Detection device for detecting bridge construction pavement flatness

Abstract

The invention relates to the technical field of bridge construction equipment, in particular to a detection device for detecting bridge construction pavement flatness, which comprises a fixed plate, a lifting box, a detection mechanism and a lifting mechanism, a plurality of mounting grooves are formed in the lifting box; the detection mechanism comprises a signal conversion structure and a lifting trigger mechanism, the signal conversion structure comprises a touch screen and a touch pen, a pen point of the touch pen abuts against the touch screen, the lifting trigger mechanism comprises a cover plate, a lifting rod, a motion conversion structure and a reset structure, and the lifting rod perpendicularly penetrates through the cover plate and is movably connected with the cover plate. The motion conversion structure is used for converting vertical motion of the lifting rod into rotation of the touch pen around the lifting rod, and the reset structure is used for providing downward thrust for the lifting rod; the lifting mechanism is used for adjusting the height of the lifting box; according to the invention, the lifting box, the detection mechanism and the lifting mechanism are arranged, so that error loss of signal transmission in an indirect detection mode is avoided, and the accuracy of signal detection is greatly improved.

Description

Technical Field

[0001] This invention application relates to the field of bridge construction equipment technology, specifically to a detection device for detecting the smoothness of road surfaces during bridge construction. Background Technology

[0002] In bridge construction, road surface smoothness is one of the core indicators for measuring construction quality, directly affecting the bridge's load-bearing capacity, service life, and traffic safety and comfort. With the increasing traffic volume and ever-increasing requirements for engineering quality, higher standards have been set for the accuracy, efficiency, and comprehensiveness of road surface smoothness testing in bridge construction.

[0003] Patent CN114427822B discloses an integrated device for testing road surface smoothness in bridge construction. In this device, the testing mechanism makes rolling contact with the road surface through rollers at the bottom of the piston box. When the road surface is uneven, the rollers drive the piston rod and piston plate to move up and down, drawing in outside air and delivering it to the reaction chamber, where it reacts with pre-injected nitric oxide to generate reddish-brown nitrogen dioxide.

[0004] While the aforementioned scheme uses color sensors to detect the color intensity of the gas inside the reaction chamber, indirectly determining the amount of oxygen entering the chamber and thus reflecting road surface smoothness, its multi-stage indirect detection logic—comprising roller rolling, gas delivery, chemical reaction, and color recognition—is prone to error loss during signal transmission. Firstly, factors such as gas mixing uniformity and flow control accuracy can affect the stability of the chemical reaction, leading to deviations in the correlation between color changes and oxygen levels. Secondly, the color sensor's detection results are easily affected by external factors such as ambient light and sensor aging, making it impossible to accurately capture subtle changes in oxygen levels caused by minor road surface undulations. This indirect detection method results in a less direct correlation between road surface smoothness and the detection signal, making it difficult to accurately quantify the degree of road surface undulation and ultimately affecting the accuracy of construction quality assessment. Summary of the Invention

[0005] To address the aforementioned issues, a detection device for testing the smoothness of road surfaces during bridge construction is provided. By incorporating a lifting box, a detection mechanism, and a lifting mechanism, the device avoids signal transmission errors and losses associated with indirect detection methods, thereby significantly improving the accuracy of the detection signal.

[0006] To address the problems of existing technologies, this invention provides a detection device for testing the smoothness of bridge construction road surfaces, comprising a fixed plate, a lifting box, a detection mechanism, and a lifting mechanism; the fixed plate is connected to a traveling device; the lifting box is arranged parallel to the fixed plate, and multiple mounting slots are provided on the lifting box; multiple detection mechanisms are provided, each of which is disposed in a mounting slot, and each detection mechanism includes a signal conversion structure and a lifting trigger mechanism. The signal conversion structure includes a touch screen and a stylus, with the touch screen horizontally positioned above the mounting slot and the stylus vertically positioned below the touch screen, with the stylus tip abutting against the touch screen; the lifting trigger mechanism includes a cover plate, a lifting rod, a motion conversion structure, and a reset structure; the cover plate covers the bottom of the mounting slot, the lifting rod passes vertically through the cover plate and is movably connected to the cover plate, the motion conversion structure connects the upper end of the lifting rod and the stylus, and is used to convert the vertical movement of the lifting rod into the rotation of the stylus around the lifting rod, and the reset structure is used to provide a downward thrust to the lifting rod; the lifting mechanism is used to adjust the height of the lifting box.

