A dual-axis test vehicle for the mobile detection of the dynamic characteristics of bridges

Abstract

The present invention relates to the technical field of bridge engineering, and in particular to a two-axis test vehicle for mobile detection of bridge dynamic characteristics. The two-axis test vehicle for mobile detection of bridge dynamic characteristics includes a vehicle running system, a component telescopic system, a structure support system, and a sensing and acquisition system; the vehicle running system is arranged on the component telescopic system, the structure support system is arranged on the component telescopic system, and the sensing and acquisition system is arranged on the component support system; the vehicle running system is a two-axis vehicle running system. The two-axis test vehicle adopts a two-axis vehicle running system, which can provide the stability of vehicle driving, reduce the influence of vehicle unevenness on bridge detection. In addition, the vehicle running system is arranged on the component telescopic system, which can be adjusted according to different road conditions, improving the applicability of the test vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge engineering, and particularly to a dual-axis test vehicle for mobile detection of bridge dynamic characteristics. Background Art

[0002] China has a long history of bridges and retains the largest number of bridges in the world. At the same time, new bridges are constantly being built to meet the increasing transportation demands. According to the 2021 industry statistical bulletin released by the Ministry of Transport on May 25, 2022, there are 961,100 highway bridges in the country, with a total length of 73.8021 million linear meters, an increase of 48,400 bridges and 7.5166 million linear meters respectively compared with the end of the previous year. Among them, there are 7,417 extra-large bridges with a total length of 13.4787 million linear meters, and 134,500 large bridges with a total length of 37.1589 million linear meters. Timely, rapid, and large-scale detection and evaluation of these bridges are of great significance for mastering the health status of bridges, reasonably arranging maintenance resources, and improving the operation safety and service life of the bridge group on the road network.

[0003] In the past, direct measurement methods were used for bridge detection. This method requires a large number of sensors to be arranged on the bridge, which is not only expensive but also has poor reusability. Currently, the earliest proposed and tested bridge inspection vehicle model in the relevant research field is the bridge full-state multi-functional intelligent health monitoring system. For example, the patent application No. 201810739182.2 discloses a bridge full-state multi-functional intelligent health monitoring system. The core part of this system is a measurement vehicle equipped with a signal collection system. The measurement vehicle picks up bridge dynamic signals by moving or staying still on the bridge during detection, and processes the signal data through a signal processing device to finally obtain the health status of the bridge. The measurement vehicle model of this system uses a single-axis vehicle model. After testing, there is no frequency when the vehicle is stationary, and the highest frequency can reach 20 Hz. The vehicle frequency and bridge frequency can be well compared, distinguished, and identified, so it can be widely used in bridge detection. The single-axis vehicle model adopted by this system has main application problems, such as poor vehicle stability making installation more troublesome, the running speed of the single-axis vehicle being limited otherwise the tires are likely to leave the ground, and the road surface roughness having a great impact on the test effect, etc. There may be difficulties in actual engineering applications. Summary of the Invention

[0004] The purpose of the present invention is to provide a dual-axis test vehicle for mobile detection of bridge dynamic characteristics, which can solve the problems existing in the prior art.

[0005] The present invention provides a dual-axis test vehicle for mobile detection of bridge dynamic characteristics, which includes a vehicle running system, a component telescoping system, a structure support system, and a sensing and acquisition system.

[0006] The vehicle running system is arranged on the component telescopic system, the structural support system is arranged on the component telescopic system, and the sensing and acquisition system is arranged on the component support system;

[0007] The vehicle running system is a two-axle vehicle running system.

[0008] Preferably, the vehicle running system includes four running tires;

[0009] The two-axle wheel system includes two axles, and each axle includes two running tires arranged in parallel;

[0010] The running tire includes a tire, a wheel hub, a universal joint, a wheel hub bearing, and a half shaft connecting member;

[0011] The tire is arranged on the wheel hub, a universal joint is installed on the wheel hub, the universal joint is connected to the wheel hub bearing through a spline, and the half shaft connecting member is assembled and combined with the wheel hub bearing.

[0012] Preferably, the component telescopic system includes two transverse telescopic systems and one longitudinal telescopic system;

[0013] The two transverse telescopic systems are respectively arranged at both ends of the longitudinal telescopic system, and one running tire is arranged at each end of each transverse telescopic system.

[0014] Preferably, the transverse telescopic system includes a rotating telescopic shaft and a transverse axle housing;

[0015] The rotating telescopic shaft includes a rotating bridge and a telescopic round rod, and the telescopic round rod is embedded in the rotating bridge;

[0016] The rotating telescopic shaft is connected to the transverse axle housing through a rolling bearing, and the telescopic round rod is connected to the half shaft connecting member.

