A side pressure door and window load force detection device

Abstract

The present application relates to door and window detection technical field, specifically to a kind of side pressure door and window load force detection device, including detection platform and bearing base, workpiece carrier plate and compression frame are provided on it to form test area, top linear actuator drives pressure executor to exert lateral load.Bearing base is equipped with compression mechanism, workpiece carrier plate rear side reference card frame positions door and window hinge side, and front compression support compression fixed door and window other side.Inner load application component supports door and window inner frame, and outer frame detection component detects its support end in equipment chamber.Second compression support compression end covers support area and is equipped with undulation detection component, and side pressure door and window deformation, inner frame undulation and outer frame air tightness are synchronously detected, and multiple-parameter coupling analysis is realized.The present application has multidimensional performance evaluation capability, and wind pressure deformation, air tightness leakage and frame fluctuation spectrum are synchronously detected, to provide full-dimensional data support for door and window comprehensive performance grading.

Description

Technical Field

[0001] The present invention relates to the technical field of door and window detection, in particular to a device for detecting the load force of a side-pressure door and window. Background Art

[0002] With rising building energy-efficiency standards and the increasing frequency of extreme weather events, doors and windows, as key components of building envelopes, face increasing pressure resistance, structural stability, and airtightness, becoming key indicators for ensuring building safety and energy efficiency. This is especially true in high-rise buildings, coastal areas prone to typhoons, and cold regions, where the reliability of doors and windows under complex operating conditions such as lateral wind loads and unexpected impacts directly impacts operational safety.

[0003] Doors and windows achieve excellent sealing performance by applying lateral pressure to tightly fit against the sealing strips in the window frame. Frame deformation is a direct cause of airtightness failure. Current door and window inspection equipment mostly uses static pressure application or single-point deformation measurement, such as applying lateral pressure with a hydraulic cylinder and recording displacement. While these technologies can assess basic compressive resistance, they cannot simultaneously monitor dynamic parameters such as airflow leakage and frame fluctuations, resulting in a single-dimensional inspection. They are unable to reflect the correlation between structural deformation and airtightness changes under dynamic impact, resulting in deviations between test results and actual operating conditions. Summary of the Invention

[0004] The object of the present invention is to provide a device for detecting the load force of side-pressure doors and windows to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A side-pressure door and window load force detection device includes a detection platform, characterized in that: a bearing base is provided on the top of the detection platform; a workpiece carrier and a pressing frame mounted on the workpiece carrier are provided on the bearing base; a test area is defined between the frame of the pressing frame and the workpiece carrier; a linear actuator is installed on the top of the frame of the pressing frame, and the output end of the linear actuator extends into the test area and is connected to a pressure actuator;

[0007] The table top of the bearing base is also provided with a pressing mechanism, an internal load applying component and an outer frame detection component;

[0008] The pressing mechanism is arranged in front of the workpiece carrier and is fixed by the frame mounting groove on the bearing base table; the pressing mechanism includes a first pressing bracket and a second pressing bracket; the rear edge line of the workpiece carrier is provided with a reference card frame for positioning the door and window hinge side, and the other side of the door and window is pressed and fixed by the first pressing bracket and the second pressing bracket;

[0009] The internal load applying assembly is arranged on the workpiece carrier plate, and its supporting end is used to abut against the inner frame of the door and window; the side edge of the table of the bearing base is provided with an equipment chamber, and the external frame detection assembly is installed in the equipment chamber with its detection end pointing to the supporting end of the internal load applying assembly;

[0010] The pressing end of the second pressing bracket covers the supporting area of ​​the internal load applying component, and the pressing end is provided with a undulation detection component.

[0011] As a further solution of the present invention: the pressing mechanism includes a mechanism base plate and a mechanism frame fixed to the frame mounting slot; a linear slide rail and a belt transmission mechanism are provided on the mechanism base plate; the first pressing bracket and the second pressing bracket are both installed on the linear slide rail through a slider, and each slider is connected to the belt surface of the belt transmission mechanism.

[0012] As a further solution of the present invention: the first pressing bracket and the second pressing bracket are driven by independent belt transmission mechanisms, or are synchronously driven by the same belt transmission mechanism.

