A two-way detection device and method for flatness of a wooden door surface

Abstract

This invention discloses a bidirectional inspection device and method for the surface flatness of wooden doors, relating to the field of wooden door inspection technology. The device includes a bottom guide platform, a top guide platform, a sliding table, a drive roller, a strip plate, an inspection plate, and a lifting unit. The bottom and top guide platforms have bottom and top grooves respectively for positioning the wooden door. The drive roller moves the strip plate and the wooden door, clamping the door with a pressure device. Distance detection modules on both inspection plates enable bidirectional surface inspection. The method of this invention uses the forward and reverse rotation of the drive roller to move the wooden door bidirectionally, completing two bidirectional surface inspections and automatically calibrating the inspection starting point and range. This invention achieves bidirectional surface inspection of wooden doors without manual flipping, offering high inspection efficiency, stable positioning, and suitability for rapid flatness inspection in mass production of wooden doors.

Description

Technical Field

[0001] This invention relates to the field of wooden door testing technology, and in particular to a two-way testing device and method for the surface flatness of wooden doors. Background Technology

[0002] As a core component of interior decoration, the surface flatness of wooden doors directly affects the installation effect and user experience. Currently, there are two main technical challenges in flatness testing during the wooden door manufacturing process:

[0003] Firstly, existing testing methods mostly involve manual handheld ruler or feeler gauge checks or single-sided automated testing. Single-sided testing requires manual flipping of the wooden door to complete the inspection of the other side, which is not only inefficient and difficult to meet the needs of mass production, but also easily scratches the surface of the wooden door during the flipping process, resulting in an increased product defect rate.

[0004] Secondly, the existing testing equipment has poor positioning stability for wooden doors. During the testing process, the wooden doors are prone to displacement and shaking. At the same time, it cannot automatically calibrate the testing starting point and effective testing range, resulting in large errors in the testing data, high rates of missed detections and false detections, and difficulty in ensuring the consistency and reliability of the testing results. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] This invention provides a two-way detection device for the surface flatness of wooden doors, including a bottom guide platform, a top guide platform located directly above the bottom guide platform, and a slide platform horizontally slidably installed on the top guide platform.

[0007] A bottom groove is formed on the upper side of the bottom guide platform, and a top groove is formed on the top guide platform. The bottom end of the wooden door is placed in the bottom groove, and the top end of the wooden door is placed in the top groove. A drive roller is installed in the bottom groove, and the bottom guide platform is also equipped with a motor to drive the drive roller to rotate. A strip plate for supporting the wooden door is positioned and installed on the upper side of the drive roller. The length of the strip plate is greater than the length of the bottom surface of the wooden door. Detection plates and lifting units are set on both sides of the bottom guide platform. The lifting units drive and connect to the detection plates. Multiple distance detection modules are set on the detection plates in the vertical direction. The top of the detection plates extends to the top guide platform. Detection bottom openings are formed on both sides of the bottom guide platform, and detection top openings are formed on both sides of the top guide platform. The detection bottom openings and detection top openings are aligned and fitted with the detection plates. Side slopes are set on both sides of the strip plate to match the horizontal position of the detection bottom openings.

[0008] A pair of pressure-applying components and a photoelectric unit for detecting the wooden door blocking signal and the travel point of the slide table are installed on the bottom side of the slide table. The photoelectric unit is arranged around the pressure-applying components, and the top surface of the top guide table is provided with two signal blocking areas that cooperate with the photoelectric unit.

[0009] Preferably, the drive roller has multiple openings on its ring side, the top side of the strip is provided with a friction plane that abuts against the bottom surface of the wooden door, and the bottom side is provided with multiple raised strips that cooperate with the openings.

[0010] Preferably, a first longitudinal guide frame is provided on both sides of the bottom guide platform below the bottom opening of the detection plate, and the lower end of the detection plate is movably inserted into the position of the first longitudinal guide frame. A second longitudinal guide frame is provided on both sides of the top guide platform above the top opening of the detection plate, and the upper end of the detection plate is movably inserted into the position of the second longitudinal guide frame. The inlet end on one side of the top groove is wide, and several side guide rollers that contact the wooden door are evenly arranged on the inner wall of the top groove.