[0017] Preferably, the telescopic round rod includes a solid rod and a sleeve, the solid rod is inserted into the sleeve, and the solid rod is connected to the half shaft connecting member.

[0018] Preferably, the longitudinal telescopic system includes a fixed telescopic shaft and a longitudinal axle housing;

[0019] The fixed telescopic shaft includes a fixed bridge, a central solid round rod, and a telescopic round rod;

[0020] The central solid round rod is embedded in the center of the fixed bridge, and a plurality of telescopic round rods are embedded in the fixed bridge, and the plurality of telescopic round rods are arranged around the central solid round rod;

[0021] One fixed telescopic shaft is arranged at each end of the longitudinal axle housing, and the telescopic round rod is connected to the transverse axle housing through a T-shaped joint fitting.

[0022] Preferably, the component support system includes a chassis frame structure;

[0023] The chassis frame structure includes a longitudinal axis chassis, a frame - type chassis, and a chassis receiving platform;

[0024] The longitudinal axis chassis includes a longitudinal circular half - shaft hollow shell;

[0025] The frame - type chassis is a frame - type structure composed of longitudinal reinforcing rods with rectangular cross - sections and rectangular transverse connecting rods;

[0026] The chassis receiving platform is a flat - plate structure;

[0027] The longitudinal axis chassis is fixed to the lower side of the frame - type chassis, and the chassis receiving platform is fixed to the upper side of the frame - type chassis;

[0028] The longitudinal circular half - shaft hollow shell is fixedly connected to the longitudinal axle housing.

[0029] Preferably, the component support system further includes a vehicle - body load - bearing structure;

[0030] The vehicle - body load - bearing structure includes a bearing platform and a limiter;

[0031] The bearing platform includes a first - layer bearing platform and a second - layer bearing platform;

[0032] The first - layer bearing platform includes an upper panel and a grid - type grid rod arranged on the upper panel;

[0033] The second - layer bearing platform includes a flat plate and a transverse axis chassis arranged at the end of the flat plate;

[0034] Limiters are arranged at the four corners of the upper panel, and the upper panel is connected to the chassis receiving platform through the limiters. The flat plate is arranged between the upper panel and the chassis receiving platform, and the transverse axis chassis is fixedly connected to the transverse axle housing.

[0035] Preferably, the component support system further includes a housing support structure;

[0036] The housing support structure includes a telescopic side shell, a telescopic top shell, a front vehicle protection shell, and a rear vehicle protection shell;

[0037] Telescopic side shells are arranged on both sides of the test vehicle, a telescopic top shell is arranged at the top, and a front vehicle protection shell and a rear vehicle protection shell are respectively arranged at the front and rear sections of the test vehicle.

[0038] Preferably, the sensing and acquisition system includes an acceleration sensor, a dynamic signal acquisition system, and a sensing line; the acceleration sensor is installed at the reserved platform position of the axle housing of the transverse telescopic system and the longitudinal telescopic system, and the dynamic signal acquisition system is fixedly installed on the first layer of the bearing platform of the vehicle load-bearing structure. The acceleration sensor is connected to the dynamic signal acquisition system through the sensing line to form the entire sensing and acquisition system.

[0039] Beneficial effects:

[0040] The two-axle test vehicle adopts a two-axle vehicle running system, which can provide the stability of vehicle driving, reduce the impact of vehicle unevenness on bridge detection. In addition, the vehicle running system is arranged on the component telescopic system and can be adjusted according to different road conditions, improving the applicability of the test vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0042] Figure 1 Schematic diagram of the three-dimensional structure of the test vehicle provided by the specific embodiment of the present invention;

[0043] Figure 2 Schematic diagram of the structure of the component telescopic system provided by the specific embodiment of the present invention;

[0044] Figure 3 For Figure 2 Partial enlarged view of "I";

[0045] Figure 4 For Figure 2 Partial enlarged view of "H";

[0046] Figure 5 Schematic diagram of the disassembled state of the test vehicle provided by the specific embodiment of the present invention.

