Intelligent detection system and detection method for fatigue resistance and air tightness of upper shell of gas meter

Abstract

The invention provides an intelligent detection system and detection method for fatigue resistance and air tightness of an upper shell of a gas meter, and solves the problems of dispersed quality detection, low efficiency and insufficient accuracy of the upper shell of the gas meter in the prior art. According to the system, an anti-fatigue strength test unit and an air tightness detection unit are connected in series and share a test station, so that continuous automatic detection of two key performance indexes of the upper shell of the gas meter is realized. According to the first test unit, an elastic net bag structure is matched with an image acquisition and analysis system, and accurate calculation of deformation and generation of a distribution diagram are realized through grid mark amplification and visualized tiny deformation. And the second test unit combines a negative pressure water immersion method with a specially-made water vapor rotary collection structure, and accurately measures the content of collected water vapor through a humidity detection mechanism to obtain an accurate air tightness evaluation result. The whole system is coordinated and managed by a unified control system, and full automation and data sharing of a test process are realized.

Description

Technical Field

[0001] The present invention relates to the field of gas meter detection, and in particular to an intelligent detection system and method for fatigue strength and air tightness of a gas meter upper shell. Background Art

[0002] Gas meters are key devices for measuring gas usage, and their quality and performance are directly related to metering accuracy and operational safety. With the increasing popularity of gas applications, quality requirements for gas meters are continuously increasing. The fatigue strength and airtightness of the gas meter housing are key indicators for evaluating gas meter quality. Currently, gas meter housing inspections typically utilize various single-function testing methods. For example, airtightness testing typically utilizes the water immersion bubble observation method, where the operator immerses the gas meter housing in water and observes for bubbles to determine sealing performance. Fatigue strength testing often utilizes a simple static pressure test using a pressurized device. These traditional testing methods have significant drawbacks. Firstly, the testing process is highly dependent on manual operation and subjective judgment, making it difficult to ensure the accuracy and consistency of test results. Secondly, different performance indicators require different testing equipment, making the testing process cumbersome and inefficient. Furthermore, equipment conversions can damage the test piece, impacting the reliability of the test results.

[0003] In the prior art, there have been some attempts to conduct multifunctional testing of gas meters. For example, patent document CN116990152 A discloses a multifunctional testing device for gas meters, which includes a base and a positioning frame fixed to the base. The base is equipped with a positioning assembly for positioning the gas meter, and the positioning frame is provided with a bending moment testing mechanism, a torque testing mechanism, and a compressive strength testing mechanism that are compatible with the positioning assembly. By setting up different testing mechanisms, the device can perform multiple tests on the gas meter, such as bending moment, torque, and compressive strength, to a certain extent improving the detection efficiency. However, the device is mainly aimed at the mechanical strength test of the entire gas meter, and does not specifically optimize the fatigue strength and air tightness of the gas meter upper shell. In particular, it lacks precise measurement of small deformations and automated detection means for air tightness. In addition, although the various testing mechanisms of the device are integrated together, the testing process still requires manual intervention and judgment, and fails to achieve true automated continuous testing, making it difficult to meet the high requirements for detection efficiency and accuracy in mass production.

[0004] Therefore, the design and development of an intelligent system capable of automated, continuous, and comprehensive testing of gas meter upper casings is crucial for improving gas meter product quality and safety. In particular, an integrated system is needed that can organically combine fatigue strength testing and airtightness testing, automatically switching between them. This system can improve testing efficiency while ensuring the accuracy and reliability of test results. Summary of the Invention

[0005] The purpose of the present invention is to provide an intelligent detection system and method for the fatigue strength and air tightness of the upper shell of a gas meter, so as to solve the technical problems of low efficiency, poor accuracy and insufficient automation in the quality detection of the upper shell of a gas meter in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solutions: A gas meter upper shell fatigue strength and air tightness intelligent detection system is used for automatic continuous detection of the gas meter upper shell, comprising: a first test unit for fatigue strength testing and a second test unit for air tightness testing. The two test units are arranged in series and share a test station, and can perform continuous double detection on the same gas meter upper shell.

[0007] The first test unit includes: an installation assembly frame, the installation assembly frame includes an upper and lower part, which are vertically connected by multiple connecting columns to form a support frame; a test installation station provided at the lower part of the installation assembly frame, the test installation station is used to position and fix the upper shell of the gas meter, and the test installation station is provided with a positioning structure for forming a match with the open end of the upper shell of the gas meter; a clamping mechanism installed on the upper part of the installation assembly frame, the clamping mechanism includes a driving structure and a tooling pressure plate, the driving structure drives the tooling pressure plate to form a sealed match with the open end of the upper shell of the gas meter, the tooling pressure plate includes an inserting part and a sealing part, the inserting part is provided with a yield structure, the sealing part is provided with a sealing structure, and the tooling pressure plate is provided with a through hole for connecting to the interior of the upper shell of the gas meter; an air pressure control system connected to the installation assembly frame, The air pressure control system includes a gas blowing and suction device, which is connected to the gas connection port on the upper shell of the gas meter and is used to inject test gas into the interior of the upper shell of the gas meter and implement a pressure test; an elastic net bag connected to the lower surface of the work station mounting plate, the elastic net bag forms a semi-enclosed structure directly below the test mounting station, the upper end of the elastic net bag has a widened amplification plate connected to the lower end of the work station mounting plate, and the surface of the elastic net bag is pre-printed with high-precision geometric patterns or grid marks for visualizing and amplifying tiny deformations of the upper shell of the gas meter; an image acquisition and analysis system, which includes a high-definition camera and image processing software for capturing and analyzing the state changes of the elastic net bag in real time, calculating the actual deformation of the upper shell of the gas meter and generating a deformation distribution map.

[0008] The second test unit includes: a frame, which is arranged corresponding to the bottom of the installation assembly frame of the first test unit and forms a stable connection; a water tank body, which is arranged on the frame and located below the first test unit, and is used to accommodate the upper shell of the gas meter after the fatigue strength test, and the upper end opening of the water tank body is connected to the outside world; a pushing structure installed at the lower end of the water tank body, and the pushing structure adopts a double-cylinder symmetrical arrangement design, which is used to control the vertical and smooth movement of the water tank body, so that the water tank body rises to a position where it can immerse the upper shell of the gas meter; a negative pressure control system, which is shared with the air pressure control system of the first test unit, realizes function conversion by switching valves, and is used to apply negative pressure to the inner cavity of the upper shell of the gas meter immersed in water, so that external moisture is immersed in the negative pressure. The water vapor is sucked into the leakage point inside the upper shell of the gas meter; a humidity detection mechanism, which is installed on the upper end of the tooling pressure plate of the first test unit, including a mounting shell, a lifting assembly, a rotation drive assembly and a water vapor rotation collection structure. The humidity detection mechanism is connected to the interior of the upper shell of the gas meter through the movable through-hole on the tooling pressure plate, and is used to detect the humidity changes inside the upper shell of the gas meter and determine whether the air tightness is qualified; a control system, which is used to unify and coordinate the work processes of the first test unit and the second test unit to realize automatic switching and data sharing between the two test units. The control system includes a processor, a memory and an interactive interface, which can automatically execute the complete process of fatigue strength test and air tightness test according to the preset program, and generate a test report.

[0009] Preferably, the tooling pressure plate comprises a press-fit insertion portion and a press-fit sealing portion. The press-fit insertion portion has a clearance notch at the lower corner, the press-fit sealing portion has outwardly protruding sidewalls with a protruding sealing rim, and the tooling pressure plate has a movable through-hole. This compartmentalized design allows the tooling pressure plate to be smoothly inserted into the upper shell and provides a dual seal. The clearance notch prevents jamming during insertion, the protruding sealing rim provides a larger sealing contact area, and the movable through-hole provides a path for the humidity detection mechanism to extend, significantly improving the sealing reliability and operational convenience during the test process.

[0010] Preferably, the elastic net bag has a widened amplification plate at its upper end, which is connected to the lower end of the station mounting plate. High-precision geometric patterns or grid markings are pre-printed on the surface of the elastic net bag. This design significantly enhances the stability of the connection between the elastic net bag and the station mounting plate, preventing loosening or detachment due to tension changes during testing. The geometric patterns or grid markings also provide a precise reference for deformation detection, making it easier to observe and quantify subtle deformations and improving detection accuracy.