[0013] As a further solution of the present invention: the first pressing bracket and the second pressing bracket both include: a lifting pusher vertically installed on the slider, a horizontal translation pusher installed on the lifting rod of the lifting pusher, a fixed machine base arranged at the output end of the translation pusher, and a positioner fixed on the fixed machine base; the pressing end of the positioner is provided with a pressing track, and the pressing track is embedded with a pressing buckle plate.

[0014] As a further solution of the present invention: the internal load application assembly includes a displacement base plate and a forward moving machine box slidably mounted thereon; a guide support rod is provided at the front end of the forward moving machine box, and a front end support plate is installed at the output end of the guide support rod; a plurality of elastic damping cylinders are provided on the front end support plate, and the end of each elastic damping cylinder is provided with a load applying head for abutting the gap in the inner frame of the door and window.

[0015] As a further solution of the present invention: the forward moving machine box is a closed box body; the guide support rod is a hollow tube body and is passed through the elastic damping cylinder; an exhaust ring is provided at the load application head; a gas distribution box is provided on the displacement substrate, and the gas distribution box is connected to the interior of the forward moving machine box through an air supply pipeline, forming an air path in which the air flow ejected by the exhaust ring impacts the gap in the inner frame of the door and window.

[0016] As a further solution of the present invention: the outer frame detection assembly includes a detection mechanism box, a lateral support machine box arranged thereon, and an external contact probe rod installed on the lateral support machine box; the free end of the external contact probe rod is provided with an adsorption ring for adsorbing the outer frame of the door and window, and the adsorption ring corresponds to the position of the load applying head of the internal load applying assembly.

[0017] As a further solution of the present invention: a positioning limit slot is provided on the lateral support box; the external contact probe is inserted into the positioning limit slot, and its bottom is installed in the inner cavity of the lateral support box through a ball hinge, so that the external contact probe can swing within the limited range of the positioning limit slot.

[0018] As a further solution of the present invention: a lower edge support frame is provided at the bottom of the detection mechanism box, and a displacement sensing cylinder is installed at the bottom end of the lower edge support frame; the detection end of the displacement sensing cylinder is connected to a contact probe, and the contact probe is connected to the external contact probe rod through a piston push rod; the swing of the external contact probe rod is transmitted to the displacement sensing cylinder through the piston push rod, and the fluctuation frequency of the outer frame of the door and window is obtained by detecting the change of air pressure in the cylinder.

[0019] As a further solution of the present invention: the undulation detection component is arranged between the fixed base and the locator of the second pressing bracket; it includes a detection module fixed on the fixed base, and the detection module is provided with a rotating support bearing and a measuring turntable; the locator is installed on the surface of the measuring turntable, and the shaft of the measuring turntable is passed through the rotating support bearing; the rotating support bearing is integrated with an angle displacement detector for detecting the rotation angle of the measuring turntable shaft.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The clamping mechanism utilizes a coordinated clamping design between a first and second clamping bracket. A belt drive mechanism drives the slider on a linear slide. Combined with a lift actuator and a lateral translation actuator, it achieves three-axis positioning, adapting to varying door and window sizes. An internal load-applying assembly directs airflow into the window gap through an air system. The hydraulic oil chamber and spring assembly of the elastic damping cylinder absorb deformation shock, simulating wind pressure and maintaining dynamic seal balance.

[0022] The outer frame detection component absorbs the frame through the adsorption ring, and the external contact probe connected by the ball hinge transmits the fluctuation to the displacement sensing cylinder, combined with the pressure difference sensing technology to capture the micron-level deformation frequency; the undulation detection component is integrated into the press-fit bracket, and the angular grating encoder of the measuring turntable is used to convert the angular displacement into linear undulation height, realizing high-precision dynamic monitoring.

[0023] The present invention has the ability to evaluate multi-dimensional performance, and can simultaneously detect wind pressure deformation, airtightness leakage and frame fluctuation spectrum, breaking through the limitations of traditional single-point detection and providing full-dimensional data support for the comprehensive performance grading of doors and windows; through multi-degree-of-freedom force-sensing collaboration, pneumatic-mechanical coupling and dynamic compensation mechanism, it can achieve full-dimensional quantitative evaluation of the performance of doors and windows under complex loads, meeting standards such as GB / T 7106-2019 for building doors and windows.

