Method and system for detecting the diameter of a single-tube tower anchor bolt distribution circle

Abstract

This invention relates to a method and system for detecting the distribution circle diameter of anchor bolts on a single-tube tower, belonging to the field of engineering measurement and inspection. The method includes: acquiring image information of the single-tube tower; identifying specific relative bolts based on the single-tube tower image information and preset bolt features, and determining the center point using a preset method for determining the relative bolt center point; determining the standard position for prism installation based on the relative bolt center point, and acquiring the prism installation position; when the prism installation position coincides with the standard prism installation position, acquiring the coordinates of the bolt center point; calculating the horizontal distance between bolts based on the bolt center point coordinates; and obtaining the distribution circle diameter based on the bolt horizontal distance. This application improves measurement accuracy.

Description

Technical Field

[0001] This invention relates to the field of engineering measurement and testing, and in particular to a method and system for detecting the diameter of the distribution circle of anchor bolts on a single-tube tower. Background Technology

[0002] A single-tube tower is a tall structure with a single cylindrical or conical steel tower as its core structure. It is mainly used to support communication, power, broadcasting and television equipment, and to realize signal transmission or line erection.

[0003] Currently, when a monotube tower needs to be relocated, the distribution circle diameter of the anchor bolts at the old installation location must be measured before the monotube tower is dismantled. Then, the anchor bolts are installed sequentially at the new installation location. Finally, the monotube tower is dismantled and relocated to the new location.

[0004] The presence of the single-tube tower in the middle will significantly hinder the measurement of the diameter of the anchor bolt distribution circle at the old installation location, resulting in reduced measurement accuracy, which needs to be improved. Summary of the Invention

[0005] To improve measurement accuracy, this invention provides a method and system for detecting the diameter of the distribution circle of anchor bolts in a single-tube tower.

[0006] In a first aspect, the present invention provides a method for detecting the diameter of the distribution circle of anchor bolts in a single-tube tower, employing the following technical solution:

[0007] A method for detecting the diameter of the distribution circle of anchor bolts in a single-tube tower includes:

[0008] Acquire image information of a single-tube tower;

[0009] Based on the image information of the single-tube tower and the preset bolt features, specific relative bolts are identified, and the center point is determined by the preset relative bolt center point determination method, thereby obtaining the relative bolt center point;

[0010] The standard position for prism mounting is determined based on the relative bolt center points, and the prism mounting position is collected.

[0011] When the prism is installed at the same standard position as the prism, collect the coordinates of the bolt center point.

[0012] Calculate the horizontal distance of the bolts based on the coordinates of the bolt center point;

[0013] The diameter of the distribution circle is obtained based on the horizontal distance between the bolts.

[0014] By adopting the above technical solution, images of the single-tube tower are first acquired, and the relative bolts are identified and their center points determined based on bolt features. The standard position for prism installation is then determined based on the center points. After the prism is in place, the coordinates of the bolt center points are acquired, and the horizontal distance is calculated to obtain the distribution circle diameter. This method accurately locates the bolt center points through image recognition, and the coordinate data obtained through prism measurement effectively avoids the obstruction of the single-tube tower itself, reduces errors caused by occlusion, and improves the measurement accuracy of the anchor bolt distribution circle diameter.

[0015] Optionally, the method for determining the relative bolt center point includes:

[0016] Acquire images of the bolt surface relative to the specific bolt;

[0017] Bolt features are identified from bolt surface images to obtain the bolt's outer contour;

[0018] Generate the contour diagonal based on the bolt's outer contour;

[0019] The relative bolt center point is obtained by finding the intersection of the diagonals of the profile.

[0020] By adopting the above technical solution, the outer contour of the bolt is identified from the bolt surface image, and a diagonal line of the contour is generated. The intersection of the diagonals is used as the relative center point of the bolt. This approach, by accurately extracting the outer contour of the bolt and using geometric features to determine the center point, avoids interference from single-tube tower obstruction on bolt positioning and improves the accuracy of center point positioning.

[0021] Optionally, a method for detecting the diameter of the distribution circle may also be included:

[0022] Collect the single-tube tower number;

[0023] The dimensions of a single-tube tower are obtained based on its number;

[0024] The model of the testing ring is matched according to the size of the single-tube tower;

[0025] The detection rings corresponding to the detection ring model are fixed around the single-tube tower, and detection image information is collected;

[0026] Bolt detection values ​​are generated based on the detected image information and preset bolt features;

[0027] The diameter of the distribution circle verification is determined by the bolt inspection value;

[0028] If the verification diameter of the distribution circle matches the diameter of the distribution circle, the measurement of the distribution circle diameter is complete.

[0029] By adopting the above technical solution, the dimensions of a single-tube tower are obtained by collecting its serial number. A suitable detection ring is then matched and fixed around the single-tube tower. Detection images are collected to generate bolt detection values ​​to determine the calibration diameter of the distribution circle. When the calibration diameter matches the previously obtained distribution circle diameter, the measurement is completed. This dual-method verification, utilizing the consistency of results from two independent methods, further eliminates measurement deviations that may be caused by single-tube tower obstruction, significantly improving the reliability and accuracy of the distribution circle diameter measurement results.

[0030] Optionally, a method for generating bolt inspection values ​​may also be included:

[0031] Bolt features are scanned and identified from the detected image information to obtain the bolt position coordinate set;

[0032] The bolt position coordinate set is grouped to obtain relative bolt groups;

[0033] The center point of the detected bolt is determined by combining the detected image information and the relative bolt group;

[0034] The spacing measurement value is obtained based on the relative bolt center point;

[0035] The bolt inspection value is obtained based on the spacing measurement value.