[0011] Preferably, the air pressure control system includes a first gas-blowing and suctioning dual-purpose component and a second gas-blowing and suctioning dual-purpose component, each of which is airtightly connected to a first gas connection port and a second gas connection port on the gas meter's upper housing, respectively. This dual-connection design forms a complete air circulation system, enabling precise control of gas flow and pressure changes within the gas meter's upper housing. This avoids the potential for gas accumulation or poor circulation associated with a single-channel design, significantly improving the uniformity and accuracy of pressure testing.

[0012] Preferably, the lifting assembly in the humidity detection mechanism specifically includes a vertically arranged lifting motor, the output shaft of the lifting motor is connected to a belt drive structure, the belt drive structure is connected to a screw structure, and the screw structure converts the rotational motion output by the motor into a linear motion in the vertical direction; the rotary drive assembly specifically includes a rotary motor arranged parallel to the ground, the rotary motor drives the rotary output shaft to rotate; the lower end of the rotary output shaft is fixedly connected to the water vapor rotating collection structure, and drives the water vapor rotating collection structure to collect water vapor through a coaxial rotation method. This transmission structure design realizes the precise motion control of the water vapor collection device. The belt drive reduces the influence of motor vibration on the system, the screw structure ensures the accuracy of linear motion, and the coaxial rotation method ensures the uniformity and comprehensiveness of water vapor collection, effectively improving the accuracy and reliability of air tightness detection.

[0013] Preferably, the water vapor rotating collection structure specifically includes: a disc-shaped connecting cover, the connecting cover is fixedly connected to the lower end of the rotating output shaft, and the rotating output shaft drives the entire water vapor rotating collection structure to rotate; two groups of symmetrically arranged connecting rod hinge assemblies hinged to the inner edge of the connecting cover, the inner edge of the connecting cover has two fixed ears, and the two groups of connecting rod hinge assemblies are symmetrically hinged through the fixed ears, each group of the connecting rod hinge assemblies includes three mutually hinged connecting rods: a first connecting rod, a second connecting rod and a third connecting rod, one end of the first connecting rod is hinged to the center of the bottom of the connecting cover to form a first hinge part, the other end of the first connecting rod is hinged to the second connecting rod to form a second hinge part, one end of the third connecting rod is hinged to the fixed ear to form a third hinge part, and the other end of the third connecting rod is hinged to the second The hinged part is hinged to form a complete motion chain; the water-absorbing part is slidably connected to the connecting rod hinge assembly, and the side wall of the third connecting rod is provided with a slide groove, and the slide groove forms a sliding fit with the sliding plate, and the sliding plate is fixedly connected to the water-absorbing part, so that the water-absorbing part can move adaptively while the connecting rod rotates; the side wall of the water-absorbing part is provided with a plurality of slender water-absorbing strips, which are used to increase the contact area with the inner wall of the upper shell of the gas meter; the elastic part connected between the two water-absorbing parts, the elastic part has rebound properties, and is in a bent and compressed state in the initial state of the system. When the water vapor rotating collection structure is free from the restriction of the movable through hole, the rebound force of the elastic part drives the connecting rod hinge assembly to rotate and unfold; the limit plate connected to the second hinge part, the limit plate is used to limit the maximum rotation angle of the connecting rod hinge assembly to ensure that the water-absorbing part maintains an ideal straight posture in the unfolded state. This multi-link articulated design, combined with elastic rebound and limiting functions, enables the automatic expansion and contraction of the water-absorbing parts. The water-absorbing strips increase the contact area, and the sliding connection enhances adaptability, forming an integrated and adaptive water vapor collection mechanism. This greatly improves the comprehensiveness and accuracy of air tightness testing, and can detect tiny leaks that are difficult to find by conventional methods.

[0014] Preferably, the inner edge of the connecting cover has two fixed ears, and the two groups of connecting rod hinge assemblies are symmetrically hinged through the fixed ears. One end of the first connecting rod is hinged to the center of the bottom of the connecting cover to form a first hinge part, and the other end of the first connecting rod is hinged to the second connecting rod to form a second hinge part. One end of the third connecting rod is hinged to the fixed ear to form a third hinge part, and the other end of the third connecting rod is hinged to the second hinge part. The side wall of the third connecting rod is provided with a sliding groove, and the sliding groove forms a sliding fit with the sliding plate, and the sliding plate is fixedly connected to the water absorbent. This design of multiple hinges and sliding fits forms a smooth and reliable motion mechanism. The three hinges provide precise motion control and stable mechanical transmission, and the sliding fit gives the water absorbent greater freedom of movement, enabling it to better adapt to the shape changes inside the upper shell of the gas meter, significantly improving the efficiency and integrity of water vapor collection.

[0015] The present invention also provides a gas meter upper shell detection method, comprising the following steps: installing and positioning the gas meter upper shell at a test installation station of the gas meter upper shell detection system as described above; performing a fatigue strength test, comprising the following steps: step one, driving the clamping mechanism to move the tooling pressure plate downward and form a sealing fit with the open end of the gas meter upper shell; step two, an air pressure control system injects test gas into the interior of the gas meter upper shell to perform a cyclic pressurization test; step three, an image acquisition and analysis system acquires and analyzes the state of the elastic net bag to determine whether the gas meter upper shell meets the fatigue strength requirements; the gas meter upper shell that has passed the fatigue strength test is immediately placed at the original position to be tested and kept in a clamped state. The air tightness test includes the following steps: step 1, relieving the pressure of the air pressure control system to return the internal pressure of the upper shell of the gas meter to normal pressure; step 2, pushing the structure to control the water tank to move upward, so that the upper shell of the gas meter is immersed in the clean water in the water tank; step 3, the negative pressure control system implements negative pressure extraction on the inside of the upper shell of the gas meter, so that external moisture enters the interior through the leakage point of the upper shell of the gas meter under the action of negative pressure; step 4, starting the lifting component and the rotation drive component, and controlling the water vapor rotation collection structure to collect water vapor inside the upper shell of the gas meter; step 5, the humidity detection mechanism detects the collected water vapor content to determine whether the air tightness of the upper shell of the gas meter is qualified.

[0016] Preferably, the cyclic pressurization test includes the following steps: Step 1, the air pressure control system injects test gas into the sealed gas meter upper shell according to a predetermined program to form an initial test pressure; Step 2, the system sets different pressure cycle modes, including one or more of constant pressure maintenance, step pressure increase, and periodic pressure fluctuation, to comprehensively evaluate the structural response of the gas meter upper shell under various working conditions; Step 3, the elastic net bag undergoes corresponding changes with the slight deformation of the gas meter upper shell, and these changes are magnified and visualized through the grid marks on its surface; Step 4, the image acquisition and analysis system collects the state of the elastic net bag and compares it with the initial state, calculates the actual deformation of the gas meter upper shell at various parts, and generates a deformation distribution map. This multi-mode cyclic pressurization method comprehensively simulates various pressure environments that the gas meter may face in actual use. By fully recording and analyzing the deformation process, it can more accurately evaluate the long-term performance and potential risk points of the gas meter upper shell, significantly improving the scientificity and predictiveness of fatigue strength testing.

[0017] Preferably, the water vapor collection includes the following steps: Step 1, start the lifting assembly to control the water vapor rotating collection structure to move downward until the connecting rod hinge assembly is completely free from the restriction of the movable through hole; Step 2, the rebound force of the elastic part drives the connecting rod hinge assembly and the water absorbing part connected thereto to expand to both sides, so that the water absorbing part and the water absorbing strip are in close contact with the inner wall of the upper shell of the gas meter; Step 3, the rotation drive assembly is started to drive the entire water vapor rotating collection structure to rotate in all directions inside the upper shell of the gas meter, and the water absorbing part performs a complete scan along the inner walls and bottom of the upper shell of the gas meter to achieve comprehensive collection of water vapor; Step 4, when the water vapor rotating collection structure moves down to the bottom of the upper shell of the gas meter, the system controls the rotation drive assembly to rotate multiple times to ensure that the water vapor that may accumulate at the bottom is fully absorbed by the water absorbing part and the water absorbing strip; Step 5, the lifting assembly controls the water vapor rotating collection structure to move upward, so that it gradually retracts into the inside of the movable through hole, and the detection assembly accurately measures the moisture content adsorbed by the water vapor rotating collection structure to obtain the actual humidity value inside the upper shell of the gas meter. This three-dimensional water vapor collection method combines multiple motion modes such as vertical movement, expansion and contraction, and rotational scanning to ensure that all areas inside the gas meter upper shell are effectively covered. It especially strengthens the detection of water accumulation areas at the bottom, and replaces traditional visual inspection with quantitative humidity analysis, significantly improving the accuracy, sensitivity and repeatability of air tightness detection.