[0007] Preferably, the motion conversion structure includes a sleeve and a transmission rod; the side wall of the sleeve is provided with a groove; one end of the transmission rod is connected to the lifting rod, and the other end of the transmission rod is slidably disposed in the groove, so that the transmission rod drives the sleeve and the stylus to rotate in a directional manner through the trajectory guidance of the groove.

[0008] Preferably, the lifting triggering mechanism further includes an axial limiting structure, which includes a limiting sleeve and a limiting block; the limiting sleeve is coaxially sleeved on the outside of the lifting rod; the limiting block is used to limit the movement of the lifting rod along its own axis.

[0009] Preferably, the side wall of the lifting rod is provided with a sliding groove along its own axis, and the sliding groove is slidably adapted to the limiting block of the axial limiting structure.

[0010] Preferably, the reset structure includes a fixed ring and a spring; the fixed ring is fixedly connected to the lifting rod; the spring is sleeved on the lifting rod, and the two ends of the spring are respectively connected to the fixed ring and the cover plate.

[0011] Preferably, the lifting triggering mechanism further includes a rolling structure, which is located at the lower end of the lifting rod and is used to roll into contact with the road surface to reduce friction during the detection process.

[0012] Preferably, the motion conversion structure further includes an axis limiting seat, which is sleeved on the outside of the sleeve, and the axis limiting seat is connected to both ends of the sleeve by bearings.

[0013] Preferably, the lifting mechanism includes a lifting drive and a connecting plate; the lifting drive is mounted on the fixed plate; the connecting plate is used to connect the lifting drive and the lifting box.

[0014] Preferably, the lifting mechanism further includes multiple guide components, which are used to limit the direction of movement of the lifting box.

[0015] Preferably, the upper end of the lifting box is provided with a protective structure to protect the touch screen from damage by dust, impact and debris in the construction environment.

[0016] The advantages of this invention application compared to the prior art are: 1. This invention application sets up a lifting box, a detection mechanism, and a lifting mechanism. The staggered arrangement of the mounting slots on the lifting box, in conjunction with multiple independent detection mechanisms, forms a uniformly covered road surface detection network, completely avoiding detection blind spots and achieving comprehensive detection of bridge road surfaces. This avoids missing any road section's flatness issues. The motion conversion structure in the detection mechanism converts the vertical displacement of the lifting rod into the directional rotational motion of the stylus. Combined with the signal conversion structure, the three states of the road surface—horizontal, concave, and convex—correspond to three clear signal forms: a straight line, a counterclockwise arc, and a clockwise arc, respectively. The road surface state and the detection signal form a clear correspondence, allowing for quick judgment of the road surface condition without complex interpretation. This avoids the error loss in signal transmission in indirect detection methods and significantly improves the accuracy of the detection signal.

[0017] 2. This invention application includes a sleeve and a transmission rod. The three-section groove on the side wall of the sleeve clearly delineates the movement area of ​​the transmission rod under different road surface conditions, providing clear guidance for the sliding of the transmission rod. The upward movement of the lifting rod caused by the convexity of the road surface is transformed into the transmission rod sliding into the first groove, thereby driving the sleeve and stylus to rotate clockwise. The downward movement of the lifting rod caused by the concaveness of the road surface is transformed into the transmission rod sliding into the third groove, driving the sleeve and stylus to rotate counterclockwise. This achieves a directional correspondence of "convexity - clockwise rotation" and "concaveness - counterclockwise rotation", thereby realizing a unique mapping relationship between the rotation direction of the stylus and the undulation of the road surface, improving the recognition of the detection signal.

