CN114838785A - Auxiliary detection device, and method and system for detecting position of part of oil tank inner part - Google Patents
Auxiliary detection device, and method and system for detecting position of part of oil tank inner part Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000009413 insulation Methods 0.000 claims abstract description 11
- 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
- 239000012774 insulation material Substances 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 3
- 238000003475 lamination Methods 0.000 claims 4
- 238000004321 preservation Methods 0.000 abstract description 13
- 238000003331 infrared imaging Methods 0.000 abstract description 10
- 239000003921 oil Substances 0.000 description 111
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 26
- 239000010779 crude oil Substances 0.000 description 14
- 230000000875 corresponding effect Effects 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
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- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000926 separation method Methods 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
- 230000004075 alteration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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- 238000003384 imaging method Methods 0.000 description 1
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- 229920000573 polyethylene Polymers 0.000 description 1
- 239000009671 shengli Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
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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
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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
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention provides an auxiliary detection device, and a method and a system for detecting the position of a part of a stratum in an oil tank. The auxiliary detection device comprises a plurality of heat conducting rods distributed on the side wall of the oil tank from top to bottom, and the heat conducting rods penetrate through the heat insulation layer to be connected with the oil tank body. Because the oil tank with the heat preservation layer can not directly observe the position of the internal layered interface in the oil tank through infrared imaging, the auxiliary detection device is provided with a plurality of heat conduction rods from top to bottom, the temperature of the inner wall of the tank body is effectively guided out of the oil tank while the heat preservation function of the heat preservation layer is not influenced, 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 that the subsequent internal layered detection is facilitated.
Description
Technical Field
The invention relates to the technical field of oil tank detection, in particular to an auxiliary detection device, and a method and a system for detecting the position of a part of a stratum in an oil tank.
Background
In the 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 separation, gas and oil separation and the like can occur. The density of water is greater than oil, so gas is in the upper strata, and oil is in the middle level, and water is below oil, and the measurement personnel are the depth of oil-water interface most concerned, the position of oil-water stratification promptly, because can accurately know the water content of the crude oil of adopting through this data, this is to understanding underground oil reservoir water content, formulating crude oil production plan etc. and is of great significance.
In the current oil tank internal layered detection method, one is to install various testing instruments inside the oil tank to measure the internal layered interface position, for example, to install static pressure type level gauge, float type level gauge and float type level gauge in the oil tank to detect the oil-water layered interface position, these level gauges often have the problems of low precision and complex operation, difficult calibration and poor safety, and need to manually maintain the instruments; the other type 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 different specific heat capacities of the oil layer, the water layer and the gas layer, and the infrared image of the oil tank is shot through the outside.
Disclosure of Invention
The invention aims to at least solve the technical problems in the prior art, and particularly provides a convenient and accurate internal layering auxiliary detection device, a method and a system for detecting the position of an internal layering in an oil tank, aiming at the oil tank with a heat preservation layer.
In order to achieve the purpose, according to a first aspect of the invention, the invention provides an auxiliary detection device which is applied to an oil tank with an external thermal insulation layer, and comprises 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 thermal insulation layer and are connected with an oil tank body.
The technical scheme is as follows: because the oil tank with the heat preservation layer can not directly observe the position of the internal layered interface in the oil tank through infrared imaging, the auxiliary detection device is provided with a plurality of heat conduction rods from top to bottom, the temperature of the inner wall of the tank body is effectively guided out of the oil tank while the heat preservation function of the heat preservation layer is not influenced, 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 that the subsequent internal layered detection is facilitated. And the 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 calculation amount for obtaining the internal layered interface position is reduced, and the measurement error is reduced.
In a preferred embodiment of the present invention, 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.
The technical scheme is as follows: the pixel area of the heat conducting rod can be effectively distinguished on an infrared image when the heat conducting rod is subjected to infrared imaging on the tank bodies with various sizes.
In a preferred embodiment of the present invention, the ratio of the maximum length of the heat-conducting rod to the diameter of the tank in the circumferential direction of the tank is 0.032 to 0.042.
The technical scheme is as follows: further ensure that the heat conduction stick can effectively distinguish the pixel area of the heat conduction stick on the infrared image when the infrared imaging is carried out on the tank bodies with various sizes.
In a preferred embodiment of the invention, the ratio of the center-to-center distance between two adjacent heat conducting rods to the height of the oil tank is 0.066 to 0.1.
The technical scheme is as follows: the heat conduction between the heat conducting rods can be effectively reduced or avoided on the oil tanks with various sizes, and the detection accuracy of the internal layered position of the subsequent oil tank is improved. In a preferred embodiment of the invention, the diameter of the heat conducting rod is 30mm to 1000 mm.
