A highway engineering asphalt pavement construction paving thickness detection device

Abstract

The application belongs to the technical field of highway construction detection, and specifically discloses a highway engineering asphalt pavement construction paving thickness detection device, which comprises a mounting frame, the bottom of both ends of the mounting frame is provided with a wheel frame, the bottom of the wheel frame is rotationally provided with a roller, the side of the mounting frame, which is opposite to the paver, is horizontally and fixedly provided with a clamping rail along the length direction, and the end of the clamping rail, which is opposite to the mounting frame, is provided with a groove plate; the side of the mounting frame, which is opposite to the paver, is also provided with a controllable-speed reciprocating translation mechanism, a static downward insertion detection mechanism and a synchronous chain driving mechanism. The forward movement of the paver is converted into the reverse and same-speed movement of the detection assembly, the static insertion and extraction of the detection rod relative to the road surface are realized through the speed offset, the defects of manual detection are overcome, the technical obstacles of the existing automatic devices are solved, the continuous detection of the loose paving thickness is realized in the automatic, high-precision and high-frequency modes, and the accurate tracing of data and position is realized.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of highway construction detection, and particularly relates to a device for detecting paving thickness of asphalt pavement in highway engineering. BACKGROUND

[0002] Asphalt pavement is the main pavement form in modern highway engineering, and the paving thickness of asphalt mixture is a crucial core parameter. At present, the detection methods for the thickness of asphalt pavement in the field can be mainly divided into two categories according to the detection time and the physical state of asphalt material.

[0003] Detection after compaction forming, this method is to drill core samples at specific positions on the pavement and measure the thickness after the asphalt pavement is completely cooled, hardened and compacted. Its inherent defects are extremely obvious: first, this is a destructive detection, which will leave holes on the perfect pavement; second, this detection has serious hysteresis, and the thickness deviation found cannot be corrected in time during the construction process; third, the core sampling operation is tedious, time-consuming, labor-intensive and costly, and the number of sampling points is limited.

[0004] Real-time detection during paving, that is, real-time thickness detection of asphalt mixture which is just paved and is in a high-temperature viscous plastic state during paving. First, the loose paving thickness of the asphalt mixture just after paving is measured, and then the final thickness after compaction forming is accurately converted according to the loose paving coefficient k determined by the test section or experience. This method takes advantage of the characteristics of high-temperature asphalt mixture that can self-level and heal after the measurement probe is removed, realizes non-destructive detection, and can theoretically perform large-area and high-density point measurement, which provides the possibility for real-time quality control, and therefore is more valuable for promotion.

[0005] However, there are still several technical problems to be solved in realizing this real-time detection. The most common way in the prior art is that the construction personnel hold an L-shaped measuring rod or similar simple tool, follow behind the paver, and manually measure by inserting and pulling out. This method has the following defects: the measurement personnel need to be close to the high-temperature asphalt mixture and its volatile gas, which poses a risk of burns and occupational health, and the labor intensity of multi-point detection is extremely great; if the measurement personnel are negligent or delayed due to other reasons, the temperature and viscosity of the asphalt mixture will change, causing the initial loose paving state to change, which affects the accurate application of the loose paving coefficient, and causes the final calculation result to be distorted; after the thickness is measured to be unqualified, it is difficult for the measurement personnel to quickly and accurately record the specific position of the unqualified section due to the continuous advancement of the paver, which brings difficulties to the subsequent correction work.

[0006] To overcome the shortcomings of manual measurement, some technical solutions attempt to integrate or mount the detection mechanism directly on the paver in order to realize automatic detection. However, the paver moves at a constant speed during operation. When the detection probe is vertically inserted into the asphalt mixture, the probe will move forward with the paver because the measuring instrument is connected to the paver. This relative movement causes the probe to plow a groove in the viscous asphalt mixture, which not only damages the road surface but also causes the probe to be damaged by a large horizontal drag force and bending moment. SUMMARY

[0007] To address the above problems, the present application provides a highway engineering asphalt pavement construction paving thickness detection device. The driving mechanism on the device is in rolling contact with the ground. The internal transmission mechanism converts the forward movement of the paver into the reverse and same speed movement of the detection assembly. The speed offset realizes the static insertion and extraction of the detection probe relative to the ground. This not only overcomes the shortcomings of manual detection but also solves the technical problems of existing automatic devices. It realizes automatic, high-precision, and high-frequency continuous detection of the paving thickness and precise tracing of data and position, greatly improving the construction quality control level.