[0024] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are incorporated into and constitute a part of the specification to illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the present application. These drawings and the accompanying description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments.

[0026] Figure 1 This is a structural schematic diagram of a side pressure door and window load force detection device provided by an embodiment of the present invention.

[0027] Figure 2 A schematic top view of a device for detecting the load force of side-pressure doors and windows provided in an embodiment of the present invention.

[0028] Figure 3 A schematic structural diagram of a pressing mechanism provided in an embodiment of the present invention.

[0029] Figure 4 A schematic structural diagram of a first press-fit bracket provided in an embodiment of the present invention.

[0030] Figure 5 A schematic structural diagram of an internal load application assembly provided in an embodiment of the present invention.

[0031] Figure 6 A schematic structural diagram of an outer frame detection component provided in an embodiment of the present invention.

[0032] Figure 7 This is a schematic structural diagram of a second press-fit bracket provided in an embodiment of the present invention.

[0033] In the figure: 1. Testing platform; 11. Carrying base; 12. Workpiece carrier; 13. Pressing frame; 14. Testing area; 15. Linear actuator; 16. Pressure actuator; 17. Equipment chamber; 18. Frame mounting slot; 2. Pressing mechanism; 21. Mechanism base plate; 22. Mechanism frame; 23. Belt transmission mechanism; 24. Slider; 25. Linear slide; 3. First pressing bracket; 31. Lifting pusher; 32. Translation pusher; 33. Fixed base; 34. Positioner; 35. Pressing track; 36. Pressing buckle plate; 4. Second pressing bracket; 5. Internal load applying assembly; 51. Displacement base Plate; 52. Forward moving box; 53. Front end support plate; 54. Elastic damping cylinder; 55. Load applying head; 56. Exhaust ring; 57. Guide support rod; 58. Air supply pipeline; 59. Gas distribution box; 6. Outer frame detection assembly; 61. Detection mechanism box; 62. Lateral support box; 63. Positioning limit slot; 64. External contact probe; 65. Adsorption ring; 66. Lower edge support frame; 67. Displacement sensing cylinder; 68. Contact probe; 69. Piston push rod; 7. Fluctuation detection assembly; 71. Detection module; 72. Rotating support bearing; 73. Measuring turntable; 74. Angle displacement detector. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0035] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0037] For example 1, please refer to Figure 1 and Figure 2, provides a side pressure door and window load force detection device, the main body of which is composed of a detection platform 1, with a bearing base 11 on the top. The bearing base 11 is formed by welding high-strength steel plates, and the table is installed with a workpiece carrier 12 and a pressing frame 13, which together form a test area 14 for placing door and window specimens. The top of the pressing frame 13 is equipped with a linear actuator 15, and its output end is connected to a pressure actuator 16. The actuator is a rigid pressure head with a pressure sensor, which can accurately control the pressure intensity and displacement. A reference card frame is provided on the rear side of the workpiece carrier 12, which adopts a contoured positioning groove structure to ensure that the hinge side of the door and window is accurately fixed. The other side of the door and window is pressed and fixed by the first pressing bracket 3 and the second pressing bracket 4; the internal load applying component 5 is arranged on the surface of the workpiece carrier plate 12, and its supporting end is used to abut the inner frame of the door and window; the table side edge of the supporting base 11 is provided with an equipment chamber 17, and the outer frame detection component 6 is installed in the equipment chamber 17 and its detection end points to the supporting end of the internal load applying component 5; the pressing end of the second pressing bracket 4 covers the supporting area of ​​the internal load applying component 5, and the pressing end is provided with a undulation detection component 7.

[0038] Operation process;

[0039] 1. Installation phase: Insert the hinge side of the door / window specimen into the reference card frame, and activate the first pressing bracket 3 and the second pressing bracket 4 to clamp and fix it at multiple points from the non-hinge side;

[0040] 2. Load application: The linear actuator 15 drives the pressure actuator 16 to apply lateral pressure to the door and window glass area. At the same time, the servo cylinder of the internal load application assembly 5 abuts the inner frame to simulate internal load transfer;

[0041] 3. Data Collection: The outer frame detection component 6 records the strain data of the door and window frames in real time, calibrates the flatness through the undulation detection component 7, and combines the pressure feedback from the pressure actuator 16 to draw a load-deformation curve;

[0042] 4. Failure determination: When the deformation exceeds the set threshold or the glass breaks, the system automatically terminates the test and generates a test report.