[0036] By adopting the above technical solution, bolt features are first scanned and identified from the detection image to obtain the bolt position coordinate set and grouped into relative bolt groups. The center point of the detected bolt is determined by combining the image and the relative bolt groups. After measuring the distance between the center points, the bolt detection value is obtained. This provides a reliable basis for calculating the diameter of the distribution circle verification, complementing the previous prism measurement and further ensuring the accuracy of the measurement results.

[0037] Optional, also includes:

[0038] The detection ring surround size is obtained based on the detection ring model;

[0039] Compare the dimensions of the detection ring with the dimensions of a single-tube tower.

[0040] When the size of the detection ring is smaller than the size of a single-tube tower, pre-detection image information is collected;

[0041] Bolt feature recognition is performed on the pre-inspection image information to determine the relative number of bolt groups;

[0042] When the relative number of bolt groups is greater than the preset required number of bolt groups, bolt detection values ​​are generated based on the detected image information and preset bolt features;

[0043] When the relative number of bolt groups is not greater than the preset required number of bolt groups, the preset surround adjustment method is activated to perform surround adjustment, and bolt detection values ​​are generated after adjustment.

[0044] By adopting the above technical solution, the encirclement size of the detection ring is first obtained according to its model and compared with the size of a single-tube tower. If the detection ring size is too small, a pre-inspection image is collected to identify the relative number of bolt groups. When the number meets the requirements, the bolt detection value is directly generated; if not, encirclement adjustment is initiated before generating the detection value. In this way, by judging the adaptability of the detection ring size and verifying the number of bolt groups, sufficient bolt data is ensured, avoiding the loss of measurement data due to insufficient detection ring adaptation, and further ensuring the accuracy and reliability of the distribution circle diameter measurement.

[0045] Optionally, the surround adjustment method includes:

[0046] When the relative number of bolt groups is not greater than the preset required number of bolt groups, the required number of times to wrap around is calculated based on the single-tube tower size and the detection ring wrapping size.

[0047] The orbiting path parameters are generated based on the required number of orbits, the size of the detection ring, and the preset initial orbiting position.

[0048] Based on the surrounding path parameters, the detection ring is controlled to move along the tower column axis and segmented image information is acquired;

[0049] Generate stitched image information based on segmented image information;

[0050] Bolt detection values ​​are generated based on stitched image information and preset bolt features.

[0051] By adopting the above technical solution, when the number of bolt groups is insufficient, the required number of loops is first calculated based on the dimensions of the single-tube tower and the detection ring, and loop path parameters are generated in conjunction with the initial position. The detection ring is then controlled to move along the tower column axis and segmented images are acquired, which are then stitched together based on the bolt detection values. This approach, by moving the detection ring in segments and stitching the images, compensates for the problem of insufficient coverage in a single pass caused by the small size of the detection ring, ensuring that sufficient bolt feature information is obtained, thereby guaranteeing the integrity and accuracy of the bolt detection values ​​and further improving measurement reliability.

[0052] Optional, also includes:

[0053] The bolt installation location is determined based on the single-tube tower number;

[0054] Determine whether there are any pre-defined foreign object features at the bolt installation location from the detected image information;

[0055] When foreign object features are present, bolt features are identified from the detected image information to obtain the number of remaining relative bolt groups;

[0056] When the number of remaining relative bolt groups is less than the preset required number of bolt groups, foreign matter is handled using the preset foreign matter handling method.

[0057] When the number of remaining relative bolt groups is not less than the preset required number of bolt groups, bolt detection values ​​are generated based on the detected image information and preset bolt features.

[0058] By adopting the above technical solution, the bolt installation position is first determined based on the single-tube tower number, and the presence of foreign objects at that position is judged from the detection image. If foreign objects are found, the relative number of remaining bolt groups is identified. When the number is insufficient, foreign objects are removed using foreign object removal methods; if the number meets the requirements, bolt detection values ​​are directly generated, avoiding insufficient effective bolt data due to foreign object obstruction, ensuring that sufficient bolt feature information can be obtained, further guaranteeing the accuracy of bolt detection values ​​and improving the reliability of distribution circle diameter measurement.

[0059] Optionally, the foreign object removal method includes:

[0060] The bolt occlusion state is determined based on the detected image information, bolt features, and foreign object features.

[0061] The required additional bolt sets are determined based on the remaining relative number of bolt sets and the required number of bolt sets.

[0062] Determine the priority of critical bolts based on bolt obstruction status and bolt installation location;

[0063] Increase the number of bolt groups and prioritize key bolts according to requirements to generate air blowing parameters;

[0064] Based on the blowing parameters, the blowing device preset on the detection ring is controlled to blow air to deal with the obstruction of foreign objects.

[0065] By adopting the above technical solution, the state of bolt obstruction by foreign objects is first determined based on the detection image. The number of remaining bolt groups and the required number are then combined to determine the number of additional bolt groups needed. Next, the priority of critical bolts is determined based on the obstruction state and installation location. Air blowing parameters are generated by combining the required number and priority, controlling the air blowing device on the detection ring to specifically blow air to remove foreign object obstructions. This approach, by accurately judging the obstruction state and blowing air in a targeted manner according to priority, efficiently removes foreign objects from critical bolt locations, ensuring sufficient and effective bolt group information is obtained, guaranteeing the accuracy of bolt detection value generation, and further improving measurement efficiency and reliability.

[0066] Optional, also includes:

[0067] Collect regional meteorological data;

[0068] Environmental risk assessment values ​​are obtained based on regional meteorological data;

[0069] Determine whether the environmental risk assessment value exceeds the preset safety threshold;

[0070] When the environmental risk assessment value does not exceed the preset safety threshold, regional meteorological data will continue to be collected, and the control detection ring will continue to perform the circling operation.