[0008] The technical solutions adopted by the present application are as follows: The present application provides a highway engineering asphalt pavement construction paving thickness detection device, which comprises a mounting frame. The mounting frame is provided with wheel frames at the bottom of both ends. The wheel frames are rotatably provided with rollers at the bottom. A rail is fixedly arranged on the side of the mounting frame opposite to the paver along the length direction. A groove plate is arranged at the end of the rail opposite to the mounting frame. A controllable speed reciprocating translation mechanism, a static downward insertion detection mechanism, and a synchronous chain drive mechanism are further arranged on the side of the mounting frame opposite to the paver.

[0009] Further, the controllable speed reciprocating translation mechanism comprises a translation frame slidingly arranged in the rail. The translation frame is provided with an upper rack and a lower rack. An incomplete gear is rotatably arranged in the translation frame to alternately engage the upper rack and the lower rack.

[0010] Further, the static downward insertion detection mechanism comprises a lifting column arranged at the output end of the controllable speed reciprocating translation mechanism and a hollow probe arranged below the lifting column. The lifting column is provided with a hollow roller which is matched with the groove plate through a sliding groove.

[0011] Further, the synchronous chain drive mechanism comprises a driving shaft coaxially fixed with all the incomplete gears. The chain wheels coaxially arranged on the driving shaft are connected with the chain wheels coaxially arranged on the rollers through a chain transmission.

[0012] Further, the groove plate is provided with a descending chute, an ascending chute and a horizontal chute which constitute an isosceles triangular communication path, the horizontal chute is above the descending chute and the ascending chute and is horizontally arranged, the groove bottom of the horizontal chute at the connection with the descending chute is higher than the groove bottom of the descending chute, and the groove bottom of the horizontal chute at the connection with the ascending chute is lower than the groove bottom of the ascending chute.

[0013] Further, the first inner shaft is transversely arranged on the lifting column, the hollow roller is sleeved on the first inner shaft, and the first compression spring is arranged between the hollow roller and the lifting column to drive the hollow roller to tightly adhere to the groove bottom of the descending chute, the ascending chute and the horizontal chute.

[0014] Further, the driving shaft tightly adheres to all the clamping rails, the driving shaft is rotationally supported by the support rod arranged on the mounting frame, the incomplete gear rotates around the driving shaft as the axis line and is arranged on the clamping rail, and the meshing radius of the incomplete gear with the upper rack and the lower rack is the same as the radius of the roller.

[0015] Further, one end of the translation frame is provided with an output rod, the output rod is provided with a sliding sleeve, the lifting column is clamped and arranged in the sliding sleeve, the lower end of the lifting column is provided with a first spring seat, the second inner shaft is coaxially arranged at the lower end of the first spring seat, the hollow probe rod is clamped and arranged on the second inner shaft, the upper end of the hollow probe rod is provided with a second spring seat, and the second compression spring is arranged between the first spring seat and the second spring seat.

[0016] Further, the static downward insertion detection mechanism further comprises a first displacement sensor and a second displacement sensor, the first displacement sensor is arranged on the first spring seat and is used for monitoring the displacement of the second spring seat relative to the first spring seat, and the second displacement sensor is arranged on the second spring seat and is used for monitoring the distance between the second spring seat and the output rod.

[0017] Further, the support rod is provided with a rotary encoder, the rotary encoder is coaxially connected with the driving shaft and is used for monitoring the total rotation angle of the driving shaft.

[0018] Further, the upper rack and the lower rack are respectively arranged on the upper side and the lower side of the incomplete gear and are staggered in the horizontal direction, the upper rack is closer to the mounting frame than the lower rack, and the incomplete gear is only provided with continuous gear teeth in one angle range.

