Detection method for detecting gas leakage

Abstract

The invention relates to the technical field of gas leakage detection, and discloses a detection method for detecting gas leakage, which comprises the following steps of: mounting a tire to be detected on a test bracket, completely immersing the tire into a test pool through vibration and downward movement operation, and judging whether a flat tire exists or not by observing the appearance and the continuous condition of bubbles on the water surface. And after continuous bubbles are detected, marking the continuous bubbles as to-be-verified positions, and screening out suspected tires in combination with the intersection of the verification positions and the tire intervals. And through primary screening and rotary screening, first-class and second-class flat tires are further distinguished. For one type of flat tires, the rotation of the flat tires is controlled, so that the matching verification positions coincide with the datum line; and for the second-class flat tires, monitoring the movement rules of a plurality of verification positions, and adjusting the positions or marking the tires as key tires. According to the method, through layer-by-layer screening and adjustment, precise detection of gas leakage is realized, the detection efficiency is effectively improved, and meanwhile, subsequent manual maintenance and treatment are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of gas leakage detection, and in particular to a detection method for detecting gas leakage. Background Art

[0002] In the inspection of modern vehicles and mechanical equipment, gas leakage has always been a potential safety hazard that needs to be paid special attention to, especially when it comes to the use of tires. As the only part of the vehicle that contacts the ground, the air tightness of the tire directly affects the driving safety and stability of the vehicle. Traditional tire gas leakage detection methods usually rely on manual inspection and simple bubble methods. Although these methods are effective in some cases, they have problems such as low efficiency and inability to fully detect tiny leaks. The accuracy and efficiency of gas leakage detection have always been the difficulty in the research of tire detection technology.

[0003] At present, common gas leak detection methods mainly include air pressure monitoring, infrared thermal imaging, helium leak detection and bubble method. Air pressure monitoring technology determines whether a leak occurs by detecting changes in air pressure in the tire, but this method is not sensitive to small leaks and may require frequent monitoring, causing inconvenience; infrared thermal imaging technology relies on the difference in infrared radiation at different temperatures to detect leaks, which is suitable for the detection of large-area leaks, but because it relies on temperature differences, it cannot effectively detect small gas leaks, and the equipment is relatively expensive; helium leak detection uses helium as a gas for inspection. Because of its small molecules, helium can leak through tiny gaps, so it can detect smaller leaks, but helium is expensive and has a certain impact on the environment, making it difficult to popularize.

[0004] The bubble method is a common and cost-effective leak detection method. It determines whether there is a leak by immersing the object to be tested in water and observing whether bubbles emerge. However, the application of the traditional bubble method still relies on manual judgment of the bubble position, and can only detect one tire at a time, lacking efficient and accurate automated detection methods.

[0005] To this end, the present invention proposes a method for batch gas leakage detection of tires based on the basic principle of the bubble method and combined with automation technology. Summary of the invention

[0006] The present invention provides a detection method for detecting gas leakage, which helps to solve the problems mentioned in the above background technology.

[0007] The present invention provides the following technical solution: a detection method for detecting gas leakage, comprising: For each tire to be tested: Obtain two circular surfaces surrounded by the edge contour of the tire to be tested, which are respectively recorded as the first circular surface and the second circular surface of the tire to be tested; Obtain the centers of the first and second circular surfaces respectively, and record them as the first and second circular centers respectively; Select N tires to be tested and install them on the test bracket so that the first and second centers of each tire to be tested are passed through by the test bracket; The test bracket is a straight rod; A test stand equipped with N tires to be tested is recorded as a test set stand; Control the test frame to be in a vertical state so that the No. 1 circular surface of the tire to be tested on the test frame remains horizontal; Transfer the vertical inspection assembly rack to the top of the test pool; Control the inspection group frame to vibrate in the horizontal direction and move vertically downward; When all the tires to be tested on the inspection assembly frame are immersed in the water in the test tank, the inspection assembly frame is controlled to stop moving, and the inspection assembly frame is controlled to stop vibrating; Observe the water surface in the test pool to check whether bubbles continue to appear; If no continuous bubbles are detected, it is determined that there is no gas leakage in the tires to be tested on the inspection rack; If continuous bubbles are detected, the tire under test with gas leakage is marked; Adjust the position of the tire to be tested that has air leakage.

[0008] Optionally, the detecting whether bubbles continue to appear includes: S1. Set the duration for defining the continuous appearance of bubbles, which is recorded as the duration limit; S2. Setting a time interval for determining whether bubbles continue to appear, recorded as the continuous interval; S3. When bubbles are observed to appear on the water surface of the test pool, the location where the bubbles appear is marked as the bubble position; S4, for each bubble position, start timing from when a bubble appears at the bubble position; S5. When a bubble is observed again at the bubble position within the continuous interval, the timing continues; S6. When no bubble is observed to appear again at the bubble position within the continuous interval, the timing is stopped; S7. When the time duration of a certain bubble position is ≥ the duration limit, it is determined that the continuous appearance of bubbles is detected; S8. When the time duration of all bubble positions is less than the duration limit, it is deemed that no continuous bubbles are detected.

[0009] Optionally, if continuous bubbles are detected, marking the tire to be tested as having gas leakage comprises: Obtain the center point of the test bracket and record it as the bracket center point; Control the inspection assembly frame to rotate 90 degrees around the center point of the bracket so that the No. 1 circular surface of the tire to be tested on the inspection assembly frame is perpendicular to the horizontal plane; Observe the water surface in the test pool; Execute steps S1-S8 to obtain the bubble position where bubbles continue to appear, and mark the bubble position as a position to be verified; Mark the suspected tire according to each position to be verified; Perform primary screening and rotary screening on suspected tires, and mark the tires to be tested that have gas leaks.

[0010] Optionally, marking the suspected tire according to each position to be verified includes: Take any one of the two ends of the inspection frame as the marking end; Make a plane through the marked end parallel to the No. 1 circular surface of the tire to be tested on the inspection rack, and record it as the end surface; Distance division is performed on each bit to be verified, specifically: Obtain the length of the test stand and divide it by N. The result is taken as the length of each tire to be tested on the test stand, recorded as the single tire length; Take half of the single fetus length as the half fetus length; Obtain the vertical distance between the position to be verified and the end face, and record it as the end position distance of the position to be verified; Calculate the end distance plus half the fetal length, and record the result as the distal distance of the position to be verified; Calculate the end distance minus half the fetal length and record the result as the proximal distance of the position to be verified; The near-end distance and the far-end distance form a closed interval, where the near-end distance is the left endpoint of the interval and the far-end distance is the right endpoint of the interval, and the interval is recorded as the verification interval of the position to be verified; For each tire to be tested on the inspection rack, the tire interval acquisition strategy is executed.