The technical scheme is as follows: the pixel area of the heat conducting rod can be conveniently identified in subsequent infrared imaging, and the measurement accuracy is improved.
In a preferred embodiment of the present invention, the center-to-center distance between two adjacent heat conduction rods is equal to or greater than twice the diameter of the heat conduction rods.
The technical scheme is as follows: effectively reduce or avoid carrying out heat conduction between the heat conduction stick, improve follow-up oil tank inside layering position and detect the accuracy.
In a preferred embodiment of the invention, the heat conducting rods are carbon structural steel rods or brass rods or aluminum alloy rods.
The technical scheme is as follows: the heat conducting 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 to the outside, and the materials are easy to obtain, so that the acquisition cost can be reduced.
In a preferred embodiment of the present invention, the length of the heat conducting rod is 3mm to 6mm greater than the thickness of the insulating layer.
The technical scheme is as follows: the imaging area of the heat conducting rod can be observed in an infrared image conveniently and subsequently through infrared imaging, and the detection precision of the position of the inner part layer is improved.
In a preferred embodiment of the present invention, a heat conducting rod thermal insulation material is provided around the heat conducting rod.
The technical scheme is as follows: the speed of heat conduction stick heat outdiffusion can be reduced, the temperature of the inner wall of the tank body at the corresponding position can be effectively conducted, and the detection precision of the internal layered position is further improved.
In a preferred embodiment of the present invention, at least two position marks are provided on the outer surface of the insulation layer.
The technical scheme is as follows: through the position mark, in the infrared image, the height of the inner part layer from the tank bottom can be obtained according to the detected relative position of the inner part layer and the position mark, and calculation is facilitated.
To achieve the object, according to a second aspect of the present invention, there is provided a method for detecting a position of a partial layer in an oil tank, comprising: acquiring an infrared image of an oil tank provided with the auxiliary detection device of the first aspect of the invention; acquiring a pixel area of a heat conducting rod in an infrared image; and obtaining the position of the internal part layer 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 layer can not directly observe the position of the internal layered interface in the oil tank through infrared imaging, the auxiliary detection device is provided with a plurality of heat conduction rods from top to bottom, the temperature of the inner wall of the tank body is effectively guided out of the oil tank while the heat preservation function of the heat preservation layer is not influenced, 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, 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, the temperature difference of the heat conduction rods can be accurately shown through infrared imaging, the internal layered position in the oil tank can be quickly obtained according to the temperature difference, and the non-contact type internal layered detection of the oil tank with the heat preservation layer is realized.
In a preferred embodiment of the present invention, obtaining the internal layered position according to the temperature characteristic difference of the pixel regions of the plurality of heat conduction rods specifically includes: acquiring the average temperature value of the pixel area of each heat conduction rod, setting a temperature difference threshold value, and if the difference between the average temperature values of the pixel areas of two adjacent heat conduction rods is larger than or equal to the temperature difference threshold value, determining that an internal layered interface exists between the two adjacent heat conduction rods.
The technical scheme is as follows: and quickly judging the position of the internal part layer according to the difference between the temperature average values of the pixel areas of each heat conducting rod.
In a preferred embodiment of the present invention, the obtaining of the internal layered position according to the temperature characteristic difference of the pixel regions of the plurality of heat conduction rods specifically includes: acquiring the average temperature value of the pixel area of each heat conduction rod; calculating the variance of the temperature average values of the pixel areas of two adjacent heat-conducting rods from top to bottom or from bottom to top, and recording the variance as a first variance; and if the first variance of two adjacent heat conducting rods is larger than or equal to the variance threshold value, determining that an internal layered interface exists between the two adjacent heat conducting rods.
The technical scheme is as follows: in practice, temperature changes above and below a layered interface inside the oil tank are not obvious, but certain errors exist in an oil-water boundary line judged from the temperature difference, based on the certain errors, the variance of the average temperature value of the pixel areas of the adjacent heat conducting rods, 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 two adjacent heat conducting rods, errors can be effectively reduced by detecting the position of the inner part layer through the first variance, and the detection accuracy is improved.
To achieve the object, according to a third aspect of the present invention, there is provided an in-tank layered position detecting apparatus comprising: an infrared image acquisition module, configured to acquire an infrared image of an oil tank in which the auxiliary detection device according to the first aspect of the present invention is disposed; the heat conduction rod pixel area acquisition module is used for acquiring the pixel area of the heat conduction rod in the infrared image; and the internal part layer position acquisition module is used for acquiring the internal part layer position according to the temperature characteristic difference of the pixel areas of the plurality of heat conduction rods.