[0043] This device realizes composite force simulation through a multi-level loading system: the linear actuator 15 provides the main loading force, the internal load component 5 simulates the internal stress state after the doors and windows are installed, and the outer frame detection component 6 synchronously monitors the coordinated deformation of the overall structure. Using closed-loop control technology, the applied pressure is dynamically adjusted according to real-time feedback data to ensure the linearity of the loading curve. Among them, the undulation detection component 7 calibrates the flatness and combines the Kalman filter algorithm to eliminate vibration interference to achieve micron-level deformation measurement accuracy. This embodiment integrates lateral pressure, internal stress loading and multi-point deformation detection functions, which can comprehensively evaluate the lateral pressure resistance of doors and windows; it complies with the requirements of building door and window inspection standards such as GB / T7106-2019.

[0044] For example 2, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 Based on the structure described in the above embodiment, the specific implementation structure of the pressing mechanism 2 is designed as follows:

[0045] The pressing mechanism 2 of this embodiment is fixed to the table surface of the supporting base 11 through the frame mounting groove 18, and includes a mechanism base plate 21 and a mechanism frame 22 covering the notch of the frame mounting groove 18. Two linear slide rails 25 are arranged in parallel on the mechanism base plate 21, and a slider 24 is assembled on the linear slide rail 25. The slider 24 is fixedly connected to the belt surface of the belt transmission mechanism 23 through a connecting piece. Among them, the belt transmission mechanism 23 adopts a synchronous belt pulley drive system. The motor drives the driving pulley to rotate through the reducer, driving the synchronous belt to move. The first pressing bracket 3 and the second pressing bracket 4 are driven by independent belt transmission mechanisms 23 respectively, or are synchronously linked by the closed-loop belt surface of the same belt transmission mechanism 23 to achieve bidirectional synchronous displacement.

[0046] The first pressing bracket 3 and the second pressing bracket 4 have the same structure, and are both composed of a lifting pusher 31 , a lateral translation pusher 32 , a fixed base 33 and a positioner 34 .

[0047] The lifting pusher 31 is vertically installed on the slider 24 and adopts a servo electric cylinder or a hydraulic cylinder. The axis of its lifting rod is perpendicular to the surface of the detection platform 1, with a stroke range of 0-50mm and an accuracy of ±0.1mm; the lateral translation pusher 32 is fixed to the end of the lifting rod of the lifting pusher 31 and adopts a pneumatic slide. The output end is telescopically adjusted in the horizontal direction with an adjustment stroke of ±50mm; the fixed machine base 33 is fixed to the output end of the translation pusher 32 and is cast from high-strength aluminum alloy. The locator 34 is fixed to the front end of the fixed machine base 33 by bolts, and its pressing end is provided with a pressing track 35 with a dovetail groove structure, and the pressing track 35 has a pressing buckle plate 36 embedded in it; the pressing buckle plate 36 is made of polyurethane composite material and the surface is covered with an anti-slip texture.

[0048] During operation, the belt drive mechanism 23 drives the slider 24 along the linear guide rail 25, moving the first and second pressing brackets 3 and 4 to the preset positions on the non-hinge side of the door or window. The lift actuator 31 lowers the positioner 34 to the height of the door or window frame. The lateral translation actuator 32 pushes the fixed base 33 horizontally forward, bringing the pressing plate 36 into contact with the door or window side frame. The lift actuator 31 applies a preload force of 5–15 kPa.

[0049] The spacing between the two pressing brackets is dynamically adjusted according to the size of the door and window: if they are driven independently, the belt transmission mechanism 23 controls the brackets to move to the target position respectively; if they are driven synchronously, the two brackets always move symmetrically to ensure uniform pressure distribution.

[0050] Preferably, the compression buckle plate 36 can be provided with a spring pre-tightening mechanism to absorb the displacement deviation caused by the compression deformation of the door and window.