[0011] Optionally, the tire interval acquisition strategy is executed for each tire to be tested on the inspection rack, specifically: Obtain the first and second center points of the tire to be tested; Obtain the vertical distances between the center of the first circle and the center of the second circle and the end face, respectively, and record them as the center distance of the first circle and the center distance of the second circle; Compare the center distance of circle 1 with the center distance of circle 2, take the smaller one as the proximal center distance, and the larger one as the distal center distance; The proximal end center distance and the distal end center distance form a closed interval, wherein the proximal end center distance is used as the left end point of the interval and the distal end center distance is used as the right end point of the interval, and the interval is recorded as the tire interval of the tire to be tested; Compare each tire interval with the verification interval, select tire intervals that have intersections with the verification interval, and mark them as marked intervals; The tire to be tested corresponding to each marked interval is obtained respectively, and marked as a suspected tire.

[0012] Optionally, the primary screening and rotary screening of suspected tires to mark tires to be tested with gas leakage includes: The primary screening is specifically: Obtain the position of each suspected tire on the inspection rack respectively; If the two adjacent tires to be tested of a suspected tire are not suspected tires, the suspected tire is marked as a tire to be tested with gas leakage, and the suspected tire is deleted; The remaining suspected tires are subjected to rotational screening.

[0013] Optionally, the remaining suspected tires are subjected to rotational screening, specifically: Among all the remaining suspected tires, one suspected tire is selected each time to execute the rotation screening strategy until all the remaining suspected tires are selected once; Record the currently selected suspected tire as the selected tire; Control the selected tire to rotate around the inspection assembly frame and observe the changes in the position of the bubbles on the water surface of the test pool, specifically: Before the tire is controlled to rotate around the inspection assembly frame, the position of the position to be verified on the water surface of the test pool is recorded as the initial position; Control the selected tire to rotate four times, each time rotating 90 degrees; After the tire is rotated 90 degrees each time, steps S1 to S8 are executed to obtain the bubble position where bubbles continue to appear, and the bubble position is recorded as the rotation change position; Compare the rotational changes obtained by four rotations with the initial position; If there is a rotation change position after a certain rotation that is different from the initial position, the currently selected tire is marked as a tire to be tested with gas leakage, and the tire to be tested is marked as a type of leaking tire, and the position to be verified that has changed is marked as a type of matching verification position of the type of leaking tire; If two or more rotational change positions after a certain rotation are different from the initial positions, the currently selected tire is marked as a tire to be tested with gas leakage, and the tire to be tested is marked as a second-class leaking tire, and all positions to be verified that have changed positions are marked as second-class matching verification positions of the second-class leaking tire; If each rotation change position after four rotations is the same as the initial position, the currently selected tire is deleted from the suspected tires.

[0014] Optionally, the step of adjusting the position of the tire to be tested with gas leakage includes: Obtain the center of circle No. 1 and center No. 2 of any specified tire, and draw a straight line passing through the center of circle No. 1 and center No. 2, which is recorded as the reference straight line; A plane perpendicular to the horizontal plane is made through the reference line and is called the reference plane. Draw a horizontal line on the water surface of the test pool so that the horizontal line is parallel to the reference line and lies within the reference plane, and record the horizontal line as the reference line; The two sides of the reference plane are respectively recorded as the first side and the second side, and the direction from the first side horizontally pointing to the second side is recorded as the first direction, and the direction from the second side horizontally pointing to the first side is recorded as the second direction; The water surface of the test pool is divided into two areas using a reference line, wherein the area on the first side of the reference plane is recorded as the first area, and the area on the second side of the reference plane is recorded as the second area.

[0015] Optionally, the step of adjusting the position of the tire to be tested with gas leakage further includes: Perform a type of position adjustment on a type of flat tire, including: Select one flat tire of the first category each time to adjust its position until all flat tires of the first category have undergone one-category position adjustment; Recording a currently selected type of flat tire as a designated tire; Obtain a type of matching verification bit corresponding to the specified tire, recorded as the specified verification bit of the specified tire; Control the designated tire to rotate in a first direction, and when the position of the designated verification position changes, control the designated tire to stop rotating, and obtain the position change of the designated verification position; If the position change of the designated verification position is: moving from the original position to the first direction, then obtaining the position of the designated verification position after the designated tire stops rotating, and executing the designated verification position adjustment strategy; If the position change of the designated verification position is: moving from the original position to the second direction, the designated tire is controlled to rotate in the first direction, and the position change of the designated verification position is monitored during the rotation process. When the position change of the designated verification position is detected to be converted into moving in the first direction, the designated tire is controlled to stop rotating, and the position of the designated verification position after the designated tire stops rotating is obtained, and the designated verification position adjustment strategy is executed; The obtaining of the position of the designated verification position after the designated tire stops rotating, and executing the designated verification position adjustment strategy, are specifically: If the designated verification position is in the first area after the designated tire stops rotating, the designated tire is controlled to rotate in the first direction. When the designated verification position coincides with the reference line, the designated tire is controlled to stop rotating, thereby completing a type of position adjustment of the current designated tire. If the designated verification position is in the second area after the designated tire stops rotating, the designated tire is controlled to rotate in the second direction. When the designated verification position coincides with the reference line, the designated tire is controlled to stop rotating, thereby completing a type of position adjustment of the current designated tire.

[0016] Optionally, the step of adjusting the position of the tire to be tested with gas leakage further includes: Perform a second type of position adjustment on a second type of flat tire, specifically: Select one of the second-category flat tires for position adjustment each time until all the second-category flat tires have undergone a second-category position adjustment; Recording a currently selected type of flat tire as a selected tire; Obtain all second-class matching verification bits corresponding to the selected tire, and record them as the selected verification bits of the selected tire; Control the selected tire to rotate one circle, and monitor the position change of each selected verification position during the rotation; If during the selection of the tire rotation, it is detected that each selection verification position moves in the first direction at the same time, then the selection verification position adjustment strategy is executed; If during the entire process of the selected tire rotating, there is a selected verification position that moves in the opposite direction to the other selected verification positions, the selected tire will be marked as a key tire and a manual comprehensive inspection will be performed on the key tire; The selection verification bit adjustment strategy includes: Control the selected tire to rotate in a first direction, and when it is detected that each selected verification position moves in the first direction at the same time, control the selected tire to stop rotating; Traverse each selection verification bit in turn in the first direction, and obtain the first selection verification bit and the last selection verification bit traversed, which are recorded as the first verification bit and the last verification bit respectively; Draw a horizontal straight line through the first verification position and make it perpendicular to the No. 1 circular surface of the selected tire. Record this horizontal straight line as the first straight line; Get the vertical distance between the last verification digit and the first straight line, and record it as the first-to-last distance; With the first verification position as the endpoint, draw a ray perpendicular to the first straight line and in the same horizontal plane as the first straight line, and record it as the reference ray; Select a point on the reference ray so that the distance between the point and the first straight line is equal to half of the distance between the first and last lines, and record the point as the reference point; Get the location of the reference point; If the reference point is in the first area, the selected tire is controlled to rotate in the first direction. When the reference point coincides with the reference line, the selected tire is controlled to stop rotating, thereby completing the second type of position adjustment of the currently selected tire. If the reference point is in the second area, the selected tire is controlled to rotate in the second direction. When the reference point coincides with the reference line, the selected tire is controlled to stop rotating, thereby completing the second type of position adjustment of the currently selected tire.