[0019] Further, when the incomplete gear rotates, the gear teeth thereof first mesh with the upper rack to drive the translation frame to translate towards the mounting frame, at the moment when the incomplete gear is separated from the upper rack, the gear teeth mesh with the lower rack to drive the translation frame to translate away from the mounting frame, and in the complete stroke of the translation frame away from the mounting frame, the hollow roller moves from the uppermost end of the descending chute along the descending chute and the ascending chute to the uppermost end of the ascending chute.

[0020] Further, the first displacement sensor monitors the contact of the lower end of the hollow probe rod with the asphalt pavement to control triggering of the second displacement sensor to start recording.

[0021] The application has the following beneficial effects by adopting the above structure:

[0022] (1) The application converts the rotation of the ground-contacting roller into the precise translation movement of the controllable speed reciprocating translation mechanism through the synchronous chain drive mechanism, and the core is that the horizontal speed of the static down-insertion detection mechanism relative to the ground is zero in the operation stroke of down-insertion and pulling out the hollow probe rod by the ingenious cooperation of the incomplete gear with the upper and lower racks and the equal design of the meshing radius and the roller radius. The realization of the relative static fundamentally solves the technical problem of damaging the pavement and equipment caused by the probe rod plowing out the groove in the asphalt material due to the synchronous advancement of the paving machine in the existing vehicle-mounted automatic device, and the mechanical linkage mode can adapt to any change of the advancing speed of the paving machine in real time, ensuring the stability and reliability of the detection process, and realizing the automatic, high-frequency and large-area continuous non-destructive detection.

[0023] (2) The application liberates the detection personnel from the high-temperature and high-risk operation environment behind the paving machine through the overall automatic mechanical structure, completely avoids the scalding and occupational health risks caused by manual measurement, greatly reduces the labor intensity, and more importantly, the automatic cyclic detection ensures that each measurement is immediately performed after the asphalt mixture is laid, ensures the high consistency of the physical state (temperature, viscosity) of the measured material, and thus ensures the accuracy of the application of the loose paving coefficient, overcoming the major defect of distorted measurement results caused by manual operation delay.

[0024] (3) The application realizes the precise tracing of the detection data and the construction position, provides strong technical support for real-time quality control and precise correction, and realizes real-time monitoring and accumulation of the advancing distance of the paving machine through the rotary encoder arranged on the drive shaft, and binds the thickness value measured by the first displacement sensor and the second displacement sensor with the advancing distance, so that a continuous thickness distribution map containing precise position information along the longitudinal direction of the road can be generated. Once an unqualified section is found, the management personnel can immediately locate it according to the corresponding mileage data, so as to realize rapid and accurate correction, and solve the problem of difficult accurate recording of the position of unqualified points in manual measurement. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a first three-dimensional structure schematic diagram of a highway engineering asphalt pavement construction paving thickness detection device.

[0026] Figure 2A second perspective structural schematic view of the asphalt pavement construction paving thickness detection device for highway engineering.

[0027] Figure 3 A front view of the asphalt pavement construction paving thickness detection device for highway engineering.

[0028] Figure 4 A Figure 1 A zoomed-in view of part A.

[0029] Figure 5 A Figure 1 A zoomed-in view of part B.

[0030] Figure 6 A second perspective structural schematic view of the asphalt pavement construction paving thickness detection device for highway engineering.

[0031] Figure 7 A second perspective structural schematic view of the asphalt pavement construction paving thickness detection device for highway engineering.

[0032] Figure 8 A structural schematic view of the groove plate of the asphalt pavement construction paving thickness detection device for highway engineering.

[0033] Figure 9 A structural schematic view of the groove plate of the asphalt pavement construction paving thickness detection device for highway engineering.

[0034] Figure 10 A working principle diagram of the asphalt pavement construction paving thickness detection device for highway engineering.

[0035] 1, mounting frame, 11, wheel frame, 12, support rod, 13, roller, 2, rail clamp, 3, controllable speed reciprocating translation mechanism, 31, translation frame, 32, upper rack, 33, lower rack, 34, incomplete gear, 35, output rod, 36, sliding sleeve, 4, groove plate, 41, descending chute, 42, ascending chute, 43, horizontal chute, 5, static downward insertion detection mechanism, 51, lifting column, 511, first spring seat, 512, first inner shaft, 52, hollow roller, 53, first compression spring, 54, second inner shaft, 55, hollow probe rod, 551, second spring seat, 56, second compression spring, 57, first displacement sensor, 58, second displacement sensor, 6, synchronous chain drive mechanism, 61, drive shaft, 62, sprocket, 63, chain, 64, rotary encoder.