[0047] Description of the reference numerals:

[0048] 1: Vehicle running system, 2: Component telescopic system, 3: Structural support system, 4: Sensing and acquisition system;

[0049] 11: Tire, 12: Wheel hub;

[0050] 21: Transverse axle housing, 22: Rotating bridge, 23: Telescopic round rod, 24: Longitudinal axle housing, 25: Fixed bridge;

[0051] 31: Chassis frame structure;

[0052] 311: Longitudinal axis chassis, 312: Frame chassis, 313: Chassis receiving platform;

[0053] 32: Body load-bearing structure;

[0054] 321: First-layer bearing platform, 322: Second-layer bearing platform, 323: Limiter;

[0055] 33: Shell support structure;

[0056] 331: Telescopic side shell, 332: Telescopic top shell, 333: Front vehicle protection shell, 334: Rear vehicle protection shell. Detailed implementation mode

[0057] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0058] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0059] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined. In addition, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] Such as Figures 1 to 5As shown in the figure, this embodiment provides a biaxial test vehicle for the mobile detection of the dynamic characteristics of bridges, which includes a vehicle running system 1, a component telescopic system 2, a structure support system 3, and a sensing and acquisition system 4.

[0061] The vehicle running system is arranged on the component telescopic system 2, the structure support system 3 is arranged on the component telescopic system 2, the sensing and acquisition system 4 is arranged on the component support system, and the vehicle running system is a two-axle vehicle running system.

[0062] In this embodiment, the biaxial test vehicle adopts a two-axle vehicle running system, which can provide the stability of vehicle driving, reduce the influence of vehicle unevenness on bridge detection. In addition, the vehicle running system is arranged on the component telescopic system 2, which can be adjusted according to different road conditions, improving the applicability of the test vehicle.

[0063] Vehicle running system 1

[0064] The vehicle running system 1 includes four running tires 11.

[0065] The two-axle wheel system includes two axles, and each axle includes two parallel running tires 11.

[0066] The running tire 11 includes a tire 11, a wheel hub 12, a universal joint, a wheel hub 12 bearing, and a half shaft connecting member.

[0067] The tire 11 is arranged on the wheel hub 12, a universal joint is installed on the wheel hub 12, the universal joint is connected to the wheel hub 12 bearing through a spline, and the half shaft connecting member is assembled and combined with the wheel hub 12 bearing.

[0068] Component telescopic system 2

[0069] The component telescopic system 2 includes two transverse telescopic systems and one longitudinal telescopic system. The two transverse telescopic systems are respectively arranged at both ends of the longitudinal telescopic system, and one running tire 11 is arranged at both ends of each transverse telescopic system.

[0070] The transverse telescopic system can telescope in the transverse direction, and the longitudinal telescopic system can telescope in the longitudinal direction.

[0071] The transverse telescopic system includes a rotating telescopic shaft and a transverse axle housing 21.

[0072] The rotating telescopic shaft includes a rotating bridge 22 and a telescopic round rod 23. The telescopic round rod 23 is embedded on the rotating bridge 22. The rotating telescopic shaft is connected to the transverse axle housing 21 through a rolling bearing, and the telescopic round rod 23 is connected to the half shaft connecting member.

[0073] A limiter 323 is arranged at the position of the rotating bridge 22 corresponding to the telescopic round rod 23 for limiting the position of the telescopic round rod 23.

[0074] The telescopic round rod 23 includes a solid rod and a sleeve. The solid rod is inserted into the sleeve and is connected to the half-axle connecting member.

[0075] The lateral telescopic system can be telescopically adjusted laterally. It can be achieved by the telescopic movement of the telescopic round rod 23 relative to the rotating bridge 22 and / or the telescopic movement of the solid rod relative to the sleeve.

[0076] A lateral telescopic system includes two symmetrically arranged rotating telescopic shafts and a lateral bridge housing 21. Each rotating telescopic shaft is connected to a traveling tire 11. That is, the two symmetrically arranged rotating telescopic shafts and the traveling tires 11 form an axle of the test vehicle.

[0077] The longitudinal telescopic system includes a fixed telescopic shaft and a longitudinal bridge housing 24. The fixed telescopic shaft includes a fixed bridge 25, a central solid round rod, and a telescopic round rod 23.

[0078] The central solid round rod is embedded in the central position of the fixed bridge 25. Multiple telescopic round rods 23 are embedded in the fixed bridge 25 and are arranged around the central solid round rod. The structural strength of the fixed telescopic shaft can be improved by the arrangement of the central solid round rod.

[0079] A fixed telescopic shaft is provided at both ends of the longitudinal bridge housing 24. The telescopic round rod 23 is connected to the lateral bridge housing 21 through a T-shaped joint fitting.

[0080] The telescopic round rod 23 includes a solid rod and a sleeve. The solid rod is inserted into the sleeve. The solid rod of the fixed telescopic shaft is connected to the lateral bridge housing 21 through a T-shaped joint fitting.

