CN114838785B - Auxiliary detection device, and method and system for detecting internal layering position of oil tank - Google Patents
Auxiliary detection device, and method and system for detecting internal layering position of oil tank Download PDFInfo
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- CN114838785B CN114838785B CN202210387286.8A CN202210387286A CN114838785B CN 114838785 B CN114838785 B CN 114838785B CN 202210387286 A CN202210387286 A CN 202210387286A CN 114838785 B CN114838785 B CN 114838785B
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- 238000001514 detection method Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims description 17
- 238000009413 insulation Methods 0.000 claims abstract description 8
- 229910000838 Al alloy Inorganic materials 0.000 claims description 5
- 229910001369 Brass Inorganic materials 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910000746 Structural steel Inorganic materials 0.000 claims description 4
- 239000010951 brass Substances 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 239000011810 insulating material Substances 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 3
- 238000004321 preservation Methods 0.000 abstract description 17
- 238000003331 infrared imaging Methods 0.000 abstract description 10
- 239000003921 oil Substances 0.000 description 110
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 27
- 239000010779 crude oil Substances 0.000 description 14
- 230000000875 corresponding effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- DUEPRVBVGDRKAG-UHFFFAOYSA-N carbofuran Chemical compound CNC(=O)OC1=CC=CC2=C1OC(C)(C)C2 DUEPRVBVGDRKAG-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
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- 238000009792 diffusion process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/48—Thermography; Techniques using wholly visual means
-
- 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
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Radiation Pyrometers (AREA)
Abstract
The invention provides an auxiliary detection device, an oil tank internal layering position detection method and an oil tank internal layering position detection system. The auxiliary detection device comprises a plurality of heat conducting rods which are distributed on the side wall of the oil tank from top to bottom, and the heat conducting rods penetrate through the heat insulation layer and are connected with the tank body of the oil tank. Because the oil tank with the heat preservation can not directly observe the internal layered interface position in the oil tank through infrared imaging, the auxiliary detection device can effectively guide out the temperature of the inner wall of the tank body to the outside of the oil tank without affecting the heat preservation function of the heat preservation by arranging a plurality of heat conduction rods from top to bottom, the temperature of the heat conduction rods corresponds to the temperature of the inner wall of the oil tank at the position of the heat conduction rods, and the temperature characteristic difference of the inner wall of the oil tank can be obtained by utilizing the temperature characteristic difference of the heat conduction rods so as to facilitate the subsequent internal layered detection.
Description
Technical Field
The invention relates to the technical field of oil tank detection, in particular to an auxiliary detection device, an oil tank internal layering position detection method and an oil tank internal layering position detection system.
Background
In petrochemical industry, crude oil is stored in an oil tank, and after the crude oil in the oil tank is stabilized, the conditions of oil and water layering, gas and oil layering and the like can occur. The density of water is higher than that of oil, so that gas is in the upper layer, oil is in the middle layer, water is below the oil, and the depth of an oil-water interface, namely the position of oil-water delamination, is the most concerned by measuring staff, because the water content of the extracted crude oil can be accurately known through the data, the method has important significance for solving the water content of underground oil layers, making a crude oil production plan and the like.
In the current internal layering detection method of the oil tank, various testing instruments are installed in the oil tank to measure the internal layering interface position, such as a static pressure type liquid level meter, a float type liquid level meter and the like are installed in the oil tank to detect the oil-water layering interface position, and the liquid level meters often have the problems of low precision, complex operation, difficult calibration, poor safety, manpower maintenance instrument requirement and the like; the other is based on the principle that the temperature characteristics of an oil layer, a water layer and a gas layer are obviously different due to the fact that the specific heat capacities of the oil layer, the water layer and the gas layer are different, the infrared image of the oil tank is shot through the outside, the internal layering position detection is carried out based on the temperature characteristic difference of the oil layer, the water layer and the gas layer in the infrared image, the detection mode can simplify the detection process, the measurement accuracy is high, but for the oil tank with the heat preservation layer, the internal layering cannot be observed in the infrared image because of the existence of the heat preservation layer, and the detection cannot be carried out.