[0071] When the environmental risk assessment value exceeds the preset safety threshold, the ring-circling operation is suspended.

[0072] By adopting the above technical solution, regional meteorological data is first collected and environmental risks are assessed. If the risk does not exceed the safety threshold, meteorological data collection continues and the detection ring continues to rotate. If the risk exceeds the threshold, the rotation of the detection ring is suspended. This approach, by monitoring environmental risks in real time and suspending operations promptly, avoids the impact of environmental factors such as severe weather on the detection process and equipment, ensuring the safety and stability of the measurement process and indirectly improving the reliability of the detection data.

[0073] Secondly, this application provides a detection system for the distribution circle diameter of anchor bolts in a single-tube tower, employing the following technical solution:

[0074] A detection system for the distribution circle diameter of anchor bolts on a single-tube tower includes:

[0075] The acquisition module is used to acquire image information of the single-tube tower, the prism installation position, and the coordinates of the bolt center point;

[0076] The memory is used to store the program for implementing a method for detecting the distribution circle diameter of anchor bolts in a single-tube tower;

[0077] The processor is used to load and execute programs stored in memory.

[0078] In summary, this application includes at least one of the following beneficial technical effects:

[0079] 1. By first acquiring images of the single-tube tower, and then identifying relative bolts and determining their center points based on bolt features, the standard position for prism installation is determined based on the center points. After the prism is in place, the coordinates of the bolt center points are acquired, and the horizontal distance is calculated to obtain the distribution circle diameter. This method accurately locates the bolt center points through image recognition, and combines this with prism measurement to obtain coordinate data. This effectively avoids the obstruction of the single-tube tower itself to the measurement, reduces errors caused by occlusion, and improves the measurement accuracy of the anchor bolt distribution circle diameter.

[0080] 2. The dimensions of the single-tube tower are obtained by collecting its serial number. A suitable detection ring is matched and fixed around the single-tube tower. Detection images are collected to generate bolt detection values ​​to determine the calibration diameter of the distribution circle. When the calibration diameter matches the previously obtained distribution circle diameter, the measurement is completed. This dual-method verification, utilizing the consistency of results from two independent methods, further eliminates measurement deviations that may be caused by single-tube tower obstruction, significantly improving the reliability and accuracy of the distribution circle diameter measurement results.

[0081] 3. First, determine the state of the bolts obstructed by foreign objects based on the inspection image. Then, combine the remaining relative number of bolt groups with the required number to determine the number of additional bolt groups needed. Next, determine the priority of critical bolts based on the obstruction state and installation location. Combine the required number and priority to generate air blowing parameters, controlling the air blowing device on the inspection ring to specifically blow air to remove foreign object obstructions. This method, by accurately judging the obstruction state and blowing air in a targeted manner according to priority, efficiently removes foreign objects at critical bolt locations, ensuring sufficient and effective bolt group information is obtained, guaranteeing the accuracy of bolt inspection value generation, and further improving measurement efficiency and reliability. Attached Figure Description

[0082] Figure 1 This is a flowchart of a method for detecting the diameter of the distribution circle of anchor bolts in a single-tube tower;

[0083] Figure 2 This is a simplified front view diagram of the detection ring surrounding the single-tube tower;

[0084] Figure 3 This is a simplified top view of the detection ring surrounding the single-tube tower.

[0085] The parts referred to by the numbers in the above attached diagrams are as follows: 1. Single-tube tower; 2. Inspection ring; 3. Anchor bolt. Detailed Implementation

[0086] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0087] Reference Figure 1 , Figure 2 as well as Figure 3 This application discloses a method for detecting the distribution circle diameter of anchor bolts on a single-tube tower, comprising the following steps:

[0088] S10: Acquire image information of a single-tube tower.

[0089] Single-tube tower image information refers to the frontal image of a single-tube tower acquired using a total station.

[0090] The installation of the total station shall be selected by those skilled in the art based on the actual site conditions, and will not be elaborated here.

[0091] S11: Based on the image information of the single-tube tower and the preset bolt features, identify the specific relative bolts, and determine the center point using the preset relative bolt center point determination method, thereby obtaining the relative bolt center point.

[0092] Bolt features refer to the visual characteristics of anchor bolt 3, including bolt outline and top shape. Bolt features are predetermined by those skilled in the art and will not be elaborated here.

[0093] Specifically, relative bolts refer to two anchor bolts that are in relative positions within the distribution circle of anchor bolts on a single-tube tower and can form an effective measurement group.

[0094] Specifically, relative bolts are identified by analyzing the image information of a single-tube tower to determine the location of all visible bolts. Based on the angular distribution of the bolts on the distribution circle, bolts with an angle difference closest to 180 degrees are selected to form relative bolt groups.

[0095] The method for determining the center point of relative bolts refers to the method used to determine the position of the center point of each of the two anchor bolts 3 in a specific pair of relative bolts.

[0096] The relative bolt center point refers to the position of the center point of each of the two anchor bolts 3 in a specific relative bolt configuration. The relative bolt center point can be obtained through the method for determining the relative bolt center point. The specific method for determining the relative bolt center point will be explained in detail in subsequent sections S20 to S23, and will not be repeated here.

[0097] Once the specific relative bolts are obtained, the center point needs to be determined using the method for determining the center point of the relative bolts, thereby obtaining the center point of the relative bolts.

[0098] S12: Determine the standard position for prism mounting based on the relative bolt center point, and collect the prism mounting position.

[0099] The standard position for prism mounting refers to the ideal mounting position for the prism, which should accurately correspond to the center point of the bolt.