[0081] The longitudinal telescopic system is telescoped by the telescopic movement of the telescopic round rod 23 relative to the fixed bridge 25 and / or the telescopic movement of the solid rod of the fixed telescopic shaft relative to the sleeve.

[0082] Component support system

[0083] The component support system includes a chassis frame structure 31.

[0084] The chassis frame structure 31 includes a longitudinal axle underframe 311, a frame-type chassis 312, and a chassis receiving platform 313. The longitudinal axle underframe 311 includes a longitudinal round half-axle hollow shell.

[0085] The frame-type chassis 312 is a frame structure composed of longitudinal reinforcing rods with a rectangular cross-section and rectangular transverse connecting rods.

[0086] The chassis receiving platform 313 is a flat plate structure.

[0087] The longitudinal axle underframe is fixed to the lower side of the frame-type chassis 312, and the chassis receiving platform 313 is fixed to the upper side of the frame-type chassis 312.

[0088] The longitudinal round half-axle hollow shell is fixedly connected to the longitudinal bridge housing 24.

[0089] The component support system further includes a vehicle body load-bearing structure 32.

[0090] The vehicle body load-bearing structure 32 includes a load-bearing platform and a limiter 323.

[0091] The load-bearing platform includes a first-layer load-bearing platform 321 and a second-layer load-bearing platform 322. The first-layer load-bearing platform 321 includes an upper panel and grid bars arranged in a grid pattern on the upper panel.

[0092] The second-layer load-bearing platform 322 includes a flat plate and a transverse axle chassis arranged at the end of the flat plate.

[0093] Limiters 323 are arranged at the four corners of the upper panel. The upper panel is connected to the chassis bearing platform 313 through the limiters 323. The flat plate is arranged between the upper panel and the chassis bearing platform 313. The transverse axle chassis is fixedly connected to the transverse axle housing 21.

[0094] The component support system further includes a housing support structure 33.

[0095] The housing support structure 33 includes a telescopic side shell 331, a telescopic top shell 332, a front vehicle protection shell 333, and a rear vehicle protection shell 334.

[0096] Telescopic side shells 331 are arranged on both sides of the test vehicle, a telescopic top shell 332 is arranged on the top, and a front vehicle protection shell 333 and a rear vehicle protection shell 334 are respectively arranged at the front and rear sections of the test vehicle.

[0097] The telescopic side shell 331 is composed of two side sliding outer shells, one side fixed inner shell, and two limiters 323. A specific position is left inside the side sliding outer shell to realize the embedding of the side fixed inner shell. The side fixed inner shell is bolted to the first-layer load-bearing platform 321 of the vehicle body load-bearing structure 32. The side sliding outer shell is connected to the side fixed inner shell through the limiter 323 to form an integral body. The limiters 323 of the two can limit the sliding range of the side sliding outer shell relative to the fixed inner shell.

[0098] The telescopic top shell 332 is composed of two top sliding outer shells, one top fixed inner shell, and two limiters 323. A specific position is left inside the top sliding outer shell to realize the embedding of the top fixed inner shell. The top sliding outer shell is connected to the top fixed inner shell through the limiter 323 to form an integral body. The two limiters 323 can limit the sliding range between the top sliding outer shell and the top fixed inner shell. The top fixed inner shell and the side fixed inner shell are integrally processed.

[0099] The front vehicle protection shell 333 and the rear vehicle protection shell 334 are integrally processed with the top sliding outer shell and the side sliding outer shell. The front vehicle protection shell 333 and the rear vehicle protection shell 334 are bolted and combined to the platform of the vehicle body load-bearing structure 32.