[0036] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of the specification, illustrate embodiments of the application and are used to explain the application, but are not intended to limit the application. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0038] In the description of the application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0039] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 The present application proposes a highway engineering asphalt pavement construction paving thickness detection device, the overall structure of which is supported by a mounting frame 1, which can be reliably fixed to the tail of the paver through bolts and other fasteners. Symmetrical wheel frames 11 are provided at the bottom of both ends of the mounting frame 1, and a roller 13 is rotatably provided at the bottom of each wheel frame 11. In actual operation, the mounting frame 1 is adjusted so that the rollers 13 are pressed against the hard base layer on both sides of the paver where no asphalt mixture has been laid.

[0040] The core transmission and execution mechanism of the device are arranged on the mounting frame 1, and a plurality of groups of clamping rails 2 are fixed horizontally along the length direction on the side of the mounting frame 1 opposite to the advancing direction of the paver, which provide accurate guidance for the subsequent translation mechanism. A groove plate 4 is also fixed at the end of each clamping rail 2 opposite to the mounting frame 1, which is a track for realizing the lifting movement of the detection assembly.

[0041] The synchronous chain drive mechanism 6 is the power source of the whole device, which includes a driving shaft 61 coaxially fixed with all the incomplete gears 34, which is rotationally supported by the support rod 12 fixed on the mounting frame 1 to ensure the stability and accuracy of its rotation. A sprocket 62 is coaxially arranged on the driving shaft 61, and a sprocket 62 is also coaxially arranged on the roller 13. The two are transmission connected by a chain 63. When the paver advances, the roller 13 rotates due to the static friction with the ground. The rotation is accurately transmitted to the driving shaft 61 through the transmission of the chain 63 and the sprocket 62, so that the driving shaft 61 rotates at an angular velocity synchronous with the rotation of the roller 13.

[0042] The controllable speed reciprocating translation mechanism 3 is used to generate a translation motion equal in size and opposite in direction to the advancing speed of the paver. The mechanism includes a translation frame 31 slidingly arranged in the rail 2. An upper rack 32 and a lower rack 33 are arranged on the translation frame 31 along its movement direction. The two are arranged on the upper and lower sides of the incomplete gear 34 and are staggered in the horizontal direction. Specifically, the upper rack 32 is closer to the paver than the lower rack 33. The incomplete gear 34 is rotationally arranged on the rail 2 with the driving shaft 61 as the axis. It is provided with continuous teeth only in a specific angle range, and the rest is a smooth circular surface. Crucially, the engagement radius of the incomplete gear 34 with the upper and lower racks 32 and 33 is accurately designed to be the same as the radius of the roller 13.

[0043] When the driving shaft 61 is rotated, the incomplete gear 34 rotates. Its toothed part will first engage with the upper rack 32 to drive the translation frame 31 to translate towards the advancing direction of the paver. When the toothed part of the incomplete gear 34 rotates to disengage from the upper rack 32, its toothed part will immediately engage with the lower rack 33 due to the staggered arrangement of the racks, thereby driving the translation frame 31 to translate away from the advancing direction of the paver. Through this design, the translation frame 31 realizes reciprocating translation relative to the mounting frame 1. Since the engagement radius is equal to the radius of the roller 13, the retreating speed of the translation frame 31 relative to the mounting frame 1 is exactly equal to the advancing speed of the mounting frame 1 (i.e. the paver). After the speed vectors of the two are superimposed, the horizontal speed of the translation frame 31 relative to the ground is zero in the retreating stroke, i.e. it is in a horizontal static state.

[0044] The static thickness detection mechanism 5 completes thickness detection when the translation frame 31 is stationary relative to the ground. The main body of the mechanism is a lifting column 51 arranged at the output end of the controllable speed reciprocating translation mechanism 3. One end of the translation frame 31 is provided with an output rod 35, and the output rod 35 is provided with a sliding sleeve 36. The lifting column 51 is clamped and penetrates the sliding sleeve 36, realizing synchronous horizontal movement with the translation frame 31 and vertical lifting of itself.