[0018] The intelligent detection system and method for fatigue strength and airtightness of gas meter upper shells provided by the present invention realizes the automation, intelligence and efficiency of gas meter upper shell quality detection through innovative structural design and scientific testing process, and has the following significant beneficial effects: 1. By connecting the fatigue strength test unit and the air tightness test unit in series and sharing the test station, continuous and automated testing of the two key performance indicators of the gas meter upper shell is achieved, significantly improving testing efficiency and reducing production costs.

[0019] 2. The control system realizes comprehensive intelligent management of the testing process. By unifying and coordinating the workflows of the two test units, it automatically executes the complete test procedure and generates test reports, greatly improving the accuracy and consistency of detection.

[0020] 3. The application of elastic mesh bags provides an intuitive and reliable data basis for fatigue strength testing. By amplifying and visualizing small deformations through grid marking, and cooperating with the image acquisition and analysis system, accurate calculation of deformation variables and generation of distribution maps are achieved.

[0021] 4. The air tightness test adopts an advanced method that combines negative pressure water immersion with humidity detection, which overcomes the subjectivity and uncertainty of the traditional bubble observation method and improves the sensitivity and reliability of the test through quantitative humidity analysis.

[0022] 5. The multi-link articulated design and automatic deployment mechanism of the water vapor rotating collection structure, combined with omnidirectional rotation scanning, enable comprehensive inspection of all areas inside the gas meter upper shell, and can detect tiny leaks that are difficult to detect with conventional methods.

[0023] In summary, the present invention provides a new technical means for gas meter product quality control, which has significant practical value and promotion and application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of the upper shell of the gas meter in the present invention; Figure 2 It is a structural schematic diagram of the present invention; Figure 3 Schematic diagram of the structure of the anti-fatigue testing device of the present invention; Figure 4 This is a structural schematic diagram of the test installation station of the present invention when the gas meter upper shell is not installed; Figure 5 This is a schematic diagram of part of the internal structure of the upper shell of the present invention when it is sealed and installed in the test installation station; Figure 6 for Figure 5 A partial enlarged view of point Ⅰ in the middle; Figure 7 Schematic diagram of the internal structure of the humidity detection mechanism of the present invention; Figure 8 This is a schematic diagram of the internal structure of the water vapor rotating collection structure of the present invention when it is stored; Figure 9This is a schematic diagram of the structure of the water vapor rotating collection structure of the present invention during the deployment process; Figure 10 This is a schematic diagram of the composition of two test units of the present invention; Figure 11 Schematic diagram of the detection process of the present invention.

[0025] : Reference numerals: gas meter upper shell 00, first test unit 01, second test unit 02, frame 03, open end 001, protruding mounting edge 002, protruding piece 003, first gas connection port 004, second gas connection port 005, installation assembly frame 10, test installation station 20, pressing mechanism 30, air pressure control system 40, elastic net bag 50, pressing mounting plate 11, sliding connecting column 12, station mounting plate 13, connecting frame 14, abutting positioning groove 21, driving pressurizing structure 31, tooling pressing plate 32, first gas blowing and sucking dual-purpose part 41, second gas blowing and sucking dual-purpose part 42, amplification plate 51, driving cylinder 311, connection transmission component 312, press-fitting insert 321, press-fitting sealing part 322, movable through hole 323, central connecting column 3121, Connecting plate 3122, connecting rod 3123, making way for insertion notch 3211, protruding sealing edge 3221, water storage box 60, pushing structure 70, humidity detection mechanism 80, mounting shell 81, lifting assembly 82, rotation drive assembly 83, water vapor rotation collection structure 84, lifting motor 821, belt drive structure 822, screw structure 823, rotating motor 831, rotating output shaft 832, connecting cover 841, connecting rod hinge assembly 842, water absorbing part 843, elastic part 844, fixed ear 845, water absorbing strip 846, slide groove 847, sliding plate 848, limit plate 849, first connecting rod 8421, second connecting rod 8422, third connecting rod 8423, first hinge part 851, second hinge part 852, third hinge part 853. DETAILED DESCRIPTION

[0026] Example 1: Reference Figure 1The test object in this embodiment is the gas meter upper housing 00, which is generally rectangular and has an open end 001. The rectangular edge of the open end 001 is protruding and forms a protruding mounting edge 002. The upper end of the protruding mounting edge 002 is provided with multiple strip-shaped protruding tabs 003 to ensure a stable and sealed connection with the other half of the gas meter housing. The gas meter upper housing 00 also has a first gas connection port 004 and a second gas connection port 005 for gas circulation. It should be noted that the term "gas meter upper housing" here refers to the upper and lower structural arrangement in traditional gas meter housing designs, where the upper housing generally refers to the housing assembly installed in the upper position. With the continuous evolution and improvement of gas meter structural design, modern gas meter housing structures have evolved into various forms. Some employ a front and rear housing layout, no longer strictly distinguishing between upper and lower positions. However, in production, testing, and technical literature, the industry still uses the traditional terms "upper housing" and "lower housing" to distinguish different housing components, which have become common industry terminology. Therefore, the term "gas meter upper case" as used in this disclosure is based on common industry practice and refers to a key component of the gas meter housing, regardless of its actual installation location within the entire device. The intelligent fatigue strength and airtightness testing system and method for gas meter upper cases provided by this disclosure can perform comprehensive performance testing of the gas meter upper case, continuously and automatically testing everything from fatigue strength to airtightness, effectively ensuring the safety and long-term stability of the gas meter.

[0027] refer to Figure 2-Figure 6The intelligent testing system for fatigue strength and airtightness of the gas meter upper shell is an integrated automatic testing system that can complete quality inspections before gas meter assembly, thereby improving production efficiency and reducing costs. The system includes a frame 03, a first test unit 01, and a second test unit 02, both mounted on the frame 03. The first test unit 01 is primarily used for fatigue strength testing, simulating the actual operating environment of a gas meter and evaluating its structural strength. It primarily consists of an installation assembly 10, a test installation station 20, a clamping mechanism 30, an air pressure control system 40, an elastic net bag 50, and an image acquisition and analysis system (the image acquisition and analysis system is not shown in the figure). The second test unit 02 is primarily used for airtightness testing, evaluating the airtightness of the gas meter upper shell through negative pressure water immersion and a humidity detection mechanism. In terms of spatial position, the installation assembly 10 is the supporting frame of the entire structure. The upper clamping mounting plate 11 and the lower station mounting plate 13 are vertically connected by four sliding connecting columns 12; the test installation station 20 is embedded in the center of the station mounting plate 13; the clamping mechanism 30 is installed on the upper part of the installation assembly 10, forming a corresponding relationship with the test installation station 20 vertically downward; the air pressure control system 40 is fixed to the side of the station mounting plate 13 through the connecting frame 14; the elastic net bag 50 is connected to the lower surface of the station mounting plate 13, and forms a semi-enclosed structure directly below the test installation station 20; the image acquisition and analysis system is fixed in an appropriate position by a bracket to ensure that the state changes of the elastic net bag 50 can be clearly captured.

[0028] refer to Figure 3-Figure 5 The test installation station 20 is a special device used for the precise positioning and fixation of the gas meter upper shell 00 in this detection system. As a basic component for continuous testing of fatigue strength and airtightness, it is used to firmly place the gas meter upper shell 00 to be tested and ensure the position accuracy during the entire detection process. The station design enables the gas meter upper shell 00 to be placed with the open end 001 facing upward, which is convenient for subsequent compression sealing and double detection operations. Structurally, the test installation station 20 is formed by precisely opening a shape-matching hole groove on the station mounting plate 13. The size and shape of the hole groove are highly consistent with the outer contour of the gas meter upper shell 00, ensuring that the test object can be stably positioned without displacement deviation, providing a reliable position reference for subsequent fatigue strength testing and airtightness testing, and effectively ensuring the accuracy and repeatability of the implementation of the detection method.

[0029] refer to Figure 4-Figure 6The elastic net 50 is the core component of the fatigue strength testing portion of this detection system. As a sensitive deformation detection medium, it amplifies and visualizes the minute deformations of the gas meter upper shell 00 during pressurization, making it a key technical step in the implementation of the detection method. Leveraging its unique material properties, the elastic net 50 transforms the structural deformations of the gas meter upper shell 00 into a more pronounced deformation pattern of the net itself. This "deformation amplification" mechanism makes subtle deformations that would otherwise be difficult to directly observe easier to capture and measure, significantly improving the accuracy and reliability of the fatigue strength assessment of the gas meter upper shell 00 and providing an accurate data foundation for the entire intelligent detection system.

