CN111021210A

CN111021210A - Road flatness detection device

Info

Publication number: CN111021210A
Application number: CN201911357520.7A
Authority: CN
Inventors: 王立迎
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-04-17

Abstract

The invention discloses a road flatness detection device, which is arranged on a plurality of test vehicles and comprises a shell and a main control board arranged in the shell, wherein the main control board is electrically connected with: an acceleration sensor configured to detect a vibration amplitude variation value generated by a road surface undulation; the system comprises a plurality of laser sensors which are transversely arranged, wherein the laser sensors are configured to emit test laser and receive reflected light reflected by a road surface to obtain image information formed by a plurality of reflected light; the image processing module is configured to obtain the gap height between the image processing module and a reference plane according to the image information; a data acquisition and processing module; a processor configured to obtain flatness information of a road surface from the vibration amplitude variation value subjected to analog-to-digital conversion and the position information of the test vehicle; and a communication module.

Description

Road flatness detection device

Technical Field

The invention relates to a measuring device, in particular to a road flatness detection device.

Background

The Road Surface flatness (Road Surface Roughness) refers to a deviation of a concave-convex amount in a longitudinal direction of a Road Surface. The pavement evenness is an important index in pavement evaluation and pavement construction acceptance, and mainly reflects the evenness of a pavement longitudinal section profile curve. When the profile curve of the longitudinal section of the road surface is relatively smooth, the road surface is relatively flat or the flatness is relatively good, otherwise, the flatness is relatively poor. Good pavement requires good pavement flatness. At present, three methods for measuring the flatness of a road surface generally exist: 1) a fixed-length ruler method, namely adopting a straight ruler with specified length to be placed on the surface of the road surface, and directly measuring the gap between the straight ruler and the road surface as a flatness index; 2) a cross section drawing method, namely adopting a multi-wheel trolley type flatness meter to push along a road to directly draw the surface relief condition of the road surface and represent the flatness of the road surface; 3) the method is characterized in that a smooth-blowing accumulation method, namely a smooth-blowing accumulation instrument is arranged on a standard measuring vehicle, and the accumulated vibration of a carriage when the vehicle runs along a road is recorded to represent the road surface flatness. Irregularities in the road surface affect the speed and safety of the vehicle, the smoothness of the driving, and the comfort of the passengers, and also aggravate the damage of the road surface and the wear of the parts of the vehicle. The current standard of China specifies that the road flatness can be measured by a 3m ruler, a continuous flatness meter or a vehicle-mounted bump accumulation instrument, and the road flatness is measured by the vehicle-mounted bump accumulation instrument in a common way. The pitch accumulation instrument mainly relies on an acceleration sensor to record accumulated vibration, and then represents the road flatness. However, the inventor finds that the detection speed of the detection mode is slow, the traffic interference is large, and the detection mode is not suitable for regular data acquisition of a large-range road surface. If a commercial team is used for large-scale pavement data acquisition, the cost is greatly increased. Accordingly, there is a need for improvement in the above-mentioned problems of the prior art.

Disclosure of Invention

In view of the above problems in the prior art, an object of the present invention is to provide a road flatness detecting apparatus which is low in cost and suitable for large-scale road flatness detection.

In order to achieve the above object, a road flatness detecting apparatus provided in an embodiment of the present invention is disposed on a plurality of test vehicles, and includes a casing and a main control board disposed in the casing, wherein the main control board is electrically connected to:

an acceleration sensor configured to detect a vibration amplitude variation value generated by a road surface undulation;

the system comprises a plurality of laser sensors which are transversely arranged, wherein the laser sensors are configured to emit test laser and receive reflected light reflected by a road surface to obtain image information formed by a plurality of reflected light;

the image processing module is configured to obtain the gap height between the image processing module and a reference surface according to the image information and obtain the transverse flatness information of the current position according to the comparison result of the gap height and a preset value;

a GPS module configured to acquire location information of a test vehicle;

the data acquisition and processing module is configured to receive the vibration amplitude variation value and the position information of the test vehicle and perform analog-digital conversion;

a processor configured to acquire longitudinal flatness information of a road surface at a current position according to the vibration amplitude variation value subjected to analog-to-digital conversion and the position information of the test vehicle, and acquire flatness information of the road surface according to the transverse flatness information and the longitudinal flatness information;

the communication module is configured to send the road flatness information to a data acquisition terminal, and the data acquisition terminal is configured to be in real-time communication connection with the road flatness monitoring devices and acquire the road flatness information of different road sections.