[0045] The lifting movement of the lifting column 51 is realized by the cooperation of the hollow roller 52 thereon and the groove plate 4, the first inner shaft 512 is transversely arranged on the lifting column 51, the hollow roller 52 is sleeved on the first inner shaft 512, and the first compression spring 53 is arranged between the hollow roller 52 and the lifting column 51, which always drives the hollow roller 52 to move tightly against the groove bottom of each sliding groove on the groove plate 4, and the descending sliding groove 41, the ascending sliding groove 42 and the horizontal sliding groove 43 constituting a one-way circulation path are arranged on the groove plate 4, the three sliding grooves are communicated to constitute an isosceles triangle path, and the horizontal sliding groove 43 is arranged at the top and horizontally.

[0046] The detection part of the static downward insertion detection mechanism 5 is composed of the hollow detection rod 55 and its associated components, the lower end of the lifting column 51 is provided with the first spring seat 511, the coaxial second inner shaft 54 is fixedly arranged at the lower end of the first spring seat 511, the hollow detection rod 55 is sleeved and clamped on the second inner shaft 54, the upper end of the hollow detection rod 55 is provided with the second spring seat 551, and the second compression spring 56 is arranged between the first spring seat 511 and the second spring seat 551, the spring has a large rigidity, and is mainly used for driving the hollow detection rod 55 to insert the asphalt material while providing buffering.

[0047] In order to realize accurate measurement, the mechanism further comprises the first displacement sensor 57 and the second displacement sensor 58, the first displacement sensor 57 is arranged on the first spring seat 511 and used for monitoring the slight displacement of the second spring seat 551 relative to the first spring seat 511, and the second displacement sensor 58 is arranged on the second spring seat 551 and used for monitoring the distance between the second spring seat 551 and the output rod 35.

[0048] In order to realize accurate tracing of data and position, the rotary encoder 64 is further arranged on the support rod 12, the rotary encoder 64 is coaxially connected with the driving shaft 61 and used for monitoring and accumulating the total rotation angle of the driving shaft 61 in real time.

[0049] The specific working process is as follows:

[0050] Starting and synchronization: after the device is fixed at the tail of the paver, the paver starts to advance, the rollers 13 on both sides roll on the hard base layer, the driving shaft 61 and the incomplete gear 34 are synchronously rotated through the synchronous chain driving mechanism 6, and the rotary encoder 64 starts to record the advancing distance of the paver.

[0051] Static static insertion: not complete gear 34 rotation, drive translation frame 31 reciprocating motion, when the translation frame 31 into the reverse stroke (i.e. away from the paver), it is with static static insertion detection mechanism 5 as a whole relative to the ground in a horizontal static state, at this time, the controllable speed reciprocating translation mechanism 3 of the reverse complete stroke is precisely designed to correspond to the hollow roller 52 from the lower chute 41 most upper end along the lower chute 41 and the upper chute 42 movement to the upper chute 42 most upper end of the path, due to the height difference of the groove bottom blocking effect, hollow roller 52 can first enter the lower chute 41, drive lifting column 51 and hollow probe rod 55 vertical down insertion.

[0052] Contact sensing and measurement trigger: hollow probe rod 55 in the process of falling, its lower end contact to the upper surface of the high temperature asphalt mixture, contact instant, the asphalt material to the probe rod generated upward support force, resulting in the second compression spring 56 is slightly compressed, hollow probe rod 55 along with its second spring seat 551 relative to the second inner shaft 54 and the first spring seat 511 occurs a small upward movement, the relative displacement of this moment is captured by the first displacement sensor 57, here uses a kind of logic trigger mechanism, the function of the first displacement sensor 57 (such as micro switch, hall sensor or small displacement sensor) is similar to a "touch" switch, it is not responsible for measuring value, only responsible for detecting "contact" this event, once the detection of the preset small displacement threshold, its control circuit immediately output a trigger signal, the signal is sent to the control end of the second displacement sensor 58, as its "start recording" instruction, this kind of master-slave type sensor cooperative work mode in the field of automation is mature technology, has very high response speed and reliability.