[0030] The elastic net bag 50 is made of a flexible material with a high elastic coefficient. In terms of structural layout, the elastic net bag 50 is fixedly connected to the lower surface of the workstation mounting plate 13 and is designed to fit around and cover the outer surface of the four sides and bottom of the gas meter upper shell 00. This innovative structural design not only serves the fatigue strength test, but also provides effective protection for subsequent airtightness testing. It has multiple functional advantages: first, it provides a uniformly distributed elastic support force for the gas meter upper shell 00, ensuring that the gas meter upper shell 00 is evenly stressed during the test; second, during the installation of the gas meter upper shell 00, the net bag plays a supporting and buffering role, avoiding collision damage caused by operational errors; finally, during the loading and unloading and transfer of the gas meter upper shell 00, the net bag's covering structure can effectively prevent the test piece from accidentally slipping, significantly improving the safety and convenience of the entire testing process, reducing the psychological burden on operators, and improving the operability of the testing method.

[0031] In order to further improve the accuracy and visualization of the fatigue strength test in this intelligent detection system, a precision marking system is used on the surface of the elastic net bag 50, which is pre-printed with high-precision geometric patterns or grid marks. These marks serve as deformation reference datums and can produce corresponding tensile changes when the elastic net bag 50 is deformed by force. By analyzing the deformation patterns of these marks, the detection system can accurately quantify the degree of deformation in different areas and generate deformation distribution maps, providing intuitive data support for the implementation of the detection method. In particular, for areas with large local deformation, the deformation of the marks will be more obvious, thereby helping technicians accurately identify the structural weaknesses of the gas meter upper shell 00 and providing a strong basis for product design optimization. This embodiment uses a diamond grid as the marking system. This grid structure has uniform deformation sensitivity in all directions, can fully reflect the deformation characteristics of the gas meter upper shell 00 in different directions, and helps to achieve the overall technical effect of this detection system and detection method.

[0032] To address the reliability issues associated with the connection between the elastic net bag 50 and the workstation mounting plate 13 and ensure stability and accuracy throughout the testing process, this system design utilizes an amplified connection structure, effectively enhancing the stability of the connection between the two. Specifically, a widened amplification plate 51 is added to the upper end of the elastic net bag 50. This amplification plate 51 significantly increases the contact area with the workstation mounting plate 13. This secure connection to the lower end of the workstation mounting plate 13 ensures that the elastic net bag 50 will not loosen or fall off due to tension changes during the dual fatigue strength and airtightness testing.

[0033] refer to Figure 3 In order to realize the intelligent detection of fatigue strength and air tightness of the upper shell 00 of the gas meter, the air tightness of the test system must be ensured first. To this end, a special clamping mechanism 30 is designed in this detection system as a sealing unit of the entire system, which is used to compress and seal the open end 001 of the upper shell 00 of the gas meter, and is a key link in the implementation of the detection method. The clamping mechanism 30 is installed above the test installation station 20, adopts a vertical downward pressure design, and is equipped with a driving pressurizing structure 31. In the working state, the driving pressurizing structure 31 can drive the tooling pressure plate 32 installed at its lower end to move vertically downward, so that the tooling pressure plate 32 extends into the interior of the upper shell 00 of the gas meter and forms a sealing fit with the open end 001, thereby creating a closed test environment, providing basic conditions for the subsequent dual detection of fatigue strength and air tightness.

[0034] Regarding the technical details of the drive and pressurization structure 31, it utilizes a system design that combines pneumatic drive with mechanical transmission, ensuring precise control of the testing process. The structure comprises a drive cylinder 311 located on the upper layer and its accompanying force transmission system—a connecting and transmission assembly 312. The drive cylinder 311 is fixedly mounted on the compression mounting plate 11, with its piston rod extending downward and connected to the upper end of the connecting and transmission assembly 312. The connecting and transmission assembly 312 slides through four sliding connecting posts 12 via a guide structure, and its lower end connects to the tooling pressure plate 32. From a structural perspective, the connecting and transmission assembly 312 consists of three parts from top to bottom: a central connecting post 3121 directly connected to the cylinder piston rod; a connecting plate 3122 that forms a sliding fit with the four sliding connecting posts 12; and four evenly distributed connecting rods 3123 between the connecting plate 3122 and the tooling pressure plate 32. This multi-point support design ensures uniform pressure transmission, effectively guaranteeing the stability and controllability of the pressurization process during the testing method.

[0035] To simulate the actual operating environment, this intelligent detection system needs to apply a controllable air pressure load to the sealed gas meter upper shell 00. The air pressure control system 40 is designed for this purpose. As the power part of the detection system, it can inject test gas into the test object according to preset pressure parameters and time curves, and is a key link in simulating actual working conditions in the detection method. The system is connected to the workstation mounting plate 13 via a connecting frame 14. Its core actuators include a first gas blowing and suction dual-purpose component 41 and a second gas blowing and suction dual-purpose component 42, which are respectively connected to the first gas connection port 004 and the second gas connection port 005 on the gas meter upper shell 00 to form an air circuit system that can realize gas injection, pressure maintenance and discharge. It not only provides a pressure environment for fatigue strength testing, but also provides a gas control foundation for subsequent air tightness testing.

[0036] To automate and accurately perform intelligent testing of the fatigue strength and airtightness of the gas meter upper shell (00), this system is equipped with an advanced image acquisition and analysis system. As previously mentioned, this system, as a crucial component of the overall testing system, visually captures the deformation of the elastic net bag (50) and automatically determines this deformation through data processing, providing technical support for the scientific implementation of the testing method. The image acquisition and analysis system primarily consists of a high-definition camera (the camera's structure is not shown) and supporting image processing software. The HD camera, mounted in a position to clearly capture the elastic net bag (50), captures images of the net bag (50) in its initial state before testing and in its deformed state after pressurization testing. The system then inputs these two sets of images into the image processing software for comparative analysis. The system calculates the actual deformation of the gas meter upper shell (00) based on the displacement of the grid markers. This is then compared to the system's preset deformation threshold, automatically generating test results and determining whether the gas meter upper shell (00) meets fatigue strength requirements. This image recognition-based testing method eliminates the human error inherent in traditional measurement methods, improving the accuracy and efficiency of the entire testing process, and endowing the present testing system and method with significant technical advantages.

[0037] refer to Figure 4-Figure 6 To ensure reliability and ease of use during testing, this intelligent detection system incorporates specialized design elements for the installation and sealing of the gas meter upper housing (00) during testing. These design elements address two key challenges during implementation: ensuring stable positioning of the gas meter upper housing (00) and ensuring a reliable seal during testing to ensure accurate fatigue strength and airtightness testing.

[0038] The design of the test installation station 20 utilizes a precise alignment principle, with an abutment positioning groove 21 designed along the entire perimeter of its upper end. This structure corresponds to the protruding mounting edge 002 on the open end 001 of the gas meter upper shell 00, allowing the protruding mounting edge 002 to precisely abut against the upper end of the abutment positioning groove 21. This structural coordination ensures the natural positioning and stable installation of the gas meter upper shell 00, ensuring that the test object remains fixed throughout the dual fatigue strength and airtightness testing process, thereby improving the reliability of the test data and the accuracy of the test results.

[0039] The tooling pressure plate 32 is the core component for achieving sealing, and its overall design is highly matched with the size and shape of the open end 001 of the gas meter upper shell 00. The structure of the tooling pressure plate 32 can be divided into two functional parts from bottom to top: a press-fit insert 321 and a press-fit sealing portion 322. The design of the press-fit insert 321 takes into account the smoothness of the insertion process. Notches 3211 are specially designed at the lower corners on both sides of the press-fit insert 321 to allow for insertion. This structure enables the press-fit insert 321 to be smoothly inserted into the gas meter upper shell 00 during the downward movement and press-fitting process of the tooling pressure plate 32. After the insertion is completed, the upper part of the press-fit insert 321 is fitted with the inner walls around the open end 001, forming the first sealing barrier. On this basis, the side walls around the press-fit sealing portion 322 are designed with a protruding sealing edge 3221 protruding outward, which forms a precise correspondence with the protruding installation edge 002 of the gas meter upper shell 00. To enhance the sealing effect, a dedicated sealing rubber gasket is installed at the lower end of the protruding sealing edge 3221 (its structure is not shown in the figure). When the pressure-applying structure 31 is driven to apply pressure, the sealing rubber gasket of the protruding sealing edge 3221 forms a tight fit with the inner wall of the protruding mounting edge 002, forming a second sealing barrier. This ensures a complete seal at the open end 001 of the gas meter upper shell 00, creating the necessary conditions for subsequent fatigue strength testing and airtightness testing, and provides the technical guarantee for the successful implementation of this testing system and method.

