Solid wood door flatness detection device
By measuring the displacement and pressure changes of solid wood doors in real time and generating evaluation coefficients, the problems of low efficiency and unstable accuracy of traditional manual inspection are solved, and efficient and accurate flatness inspection and quality management are achieved.
Patent Information
- Application Number
- CN202510928248.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-07
- Publication Date
- 2025-11-14
AI Technical Summary
Traditional solid wood door flatness testing relies on manual measurement, which is inefficient, has unstable accuracy, and makes it difficult to achieve efficient and accurate testing.
The displacement acquisition module and pressure acquisition module are used to measure the vertical displacement and contact pressure change of the probe in real time. The displacement fluctuation coefficient and pressure change coefficient are generated by the central processor, and the evaluation coefficient is generated by comprehensive analysis and compared with the preset threshold to determine the flatness.
It enables efficient and accurate detection of the flatness of solid wood doors, provides data-driven test results, supports quality control and improvement, and enhances the quality management level of enterprises.
Smart Images
Figure CN120947559A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of wooden door testing technology, and in particular to a device for testing the flatness of solid wood doors. Background Technology
[0002] Solid wood doors refer to wooden doors made of natural logs or engineered solid wood. The main manufacturing process of solid wood doors includes material selection, cutting, gluing, planing, carving, and painting. First, the wood is selected and air-dried naturally. Then, it is cut and glued according to the size and specifications of the door. Next, the glued boards are planed. Finally, the wood is painted to achieve the desired color effect and anti-corrosion function.
[0003] After polishing the wood and painting the door, it is necessary to check the flatness of the door. Especially after painting and before delivery, a detailed inspection of the paint surface is required to detect any unevenness or burrs caused by accidents during the painting process. Traditional flatness inspection of solid wood doors often relies on manual measurement using simple tools such as straightedges and feeler gauges. This method has problems such as low efficiency, strong subjectivity, and unstable measurement accuracy. Summary of the Invention
[0004] Based on the technical problems existing in the prior art, the present invention proposes a device for detecting the flatness of solid wood doors.
[0005] This invention proposes a device for detecting the flatness of solid wood doors, comprising a frame and a mounting plate. Multiple evenly distributed conveyor rollers are rotatably connected to the frame. One end of each conveyor roller passes through the frame and is fixedly fitted with two pulleys. Two pulleys in the same group are connected by a belt, with adjacent belts staggered. A motor is fixedly connected to the side of the frame, and the output shaft of the motor is fixedly connected to the end of a corresponding conveyor roller. The mounting plate has multiple sets of circular holes, into which probes are inserted. The device also includes: a displacement acquisition module, mounted on the probe, for real-time measurement of the vertical displacement of the probe and generation of a displacement fluctuation coefficient via a central processing unit in the control panel; and a pressure acquisition module, mounted on the bottom of the probe, for real-time detection of pressure changes when the probe contacts the door panel and generation of a displacement fluctuation coefficient via a central processing unit in the control panel. The central processing unit generates a pressure variation coefficient. The door panel is placed onto the conveyor rollers, and then motor one is started. The output shaft of motor one drives one of the conveyor rollers to rotate. Then, through the transmission of pulleys and belts, multiple conveyor rollers are driven to rotate simultaneously, conveying the door panel at equal distances. When the door panel moves at the bottom of the probe, the displacement acquisition module measures the vertical displacement of the probe and generates a displacement fluctuation coefficient. The pressure acquisition module detects the pressure change when the probe contacts the door panel and generates a pressure variation coefficient. The central processing unit performs a comprehensive analysis of the generated displacement fluctuation coefficient and pressure variation coefficient to generate an evaluation coefficient. The evaluation coefficient is compared with a pre-set evaluation coefficient reference threshold, and the test area is judged to be qualified based on the comparison result, thereby realizing the flatness detection of the door panel.
[0006] Preferably, a guide sleeve is provided at the edge of the tip of the probe, and multiple guide rods are fixedly connected to the top of the mounting plate, with the guide sleeve fitted onto the corresponding guide rod; thus, the probe can be vertically limited by the cooperation between the guide rod and the guide sleeve.