Disclosure of Invention
The invention aims at least solving the technical problems in the prior art, and particularly provides a convenient and accurate internal layering auxiliary detection device, an internal layering position detection method and a system for an oil tank with a heat preservation layer.
According to a first aspect of the invention, the invention provides an auxiliary detection device applied to an oil tank with an external heat insulation layer, comprising a plurality of heat conducting rods distributed along the axis of the side wall of the oil tank from top to bottom, wherein the heat conducting rods penetrate through the heat insulation layer and are connected with the tank body of the oil tank.
The technical scheme is as follows: because the oil tank with the heat preservation can not directly observe the internal layered interface position in the oil tank through infrared imaging, the auxiliary detection device can effectively guide out the temperature of the inner wall of the tank body to the outside of the oil tank without affecting the heat preservation function of the heat preservation by arranging a plurality of heat conduction rods from top to bottom, the temperature of the heat conduction rods corresponds to the temperature of the inner wall of the oil tank at the position of the heat conduction rods, and the temperature characteristic difference of the inner wall of the oil tank can be obtained by utilizing the temperature characteristic difference of the heat conduction rods so as to facilitate the subsequent internal layered detection. And a plurality of heat conducting rods are distributed along the axis of the oil tank, so that the distance between the heat conducting rods is consistent with the height difference between the heat conducting rods, the calculated amount for acquiring the internal layered interface position is reduced, and the measurement error is reduced.
In a preferred embodiment of the invention, the ratio of the maximum length of the heat conducting rod in the tank axis direction to the tank height is 0.025 to 0.033.
The technical scheme is as follows: the pixel area of the heat conducting rod can be effectively distinguished on infrared images when the heat conducting rod is used for infrared imaging on tank bodies with various sizes.
In a preferred embodiment of the invention, the ratio of the maximum length of the heat conducting rod in the circumferential direction of the tank to the diameter of the tank is 0.032 to 0.042.
The technical scheme is as follows: further, the pixel areas of the heat conducting rod can be effectively distinguished on infrared images when the heat conducting rod is subjected to infrared imaging on tank bodies with various sizes.
In a preferred embodiment of the invention, the ratio of the centre-to-centre distance of two adjacent heat conducting rods to the height of the tank is 0.066 to 0.1.
The technical scheme is as follows: ensure on the oil tank of various sizes, can effectively reduce or avoid carrying out the heat conduction between the heat conduction stick, improve the inside layering position detection accuracy of follow-up oil tank. In a preferred embodiment of the present invention, the diameter of the heat conductive rod is 30mm to 1000mm.
The technical scheme is as follows: the pixel region of the heat conducting rod can be conveniently identified in the subsequent infrared imaging, and the measurement accuracy is improved.
In a preferred embodiment of the present invention, the center distance between two adjacent heat conducting rods is equal to or greater than twice the diameter of the heat conducting rods.
The technical scheme is as follows: and heat conduction between the heat conducting rods is effectively reduced or avoided, and the detection accuracy of the layered position inside the subsequent oil tank is improved.
In a preferred embodiment of the present invention, the heat conducting rod is a carbon structural steel rod or a brass rod or an aluminum alloy rod.
The technical scheme is as follows: the heat conduction rods made of the materials have high heat conductivity, the temperature of the inner wall of the tank body at the position can be effectively led out, the materials are easy to obtain, and the acquisition cost can be reduced.
In a preferred embodiment of the invention, the length of the heat conducting rod is 3mm to 6mm greater than the thickness of the heat insulating layer.
The technical scheme is as follows: the imaging area of the heat conducting rod can be observed in the infrared image through infrared imaging conveniently, and the detection precision of the internal layering position is improved.
In a preferred embodiment of the invention, a heat conducting rod heat insulating material is arranged around the heat conducting rod.