[0040] Based on the above structural design, the fatigue strength and airtightness testing method for gas meter upper shells provided by this intelligent testing system uses a comprehensive testing technology that combines cyclic pressure testing and negative pressure water immersion. This testing method fully simulates the various operating conditions experienced by gas meters during actual use. By applying cyclic pressure loads and negative pressure water immersion tests to the gas meter upper shell 00, its long-term fatigue resistance and airtightness performance are comprehensively evaluated, achieving scientific and intelligent quality testing. The specific testing process is as follows: First, a fatigue strength test is performed. The gas meter upper casing 00 to be tested is installed and positioned in the test installation station 20, secured securely in place by abutting the positioning grooves 21. Before testing begins, the system uses an image acquisition and analysis system to record the initial state of the grid markings on the surface of the elastic net bag 50, which serves as reference data for subsequent deformation calculations. The clamping mechanism 30 is then activated, causing the tooling pressure plate 32 to move downward and form a seal with the open end 001 of the gas meter upper casing 00, creating a sealed test chamber.

[0041] Next, the air pressure control system 40 injects test gas into the sealed gas meter upper casing 00 according to a pre-defined program, establishing an initial test pressure. The system can configure various pressure cycling modes, including constant pressure hold, step-by-step pressure increases, and periodic pressure fluctuations, based on the test criteria, to comprehensively evaluate the structural response of the gas meter upper casing 00 under various operating conditions. Throughout the testing process, the elastic net 50 changes in response to the slight deformation of the gas meter upper casing 00. These changes are amplified and visualized through the grid markings on its surface.

[0042] After the fatigue strength test is completed, qualified gas meter upper casings 00 are immediately tested for airtightness, eliminating the need to change test locations, ensuring continuous and efficient testing. The system first depressurizes the air pressure control system 40 to return the internal pressure of the gas meter upper casing 00 to normal. It then activates the second test unit 02, using the negative pressure water immersion method and humidity detection mechanism 80 to accurately assess the airtightness of the gas meter upper casing 00.

[0043] Once all tests are complete, the system automatically generates a comprehensive test report, including deformation distribution diagrams and airtightness test data. This report is then compared against pre-set product quality standards to determine whether the test object meets both fatigue resistance and airtightness requirements. For any unqualified products, the system issues an alarm and records detailed failure information for analysis and improvement by production managers.

[0044] This integrated intelligent detection method not only improves the accuracy and efficiency of detection, but also provides important technical support for the quality control and design optimization of gas meter products, reflecting the innovative value and practicality of this invention in the field of gas meter detection.

[0045] refer to Figure 2The airtightness of the gas meter upper shell 00 is one of the key indicators to ensure the quality and safety of the gas meter product, and is also the core parameter evaluated by this intelligent detection system. After completing the fatigue strength test, some potential defects such as poor interface installation or tiny cracks may appear. Although these defects are not obvious under static conditions, they may cause gas leakage during use. Therefore, this detection system seamlessly integrates the airtightness detection link into the overall detection process and constructs a complete gas meter upper shell quality assessment system, which not only avoids the need for additional airtightness detection steps in the later stage, but also improves the overall detection efficiency. To this end, this system is equipped with a special second test unit 02, which is used to accurately evaluate the airtightness performance of the gas meter upper shell 00, forming a systematic series detection process with the first test unit 01.

[0046] The second test unit 02 utilizes an innovative negative pressure water immersion method for airtightness testing, which is one of the technical features of this testing method. Unlike the conventional positive pressure bubble observation method, this embodiment employs a reverse-engineered testing principle: the test piece is first placed in water. Then, the air inside the sealed test piece is sucked to create a negative pressure. If a leak exists in the shell, the external water will be drawn into the shell. The leak is then determined by monitoring the humidity changes within the test piece. This method is more accurate and easier to automate than the traditional bubble observation method, significantly improving the accuracy and efficiency of testing. The second test unit 02's structural design comprises three main components: a water tank 60 located below the first test unit 01, a propulsion structure 70, and a humidity detection mechanism 80 mounted on the clamping mechanism 30. The water tank 60 is a container for fresh water, with an opening at the top that connects to the outside world, facilitating water level monitoring and refilling. The propulsion structure 70 is mounted at the bottom of the water tank 60 to control its vertical movement. To ensure smooth vertical movement of the water tank 60, this system incorporates a sliding connection between the water tank 60 and the frame 03. This connection is achieved through interlocking slideways and sliders. To enhance propulsion stability and reliability, the propulsion mechanism 70 in this embodiment utilizes a dual-cylinder design. The two symmetrically arranged propulsion cylinders ensure that the water tank 60 does not tilt or wobble during its ascent, providing reliable hardware support for the precise implementation of the airtightness testing method.

[0047] refer to Figure 7-Figure 9The humidity detection mechanism 80 is the core component of the second test unit 02 in this intelligent detection system. It is a key technical link in implementing the airtightness detection method and is used to accurately detect humidity changes inside the gas meter upper shell 00. The mechanism adopts a modular design. Its main body is installed on the upper end of the tooling pressure plate 32. The execution part can extend downward and unfold inside the gas meter upper shell 00 to achieve all-round detection of leak points. The humidity detection mechanism 80 mainly includes four functional parts: the mounting shell 81 serves as a support carrier, and three key functional modules are installed inside: the lifting component 82 that controls vertical movement, the rotary drive component 83 responsible for rotational movement, and the water vapor rotation collection structure 84 that performs water vapor collection. These components are connected in sequence to form a complete motion chain, allowing the water vapor rotation collection structure 84 to penetrate into the gas meter upper shell 00 through the movable through-hole 323 on the tooling pressure plate 32. In order to realize the intelligence and dataization of the detection process, a dedicated detection component (not shown in the figure) is also installed in the installation shell 81, which is responsible for processing and analyzing the collected water vapor data, so as to obtain accurate airtightness assessment results and complete the testing process of the entire intelligent detection system.

[0048] The water vapor rotating collection structure 84 adopts a symmetrical layout design and is the executive component of the air tightness detection method in this detection system. It mainly includes a connecting cover 841 as a basic support component. The inner edge of the connecting cover 841 symmetrically hinges two sets of connecting rod hinge assemblies 842 through two fixed connecting ears 845. These connecting rod hinge assemblies 842 form a sliding connection with the water absorbing part 843 to ensure flexible adaptation during movement. An elastic part 844 with rebound performance is connected between the two water absorbing parts 843 by screws. In the initial state of the system, the connecting rod hinge assembly 842 and the water absorbing part 843 connected thereto are confined inside the movable through hole 323, and the elastic part 844 is in a bent and compressed state. When the rotating water vapor collection structure 84 is moved downward by the control of the lifting assembly 82, freeing it from the confines of the movable through-hole 323, the rebound force of the elastic member 844 causes the entire structure to rotate and expand outward. Conversely, during the upward movement, the inner wall of the movable through-hole 323 acts as a guide, prompting the structure to rotate and contract, forming an adaptive expansion and contraction mechanism. This design enables the rotating water vapor collection structure 84 to collect water vapor from the entire interior of the gas meter upper housing 00, effectively improving the accuracy of airtightness testing and providing technical support for the implementation of this intelligent detection system and method.

[0049] To achieve coordinated coordination between the vertical movement and rotation of the connecting rod hinge assembly 842, this intelligent detection system adopts a three-hinged structure. This structure provides precise motion control and stable mechanical transmission, and is a technical innovation in the water vapor collection process of the airtightness detection method. Specifically, the first hinge 851 is formed by the hinged connection of one end of the first link 8421 of the two-link hinge assembly 842 to the bottom center of the connecting cover 841, serving as the reference point of the entire motion system; the second hinge 852 is formed by the hinged connection of the other end of the first link 8421 to the second link 8422, and is the key node for achieving directional change. The second link 8422 forms a sliding connection with the water absorbent member 843; the third hinge 853 is formed by the hinged connection of one end of the third link 8423 to the fixed link 845, and the other end of the third link 8423 is hinged to the second hinge 852, forming a complete motion chain. Through this multi-hinge design, when the connecting rod hinge assembly 842 moves up and down, the second connecting rod 8422 rotates around the second hinge part 852 under the elastic force of the elastic member 844 or the guiding action of the movable through hole 323, and at the same time drives the third connecting rod 8423 and the first connecting rod 8421 to rotate in coordination, thereby realizing the expansion or contraction process of the water absorbing member 843, forming an efficient water vapor collection system, and enabling the air tightness detection method to be accurately implemented.