[0051] For example three, please refer to Figure 1 、 Figure 2 and Figure 5 Based on the structure described in the above embodiment, on this basis, the specific implementation structure of the internal load applying component 5 is designed as follows:

[0052] The internal load application assembly 5 of this embodiment consists of a displacement base 51, a forward movement housing 52, guide support rods 57, a front support plate 53, elastic damping cylinders 54, and a load application head 55. The displacement base 51 is fixed to the workpiece carrier 12 of the support base 11 via slide rails. Adjustment grooves are provided on its surface to enable fine-tuning of its lateral position. The forward movement housing 52 is a sealed stainless steel box housing an integrated pneumatic piston assembly, which is slidably connected to the displacement base 51 via a sliding mechanism. The guide support rods 57 are hollow high-strength alloy tubes, one end fixed to the front end of the forward movement housing 52 and the other end extending through the center of the front support plate 53. The front support plate 53 is a honeycomb aluminum structure with several groups of elastic damping cylinders 54 evenly distributed around the circumference. These elastic damping cylinders 54 contain disc spring assemblies and hydraulic oil chambers to provide axial elastic travel. A load application head 55 is mounted at the end of each elastic damping cylinder 54. Its contact end is covered with a polyurethane anti-slip layer, and its bottom is fitted with an annular exhaust ring 56. The exhaust ring 56 is connected to the air path through the inner cavity of the guide support rod 57. The air circuit system is a closed loop consisting of a gas distribution box 59, an air supply pipe 58 and an exhaust ring 56: the gas distribution box 59 integrates an air pressure regulating valve and a flow meter, and injects 0.2-0.8MPa compressed air into the forward moving box 52 through the air supply pipe 58; the air flow is pressurized in the internal cavity of the forward moving box 52 and enters the inner cavity of the guide support rod 57, and is finally ejected from the exhaust ring 56 of the load applying head 55, forming a directional airflow impact.

[0053] The silicone sealing lip of the load applying head 55 and the window gap form a temporary closed chamber, the exhaust ring 56 sprays air to simulate the airflow impact inside the window, and the outer frame detection component 6 monitors the pressure changes outside the window to evaluate the degree of air leakage.

[0054] Airflow impact simulation:

[0055] The gas distribution box 59 injects air into the closed chamber and controls the pressure (simulating 10-50Pa wind pressure) through the proportional valve for 5-15 seconds. When the air flows through the window gap, the adsorption ring 65 of the outer frame detection component 6 adsorbs the outer surface of the window frame, and the displacement sensing cylinder 67 detects the fluctuation frequency of the outer frame.

[0056] Airtightness determination:

[0057] If the window is airtight: the pressure in the chamber remains stable, and the outer frame detection component 6 records a fluctuation frequency of <5Hz;

[0058] If there is air leakage: the pressure is significantly attenuated (ΔP ≥ the set threshold), the outer frame fluctuation frequency is greater than 15Hz, and the frequency domain spectrum shows abnormal peaks.

[0059] Dynamic compensation and reset:

[0060] The elastic damping cylinder 54 compensates for the compressive deformation of the window in real time, the gas distribution box 59 switches to the negative pressure mode to withdraw the residual gas, and the load applying head 55 is reset.

[0061] Pressure difference-airflow coupling model:

[0062] Based on the ideal gas equation (ΔP·V=nRΔT), gas is injected into the sealed chamber through the exhaust ring 56 to establish a pressure difference. Leakage through the window gap causes pressure decay (ΔP), and the leakage rate (Q=ΔP·V / t) is calculated in combination with temperature compensation.

[0063] Window leakage criteria:

[0064] Q=V / Pa·ΔP / Δt

[0065] (V: closed chamber volume, Pa: atmospheric pressure, Δt: detection time). When Q>0.5cm³ / min, it is considered as air leakage failure.

[0066] This embodiment integrates airflow impact and pressure monitoring to achieve joint detection of window "wind pressure resistance-air tightness", providing core data support for the performance grading of energy-saving doors and windows.

[0067] For example 4, please refer to Figure 1 、 Figure 2 and Figure 6 Based on the structure described in the above embodiment, on this basis, the specific implementation structure of the outer frame detection component 6 is designed as follows:

[0068] The outer frame detection assembly 6 consists of core components, including a detection mechanism housing 61, a lateral support housing 62, and an external contact probe 64. The detection mechanism housing 61 is a cast aluminum alloy shell, with the lateral support housing 62 bolted to its top. The lateral support housing 62 has dual internal rails and a spherical hinge mount integrated into its bottom. The external contact probe 64 is mounted within the hinge mount via a spherical hinge, enabling ±15° of freedom of swing. The external contact probe 64 utilizes a carbon fiber composite rod body, with an adsorption ring 65 mounted on its free end.