[0011] Preferably, each lifting unit includes a pair of lifting devices distributed on the same side of the bottom guide platform. The output end of the lifting device is provided with a lifting shaft, and a crossbar is fixedly installed between the two lifting shafts on the same side. The detection plate is provided with an outer plate connected to the crossbar. The lifting shaft and the outer plate are both provided with transverse through holes, and the two ends of the crossbar are provided with threads. The crossbar passes through the transverse through holes of the lifting shaft and the outer plate, and nuts are fastened to both sides of the lifting shaft.

[0012] Preferably, the outward-facing opening dimensions of the bottom and top detection openings are smaller than the width of the wooden door. The height difference between the lower edge of the bottom detection opening and the upper edge of the top detection opening is greater than the vertical height of the wooden door, and the vertical distribution span of the multiple distance detection modules on the detection plate is greater than the vertical height of the wooden door.

[0013] Preferably, the slide table has a sliding hole, and end frames are provided at both ends of the top side of the top guide table. A slide rod passing through the sliding hole is fixedly installed between the two end frames.

[0014] Preferably, the top guide platform has a vertically penetrating groove that runs through the top surface of the top guide platform. The top surface and the groove are vertically connected. The length of the groove is less than the length of the top surface of the top guide platform. Two signal blocking areas are symmetrically distributed on the top surface of the top guide platform where the groove does not extend. The pressure application component includes a telescopic device, a telescopic shaft, and a pressure block installed on the side of the telescopic shaft. The pressure block is movably positioned at the groove location. A friction pad and a pressure sensing probe are embedded in the bottom side of the pressure block.

[0015] Preferably, the photoelectric unit includes a first photoelectric probe distributed on one side of a pair of pressure-applying elements and a second photoelectric probe distributed on the other side of a pair of pressure-applying elements. The first photoelectric probe is matched with one of the signal blocking areas, and the second photoelectric probe is matched with the other signal blocking area.

[0016] This invention provides a two-way detection method for the surface flatness of wooden doors, comprising the following steps:

[0017] Step 1: Place the strip on the upper side of the drive roller, place the bottom side of the wooden door on the strip, and place the top of the wooden door at the inlet end of the top groove.

[0018] Step two: The photoelectric unit detects the signal from the wooden door, the motor starts, drives the drive roller to rotate forward, and drives the wooden door to move forward between the bottom guide platform and the top guide platform.

[0019] Step 3: When the photoelectric unit detects the wooden door, it activates the pressure-applying component, causing it to descend until the downward pressure on the wooden door reaches the preset reference value.

[0020] Step four: Secure the wooden door between the pressure-applying component and the strip, and drive the roller to move the strip, wooden door, pressure-applying component, slide table and photoelectric unit synchronously.

[0021] Step 5: The lifting unit moves the detection plate vertically until a distance detection module in the bottom area of ​​the detection plate detects the side slope of the strip. Then the lifting unit moves the detection plate up until the detection position of the distance detection module just moves upward away from the side slope, which is used as the starting point for detecting the bottom side of the wooden door.

[0022] Step six: The distance detection module that meets the detection range of the wooden door is defined by the detection status of the distance detection module that extends beyond the top of the wooden door. The wooden door passes through the area between the two detection plates, completing the first double-surface inspection of the wooden door.

[0023] Step 7: When the photoelectric unit detects one of the signal blocking areas, the motor drives the drive roller to stop and reverse. At the same time, the lifting unit drives the detection plate to rise by half a detection position. The half detection position is half the distance between adjacent detection modules on the detection plate.

[0024] Step 8: The wooden door is reversed and passes through the area between the two inspection plates to complete the second double-surface inspection of the wooden door.

[0025] Step nine: When the photoelectric unit detects another signal blocking area, the motor drives the drive roller to stop, the pressure component rises, and the wooden door that has completed the test is removed.

[0026] Step 10: When the photoelectric unit fails to detect the wooden door, after a delay of several seconds, the motor drives the drive roller to rotate forward until the photoelectric unit leaves the signal blocking area, allowing the photoelectric unit to return to its initial position and wait for the next wooden door detection.

[0027] Compared with existing technologies, the beneficial effects of this invention are:

[0028] This invention, by symmetrically setting detection plates on both sides of the bottom guide platform, can simultaneously detect two surfaces of the wooden door. With the forward and reverse rotation of the drive roller, the wooden door moves in both directions, completing two cross-detections. The flatness detection of the entire surface of the wooden door can be achieved without manual flipping, which greatly improves the detection efficiency. At the same time, it avoids scratches, bumps and other damage to the surface of the wooden door caused by manual flipping, and reduces the product defect rate.