[0017] The present invention has the following beneficial effects: 1. During the test, by passing the center of the first circle and the center of the second circle of the tire to be tested through the test bracket, the position of the tire in the test device can be ensured to be consistent at all times; this precise positioning method can effectively avoid the error of the test result caused by the tilt or offset of the tire; at the same time, this positioning method simplifies the installation and operation process of the device, so that the test device can quickly adapt to the needs of batch testing, thereby improving the test efficiency; in addition, through the unified passing method of the center of the circle, the position of the tire can be guaranteed to be unified during vibration and movement, and in the subsequent test process, when it is necessary to control the rotation of the tire, it can be ensured that the tire can rotate around the center of the circle, which is convenient for confirming the test results, and further improves the stability of the test and the credibility of the results.

[0018] 2. When the inspection assembly frame moves vertically downward, the inspection assembly frame is controlled to vibrate horizontally to ensure that the entire surface of the tire can be quickly and completely immersed in water. This step can avoid the problem that some parts of the tire cannot contact the water surface due to static immersion. By introducing horizontal vibration, the fluidity of water can be promoted, so that the gaps on the tire surface are in full contact with the water, thereby avoiding the retention of bubbles in the gaps and the bubbles in the gaps rising to the water surface during subsequent testing, which will cause errors in the testing. This method can help improve the accuracy of the test and avoid interference from other factors.

[0019] 3. By setting two standards, the duration limit and the duration interval, it is possible to accurately determine whether the bubbles are caused by leakage rather than interference from environmental factors; the introduction of the duration limit helps to screen out real leaking bubbles and avoid short-lived bubbles being misjudged as leaks; the duration interval further ensures the real-time and rigorous nature of the detection, and by limiting the interval time, ensures that the leakage can be quickly captured; this judgment method can effectively improve the accuracy of the detection and make the test results more accurate and reliable.

[0020] 4. By dividing the distance between the position to be verified and the end face of the test bracket, the verification interval of each position to be verified is calculated, and compared with the tire interval formed by the center of the first circle and the center of the second circle of the tire to be tested, so as to accurately screen out the tire to be tested that has an intersection with the verification interval; this method improves the accuracy of matching the bubble position with the corresponding leaking tire, and effectively reduces the occurrence of misjudgment and missed judgment; by converting the complex spatial positioning problem into a mathematical problem of interval intersection, the calculation efficiency and ease of operation are significantly improved; with the marking interval as the core, data screening is combined with marking, which provides a reliable basis for the subsequent judgment and classification of leaking tires; by calculating the half-tire length and the end position distance, the rationality and applicability of the interval division are ensured, which is helpful to adapt to the detection of tires of different specifications.

[0021] 5. Through the primary screening method, the suspected tires are effectively classified and screened initially, thereby improving the accuracy and efficiency of subsequent testing. This solution determines whether the two adjacent tires to be tested are also suspected tires by obtaining the specific position of each suspected tire on the inspection rack. If it is found that the adjacent tires of a suspected tire are not suspected tires, the tire is directly marked as a tire to be tested with gas leakage and deleted from the list of suspected tires. This logic infers the possibility of leakage based on the mutual correlation between suspected tires. By eliminating independent suspected tires, it can quickly identify obvious abnormal situations and avoid unnecessary waste of resources in subsequent steps. For the remaining suspected tires, rotary screening is further performed to more accurately locate the leakage points and their distribution positions.

[0022] 6. By controlling the suspected tire to rotate four times around the inspection frame and observing the changes in the bubble position on the water surface of the test pool, the tires with gas leakage are screened out and classified and marked. This method uses the rotation action to match the bubble position change with the specific tire, thereby accurately locating the leaking tire; through position comparison, Class I or Class II leaking tires are screened out, effectively improving the accuracy of the leakage grade classification; by excluding tires with no changes, misjudgment is reduced and the detection process is optimized; this method, combined with the analysis of dynamic bubble position, helps to enhance the automation capability and reliability of the detection system.

[0023] 7. By controlling the rotation of the tire and real-time monitoring of the change in the position of the bubble, the leak position of a type of leaking tire can be accurately judged and adjusted, significantly improving the adjustment efficiency and accuracy. In operation, by selecting a type of leaking tire one by one, the complexity of adjusting multiple tires at the same time is avoided, and the focus and accuracy of each adjustment are ensured. The core strategy is to judge the distribution of the leak position based on the relationship between the change direction of the bubble position and the rotation direction of the tire. If the bubble position change is the same as the rotation direction, it indicates that the leak position is located in the upper half of the tire. At this time, no complex adjustment is required. You only need to control the tire rotation to align the bubble position with the baseline to complete the correction. If the bubble position change is opposite to the rotation direction, it indicates that the leak position is in the lower half of the tire. In order to ensure the convenience and consistency of subsequent adjustment operations, it is necessary to first adjust the leak position to the upper half by rotating the tire, and then align the bubble position with the baseline. This step-by-step adjustment method combines the advantages of real-time monitoring and dynamic correction. Through accurate judgment and reasonable adjustment sequence, it simplifies the operation steps to the maximum extent, avoids unnecessary complex adjustments, and improves overall efficiency. At the same time, during the adjustment process, the plan fully considered the impact of the spatial distribution of the leakage location on the convenience of operation. By uniformly adjusting the leakage points to the upper part, it not only provided a clearer adjustment benchmark for subsequent operations, but also significantly reduced the errors that may occur during the adjustment process.