[0100] The standard position for prism erection is determined by converting the bolt center point position in the image coordinate system into three-dimensional coordinates in the actual measurement coordinate system using coordinate transformation algorithms based on the coordinate data of the relative bolt center point. The specific transformation algorithm needs to be combined with camera parameters and spatial positioning parameters, which are set by those skilled in the art based on the actual site conditions and will not be elaborated upon here.

[0101] The prism installation position refers to the actual coordinates of the prism during installation, which is obtained in real time using a total station.

[0102] Before setting up the prism, first install the prism on the centering rod and tighten the fixing knob to prevent the prism from shaking. Then, place the pointed end of the centering rod at the center point of the previously determined relative bolt and adjust the standing angle of the centering rod so that the leveling bubble is in the center. This completes the setting up of the prism.

[0103] S13: When the prism is installed at the same position as the standard prism installation position, collect the coordinates of the bolt center point.

[0104] Bolt center point coordinates refer to the three-dimensional coordinates of the bolt center point in the actual coordinate system obtained by measuring with a total station.

[0105] When the prism is installed in the same position as the standard prism installation position, it means that the subsequent coordinate acquisition operation can be carried out. Therefore, it is necessary to acquire the coordinates of the bolt center point for subsequent steps.

[0106] S14: Calculate the horizontal distance of the bolt based on the coordinates of the bolt center point.

[0107] The horizontal distance between bolts refers to the straight-line distance between the center points of two opposite bolts on a horizontal plane, obtained by calculating the difference in the horizontal coordinates of the two bolt center points. The specific calculation method is common knowledge to those skilled in the art and will not be elaborated here.

[0108] S15: Obtain the distribution circle diameter based on the horizontal distance of the bolts.

[0109] The distribution circle diameter refers to the diameter of the distribution circle where the center point of anchor bolt 3 is located.

[0110] Since the horizontal distance between bolts is the distance between two bolts opposite each other on the same distribution circle, the bolt detection value is the diameter of the distribution circle.

[0111] Methods for determining the relative bolt center point include:

[0112] S20: Acquire images of the bolt surface relative to the specific bolt.

[0113] The bolt surface image refers to the image of a single anchor bolt 3.

[0114] The bolt surface image was acquired by a camera on the detection ring 2.

[0115] S21: Identify bolt features from bolt surface images to obtain the bolt outer contour.

[0116] The outer contour of the bolt refers to the external geometric contour characteristics of the anchor bolt 3.

[0117] The contour boundary of anchor bolt 3 in the bolt surface image can be extracted by using an edge detection algorithm. Edge detection algorithms are common knowledge in this field and will not be elaborated here.

[0118] S22: Generate the profile diagonal based on the bolt's outer contour.

[0119] The profile diagonal refers to the virtual line segment connecting the opposite vertices of the bolt profile.

[0120] The contour diagonals are generated by extracting the boundary point set of the bolt's outer contour, calculating its minimum bounding rectangle, and connecting the two opposite vertices of the rectangle. This method is based on the principle of geometric feature extraction in image processing, which is a well-known technique in the field and will not be elaborated upon here.

[0121] S23: Obtain the relative bolt center point through the intersection of the contour diagonals.

[0122] The relative bolt center point is obtained by calculating the coordinates of the intersection of the two diagonals of the bolt profile. This intersection point is the geometric center of the bolt's outer profile and serves as the relative bolt center point. The specific calculation method is based on the principle of finding the intersection of two straight lines in plane geometry, which is a well-known technique in this field and will not be elaborated here.

[0123] It also includes methods for detecting the diameter of the distribution circle:

[0124] S30: Collect the single-tube tower number.

[0125] The single-tube tower number refers to the identification code of single-tube tower 1 that needs to be relocated.

[0126] The single-tube tower number was pre-entered by those skilled in the art and will not be elaborated here.

[0127] S31: Obtain the single-tube tower size based on the single-tube tower number.

[0128] The dimensions of a single-tube tower refer to the structural parameters of a single-tube tower, including the tower column diameter and the tower height.

[0129] The dimensions of the single-tube tower are obtained by querying a pre-set single-tube tower database. This database records the single-tube tower dimension parameters corresponding to different single-tube tower numbers. The single-tube tower database was pre-established by those skilled in the art based on the structural parameters in the design drawings of single-tube tower 1, and will not be elaborated here.

[0130] S32: Match the test ring model according to the single-tube tower size.

[0131] The test ring model refers to the specification marking of the test device applicable to single-tube towers of different sizes.

[0132] The test ring model is obtained by consulting a pre-set test ring reference table. This reference table records the test ring models corresponding to different single-tube tower sizes. The test ring reference table is manually configured and established by those skilled in the art based on the matching relationship between the tower diameter range and the test ring specifications, and will not be elaborated here.

[0133] S33: Fix the detection ring 2, which corresponds to the detection ring model, around the single tube tower 1, and collect detection image information.

[0134] The detected image information refers to the image data of the tower base area collected by the camera installed on the detection ring 2. The detected image information includes the anchor bolts 3.

[0135] Once the detection ring model is obtained, the detection ring 2 corresponding to the detection ring model needs to be fixed around the single tube tower 1, and detection image information needs to be collected for subsequent steps.

[0136] S34: Generate bolt detection values ​​based on the detected image information and preset bolt features.

[0137] The bolt inspection value refers to the final effective measurement value of the spacing between the relative anchor bolts 3. The specific method for determining the bolt inspection value will be explained in detail in S40 to S44, and will not be repeated here.

[0138] S35: Determine the diameter of the distribution circle verification by bolt inspection value.

[0139] The distribution circle verification diameter also refers to the diameter of the distribution circle where the center point of the anchor bolt 3 is located, and is used to verify the distribution circle diameter of S15 above.