The technical scheme is as follows: the heat conduction rod can reduce the speed of outward diffusion of heat of the heat conduction rod, can effectively conduct out the temperature of the inner wall of the tank body at the corresponding position, and further improves the detection precision of the internal layering position.
In a preferred embodiment of the invention, at least two position marks are provided on the outer surface of the thermal insulation layer.
The technical scheme is as follows: through the position mark, in the infrared image, the height of the inner layering distance can bottom can be obtained only according to the detected relative position of the inner layering position and the position mark, and the calculation is convenient.
In order to achieve the object of the present invention, according to a second aspect of the present invention, there is provided a method for detecting a hierarchical position inside an oil tank, comprising: acquiring an infrared image of an oil tank provided with the auxiliary detection device according to the first aspect of the present invention; acquiring a pixel area of a heat conducting rod in an infrared image; the internal layering position is obtained according to the temperature characteristic difference of the pixel areas of the plurality of heat conducting rods.
The technical scheme is as follows: because the oil tank with the heat preservation can not directly observe the internal layering interface position in the oil tank through infrared imaging, the auxiliary detection device is provided with a plurality of heat conducting rods from top to bottom, the temperature of the inner wall of the tank body is effectively led out of the oil tank when the heat preservation function of the heat preservation is not affected, the temperature of the heat conducting rods corresponds to the temperature of the inner wall of the oil tank where the heat conducting rods are positioned, the temperature characteristic difference of the inner wall of the oil tank can be obtained by utilizing the temperature characteristic difference of the plurality of heat conducting rods, the temperature difference of the plurality of heat conducting rods can be accurately displayed through infrared imaging, the internal layering position of the oil tank can be quickly obtained according to the temperature difference, and the non-contact type internal layering detection of the oil tank with the heat preservation is realized.
In a preferred embodiment of the present invention, the obtaining the internal layering position according to the temperature characteristic difference of the pixel regions of the plurality of heat conductive rods specifically includes: and acquiring the temperature average value of the pixel area of each heat conducting rod, setting a temperature difference threshold value, and if the difference between the temperature average values of the pixel areas of two adjacent heat conducting rods is greater than or equal to the temperature difference threshold value, considering that an internal layering interface exists between the two adjacent heat conducting rods.
The technical scheme is as follows: and rapidly judging the internal layering position according to the difference between the average temperatures of the pixel areas of each heat conducting rod.
In a preferred embodiment of the present invention, the obtaining the internal layering position according to the temperature characteristic difference of the pixel areas of the plurality of heat conductive rods specifically includes: acquiring the temperature average value of the pixel area of each heat conducting rod; solving the variance of the temperature average value of the pixel areas of two adjacent heat conducting rods from top to bottom or from bottom to top, and marking the variance as a first variance; and if the first variance of the two adjacent heat conducting rods is larger than or equal to the variance threshold, an internal layering interface is considered to exist between the two adjacent heat conducting rods.
The technical scheme is as follows: in practice, the temperature change of the upper and lower layers of the internal layering interface of the oil tank is not obvious, but a certain error exists in the oil-water dividing line according to the temperature difference, based on the certain error, the variance of the temperature average value of the pixel areas of the adjacent heat conducting bars, namely the first variance, is calculated, the first variance can reflect the change difference of the temperature values of the pixel points of the pixel areas of the adjacent two heat conducting bars, and the error can be effectively reduced and the detection accuracy can be improved by detecting the internal layering position through the first variance.
In order to achieve the object of the present invention, according to a third aspect of the present invention, there is provided an internal layered position detection apparatus for an oil tank, comprising: the infrared image acquisition module is used for acquiring an infrared image of the oil tank provided with the auxiliary detection device according to the first aspect of the invention; the heat conducting rod pixel region acquisition module acquires a pixel region of a heat conducting rod in an infrared image; and the internal layering position acquisition module is used for acquiring the internal layering positions according to the temperature characteristic differences of the pixel areas of the plurality of heat conducting rods.