[0069] The positioning and limiting slot 63 is a dovetail groove structure with an embedded polytetrafluoroethylene wear-resistant bushing. A lower edge support frame 66 extends from the bottom of the detection mechanism box 61, which adopts a triangular truss reinforcement structure, and a displacement sensing cylinder 67 is installed at the end. The displacement sensing cylinder 67 has a built-in differential pressure sensor. The detection end is connected to the contact probe 68 via a flexible coupling. The piston push rod 69 uses a bidirectional ball screw drive with a stroke accuracy of ±0.01mm. The contact probe 68 is connected to the external contact probe rod 64 by a magnetic coupler, achieving a vibration transmission efficiency of ≥95%.

[0070] The adsorption ring 65 adsorbs the surface of the outer frame of the door and window. When the door and window are subjected to lateral loads, the deformation of the outer frame causes the external contact probe 64 to swing. The ball hinge allows the probe to micro-move in multiple directions in the positioning limit slot 63. The swing amplitude is converted into the linear displacement of the contact probe 68 by the piston push rod 69, pushing the piston in the displacement sensing cylinder 67 to move. The differential pressure sensor in the displacement sensing cylinder 67 converts the piston displacement into an air pressure change signal, and calculates the fluctuation frequency through the pressure difference, with a sampling frequency of 1kHz. The detection mechanism box 61 has a built-in FFT analysis module, which converts the time domain signal into a 0-500Hz frequency domain spectrum to identify abnormal resonance peaks. The combination of differential pressure sensing and frequency domain analysis can identify low-frequency fluctuations of 0.1Hz, which is suitable for modal analysis of the wind pressure resistance of doors and windows. The detection accuracy is improved by 80% compared with traditional strain gauges.

[0071] For example five, please refer to Figure 1 、 Figure 3 、 Figure 4 and Figure 7 Based on the structure described in the above embodiment, the specific implementation structure of the undulation detection component 7 is designed as follows:

[0072] The undulation detection assembly 7 of this embodiment is integrated between the fixed base 33 and the positioner 34 of the second press-fit bracket 4. It primarily consists of a detection module 71, a rotating support bearing 72, a measuring turntable 73, and an angular displacement detector 74. The detection module 71 utilizes a high-strength aluminum alloy base and is bolted to the sidewall of the fixed base 33. It integrates signal processing circuitry, supporting real-time data filtering and temperature compensation. The rotating support bearing 72 is a precision angular contact ball bearing with a high-precision conductive slip ring embedded in its inner ring, which transmits the electrical signal from the angular displacement detector 74. The bearing has an axial stiffness of ≥200 N / μm and a radial runout error of ≤±0.001 mm. The measuring turntable 73 is constructed of carbon fiber composite material with a diameter of 150 mm. The central shaft is constructed of hard alloy steel, achieving a surface hardness of HRC60 after heat treatment. The shaft extends through the inner ring of the rotating support bearing 72. The angular displacement detector 74 is a photoelectric encoder integrated into the inner cavity of the rotating support bearing 72, with a resolution of 0.001° and a sampling frequency of 10 kHz. Its working principle is based on grating moiré fringe phase difference detection, and the angle change is captured by the 1024-line grating disk etched on the disk surface.

[0073] After the door and window profile is clamped and secured by the first and second clamping brackets 3 and 4, the clamping plate 36 of the positioner 34 contacts the profile surface, with a preload force set to 5N±1N. When lateral pressure is applied, the surface undulations of the door and window profile cause the positioner 34 to slightly deflect, driving the measuring turntable 73 to rotate within a range of ±5° around its axis. The conductive slip ring within the rotating support bearing 72 continuously transmits the angle signal. The angular displacement detector 74 monitors the shaft angle θ (in radians) in real time. Combined with the length L of the lever arm from the clamping rail 35 to the axis of rotation (set to 120mm), the profile surface undulation height h = L·sinθ is calculated. When θ ≤ 0.1rad, the approximate value is h ≈ L·θ, with a calculated error of less than 1%.

