A roadbed and pavement detection device based on intelligent sensors

Abstract

This invention discloses a roadbed and pavement inspection device based on intelligent sensors, belonging to the field of roadbed and pavement inspection technology, including a vehicle-mounted frame. The device, when detecting roadbed and pavement protrusions, connects the vehicle-mounted frame to a mobile vehicle. The detection structure performs contact detection on the protruding portion. During contact detection, if a protrusion is detected, a trigger plate contacts and presses against a pressure sensor. The pressure sensor transmits a signal to the control terminal, opening a solenoid valve. Simultaneously, after the contact plate contacts the protrusion, it moves upward, causing the filling rod to move upward, positioning the flow hole between the two connecting pipes. The marking liquid inside the detection seat's reservoir flows through the inlet pipe into the delivery pipe, finally entering the marking plate and exiting through the marking liquid hole, completing the real-time marking of the protruding area. This allows workers to directly repair the protruding area after the mobile vehicle has passed through.

Description

Technical Field

[0001] This invention relates to the field of roadbed and pavement inspection technology, and in particular to a roadbed and pavement inspection device based on intelligent sensors. Background Technology

[0002] Subgrade and pavement testing refers to the process of quantitatively evaluating the physical properties, mechanical properties, structural condition, and functional performance of subgrade and pavement using various instruments, equipment, and methods during the construction (construction process and completion acceptance) and operation and maintenance phases of highways.

[0003] With technological advancements, vehicle-mounted automated road surface inspection systems based on various sensors (such as lasers, images, and accelerometers) have been applied, enabling rapid acquisition of information on road surface smoothness, ruts, and cracks. However, existing equipment generally suffers from a disconnect between the "detection" and "marking" stages. These systems typically only record GPS coordinates and sensor data in the onboard computer when an abnormality is detected, without physically marking the actual damage points. Subsequent maintenance personnel must use handheld positioning devices to compare the data and coordinates in the inspection report and locate the target points in complex road conditions. This process is time-consuming, labor-intensive, and prone to errors due to coordinate drift or environmental changes. Therefore, there is an urgent need for an intelligent detection device that can achieve "instant detection and marking," automatically leaving a visual mark on the road surface the moment a damage is detected, greatly improving the response speed and accuracy of maintenance operations. Summary of the Invention

[0004] This invention discloses a roadbed and pavement inspection device based on intelligent sensors, which aims to solve the problem that existing vehicle-mounted automated pavement inspection systems can only record GPS coordinates and sensor information in the computer when collecting data on defects such as smoothness, ruts, and cracks, but cannot physically mark the actual defect points. This results in maintenance personnel having to repeatedly search for target points on-site with handheld positioning devices and by referring to inspection reports, which is time-consuming, labor-intensive, and prone to positioning errors due to coordinate drift or environmental changes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A roadbed and pavement inspection device based on intelligent sensors includes a vehicle-mounted frame and an inspection base. The inspection base has an internal inspection structure and a dual-trigger marking mechanism. The inspection structure includes a trigger plate. Two limiting grooves are formed on the inner sidewall of the inspection base, and limiting sliders are slidably connected inside each groove. The trigger plate is fixedly connected to the outer sidewall of the two limiting sliders. A pressure sensor is fixedly connected to the bottom inner wall of the inspection base, and the pressure sensor is not in contact with the trigger plate. A central column is fixedly connected to the bottom of the trigger plate, and a contact circular plate is fixedly connected to the bottom of the central column. The dual-trigger marking mechanism includes a filling rod. An installation groove is annularly formed on the top of the contact circular plate, and the filling rod is fixedly connected to the bottom inner wall of the installation groove. The inspection base is located at... A fixing rod is fixedly connected to the outer wall above the filling rod. An outer sleeve is fixedly connected to the bottom of the fixing rod. The top of the filling rod is inserted into the inside of the outer sleeve. Two symmetrically distributed pipe holes are opened on the outer wall of the outer sleeve. A connecting pipe is fixedly connected to the inside of each pipe hole. A flow hole is opened on the outer wall of the filling rod below the two connecting pipes. An inlet pipe is inserted into the connecting pipe closer to the detection seat. One end of the inlet pipe is inserted into the liquid storage chamber opened inside the detection seat. A solenoid valve is connected to the outer wall of the connecting pipe away from the detection seat through a flange. An infusion pipe is inserted into the inside of the connecting pipe. An installation rod is fixedly connected to one side of the fixing rod. A marking plate is fixedly connected to the bottom of the installation rod. Marking liquid holes are opened at equal intervals at the bottom of the marking plate. One end of the infusion pipe is inserted into the inside of the marking plate.