To achieve the object of the present invention, according to a fourth aspect of the present invention, there is provided a computer-readable storage medium having stored therein at least one instruction, at least one program, a code set, or an instruction set, which is loaded and executed by a processor to implement the tank interior hierarchical position detection method according to the second aspect of the present invention.
Drawings
FIG. 1 is a schematic diagram of the auxiliary detecting device in embodiment 1 of the present invention;
FIG. 2 is a schematic flow chart of a method for detecting the internal layering position of an oil tank in embodiment 2 of the present invention;
fig. 3 is an infrared image of the oil tank mounted with the auxiliary detecting device in embodiment 1 of the present invention.
Reference numerals:
1, an oil tank; 2, a heat conducting rod; 3 position marks.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise specified and defined, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, mechanical or electrical, or may be in communication with each other between two elements, directly or indirectly through intermediaries, as would be understood by those skilled in the art, in view of the specific meaning of the terms described above.
Example 1
The embodiment discloses an auxiliary detection device, is applied to the oil tank 1 that is equipped with the heat preservation in the outside, as shown in fig. 1, includes a plurality of top-down along the heat conduction stick 2 of oil tank 1 lateral wall axis distribution, and heat conduction stick 2 passes the heat preservation and is connected with oil tank 1 jar body. Preferably, the heat insulation layer is provided with mounting holes corresponding to the positions of the heat conducting rods 2 one by one in advance, and the heat conducting rods 2 are directly inserted into the corresponding mounting holes to be connected with the tank body of the oil tank 1. The heat conducting rods 2 are preferably, but not exclusively, connected to the tank body of the tank 1 by means of welding or bonding. It is further preferred that the bonding of the bottom of the heat conducting rod 2 to the tank body of the tank 1 is achieved by a casting glue, preferably but not limited to a carbofuran ab glue, in order to enable a close fitting of the heat conducting rod 2 to the tank wall and an increased resistance to high temperatures and an increased heat conductivity. The plurality of heat conductive rods 2 may be distributed from top to bottom along the same axis, or may be distributed from top to bottom along one axis in part and from top to bottom along another axis in part.
In the present embodiment, the cross-sectional shape of the heat conductive rod 2 is preferably but not limited to a circular shape or an elliptical shape, or a polygonal shape, which may be a triangle, a quadrangle, a pentagon, a hexagon, etc., or an irregular shape, which may be a semicircle, a V-shape, a heart, etc.
In the present embodiment, it is further preferable that the ratio of the maximum length of the heat conductive rod 2 in the axial direction of the oil tank 1 to the height of the oil tank 1 is 0.025 to 0.033. The maximum length of the heat conducting rod 2 in the axial direction of the oil tank 1 is the projection length of the heat conducting rod 2 in the axial direction of the oil tank 1, and when the cross-sectional shape of the heat conducting rod 2 is circular, the maximum length of the heat conducting rod 2 in the axial direction of the oil tank 1 is the diameter of the heat conducting rod 2, and the ratio of the diameter to the height of the oil tank 1 is in the range of 0.025 to 0.033. When the cross-sectional shape of the heat conduction rod 2 is rectangular, the length of the rectangle is the same as the axial direction of the oil tank 1, and the maximum length of the heat conduction rod 2 in the axial direction of the oil tank 1 is the length of the rectangle, and the ratio of the length to the height of the oil tank 1 is in the range of 0.025 to 0.033.