[0024] 8. This technical solution provides an efficient and accurate positioning and adjustment method for tires with gas leakage by introducing a geometric reference system and a dynamic adjustment strategy. First, the solution divides the water surface of the test pool into clear geometric areas by constructing reference lines, reference planes and baselines, providing a stable spatial reference frame for subsequent operations. The establishment of this geometric system makes the description and adjustment of the tire position more intuitive and standardized, ensuring that the adjustment process is highly consistent and scientific. During the operation, by monitoring the position changes of the designated verification position, the solution adopts a dynamic adjustment strategy to flexibly control the rotation direction and stop position of the tire according to the different conditions of the area where the verification position is located, thereby achieving accurate correction of the tire leakage point. This combination of real-time monitoring and precise control significantly improves the accuracy of the adjustment and avoids the errors that may be caused by human judgment. At the same time, the step-by-step adjustment operation mode selects the leaking tires one by one for position correction, which not only reduces the complexity of adjusting multiple tires at the same time, but also facilitates the operator to observe the effect of each adjustment in detail, effectively improving the efficiency of problem solving. At the same time, this method adjusts the position of a type of flat tires so that the leaking positions of the type of flat tires on the inspection frame remain in a straight line, which facilitates the subsequent manual accurate determination of the leaking positions and further improves the detection efficiency.

[0025] 9. By selecting a second-class leaking tire each time, monitor the movement direction of its multiple selected verification positions during the rotation process. If it is found that all leaking points can move synchronously in the first direction, it means that the leaking points are distributed in the same half of the tire, and the processing process can be simplified by further adjustment; if there is a situation where the movement direction of the leaking point is opposite to that of other leaking points, it means that the leaking points are distributed in different halves of the tire. The tire is marked as a key tire and transferred to manual comprehensive inspection to ensure the integrity and accuracy of the inspection. This step-by-step judgment and screening mechanism effectively avoids the risk of missed detection and misjudgment. When synchronous adjustment is possible, the solution obtains the first verification position and the last verification position and their midpoint positions, and combines precise geometric calculations to adjust the midpoint to the baseline position. This adjustment method uses the coincidence relationship between the reference point and the baseline to ensure the symmetry and reasonable distribution of the leaking point, while simplifying the subsequent manual precise positioning of the leaking point. In addition, the solution's dynamic calculation and rotation control of the reference point further optimizes the process logic of the adjustment, achieving the highest accuracy with minimal operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the tire to be tested of the present invention.

[0027] Figure 2 Schematic diagram of the test bracket of the present invention.

[0028] Figure 3 It is a schematic diagram of the marking end of the present invention.

[0029] Figure 4 It is a baseline schematic diagram of the present invention. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment, a detection method for detecting gas leakage, comprising: The motorcycle tire to be tested for gas leakage is recorded as the tire to be tested; For each tire to be tested: Reference Figure 1 , obtain two circular surfaces surrounded by the edge contour of the tire to be tested, which are respectively recorded as the first circular surface and the second circular surface of the tire to be tested; Obtain the centers of the first and second circular surfaces respectively, and record them as the first and second circular centers respectively; Reference Figure 2, select N tires to be tested and install them on the test bracket, so that the center of the first circle and the center of the second circle of each tire to be tested are passed by the test bracket; during the detection process, by passing the center of the first circle and the center of the second circle of the tire to be tested by the test bracket, it can be ensured that the position of the tire in the detection device is always consistent; this precise positioning method can effectively avoid the error of the detection result caused by the tilt or offset of the tire; at the same time, this positioning method simplifies the installation and operation process of the device, so that the detection device can quickly adapt to the needs of batch detection, thereby improving the detection efficiency; in addition, through the unified passing method of the center of the circle, it can also ensure that the position of the tire is unified during vibration and movement, and in the subsequent detection process, when it is necessary to control the rotation of the tire, it can be ensured that the tire can rotate around the center of the circle, which is convenient for confirming the detection result, and further improves the stability of the detection and the credibility of the result.

[0032] Reference Figure 2 , the test bracket is a straight rod; A test stand equipped with N tires to be tested is recorded as a test set stand; Control the test frame to be in a vertical state so that the No. 1 circular surface of the tire to be tested on the test frame remains horizontal; Transfer the vertical inspection assembly rack to the top of the test pool; Control the inspection group frame to vibrate in the horizontal direction and move vertically downward; When all the tires to be tested on the inspection frame are immersed in the water in the test pool, the inspection frame is controlled to stop moving and to stop vibrating; when the inspection frame moves vertically downward, the inspection frame is controlled to vibrate horizontally to ensure that the entire surface of the tire can be quickly and completely immersed in water; this step can avoid the problem that some parts of the tire cannot contact the water surface due to static immersion; through the introduction of horizontal vibration, the fluidity of water can be promoted, so that the gaps on the surface of the tire are in full contact with the water, thereby avoiding bubbles in the gaps and avoiding bubbles in the gaps from rising to the water surface during subsequent testing, which in turn causes errors in the testing. This method can help improve the accuracy of the test and avoid interference from other factors.

[0033] Observe the water surface in the test pool to check whether bubbles continue to appear; If no continuous bubbles are detected, it is determined that there is no gas leakage in the tires to be tested on the inspection rack; If continuous bubbles are detected, the tire under test with gas leakage is marked; Adjust the position of the tire to be tested that has air leakage.

[0034] The detecting whether bubbles continue to appear includes: S1. Set the duration for defining the continuous appearance of bubbles, which is recorded as the duration limit; S2. Set a time interval for judging whether bubbles appear continuously, recorded as the continuous interval. By setting the two criteria of continuous time limit and continuous interval, it is possible to accurately judge whether the bubbles are caused by leakage rather than interference from environmental factors. The introduction of the continuous time limit helps to screen out real leaking bubbles and avoid short-lived bubbles being misjudged as leaks. The continuous interval further ensures the real-time and rigorous nature of the detection, and ensures that the leakage can be quickly captured by limiting the interval time. This judgment method can effectively improve the accuracy of the detection and make the detection results more accurate and reliable.

[0035] S3. When bubbles are observed to appear on the water surface of the test pool, the location where the bubbles appear is marked as the bubble position; S4, for each bubble position, start timing from when a bubble appears at the bubble position; S5. When a bubble is observed again at the bubble position within the continuous interval, the timing continues; S6. When no bubble is observed to appear again at the bubble position within the continuous interval, the timing is stopped; S7. When the time duration of a certain bubble position is ≥ the duration limit, it is determined that the continuous appearance of bubbles is detected; S8. When the time duration of all bubble positions is less than the duration limit, it is deemed that no continuous bubbles are detected.