[0053] Through measurement and data acquisition: after receiving the trigger signal, the second displacement sensor 58 starts recording its readings, at the same time, due to the second compression spring 56 has greater stiffness, and the lifting column 51 is still continuing to fall, hollow probe rod 55 is driven to penetrate the layer of viscous asphalt mixture, when the tip of the hollow probe rod 55 contacts the hard base layer below, it is subjected to a large reaction force, can not continue to down insertion, at this time, the reading of the second displacement sensor 58 stops increasing, and stabilizes at a maximum value, this maximum value is the asphalt mixture loose thickness of the measurement point, and the second compression spring 56 begins to be compressed greatly.

[0054] Pull out and reset: then the hollow roller 52 moves to the junction of the lower chute 41 and the upper chute 42, it begins to enter the upper chute 42, drive lifting column 51 and hollow probe rod 55 vertically upward, finally pull it out from the asphalt mixture, since the process is still in the reverse stroke of the translation frame 31, therefore the pull out process is also relative to the ground static, avoid the drag damage to the road surface, when the hollow roller 52 reaches the top of the upper chute 42, a complete measurement is finished.

[0055] Circulation and data traceability: the backward stroke of the translation frame 31 ends, and the forward stroke begins. The hollow roller 52 can only move back to the original position in the horizontal sliding groove 43 under the guidance of the height difference of the groove bottom, and is ready for the next measurement cycle. In each measurement cycle, the control system associates and binds the final thickness value recorded by the second displacement sensor 58 with the total forward distance value recorded by the rotary encoder 64 at that time, forming a data pair of (forward distance, paving thickness). Through continuous measurement cycles, the device can generate a high-density thickness data chain along the longitudinal direction of the road. Construction management personnel can view this data in real time. Once unqualified thickness values are found, they can accurately locate the unqualified section on the road surface according to the corresponding distance readings, so as to make timely adjustments or process adjustments, greatly improving the accuracy and timeliness of construction quality control.

[0056] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0057] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application.

[0058] The above describes the present application and its embodiments, which are not limited, and the embodiments shown in the drawings are only one of the embodiments of the present application, and the actual structure is not limited thereto. In general, if a person skilled in the art is inspired by it, without departing from the purpose of the present application, without creative design, similar structure and embodiments of the technical solution can be designed and belong to the protection scope of the present application.

Claims

1. A highway engineering asphalt pavement construction paving thickness detection device, comprising a mounting frame (1), the bottom of both ends of the mounting frame (1) is provided with a wheel frame (11), the bottom of the wheel frame (11) is rotatably provided with a roller (13), characterized in that: The mounting frame (1) is provided with a rail clamping (2) on the side opposite to the paver along the length direction, and the end of the rail clamping (2) opposite to the mounting frame (1) is provided with a groove plate (4); the mounting frame (1) is further provided with a controllable speed reciprocating translation mechanism (3), a static downward insertion detection mechanism (5) and a synchronous chain drive mechanism (6) on the side opposite to the paver; The controllable speed reciprocating translation mechanism (3) comprises a translation frame (31) slidingly arranged in the rail clamping (2), and the translation frame (31) is provided with an upper rack (32) and a lower rack (33); and the translation frame (31) is rotatably provided with an incomplete gear (34) for alternately engaging the upper rack (32) and the lower rack (33). The static downward insertion detection mechanism (5) comprises a lifting column (51) arranged at the output end of the controllable speed reciprocating translation mechanism (3) and a hollow probe rod (55) arranged below the lifting column (51); and the lifting column (51) is provided with a hollow roller (52) for achieving sliding groove cooperation with the groove plate (4). The synchronous chain drive mechanism (6) comprises a drive shaft (61) coaxially fixed with all the incomplete gears (34); and the chain wheel (62) coaxially arranged on the drive shaft (61) is in transmission connection with the chain wheel (62) coaxially arranged on the roller (13) through a chain (63). The groove plate (4) is provided with a descending sliding groove (41), an ascending sliding groove (42) and a horizontal sliding groove (43) forming an isosceles triangle communication path; the horizontal sliding groove (43) is arranged above the descending sliding groove (41) and the ascending sliding groove (42) and is horizontally arranged; the groove bottom of the horizontal sliding groove (43) at the connection position with the descending sliding groove (41) is higher than the groove bottom of the descending sliding groove (41); and the groove bottom of the horizontal sliding groove (43) at the connection position with the ascending sliding groove (42) is lower than the groove bottom of the ascending sliding groove (42). The backward complete stroke of the controllable speed reciprocating translation mechanism (3) is accurately designed to correspond to the path that the hollow roller (52) moves from the uppermost end of the descending sliding groove (41) along the descending sliding groove (41) and the ascending sliding groove (42) to the uppermost end of the ascending sliding groove (42).