In the present embodiment, it is further preferable that the ratio of the maximum length of the heat conductive rod 2 in the circumferential direction of the oil tank 1 to the diameter of the oil tank 1 is 0.032 to 0.042. The maximum length of the heat conducting rod 2 in the circumferential direction of the oil tank 1 is the projection length of the heat conducting rod 2 in the circumferential direction of the oil tank 1, and when the cross-sectional shape of the heat conducting rod 2 is circular, the maximum length of the heat conducting rod 2 in the circumferential direction of the oil tank 1 is the diameter of the heat conducting rod 2, and the ratio of the diameter to the height of the oil tank 1 is in the range of 0.025 to 0.033. When the cross-sectional shape of the heat conduction rod 2 is rectangular, the length of the rectangle is the same as the axial direction of the oil tank 1, and the maximum length of the heat conduction rod 2 in the circumferential direction of the oil tank 1 is the width of the rectangle, and the ratio of the width to the diameter of the oil tank 1 ranges from 0.032 to 0.042.
In the present embodiment, it is further preferable that the ratio of the center distance of the adjacent two heat conductive rods 1 to the height of the oil tank 1 is 0.066 to 0.1.
In the present embodiment, it is further preferable that the diameter of the heat conductive rod 2 is 30mm to 1000mm. Specifically, the diameter of the heat conduction rod 2 is related to whether or not the pixel region of the heat conduction rod 2 can be effectively recognized in the infrared imaging image, for example, when the infrared imaging is performed at a distance of up to 16 meters from the oil tank 1, the diameter of the heat conduction rod 2 can be set to 800mm so that the pixel region of the heat conduction rod 2 can be effectively recognized from the infrared image. When the size of the oil tank 1 is small, such as 1167mm in diameter and 1500mm in height, the diameter of the heat conductive rod 2 may be set to 38mm to 50mm. Of course, the diameter of the heat conducting rod 2 may be 500mm, 600mm, 1000mm, etc. depending on the size of the oil tank 1.
In this embodiment, it is further preferable that, in order to prevent crosstalk caused by heat conduction of the adjacent heat conducting rods 2, the accuracy of detecting the layered interface position is affected, and specifically, the center distance between the adjacent two heat conducting rods 2 is equal to or greater than twice the diameter of the heat conducting rods 2, and the center distance between the adjacent two heat conducting rods 2 can be achieved by controlling the center distance between the adjacent two mounting holes, for example, when the diameter of the heat conducting rod 2 is 500mm, the center distance between the adjacent two heat conducting rods 2 or the center distance between the adjacent two mounting holes is equal to or greater than 1000mm. The center distance is the distance between the center points of the two heat conducting rods 2 or the distance between the center points of the two mounting holes.
In the present embodiment, it is further preferable that the heat conductive rod 2 is a carbon structural steel rod or a brass rod or an aluminum alloy rod. The carbon structural steel is preferably but not limited to Q235 steel or 45# steel, the brass is preferably but not limited to H62, and the aluminum alloy is preferably but not limited to 5052 aluminum alloy.
In the present embodiment, it is further preferable that the length of the heat conductive rod 2 is greater than the thickness of the heat insulating layer by 3mm to 6mm, and it is further preferable that the length of the heat conductive rod 2 is greater than the thickness of the heat insulating layer by 5mm.
In this embodiment, it is further preferable that, as shown in fig. 1, at least two position marks 3 are provided on the outer surface of the heat-insulating layer, the position marks 3 are objects having a specific heat different from that of the heat-insulating layer, such as metal strips or metal sheets, and in the infrared image, the temperature of the position marks 3 is significantly different from that of the surrounding heat-insulating layer, so that the pixel areas of the position marks 3 are identified.
In the present embodiment, it is further preferable that a heat conductive rod insulating material is provided around the heat conductive rod 2. The heat-conducting rod heat-insulating material is preferably, but not limited to, polyethylene, and can prevent crosstalk caused by heat conduction of the adjacent heat-conducting rods 2 while insulating the heat-conducting rods 2.
In this embodiment, it is further preferable to include a plurality of groups of heat conducting rods 2, each group of heat conducting rods 2 includes a plurality of heat conducting rods 2 distributed on one axis of the side wall of the oil tank 1 from top to bottom, the plurality of groups of heat conducting rods 2 are respectively distributed on different axes, each group of heat conducting rods 2 can obtain an internal layered interface, and mutual verification is performed through the internal layered interfaces obtained by the plurality of groups of heat conducting rods 2, so as to improve the detection accuracy of the layered interfaces.