[0006] In a preferred embodiment, an integrated ring rod is fixedly connected to the bottom inner wall of the detection seat, and telescopic connecting rods are distributed in a ring at the bottom of the integrated ring rod. The bottom end of the telescopic connecting rod is fixedly connected to the top of the trigger plate. A liquid filling hole is opened at the top of the detection seat, and a liquid filling tube is fixedly connected inside the liquid filling hole. A tube cap is screwed onto the liquid filling tube.

[0007] In a preferred embodiment, the outer walls of the contact circular plate at two symmetrically distributed mounting slots are fixedly connected to unfolding plates, and the unfolding plates have a central channel at the middle position, which is connected to the mounting slots. An unfolding cylinder is fixedly connected to the inner wall of the mounting slot on the side away from the unfolding plate, and a push rod is fixedly connected to the output end of the unfolding cylinder, which is adapted to the central channel.

[0008] In a preferred embodiment, an external rod is fixedly connected to the top of the unfolding plate, and a matching telescopic rod is fixedly connected to the side of the external rod away from the contact circular plate. An extension rod is fixedly connected to the end of the matching telescopic rod, and two return spring rods are fixedly connected to the side of the extension rod facing the external rod. One end of the two return spring rods is fixedly connected to the outer wall of the external rod.

[0009] In a preferred embodiment, the unfolding plate has equidistant track grooves on both sides of the middle channel, and each track groove is slidably connected to an adjusting rod. Each adjusting rod is fixedly connected to a connecting block on the outer side wall away from the unfolding plate. A second reset spring rod is fixedly connected to the side of the connecting block facing the unfolding plate, and one end of the second reset spring rod is fixedly connected to one side of the unfolding plate.

[0010] In a preferred embodiment, an extension rail is fixedly connected to the vehicle frame, and the extension rail is provided with an extension and widening mechanism. The extension and widening mechanism includes two end frames and two fixed-length slide rods. Two connecting slide rods are slidably connected inside the extension rail, and the end frames are fixedly connected to one end of the adjacent connecting slide rods.

[0011] In a preferred embodiment, a middle block is fixedly connected to the bottom of the unfolding rail at the middle position, and a push cylinder is fixedly connected to both sides of the middle block. The output ends of the two push cylinders are fixedly connected to one side of an adjacent connecting slide rod. Two end docking rods are fixedly connected to opposite sides of the two end frames, and a docking plug rod is fixedly connected to the side of each end docking rod away from the end frame.

[0012] In a preferred embodiment, both ends of the fixed-length slide rod are provided with mating slots, and an embedded rod is inserted into the mating slot. One end of the embedded rod is fixedly connected to an assembly rod, and the end of the assembly rod facing the mating rod is provided with a fitting slot, into which the mating rod is inserted.

[0013] In a preferred embodiment, the top of the detection seat is fixedly connected to two sliding frames, and the two sliding frames are fixedly connected to the same intermediate connecting rod. The sliding frames are slidably connected to the outer side wall of adjacent fixed-length sliding rods.