[0029] This invention employs a dual positioning method combining strip support and pressure clamping, ensuring the stability of the wooden door throughout the inspection process and preventing displacement or collision. Simultaneously, it automatically calibrates the bottom starting point of the inspection by detecting the inclined side of the strip, and automatically defines the effective inspection range by combining the state changes of the top distance detection module. This effectively eliminates errors caused by manual calibration, significantly improving inspection accuracy and the consistency of inspection results, and meeting the rapid, high-precision inspection requirements for mass production of wooden doors. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the detection device of the present invention.

[0031] Figure 2 for Figure 1 A magnified structural diagram of part A in the middle.

[0032] Figure 3 This is a schematic diagram of the bottom guide platform in this invention.

[0033] Figure 4 for Figure 3 A magnified structural diagram of section B in the middle.

[0034] Figure 5 This is a schematic diagram of the structure of the strip in this invention.

[0035] Figure 6 This is a schematic diagram of the top guide platform in this invention.

[0036] Figure 7 This is a schematic diagram of the slide and pressure application components in this invention.

[0037] Figure 8 This is a front view of the detection device of the present invention.

[0038] Figure 9 for Figure 8 A cross-sectional view at the MM position.

[0039] Figure 10 for Figure 9 A magnified structural diagram of part C in the middle.

[0040] Wherein: 1-bottom guide platform; 101-bottom groove; 102-detection bottom opening; 103-first longitudinal guide frame; 2-drive roller; 201-ring opening; 3-strip plate; 301-friction plane; 302-protruding strip; 303-side inclined surface; 4-motor; 5-lifting device; 501-lifting shaft; 502-transverse through hole; 503-crossbar; 6-top guide platform; 601-wide opening; 602-top groove; 603-side guide roller; 604 - Groove; 605 Detection top opening; 606 Second longitudinal guide frame; 607 End frame; 608 Slide rod; 609 Signal obstruction area; 7 Slide table; 701 Telescopic device; 702 Telescopic shaft; 703 Pressure block; 7031 Friction pad; 704 First photoelectric probe; 705 Second photoelectric probe; 706 Sliding hole; 8 Detection plate; 801 Distance detection module; 802 Outer panel; 9 Wooden door. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0042] Example 1: This invention designs a two-way detection device for the surface flatness of wooden doors, combined with... Figure 1 , Figure 8 As shown, it includes a bottom guide platform 1, a top guide platform 6 located directly above the bottom guide platform 1, and a slide 7 horizontally slidably mounted on the top guide platform 6. A bottom groove 101 is formed on the upper side of the bottom guide platform 1, and a top groove 602 is formed on the top guide platform 6. The bottom end of the wooden door 9 is placed in the bottom groove 101 and the top end is placed in the top groove 602, so as to achieve the initial positioning of the wooden door in the vertical direction.

[0043] Combination Figure 3 , Figure 4 , Figure 5 As shown, a drive roller 2 is installed inside the bottom groove 101, and a motor 4 for driving the drive roller 2 to rotate is also provided on the bottom guide platform 1. A strip plate 3 for supporting the wooden door 9 is positioned and installed on the upper side of the drive roller 2. The length of the strip plate 3 is greater than the length of the bottom surface of the wooden door. The long strip plate 3 moves more smoothly on the drive roller 2, avoiding instability of the wooden door due to friction and collision with the drive roller 2 during movement. Multiple ring openings 201 are opened on the circumferential side of the drive roller 2. The top side of the strip plate 3 is provided with a friction surface 301 that abuts against the bottom surface of the wooden door 9, and the bottom side is provided with multiple protrusions 302 that cooperate with the ring openings 201. The synchronous transmission between the strip plate 3 and the drive roller 2 is achieved by the engagement of the protrusions 302 and the ring openings 201, preventing the strip plate 3 from slipping. Side inclined surfaces 303 are provided on both sides of the strip plate 3 to cooperate with the horizontal position of the detection bottom opening 102.