[0018] 3. This invention application sets up an axial limiting structure, in which the limiting sleeve and the limiting block of the axial limiting structure cooperate with each other to form an effective constraint on the circumferential rotation of the lifting rod, thereby realizing the restriction on the circumferential rotation of the lifting rod and forcing the lifting rod to only make pure vertical lifting and lowering movements along its own axis. Attached Figure Description

[0019] Figure 1 This is a perspective view of a testing device for detecting the smoothness of road surfaces during bridge construction, as described in this invention application.

[0020] Figure 2 This is a perspective view of the lifting box, signal conversion structure, and lifting triggering mechanism in a testing device for detecting the smoothness of road surface during bridge construction, as described in this invention application.

[0021] Figure 3This is a perspective view of the touch screen, stylus, cover plate, lifting rod, motion conversion structure, reset structure, axial restriction structure, and rolling structure in a testing device for detecting the smoothness of road surface during bridge construction, as described in this invention application.

[0022] Figure 4 This is a perspective view of the lifting rod, sleeve, transmission rod, and stylus in a testing device for detecting the smoothness of road surface during bridge construction, as described in this invention application.

[0023] Figure 5 This is a perspective view of the sleeve in a testing device for detecting the smoothness of road surface during bridge construction, as described in this invention application.

[0024] Figure 6 This is an exploded view of the lifting rod, limiting sleeve, and limiting block in a testing device for detecting the smoothness of road surface during bridge construction, as described in this invention application.

[0025] Figure 7 This is a perspective view of the cover plate, lifting rod, and reset structure in a testing device for detecting the smoothness of road surface during bridge construction, as described in this invention application.

[0026] Figure 8 This is a perspective view of the lifting rod and rolling structure in a testing device for detecting the smoothness of road surface during bridge construction, as described in this invention application.

[0027] Figure 9 This is an exploded view of the sleeve and axis limiting seat in a testing device for detecting the smoothness of road surface during bridge construction, as described in this invention application.

[0028] Figure 10 This is a perspective view of the lifting box, lifting drive, connecting plate and guide assembly in a testing device for detecting the smoothness of road surface during bridge construction, as described in this invention application.

[0029] Figure 11 This is a perspective view of the mounting plate and protective film in a testing device for detecting the smoothness of road surface during bridge construction, as described in this invention application.

[0030] The diagram is labeled as follows: 1. Walking device; 2. Fixed plate; 3. Lifting box; 31. Mounting slot; 4. Signal conversion structure; 41. Touch screen; 42. Stylus; 5. Lifting trigger mechanism; 51. Cover plate; 52. Lifting rod; 521. Slide groove; 53. Motion conversion structure; 531. Sleeve; 5311. First slot; 5312. Second slot; 5313. Third slot; 532. Transmission rod; 533. Axis limit seat; 54. Reset structure; 541. Fixed ring; 542. Compression spring; 55. Axial restriction structure; 551. Limit sleeve; 552. Limit block; 56. Rolling structure; 561. Connecting frame; 562. Roller; 7. Lifting mechanism; 71. Lifting driver; 72. Connecting plate; 73. Guide assembly; 731. Guide rod; 732. Slider; 8. Protective structure; 81. Mounting plate; 82. Protective film. Detailed Implementation