[0014] In a preferred embodiment, the sliding frame has two operating slots on the inner ring surface near the fixed-length slide rod, and a hydraulic cylinder is fixedly connected to the opposite side of each of the two operating slots. A positioning plate is fixedly connected to the output end of each of the two hydraulic cylinders, and the positioning plate is in contact with the outer wall of the fixed-length slide rod.

[0015] This invention provides a roadbed and pavement inspection device based on intelligent sensors. When detecting roadbed and pavement protrusions, the device connects the vehicle-mounted frame to a mobile vehicle. The protrusion is detected through a contact structure. During the contact detection process, if a protrusion is detected, the trigger plate contacts and presses against the pressure sensor. The pressure sensor then transmits a signal to the control terminal, opening the solenoid valve. Simultaneously, after the contact plate contacts the protrusion, it moves upward, causing the filling rod to move upward, positioning the flow hole between the two connecting pipes. The marking liquid inside the detection seat's reservoir flows through the inlet pipe into the delivery pipe, and finally into the marking plate, exiting through the marking liquid hole. This completes the real-time marking of the protrusion. The device allows workers to directly repair the protrusion after the mobile vehicle has passed through. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a roadbed and pavement detection device based on intelligent sensors proposed in this invention.

[0017] Figure 2 for Figure 1 A side view of the overall structure.

[0018] Figure 3 This is a schematic diagram of the combined structure of the detection seat, detection structure and dual triggering marking mechanism of a roadbed and pavement detection device based on intelligent sensors proposed in this invention.

[0019] Figure 4 for Figure 3 Cross-sectional view of the combined structure of the detection seat and trigger plate.

[0020] Figure 5 for Figure 4 A schematic diagram of the planar structure.

[0021] Figure 6 This is a schematic diagram of the combined structure of the contact circular plate, the unfolding plate, and the dual triggering marking mechanism of a roadbed and pavement detection device based on intelligent sensors proposed in this invention.

[0022] Figure 7 This is a cross-sectional view of the unfolded plate structure of a roadbed and pavement detection device based on intelligent sensors proposed in this invention.

[0023] Figure 8 This is a schematic diagram of a dual-trigger marking mechanism for a roadbed and pavement detection device based on intelligent sensors proposed in this invention.

[0024] Figure 9 This is a schematic diagram of the combined structure of the vehicle-mounted frame and the extension and widening mechanism of a roadbed and pavement detection device based on intelligent sensors proposed in this invention.

[0025] Figure 10 for Figure 9 A breakdown diagram of the assembled round rod and fixed-length sliding rod structure.

[0026] Figure 11 for Figure 7 Exploded view of the central channel and trajectory groove structure inside the central unfolded plate.

[0027] Figure 12 This is a schematic diagram of the combined structure of the deployable rail and connecting slide bar of a roadbed and pavement detection device based on intelligent sensors proposed in this invention.

[0028] In the diagram: 1. Vehicle-mounted frame; 2. Deployment rail; 3. Detection seat; 4. Dual-trigger marking mechanism; 401. Filling rod; 402. Outer sleeve; 403. Marking plate; 404. Fixing rod; 405. Infusion tube; 406. Mounting rod; 407. Solenoid valve; 408. Connecting tube; 409. Inlet tube; 410. Flow hole; 411. Marking fluid hole; 5. Sliding frame; 6. Extension and widening mechanism; 601. End frame; 602. Assembly round rod; 603. Fixed-length slide rod; 604. Connecting slide rod; 605. End docking rod; 606. Intermediate block; 607. Push cylinder; 608. Embedding rod; 609. Fitting slot; 610. Docking rod; 611. 7. Docking slot; 8. Liquid filling pipe; 9. Detection structure; 10. Trigger plate; 11. Deployment plate; 12. Contact circular plate; 13. Extension rod; 14. Adjustment rod; 15. Telescopic connecting rod; 16. Pressure sensor; 17. Integrated ring rod; 18. Limiting slider; 19. Deployment cylinder; 10. Push rod; 11. Limiting slide groove; 12. Return spring rod one; 13. Co-operating telescopic rod; 14. External connecting rod; 15. Intermediate column; 16. Mounting slot; 17. Intermediate channel; 18. Return spring rod two; 19. Connecting block; 20. Operating slot; 21. Positioning plate; 22. Hydraulic cylinder; 23. Intermediate connecting rod; 24. Pipe cover. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] This invention discloses a roadbed and pavement inspection device based on intelligent sensors, which is mainly used to solve the problem of the disconnect between the "inspection" and "marking" links in the existing vehicle-mounted automated pavement inspection system. Although current inspection systems based on technologies such as laser, image, and acceleration sensors can efficiently collect information such as pavement smoothness, ruts, and cracks, they can usually only record the GPS coordinates and sensor data of the defect points in the vehicle computer, and cannot physically mark the actual defect locations. This leads to subsequent maintenance personnel having to manually find the target points in complex road conditions by holding a positioning device and comparing the coordinate data in the inspection report. The process is time-consuming and laborious, and is prone to positioning deviations due to GPS coordinate drift or environmental changes.