To achieve the object, 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 set of codes, or a set of instructions, which is loaded and executed by a processor to implement the tank internal layered position detecting method according to the second aspect of the present invention.
Drawings
FIG. 1 is a schematic structural diagram of an auxiliary detecting device in embodiment 1 of the present invention;
FIG. 2 is a schematic flow chart of a method for detecting the internal layered position of an oil tank in embodiment 2 of the present invention;
fig. 3 is an infrared image of an oil tank equipped with an auxiliary detection device in embodiment 1 of the present invention.
Reference numerals:
1, an oil tank; 2, heat conducting rods; 3 position marking.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
Example 1
The embodiment discloses an auxiliary detection device, is applied to oil tank 1 that the outside is equipped with the heat preservation, as shown in fig. 1, includes a plurality of top-down along the heat conduction stick 2 of 1 lateral wall axis distribution of oil tank, and heat conduction stick 2 passes the heat preservation and is connected with 1 jar of body of oil tank. Preferably, the heat-insulating 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 rod 2 is connected with the tank body of the oil tank 1 by means of welding or bonding. Further preferably, in order to make the heat conducting rod 2 and the tank wall tightly fit, and increase high temperature resistance and heat conductivity, the bottom of the heat conducting rod 2 and the tank body of the oil tank 1 are bonded by casting glue, and the casting glue is preferably, but not limited to, Kafter casting glue ab glue. The heat conducting rods 2 can be distributed from top to bottom along the same axis, or one part of the heat conducting rods can be distributed from top to bottom along one axis, and the other part of the heat conducting rods can be distributed from top to bottom along the other axis.
In the present embodiment, the cross-sectional shape of the heat conduction rod 2 is preferably, but not limited to, a circle or an ellipse, or a polygon or an irregular shape, the polygon may be a triangle, a quadrangle, a pentagon, a hexagon, etc., and the irregular shape may be a semicircle, a V, 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, when the cross section 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 ranges from 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, 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, 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 ranges from 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, 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 is in the range of 0.032 to 0.042.
In the present embodiment, it is further preferable that the ratio of the center-to-center distance between two adjacent heat conduction 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 conduction rod 2 is 30mm to 1000 mm. Specifically, the diameter of the heat conduction rod 2 is related to whether the pixel area of the heat conduction rod 2 can be effectively identified in the infrared imaging image, for example, when the infrared imaging is performed at a distance of 16 meters from the oil tank 1, the diameter of the heat conduction rod 2 can be set to 800mm, so that the pixel area of the heat conduction rod 2 can be effectively identified from the infrared image. When the oil tank 1 is small in size, for example, 1167mm in diameter and 1500mm in height, the diameter of the heat conduction rod 2 may be set to 38mm to 50 mm. Of course, the diameter of the heat conducting rod 2 may be set to 500mm, 600mm, 1000mm, or the like, depending on the size of the oil tank 1.
In this embodiment, it is further preferable that, in order to prevent the adjacent heat conduction rods 2 from generating crosstalk due to heat conduction and affecting the accuracy of detection of the layered interface position, the center distance between two adjacent heat conduction rods 2 is greater than or equal to twice the diameter of the heat conduction rods 2, and specifically, the center distance between two adjacent heat conduction rods 2 can be realized by controlling the center distance between two adjacent mounting holes, for example, when the diameter of the heat conduction rod 2 is 500mm, the center distance between two adjacent heat conduction rods 2 or the center distance between two adjacent mounting holes is greater than or equal to 1000 mm. 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 conduction 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 conduction rod 2 is 3mm to 6mm greater than the thickness of the heat insulation layer, and it is further preferable that the length of the heat conduction rod 2 is 5mm greater than the thickness of the heat insulation layer.
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 insulating layer, the position marks 3 are objects with different specific heat from the insulating layer, such as metal strips or metal sheets, and in the infrared image, the temperature of the position mark 3 is significantly different from the temperature of the surrounding insulating layer, so as to identify the pixel region of the position mark 3.
In the present embodiment, it is further preferable that a heat conduction rod thermal insulation material is provided around the heat conduction rod 2. The heat conducting rod thermal insulation 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 that the oil tank includes multiple groups of heat conducting rods 2, each group of heat conducting rods 2 includes multiple heat conducting rods 2 distributed on an axis of a side wall of the oil tank 1 from top to bottom, the multiple 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 the internal layered interfaces obtained through the multiple groups of heat conducting rods 2 are verified mutually to improve the detection accuracy of the layered interfaces.