Example 2
The embodiment discloses a method for detecting the internal layering position of an oil tank, as shown in fig. 2, comprising the following steps:
step S1, acquiring an infrared image of the oil tank 1 mounted with the auxiliary detection apparatus in embodiment 1. The oil tank 1 may be acquired by an infrared camera, preferably by a robot loaded with an infrared camera. For the oil tank 1 with the heat preservation layer in the victory oil field, the diameter of the oil tank 1 is 25 meters, the height is 12 meters, the thickness of the heat preservation layer is 8cm, and the shooting distance of the robot can be 16 meters. As shown in fig. 3, the infrared image of the oil tank 1 taken when the robot takes a distance of 16 meters is obtained, and it can be seen from the figure that the heat conducting rod 2 can effectively derive the trend of the temperature change of the inner wall of the oil tank 1.
Step S2, obtaining a pixel area of the heat conducting rod 2 in the infrared image. A mask can be arranged to identify the pixel areas of the heat conducting rods 2 in the infrared image, the shape and the size of the mask are matched with those of the heat conducting rods 2, if the mask is set to be round, the radius of the mask is the same as that of the heat conducting rods 2, and the existing mask segmentation method is utilized to segment the pixel areas of all the heat conducting rods 2 in the infrared image. For another example, the pixel value of the pixel point in the infrared image is the temperature value of the object at the position corresponding to the pixel point, and because the temperature of the heat conducting rod 2 is higher than the temperature of the heat insulation layer, a global temperature threshold can be set, the pixel points with the pixel value smaller than the global temperature threshold are filtered, the rest pixel points are the pixel areas of the heat conducting rod 2, and the global temperature threshold is preferably but not limited to the pixel average value of the infrared image.
Step S3, obtaining the internal layering position according to the temperature characteristic difference of the pixel areas of the plurality of heat conducting rods 2.
In this embodiment, preferably, step S3 specifically includes: acquiring the temperature average value of the pixel area of each heat conducting rod 2, specifically, calculating the pixel average value of the pixel area of the heat conducting rod 2, and taking the pixel average value as the temperature average value of the pixel area of the heat conducting rod 2; if there is a difference between the average temperatures of the pixel areas of the two adjacent heat conducting rods 2 equal to or greater than the temperature difference threshold, it is considered that an internal layered interface exists between the two adjacent heat conducting rods 2, and the center point of the two adjacent heat conducting rods 2 is preferably but not limited to be the position of the internal layered interface. The temperature average value and the temperature difference threshold value of the adjacent heat conducting rods 2 can be compared and judged in a sliding manner from top to bottom or from bottom to top. The oil tank 1 storing crude oil may have 4 internal layered interfaces distributed from top to bottom, the first internal layered interface is a layered interface of air and water vapor inside the oil tank 1 (the water vapor is generated by evaporation of crude oil), the second internal layered interface is a layered interface of water vapor and oil inside the oil tank 1, the third internal layered interface is a layered interface of oil and water inside the oil tank 1, and the fourth internal layered interface is a layered interface of water and impurities such as crushed stone inside the oil tank 1. After the positions of the internal layered interfaces are obtained, the temperature difference between water and oil is the largest, and among the internal layered interfaces, the layered interface with the largest temperature average value difference is selected as an oil-water layered interface, and then the positions of other layered interfaces are determined according to the height relation of each layered interface.
In this embodiment, the temperature difference threshold may be set in advance, and in order to improve the accuracy of the detection of the layered interface, it is further preferred that the magnitude of the temperature difference threshold is positively correlated with the temperature of the crude oil, and the greater the temperature of the crude oil, the greater the temperature difference threshold should be set, because the greater the temperature difference between the oil, water, and gas is at this time. The crude oil temperature can be obtained by a temperature sensor provided on the crude oil input pipeline of the oil tank 1.