[0031] Reference Figures 1-12 A roadbed and pavement detection device based on intelligent sensors includes a vehicle-mounted frame 1 and a detection seat 3. The detection seat 3 has a detection structure 8 inside and a dual-trigger marking mechanism 4. The detection structure 8 includes a trigger plate 801. Two limiting grooves 812 are formed on the inner sidewall of the detection seat 3, and limiting sliders 809 are slidably connected inside each of the two limiting grooves 812. The trigger plate 801 is fixedly connected to the outer sidewall of the two limiting sliders 809. A pressure sensor 807 is fixedly connected to the bottom inner wall of the detection seat 3. The pressure sensor 807 is not in contact with the trigger plate 801. A middle column 816 is fixedly connected to the bottom of the trigger plate 801, and a contact circular plate 803 is fixedly connected to the bottom of the middle column 816. The dual-trigger marking mechanism 4 includes a filling rod 401. An installation groove 817 is formed annularly on the top of the contact circular plate 803. The filling rod 401 is fixedly connected to the bottom inner wall of the installation groove 817. The detection seat 3 is located above the filling rod 401. A fixing rod 404 is fixedly connected to the outer wall. An outer sleeve 402 is fixedly connected to the bottom of the fixing rod 404. The top of the filling rod 401 is inserted into the inside of the outer sleeve 402. Two symmetrically distributed pipe holes are opened on the outer wall of the outer sleeve 402. A connecting pipe 408 is fixedly connected inside each of the two pipe holes. A flow hole 410 is opened on the outer wall of the filling rod 401 below the two connecting pipes 408. An inlet pipe 409 is inserted into the connecting pipe 408 near the detection seat 3. One end of tube 409 is inserted into the liquid storage chamber inside the detection seat 3. The outer wall of the connecting tube 408 away from the detection seat 3 is connected to a solenoid valve 407 via a flange. An infusion tube 405 is inserted into the inside of the connecting tube 408. An installation rod 406 is fixedly connected to one side of the fixing rod 404. A marking plate 403 is fixedly connected to the bottom of the installation rod 406. Marking liquid holes 411 are opened at equal intervals at the bottom of the marking plate 403. One end of the infusion tube 405 is inserted into the inside of the marking plate 403.

[0032] In specific application scenarios, when detecting roadbed and pavement protrusions, the vehicle-mounted frame 1 is connected to the mobile vehicle. The protrusion is detected by contact through the detection structure 8. During the contact detection process, if a protrusion is found, the trigger plate 801 contacts and presses against the pressure sensor 807. The pressure sensor 807 then transmits a signal to the control terminal, and the solenoid valve 407 opens. At the same time, after the contact plate 803 contacts the protrusion, the contact plate 803 moves upward, and the filling rod 401 moves upward, so that the flow hole 410 is between the two connecting pipes 408. The marking liquid inside the liquid storage chamber of the detection seat 3 enters the infusion pipe 405 through the inlet pipe 409, and finally enters the marking plate 403 and is discharged through the marking liquid hole 411, completing the real-time marking of the protrusion. After the mobile vehicle passes through, the staff can directly repair the protrusion.