[0140] Since the bolt inspection value is the distance between two screws opposite each other on the same distribution circle, the bolt inspection value is the diameter of the distribution circle verification.

[0141] S36: If the verification diameter of the distribution circle is consistent with the diameter of the distribution circle, the measurement of the diameter of the distribution circle is completed.

[0142] If the calibration diameter of the distribution circle matches the diameter of the distribution circle, it indicates that the diameter of the distribution circle in S15 above is accurate, and the measurement of the diameter of the distribution circle can be completed.

[0143] It also includes methods for generating bolt inspection values:

[0144] S40: Scan and identify bolt features from the detected image information to obtain the bolt position coordinate set.

[0145] The bolt position coordinate set refers to the set of position coordinates of each anchor bolt 3 in the image coordinate system.

[0146] The bolt position coordinate set is obtained by using a feature matching algorithm to identify regions that match bolt features in the detection image, then using edge detection technology to accurately locate the contour boundaries of each anchor bolt 3, calculating the coordinates of the geometric center point of each bolt contour, standardizing the coordinates of each center point in the image coordinate system, and outputting a coordinate set containing the position coordinates of all anchor bolts, i.e., the bolt position coordinate set.

[0147] The specific implementation methods of the feature matching algorithm and edge detection technology are well-known in the field and will not be elaborated here. The coordinate standardization process uses a transformation algorithm from the image coordinate system to the actual coordinate system, and the transformation parameters are determined by those skilled in the art based on the camera calibration results.

[0148] S41: Group the bolt position coordinate set to obtain relative bolt groups.

[0149] A relative bolt group refers to a measurement group consisting of two anchor bolts positioned opposite each other on a distribution circle.

[0150] The relative bolt groups are obtained by performing polar coordinate transformation and angle analysis on the bolt position coordinate set. First, the coordinates of anchor bolt 3 are transformed to a polar coordinate system with the center of the distribution circle as the origin. After calculating the angle values ​​of each anchor bolt 3, anchor bolt 3 are paired according to the principle that the angle difference is close to 180 degrees. Finally, the relative bolt groups are confirmed by verifying the geometric symmetry of the paired anchor bolt 3. The polar coordinate transformation algorithm and angle tolerance are determined by those skilled in the art based on the characteristics of the distribution circle, and will not be elaborated here.

[0151] S42: Combine the detection image information and the relative bolt group to determine the center point of the detection bolt.

[0152] The detection of bolt center points refers to the center points of two opposing anchor bolts 3 in the relative bolt group in the detection image information.

[0153] The specific method for determining the center point of the bolt is the same as that described in S20 to S23 above; only the bolt surface image needs to be replaced with the detection image information.

[0154] S43: Obtain the spacing measurement based on the relative bolt center point.

[0155] The spacing measurement value refers to the straight-line distance between the center points of two anchor bolts 3 in the relative bolt group.

[0156] The spacing measurement value is obtained by calculating the Euclidean distance between the center points of the two anchor bolts 3.

[0157] S44: Obtain bolt inspection values ​​based on spacing measurements.

[0158] The final bolt inspection value can be obtained by averaging multiple spacing measurements.

[0159] Also includes:

[0160] S50: The detection ring surround size is obtained based on the detection ring model.

[0161] The detection ring encirclement size refers to the maximum encirclement range that detection ring 2 can effectively detect.

[0162] The encircling dimensions of the detection ring are obtained by querying a pre-set detection ring parameter database. This database records the encircling dimension parameters corresponding to different detection ring models. The detection ring parameter database was pre-established by those skilled in the art based on the maximum effective detection range in the design specifications of detection ring 2, and will not be elaborated here.

[0163] S51: Compare the dimensions of the detection ring with the dimensions of a single-tube tower.

[0164] By determining the relationship between the size of the detection ring and the size of the single-tube tower, we can determine whether it is possible to directly collect detection image information.

[0165] S52: When the size of the detection ring is smaller than the size of a single-tube tower, collect pre-detection image information.

[0166] Pre-inspection image information refers to preliminary inspection images collected before formal inspection.

[0167] The pre-detection image information is also obtained by capturing images from the camera on detection ring 2.

[0168] When the size of the detection ring is smaller than that of a single-tube tower, it means that the image collected by the detection ring 2 cannot completely cover all the anchor bolts 3. Pre-inspection image information needs to be collected first for subsequent steps.

[0169] When the size of the detection ring is not smaller than the size of a single-tube tower, the subsequent steps of acquiring detection image information can be carried out directly.

[0170] S53: Perform bolt feature recognition on the pre-inspection image information to determine the relative number of bolt groups.

[0171] The relative bolt group number refers to the number of currently identifiable valid relative bolt groups.

[0172] The relative bolt group count is determined by first identifying the positions of all visible anchor bolts 3 in the pre-detection image based on bolt features, then pairing and grouping the anchor bolts 3 according to their angular distribution on the distribution circle, and finally counting the number of valid bolt groups that meet the relative position requirements (i.e., an angle difference close to 180 degrees). This method is based on image recognition and geometric analysis principles, which are well-known technologies in the field and will not be elaborated upon here.

[0173] S54: When the relative number of bolt groups is greater than the preset required number of bolt groups, generate bolt detection values ​​based on the detected image information and preset bolt features.

[0174] The required number of bolt sets refers to the minimum relative number of bolt sets required to ensure measurement accuracy. The required number of bolt sets is predetermined by those skilled in the art and will not be elaborated upon here.

[0175] When the relative number of bolt groups is greater than the required number of bolt groups, it means that the number of bolt groups can meet the measurement accuracy requirements. Bolt detection values ​​can be generated directly, and subsequent steps for determining the distribution circle diameter can be performed.