2. The highway engineering asphalt pavement construction paving thickness detection device according to claim 1, characterized in that: The lifting column (51) is transversely provided with a first inner shaft (512), the hollow roller (52) is sleeved on the first inner shaft (512), and the first compression spring (53) is arranged between the hollow roller (52) and the lifting column (51); and the first compression spring (53) drives the hollow roller (52) to tightly abut the groove bottom of the descending sliding groove (41), the ascending sliding groove (42) and the horizontal sliding groove (43).

3. The highway engineering asphalt pavement construction paving thickness detection device according to claim 2, characterized in that: The drive shaft (61) tightly penetrates all the rail clamping (2), and the drive shaft (61) is rotationally supported by the support rod (12) arranged on the mounting frame (1); the incomplete gear (34) is rotationally arranged on the rail clamping (2) with the drive shaft (61) as the axis; and the meshing radius of the incomplete gear (34) with the upper rack (32) and the lower rack (33) is the same as the radius of the roller (13).

4. The highway engineering asphalt pavement construction paving thickness detection device according to claim 3, characterized in that: The translation frame (31) is provided with an output rod (35) at one end, the output rod (35) is provided with a sliding sleeve (36), the lifting column (51) is engaged and passes through the sliding sleeve (36), the lower end of the lifting column (51) is provided with a first spring seat (511), the lower end of the first spring seat (511) is coaxially fixedly provided with a second inner shaft (54), the hollow probe rod (55) is slidingly engaged on the second inner shaft (54), the upper end of the hollow probe rod (55) is provided with a second spring seat (551), and the second compression spring (56) is arranged between the first spring seat (511) and the second spring seat (551).

5. The highway engineering asphalt pavement construction paving thickness detection device according to claim 4, characterized in that: The static downward insertion detection mechanism (5) further comprises a first displacement sensor (57) and a second displacement sensor (58), the first displacement sensor (57) is arranged on the first spring seat (511) and used for monitoring the displacement of the second spring seat (551) relative to the first spring seat (511); and the second displacement sensor (58) is arranged on the second spring seat (551) and used for monitoring the distance between the second spring seat (551) and the output rod (35).

6. The highway engineering asphalt pavement construction paving thickness detection device according to claim 5, characterized in that: The rotating encoder (64) is arranged on the support rod (12) and coaxially connected with the driving shaft (61) and used for monitoring the total rotation angle of the driving shaft (61).

7. The highway engineering asphalt pavement construction paving thickness detection device according to claim 6, characterized in that: The upper rack (32) and the lower rack (33) are arranged on the upper and lower sides of the incomplete gear (34) and staggered in the horizontal direction, the upper rack (32) is closer to the mounting frame (1) than the lower rack (33), and the incomplete gear (34) is provided with continuous teeth only in one angle range.

8. The highway engineering asphalt pavement construction paving thickness detection device according to claim 7, characterized in that: When the incomplete gear (34) rotates, the teeth thereof are first engaged with the upper rack (32) to drive the translation frame (31) to translate towards the mounting frame (1), and when the incomplete gear (34) is separated from the upper rack (32), the teeth are engaged with the lower rack (33) to drive the translation frame (31) to translate away from the mounting frame (1); in the complete stroke of the translation frame (31) away from the mounting frame (1), the hollow roller (52) moves from the upper end of the descending chute (41) to the upper end of the ascending chute (42) along the descending chute (41) and the ascending chute (42).

9. The highway engineering asphalt pavement construction paving thickness detection device according to claim 8, characterized in that: The first displacement sensor (57) controls the second displacement sensor (58) to start recording when the lower end of the hollow probe rod (55) contacts the asphalt pavement.

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