Method for positioning defects of vertical steel oil tank bottom

Abstract

The application discloses a vertical steel oil tank bottom defect positioning measurement method, relates to the technical field of oil tank bottom defect positioning, and comprises the following steps: collecting defects on the oil tank bottom by a defect collection probe, receiving path signal data collected by a positioner in the defect collection process, analyzing and displaying an oil tank bottom defect map established by an analysis display device, collecting sound wave data of the oil tank bottom, forming an oil tank bottom sound wave library, correlating defects on the oil tank bottom defect map with the sound wave data, forming defect sound wave data and constructing a defect database, and installing the positioner on the defect collection probe. According to the path data signal collected by the positioner, the oil tank bottom defect map can be formed, the defect position, shape and size of the oil tank bottom can be clearly displayed in the form of an image, the marking loss problem caused by traditional manual defect marking is avoided, and the shape and size of the defect can be determined while the defect position is determined.

Description

Technical Field

[0001] This invention relates to the field of oil tank bottom defect location technology, and in particular to a measurement method for locating defects in the bottom of vertical steel oil tanks. Background Technology

[0002] During the use of vertical steel oil tanks in oil depots, damage and defects may occur due to various reasons. After a defect occurs, it is necessary to determine the location of the defect and form a defect detection report of the bottom of the oil tank, which serves as the basis for repairing and reshaping the oil tank.

[0003] Currently, most methods for locating defects at the bottom of vertical steel oil tanks involve manual marking. This involves manually marking defects with a chalk or similar material. While simple and easy to implement, these methods suffer from drawbacks: the marks are difficult to maintain and are easily contaminated or covered by dirt, causing the marked defects to disappear. Furthermore, this manual marking method only determines the location of the defect and does not measure its size or shape. Therefore, this invention proposes a measurement method for locating defects at the bottom of vertical steel oil tanks to address the shortcomings of existing technologies. Summary of the Invention

[0004] To address the aforementioned problems, the present invention aims to provide a measurement method for locating defects at the bottom of vertical steel oil tanks. By installing a locator on the defect acquisition probe, a defect map of the oil tank bottom is formed based on the path data signal acquired by the locator. This method can clearly display the location, shape, and size of the defects at the bottom of the oil tank in an image, avoiding the problem of missing marks that may occur with traditional manual marking of defects. At the same time, it can determine the shape and size of the defects while determining their location.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A measurement method for locating defects at the bottom of a vertical steel oil tank, comprising the following steps:

[0007] Step 1: Install a locator on the defect acquisition probe, manually hand-hold the defect acquisition probe to collect defects at the bottom of the oil tank, and then use a signal receiving device to receive the path signal data collected by the locator during the defect acquisition process.

[0008] Step 2: Analyze and display the path signal data using analysis and display equipment to create a map of defects at the bottom of the oil tank;

[0009] Step 3: Use an ultrasonic transmitting probe to emit ultrasonic waves at the bottom of the oil tank, use a sound wave receiving probe to receive the sound wave data emitted by the ultrasonic transmitting probe, perform signal processing on the received sound wave data, and then use data processing equipment to display the signal-processed sound wave data, and form an oil tank bottom sound wave image library with the bottom of the oil tank as the target.

[0010] Step 4: Map the acoustic wave library of the tank bottom to the tank bottom defect map, and collect the corresponding acoustic wave data of the defects on the tank bottom defect map in the tank bottom acoustic wave library, which is recorded as defect acoustic wave data.

[0011] Step 5: Collect defects of various shapes and types on the defect map of the bottom of the oil tank, and construct a defect database using the collected defects of various shapes and their corresponding acoustic wave data.

[0012] A further improvement is that step one also includes dividing the bottom of the oil tank into regions. When dividing, the bottom of the oil tank is divided into multiple concentric circle regions. When collecting the defects of the bottom of the oil tank, the data is collected one by one in each of the divided concentric circle regions.

[0013] A further improvement is that, in step one, when using a defect acquisition probe to collect defects from the bottom of the oil tank, the acquisition end of the defect acquisition probe follows the inner contour line of the defect, and at the same time, during the acquisition process, the acquisition personnel avoid walking out of the closed loop path on the bottom of the oil tank.