[0031] To further understand the features, technical means, and specific objectives and functions achieved by this invention application, the invention application will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0032] Reference Figures 1 to 11 As shown: A testing device for detecting the smoothness of a bridge construction surface includes a fixed plate 2, a lifting box 3, a testing mechanism, and a lifting mechanism 7. The fixed plate 2 is connected to a traveling device 1. The lifting box 3 is arranged parallel to the fixed plate 2, and has multiple mounting slots 31 arranged in at least two rows, with the slots 31 in the two rows arranged alternately. Multiple testing mechanisms are provided, each located within a mounting slot 31. Each testing mechanism includes a signal conversion structure 4 and a lifting trigger mechanism 5. The signal conversion structure 4 includes a touch screen 41 and a stylus 42. The touch screen 41 is horizontally positioned on the mounting slot 31. The stylus 42 is vertically positioned below the touchscreen 41, with its tip abutting against the touchscreen 41. The lifting trigger mechanism 5 includes a cover plate 51, a lifting rod 52, a motion conversion structure 53, and a reset structure 54. The cover plate 51 covers the bottom of the mounting groove 31. The lifting rod 52 passes vertically through the cover plate 51 and is movably connected to it. The motion conversion structure 53 connects the upper end of the lifting rod 52 and the stylus 42, and is used to convert the vertical movement of the lifting rod 52 into the rotation of the stylus 42 around the lifting rod 52. The reset structure 54 is used to provide a downward thrust to the lifting rod 52. The lifting mechanism 7 is used to adjust the height of the lifting box 3.

[0033] First, the fixed plate 2 is securely connected to the walking device 1. Then, the height of the lifting box 3 is adjusted by the lifting mechanism 7 to maintain a suitable detection distance between the lifting box 3 and the road surface to be inspected. At the same time, the bottom of the lifting rod 52 in the lifting trigger mechanism 5 is initially close to the road surface. In the initial state, the lifting rod 52 is precisely at the critical point of the motion conversion structure 53 driven by the reset structure 54 and the lifting mechanism 7. At this time, the tip of the stylus 42 in the signal conversion structure 4 is in close contact with the touch screen 41, forming a stable initial fixed contact point, establishing a unified signal reference for subsequent detection. When the walking device 1 is started, the walking device 1 drives the detection device to move at a uniform speed along the road surface of the bridge construction. Since the multiple mounting slots 31 on the lifting box 3 are arranged in at least two staggered rows, and each mounting slot 31 is equipped with an independent detection mechanism, the detection points of each detection mechanism form a uniformly covered detection network on the road surface, effectively avoiding detection blind spots. During operation, if the road surface is level, the supporting force of the road surface on the lifting rod 52 remains constant, the lifting rod 52 does not undergo vertical displacement, the motion conversion structure 53 receives no power input, the contact point between the stylus 42 and the touch screen 41 remains initially fixed, and the signal output by the touch screen 41 is a continuous straight line, intuitively reflecting the smoothness of the road surface. When the lifting rod 52 passes over a concave road surface, the lifting rod 52 moves downward synchronously under the downward pushing force of the reset structure 54. The vertical downward movement of the lifting rod 52 is converted into a counterclockwise movement of the stylus 42 through the motion conversion structure 53. As the stylus 42 rotates, it draws a counter-clockwise arc on the touchscreen 41. The signal output by the touchscreen 41 is the curve deviating from the reference straight line, and the deviation of the curve is positively correlated with the depth of the road surface depression. When the lifting rod 52 passes over the convex road surface, it moves vertically upward. This vertical upward movement of the lifting rod 52 is converted into a clockwise rotation of the stylus 42 through the motion conversion structure 53. The stylus 42 draws a clockwise arc on the touchscreen 41, and the signal output by the touchscreen 41 is the curve deviating from the reference straight line on the other side. The deviation of the curve corresponds to the height of the road surface convexity. Throughout the entire testing process, the touchscreen 41 continuously records the signal changes of each testing mechanism, fully presenting the smoothness of the bridge construction road surface and providing comprehensive and accurate raw data for construction quality assessment. The intuitiveness of the detection signal is significantly improved. The vertical movement of the lifting rod 52 caused by the unevenness of the road surface is directly converted into the clockwise or counterclockwise rotation of the stylus 42 through the motion conversion structure 53. The motion is presented in real time on the touch screen 41 in the form of a reference straight line and a bidirectional offset curve. The horizontal road surface corresponds to the straight line, the concave road surface corresponds to the counterclockwise arc, and the convex road surface corresponds to the clockwise arc. The road surface condition and the signal form form a clear correspondence. The road surface flatness can be quickly judged without complicated interpretation, thereby avoiding the error loss of signal transmission in the indirect detection method and greatly improving the accuracy of the detection signal.