[0036] If bubbles are detected to continue to appear, marking the tire to be tested as having gas leakage includes: Obtain the center point of the test bracket and record it as the bracket center point; Control the inspection assembly frame to rotate 90 degrees around the center point of the bracket so that the No. 1 circular surface of the tire to be tested on the inspection assembly frame is perpendicular to the horizontal plane; Observe the water surface in the test pool; Execute steps S1-S8 to obtain the bubble position where bubbles continue to appear, and mark the bubble position as a position to be verified; Mark the suspected tire according to each position to be verified; Perform primary screening and rotary screening on suspected tires, and mark the tires to be tested that have gas leaks.

[0037] The method of marking a suspected tire according to each position to be verified includes: Reference Figure 3 , take any one of the two ends of the inspection frame as the marking end; Reference Figure 4 , make a plane through the marked end parallel to the No. 1 circular surface of the tire to be tested on the inspection rack, and record it as the end surface; Distance division is performed on each bit to be verified, specifically: Obtain the length of the test stand and divide it by N. The result is taken as the length of each tire to be tested on the test stand, recorded as the single tire length; Take half of the single fetus length as half fetus length; Obtain the vertical distance between the position to be verified and the end face, and record it as the end position distance of the position to be verified; Calculate the end distance plus half the fetal length, and record the result as the distal distance of the position to be verified; Calculate the end distance minus half the fetal length and record the result as the proximal distance of the position to be verified; The near-end distance and the far-end distance form a closed interval, where the near-end distance is the left endpoint of the interval and the far-end distance is the right endpoint of the interval, and the interval is recorded as the verification interval of the position to be verified; For each tire to be tested on the inspection rack, the tire interval acquisition strategy is executed.

[0038] The tire interval acquisition strategy is executed for each tire to be tested on the inspection rack, specifically: Obtain the first and second center points of the tire to be tested; Obtain the vertical distances between the center of the first circle and the center of the second circle and the end face, respectively, and record them as the center distance of the first circle and the center distance of the second circle; Compare the center distance of circle 1 with the center distance of circle 2, take the smaller one as the proximal center distance, and the larger one as the distal center distance; The proximal end center distance and the distal end center distance form a closed interval, wherein the proximal end center distance is used as the left end point of the interval and the distal end center distance is used as the right end point of the interval, and the interval is recorded as the tire interval of the tire to be tested; Compare each tire interval with the verification interval, select tire intervals that have intersections with the verification interval, and mark them as marked intervals; Get the tire to be tested corresponding to each marked interval respectively, and mark it as a suspected tire. By dividing the distance between the position to be verified and the end face of the test bracket, calculate the verification interval of each position to be verified, and compare it with the tire interval formed by the center of the first circle and the center of the second circle of the tire to be tested, so as to accurately screen out the tire to be tested that has an intersection with the verification interval; this method improves the accuracy of matching the bubble position with the corresponding flat tire, and effectively reduces the occurrence of misjudgment and missed judgment; by converting the complex spatial positioning problem into a mathematical problem of interval intersection, the calculation efficiency and ease of operation are significantly improved; with the marked interval as the core, the data screening is combined with the marking, which provides a reliable basis for the subsequent judgment and classification of flat tires; by calculating the half tire length and the end position distance, the rationality and applicability of the interval division are ensured, which is helpful to adapt to the detection of tires of different specifications.

[0039] The primary screening and rotary screening of suspected tires and marking tires to be tested with gas leakage include: The primary screening is specifically: Obtain the position of each suspected tire on the inspection rack respectively; If the two adjacent tires to be tested of a suspected tire are not suspected tires, the suspected tire is marked as a tire to be tested with gas leakage, and the suspected tire is deleted; The remaining suspected tires are subjected to rotational screening. The primary screening method is used to effectively classify and screen the suspected tires, thereby improving the accuracy and efficiency of subsequent testing. This solution determines whether the two adjacent tires to be tested are also suspected tires by obtaining the specific position of each suspected tire on the inspection rack. If it is found that none of the adjacent tires of a suspected tire are suspected tires, the tire is directly marked as a tire to be tested with gas leakage and deleted from the list of suspected tires. This logic infers the possibility of leakage based on the mutual correlation between suspected tires. By eliminating independent suspected tires, it can quickly identify obvious abnormal situations and avoid unnecessary waste of resources in subsequent steps. For the remaining suspected tires, further rotational screening is performed to more accurately locate the leakage point and its distribution position.

[0040] The remaining suspected tires are subjected to rotary screening, specifically: Among all the remaining suspected tires, one suspected tire is selected each time to execute the rotation screening strategy until all the remaining suspected tires are selected once; Record the currently selected suspected tire as the selected tire; Control the selected tire to rotate around the inspection assembly frame and observe the changes in the position of the bubbles on the water surface of the test pool, specifically: Before the tire is controlled to rotate around the inspection assembly frame, the position of the position to be verified on the water surface of the test pool is recorded as the initial position; Control the selected tire to rotate four times, each time rotating 90 degrees; After the tire is rotated 90 degrees each time, steps S1 to S8 are executed to obtain the bubble position where bubbles continue to appear, and the bubble position is recorded as the rotation change position; Compare the rotational changes obtained by four rotations with the initial position; If there is a rotation change position after a certain rotation that is different from the initial position, the currently selected tire is marked as a tire to be tested with gas leakage, and the tire to be tested is marked as a type of leaking tire, and the position to be verified that has changed is marked as a type of matching verification position of the type of leaking tire; If two or more rotational change positions after a certain rotation are different from the initial positions, the currently selected tire is marked as a tire to be tested with gas leakage, and the tire to be tested is marked as a second-class leaking tire, and all positions to be verified that have changed positions are marked as second-class matching verification positions of the second-class leaking tire; If each rotational change position after four rotations is the same as the initial position, the currently selected tire will be deleted from the suspected tires. By controlling the suspected tire to rotate around the inspection assembly frame four times and observing the changes in the bubble position on the water surface of the test pool, the tires with gas leakage are screened out and classified and marked. This method uses the rotation action to match the bubble position change with the specific tire, thereby accurately locating the leaking tire; by comparing the positions, the first or second type of leaking tires are screened out, effectively improving the accuracy of the leakage grade classification; by excluding tires with no changes, misjudgments are reduced and the detection process is optimized; this method, combined with the analysis of dynamic bubble positions, helps to enhance the automation and reliability of the detection system.