[0014] A further improvement is that, in step one, when the defect acquisition probe collects defects from the bottom of the oil tank, for slit-like defects, the acquisition end of the probe travels according to the outer contour line of the defect.

[0015] The further improvement is that: in step two, the analysis and display device analyzes and displays the path signal, and also performs data processing on the displayed path information, removes the linear path formed by manual walking in the path information, retains only the closed-loop path information formed by the defect, and forms a defect map of the bottom of the oil tank from the closed-loop path information formed by the defect.

[0016] The further improvement is that step two also includes constructing a full coordinate system for the oil tank body with the center point of the bottom of the oil tank as the origin, synchronizing the divided concentric circle areas to the full coordinate system, and marking the location of the defects on the defect map of the bottom of the oil tank on the full coordinate system.

[0017] The further improvement lies in the fact that the signal processing of the received acoustic data in step three specifically includes amplifying the acoustic data using a preamplifier and filtering the acoustic data using a filter.

[0018] A further improvement is made in step five, when collecting defects of various shapes on the bottom defect map of the oil tank, at least five groups of defects of the same shape are collected, and the collected defects of the same shape are saved in the same directory.

[0019] A further improvement is that, in step five, when constructing the defect database, the analysis of multiple defect acoustic wave data corresponding to the same type and shape under the same directory is also included to determine the characteristics of the defect acoustic wave data and store the defect characteristic content in the defect database.

[0020] The beneficial effects of the present invention are as follows: By adding a locator to the defect acquisition probe, the present invention forms a defect map of the bottom of the oil tank based on the path data signal collected by the locator. The location, shape and size of the defects at the bottom of the oil tank can be clearly displayed in an image, avoiding the problem of missing marks that may be caused by traditional manual marking of defects. At the same time, the shape and size of the defects can be determined at the same time as the location of the defects.

[0021] By collecting acoustic wave data from the bottom of oil tanks to form an acoustic wave library of oil tank bottoms and mapping it with a defect map of the oil tank bottoms, the size and shape of defects can be associated with the corresponding acoustic wave data. In subsequent defect location measurement, the location of the defect can be determined simply by locating it, and then the shape and size of the defect can be determined based on the formed defect database, which greatly improves the efficiency and location measurement effect of oil tank bottom defects. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the method flow of the present invention;

[0023] Figure 2 This is a schematic diagram showing the division of the bottom area of ​​the oil tank according to the present invention;

[0024] Figure 3 This is a schematic diagram of the defect acquisition probe acquiring defects in Embodiment 1 of the present invention;

[0025] Figure 4 This is a schematic diagram of the defect acquisition probe acquiring defects in Embodiment 2 of the present invention. Detailed Implementation

[0026] To enhance understanding of the present invention, the present invention will be further described in detail below with reference to embodiments. These embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0027] Example 1 is based on Figure 1-3 As shown in the figure, this embodiment proposes a measurement method for locating defects at the bottom of a vertical steel oil tank, including the following steps:

[0028] Step 1: Divide the bottom of the oil tank into several concentric circular areas (e.g., ...). Figure 2 As shown, Figure 2In the diagram, ①-⑥ represent dividing the bottom of the oil tank into six concentric circles. When collecting data on defects at the bottom of the oil tank, data is collected one by one from each of these concentric circles. A locator is attached to the defect collection probe, and the probe is manually held to collect data from the bottom of the oil tank. For non-crack-like defects, the collection tip of the probe follows the inner contour line of the defect (the movement of the defect collection probe is as follows...). Figure 3 As shown in the figure, during the data collection process, the data collectors should avoid walking on the bottom of the oil tank to create a closed loop path. This can prevent the trajectory of the manual walking from being confused with the trajectory of the defect on the bottom of the tank, thereby improving the accuracy of the tank bottom defect location. Then, the signal receiving device is used to receive the path signal data collected by the locator during the defect collection process.