[0034] Reference Figure 3 , Figure 4 and Figure 5 As shown: The motion conversion structure 53 includes a sleeve 531 and a transmission rod 532; the side wall of the sleeve 531 is provided with a groove, which is divided into three sections from top to bottom, namely the first groove 5311, the second groove 5312 and the third groove 5313. The upper end of the sleeve 531 is connected to the stylus 42; one end of the transmission rod 532 is connected to the lifting rod 52, and the other end of the transmission rod 532 is slidably disposed in the groove. The transmission rod 532 drives the sleeve 531 and the stylus 42 to rotate in a directional manner through the trajectory guidance of the groove.

[0035] In the initial state, the transmission rod 532 is located in the second groove 5312 (critical point). At this time, the sleeve 531 and the stylus 42 remain stationary, and the stylus 42 maintains a fixed contact point with the touch screen 41. When the road surface is raised, the lifting rod 52 moves upward, causing the transmission rod 532 to slide from the second groove 5312 into the first groove 5311. The groove trajectory guides the sleeve 531 to rotate clockwise, which in turn causes the stylus 42 to rotate clockwise. When the road surface is lowered, the lifting rod 52 moves downward, causing the transmission rod 532 to slide from the second groove 5312 into the third groove 5313. The groove trajectory guides the sleeve 531 to rotate counterclockwise, which simultaneously causes the stylus 42 to rotate counterclockwise. The groove is divided into three sections, clearly defining the movement area of ​​the transmission rod 532 under different road conditions, realizing the directional correspondence of "convex upward - clockwise rotation" and "concave downward - counterclockwise rotation", thereby realizing a unique mapping relationship between the rotation direction of the stylus 42 and the undulation of the road surface, and improving the recognition of the detection signal.

[0036] Reference Figure 3 and Figure 6 As shown: The lifting triggering mechanism 5 also includes an axial limiting structure 55, which includes a limiting sleeve 551 and a limiting block 552; the limiting sleeve 551 is coaxially sleeved on the outside of the lifting rod 52; the limiting block 552 is used to limit the movement of the lifting rod 52 along its own axis.

[0037] When the lifting rod 52 passes over a convex road surface, the road surface protrusion exerts an upward pushing force on the lifting rod 52. The lifting rod 52 overcomes the thrust of the reset structure 54 and moves vertically upward along its own axis. During this process, the limiting sleeve 551 and the limiting block 552 restrict the circumferential rotation of the lifting rod 52, ensuring that the lifting rod 52 only performs vertical upward movement. When the lifting rod 52 passes over a concave road surface, the supporting force of the road surface on the lifting rod 52 weakens, and the lifting rod 52 moves vertically downward along its own axis under the thrust of the reset structure 54. The axial limiting structure 55 continuously restricts the circumferential torsion of the lifting rod 52, ensuring that the lifting rod 52 performs vertical downward movement. The axial limiting structure 55, through the cooperation of the limiting sleeve 551 and the limiting block 552, thereby restricting the circumferential rotation of the lifting rod 52, forcing the lifting rod 52 to only perform purely vertical lifting and lowering movements along its own axis.

[0038] Reference Figure 6 As shown: A sliding groove 521 along its own axis is provided on the side wall of the lifting rod 52, and the sliding groove 521 is slidably adapted to the limiting block 552 of the axial limiting structure 55.

[0039] The sliding groove 521 on the side wall of the lifting rod 52, along its own axis, forms a sliding fit with the limiting block 552 of the axial limiting structure 55. This structural fit further strengthens the restriction on the circumferential rotation of the lifting rod 52. The sliding groove 521 provides a clear guide trajectory for the limiting block 552, ensuring that the limiting block 552 is always embedded within the sliding groove 521, forming a rigid constraint in the circumferential direction and completely preventing the possibility of circumferential torsion of the lifting rod 52. This ensures that the direction of movement of the lifting rod 52 is strictly limited to the vertical direction along its own axis, achieving the uniqueness of the lifting rod 52's direction of movement.