[0033] Specifically, during the detection of roadbed and pavement protrusions, the upward movement of the filling rod 401 and the opening of the solenoid valve 407 are dual triggering conditions, thereby ensuring that if one of them is accidentally triggered, the marking liquid will not flow out of the reservoir of the detection seat 3, thus improving the accuracy of the marking point.

[0034] Reference Figures 1-7 In a preferred embodiment, an integrated ring rod 808 is fixedly connected to the bottom inner wall of the detection seat 3, and a telescopic connecting rod 806 is distributed in a ring at the bottom of the integrated ring rod 808. The bottom end of the telescopic connecting rod 806 is fixedly connected to the top of the trigger plate 801. A liquid filling hole is opened at the top of the detection seat 3, and a liquid filling tube 7 is fixedly connected inside the liquid filling hole. A tube cap 13 is screwed onto the liquid filling tube 7.

[0035] Reference Figure 6 and Figure 7 In a preferred embodiment, the outer walls of the contact circular plate 803 located at two symmetrically distributed mounting slots 817 are fixedly connected to unfolding plates 802, and the unfolding plates 802 have a middle channel 818 at the middle position. The middle channel 818 is connected to the mounting slots 817. An unfolding cylinder 810 is fixedly connected to the inner wall of the mounting slot 817 away from the unfolding plate 802. A push rod 811 is fixedly connected to the output end of the unfolding cylinder 810. The push rod 811 is adapted to the middle channel 818.

[0036] Specifically, before conducting roadbed and pavement testing, the extension rod 804 and adjustment rod 805 are adjusted according to the width of the pavement. The adjustment and unfolding cylinder 810 drives the push rod 811 into the middle channel 818, thereby squeezing the adjustment rods 805 at both ends, causing the adjustment rods 805 to extend outward along the track groove. The second return spring rod 819 pulls them, facilitating their subsequent reset. After the push rod 811 is pushed to the extension rod 804, the push rod 811 pushes the extension rod 804, which, together with the telescopic rod 814 and the first return spring rod 813, pulls it to prevent it from detaching and facilitates subsequent reset. By unfolding the extension rod 804 and adjustment rod 805, the expansion area is increased, thereby improving the detection range of a single detection structure 8.

[0037] Reference Figure 6 and Figure 7 In a preferred embodiment, an external rod 815 is fixedly connected to the top of the unfolding plate 802, and a cooperating telescopic rod 814 is fixedly connected to the side of the external rod 815 away from the contact circular plate 803. An extension rod 804 is fixedly connected to the end of the cooperating telescopic rod 814. Two return spring rods 813 are fixedly connected to the side of the extension rod 804 facing the external rod 815, and one end of the two return spring rods 813 is fixedly connected to the outer side wall of the external rod 815.

[0038] Reference Figure 6 and Figure 7 In a preferred embodiment, the unfolding plate 802 has equidistant track grooves on both sides of the middle channel 818, and each track groove is slidably connected to an adjusting rod 805. Each adjusting rod 805 is fixedly connected to a connecting block 820 on the outer side wall away from the unfolding plate 802. A reset spring rod 819 is fixedly connected to the side of the connecting block 820 facing the unfolding plate 802, and one end of the reset spring rod 819 is fixedly connected to one side of the unfolding plate 802.

[0039] Reference Figure 1 , Figure 2 and Figure 9 In a preferred embodiment, a deployable rail 2 is fixedly connected to the vehicle frame 1, and an extension and widening mechanism 6 is provided on the deployable rail 2. The extension and widening mechanism 6 includes two end frames 601 and two fixed-length slide rods 603. Two connecting slide rods 604 are slidably connected inside the deployable rail 2, and the end frames 601 are fixedly connected to one end of the adjacent connecting slide rods 604.