Example 3
The embodiment discloses a method for detecting a layered position inside an oil tank, which comprises a step S1, a step S2 and a step S3, wherein the step S1 and the step S2 are consistent with the embodiment 2, the step S3 is different from the embodiment 2, and the step S3 specifically comprises the following steps:
acquiring the temperature average value of the pixel area of each heat conducting rod 2, specifically, calculating the pixel average value of the pixel area of the heat conducting rod 2, and taking the pixel average value as the temperature average value of the pixel area of the heat conducting rod 2;
the variance of the temperature average value of the pixel regions of the two adjacent heat conduction rods 2 is obtained from top to bottom or from bottom to top, and is recorded as the first variance, and specifically, the first variance of the two adjacent heat conduction rods 2 is obtained from top to bottom or from bottom to top in a sliding manner. Let K heat conductive bars 2,K be a positive integer greater than 2, K denote the index of heat conductive bars 2, k=1, 2, … …, (K-1). The first variance between the adjacent kth and kth+1th heat conductive rods 2 is:
if the first difference between two adjacent heat conduction rods 2 is equal to or greater than the variance threshold H, then it is considered that there is a gap between the two adjacent heat conduction rods 2At an internal hierarchical interface. In particular, ifIt is considered that there is an inner layered interface between the kth and the (k+1) th heat conductive rods 2, preferably the height of the inner layered interface is: />h k Represents the true height h of the center point of the kth heat conducting rod 2 from the bottom of the oil tank 1 k+1 The true height of the k+1th heat conducting rod 2 from the center point of the oil tank 1 bottom is shown. Can measure h when auxiliary detection device installs and accomplishes k And h k+1 Numerical values are stored; the true heights of the two position marks 3 from the bottom of the oil tank 1 can be stored in advance, and the true heights of the kth and the kth+1th heat conducting rods 2 from the bottom of the oil tank 1 can be obtained through conversion by combining the distance relation between the center points of the pixel areas of the kth and the kth+1th heat conducting rods 2 in the infrared image and the two position marks 3.
In this embodiment, there may be 4 internal layered interfaces distributed from top to bottom in the oil tank 1 for storing crude oil, the first internal layered interface is a layered interface of air and water vapor (generated by evaporation of crude oil) in the oil tank 1, the second internal layered interface is a layered interface of water vapor and oil in the oil tank 1, the third internal layered interface is a layered interface of oil and water in the oil tank 1, and the fourth internal layered interface is a layered interface of water and impurities such as crushed stone in the oil tank 1. After the positions of the internal layered interfaces are obtained, the temperature difference between water and oil is the largest, and among the internal layered interfaces, the layered interface with the largest first difference is used as an oil-water layered interface, and then the positions of other layered interfaces are determined according to the height relation of each layered interface.
In this embodiment, the variance threshold may be set in advance, and it is further preferable that the magnitude of the variance threshold is positively correlated with the crude oil temperature, and the larger the crude oil temperature is, the larger the variance threshold is set, because the temperature difference between oil, water, and gas is larger at this time.
Example 4
The embodiment discloses an inside layering position detection device of oil tank, includes: an infrared image acquisition module for acquiring an infrared image of the oil tank 1 mounted with the auxiliary detection apparatus in embodiment 1; the pixel region acquisition module of the heat conduction rod 2 acquires a pixel region of the heat conduction rod 2 in the infrared image; and an internal layering position acquisition module for acquiring the internal layering positions according to the temperature characteristic differences of the pixel areas of the plurality of heat conducting rods 2.