[0044] Combination Figure 1 , Figure 2 , Figure 4 , Figure 10 As shown, both sides of the bottom guide platform 1 are equipped with detection plates 8 and lifting units, with the lifting units driving and connecting the detection plates 8. Multiple distance detection modules 801 are arranged vertically on the detection plates 8, and the top of the detection plates 8 extends to the top guide platform 6. Detection bottom openings 102 are provided on both sides of the bottom guide platform 1, and detection top openings 605 are provided on both sides of the top guide platform 6. The detection bottom openings 102 and 605 are aligned and cooperate with the detection plates 8, providing a detection channel for the detection plates 8. First longitudinal guide frames 103 are provided on both sides of the bottom guide platform 1 below the detection bottom openings 102, and the lower end of the detection plates 8 is movably inserted into the position of the first longitudinal guide frame 103. Second longitudinal guide frames 606 are provided on both sides of the top guide platform 6 above the detection top openings 605, and the upper end of the detection plates 8 is movably inserted into the position of the second longitudinal guide frame 606. The stability of the detection plates 8 during the lifting process is ensured by the first longitudinal guide frames 103 and the second longitudinal guide frames 606. The outward opening size of the detection bottom openings 102 and the detection top openings 605 is smaller than the door width of the wooden door 9. The height difference between the lower edge of the bottom opening 102 and the upper edge of the top opening 605 is greater than the vertical height of the wooden door 9. The distribution span of the multiple distance detection modules 801 of the detection plate 8 in the vertical direction is greater than the vertical height of the wooden door 9, ensuring that the entire detection area of ​​the wooden door can be covered.

[0045] Each lifting unit includes a pair of lifting devices 5 distributed on the same side of the bottom guide platform 1. The output end of the lifting device 5 is provided with a lifting shaft 501. A crossbar 503 is fixedly installed between the two lifting shafts 501 on the same side. The detection plate 8 is provided with an outer plate 802 connected to the crossbar 503. The lifting shafts 501 and the outer plate 802 are both provided with transverse through holes 502. The crossbar 503 is provided with threads on both ends. The crossbar 503 passes through the transverse through holes 502 of the lifting shafts 501 and the outer plate 802 and is fastened with nuts on both sides of the lifting shafts 501, so as to realize the detachable connection between the detection plate 8 and the lifting unit, which facilitates later maintenance and replacement.

[0046] Combination Figure 6 , Figure 7 As shown, the inlet end of the top groove 602 is a wide opening 601, which facilitates the quick insertion of the wooden door 9 into the top groove 602. Several side guide rollers 603 are evenly arranged on the inner wall of the top groove 602 to contact the wooden door 9, reducing frictional resistance during door movement and further limiting horizontal deviation. End brackets 607 are provided at both ends of the top side of the top guide platform 6, and a slide rod 608 passing through a sliding hole 706 is fixedly installed between the two end brackets 607. The slide table 7 has a sliding hole 706, and the horizontal sliding of the slide table 7 on the top guide platform 6 is achieved through the cooperation of the sliding hole 706 and the slide rod 608.

[0047] Combination Figure 7 , Figure 9As shown, the top guide table 6 has a groove 604 that vertically penetrates the top groove 602. The groove 604 extends through the top surface of the top guide table 6, and the top groove 602 and the groove 604 are vertically connected. The length of the groove 604 is less than the length of the top surface of the top guide table 6. Two signal blocking areas 609 are symmetrically distributed on the top surface of the top guide table 6 where the groove 604 does not extend. A pair of pressure-applying components are provided on the bottom side of the slide table 7 for applying pressure to the top surface of the wooden door 9. The pressure-applying components include a telescopic device 701 fixedly installed on the bottom side of the slide table 7, a telescopic shaft 702, and a pressure block 703 installed on the side end of the telescopic shaft 702. The pressure block 703 is movably positioned at the location of the groove 604. A friction pad 7031 is provided on the bottom side of the pressure block 703, and a pressure sensor probe is embedded therein. The friction pad 7031 can prevent the pressure block 703 from scratching the surface of the wooden door. The pressure sensor probe is used to detect the pressure intensity in real time to ensure stable clamping force.

[0048] The bottom side of the slide table 7 is also equipped with a photoelectric unit for detecting the blocking signal of the wooden door 9 and the travel position of the slide table 7. The photoelectric unit is arranged around the pressure application components. The photoelectric unit includes a first photoelectric probe 704 distributed on one side of the pair of pressure application components and a second photoelectric probe 705 distributed on the other side of the pair of pressure application components. The first photoelectric probe 704 corresponds to one of the signal blocking areas 609, and the second photoelectric probe 705 corresponds to the other signal blocking area 609. Through the cooperation of the photoelectric probes and the signal blocking areas 609, the travel of the slide table 7 and the direction of the drive roller 2 are precisely controlled.