[0176] S55: When the relative number of bolt groups is not greater than the preset required number of bolt groups, the preset surround adjustment method is started to perform surround adjustment, and the bolt detection value is generated after adjustment.

[0177] The surrounding adjustment method refers to the method used to adjust the surrounding condition of the detection ring 2, thereby facilitating the detection of bolt values.

[0178] The specific methods for adjusting the surround will be explained in detail in S60 to S64, and will not be repeated here.

[0179] When the relative number of bolt groups is not greater than the required number of bolt groups, it indicates that the number of bolt groups does not meet the measurement accuracy requirements. It is necessary to first perform a circumferential adjustment using the circumferential adjustment method for subsequent steps.

[0180] Surround adjustment methods include:

[0181] S60: When the relative number of bolt groups is not greater than the preset required number of bolt groups, the required number of times to wrap around the detection ring is calculated based on the single-tube tower size and the detection ring wrapping size.

[0182] The required number of wraparound adjustments refers to the minimum number of wraparound adjustments required to complete a full test.

[0183] The required number of loops is obtained by calculating the ratio between the single-tube tower size and the detection loop size. When the calculation result has a decimal, it is rounded up to obtain the final result.

[0184] When the relative number of bolt groups is not greater than the required number of bolt groups, the required number of turns must be calculated first for subsequent steps.

[0185] S61: Generate the orbit path parameters based on the required number of orbits, the detection ring orbit size, and the preset initial orbit position.

[0186] The initial encirclement position refers to the starting position where detection ring 2 begins detection. The initial encirclement position is set in advance by those skilled in the art and will not be elaborated here.

[0187] The orbital path parameters refer to the set of motion control parameters for controlling the two-segment orbital detection of the detection ring, including the axial movement distance, orbital speed, and detection point coordinate sequence for each orbit.

[0188] The tower column is first divided into equally spaced detection sections along its axis based on the required number of circumference cycles. The spatial coordinates of each detection point are determined by combining this with the circumference dimensions of the detection ring. Then, control parameters such as the movement trajectory, speed, and dwell time of the detection ring 2 between each section are calculated using a kinematic model to obtain the circumference path parameters. The specific parameter calculations are based on the principles of equipment kinematics and geometric positioning, and are determined by those skilled in the art according to the detection requirements; therefore, they will not be elaborated upon here.

[0189] S62: Based on the surrounding path parameters, control the movement of the detection ring 2 along the tower column axis and acquire segmented image information.

[0190] Segmented image information refers to local detection images acquired at different locations. Segmented image information is obtained by controlling the detection loop 2 to move along the planned path and acquire images segment by segment.

[0191] Once the surrounding path parameters are obtained, the detection ring 2 needs to be controlled to move along the tower axis according to the surrounding path parameters, and segmented image information needs to be collected for subsequent steps.

[0192] S63: Generate stitched image information based on segmented image information.

[0193] Image stitching information refers to the complete detection image formed by stitching together segmented images.

[0194] Image stitching technology can be used to stitch segmented image information into a stitched image. Image stitching technology is common knowledge in this field and will not be elaborated upon here.

[0195] S64: Generate bolt detection values ​​based on stitched image information and preset bolt features.

[0196] The stitched image information is used as the detection image information in S34 above to generate bolt detection values, and then the subsequent step of determining the diameter of the distribution circle is performed.

[0197] Also includes:

[0198] S70: Determine bolt installation locations based on single-tube tower number.

[0199] The bolt installation position refers to the theoretical installation position of anchor bolt 3 on the tower base.

[0200] The bolt installation positions are obtained by querying a pre-set bolt position database. This database records the theoretical installation position coordinates of bolts corresponding to different single-tube tower numbers. The bolt position database is pre-established by those skilled in the art based on the arrangement diagram of anchor bolts 3 in the design drawings of single-tube tower 1, and will not be elaborated here.

[0201] S71: Determine whether there are preset foreign object features at the bolt installation position from the detected image information.

[0202] Foreign object characteristics refer to the visual features of obstructions that affect the identification of anchor bolts 3. These foreign object characteristics are pre-defined by those skilled in the art and will not be elaborated upon here.

[0203] By judging whether there are foreign objects at the bolt installation location from the detected image information, we can know whether there are obstructions in the current detection environment that affect the recognition accuracy of anchor bolts 3.

[0204] S72: When foreign object features are present, identify bolt features from the detected image information to obtain the number of remaining relative bolt groups.

[0205] The number of remaining relative bolt groups refers to the number of relative bolt groups that can still be identified even when obscured.

[0206] The number of remaining relative bolt groups can be obtained by identifying the relative bolt groups that can still be identified even when obscured and counting them.

[0207] When there are foreign objects at the bolt installation location, it indicates that foreign objects are obstructing anchor bolt 3. The number of remaining bolt groups needs to be determined first for subsequent steps.

[0208] S73: When the number of remaining relative bolt groups is less than the preset required number of bolt groups, foreign matter is handled using the preset foreign matter handling method.

[0209] Foreign object handling methods refer to methods used to remove or avoid obstructions. Specific foreign object handling methods will be described in detail in subsequent sections S80 to S84, and will not be repeated here.

[0210] When the number of remaining relative bolt groups is less than the required number of bolt groups, it means that more relative bolt groups are needed. Therefore, foreign matter removal methods should be used to remove foreign matter before subsequent steps.

[0211] S74: When the number of remaining relative bolt groups is not less than the preset required number of bolt groups, generate bolt detection values ​​based on the detected image information and preset bolt features.

[0212] When the number of remaining relative bolt groups is not less than the required number of bolt groups, it means that there are enough remaining relative bolt groups for inspection, and the bolt inspection value generation step can be carried out.