Preferably, a mounting plate is arranged in the shell, a mounting groove is formed in the mounting plate, and the GPS module is arranged in the mounting groove.

Preferably, the acceleration sensor is a MEMS acceleration sensor.

Compared with the prior art, the road flatness monitoring device provided by the embodiment of the invention is connected with the plurality of detection devices through the data acquisition terminal, and can simultaneously realize real-time flatness test on a plurality of road sections by means of the GPS positioning module.

Drawings

Fig. 1 is a schematic block diagram of a road flatness detecting apparatus according to the present invention.

Fig. 2 is a schematic structural diagram of the road flatness detecting apparatus of the present invention.

The main reference numbers:

the method comprises the following steps of 1-road flatness detection device, 2-main control board, 21-data acquisition and processing module, 3-acceleration sensor, 31-mounting board, 311-mounting groove, 4-GPS module and 5-data acquisition terminal; 6-laser sensor; 7-image processing module.

Detailed Description

Specific embodiments of the present application will be described in detail below with reference to the accompanying drawings, but the present application is not limited thereto.

It will be understood that various modifications may be made to the embodiments disclosed herein. Accordingly, the foregoing description should not be construed as limiting, but merely as exemplifications of embodiments. Other modifications will occur to those skilled in the art within the scope and spirit of the disclosure.

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the disclosure and, together with a general description of the disclosure given above, and the detailed description of the embodiments given below, serve to explain the principles of the disclosure.

These and other characteristics of the present application will become apparent from the following description of preferred forms of embodiment, given as non-limiting examples, with reference to the attached drawings.

It should also be understood that, although the present application has been described with reference to some specific examples, a person of skill in the art shall certainly be able to achieve many other equivalent forms of application, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.

The above and other aspects, features and advantages of the present disclosure will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

Specific embodiments of the present disclosure are described hereinafter with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are merely examples of the disclosure that may be embodied in various forms. Well-known and/or repeated functions and structures have not been described in detail so as not to obscure the present disclosure with unnecessary or unnecessary detail. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present disclosure in virtually any appropriately detailed structure.

The specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may each refer to one or more of the same or different embodiments in accordance with the disclosure.

As shown in fig. 1 and fig. 2, a road flatness detecting apparatus 1 provided in an embodiment of the present invention is disposed on a plurality of test vehicles (not shown in the drawings), and includes a casing (not labeled in the drawings) and a main control board 2 disposed in the casing, wherein the main control board 2 is electrically connected to:

an acceleration sensor 3, the acceleration sensor 3 being configured to detect a vibration amplitude variation value generated by a road surface undulation;

the device comprises a plurality of laser sensors 6 which are transversely arranged, wherein the laser sensors 6 are configured to emit test laser and receive reflected light reflected by a road surface to obtain image information formed by a plurality of reflected light;

the image processing module 7 is configured to obtain a gap height between the image processing module 7 and a reference surface according to the image information, and obtain transverse flatness information of the current position according to a comparison result of the gap height and a preset value;

a GPS module 4, wherein the GPS module 4 is configured to acquire the position information of the test vehicle;

the data acquisition and processing module 21 is configured to receive the vibration amplitude variation value and the position information of the test vehicle and perform analog-digital conversion;

a processor 11, wherein the processor 11 is configured to obtain longitudinal flatness information of a road surface at a current position according to the vibration amplitude variation value subjected to analog-digital conversion and the position information of the test vehicle, and obtain flatness information of the road surface according to the transverse flatness information and the longitudinal flatness information;

the communication module 14 is configured to send the road flatness information to a data acquisition terminal 5, and the data acquisition terminal 5 is configured to be in communication connection with the plurality of road flatness monitoring devices 1 in real time and acquire the road flatness information of different road sections.