[0040] Reference Figure 3 and Figure 7 As shown: The reset structure 54 includes a fixed ring 541 and a spring 542; the fixed ring 541 is fixedly connected to the lifting rod 52; the spring 542 is sleeved on the lifting rod 52, and the two ends of the spring 542 are respectively connected to the fixed ring 541 and the cover plate 51.

[0041] The lifting mechanism 7 adjusts the height of the lifting box 3 so that the bottom of the lifting rod 52 contacts the road surface of the bridge to be inspected. At this time, the force of the spring 542 is transmitted to the lifting rod 52 through the fixing ring 541, pushing the lower end of the lifting rod 52 to fit tightly against the road surface. At the same time, under the combined action of the spring 542, the lifting mechanism 7, and the road surface, the transmission rod 532 is positioned in the second groove 5312 of the sleeve 531. When the lifting rod 52 passes over a convex road surface, the road surface protrusion generates an upward pushing force on the lifting rod 52, overcoming part of the pushing force of the spring 542, and pushing the lifting rod 52 to move vertically upward. The fixing ring 541 moves upward synchronously with the lifting rod 52, further compressing the spring 542. When the lifting rod 52 passes over a concave road surface, the supporting force of the road surface on the lifting rod 52 weakens, and the pushing force of the spring 542 pushes the lifting rod 52 to move vertically downward. The fixing ring 541 moves downward synchronously, and the compression of the spring 542 decreases, causing the lower end of the lifting rod 52 to quickly fit against the bottom of the concave surface. The pre-compressed spring 542 continuously provides downward thrust, ensuring that the lower end of the lifting rod 52 is in close contact with the road surface. It can respond quickly regardless of changes in road surface undulations, thereby avoiding missed detections due to poor contact.

[0042] Reference Figure 3 and Figure 8 As shown: The lifting triggering mechanism 5 also includes a rolling structure 56, which is located at the lower end of the lifting rod 52 and is used to roll into contact with the road surface to reduce friction during the detection process.

[0043] Specifically, the rolling structure 56 includes a connecting frame 561 and a roller 562. The connecting frame 561 is connected to the lower end of the lifting rod 52, and the roller 562 is mounted on the connecting frame 561.

[0044] During the movement of the detection device, the roller 562 at the lower end of the lifting rod 52 forms rolling contact with the road surface. As the detection device moves, the roller 562 continuously rolls along the road surface, converting the relative motion between the lifting rod 52 and the road surface into the rotational motion of the roller 562. The lifting trigger mechanism 5, through the rolling structure 56 formed by the connecting frame 561 and the roller 562, achieves rolling contact between the lifting rod 52 and the road surface, converting the sliding friction generated by sliding contact into rolling friction from the rotation of the roller 562. The frictional resistance of rolling friction is much smaller than that of sliding friction, thereby reducing the frictional resistance between the detection mechanism and the road surface.

[0045] Reference Figure 3 and Figure 9 As shown: The motion conversion structure 53 also includes an axis limiting seat 533, which is sleeved on the outside of the sleeve 531, and the axis limiting seat 533 is connected to both ends of the sleeve 531 by bearings.

[0046] When roller 562 passes over a raised surface, lifting rod 52 moves upward, causing transmission rod 532 to slide from the second groove 5312 into the first groove 5311. Guided by the groove's trajectory, sleeve 531 rotates clockwise. At this time, sleeve 531 rotates within axis limiting seat 533 via bearings at both ends. Axis limiting seat 533 restricts the axial displacement of sleeve 531, ensuring the engagement of transmission rod 532 with the groove. Stylus 42 rotates clockwise synchronously, and the corresponding signal output curve is generated. When roller 562 passes over a recessed surface, lifting rod 52 moves downward, transmission rod 532 slides into the third groove 5313, and drives sleeve 531 to rotate counterclockwise. Sleeve 531 rotates smoothly under the rotational support of axis limiting seat 533 without axial offset. Stylus 42 rotates counterclockwise, and the corresponding signal output curve is generated. Axis limiting seat 533, by connecting to both ends of sleeve 531, achieves positioning of the rotation axis of sleeve 531.