[0041] The step of adjusting the position of the tire to be tested with gas leakage comprises: Obtain the center of circle No. 1 and center No. 2 of any specified tire, and draw a straight line passing through the center of circle No. 1 and center No. 2, which is recorded as the reference straight line; A plane perpendicular to the horizontal plane is made through the reference line and is called the reference plane. Reference Figure 4 , draw a horizontal line on the water surface of the test pool, make the horizontal line parallel to the reference line and lie in the reference plane, and record the horizontal line as the reference line; The two sides of the reference plane are respectively recorded as the first side and the second side, and the direction from the first side horizontally pointing to the second side is recorded as the first direction, and the direction from the second side horizontally pointing to the first side is recorded as the second direction; The water surface of the test pool is divided into two areas using a reference line, wherein the area on the first side of the reference plane is recorded as the first area, and the area on the second side of the reference plane is recorded as the second area.

[0042] The step of adjusting the position of the tire to be tested with gas leakage also includes: Perform a type of position adjustment on a type of flat tire, including: Select one flat tire of the first category each time to adjust its position until all flat tires of the first category have undergone one-category position adjustment; Recording a currently selected type of flat tire as a designated tire; Obtain a type of matching verification bit corresponding to the specified tire, recorded as the specified verification bit of the specified tire; Control the designated tire to rotate in a first direction, and when the position of the designated verification position changes, control the designated tire to stop rotating, and obtain the position change of the designated verification position; If the position change of the designated verification position is: moving from the original position to the first direction, then obtaining the position of the designated verification position after the designated tire stops rotating, and executing the designated verification position adjustment strategy; If the position change of the designated verification position is: moving from the original position to the second direction, the designated tire is controlled to rotate in the first direction, and the position change of the designated verification position is monitored during the rotation process. When the position change of the designated verification position is detected to be converted to moving in the first direction, the designated tire is controlled to stop rotating, and the position of the designated verification position after the designated tire stops rotating is obtained, and the designated verification position adjustment strategy is executed; by controlling the rotation of the tire and combining the real-time monitoring of the bubble position change, the leakage position of a type of leaking tire is accurately judged and adjusted, which significantly improves the adjustment efficiency and accuracy. In operation, by selecting a type of leaking tire one by one, the complexity brought by the simultaneous adjustment of multiple tires is avoided, and the focus and accuracy of each adjustment are ensured. The core strategy is to judge the distribution of the leakage position based on the relationship between the change direction of the bubble position and the rotation direction of the tire. If the bubble position change is the same as the rotation direction, it indicates that the leakage position is located in the upper half of the tire. At this time, no complex adjustment is required. The correction can be completed by controlling the tire rotation to align the bubble position with the baseline. If the change in the bubble position is opposite to the direction of rotation, it means that the leak is in the lower half of the tire. To ensure the convenience and consistency of subsequent adjustment operations, it is necessary to first adjust the leak to the upper half by rotating the tire, and then align the bubble position with the baseline. This step-by-step adjustment method combines the advantages of real-time monitoring and dynamic correction. Through precise judgment and a reasonable adjustment sequence, it simplifies the operation steps to the greatest extent, avoids unnecessary complex adjustments, and improves overall efficiency. At the same time, during the adjustment process, the solution fully considers the impact of the spatial distribution of the leak position on the convenience of operation. By uniformly adjusting the leak point to the upper half, it not only provides a clearer adjustment benchmark for subsequent operations, but also significantly reduces the errors that may occur during the adjustment process.

[0043] The obtaining of the position of the designated verification position after the designated tire stops rotating, and executing the designated verification position adjustment strategy, are specifically: If the designated verification position is in the first area after the designated tire stops rotating, the designated tire is controlled to rotate in the first direction. When the designated verification position coincides with the reference line, the designated tire is controlled to stop rotating, thereby completing a type of position adjustment of the current designated tire. If the designated verification position is in the second area after the designated tire stops rotating, the designated tire is controlled to rotate in the second direction. When the designated verification position coincides with the reference line, the designated tire is controlled to stop rotating, and a type of position adjustment of the current designated tire is completed. This technical solution provides an efficient and accurate positioning and adjustment method for tires with gas leakage by introducing a geometric reference system and a dynamic adjustment strategy. First, the solution divides the water surface of the test pool into clear geometric areas by constructing reference lines, reference planes and reference lines, providing a stable spatial reference frame for subsequent operations. The establishment of this geometric system makes the description and adjustment of the tire position more intuitive and standardized, ensuring that the adjustment process is highly consistent and scientific. During the operation, by monitoring the position changes of the designated verification position, the solution adopts a dynamic adjustment strategy to flexibly control the rotation direction and stop position of the tire according to the different conditions of the area where the verification position is located, thereby achieving accurate correction of the tire leakage point. This combination of real-time monitoring and precise control significantly improves the accuracy of adjustment and avoids errors that may be caused by human judgment. At the same time, the step-by-step adjustment operation mode selects the flat tires one by one for position correction, which not only reduces the complexity of adjusting multiple tires at the same time, but also makes it easier for operators to observe the effect of each adjustment in detail, effectively improving the efficiency of problem solving. At the same time, this method adjusts the position of a type of flat tire so that the flat position of a type of flat tire on the inspection rack remains in a straight line, which facilitates the subsequent manual accurate determination of the flat position and further improves the detection efficiency.

[0044] The step of adjusting the position of the tire to be tested with gas leakage also includes: Perform a second type of position adjustment on a second type of flat tire, specifically: Select one of the second-category flat tires for position adjustment each time until all the second-category flat tires have undergone a second-category position adjustment; Recording a currently selected type of flat tire as a selected tire; Obtain all second-class matching verification bits corresponding to the selected tire, and record them as the selected verification bits of the selected tire; Control the selected tire to rotate one circle, and monitor the position change of each selected verification position during the rotation; If during the selection of the tire rotation, it is detected that each selection verification position moves in the first direction at the same time, then the selection verification position adjustment strategy is executed; If during the entire process of the selected tire rotating, there is a selected verification position that moves in the opposite direction to the other selected verification positions, the selected tire will be marked as a key tire and a manual comprehensive inspection will be performed on the key tire; The selection verification bit adjustment strategy includes: Control the selected tire to rotate in a first direction, and when it is detected that each selected verification position moves in the first direction at the same time, control the selected tire to stop rotating; Traverse each selection verification bit in turn in the first direction, and obtain the first selection verification bit and the last selection verification bit traversed, which are recorded as the first verification bit and the last verification bit respectively; Draw a horizontal straight line through the first verification position and make it perpendicular to the No. 1 circular surface of the selected tire. Record this horizontal straight line as the first straight line; Get the vertical distance between the last verification digit and the first straight line, and record it as the first-to-last distance; With the first verification position as the endpoint, draw a ray perpendicular to the first straight line and in the same horizontal plane as the first straight line, and record it as the reference ray; Select a point on the reference ray so that the distance between the point and the first straight line is equal to half of the distance between the first and last lines, and record the point as the reference point; Get the location of the reference point; If the reference point is in the first area, the selected tire is controlled to rotate in the first direction. When the reference point coincides with the reference line, the selected tire is controlled to stop rotating, thereby completing the second type of position adjustment of the currently selected tire. If the reference point is in the second area, the selected tire is controlled to rotate in the second direction. When the reference point coincides with the reference line, the selected tire is controlled to stop rotating, and the second-class position adjustment of the currently selected tire is completed. By selecting a second-class leaking tire each time, the movement direction of its multiple selected verification positions during the rotation process is monitored. If it is found that all leaking points can move synchronously in the first direction, it indicates that the leaking points are distributed in the same half of the tire, and the processing process can be simplified by further adjustment; if there is a situation where the movement direction of the leaking point is opposite to that of other leaking points, it indicates that the leaking points are distributed in different halves of the tire. The tire is marked as a key tire and transferred to a manual comprehensive inspection to ensure the integrity and accuracy of the inspection. This step-by-step judgment and screening mechanism effectively avoids the risk of missed detection and misjudgment. When synchronous adjustment is possible, the solution obtains the first verification position and the last verification position and their midpoint positions, and combines precise geometric calculations to adjust the midpoint to the reference line position. This adjustment method uses the coincidence relationship between the reference point and the reference line to ensure the symmetry and reasonable distribution of the leaking point, while simplifying the subsequent manual precise positioning of the leaking point. In addition, the solution's dynamic calculation and rotation control of reference points further optimizes the adjustment process logic and achieves the highest accuracy with the least operations.