[0049] Example 2: The present invention also designs a two-way detection method for the surface flatness of wooden doors, the details of which are as follows:

[0050] Place the strip 3 on the upper side of the drive roller 2, aligning and engaging the protruding strip 302 on the bottom side of the strip 3 with the annular opening 201 of the drive roller 2, thus achieving positioning and transmission between the strip 3 and the drive roller 2. Place the bottom side of the wooden door 9 stably on the friction surface 301 of the strip 3, align the top of the wooden door 9 with and insert it into the inlet end wide opening 601 of the top groove 602. Under the guidance of the guide roller 603 on the inner wall of the top groove 602, the wooden door can smoothly enter the interior of the top groove 602 until the photoelectric probe in the photoelectric unit detects the wooden door signal.

[0051] Then, the motor 4 starts, driving the drive roller 2 to rotate in the forward direction. Through the friction transmission between the raised strip 302 and the ring 201, the drive roller 2 drives the strip 3 and the wooden door 9 placed on it to move forward at a uniform speed along the bottom groove 101 and the top groove 602.

[0052] When the first photoelectric probe 704 and the second photoelectric probe 705 of the photoelectric unit simultaneously detect the wooden door 9, it is determined that the wooden door has reached the detection start position (the initial position of the first photoelectric probe 704 and the second photoelectric probe 705 of the photoelectric unit is directly opposite the groove 604 of the top guide table 6, and is located between the detection top opening 605 and the inlet end of the top groove 602), and then the pressure applying component is activated. The telescopic device 701 of the pressure applying component drives the telescopic shaft 702 to move the pressure applying block 703 downward until the downward pressure detected by the pressure sensing probe embedded in the pressure applying block 703 reaches the preset reference value, at which point the pressure applying component stops operating.

[0053] At this time, the wooden door 9 is stably clamped between the pressure block 703 and the strip 3. The drive roller 2 keeps rotating in the positive direction, driving the strip 3, the wooden door 9, the pressure component, the slide table 7 and the photoelectric unit to move forward synchronously along the slide rod 608.

[0054] The lifting unit's lifting mechanism 5, via the lifting shaft 501 and crossbar 503, drives the detection plate 8 vertically downwards along the first longitudinal guide 103 and the second longitudinal guide 606 until any distance detection module 801 in the bottom area of ​​the detection plate 8 detects the side slope 303 of the strip 3. Then, the lifting unit drives the detection plate 8 slowly upwards until the detection area of ​​the distance detection module 801 that detected the side slope 303 is completely detached from the side slope 303. At this point, the distance detection module 801 is set as the bottom reference starting point for the wooden door flatness detection.

[0055] In addition, the distance detection modules 801 on the detection plate 8 that extend beyond the top of the wooden door 9 will sequentially display a state change of "no valid detection signal - pressure block 703 detected - no valid detection signal". Based on this, the system automatically defines the effective detection module range covering the entire height of the wooden door. When the wooden door 9 passes through the detection area between the two detection plates 8 at a constant speed, all distance detection modules 801 on the two detection plates 8 that are within the effective detection range simultaneously collect distance data on the front and back surfaces of the wooden door, completing the first double-surface flatness detection of the wooden door.

[0056] When the second photoelectric probe 705 of the photoelectric unit moves above the corresponding signal blocking area 609 and detects signal blocking, it is determined that the wooden door has completed the forward full-stroke detection. At this time, the motor 4 immediately stops driving the roller 2 to rotate in the forward direction and switches to reverse rotation. At the same time, the lifting unit drives the detection plate 8 to move vertically upward by half a detection position. Half a detection position is half the center distance between two adjacent distance detection modules 801 on the detection plate 8. By overlapping the detection points, the spacing blind spot of a single row of detection modules is eliminated, further improving the detection accuracy.

[0057] The drive roller 2 rotates in the opposite direction, causing the strip 3, wooden door 9, pressure component, slide table 7 and photoelectric unit to move synchronously in the opposite direction along the slide bar 608. The wooden door 9 passes through the detection area between the two detection plates 8 at a uniform speed again, completing the second misaligned superimposed wooden door double surface flatness detection.