[0047] Reference Figure 1 and Figure 10 As shown: The lifting mechanism 7 includes a lifting drive 71 and a connecting plate 72; the lifting drive 71 is mounted on the fixed plate 2; the connecting plate 72 is used to connect the lifting drive 71 and the lifting box 3.

[0048] Before testing, the lifting driver 71 of the lifting mechanism 7 is activated. The lifting driver 71 drives the connecting plate 72 to move vertically through its output end, and the connecting plate 72 synchronously drives the lifting box 3 to move up and down as a whole. By adjusting the lifting driver 71, the height of the lifting box 3 is gradually adjusted, thereby driving the lifting rod 52 and the bottom rolling structure 56 to move up and down synchronously, so that the roller 562 of the rolling structure 56 forms a suitable and close fit with the road surface of the bridge to be tested. During the height adjustment of the lifting box 3, the position of the transmission rod 532 in the motion conversion structure 53 is observed in real time: when the lifting rod 52 reaches equilibrium under the combined action of the downward pushing force of the compression spring 542 of the reset structure 54, the supporting force of the road surface on the roller 562, and the supporting force of the lifting mechanism 7, the transmission rod 532 slides into the second groove 5312 of the sleeve 531 (i.e., the critical point for driving the motion conversion structure 53 to move). At this point, the tip of the stylus 42 and the touchscreen 41 form a stable initial fixed contact point, the lifting driver 71 is turned off, and the height calibration and positioning of the transmission rod 532 are completed before detection. This establishes a unified and stable reference state for the detection work, ensuring the accuracy of the detection signal.

[0049] Reference Figure 10 As shown: The lifting mechanism 7 also includes multiple guide components 73, which are used to limit the direction of movement of the lifting box 3.

[0050] Specifically, the guide assembly 73 includes a guide rod 731 and a slider 732. The guide rod 731 is vertically mounted on the fixed plate 2, and the slider 732 is slidably mounted on the guide rod 731. The slider 732 is connected to the lifting box 3.

[0051] Before testing, the lifting drive 71 is activated. The lifting drive 71 outputs power to move the lifting box 3 as a whole through the connecting plate 72. During this process, the lifting box 3 drives the slider 732 to slide vertically along the guide rod 731. The guide rod 731 restricts the movement direction of the lifting box 3 through the slider 732, preventing the lifting box 3 from horizontally deviating, tilting, or rotating during the lifting process. The guide assembly 73 ensures that the lifting box 3 and the fixed plate 2 remain parallel at all times, thereby ensuring that the power transmitted by the lifting drive 71 through the connecting plate 72 can be fully converted into the vertical displacement of the lifting box 3, achieving precise positioning of the transmission rod 532 in the second groove 5312 of the sleeve 531.

[0052] Reference Figure 1 and Figure 11 As shown: The upper end of the lifting box 3 is provided with a protective structure 8, which is used to protect the touch screen 41 from damage by dust, impact and debris in the construction environment.

[0053] Specifically, the protective structure 8 includes a mounting plate 81 and a high-transparency, wear-resistant protective film 82. The mounting plate 81 is arranged parallel to the upper end of the lifting box 3, and all touch screens 41 are mounted on the mounting plate 81. The high-transparency, wear-resistant protective film 82 covers all touch screens 41.

[0054] The high-transparency, wear-resistant protective film 82 completely covers the entire surface of the touchscreen 41, ensuring a tight fit between the film and the screen 41 without bubbles or wrinkles. This ensures that the film does not affect the contact conduction between the stylus 42 and the touchscreen 41, while also providing comprehensive protection for the touchscreen 41. The high-transparency, wear-resistant protective film 82 effectively isolates dust, sand, debris, and other impurities from the construction environment, preventing these from adhering to or scratching the touchscreen 41. It also prevents dust from entering the gaps of the touchscreen 41 and affecting its use, thereby extending the lifespan of the touchscreen 41.