[0213] Foreign object handling methods include:

[0214] S80: Based on the detected image information, bolt features, and foreign object features, the bolt occlusion status is obtained.

[0215] Bolt obstruction status refers to the comprehensive evaluation result of the number, location distribution, and degree of obstruction of anchor bolts 3.

[0216] First, the number of anchor bolts 3 covered by foreign object features is counted. Then, the relative position of the obscured parts of each anchor bolt 3 within the bolt outline is analyzed. Finally, the degree of obstruction is classified according to the ratio of the obscured area to the total area of ​​the bolt outline, and the bolt obstruction status is obtained by combining these criteria. Specific evaluation standards are determined by those skilled in the art based on the required recognition accuracy and will not be elaborated here.

[0217] S81: The number of additional bolt groups required is determined based on the number of existing bolt groups and the number of bolt groups needed.

[0218] The increase in the number of bolt sets required refers to the relative number of bolt sets that need to be added.

[0219] The increase in the required number of bolt sets can be obtained by calculating the difference between the required number of bolt sets and the remaining relative number of bolt sets.

[0220] S82: Determine the priority of critical bolts based on bolt obstruction status and bolt installation location.

[0221] The critical bolt priority refers to the order of importance of the anchor bolts 3 that need to be treated first.

[0222] The priority of critical bolts is determined by comprehensively analyzing the geometric relationship between bolt obstruction status and bolt installation positions. First, the degree of obstruction (e.g., complete obstruction, partial obstruction) and the position on the distribution circle of each anchor bolt 3 are assessed. Anchor bolts 3 with less obstruction and capable of quickly forming a complete relative bolt group after cleaning are prioritized. Second, considering the angular distribution of bolt installation positions, the contribution of each obstructed anchor bolt 3 to the formation of the relative bolt group is calculated; the higher the contribution, the higher the priority. The specific evaluation algorithm is based on the principle of geometric distribution optimization and can be configured by those skilled in the art according to site requirements; it will not be elaborated here.

[0223] S83: Increase the number of bolt groups and the priority of critical bolts based on requirements to generate air blowing parameters.

[0224] The blowing parameters refer to the set of parameters that control the operation of the blowing device, including blowing pressure, blowing duration, blowing angle, and coordinates of the point of action.

[0225] The air blowing parameters are obtained by consulting a preset air blowing reference table. This table records the air blowing parameters corresponding to different combinations of increased bolt group numbers and critical bolt priority, and is manually configured and established by those skilled in the art based on cleaning effect test data, which will not be elaborated here. Based on the increased bolt group number obtained in S81 and the critical bolt priority obtained in S82, the corresponding air blowing parameters are obtained by looking up the table.

[0226] S84: Based on the blowing parameters, control the blowing device preset on the detection ring 2 to perform blowing operation in order to handle the obstruction of foreign objects.

[0227] An air blowing device is a pneumatic cleaning device used to remove foreign objects.

[0228] The blowing device is controlled to blow air onto the foreign object according to the blowing parameters, thereby removing the obstruction of the foreign object.

[0229] Also includes:

[0230] S90: Collect regional meteorological data.

[0231] Regional meteorological data refers to weather parameters in the area where the single-tube tower 1 is installed, including wind speed, rainfall, etc.

[0232] Regional meteorological data is obtained by collecting environmental data in real time through meteorological sensors.

[0233] S91: Environmental risk assessment values ​​are obtained based on regional meteorological data.

[0234] Environmental risk assessment value refers to the risk assessment of the impact of environmental conditions on the detection.

[0235] Environmental risk assessment values ​​are obtained by querying a pre-set risk assessment lookup table. This lookup table records environmental risk assessment values ​​corresponding to different combinations of meteorological data for different regions. The risk assessment lookup table is manually configured and established by those skilled in the art based on the correlation analysis results of historical meteorological data and the impact on testing quality, and will not be elaborated here.

[0236] S92: Determine whether the environmental risk assessment value exceeds the preset safety threshold.

[0237] A safety threshold refers to the boundary value of the environmental conditions that allow for testing. Safety thresholds are set in advance by those skilled in the art and will not be elaborated upon here.

[0238] By determining whether the environmental risk assessment value exceeds the safety threshold, we can determine whether subsequent testing ring 2 encirclement operations can be carried out.

[0239] S93: When the environmental risk assessment value does not exceed the preset safety threshold, continue to collect regional meteorological data, and control detection ring 2 continues to perform circling operation.

[0240] When the environmental risk assessment value does not exceed the safety threshold, it means that the subsequent detection ring 2 circling operation can be carried out. At the same time, it is necessary to continue to collect regional meteorological data and then control detection ring 2 to continue the circling operation.

[0241] S94: When the environmental risk assessment value exceeds the preset safety threshold, suspend the surrounding operation of detection ring 2.

[0242] When the environmental risk assessment value exceeds the safety threshold, it means that subsequent operations cannot be carried out, and the operation of the detection ring 2 should be suspended.

[0243] Based on the same inventive concept, embodiments of the present invention provide a detection system for the distribution circle diameter of anchor bolts on a single-tube tower, comprising:

[0244] The data acquisition module is used to acquire single-tube tower image information, prism installation location, bolt center point coordinates, bolt surface images, single-tube tower number, detection image information, pre-inspection image information, segmented image information, and regional meteorological data.

[0245] The memory is used to store the program for implementing a method for detecting the distribution circle diameter of anchor bolts in a single-tube tower;

[0246] The processor is used to load and execute programs stored in memory.