[0045] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0046] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for detecting gas leakage, characterized in that: include: For each tire to be tested: Obtain two circular surfaces surrounded by the edge contour of the tire to be tested, which are respectively recorded as the first circular surface and the second circular surface of the tire to be tested; Obtain the centers of the first and second circular surfaces respectively, and record them as the first and second circular centers respectively; Select N tires to be tested and install them on the test bracket so that the first and second centers of each tire to be tested are passed through by the test bracket; The test bracket is a straight rod; A test stand equipped with N tires to be tested is recorded as a test set stand; Control the test frame to be in a vertical state so that the No. 1 circular surface of the tire to be tested on the test frame remains horizontal; Transfer the vertical inspection assembly rack to the top of the test pool; Control the inspection group frame to vibrate in the horizontal direction and move vertically downward; When all the tires to be tested on the inspection assembly frame are immersed in the water in the test tank, the inspection assembly frame is controlled to stop moving, and the inspection assembly frame is controlled to stop vibrating; Observe the water surface in the test pool to check whether bubbles continue to appear; If no continuous bubbles are detected, it is determined that there is no gas leakage in the tires to be tested on the inspection rack; If continuous bubbles are detected, the tire under test with gas leakage is marked; Adjust the position of the tire to be tested that has air leakage.

2. A method for detecting gas leakage according to claim 1, characterized in that: The detection of whether bubbles continue to appear includes: S1. Set the duration for defining the continuous appearance of bubbles, which is recorded as the duration limit; S2. Setting a time interval for determining whether bubbles continue to appear, recorded as the continuous interval; S3. When bubbles are observed to appear on the water surface of the test pool, the location where the bubbles appear is marked as the bubble position; S4, for each bubble position, start timing from when a bubble appears at the bubble position; S5. When a bubble is observed again at the bubble position within the continuous interval, the timing continues; S6. When no bubble is observed to appear again at the bubble position within the continuous interval, the timing is stopped; S7. When the time duration of a certain bubble position is ≥ the duration limit, it is determined that the continuous appearance of bubbles is detected; S8. When the time duration of all bubble positions is less than the duration limit, it is deemed that no continuous bubbles are detected.

3. A method for detecting gas leakage according to claim 1, characterized in that: If bubbles are detected to continue to appear, marking the tire to be tested as having gas leakage includes: Obtain the center point of the test bracket and record it as the bracket center point; Control the inspection assembly frame to rotate 90 degrees around the center point of the bracket so that the No. 1 circular surface of the tire to be tested on the inspection assembly frame is perpendicular to the horizontal plane; Observe the water surface in the test pool; Execute steps S1-S8 to obtain the bubble position where bubbles continue to appear, and mark the bubble position as a position to be verified; Mark the suspected tire according to each position to be verified; Perform primary screening and rotary screening on suspected tires, and mark the tires to be tested that have gas leaks.

4. A method for detecting gas leakage according to claim 3, characterized in that: The method of marking a suspected tire according to each position to be verified includes: Take any one of the two ends of the inspection frame as the marking end; Make a plane through the marked end parallel to the No. 1 circular surface of the tire to be tested on the inspection rack, and record it as the end surface; Distance division is performed on each bit to be verified, specifically: Obtain the length of the test stand and divide it by N. The result is taken as the length of each tire to be tested on the test stand, recorded as the single tire length; Take half of the single fetus length as half fetus length; Obtain the vertical distance between the position to be verified and the end face, and record it as the end position distance of the position to be verified; Calculate the end distance plus half the fetal length, and record the result as the distal distance of the position to be verified; Calculate the end distance minus half the fetal length and record the result as the proximal distance of the position to be verified; The near-end distance and the far-end distance form a closed interval, where the near-end distance is the left endpoint of the interval and the far-end distance is the right endpoint of the interval, and the interval is recorded as the verification interval of the position to be verified; For each tire to be tested on the inspection rack, the tire interval acquisition strategy is executed.

5. A method for detecting gas leakage according to claim 4, characterized in that: The tire interval acquisition strategy is executed for each tire to be tested on the inspection rack, specifically: Obtain the first and second center points of the tire to be tested; Obtain the vertical distances between the center of the first circle and the center of the second circle and the end face, respectively, and record them as the center distance of the first circle and the center distance of the second circle; Compare the center distance of circle 1 with the center distance of circle 2, take the smaller one as the proximal center distance, and the larger one as the distal center distance; The proximal end center distance and the distal end center distance form a closed interval, wherein the proximal end center distance is used as the left end point of the interval and the distal end center distance is used as the right end point of the interval, and the interval is recorded as the tire interval of the tire to be tested; Compare each tire interval with the verification interval, select tire intervals that have intersections with the verification interval, and mark them as marked intervals; The tire to be tested corresponding to each marked interval is obtained respectively, and marked as a suspected tire.