[0029] Step 2: Construct a full coordinate system for the oil tank body with the center point of the tank bottom as the origin, and synchronize the divided concentric circle areas into the full coordinate system. Use analysis and display equipment to analyze and display the path signal data, process the displayed path information, remove the linear paths formed by manual walking, and only retain the closed-loop path information formed by defects. Then, form a defect map of the oil tank bottom with the closed-loop path information formed by defects, and mark the defect positions on the oil tank bottom defect map on the full coordinate system. This operation not only avoids the problem of mark loss caused by using a stone pencil to mark defects when manually locating defects in the existing technology, but also allows for intuitive location of the defect position and which divided area of ​​the oil tank bottom the defect is in based on the coordinates of the full coordinate system.

[0030] Step 3: An ultrasonic transmitting probe emits ultrasonic waves at the bottom of the oil tank. A sound wave receiving probe receives the emitted sound wave data and processes it. This includes amplifying the sound wave data using a preamplifier, filtering the sound wave data using a filter, and then displaying the processed sound wave data using data processing equipment. A database of sound wave patterns of the oil tank bottom is created, targeting the tank bottom. The sound wave spectrum changes depending on the location of defects on the tank bottom, and different shapes and sizes of defects correspond to different spectra. By analyzing the correlation between the spectrum and the shape and size of the defects, the size and shape data of the defects can be obtained through analyzing the ultrasonic data, facilitating subsequent defect location and measurement.

[0031] Step 4: Map the acoustic wave library of the tank bottom to the tank bottom defect map, and collect the corresponding acoustic wave data of the defects on the tank bottom defect map in the tank bottom acoustic wave library, which is recorded as defect acoustic wave data.

[0032] Step 5: Collect defects of various shapes and types on the defect map of the bottom of the oil tank. Collect at least 5 sets of defects of the same shape and save the collected defects of the same shape in the same directory. Build a defect database using the collected defects of various shapes and their corresponding defect acoustic data. Then analyze the acoustic data of multiple defects of the same shape in the same directory to determine the characteristics of the defect acoustic data and store the defect characteristics in the defect database.

[0033] Example 2

[0034] according to Figure 1 , 2 As shown in Figure 4, this embodiment proposes a measurement method for locating defects at the bottom of a vertical steel oil tank, including the following steps:

[0035] Step 1: Divide the bottom of the oil tank into multiple concentric circular areas. When collecting defect data from the bottom of the oil tank, collect data from each of these concentric circular areas one by one. Attach a locator to the defect collection probe and manually collect data from the bottom of the oil tank using the handheld probe. For defects such as narrow cracks (e.g.,...),... Figure 4 As shown), during the acquisition process, the acquisition end of the defect acquisition probe moves according to the outer contour of the defect. This operation can avoid the problem that the defect acquisition probe cannot enter the slit-like defect, so that the defect acquisition probe in the method of the present invention can acquire defects of any shape, which is highly flexible. At the same time, during the acquisition process, the acquisition personnel should avoid walking out of the closed loop path on the bottom of the oil tank, and then use the signal receiving device to receive the path signal data acquired by the locator during the defect acquisition process.

[0036] Step 2: Construct a full coordinate system for the oil tank body with the center point of the tank bottom as the origin. Synchronize the divided concentric circle areas into the full coordinate system. Use analysis and display equipment to analyze and display the path signal data. Process the displayed path information to remove linear paths formed by manual walking and retain only the closed-loop path information formed by defects. Form a defect map of the oil tank bottom from the closed-loop path information formed by defects and mark the defect locations on the oil tank bottom defect map on the full coordinate system.

[0037] Step 3: Use an ultrasonic transmitting probe to emit ultrasonic waves at the bottom of the oil tank, use a sound wave receiving probe to receive the sound wave data emitted by the ultrasonic transmitting probe, and perform signal processing on the received sound wave data. Specifically, this includes amplifying the sound wave data using a preamplifier, filtering the sound wave data using a filter, and then displaying the signal-processed sound wave data using data processing equipment. Finally, a sound wave image library of the oil tank bottom is formed with the oil tank bottom as the target.

[0038] Step 4: Map the acoustic wave library of the tank bottom to the tank bottom defect map, and collect the corresponding acoustic wave data of the defects on the tank bottom defect map on the tank bottom acoustic wave library, which is recorded as defect acoustic wave data.

[0039] Step 5: Collect defects of various shapes and types on the defect map of the bottom of the oil tank. Collect at least 5 sets of defects of the same shape and save the collected defects of the same shape in the same directory. Build a defect database using the collected defects of various shapes and their corresponding defect acoustic data. Then analyze the acoustic data of multiple defects of the same shape in the same directory to determine the characteristics of the defect acoustic data and store the defect characteristics in the defect database.