Example 2
The present embodiment discloses a method for detecting a layered position inside an oil tank, as shown in fig. 2, including:
in step S1, an infrared image of the oil tank 1 to which the auxiliary detection device of example 1 is attached is acquired. The tank 1 may be captured by an infrared camera, and preferably, may be photographed by a robot equipped with an infrared camera. For the oil tank 1 with the heat insulation layer in the Shengli oil field, the diameter of the oil tank 1 is 25 meters, the height of the oil tank is 12 meters, the thickness of the heat insulation layer is 8cm, and the shooting distance of the robot can be 16 meters. As shown in fig. 3, the robot photographs an infrared image of the oil tank 1 taken at a distance of 16 m, and it can be seen from the figure that the heat conduction rod 2 can effectively derive the temperature variation trend of the inner wall of the oil tank 1.
In step S2, the pixel area of the heat conduction rod 2 in the infrared image is acquired. The mask can be set to identify the pixel area of the heat conducting rod 2 in the infrared image, the shape and the size of the mask are matched with those of the heat conducting rod 2, if the mask is set to be circular, the radius of the mask is the same as that of the heat conducting rod 2, and the pixel area of all the heat conducting rods 2 in the infrared image is divided by using the existing mask dividing method. For another example, the pixel value of a pixel point in the infrared image is the temperature value of an object at a position corresponding to the pixel point, and since the temperature of the heat conduction rod 2 is higher than the temperature of the heat insulation layer, a global temperature threshold value can be set, the pixel point with the pixel value smaller than the global temperature threshold value is filtered, the remaining pixel points are pixel areas of the heat conduction rod 2, and the global temperature threshold value is preferably, but not limited to, the pixel average value of the infrared image.
In step S3, the internal partial layer position is obtained from the temperature characteristic difference of the pixel regions of the plurality of heat conductive rods 2.
In this embodiment, preferably, step S3 specifically includes: acquiring the average temperature value of the pixel area of each heat conduction rod 2, specifically, calculating the average pixel value of the pixel area of each heat conduction rod 2, and taking the average pixel value as the average temperature value of the pixel area of each heat conduction rod 2; setting a temperature difference threshold value, and if the difference between the average temperature values of the pixel areas of two adjacent heat-conducting rods 2 is greater than or equal to the temperature difference threshold value, then considering that an internal layered interface exists between the two adjacent heat-conducting rods 2, preferably but not limited to taking the center point of the two adjacent heat-conducting rods 2 as the internal layered interface position. The average temperature 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. 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 (the water vapor is generated by evaporation of crude oil) inside the oil tank 1, 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 stones and the like inside the oil tank 1. After obtaining the multiple internal part-layer interface positions, selecting the layered interface with the largest temperature average value difference as an oil-water layered interface from the multiple internal part-layer interfaces because the temperature difference between water and oil is the largest, and determining the positions of other layered interfaces according to the height relationship of the layered interfaces.
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 preferable that the magnitude of the temperature difference threshold is directly related to the crude oil temperature, and the greater the crude oil temperature is, the greater the temperature difference threshold should be set, because the greater the temperature difference between the oil, the water and the gas is. 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 the layering position in the oil tank, which comprises a step S1, a step S2 and a step S3, wherein the step S1 and the step S2 are the same as those in the embodiment 2, the step S3 is different from that in the embodiment 2, and the step S3 specifically comprises the following steps:
acquiring the average temperature value of the pixel area of each heat conduction rod 2, specifically, calculating the average pixel value of the pixel area of each heat conduction rod 2, and taking the average pixel value as the average temperature value of the pixel area of each heat conduction rod 2;
the variance of the average temperature values of the pixel regions of two adjacent heat-conducting rods 2 is obtained from top to bottom or from bottom to top and is recorded as a first variance, and specifically, the first variance of two adjacent heat-conducting rods 2 is obtained from top to bottom or from bottom to top in a sliding manner. Let K be a positive integer greater than 2 with K being the index of the heat-conducting rod 2, K being 1, 2, … …, (K-1). The first variance between the adjacent kth and (k + 1) th heat-conducting rods 2 is:
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 between air and water vapor (generated by evaporation of crude oil) inside the oil tank 1, the second internal layered interface is a layered interface between water vapor and oil inside the oil tank 1, the third internal layered interface is a layered interface between oil and water inside the oil tank 1, and the fourth internal layered interface is a layered interface between water and impurities such as crushed stone inside the oil tank 1. After obtaining the multiple internal layered interface positions, because the temperature difference between water and oil is the largest, in the multiple internal layered interfaces, the layered interface with the largest first difference is used as an oil-water layered interface, and then the other layered interface positions are determined according to the height relation of each layered interface.