[0007] Preferably, a U-shaped plate is fixedly connected to the frame, a control panel is installed on the side of the U-shaped plate, a second motor is fixedly connected to the top of the U-shaped plate, a stud passing through the U-shaped plate is fixedly connected to the output shaft of the second motor, and a horizontal plate that forms a sliding connection with the U-shaped plate is threaded onto the stud. A mounting plate is connected below the horizontal plate. First, the second motor drives the stud to rotate, causing the horizontal plate to move the mounting plate to a position higher than the door panel. Then, when the door panel moves to a position below the mounting plate, the second motor drives the mounting plate to move downwards until the mounting plate is located in the middle of the probe. At this time, the probe falls naturally on the door panel. When there is a defect on the surface of the door panel, the probe will move up and down accordingly to detect the defect.
[0008] Preferably, a motor and a bearing seat are fixedly connected to the bottom of the horizontal plate. A screw is fixedly connected to the output shaft of the motor, and the other end of the screw is connected to the bearing seat. A sliding connection is formed between the mounting plate and the horizontal plate, and a threaded connection is formed between the mounting plate and the screw. The output shaft of the motor drives the screw to rotate, and then the screw drives the mounting plate to move laterally. In this way, the probe can move along the width direction of the door panel, thereby realizing zoned detection. When the door panel is transported to the next position, the same operation process is repeated until the door panel is fully inspected.
[0009] Preferably, the output and input terminals of the displacement acquisition module and the output and input terminals of the pressure acquisition module are electrically connected to the input and output terminals of the central processing unit, respectively, and the central processing unit is integrated inside the control panel.
[0010] Preferably, the execution steps for the central processing unit to determine whether the detection area is qualified based on the comparison results are as follows:
[0011] Real-time detection: The pressure acquisition module collects the pressure changes when the probe contacts the door panel in real time; the displacement acquisition module collects the vertical displacement of the probe.
[0012] Coefficient Calculation: The central processing unit calculates the displacement fluctuation coefficient, pressure change coefficient, and evaluation coefficient;
[0013] Threshold judgment: If or The local area is deemed unqualified; if The entire board is deemed unqualified.
[0014] Preferably, the generation logic of the displacement fluctuation coefficient is as follows:
[0015] S1. Obtain the actual displacement Δh of each probe as it moves across the door panel surface using the displacement acquisition module. i Let i = 1, 2, 3, 4, ..., n, where n is a positive integer. Then calculate the average value of all probe displacements. Then, the standard deviation of the displacement is calculated to reflect the dispersion of the data, and then the standard deviation is amplified by an exponential function.
[0016] S2, the expression for calculation is:
[0017]
[0018] In the formula, n is the total number of probes.
[0019] Preferably, the logic for generating the pressure change coefficient is as follows:
[0020] S1. Obtain the actual pressure value F of each probe as it moves across the door panel surface using the pressure acquisition module. iLet i = 1, 2, 3, 4, ..., n, where n is a positive integer, and F is the default value. 基线 For the typical pressure value of the door panel in an ideal flat area, calculate the sum of the absolute deviations of the pressure of each probe from the baseline value, and then normalize the total deviation to the percentage of the baseline pressure to eliminate the influence of dimensions.
[0021] S2, the expression for calculation is:
[0022]
[0023] In the formula, n is the total number of probes.
[0024] Preferably, the formulaic analysis performed by the central processing unit is based on the following formula:
[0025]
[0026] D 综合 The evaluation coefficients are δ and γ, which are preset weighting coefficients for pressure and displacement.
[0027] Compared with the prior art, the present invention provides a device for detecting the flatness of solid wood doors, which has the following beneficial effects:
[0028] 1. A device for detecting the flatness of solid wood doors, comprising a displacement acquisition module for real-time measurement of the vertical displacement of a probe to generate a displacement fluctuation coefficient, and a pressure acquisition module for detecting the pressure change when the probe contacts the door panel to generate a pressure change coefficient. A central processing unit performs comprehensive analysis on these two coefficients to generate an evaluation coefficient. The evaluation coefficient is compared with a pre-set reference threshold, and the device determines whether the tested area is qualified based on the comparison result, thereby achieving the flatness detection of the door panel.
[0029] 2. A solid wood door flatness testing device, wherein the central processing unit performs formulaic analysis and processing on the collected data, generates specific evaluation coefficients, and compares them with preset reference thresholds to determine whether the tested area is qualified in a data-driven manner. This data-driven testing result facilitates quality control and traceability for manufacturing enterprises, provides accurate data support for product quality improvement, and helps improve the enterprise's quality management level. Attached Figure Description
[0030] Figure 1 This is a schematic diagram of the overall structure of a solid wood door flatness detection device proposed in this invention;
[0031] Figure 2 This is a schematic diagram of the bottom structure of the mounting plate of the solid wood door flatness detection device proposed in this invention;
[0032] Figure 3 This is a schematic diagram of the mounting plate structure of a solid wood door flatness detection device proposed in this invention;
[0033] Figure 4 This is a schematic diagram of the installation structure between the mounting plate and the U-shaped plate of the solid wood door flatness detection device proposed in this invention.