[0040] This invention adds a locator to the defect acquisition probe and forms a defect map of the bottom of the oil tank based on the path data signal collected by the locator. It can clearly display the location, shape and size of the defects on the bottom of the oil tank in an image, avoiding the problem of missing marks that may be caused by traditional manual marking of defects. At the same time, it can determine the shape and size of the defects while determining their location.

[0041] By collecting acoustic wave data from the bottom of oil tanks to form an acoustic wave library of oil tank bottoms and mapping it with a defect map of the oil tank bottoms, the size and shape of defects can be associated with the corresponding acoustic wave data. In subsequent defect location measurement, the location of defects can be measured and the shape and size of defects can be determined based on the formed defect database, which greatly improves the efficiency and location measurement effect of oil tank bottom defects.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A measurement method for locating defects at the bottom of a vertical steel oil tank, characterized in that, Includes the following steps: Step 1: Install a locator on the defect acquisition probe, manually hand-hold the defect acquisition probe to collect defects at the bottom of the oil tank, and then use a signal receiving device to receive the path signal data collected by the locator during the defect acquisition process. When using a defect acquisition probe to collect defects on the bottom of an oil tank, the acquisition end of the probe follows the inner contour line of the defect. At the same time, during the acquisition process, the acquisition personnel should avoid walking out of the closed loop on the bottom of the oil tank. Step 2: Analyze and display the path signal data using analysis and display equipment. This also includes data processing of the displayed path information, removing linear paths formed by manual walking, retaining only the closed-loop path information formed by defects, and forming a defect map of the bottom of the oil tank from the closed-loop path information formed by defects. Step 3: Use an ultrasonic transmitting probe to emit ultrasonic waves at the bottom of the oil tank, use a sound wave receiving probe to receive the sound wave data emitted by the ultrasonic transmitting probe, perform signal processing on the received sound wave data, and then use data processing equipment to display the signal-processed sound wave data, and form an oil tank bottom sound wave image library with the bottom of the oil tank as the target. Step 4: Map the acoustic wave library of the tank bottom to the tank bottom defect map, and collect the corresponding acoustic wave data of the defects on the tank bottom defect map in the tank bottom acoustic wave library, which is recorded as defect acoustic wave data. Step 5: Collect defects of various shapes and types from the defect map at the bottom of the oil tank. Collect at least 5 sets of defects of the same shape and type, and save the collected defects of the same shape and type in the same directory. Construct a defect database using the collected defects of various shapes and types and their corresponding acoustic wave data, and associate the defect size, shape and corresponding acoustic wave data. Analyze the acoustic wave data of multiple defects of the same shape and type in the same directory to determine the characteristics of the defect acoustic wave data, and store the defect characteristics in the defect database. In the subsequent defect location measurement, the defect location is determined by positioning and measurement, and then the shape and size of the defect are determined based on the formed defect database.

2. The measurement method for locating defects at the bottom of a vertical steel oil tank according to claim 1, characterized in that: Step one also includes dividing the bottom of the oil tank into regions. During the division, the bottom of the oil tank is divided into multiple concentric circle regions. When collecting defects from the bottom of the oil tank, the data is collected one by one from each of the divided concentric circle regions.

3. The measurement method for locating defects at the bottom of a vertical steel oil tank according to claim 1, characterized in that: In step one, when the defect acquisition probe collects defects at the bottom of the oil tank, for slit-like defects, the acquisition end of the probe travels according to the outer contour line of the defect.

4. The measurement method for locating defects at the bottom of a vertical steel oil tank according to claim 2, characterized in that: Step two also includes constructing a full coordinate system for the oil tank body with the center point of the tank bottom as the origin, synchronizing the divided concentric circle areas to the full coordinate system, and marking the location of defects on the tank bottom defect map on the full coordinate system.

5. The measurement method for locating defects at the bottom of a vertical steel oil tank according to claim 1, characterized in that: The signal processing of the received acoustic data in step three specifically includes amplifying the acoustic data using a preamplifier and filtering the acoustic data using a filter.

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