[0055] The above embodiments only illustrate one or more implementation methods of this invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this invention, and these all fall within the protection scope of this invention. Therefore, the protection scope of this invention should be determined by the appended claims.

Claims

1. A testing device for detecting the smoothness of road surface during bridge construction, characterized in that, Includes a fixed plate, lifting box, detection mechanism, and lifting mechanism; The fixed plate is connected to the walking device; The lifting box is set parallel to the fixed plate, and multiple mounting slots are provided on the lifting box; The device has multiple detection mechanisms, each set in a separate mounting slot. Each detection mechanism includes a signal conversion structure and a lifting trigger mechanism. The signal conversion structure includes a touch screen and a stylus. The touch screen is horizontally positioned above the mounting slot, and the stylus is vertically positioned below the touch screen, with the stylus tip abutting against the touch screen. The lifting trigger mechanism includes a cover plate, a lifting rod, a motion conversion structure, and a reset structure. The cover plate is placed at the bottom of the mounting slot, and the lifting rod passes vertically through the cover plate and is movably connected to it. The motion conversion structure connects the upper end of the lifting rod and the stylus, and is used to convert the vertical movement of the lifting rod into the rotation of the stylus around the lifting rod. The reset structure is used to provide a downward thrust to the lifting rod. The lifting mechanism is used to adjust the height of the lifting box.

2. The testing device for detecting the smoothness of road surface during bridge construction according to claim 1, characterized in that, The motion conversion structure includes a sleeve and a transmission rod; The sleeve has grooves on its side wall; One end of the transmission rod is connected to the lifting rod, and the other end of the transmission rod is slidably set in the groove. The transmission rod drives the sleeve and the stylus to rotate in a directional manner through the trajectory guidance of the groove.

3. The testing device for detecting the smoothness of road surface during bridge construction according to claim 1, characterized in that, The lifting triggering mechanism also includes an axial limiting structure, which includes a limit sleeve and a limit block; The limiting sleeve is coaxially sleeved on the outside of the lifting rod; The limit block is used to restrict the movement of the lifting rod along its own axis.

4. The testing device for detecting the smoothness of road surface during bridge construction according to claim 1, characterized in that, The side wall of the lifting rod is provided with a sliding groove along its own axis, and the sliding groove is slidably adapted to the limiting block of the axial limiting structure.

5. A testing device for detecting the smoothness of road surface during bridge construction according to claim 1, characterized in that, The reset structure includes a retaining ring and a spring; The retaining ring is fixedly connected to the lifting rod; The spring is sleeved on the lifting rod, and the two ends of the spring are connected to the fixing ring and the cover plate, respectively.

6. The testing device for detecting the smoothness of road surface during bridge construction according to claim 1, characterized in that, The lifting trigger mechanism also includes a rolling structure, which is located at the lower end of the lifting rod and is used to roll into contact with the road surface to reduce friction during the detection process.

7. A testing device for detecting the smoothness of road surface during bridge construction according to claim 2, characterized in that, The motion conversion structure also includes an axis limiting seat, which is sleeved on the outside of the sleeve, and the axis limiting seat is connected to both ends of the sleeve by bearings.

8. A testing device for detecting the smoothness of road surface during bridge construction according to claim 1, characterized in that, The lifting mechanism includes a lifting drive and a connecting plate; The lifting drive is mounted on the fixed plate; The connecting plate is used to connect the lifting drive and the lifting box.

9. A testing device for detecting the smoothness of road surface during bridge construction according to claim 8, characterized in that, The lifting mechanism also includes multiple guide components, which are used to limit the direction of movement of the lifting box.

10. A testing device for detecting the smoothness of road surface during bridge construction according to claim 1, characterized in that, The upper part of the lifting box is equipped with a protective structure to protect the touch screen from dust, impacts, and debris in the construction environment.

Images