[0050] The sliding connection between the third connecting rod 8423 and the water absorbing member 843 is achieved through a specially designed structure, enhancing the flexibility and durability of the detection system. A sliding groove 847 is provided in the sidewall of the third connecting rod 8423, which slides with a sliding plate 848, which is fixedly connected to the water absorbing member 843. This design enables the water absorbing member 843 to adaptively move as the connecting rod hinge assembly 842 rotates, effectively buffering the stress generated by the elastic member 844 during stretching or bending, significantly improving the service life and operational reliability of the rotating water vapor collection structure 84. This structural design ensures full contact with the inner wall of the gas meter upper shell 00 during water vapor collection, ensuring comprehensive and uniform water vapor collection, and providing an accurate data foundation for air tightness testing. This represents a significant technical innovation in the intelligent detection system and method for fatigue strength and air tightness of gas meter upper shells, effectively addressing the problems of blind spots and uneven detection that exist in traditional air tightness testing.

[0051] To ensure the accuracy and reliability of the water vapor rotating collection structure 84, this intelligent detection system incorporates an additional limiting mechanism, providing technical support for the implementation of the airtightness detection method. The limiting plate 849 is an angle control device that precisely limits the maximum rotation angle of the two-link hinge assembly 842, ensuring that the water absorbent element 843 maintains an ideal straight position when deployed, thereby achieving optimal contact. The system is equipped with two limiting plates 849, each connected to the two second hinges 852. When the two second links 8422 drive the water absorbent element 843 to rotate to a horizontal position, the limiting plates 849 prevent the second links 8422 from further outward rotation, preventing structural damage caused by excessive deployment. Even if the water absorbent element 843 fails to remain completely straight in some cases, its inherent compressive properties, made of materials such as absorbent sponge, provide a certain degree of adaptive compensation, ensuring effective contact with the inner wall of the gas meter upper shell 00 and improving the accuracy of airtightness detection.

[0052] To achieve comprehensive and efficient water vapor collection and ensure the accuracy and reliability of the airtightness testing method, this intelligent detection system specifically optimizes the material and structure of the water absorber 843. The water absorber 843 is made of a highly flexible composite material. Its structural design allows its lower portion to extend beyond the edge of the second connecting rod 8422, increasing the effective contact area. This design allows the water absorber 843 to adapt to deformation, automatically adjusting to the inner wall shape, and increasing the contact area and tightness with the inner wall of the gas meter upper shell 00. It should be noted that due to the limited length compression performance of the water absorber 843, it may not fully accommodate some upper shells with large aspect ratios. In such cases, the size or structural parameters of the water absorber 843 may need to be adjusted to suit the different gas meter upper shell specifications. Within the standard size range, the length of the water absorber 843 when fully flattened is designed to be at least equal to or slightly greater than the diagonal length of the gas meter upper shell 00. This design ensures that it covers the entire bottom surface area of ​​the gas meter upper shell 00 during rotation. Furthermore, the structure of the water-absorbing element 843 is flexible, allowing it to wipe all areas of the plane where moisture may be present during its upward rotation. Given the fluidity of water, liquid water typically collects on the bottom surface. Therefore, this inspection system prioritizes bottom wiping, while simplifies sidewall wiping. This ensures airtightness testing effectiveness while improving efficiency.

[0053] Furthermore, in order to enhance the performance of the water vapor rotating collection structure 84 and ensure the accuracy of the gas meter upper shell 00 airtightness detection, the intelligent detection system has deeply optimized the water absorption component, thereby improving the technical feasibility of the detection method. The side wall of the water absorption member 843 is designed with multiple slender water absorption strips 846 (this structure is only in Figure 8( , not shown in other figures). These water absorbing strips 846 have multiple functions: when the water absorbing member 843 moves to the bottom of the gas meter upper shell 00, the water absorbing strips 846 can penetrate into the recessed area at the bottom of the gas meter upper shell 00, filling the area that the main water absorbing member 843 cannot fully contact; during rotation, the water absorbing strips 846 significantly increase the effective contact area with the inner wall; more importantly, during high-speed rotation, parts of the water absorbing strips 846 are thrown outward due to centrifugal force, forming a dynamic contact pattern and achieving multiple contacts with various parts of the inner wall, thereby ensuring comprehensive and thorough water vapor collection and overcoming the detection blind spots existing in traditional air tightness testing methods.

[0054] To intelligently detect and quantitatively analyze the water vapor content adsorbed by the water absorber 843, this detection system is equipped with a specialized detection component system, which serves as the core technology for intelligent airtightness testing. This detection component primarily consists of two core components: a heater and a humidity sensor. The heater's primary function is to convert liquid water adsorbed by the water absorber 843 into water vapor, enabling accurate detection by the humidity sensor. The system collects humidity data from the humidity sensor and compares it with a pre-set standard humidity threshold. This data comparison allows an objective assessment of the airtightness of the gas meter's upper casing 00. The heater can be flexibly installed in a suitable location within or around the water vapor rotating collection structure 84, ensuring uniform heating without affecting the functions of other components. This humidity-based airtightness assessment method offers higher sensitivity and improved quantification compared to traditional observation methods.

[0055] The lifting component 82 is the actuator for the vertical movement of the water vapor rotating collection structure 84 in this intelligent detection system. It is a key power device in the implementation of the air tightness detection method and is responsible for controlling the extension and retraction of the detection element. The component adopts a motor drive method, including a lifting motor 821 as a power source, a belt drive structure 822 as a motion conversion device, and a screw structure 823 as a precise displacement control element. During operation, the lifting motor 821 drives the belt drive structure 822 to operate, and the belt drive structure 822 transmits the rotational motion to the screw structure 823. The screw structure 823 converts the rotational motion into a linear motion in the vertical direction and forms a connection with the rotating drive component 83 to realize the overall lifting function, ensuring that the water vapor rotating collection structure 84 can accurately reach the designated position in the upper shell 00 of the gas meter.

[0056] The rotary drive assembly 83 is responsible for the horizontal rotational movement of the water vapor rotary collection structure 84. It is a key component for achieving comprehensive water vapor collection and reflects the technological advancement of this detection system. This assembly mainly includes a rotary motor 831 as a rotary power source and a rotary output shaft 832 as a power transmission component. The rotary motor 831 adjusts the speed and direction of rotation through the control system, and the rotary output shaft 832 is directly connected to the water vapor rotary collection structure 84, accurately transmitting the motor's rotational movement to the collection device. This design enables the water vapor rotary collection structure 84 to rotate in all directions on the inner wall and bottom of the gas meter upper shell 00, ensuring the integrity and uniformity of water vapor collection.

[0057] In this embodiment, to enhance the overall structural stability and operational reliability of the intelligent detection system for fatigue strength and airtightness of the gas meter upper shell, the system is also equipped with several auxiliary support and protection components, including structural elements such as a housing frame and a connecting frame. These components primarily serve to protect the lifting assembly 82 and the rotary drive assembly 83, enhancing the secure connection between the components. They also provide a sound structural foundation for the entire detection system and ensure the smooth implementation of the detection method. Given that the lifting assembly 82 and the rotary drive assembly 83 utilize mature existing technologies and are not a core innovation of the present invention, their structural details will not be described in detail herein.

[0058] The control system of this intelligent detection system is the core management unit of the entire detection system. It is used to unify and coordinate the work processes of the first test unit 01 and the second test unit 02, realize automatic switching and data sharing between the two test units, and is the key technical support for the implementation of the intelligent detection method of the present invention.

[0059] The control system adopts a modular design, consisting primarily of hardware and software layers. The hardware layer includes a high-performance industrial-grade processor, large-capacity memory, an industrial control interface board, and human-computer interaction equipment. The software layer comprises system control software, data acquisition and processing modules, detection algorithms, and report generation modules. This structural design provides the control system with powerful data processing capabilities and flexible scalability, meeting the diverse needs of intelligent testing for fatigue strength and airtightness of gas meter upper shells.

[0060] The control system adopts a three-tiered architecture: the bottom layer is the device driver layer, responsible for direct communication and control with each actuator; the middle layer is the data processing layer, responsible for collecting, processing, and analyzing test data; and the top layer is the application management layer, responsible for coordinating the test process, determining results, and displaying interactive interfaces. Data exchange between these layers is achieved through standardized interfaces, ensuring system stability and reliability.