[0058] When the first photoelectric probe 704 of the photoelectric unit moves above another signal blocking area 609 and detects signal blocking, it is determined that the wooden door has completed the reverse full-stroke detection. At this time, the motor 4 stops driving the rotation of the roller 2, and the telescopic device 701 of the pressure component drives the pressure block 703 to rise and reset to the initial position, so that the staff can take out the wooden door that has completed all the detection.

[0059] When the second photoelectric probe 705 of the photoelectric unit fails to detect the signal from the wooden door 9, the system delays for a preset time, and then the motor 4 drives the drive roller 2 to rotate in the forward direction until the first photoelectric probe 704 of the photoelectric unit is completely removed from the signal blocking area 609, so that the photoelectric unit and the slide table 7 are reset to the initial position and the equipment enters the standby state, waiting for the next wooden door detection command.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A two-way detection device for the surface flatness of wooden doors, characterized in that: Includes a bottom guide platform (1), a top guide platform (6) located directly above the bottom guide platform (1), and a slide platform (7) horizontally slidably installed on the top guide platform (6). The bottom guide platform (1) has a bottom groove (101) on its upper side, and the top guide platform (6) has a top groove (602). The bottom end of the wooden door is placed in the bottom groove (101), and the top end of the wooden door is placed in the top groove (602). The bottom groove (101) is equipped with a drive roller (2). The bottom guide platform (1) is also equipped with a motor (4) for driving the drive roller (2) to rotate. The drive roller (2) is positioned and installed with a strip (3) for supporting the wooden door. The length of the strip (3) is greater than the length of the bottom surface of the wooden door. The bottom guide platform (1) is provided with a detection plate (8) and a lifting unit on both sides. The lifting unit drives and connects to the detection plate (8). The detection plate (8) is provided with multiple distance detection modules (801) in the vertical direction. The top of the detection plate (8) extends to the top guide platform (6). The bottom guide platform (1) is provided with detection bottom openings (102) on both sides. The top guide platform (6) is provided with detection top openings (605) on both sides. The detection bottom openings (102) and detection top openings (605) are aligned and cooperate with the detection plate (8). The strip plate (3) is provided with side slopes (303) on both sides that cooperate with the horizontal position of the detection bottom openings (102). The bottom side of the slide (7) is provided with a pair of pressure-applying components and a photoelectric unit for detecting the signal of the wooden door blocking and the travel point of the slide (7). The photoelectric unit is arranged around the pressure-applying components. The top surface of the top guide (6) is provided with two signal blocking areas (609) that cooperate with the photoelectric unit.

2. The bidirectional testing device for the surface flatness of wooden doors according to claim 1, characterized in that: The drive roller (2) has multiple ring openings (201) on its ring side, the top side of the strip (3) is provided with a friction plane (301) that abuts against the bottom surface of the wooden door, and the bottom side of the strip (3) is provided with multiple protruding strips (302) that cooperate with the ring openings (201).

3. The bidirectional testing device for the surface flatness of wooden doors according to claim 1, characterized in that: The bottom guide platform (1) is provided on both sides with a first longitudinal guide frame (103) located below the detection bottom opening (102), and the lower end of the detection plate (8) is movably inserted into the position of the first longitudinal guide frame (103); The top guide platform (6) is provided on both sides above the detection top opening (605) with a second longitudinal guide frame (606) and the upper end of the detection plate (8) is movably inserted into the position of the second longitudinal guide frame (606); The inlet end of the top groove (602) is a wide opening (601), and a number of side guide rollers (603) that contact the wooden door are evenly arranged on the inner wall of the top groove (602).

4. The bidirectional testing device for the surface flatness of wooden doors according to claim 1, characterized in that: Each lifting unit includes a pair of lifting devices (5) distributed on the same side of the bottom guide platform (1). The output end of the lifting device (5) is provided with a lifting shaft (501). A crossbar (503) is fixedly installed between the two lifting shafts (501) on the same side. The detection plate (8) is provided with an outer plate (802) connected to the crossbar (503). The lifting shaft (501) and the outer plate (802) are both provided with transverse through holes (502), the two ends of the crossbar (503) are provided with threads, the crossbar (503) passes through the transverse through holes (502) of the lifting shaft (501) and the outer plate (802) and nuts are fastened on both sides of the lifting shaft (501).