[0100] The sensing and acquisition system 4 is composed of an acceleration sensor, a dynamic signal acquisition system, and a sensing line, and is used to test the acceleration vibration response of the vehicle body. The acceleration sensor is directly installed at the reserved platform positions of the axle housings of the transverse telescopic system and the longitudinal telescopic system. The dynamic signal acquisition system is directly installed and fixed on the first layer bearing platform 321 of the vehicle body load-bearing structure 32. The acceleration sensor is connected to the dynamic signal acquisition system through the sensing line, forming the entire sensing and acquisition system 4. The sensing and acquisition system 4 presents the data to the working computer through wireless transmission to facilitate data acquisition, processing, analysis and other work.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A biaxial test vehicle for the mobile detection of the dynamic characteristics of bridges, characterized in that, It includes a vehicle running system, a component telescopic system, a structural support system, and a sensing and acquisition system; The vehicle running system is arranged on the component telescopic system, the structural support system is arranged on the component telescopic system, and the sensing and acquisition system is arranged on the component support system; The vehicle running system is a two-axle vehicle running system; The component telescopic system includes two transverse telescopic systems and one longitudinal telescopic system; The two transverse telescopic systems are respectively arranged at both ends of the longitudinal telescopic system, and one walking tire is arranged at each end of each transverse telescopic system; The transverse telescopic system includes a rotating telescopic shaft and a transverse axle housing; The rotating telescopic shaft includes a rotating bridge and a telescopic round rod, and the telescopic round rod is embedded in the rotating bridge; The rotating telescopic shaft is connected to the transverse axle housing through a rolling bearing, and the telescopic round rod is connected to a half-axle connecting member; The longitudinal telescopic system includes a fixed telescopic shaft and a longitudinal axle housing; The fixed telescopic shaft includes a fixed bridge, a central solid round rod, and a telescopic round rod; The central solid round rod is embedded in the center of the fixed bridge, and a plurality of telescopic round rods are embedded in the fixed bridge, and the plurality of telescopic round rods are arranged around the central solid round rod; One fixed telescopic shaft is arranged at each end of the longitudinal axle housing, and the telescopic round rod is connected to the transverse axle housing through a T-shaped joint fitting; The component support system includes a chassis frame structure; The chassis frame structure includes a longitudinal axle bottom frame, a frame-type chassis, and a chassis receiving platform; The longitudinal axle bottom frame includes a longitudinal round half-axle hollow shell; The frame-type chassis is a frame-type structure composed of longitudinal reinforcing rods with rectangular cross-sections and rectangular transverse connecting rods; The chassis receiving platform is a flat plate structure; The longitudinal axle bottom frame is fixed to the lower side of the frame-type chassis, and the chassis receiving platform is fixed to the upper side of the frame-type chassis; The longitudinal round half-axle hollow shell is fixedly connected to the longitudinal axle housing; The component support system further includes a body load-bearing structure; The body load-bearing structure includes a bearing platform and a limiter; The bearing platform includes a first-layer bearing platform and a second-layer bearing platform; The first-layer bearing platform includes an upper panel and grid bars in a grid pattern arranged on the upper panel; The second-layer bearing platform includes a flat plate and a transverse axle bottom frame arranged at the end of the flat plate; Limiters are arranged at the four corners of the upper panel, the upper panel is connected to the chassis receiving platform through the limiters, the flat plate is arranged between the upper panel and the chassis receiving platform, and the transverse axle bottom frame is fixedly connected to the transverse axle housing.

2. The biaxial test vehicle for mobile detection of bridge dynamic characteristics according to claim 1, characterized in that, The vehicle running system includes four walking tires; The vehicle running system includes two axles, and each axle includes two walking tires arranged in parallel; The walking tire includes a tire, a wheel hub, a universal joint, a wheel hub bearing, and a half-axle connecting member; The tire is arranged on the wheel hub, a universal joint is installed on the wheel hub, the universal joint is connected to the wheel hub bearing through a spline, and the half-axle connecting member is assembled and combined with the wheel hub bearing.

3. The two-axis test vehicle for the mobile detection of the dynamic characteristics of a bridge according to claim 1, characterized in that, The telescopic round rod includes a solid rod and a sleeve, the solid rod is inserted into the sleeve, and the solid rod is connected to the half-axle connecting member.

4. The two-axle test vehicle for detecting the dynamic characteristics of a bridge according to claim 1, characterized in that The component support system further includes an outer shell support structure; The housing support structure includes a telescopic side shell, a telescopic top shell, a front vehicle protection shell, and a rear vehicle protection shell; Telescopic side shells are provided on both sides of the test vehicle, a telescopic top shell is provided on the top, and a front vehicle protection shell and a rear vehicle protection shell are respectively provided on the front and rear sections of the test vehicle.

5. The biaxial test vehicle for mobile detection of the dynamic characteristics of a bridge according to claim 1, characterized in that, The sensing and acquisition system includes an acceleration sensor, a dynamic signal acquisition system, and a sensing line; the acceleration sensor is installed at the reserved platform position of the axle housing of the transverse telescopic system and the longitudinal telescopic system, the dynamic signal acquisition system is fixedly installed on the first layer of the load-bearing platform of the vehicle body load-bearing structure, and the acceleration sensor is connected to the dynamic signal acquisition system through the sensing line to form the entire sensing and acquisition system.

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