In this embodiment, the main control board 2 includes a data collecting and processing module 21, and the data collecting and processing module includes an analog-digital conversion circuit and a data bus, and can collect and convert analog signals into digital signals; and data acquisition terminal 5 can be a computer mainframe in the in-service use, this computer accessible wireless network and road roughness detection device 1 communication connection, and communication module is optional for WIFI module, 2G, 3G, 4G or 5G module this moment, when being connected to main control board 2, the data that data acquisition and processing module 21 on main control board 2 obtained can be sent to data acquisition terminal 5 through wireless network after handling through the treater, and data acquisition terminal 5 can be simultaneously with a plurality of road roughness detection device 1 communication connection of operation in different highway sections, with the help of the positional information that the GPS module provided, can realize road roughness on a large scale.

In addition, the acceleration sensor 3 included in the present invention can be accommodated in the mounting plate 31 and electrically connected to the main control board 2 for detecting the variation of the vibration amplitude caused by the undulation of the road surface. In the present embodiment, based on the cost consideration, it is preferable to select a MEMS (micro electro Mechanical Systems) acceleration sensor for only one direction (Z-axis direction) as the acceleration sensor 3, but the present application is not limited to this application, and a two-axis or three-axis speed sensor can be used as an alternative to the acceleration sensor of the present invention, and conversely, acceleration data with different dimensions can obtain driving information in multiple directions, for example: the turning behavior of the vehicle can be judged by using the X-axis acceleration in the horizontal direction, or the braking and accelerating behaviors can be judged by using the Y-axis acceleration in the advancing direction. However, since the state of the road pavement is reflected only on the vertical vibration amount in the direction perpendicular to the ground, the flatness of the road pavement can be actually determined by using the Z-axis acceleration in the direction perpendicular to the road surface.

Furthermore, the mounting groove 311 disposed on the mounting plate 31 can engage the GPS module 4 with the mounting plate 31, so that the acceleration sensor 3 and the GPS module 4 can be integrated into a single detection assembly, thereby improving the overall portability and convenience. In this embodiment, the GPS module 4 is electrically connected to the main control board 2, and the GPS module has a main function of providing positioning coordinate data of the test vehicle.

In the aspect of detection process, the acceleration sensor 3 of the invention collects acceleration information in the Z-axis direction, and matches with the GPS module 4 arranged on the acceleration sensor to perform position location, so that the time axes of the acceleration sensor and the GPS module correspond to each other, the acceleration value of the vehicle passing through a specific place can be obtained, and the GPS module is used for estimating the vehicle speed. After the position information and the acceleration information are respectively transmitted to the main control board 2, the position information and the acceleration information are graphically displayed through a user interface (such as a LabVIEW interface) after analog-digital conversion, and are transmitted to the data acquisition terminal 5, and the information can be used for a detector to master the road surface condition in real time during detection. Finally, after the data information is transmitted to the data acquisition terminal 5, in this embodiment, a post-processing program (Matlab program) performs influence factor correction and data screening on the received data information, establishes an acceleration root mean square index based on an acceleration root mean square value, and compares the acceleration root mean square index with a preset value, thereby determining the road flatness.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.

Claims

1. Road roughness detection device, it sets up on a plurality of test vehicles, is in including casing and setting main control board in the casing, wherein electric connection has on the main control board:

a GPS module configured to acquire location information of a test vehicle;

2. The road flatness detecting device of claim 1, wherein a mounting plate is disposed within the housing, a mounting slot is disposed on the mounting plate, and the GPS module is disposed within the mounting slot.

3. The road flatness detection apparatus of claim 1, wherein the acceleration sensor is a single-axis acceleration sensor.