[0247] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device, and unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0248] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method for detecting the diameter of the distribution circle of anchor bolts in a single-tube tower, characterized in that, include: Acquire image information of a single-tube tower; Based on the image information of the single-tube tower and the preset bolt features, specific relative bolts are identified, and the center point is determined by the preset relative bolt center point determination method, thereby obtaining the relative bolt center point; The standard position for prism mounting is determined based on the relative bolt center points, and the prism mounting position is collected. When the prism is installed at the same standard position as the prism, collect the coordinates of the bolt center point. Calculate the horizontal distance of the bolts based on the coordinates of the bolt center point; The diameter of the distribution circle is obtained based on the horizontal distance between the bolts.

2. The method for detecting the distribution circle diameter of anchor bolts in a single-tube tower according to claim 1, characterized in that, The method for determining the relative bolt center point includes: Acquire images of the bolt surface relative to the specific bolt; Bolt features are identified from bolt surface images to obtain the bolt's outer contour; Generate the contour diagonal based on the bolt's outer contour; The relative bolt center point is obtained by finding the intersection of the diagonals of the profile.

3. The method for detecting the distribution circle diameter of anchor bolts in a single-tube tower according to claim 1, characterized in that, It also includes methods for detecting the diameter of the distribution circle: Collect the single-tube tower number; The dimensions of a single-tube tower are obtained based on its number; The model of the testing ring is matched according to the size of the single-tube tower; The detection ring (2) corresponding to the detection ring model is fixed around the single tube tower (1), and detection image information is collected; Bolt detection values ​​are generated based on the detected image information and preset bolt features; The diameter of the distribution circle verification is determined by the bolt inspection value; If the verification diameter of the distribution circle matches the diameter of the distribution circle, the measurement of the distribution circle diameter is complete.

4. The method for detecting the distribution circle diameter of anchor bolts in a single-tube tower according to claim 3, characterized in that, It also includes methods for generating bolt inspection values: Bolt features are scanned and identified from the detected image information to obtain the bolt position coordinate set; The bolt position coordinate set is grouped to obtain relative bolt groups; The center point of the detected bolt is determined by combining the detected image information and the relative bolt group; The spacing measurement value is obtained based on the relative bolt center point; The bolt inspection value is obtained based on the spacing measurement value.

5. The method for detecting the distribution circle diameter of anchor bolts in a single-tube tower according to claim 3, characterized in that, Also includes: The detection ring surround size is obtained based on the detection ring model; Compare the dimensions of the detection ring with the dimensions of a single-tube tower. When the size of the detection ring is smaller than the size of a single-tube tower, pre-detection image information is collected; Bolt feature recognition is performed on the pre-inspection image information to determine the relative number of bolt groups; When the relative number of bolt groups is greater than the preset required number of bolt groups, bolt detection values ​​are generated based on the detected image information and preset bolt features; When the relative number of bolt groups is not greater than the preset required number of bolt groups, the preset surround adjustment method is activated to perform surround adjustment, and bolt detection values ​​are generated after adjustment.

6. The method for detecting the distribution circle diameter of anchor bolts in a single-tube tower according to claim 5, characterized in that, The surrounding adjustment method includes: When the relative number of bolt groups is not greater than the preset required number of bolt groups, the required number of times to wrap around is calculated based on the single-tube tower size and the detection ring wrapping size. The orbiting path parameters are generated based on the required number of orbits, the size of the detection ring, and the preset initial orbiting position. Based on the surrounding path parameters, the detection ring (2) is controlled to move along the tower column axis and segmented image information is acquired; Generate stitched image information based on segmented image information; Bolt detection values ​​are generated based on stitched image information and preset bolt features.

7. The method for detecting the distribution circle diameter of anchor bolts in a single-tube tower according to claim 3, characterized in that, Also includes: The bolt installation location is determined based on the single-tube tower number; Determine whether there are any pre-defined foreign object features at the bolt installation location from the detected image information; When foreign object features are present, bolt features are identified from the detected image information to obtain the number of remaining relative bolt groups; When the number of remaining relative bolt groups is less than the preset required number of bolt groups, foreign matter is handled using the preset foreign matter handling method. When the number of remaining relative bolt groups is not less than the preset required number of bolt groups, bolt detection values ​​are generated based on the detected image information and preset bolt features.

8. The method for detecting the distribution circle diameter of anchor bolts in a single-tube tower according to claim 7, characterized in that, The foreign object removal method includes: The bolt occlusion state is determined based on the detected image information, bolt features, and foreign object features. The required additional bolt sets are determined based on the remaining relative number of bolt sets and the required number of bolt sets. Determine the priority of critical bolts based on bolt obstruction status and bolt installation location; Increase the number of bolt groups and prioritize key bolts according to requirements to generate air blowing parameters; Based on the blowing parameters, the blowing device preset on the detection ring (2) is controlled to blow air to deal with the obstruction of foreign objects.

9. The method for detecting the distribution circle diameter of anchor bolts in a single-tube tower according to claim 3, characterized in that, Also includes: Collect regional meteorological data; Environmental risk assessment values ​​are obtained based on regional meteorological data; Determine whether the environmental risk assessment value exceeds the preset safety threshold; When the environmental risk assessment value does not exceed the preset safety threshold, regional meteorological data will continue to be collected, and the control detection ring (2) will continue to perform the circling operation. When the environmental risk assessment value exceeds the preset safety threshold, the operation of the detection ring (2) is suspended.

10. A detection system for the distribution circle diameter of anchor bolts on a single-tube tower, characterized in that, include: The acquisition module is used to acquire image information of the single-tube tower, the prism installation position, and the coordinates of the bolt center point; A memory for storing a program that implements a method for detecting the distribution circle diameter of anchor bolts in a single-tube tower as described in any one of claims 1 to 9; The processor is used to load and execute programs stored in memory.

Images