5. The bidirectional testing device for the surface flatness of wooden doors according to claim 1, characterized in that: The outward opening size of the detection bottom opening (102) and the detection top opening (605) is smaller than the door width of the wooden door; The height difference between the lower edge of the detection bottom opening (102) and the upper edge of the detection top opening (605) is greater than the vertical height of the wooden door, and the distribution span of the multiple distance detection modules (801) of the detection plate (8) in the vertical direction is greater than the vertical height of the wooden door.

6. The bidirectional testing device for the surface flatness of wooden doors according to claim 1, characterized in that: The slide table (7) has a sliding hole (706), and the top guide table (6) has end frames (607) at both ends on the top side. A slide rod (608) passing through the sliding hole (706) is fixedly installed between the two end frames (607).

7. The bidirectional testing device for the surface flatness of wooden doors according to claim 1, characterized in that: The top guide platform (6) has a groove (604) that is vertically connected to the top groove (602). The groove (604) penetrates the top surface of the top guide platform (6). The top groove (602) and the groove (604) are vertically connected. The length of the groove (604) is less than the length of the top surface of the top guide platform (6). Two signal blocking areas (609) are symmetrically distributed on the top surface of the top guide platform (6) where the groove (604) does not extend. The pressure-applying component includes a telescopic device (701) fixedly installed on the bottom side of the slide (7), a telescopic shaft (702), and a pressure-applying block (703) installed on the side end of the telescopic shaft (702). The pressure-applying block (703) is movably configured at the position of the groove (604). A friction pad (7031) is provided on the bottom side of the pressure-applying block (703) and a pressure sensing probe is embedded therein.

8. The bidirectional testing device for the surface flatness of wooden doors according to claim 1, characterized in that: The photoelectric unit includes a first photoelectric probe (704) distributed on one side of a pair of pressure-applying components and a second photoelectric probe (705) distributed on the other side of a pair of pressure-applying components. The first photoelectric probe (704) is correspondingly engaged with one of the signal blocking areas (609), and the second photoelectric probe (705) is correspondingly engaged with the other signal blocking area (609). 9.A wood door surface flatness bidirectional detection method, applied to the wood door surface flatness bidirectional detection device of any one of claims 1 to 8, characterized in that, Includes the following steps: S1. Place the strip (3) on the upper side of the drive roller (2), place the bottom side of the wooden door on the strip (3), and place the top of the wooden door at the inlet end of the top groove (602); S2. The photoelectric unit detects the signal of the wooden door, the motor (4) starts, drives the drive roller (2) to rotate forward, and drives the wooden door to move forward between the bottom guide platform (1) and the top guide platform (6); S3. When the photoelectric unit detects the wooden door, it activates the pressure-applying component, causing the component to descend until the downward pressure on the wooden door reaches the preset reference value. S4. The wooden door is stably clamped between the pressure component and the strip (3), and the drive roller (2) drives the strip (3), the wooden door, the pressure component, the slide (7) and the photoelectric unit to move synchronously. S5. The lifting unit drives the detection plate (8) to move vertically until a distance detection module (801) in the bottom area of ​​the detection plate (8) detects the side slope (303) of the strip (3). Then the lifting unit drives the detection plate (8) to move upward until the detection position of the distance detection module (801) just moves upward away from the side slope (303), which serves as the starting point for detecting the bottom side of the wooden door. S6. The distance detection module (801) that exceeds the top of the wooden door defines the distance detection module (801) that meets the detection range of the wooden door. The wooden door passes through the area between the two detection plates (8) to complete the first double surface detection of the wooden door. S7. When the photoelectric unit detects one of the signal blocking areas (609), the motor (4) drives the drive roller (2) to stop and reverse. At the same time, the lifting unit drives the detection plate (8) to rise by half a detection position. The half detection position is half the distance between adjacent distance detection modules (801) on the detection plate (8). S8. The wooden door passes through the area between the two detection plates (8) in reverse to complete the second double-surface inspection of the wooden door; S9. When the photoelectric unit detects another signal blocking area (609), the motor (4) drives the drive roller (2) to stop, the pressure component rises, and the wooden door that has completed the detection is taken out; S10. When the photoelectric unit fails to detect the wooden door, after a delay of several seconds, the motor (4) drives the drive roller (2) to rotate forward until the photoelectric unit leaves the signal blocking area (609), so that the photoelectric unit returns to its initial position and waits for the next wooden door detection.

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