Example 5
The present embodiment discloses a computer-readable storage medium in which at least one instruction, at least one program, a code set, or an instruction set is stored, the at least one instruction, the at least one program, the code set, or the instruction set being loaded and executed by a processor to implement the method for detecting the internal hierarchical position of the oil tank 1 as provided in embodiment 2.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. The method for detecting the layering position inside the oil tank is applied to the oil tank with the heat insulation layer outside, and is characterized in that the auxiliary detection device comprises a plurality of heat conducting rods distributed along the axis of the side wall of the oil tank from top to bottom, the heat conducting rods penetrate through the heat insulation layer to be connected with the tank body of the oil tank, and the heat conducting rods effectively guide out the temperature of the inner wall of the tank body to the outside of the oil tank;
the method for detecting the layering position inside the oil tank comprises the following steps:
acquiring an infrared image of the oil tank provided with the auxiliary detection device;
acquiring a pixel area of a heat conducting rod in an infrared image;
obtaining an internal layering position according to a temperature characteristic difference of pixel areas of the plurality of heat conducting rods, comprising:
acquiring the temperature average value of the pixel area of each heat conducting rod;
calculating the variance of the average temperature values of the pixel areas of two adjacent heat conducting bars from top to bottom or from bottom to top, marking the variance as a first variance, setting K heat conducting bars, wherein K is a positive integer greater than 2, K represents the index of the heat conducting bars, k=1, 2, … …, (K-1), and the first variance between the K and k+1th heat conducting bars is as follows:
T k a temperature average value of the pixel region of the kth heat conductive rod is represented; t (T) k+1 A temperature average value of the pixel region of the (k+1) th heat conductive rod;
and if the first variance of the two adjacent heat conducting rods is larger than or equal to the variance threshold, an internal layering interface is considered to exist between the two adjacent heat conducting rods.
2. The method for detecting the internal layering position of a tank for an auxiliary detecting device according to claim 1, wherein the ratio of the maximum length of the heat conductive rod in the tank axial direction to the tank height is 0.025 to 0.033;
and/or the ratio of the maximum length of the heat conducting rod in the circumferential direction of the oil tank to the diameter of the oil tank is 0.032 to 0.042;
and/or the ratio of the center distance of two adjacent heat conducting rods to the height of the oil tank is 0.066 to 0.1.
3. The method for detecting the internal layering position of an oil tank for an auxiliary detecting apparatus according to claim 1, wherein the diameter of the heat conducting rod is 30mm to 1000mm;
and/or the center distance between two adjacent heat conducting rods is greater than or equal to two times of the diameter of the heat conducting rods.
4. A method for detecting the internal layering position of an oil tank for an auxiliary detecting device according to claim 1,2 or 3, wherein the length of the heat conducting rod is 3mm to 6mm greater than the thickness of the insulating layer;
and/or the heat conducting rod is a carbon structural steel rod or a brass rod or an aluminum alloy rod.
5. A method for detecting the internal layering position of an oil tank for an auxiliary detecting device according to claim 1,2 or 3, wherein a heat conducting rod heat insulating material is provided around the heat conducting rod;
and/or at least two position marks are arranged on the outer surface of the heat-insulating layer.
6. An internal tank layered position detection apparatus for realizing the internal tank layered position detection method for an auxiliary detection apparatus as defined in any one of claims 1 to 5, comprising:
an infrared image acquisition module for acquiring an infrared image of an oil tank to which the auxiliary detection device according to any one of claims 1 to 5 is attached;
the heat conducting rod pixel region acquisition module acquires a pixel region of a heat conducting rod in an infrared image;
and the internal layering position acquisition module is used for acquiring the internal layering positions according to the temperature characteristic differences of the pixel areas of the plurality of heat conducting rods.
7. A computer readable storage medium having stored therein at least one instruction, at least one program, code set, or instruction set, the at least one instruction, the at least one program, the code set, or instruction set being loaded and executed by a processor to implement the method for tank interior hierarchical position detection for an auxiliary detection apparatus according to any one of claims 1-5.
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Denomination of invention: An auxiliary detection device, a method and system for detecting the internal layering position of oil tanks Granted publication date: 20231117 Pledgee: Industrial and Commercial Bank of China Limited Chongqing Liangjiang Branch Pledgor: Seven Teng Robot Co.,Ltd. Registration number: Y2024980010233 |
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