[0074] This embodiment converts the linear surface undulations of compressed door and window profiles into angular displacements of the measuring disc 73, enhancing detection sensitivity through the principle of lever amplification. A grating encoder utilizes light interference to convert minute angular variations into quantifiable electrical signals, achieving a resolution of 0.18μm (corresponding to a 120mm lever arm). By integrating the angular-to-linear displacement conversion mechanism with high-precision grating detection technology, this embodiment addresses the vulnerability of traditional contact probes to high-pressure environments. It provides real-time dynamic undulation data for door and window load testing, significantly improving the reliability of lateral pressure resistance assessment.

[0075] In order to further illustrate the present application, the detection steps of the above-mentioned side pressure door and window load force detection device are also disclosed as follows;

[0076] Step 1: Operate the first and second pressing brackets 3 and 4 of the pressing mechanism 2. The belt drive mechanism 23 drives the slider 24 to move laterally along the linear guide rail 25, adjusting the spacing to accommodate different window sizes. Synchronously control the lifting actuator 31 and the lateral translation actuator 32 to ensure that the polyurethane anti-slip layer of the pressing plate 36 adheres tightly to the door and window profile. The suction ring 65 is activated to adhere to the edge of the window frame, while the silicone sealing lip of the load-applying head 55 is compressed to fill the window gap, forming a temporarily sealed chamber.

[0077] Step 2: Gas distribution box 59 delivers compressed air to forward-moving housing 52 via air supply line 58. The airflow is directed through the inner cavity of guide support rod 57 to annular exhaust ring 56, simulating a gradient wind pressure impacting the window. The elastic damping cylinder 54 absorbs deformation impact energy through disc springs and a hydraulic oil chamber. The distributed sensing system is simultaneously activated: the ball hinge of the outer frame detection assembly 6 connects to the external contact probe 64, transmitting the frame displacement to the displacement sensing cylinder 67 to capture the fluctuation spectrum. The undulation detection assembly 7 drives the deflection of the measuring turntable 73 via the rotating support bearing 72. The grating encoder converts the rotation angle into the height of the profile surface undulation.

[0078] Step 3: Based on the pressure decay rate and fluctuation spectrum characteristics recorded by the displacement sensing cylinder 67, combined with the fluctuation height data from the measuring dial 73, a correlation analysis is performed on the window's airtightness and pressure resistance failure modes. After testing is complete, the gas distribution box 59 switches to negative pressure mode to recover residual gas, and the elastic damping cylinder 54 resets the load application head 55. The rotating support bearing 72 drives the measuring dial 73 back to zero, releasing the adsorption ring 65. The system then automatically generates a performance report containing the coordinates of the leak point.