[0061] In terms of function realization, the control system mainly completes the following tasks: First, the control system establishes real-time communication with each actuator through the industrial bus, and accurately controls key components such as the clamping mechanism 30, the air pressure control system 40, the image acquisition and analysis system, the propulsion structure 70, and the humidity detection mechanism 80 to ensure that each test unit operates in a coordinated manner according to the predetermined program.

[0062] Secondly, the control system is responsible for collecting and processing test data. During the fatigue strength test phase, the system captures real-time deformation images of the elastic net bag 50 captured by the image acquisition and analysis system. Using a dedicated image processing algorithm, it calculates the deformation of the gas meter upper shell 00 and generates a deformation distribution map. During the airtightness test phase, the system collects humidity data from the humidity detection mechanism 80 and compares and analyzes it against a preset threshold.

[0063] Third, the control system enables intelligent switching and data sharing between the two test units. After the first test unit 01 completes the fatigue strength test, the system automatically evaluates the test results. For qualified products, the second test unit 02 is immediately activated for airtightness testing, without manual intervention. For unqualified products, the system terminates subsequent testing and issues an alarm. This automated workflow significantly improves testing efficiency and reduces human interference.

[0064] Fourth, the control system features a user-friendly human-machine interface, including a touchscreen display and an operator panel. This interface allows operators to easily set test parameters, monitor the test process, view test results, and generate test reports. The system interface utilizes an intuitive graphical design, combined with data visualization technology, to provide a clearer understanding of the test process and results.

[0065] Finally, the control system features powerful data management and report generation capabilities. The system automatically records and stores detailed data for each test, including test time, test object information, deformation data, and humidity values. Based on this data, it automatically generates standardized test reports. These reports can be exported in a variety of formats, facilitating quality analysis and tracking by production managers.

[0066] In addition, the control system has built-in self-diagnosis and remote maintenance functions, which can monitor the working status of each system component in real time, promptly detect and report potential faults, and support remote software upgrades and parameter adjustments, greatly improving the maintainability and service life of the system.

[0067] Through the implementation of the above functions, the control system of this intelligent detection system realizes the comprehensive automation and intelligence of the gas meter upper shell fatigue strength and air tightness detection process, provides strong technical support for the quality control of gas meter products, and reflects the innovative value of this invention in the field of gas meter detection.

[0068] The process and principle of the air tightness detection method implemented by the gas meter upper shell fatigue strength and air tightness intelligent detection system are as follows: After completing the fatigue strength test, the control system of this intelligent detection system automatically determines based on the test results and continues to perform airtightness testing on qualified products, achieving consistency and efficiency in the detection process, fully demonstrating the integrated detection advantages of this invention. The control system accurately controls the test process according to the following three main stages according to the preset program: The first stage is the test preparation phase. The control system first confirms, through the data processing layer, that the fatigue strength test results meet the requirements. It then issues instructions to maintain the sealed, press-fitted state of the gas meter upper housing 00. Simultaneously, it controls the air pressure control system 40 to completely depressurize the interior of the gas meter upper housing 00, returning the internal pressure to normal. The control system then sends precise displacement control instructions to the propulsion structure 70 through the device driver layer, controlling the upward movement of the water reservoir 60 until the gas meter upper housing 00 is completely immersed in the clean water within the water reservoir 60. The control system monitors the water level sensor data in real time to confirm that the clean water completely covers the outer surface of the gas meter upper housing 00, setting the stage for subsequent testing. Next, the control system switches the air pressure control system 40 to operate as a negative pressure control system, applying negative pressure to the sealed gas meter upper housing 00. Feedback control ensures that the negative pressure remains stable for a predetermined period. During this process, if there are even small leaks in the gas meter upper housing 00, water from outside will seep into the interior under the negative pressure, providing a basis for subsequent humidity testing.

[0069] The second stage is the water vapor collection phase. The control system sends a start command to the lifting assembly 82 via the industrial bus, precisely controlling the downward movement of the rotating water vapor collection structure 84 and monitoring position sensor feedback in real time until the connecting rod hinge assembly 842 completely clears the confines of the movable through-hole 323. The system detects the rebound force of the elastic member 844 through the force sensor, driving the connecting rod hinge assembly 842 and its connected water absorbent member 843 to expand to both sides, confirming that the water absorbent member 843 and its absorbent strip 846 are in close contact with the inner wall of the gas meter upper shell 00. The control system then sends precise speed control commands to the rotation drive assembly 83, driving the entire rotating water vapor collection structure 84 to rotate omnidirectionally within the gas meter upper shell 00. The control system uses software algorithms to calculate the optimal rotation speed and rotation path, ensuring that the water absorbent member 843 can complete a complete scan along the inner walls and bottom of the gas meter upper shell 00, achieving comprehensive water vapor collection. In particular, when the position sensor feedback shows that the water vapor rotating collection structure 84 moves down to the bottom of the gas meter upper shell 00, the control system automatically adjusts to a multi-turn rotation mode. By precisely controlling the number of rotations and the speed, it ensures that the water vapor that may accumulate at the bottom is fully absorbed by the water absorbing component 843 and the water absorbing strip 846, thereby improving the accuracy of the detection.

[0070] The third stage is the results analysis stage. After the water vapor collection is completed, the control system again sends a control command to the lifting assembly 82, precisely controlling the upward movement of the water vapor rotating collection structure 84 and confirming its gradual retraction into the movable through-hole 323 through position feedback. At this time, the control system activates the heating unit and humidity sensor in the humidity detection mechanism 80 to accurately measure the moisture content adsorbed by the water vapor rotating collection structure 84. The data processing layer of the control system collects and processes humidity data, and calculates the actual humidity value inside the gas meter upper shell 00 through filtering and calibration algorithms. The application management layer compares and analyzes this humidity value with the standard humidity threshold stored in the system database, automatically determining whether the airtightness of the test piece meets the requirements. For products with unqualified test results, the control system immediately issues an alarm signal and automatically records the relevant unqualified information in the database. At the same time, the detailed reasons for the unqualified and the data curve are displayed on the interactive interface, providing important reference data for production quality control and product improvement.

[0071] Through the intelligent management and precise control of the above control system, the present invention provides an efficient, accurate and automated comprehensive detection solution for the upper shell of the gas meter, which significantly improves the quality control level of the gas meter products and provides reliable protection for the safe use of the gas meter.

Claims

1. An intelligent detection system for fatigue strength and air tightness of gas meter upper shell, characterized in that: include: The first test unit (01) adopts a serial design and shares a workstation with the second test unit (02), and includes: an installation assembly frame (10) as an integral support frame; a test installation workstation (20) located at the lower part for positioning and fixing the gas meter upper shell (00); a pressing mechanism (30) installed at the upper part, which controls the tooling pressure plate (32) to form a sealed fit with the upper shell opening (001) through a driving structure (31); an air pressure control system (40) connected to the first gas connection port 004 and / or the second gas connection port 005 of the gas meter upper shell (00); an elastic net bag (50) connected to the lower surface of the workstation installation plate (13) to form a semi-enclosed structure, with a grid mark printed on the surface; and an image acquisition and analysis system, which monitors the state change of the elastic net bag (50) in real time through a camera and software, calculates the deformation amount and generates a deformation distribution map. The second test unit (02) comprises: a frame (03) connected to the bottom of the first test unit (01) to form a support; a water container (60) combined with a push structure (70) for immersing the gas meter upper shell (00) in water for testing; a negative pressure control system, which realizes function conversion through the air pressure control system (40) shared with the first test unit (01), applies negative pressure to the inside of the immersed gas meter upper shell (00), and allows external moisture to enter through the leakage point; a humidity detection mechanism (80) installed on the upper end of the tooling pressure plate (32) and connected to the inside of the gas meter upper shell (00) through a movable through hole (323); and the control system coordinates the work processes of the two test units (01) (02).

2. The intelligent detection system for fatigue strength and air tightness of the upper shell of a gas meter according to claim 1 is characterized in that: The tooling pressure plate (32) comprises a press-fitting inserting portion (321) and a press-fitting sealing portion (322); a recess (3211) is provided at the lower corner of the press-fitting inserting portion (321); and protruding sealing edges (3221) protruding outward are provided on the surrounding side walls of the press-fitting sealing portion (322); and a movable through hole (323) is provided on the tooling pressure plate (32).