[0034] Figure 5 This is a schematic diagram of the structure of a solid wood door flatness detection device proposed in this invention.
[0035] In the diagram: 1. Frame; 2. Conveyor roller; 3. Pulley; 4. Belt; 5. Motor 1; 6. Mounting plate; 7. Circular hole; 8. Probe; 9. Displacement acquisition module; 10. Pressure acquisition module; 11. Control panel; 12. Guide rod; 13. Guide sleeve; 14. Motor 2; 15. Horizontal plate; 16. Stud; 17. Motor 3; 18. Screw; 19. Bearing seat; 20. U-shaped plate. Detailed Implementation
[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.
[0037] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0038] Reference Figures 1-5 A device for detecting the flatness of solid wood doors includes a frame 1 and a mounting plate 6. Multiple evenly distributed conveyor rollers 2 are rotatably connected to the frame 1. One end of each conveyor roller 2 passes through the frame 1 and is fixedly fitted with two pulleys 3. Two pulleys 3 in the same group are connected by belts 4, with adjacent belts 4 staggered. A motor 5 is fixedly connected to the side of the frame 1. The output shaft of the motor 5 is fixedly connected to the end of a corresponding conveyor roller 2. The mounting plate 6 has multiple sets of circular holes 7, and probes 8 are inserted into the circular holes 7. The device also includes:
[0039] The displacement acquisition module 9 is installed on the probe 8 and is used to measure the vertical displacement of the probe 8 in real time, and generate the displacement fluctuation coefficient through the central processing unit in the control panel 11.
[0040] The pressure acquisition module 10 is installed at the bottom of the probe 8 to detect the pressure change when the probe 8 contacts the door panel in real time, and generates the pressure change coefficient through the central processing unit.
[0041] It should be noted that the displacement acquisition module 9 can be a displacement sensor or other device that can measure the vertical displacement of the probe 8 in real time, and the pressure acquisition module 10 can be a pressure sensor or other device that can detect the pressure change when the probe 8 contacts the door panel in real time. Therefore, the displacement acquisition module 9 and the pressure acquisition module 10 are not specifically limited here, and can be selected according to actual needs.
[0042] In use, the door panel is placed on the conveyor roller 2, and then the motor 5 is started. The output shaft of the motor 5 drives one of the conveyor rollers 2 to rotate. Then, through the transmission of the pulley 3 and the belt 4, multiple conveyor rollers 2 are driven to rotate simultaneously, conveying the door panel at equal distances. When the door panel moves at the bottom of the probe 8, the displacement acquisition module 9 measures the vertical displacement of the probe 8 and generates a displacement fluctuation coefficient. The pressure acquisition module 10 detects the pressure change when the probe 8 contacts the door panel and generates a pressure change coefficient. The central processing unit performs a comprehensive analysis of the generated displacement fluctuation coefficient and pressure change coefficient to generate an evaluation coefficient. The evaluation coefficient is compared with a pre-set evaluation coefficient reference threshold, and the test area is judged to be qualified based on the comparison result, thereby realizing the flatness detection of the door panel.
[0043] Among them, the edge of the probe 8 is provided with a guide sleeve 13, and multiple guide rods 12 are fixedly connected to the top of the mounting plate 6, with the guide sleeve 13 sleeved on the corresponding guide rod 12.
[0044] In use, the probe 8 can be vertically limited by the cooperation between the guide rod 12 and the guide sleeve 13.
[0045] Among them, a U-shaped plate 20 is fixedly connected to the frame 1, the control panel 11 is installed on the side of the U-shaped plate 20, a motor 2 14 is fixedly connected to the top of the U-shaped plate 20, a stud 16 passing through the U-shaped plate 20 is fixedly connected to the output shaft of the motor 2 14, and a horizontal plate 15 that forms a sliding connection with the U-shaped plate 20 is threaded on the stud 16, and a mounting plate 6 is connected below the horizontal plate 15.
