormal element; if yes, the node with the comparison element larger than the abnormal element is the final leakage point; if not, the initial leakage point is the final leakage point.
2. The method for detecting a leak in a ground temperature field according to claim 1, wherein when the node at which abnormality occurs in at least one of the temperature, the vibration frequency, and the pressure is determined as an initial leak point, a mark time is also recorded, the method further comprising:
and obtaining a final leakage point according to the marking time of the initial leakage point and the marking time of the node marked as the leakage point in all nodes adjacent to the initial leakage point.
3. The method for detecting a leakage of a ground temperature field according to claim 2, wherein the obtaining a final leakage point according to the marking time of the initial leakage point and the marking time of the node marked as the leakage point in all nodes adjacent to the initial leakage point comprises:
arranging a plurality of marking times in an ascending order;
and taking the initial leak points or the leak points corresponding to the first marking time in the sequence as the final leak points.
4. A system for leak detection in a ground temperature field, comprising:
the data receiving module (41) is used for acquiring operation parameters of a plurality of nodes sent by the distributed optical fiber temperature measuring host (3), wherein the operation parameters comprise temperature, vibration frequency and pressure;
A data processing module (42) for determining a node at which an abnormality occurs in at least one of the temperature, the vibration frequency, and the pressure as an initial leak point, comprising: when the temperature exceeds a preset temperature range, judging that the temperature is abnormal; when the vibration frequency exceeds a preset vibration frequency range, judging that the vibration frequency is abnormal; when the pressure exceeds a preset pressure range, judging that the pressure is abnormal; and/or when the temperature is increased or decreased suddenly, judging that the temperature is abnormal; when the vibration frequency is suddenly increased or reduced, the judgment result is that the vibration frequency is abnormal; when the pressure is increased or decreased suddenly, the judgment result is that the pressure is abnormal:
a data acquisition module (43) for acquiring an operating parameter of each node adjacent to the initial leak point;
a data determination module (44) for determining a final leak based on the operating parameters of the initial leak and the operating parameters of each node adjacent to the initial leak, comprising: marking the abnormal temperature and/or abnormal vibration frequency and/or abnormal pressure as abnormal elements; acquiring a comparison element corresponding to the abnormal element from the operation parameters of each node adjacent to the initial leakage point, wherein the comparison element and the information contained by the abnormal element belong to the same category, and the category comprises a temperature type, a vibration type and a pressure type; determining a final leak point by comparing the abnormal element with the control element according to the abnormal type of the abnormal element, including: when the abnormal element is higher than a preset threshold range, the preset threshold range is one or more of a preset temperature range, a preset vibration frequency range and a preset pressure range; judging whether the following conditions are satisfied: the control element is greater than the anomaly element; if yes, the node with the comparison element larger than the abnormal element is the final leakage point; if not, the initial leakage point is the final leakage point; or when the abnormal element is lower than a preset threshold range, judging whether the abnormal element meets the following conditions: the control element is smaller than the abnormal element; if yes, the node with the comparison element larger than the abnormal element is the final leakage point; if not, the initial leakage point is the final leakage point.
5. A device for leak detection in a ground temperature field, comprising a memory and a processor, the memory having stored thereon a computer program, the processor, when executing the program, implementing the method of any of claims 1-3.
6. A computer readable storage medium, characterized in that a computer program is stored thereon, which program, when being executed by a processor, implements the method according to any of claims 1-3.
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