[0040] Specifically, before conducting roadbed and pavement inspection, the extension and widening mechanism 6 is adjusted according to the width of the pavement. The adjustment push cylinder 607 pushes the connecting slide rod 604 in the opposite direction, causing the end docking rod 605 on the end frame 601 to separate from the assembly round rod 602. Then, the assembly round rod 602 is placed according to the width of the pavement. The embedded insert rod 608 on the assembly round rod is inserted into the docking slot 611 on the fixed-length slide rod 603. The length of the assembly round rod 602 installed between the two end frames 601 is adapted to the width of the roadbed and pavement. Finally, the docking insert rod 610 on the end docking rod 605 is inserted into the fitting slot 609 of the assembly round rod 602. The adjustment is completed, which is suitable for roadbed and pavement inspection of different widths.

[0041] Reference Figure 9 and Figure 10 In a preferred embodiment, a middle block 606 is fixedly connected to the bottom of the middle section of the unfolding track 2. Push cylinders 607 are fixedly connected to both sides of the middle block 606. The output ends of the two push cylinders 607 are fixedly connected to one side of the adjacent connecting slide rod 604. Two end docking rods 605 are fixedly connected to the opposite side of the two end frames 601. A docking insertion rod 610 is fixedly connected to the side of each end docking rod 605 away from the end frame 601.

[0042] Reference Figure 9 and Figure 10 In a preferred embodiment, both ends of the fixed-length slide bar 603 are provided with docking slots 611, and an embedded rod 608 is inserted into the docking slot 611. One end of the embedded rod 608 is fixedly connected to an assembly round rod 602. The end of the assembly round rod 602 facing the docking rod 610 is provided with a fitting slot 609, and the docking rod 610 is inserted into the fitting slot 609.

[0043] Reference Figures 1-4 In a preferred embodiment, two sliding frames 5 are fixedly connected to the top of the detection seat 3, and the same intermediate connecting rod 12 is fixedly connected to the two sliding frames 5. The sliding frames 5 are slidably connected to the outer side wall of the adjacent fixed-length sliding rod 603.

[0044] Reference Figure 4 In a preferred embodiment, the sliding frame 5 has two operating grooves 9 on the inner ring surface near the fixed length slide rod 603, and a hydraulic cylinder 11 is fixedly connected to the opposite side of the two operating grooves 9. The output end of the two hydraulic cylinders 11 is fixedly connected to a positioning plate 10, and the positioning plate 10 is in contact with the outer wall of the fixed length slide rod 603.

[0045] Working principle: In use, the vehicle-mounted frame 1 is connected to the mobile vehicle. Then, the extension and widening mechanism 6 is adjusted according to the width of the road surface. The adjustment push cylinder 607 pushes the connecting slide rod 604 in the opposite direction, causing the end docking rod 605 on the end frame 601 to separate from the assembly round rod 602. Then, the assembly round rod 602 is placed according to the width of the road surface. The insert rod 608 on the assembly round rod is inserted into the docking slot 611 on the fixed-length slide rod 603. The length of the assembly round rod 602 is then installed between the two end frames 601. After adapting the width of the roadbed and pavement, the connecting rod 610 on the end connecting rod 605 is inserted into the fitting slot 609 of the assembled round rod 602, completing the initial adjustment. Then, according to the width of the pavement, the extension rod 804 and the adjusting rod 805 are adjusted. The adjusting and unfolding cylinder 810 drives the pushing rod 811 to push into the middle channel 818, thereby squeezing the adjusting rods 805 at both ends, causing the adjusting rods 805 to extend outward along the track groove. The return spring rod 819 pulls them, facilitating their subsequent reset. After the push rod 811 is pushed to the extension rod 804, the push rod 811 pushes the extension rod 804, and together with the telescopic rod 814 and the return spring rod 813, pulls it to prevent it from disengaging and to facilitate subsequent reset. After the readjustment is completed, the moving vehicle moves the vehicle frame 1 and the equipment below it to start the detection of the roadbed and road surface protrusions. If a protrusion is found, the trigger plate 801 contacts and presses against the pressure sensor 807, and the pressure sensor 807 transmits a signal to the control terminal, solenoid valve 407. When the device is activated, the contact plate 803 contacts the protruding part and moves upward, causing the filling rod 401 to move upward, so that the flow hole 410 is between the two connecting pipes 408. The marking liquid inside the storage chamber of the detection seat 3 enters the infusion pipe 405 through the inlet pipe 409 and finally enters the marking plate 403, and is discharged through the marking liquid hole 411, completing the real-time marking of the protruding part. After the mobile vehicle passes through, the staff can directly repair the protruding part. The mobile vehicle continues to move to the section and the inspection is completed.