[0046] In use, the stud 16 is first driven to rotate by motor 2 14, which causes the horizontal plate 15 to move the mounting plate 6 to a position higher than the door panel. Then, when the door panel moves to a position below the mounting plate 6, the mounting plate 6 is driven to move downward by motor 2 14 until the mounting plate 6 is in the middle position of the probe 8. At this time, the probe 8 will fall naturally on the door panel. When there is a defect on the surface of the door panel, the probe 8 will move up and down accordingly to detect the defect.
[0047] Among them, the bottom of the horizontal plate 15 is fixedly connected to the motor 17 and the bearing seat 19. The output shaft of the motor 17 is fixedly connected to the screw 18. The other end of the screw 18 is connected to the bearing seat 19. The mounting plate 6 and the horizontal plate 15 form a sliding connection and a threaded connection with the screw 18.
[0048] In use, the output shaft of motor 17 drives screw 18 to rotate, and screw 18 then drives mounting plate 6 to move laterally. In this way, probe 8 can move along the width of the door panel, thereby realizing zone detection. When the door panel is transported to the next position, the same operation process is repeated until the door panel is fully detected.
[0049] The output and input terminals of the displacement acquisition module 9 and the output and input terminals of the pressure acquisition module 10 are electrically connected to the input and output terminals of the central processing unit, which is integrated inside the control panel 11.
[0050] In another embodiment, through the cooperation of the displacement acquisition module 9, the pressure acquisition module 10, and the central processing unit, the central processing unit comprehensively analyzes the generated displacement fluctuation coefficient and pressure change coefficient to generate an evaluation coefficient. The evaluation coefficient is then compared with a pre-set evaluation coefficient reference threshold, and the specific execution steps for determining whether the detection area is qualified based on the comparison result are as follows:
[0051] Real-time detection: Pressure acquisition module 10 acquires the pressure change when probe 8 contacts the door panel in real time; displacement acquisition module 9 acquires the vertical displacement of probe 8;
[0052] Coefficient Calculation: The central processing unit calculates the displacement fluctuation coefficient.
[0053] Among them, the displacement fluctuation coefficient is the degree of fluctuation of the vertical displacement of the probe 8 during the detection process when the probe 8 moves on the door panel surface. The larger the value, the more serious the unevenness or burr problem on the door panel surface.
[0054] The generation logic of the displacement fluctuation coefficient is as follows:
[0055] S1. Obtain the actual displacement Δh of each probe 8 as it moves on the door panel surface using the displacement acquisition module 9. i Let i = 1, 2, 3, 4, ..., n, where n is a positive integer. Then calculate the average displacement of all 8 probes. Then, the standard deviation of the displacement is calculated to reflect the dispersion of the data, and then the standard deviation is amplified by an exponential function.
[0056] S2, the expression for calculation is:
[0057]
[0058] In the formula, n represents the total number of probes (8).
[0059] Calculate the pressure variation coefficient:
[0060] Among them, the pressure change coefficient is used to quantify the changing trend of the contact pressure between the probe 8 and the door panel when the probe 8 moves on the door panel surface. The larger the value, the more uneven the hardness of the paint surface or the existence of hidden defects (such as internal hollowness).
[0061] The logic for generating the pressure variation coefficient is as follows:
[0062] S1. Obtain the actual pressure value F of each probe 8 as it moves on the door panel surface through the pressure acquisition module 10. i Let i = 1, 2, 3, 4, ..., n, where n is a positive integer, and F is the default value. 基线 To determine the typical pressure value of the door panel in an ideal flat area, calculate the sum of the absolute deviations of the pressure of each probe 8 from the baseline value, and then normalize the total deviation to the percentage of the baseline pressure to eliminate the influence of dimensions.
[0063] S2, the expression for calculation is:
[0064]
[0065] In the formula, n is the total number of probes (8).
[0066] Calculate the evaluation coefficient:
[0067] Formulaic analysis is performed using a central processing unit, based on the following formula:
[0068]
[0069] D 综合 The evaluation coefficients are δ and γ, which are preset weighting coefficients for pressure and displacement.
[0070] Threshold judgment: If or The local area is deemed unqualified; if The entire board is deemed unqualified.