Claims

1. A side pressure door and window load force detection device, comprising a detection platform (1), wherein a bearing base (11) is provided on the top of the detection platform (1); a workpiece carrier (12) and a pressing frame (13) mounted on the workpiece carrier (12) are provided on the bearing base (11); a test area (14) is defined between the frame of the pressing frame (13) and the workpiece carrier (12); a linear actuator (15) is installed on the top of the frame of the pressing frame (13), an output end of the linear actuator (15) extends into the test area (14) and is connected to a pressure actuator (16); the device is characterized in that: The table surface of the bearing base (11) is further provided with a pressing mechanism (2), an internal load applying component (5) and an outer frame detection component (6); The pressing mechanism (2) is arranged in front of the workpiece carrier (12) and is fixed by the frame mounting groove (18) on the table of the bearing base (11); the pressing mechanism (2) comprises a first pressing bracket (3) and a second pressing bracket (4); the rear edge line of the workpiece carrier (12) is provided with a reference card frame for positioning the door and window hinge side, and the other side of the door and window is pressed and fixed by the first pressing bracket (3) and the second pressing bracket (4); The internal load applying assembly (5) is arranged on the workpiece carrier (12) plate surface, and its supporting end is used to abut against the inner frame of the door and window; the table side edge of the bearing base (11) is provided with an equipment chamber (17), and the outer frame detection assembly (6) is installed in the equipment chamber (17) and its detection end points to the supporting end of the internal load applying assembly (5); The pressing end of the second pressing bracket (4) covers the support area of ​​the internal load application component (5), and the pressing end is provided with a fluctuation detection component (7); The internal load applying assembly (5) includes a displacement base plate (51) and a forward moving machine box (52) slidably mounted thereon; a guide support rod (57) is provided at the front end of the forward moving machine box (52); a front support plate (53) is mounted at the output end of the guide support rod (57); a plurality of elastic damping cylinders (54) are provided on the front support plate (53); and a load applying head (55) is provided at the end of each elastic damping cylinder (54) for abutting against the gap of the inner frame of the door or window; An exhaust ring (56) is provided at the load applying head (55); a gas distribution box (59) is provided on the displacement base plate (51), and the gas distribution box (59) is connected to the interior of the forward moving machine box (52) through an air supply pipe (58), forming an air path for the air flow ejected by the exhaust ring (56) to impact the gap in the inner frame of the door and window; The outer frame detection assembly (6) comprises a detection mechanism box (61), a lateral support machine box (62) arranged thereon, and an external contact probe (64) mounted on the lateral support machine box (62); a free end of the external contact probe (64) is provided with an adsorption ring (65) for adsorbing the outer frame of the door or window, and the adsorption ring (65) corresponds in position to the load applying head (55) of the internal load applying assembly (5); The lateral support box (62) is provided with a positioning limit slot (63); the external contact probe (64) is inserted into the positioning limit slot (63), and its bottom is mounted on the inner cavity of the lateral support box (62) through a ball hinge, so that the external contact probe (64) can swing within the limited range of the positioning limit slot (63); The bottom of the detection mechanism box (61) is provided with a lower edge support frame (66), and the bottom end of the lower edge support frame (66) is installed with a displacement sensing cylinder (67); the detection end of the displacement sensing cylinder (67) is connected to a contact probe (68), and the contact probe (68) is connected to the rod body of the external contact probe rod (64) through a piston push rod (69); the swing of the external contact probe rod (64) is transmitted to the displacement sensing cylinder (67) through the piston push rod (69), and the fluctuation frequency of the outer frame of the door and window is obtained by detecting the change of air pressure in the cylinder.

2. The side pressure door and window load force detection device according to claim 1, characterized in that: The pressing mechanism (2) comprises a mechanism base plate (21) and a mechanism frame (22) fixed to a notch of a frame mounting slot (18); a linear slide rail (25) and a belt transmission mechanism (23) are provided on the mechanism base plate (21); the first pressing bracket (3) and the second pressing bracket (4) are both mounted on the linear slide rail (25) via a slider (24), and each slider (24) is connected to the belt surface of the belt transmission mechanism (23).

3. The side pressure door and window load force detection device according to claim 2, characterized in that: The first pressing bracket (3) and the second pressing bracket (4) are driven by independent belt transmission mechanisms (23), or are synchronously driven by the same belt transmission mechanism (23).

4. The side pressure door and window load force detection device according to claim 2, characterized in that: The first pressing bracket (3) and the second pressing bracket (4) both comprise: a lifting pusher (31) vertically mounted on a slider (24), a transverse translation pusher (32) mounted on a lifting rod of the lifting pusher (31), a fixed base (33) provided at an output end of the translation pusher (32), and a positioner (34) fixed on the fixed base (33); a pressing track (35) is provided at the pressing end of the positioner (34), and a pressing buckle plate (36) is embedded in the pressing track (35).

5. The side pressure door and window load force detection device according to claim 1, characterized in that: The forward moving machine box (52) is a sealed box body; the guide support rod (57) is a hollow tube body and is inserted into the elastic damping cylinder (54).

6. The side pressure door and window load force detection device according to claim 1, characterized in that: The undulation detection assembly (7) is arranged between the fixed base (33) and the positioner (34) of the second pressing bracket (4); it includes a detection module (71) fixed on the fixed base (33), and the detection module (71) is provided with a rotation support bearing (72) and a measuring turntable (73); the positioner (34) is mounted on the disk surface of the measuring turntable (73), and the shaft of the measuring turntable (73) is passed through the rotation support bearing (72); the rotation support bearing (72) is integrated with an angle displacement detector (74) for detecting the rotation angle of the shaft of the measuring turntable (73).

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