In the present embodiment, the variance threshold may be set in advance, and in order to improve the accuracy of the detection of the boundary position of the inner part of the oil tank 1, it is further preferable that the magnitude of the variance threshold is positively correlated with the crude oil temperature, and the greater the crude oil temperature is, the greater the variance threshold is set, because the greater the temperature difference between the oil, the water and the gas is.
Example 4
The embodiment discloses a partial layer position detection device in oil tank includes: an infrared image acquisition module for acquiring an infrared image of the oil tank 1 in which the auxiliary detection device in embodiment 1 is installed; the heat conduction rod 2 pixel area acquisition module is used for acquiring the pixel area of the heat conduction rod 2 in the infrared image; and the internal part layer position obtaining module is used for obtaining the internal part layer position according to the temperature characteristic difference 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 a set of instructions is stored, and the at least one instruction, the at least one program, the code set, or the set of instructions is loaded and executed by a processor to implement the method for detecting the position of the internal stratigraphic layer in the tank 1 as provided in embodiment 2.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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 invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. The auxiliary detection device is applied to an oil tank with a heat insulation layer arranged outside, and is characterized by 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 to be connected with an oil tank body.
2. The auxiliary detecting device according to claim 1, wherein the ratio of the maximum length of the heat-conducting 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 0.032-0.042;
and/or the ratio of the center distance between two adjacent heat conducting rods to the height of the oil tank is 0.066 to 0.1.
3. The auxiliary detection device of claim 1, wherein the diameter of the heat conducting rod is 30mm to 1000 mm;
and/or the center distance between two adjacent heat conduction rods is more than or equal to two times of the diameter of the heat conduction rods.
4. The auxiliary detection device as claimed in claim 1, 2 or 3, wherein the length of the heat conducting rod is 3mm to 6mm greater than the thickness of the heat insulating layer;
and/or the heat conducting rod is a carbon structural steel rod or a brass rod or an aluminum alloy rod.
5. An auxiliary detection device as claimed in claim 1, 2 or 3, wherein a heat conducting rod thermal insulation 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. A method for detecting a layered position inside an oil tank, comprising:
acquiring an infrared image of a tank equipped with an auxiliary detection device according to any one of claims 1 to 5;
acquiring a pixel area of a heat conducting rod in an infrared image;
and obtaining the position of the internal part layer according to the temperature characteristic difference of the pixel areas of the plurality of heat conducting rods.
7. The method for detecting the position of the internal lamination in the oil tank according to the claim 6, wherein the obtaining the position of the internal lamination according to the temperature characteristic difference of the pixel areas of the plurality of heat conducting rods specifically comprises: acquiring the average temperature value of the pixel area of each heat conduction rod, setting a temperature difference threshold value, and if the difference between the average temperature values of the pixel areas of two adjacent heat conduction rods is larger than or equal to the temperature difference threshold value, determining that an internal layered interface exists between the two adjacent heat conduction rods.
8. The method for detecting the position of the internal lamination in the oil tank according to the claim 6, wherein the obtaining the position of the internal lamination according to the temperature characteristic difference of the pixel areas of the plurality of heat conducting rods specifically comprises:
acquiring the average temperature value of the pixel area of each heat conduction rod;
calculating the variance of the temperature average values of the pixel areas of two adjacent heat-conducting rods from top to bottom or from bottom to top, and recording the variance as a first variance;
and if the first variance of two adjacent heat conducting rods is larger than or equal to the variance threshold value, determining that an internal layered interface exists between the two adjacent heat conducting rods.
9. An apparatus for detecting a layered position inside an oil tank, comprising:
an infrared image acquisition module for acquiring an infrared image of an oil tank equipped with the auxiliary detection device according to any one of claims 1 to 5;
the heat conduction rod pixel area acquisition module is used for acquiring the pixel area of the heat conduction rod in the infrared image;
and the internal part layer position acquisition module is used for acquiring the internal part layer position according to the temperature characteristic difference of the pixel areas of the plurality of heat conduction rods.
10. A computer readable storage medium having stored therein at least one instruction, at least one program, a set of codes or a set of instructions, which is loaded and executed by a processor to implement the method of layered position detection inside a tank as defined in any one of claims 6 or 7 or 8.
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| CN114838785B (en) | 2023-11-17 |
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Address after: 401122 No. 21-1, building 7, No. 2, Huizhu Road, Yubei District, Chongqing Applicant after: Seven Teng Robot Co.,Ltd. Address before: 401122 No. 21-1, building 7, No. 2, Huizhu Road, Yubei District, Chongqing Applicant before: Chongqing QiTeng Technology Co.,Ltd. |
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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 |