[0071] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A device for detecting the flatness of solid wood doors, comprising a frame (1) and a mounting plate (6), characterized in that, The frame (1) is rotatably connected to multiple evenly distributed conveyor rollers (2). One end of each conveyor roller (2) passes through the frame (1) and is fixedly fitted with two pulleys (3). The two pulleys (3) in the same group are connected by belts (4). The two adjacent belts (4) are staggered. A motor (5) is fixedly connected to the side of the frame (1). The output shaft of the motor (5) is fixedly connected to the end of a corresponding conveyor roller (2). The mounting plate (6) has multiple sets of circular holes (7). A probe (8) is inserted into the circular holes (7). The system also includes: The displacement acquisition module (9) is installed on the probe (8) to measure the vertical displacement of the probe (8) in real time and generate the displacement fluctuation coefficient through the central processor in the control panel (11). The pressure acquisition module (10) is installed at the bottom of the probe (8) to detect the pressure change when the probe (8) contacts the door panel in real time, and generates the pressure change coefficient through the central processing unit. The central processing unit comprehensively analyzes the generated displacement fluctuation coefficient and pressure change coefficient to generate an evaluation coefficient. The evaluation coefficient is then compared with a pre-set evaluation coefficient reference threshold, and the test area is judged to be qualified based on the comparison result, thereby realizing the flatness detection of the door panel.
2. The solid wood door flatness testing device according to claim 1, characterized in that, The probe (8) has a guide sleeve (13) at the edge of its tip. The mounting plate (6) has multiple guide rods (12) fixedly connected to its top. The guide sleeve (13) is fitted onto the corresponding guide rod (12).
3. The solid wood door flatness testing device according to claim 1, characterized in that, A U-shaped plate (20) is fixedly connected to the frame (1). A control panel (11) is installed on the side of the U-shaped plate (20). A motor (14) is fixedly connected to the top of the U-shaped plate (20). A stud (16) passing through the U-shaped plate (20) is fixedly connected to the output shaft of the motor (14). A horizontal plate (15) that forms a sliding connection with the U-shaped plate (20) is threaded onto the stud (16). A mounting plate (6) is connected below the horizontal plate (15).
4. The solid wood door flatness testing device according to claim 3, characterized in that, The bottom of the horizontal plate (15) is fixedly connected to a motor (17) and a bearing seat (19). The output shaft of the motor (17) is fixedly connected to a screw (18). The other end of the screw (18) is connected to the bearing seat (19). The mounting plate (6) and the horizontal plate (15) form a sliding connection and a threaded connection with the screw (18).
5. The solid wood door flatness testing device according to claim 1, characterized in that, The output and input terminals of the displacement acquisition module (9) and the output and input terminals of the pressure acquisition module (10) are electrically connected to the input and output terminals of the central processing unit, respectively. The central processing unit is integrated inside the control panel (11).
6. The solid wood door flatness testing device according to claim 1, characterized in that, The central processing unit executes the following steps to determine whether the detection area is qualified based on the comparison results: Real-time detection: The pressure acquisition module (10) acquires the pressure change when the probe (8) contacts the door panel; the displacement acquisition module (9) acquires the vertical displacement of the probe (8); Coefficient Calculation: The central processing unit calculates the displacement fluctuation coefficient, pressure change coefficient, and evaluation coefficient; Threshold judgment: If or The local area is deemed unqualified; if The entire board is deemed unqualified.
7. The solid wood door flatness testing device according to claim 1, characterized in that, The generation logic of the displacement fluctuation coefficient is as follows: S1. Obtain the actual displacement Δh of each probe (8) as it moves on the door panel surface through the displacement acquisition module (9). i i = 1, 2, 3, 4, ..., n, where n is a positive integer. Then calculate the average value of the displacement of all probes (8). Then, the standard deviation of the displacement is calculated to reflect the dispersion of the data, and then the standard deviation is amplified by an exponential function. S2, the expression for calculation is: In the formula, n is the total number of probes (8).
8. The solid wood door flatness testing device according to claim 7, characterized in that, The logic for generating the pressure change coefficient is as follows: S1. Obtain the actual pressure value F of each probe (8) as it moves on the door panel surface through the pressure acquisition module (10). i Let i = 1, 2, 3, 4, ..., n, where n is a positive integer, and F is the default value. 基线 To determine the typical pressure value of the door panel in an ideal flat area, calculate the sum of the absolute deviations between the pressure of each probe (8) and the baseline value, and then normalize the total deviation to the percentage of the baseline pressure to eliminate the influence of dimensions. S2, the expression for calculation is: In the formula, n is the total number of probes (8).
9. The solid wood door flatness testing device according to claim 8, characterized in that, The process involves formulaic analysis performed by the central processing unit, based on the following formula: The evaluation coefficients are δ and γ, which are preset weighting coefficients for pressure and displacement.