[0046] 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 roadbed and pavement detection device based on intelligent sensors, comprising a vehicle-mounted frame (1) and a detection base (3), characterized in that, The detection seat (3) is provided with a detection structure (8) inside, and a double trigger marking mechanism (4) is provided on the detection seat (3). The detection structure (8) includes a trigger plate (801). The inner sidewall of the detection seat (3) has two limiting slide grooves (812), and the two limiting slide grooves (812) are slidably connected to limiting sliders (809). The trigger plate (801) is fixedly connected to the outer sidewall of the two limiting sliders (809). A pressure sensor (807) is fixedly connected to the bottom inner wall of the detection seat (3). The pressure sensor (807) is fixedly connected to the inner sidewall of the bottom of the detection seat (3). 07) The trigger plate (801) is in a non-contact state. The bottom of the trigger plate (801) is fixedly connected to a middle column (816), and the bottom of the middle column (816) is fixedly connected to a contact circular plate (803). The dual trigger marking mechanism (4) includes a filling rod (401). The top of the contact circular plate (803) is annularly opened with an installation groove (817). The filling rod (401) is fixedly connected to the bottom inner wall of the installation groove (817). The outer wall of the detection seat (3) located above the filling rod (401) is fixedly connected to a fixing rod (4). 04), the bottom of the fixing rod (404) is fixedly connected to the outer sleeve (402), the top of the filling rod (401) is inserted into the inside of the outer sleeve (402), the outer wall of the outer sleeve (402) has two symmetrically distributed tube holes, and the inside of the two tube holes is fixedly connected to the connecting tube (408). The outer wall of the filling rod (401) located below the two connecting tubes (408) has a flow hole (410), and the connecting tube (408) near the detection seat (3) is connected to the liquid inlet tube (409). One end of the liquid inlet tube (409) is connected to the liquid inlet tube (409). A solenoid valve (407) is connected to the outer wall of the connecting pipe (408) away from the detection seat (3) through a flange. An infusion tube (405) is inserted into the inside of the connecting pipe (408). An installation rod (406) is fixedly connected to one side of the fixing rod (404). A marking plate (403) is fixedly connected to the bottom of the installation rod (406). Marking liquid holes (411) are opened at equal intervals at the bottom of the marking plate (403). One end of the infusion tube (405) is inserted into the inside of the marking plate (403).

2. The roadbed and pavement detection device based on intelligent sensors according to claim 1, characterized in that, The bottom inner wall of the detection seat (3) is fixedly connected to an integrated ring rod (808), and a telescopic connecting rod (806) is distributed in a ring at the bottom of the integrated ring rod (808). The bottom end of the telescopic connecting rod (806) is fixedly connected to the top of the trigger plate (801). The top of the detection seat (3) has a liquid filling hole, and a liquid filling pipe (7) is fixedly connected inside the liquid filling hole. A pipe cap (13) is screwed onto the liquid filling pipe (7).