3. The intelligent detection system for fatigue strength and air tightness of the upper shell of a gas meter according to claim 1 is characterized in that: The air pressure control system (40) comprises a first gas blowing and sucking dual-purpose part (41) and a second gas blowing and sucking dual-purpose part (42), wherein the first gas blowing and sucking dual-purpose part (41) and the second gas blowing and sucking dual-purpose part (42) are respectively in airtight communication with a first gas connection port (004) and a second gas connection port (005) on the upper shell (00) of the gas meter.

4. The intelligent detection system for fatigue strength and air tightness of the upper shell of a gas meter according to claim 1 is characterized in that: The lifting assembly (82) in the humidity detection mechanism (80) specifically includes a vertically arranged lifting motor (821), the output shaft of the lifting motor (821) is connected to a belt transmission structure (822), the belt transmission structure (822) is transmission-connected to a screw structure (823), and the screw structure (823) converts the rotational motion output by the motor into a vertical linear motion; the rotary drive assembly (83) specifically includes a rotary motor (831) arranged parallel to the ground, the rotary motor (831) drives the rotary output shaft (832) to rotate; the lower end of the rotary output shaft (832) is fixedly connected to a water vapor rotary collection structure (84), and drives the water vapor rotary collection structure (84) to collect water vapor through coaxial rotation.

5. The intelligent detection system for fatigue strength and air tightness of the upper shell of a gas meter according to claim 4 is characterized in that: The water vapor rotating collection structure (84) specifically includes: a disc-shaped connecting cover (841), wherein the connecting cover (841) is fixedly connected to the lower end of the rotating output shaft (832), and the entire water vapor rotating collection structure (84) is driven to rotate via the rotating output shaft (832); Two groups of symmetrically arranged connecting rod hinge assemblies (842) are hinged to the inner edge of the connecting cover (841), and the inner edge of the connecting cover (841) has two fixed connecting ears (845). The two groups of connecting rod hinge assemblies (842) are symmetrically hinged through the fixed connecting ears (845), and each group of the connecting rod hinge assemblies (842) includes three mutually hinged connecting rods: a first connecting rod (8421), a second connecting rod (8422) and a third connecting rod (8423). The first connecting rod (8421) is a connecting rod with a first end, a second connecting rod (8422) is a connecting rod with a second end, and a third connecting rod (8423) is a connecting rod with a first end. One end of the connecting rod (8421) is hinged to the center of the bottom of the connecting cover (841) to form a first hinged portion (851), the other end of the first connecting rod (8421) is hinged to the second connecting rod (8422) to form a second hinged portion (852), one end of the third connecting rod (8423) is hinged to the fixed ear (845) to form a third hinged portion (853), and the other end of the third connecting rod (8423) is hinged to the second hinged portion (852), forming a complete motion chain; The water absorbing member (843) is slidably connected to the connecting rod hinge assembly (842), and a sliding groove (847) is provided on the side wall of the third connecting rod (8423). The sliding groove (847) forms a sliding fit with the sliding plate (848), and the sliding plate (848) is fixedly connected to the water absorbing member (843), so that the water absorbing member (843) can move adaptively while the connecting rod rotates.

6. The intelligent detection system for fatigue strength and air tightness of the upper shell of a gas meter according to claim 5, characterized in that: The side wall of the water absorbing member (843) is provided with a plurality of slender water absorbing strips (846) for increasing the contact area with the inner wall of the upper shell (00) of the gas meter; The water vapor rotating collection structure (84) specifically further includes: an elastic member (844) connected between the two water absorbing members (843); the elastic member (844) has a rebound performance and is in a bent and compressed state in the initial state of the system; when the water vapor rotating collection structure (84) is freed from the restriction of the movable through hole (323), the rebound force of the elastic member (844) drives the connecting rod hinge assembly (842) to rotate and unfold; A limit plate (849) is connected to the second hinge portion (852), and the limit plate (849) is used to limit the maximum rotation angle of the connecting rod hinge assembly (842), ensuring that the water absorbing member (843) maintains an ideal straight posture in the unfolded state.

7. The intelligent detection system for fatigue strength and air tightness of the upper shell of a gas meter according to claim 6, characterized in that: The inner edge of the connecting cover (841) has two fixed ears (845), and the two groups of connecting rod hinge assemblies (842) are symmetrically hinged through the fixed ears (845). One end of the first connecting rod (8421) is hinged to the center of the bottom of the connecting cover (841) to form a first hinge part (851), and the other end of the first connecting rod (8421) is hinged to the second connecting rod (8422) to form a second hinge part (852). One end of the third connecting rod (8423) is hinged to the fixed ears (845) to form a third hinge part (853), and the other end of the third connecting rod (8423) is hinged to the second hinge part (852); a sliding groove (847) is provided on the side wall of the third connecting rod (8423), and the sliding groove (847) forms a sliding fit with the sliding plate (848), and the sliding plate (848) is fixedly connected to the water-absorbing component (843).

8. A gas meter upper shell detection method, characterized in that: The following steps are involved: Installing and positioning the gas meter upper shell (00) at the test installation station (20) of the gas meter upper shell fatigue strength and airtightness intelligent detection system according to claim 1; Conduct fatigue strength test, including the following steps: Step 1: driving the pressing mechanism (30) to move the tooling pressing plate (32) downward and form a sealing fit with the opening end (001) of the upper shell (00) of the gas meter; Step 2: The air pressure control system (40) injects test gas into the interior of the gas meter upper shell (00) to perform a cyclic pressurization test; Step 3: The image acquisition and analysis system acquires and analyzes the state of the elastic net bag (50) to determine whether the gas meter upper shell (00) meets the fatigue strength requirements; The gas meter upper shell (00) that has passed the fatigue strength test is then subjected to an airtightness test at the original testing position and in a compressed state, including the following steps: Step 1: depressurizing the air pressure control system (40) to return the internal pressure of the gas meter upper shell (00) to normal pressure; Step 2: The pushing structure (70) controls the water tank (60) to move upward, so that the upper shell (00) of the gas meter is immersed in the clean water in the water tank (60); Step 3: The negative pressure control system applies negative pressure to the interior of the gas meter upper shell (00), so that external moisture enters the interior through the leakage point of the gas meter upper shell (00) under the action of negative pressure; Step 4: Start the lifting assembly (82) and the rotation drive assembly (83) to control the water vapor rotation collection structure (84) to collect water vapor inside the gas meter upper shell (00); Step 5: The humidity detection mechanism (80) detects the collected water vapor content to determine whether the air tightness of the gas meter upper shell (00) is qualified.

9. The gas meter upper shell detection method according to claim 9, characterized in that: The cyclic pressure test comprises the following steps: Step 1: The air pressure control system (40) injects test gas into the sealed upper shell (00) of the gas meter according to a predetermined program to form an initial test pressure; Step 2: The system sets different pressure cycle modes, including one or more of constant pressure maintenance, step pressure increase, and periodic pressure fluctuation, to comprehensively evaluate the structural response of the gas meter upper shell (00) under various working conditions; Step 3: The elastic net bag (50) changes in response to slight deformation of the gas meter upper shell (00), and these changes are magnified and visualized through the grid marks on its surface; Step 4: The image acquisition and analysis system acquires the state of the elastic net bag (50) and compares it with the initial state, calculates the actual deformation of the gas meter upper shell (00) at various locations, and generates a deformation distribution diagram.

10. The gas meter upper shell detection method according to claim 9, characterized in that: The water vapor collection comprises the following steps: Step 1: Start the lifting assembly (82) to control the water vapor rotating collection structure (84) to move downward until the connecting rod hinge assembly (842) is completely free from the restriction of the movable through hole (323); Step 2: The rebound force of the elastic member (844) drives the connecting rod hinge assembly (842) and the connected water absorbing member (843) to expand to both sides, so that the water absorbing member (843) and the water absorbing strip (846) form a close contact with the inner wall of the gas meter upper shell (00); Step 3: The rotary drive assembly (83) is started, driving the entire water vapor rotary collection structure (84) to rotate in all directions inside the gas meter upper shell (00), and the water absorbing member (843) performs a complete scan along the inner wall and bottom of the gas meter upper shell (00) to achieve comprehensive collection of water vapor; Step 4: When the water vapor rotating collection structure (84) moves down to the bottom of the gas meter upper shell (00), the system controls the rotary drive assembly (83) to rotate multiple times to ensure that the water vapor that may accumulate at the bottom is fully absorbed by the water absorbing member (843) and the water absorbing strip (846); Step 5: The lifting component (82) controls the water vapor rotating collection structure (84) to move upward, causing it to gradually retract into the movable through hole (323). The detection component accurately measures the moisture content adsorbed by the water vapor rotating collection structure (84) to obtain the actual humidity value inside the gas meter upper shell (00).

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