6. A method for detecting gas leakage according to claim 3, characterized in that: The primary screening and rotary screening of suspected tires and marking tires to be tested with gas leakage include: The primary screening is specifically: Obtain the position of each suspected tire on the inspection rack respectively; If the two adjacent tires to be tested of a suspected tire are not suspected tires, the suspected tire is marked as a tire to be tested with gas leakage, and the suspected tire is deleted; The remaining suspected tires are subjected to rotational screening.

7. A method for detecting gas leakage according to claim 6, characterized in that: The remaining suspected tires are subjected to rotary screening, specifically: Among all the remaining suspected tires, one suspected tire is selected each time to execute the rotation screening strategy until all the remaining suspected tires are selected once; Record the currently selected suspected tire as the selected tire; Control the selected tire to rotate around the inspection assembly frame and observe the changes in the position of the bubbles on the water surface of the test pool, specifically: Before the tire is controlled to rotate around the inspection assembly frame, the position of the position to be verified on the water surface of the test pool is recorded as the initial position; Control the selected tire to rotate four times, each time rotating 90 degrees; After the tire is rotated 90 degrees each time, steps S1 to S8 are executed to obtain the bubble position where bubbles continue to appear, and the bubble position is recorded as the rotation change position; Compare the rotational changes obtained by four rotations with the initial position; If there is a rotation change position after a certain rotation that is different from the initial position, the currently selected tire is marked as a tire to be tested with gas leakage, and the tire to be tested is marked as a type of leaking tire, and the position to be verified that has changed is marked as a type of matching verification position of the type of leaking tire; If two or more rotational change positions after a certain rotation are different from the initial positions, the currently selected tire is marked as a tire to be tested with gas leakage, and the tire to be tested is marked as a second-class leaking tire, and all positions to be verified that have changed positions are marked as second-class matching verification positions of the second-class leaking tire; If each rotation change position after four rotations is the same as the initial position, the currently selected tire is deleted from the suspected tires.

8. A method for detecting gas leakage according to claim 7, characterized in that: The step of adjusting the position of the tire to be tested with gas leakage comprises: Obtain the center of circle No. 1 and the center of circle No. 2 of any specified tire, and draw a straight line passing through the center of circle No. 1 and the center of circle No. 2, which is recorded as the reference straight line; A plane perpendicular to the horizontal plane is made through the reference line and is called the reference plane. Draw a horizontal line on the water surface of the test pool so that the horizontal line is parallel to the reference line and lies within the reference plane, and record the horizontal line as the reference line; The two sides of the reference plane are respectively recorded as the first side and the second side, and the direction from the first side horizontally pointing to the second side is recorded as the first direction, and the direction from the second side horizontally pointing to the first side is recorded as the second direction; The water surface of the test pool is divided into two areas using a reference line, wherein the area on the first side of the reference plane is recorded as the first area, and the area on the second side of the reference plane is recorded as the second area.

9. A method for detecting gas leakage according to claim 8, characterized in that: The step of adjusting the position of the tire to be tested with gas leakage also includes: Perform a type of position adjustment on a type of flat tire, including: Select one flat tire of the first category each time to adjust its position until all flat tires of the first category have undergone one-category position adjustment; Recording a currently selected type of flat tire as a designated tire; Obtain a type of matching verification bit corresponding to the specified tire, recorded as the specified verification bit of the specified tire; Control the designated tire to rotate in a first direction, and when the position of the designated verification position changes, control the designated tire to stop rotating, and obtain the position change of the designated verification position; If the position change of the designated verification position is: moving from the original position to the first direction, then obtaining the position of the designated verification position after the designated tire stops rotating, and executing the designated verification position adjustment strategy; If the position change of the designated verification position is: moving from the original position to the second direction, the designated tire is controlled to rotate in the first direction, and the position change of the designated verification position is monitored during the rotation process. When the position change of the designated verification position is detected to be converted into moving in the first direction, the designated tire is controlled to stop rotating, and the position of the designated verification position after the designated tire stops rotating is obtained, and the designated verification position adjustment strategy is executed; The obtaining of the position of the designated verification position after the designated tire stops rotating, and executing the designated verification position adjustment strategy, are specifically: If the designated verification position is in the first area after the designated tire stops rotating, the designated tire is controlled to rotate in the first direction. When the designated verification position coincides with the reference line, the designated tire is controlled to stop rotating, thereby completing a type of position adjustment of the current designated tire. If the designated verification position is in the second area after the designated tire stops rotating, the designated tire is controlled to rotate in the second direction. When the designated verification position coincides with the reference line, the designated tire is controlled to stop rotating, thereby completing a type of position adjustment of the current designated tire.

10. A method for detecting gas leakage according to claim 8, characterized in that: The step of adjusting the position of the tire to be tested with gas leakage also includes: Perform a second type of position adjustment on a second type of flat tire, specifically: Select one of the second-category flat tires for position adjustment each time until all the second-category flat tires have undergone a second-category position adjustment; Recording a currently selected type of flat tire as a selected tire; Obtain all second-class matching verification bits corresponding to the selected tire, and record them as the selected verification bits of the selected tire; Control the selected tire to rotate one circle, and monitor the position change of each selected verification position during the rotation; If during the selection of the tire rotation, it is detected that each selection verification position moves in the first direction at the same time, then the selection verification position adjustment strategy is executed; If during the entire process of the selected tire rotating, there is a selected verification position that moves in the opposite direction to the other selected verification positions, the selected tire will be marked as a key tire and a manual comprehensive inspection will be performed on the key tire; The selection verification bit adjustment strategy includes: Control the selected tire to rotate in a first direction, and when it is detected that each selected verification position moves in the first direction at the same time, control the selected tire to stop rotating; Traverse each selection verification bit in turn in the first direction, and obtain the first selection verification bit and the last selection verification bit traversed, which are recorded as the first verification bit and the last verification bit respectively; Draw a horizontal straight line through the first verification position and make it perpendicular to the No. 1 circular surface of the selected tire. Record this horizontal straight line as the first straight line; Get the vertical distance between the last verification digit and the first straight line, and record it as the first-to-last distance; With the first verification position as the endpoint, draw a ray perpendicular to the first straight line and in the same horizontal plane as the first straight line, and record it as the reference ray; Select a point on the reference ray so that the distance between the point and the first straight line is equal to half of the distance between the first and last lines, and record the point as the reference point; Get the location of the reference point; If the reference point is in the first area, the selected tire is controlled to rotate in the first direction. When the reference point coincides with the reference line, the selected tire is controlled to stop rotating, thereby completing the second type of position adjustment of the currently selected tire. If the reference point is in the second area, the selected tire is controlled to rotate in the second direction. When the reference point coincides with the reference line, the selected tire is controlled to stop rotating, thereby completing the second type of position adjustment of the currently selected tire.

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