3. The roadbed and pavement detection device based on intelligent sensors according to claim 2, characterized in that, The outer walls of the contact circular plate (803) located at two symmetrically distributed mounting slots (817) are fixedly connected to unfolding plates (802), and the unfolding plates (802) have a middle channel (818) at the middle position. The middle channel (818) is connected to the mounting slots (817). An unfolding cylinder (810) is fixedly connected to the inner wall of the mounting slot (817) away from the unfolding plate (802). A push rod (811) is fixedly connected to the output end of the unfolding cylinder (810), and the push rod (811) is adapted to the middle channel (818).

4. The roadbed and pavement detection device based on intelligent sensors according to claim 3, characterized in that, An external rod (815) is fixedly connected to the top of the unfolding plate (802), and a matching telescopic rod (814) is fixedly connected to the side of the external rod (815) away from the contact circular plate (803). An extension rod (804) is fixedly connected to the end of the matching telescopic rod (814). Two return spring rods (813) are fixedly connected to the side of the extension rod (804) facing the external rod (815), and one end of the two return spring rods (813) is fixedly connected to the outer wall of the external rod (815).

5. A roadbed and pavement detection device based on intelligent sensors according to claim 4, characterized in that, The unfolding plate (802) has equidistant track grooves on both sides of the middle channel (818), and each track groove is slidably connected to an adjusting rod (805). Each adjusting rod (805) is fixedly connected to a connecting block (820) on the outer side wall away from the unfolding plate (802). A reset spring rod (819) is fixedly connected to the side of the connecting block (820) facing the unfolding plate (802), and one end of the reset spring rod (819) is fixedly connected to one side of the unfolding plate (802).

6. The roadbed and pavement detection device based on intelligent sensors according to claim 1, characterized in that, The vehicle frame (1) is fixedly connected to an unfolding rail (2), and the unfolding rail (2) is provided with an extension and widening mechanism (6). The extension and widening mechanism (6) includes two end frames (601) and two fixed-length slide rods (603). The unfolding rail (2) is internally slidably connected to two connecting slide rods (604), and the end frames (601) are fixedly connected to one end of the adjacent connecting slide rods (604).

7. A roadbed and pavement detection device based on intelligent sensors according to claim 6, characterized in that, The bottom of the unfolding rail (2) is fixedly connected to a middle block (606). Both sides of the middle block (606) are fixedly connected to push cylinders (607). The output ends of the two push cylinders (607) are fixedly connected to one side of the adjacent connecting slide rod (604). Two end docking rods (605) are fixedly connected to the opposite side of the two end frames (601). Each end docking rod (605) is fixedly connected to a docking insertion rod (610) on the side away from the end frame (601).

8. A roadbed and pavement detection device based on intelligent sensors according to claim 7, characterized in that, Both ends of the fixed-length slide bar (603) have mating slots (611), and an embedded rod (608) is inserted into the mating slot (611). One end of the embedded rod (608) is fixedly connected to an assembly rod (602). The end of the assembly rod (602) facing the mating rod (610) has a fitting slot (609), and the mating rod (610) is inserted into the fitting slot (609).

9. A roadbed and pavement detection device based on intelligent sensors according to claim 8, characterized in that, The top of the detection seat (3) is fixedly connected to two sliding frames (5), and the same intermediate connecting rod (12) is fixedly connected to the two sliding frames (5). The sliding frames (5) are slidably connected to the outer wall of the adjacent fixed-length sliding rod (603).

10. A roadbed and pavement detection device based on intelligent sensors according to claim 9, characterized in that, The sliding frame (5) has two operating slots (9) on the inner ring surface near the fixed length slide rod (603), and a hydraulic cylinder (11) is fixedly connected to the opposite side of the two operating slots (9). The output end of the two hydraulic cylinders (11) is fixedly connected to a positioning plate (10), and the positioning plate (10) is in contact with the outer wall of the fixed length slide rod (603).

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