CN212641139U

CN212641139U - Portable rapid survey road flatness device

Info

Publication number: CN212641139U
Application number: CN202020723081.9U
Authority: CN
Inventors: 周立; 李中杰; 张随; 徐俊
Original assignee: Gezhouba Group Testing and Inspection Co Ltd
Current assignee: Gezhouba Group Testing and Inspection Co Ltd
Priority date: 2020-05-06
Filing date: 2020-05-06
Publication date: 2021-03-02
Anticipated expiration: 2030-05-06

Abstract

A portable device for rapidly measuring the pavement evenness comprises a shell, wherein the length of the shell is more than three meters; the bottom end of the shell is opened, supporting plates are arranged on the left and right sides of the bottom end of the shell, a partition plate is arranged in the shell and divides the space in the shell into an upper section and a lower section, a control system is arranged in the upper section, a ball screw mechanism is arranged in the lower section and is driven by a driving motor, a laser range finder is arranged on a ball slide block of the ball screw mechanism, and a pressure sensor is embedded in the bottom of the corresponding supporting plate; the driving motor, the laser range finder and the pressure sensor are electrically connected with the control system. The utility model provides a pair of portable spot test road flatness device, but spot test road flatness.

Description

Portable rapid survey road flatness device

Technical Field

The utility model relates to a road bed road surface detection area, especially a portable spot test road surface roughness device.

Background

The road surface flatness is measured by using a three-meter ruler defined in the detection standard JTG E60-2008 of the highway industry, and the maximum gap between the reference surface of the three-meter ruler and the road surface represents the road surface flatness in mm. The method is suitable for measuring the flatness of each layer of compacted and molded pavement surface to evaluate the construction quality of the pavement, and can also be used for detecting the construction flatness after the roadbed surface is molded.

In the process of measuring the flatness of the road surface by the three-meter ruler, the condition of the gap between the bottom surface of the three-meter ruler and the road surface is measured by eyes, and the position of the maximum gap is determined. In actual operation, a feeler gauge with a height marking line is inserted into the gap through sensory estimation, and the gap height is repeatedly compared; or measuring the depth of the top surface of the straight ruler from the ground at the position of the estimated maximum gap by using a depth ruler, wherein the maximum gap height of the test point is obtained by subtracting the height of the ruler from the depth, and if a plurality of suspected maximum gaps exist, the measurement is carried out for a plurality of times.

The method is complex to implement, detection efficiency is affected, and accuracy of a detection result is directly affected if a tester misjudges the maximum gap between the three-meter straight ruler and the road surface in the operation process.

Disclosure of Invention

The utility model aims to solve the technical problem that a portable spot test road flatness device is provided, three meters rulers of measurement and the biggest clearance distance of way table that can be more accurate have been overcome and have been adopted under the original detection mode, lead to measuring the condition that three meters rulers and the biggest clearance of way table are difficult to accurate location because of the trial personnel misjudge to influence the problem of experimental accuracy.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

a portable device for rapidly measuring the pavement evenness comprises a shell, wherein the length of the shell is more than three meters; the bottom end of the shell is opened, supporting plates are arranged on the left and right sides of the bottom end of the shell, a partition plate is arranged in the shell and divides the space in the shell into an upper section and a lower section, a control system is arranged in the upper section, a ball screw mechanism is arranged in the lower section and is driven by a driving motor, a laser range finder is arranged on a ball slide block of the ball screw mechanism, and a pressure sensor is embedded in the bottom of the corresponding supporting plate; the driving motor, the laser range finder and the pressure sensor are electrically connected with the control system.

The control system comprises a power supply module, a single chip microcomputer, a display module, a deviation value presetting module and a memory; the display module is arranged outside the shell, and the power supply module, the single chip microcomputer, the deviation value presetting module and the memory are arranged inside the upper interval.

The ball screw mechanism comprises a screw rod, the screw rod is in threaded connection with a ball sliding block, the lower ends of the two sides of the ball sliding block are in sliding fit with a guide rod, and the guide rod is fixed on the shell.

The ball sliding block is provided with a slot, the left and right sides of the lower end of the slot are provided with a supporting plate, and the front and the back of the supporting plate are provided with limiting bolts.

The utility model relates to a portable spot test road flatness device has following technological effect:

1) the laser range finder is used for moving to measure and display the vertical distance in real time, so that the testing personnel can be assisted to visually know the detection result, and the influence of human factors on the test parameters is avoided.

2) For manual operation, the test steps are simplified, and the working efficiency is improved.

3) And when abnormal data is caused by some foreign matters protruding from the road surface or concave pits, the abnormal data can be displayed on the display and compared with the maximum deviation value, so that detection misjudgment is avoided.

4) The whole volume is small, and the portable bicycle is convenient to carry.

Drawings

The invention will be further explained with reference to the following figures and examples:

fig. 1 is a schematic diagram of the external structure of the present invention.

Fig. 2 is a main sectional view of the present invention.

Fig. 3 is a schematic structural diagram of the middle ball screw mechanism of the present invention.

Fig. 4 is a schematic structural diagram of the middle ball screw mechanism of the present invention.

Fig. 5 is a schematic view of a partial structure of the middle ball block of the present invention.

Fig. 6 is a schematic diagram of the inside of the middle housing (power module and processor module are not shown).

Fig. 7 is a block diagram of the electric control system of the present invention.

Fig. 8 is a left side view of the middle housing of the present invention.

Detailed Description

As shown in fig. 1-8, a portable device for rapidly determining the pavement evenness comprises a housing 1, wherein the housing 1 is in a cuboid structure and is made of light aluminum alloy. The length of the shell 1 is more than three meters, so that the measurement of three meters in length is guaranteed according to the detection standard of the highway industry.

The supporting plate 2 is arranged on the left and right sides of the bottom end opening and the bottom end of the shell 1, an interval is kept between the supporting plates 2, and the laser of the laser range finder 9 can fall conveniently. One side of the shell 1 is hinged with a door 18, and the door 18 is fixed with the side wall of the shell 1 through the magnet in an adsorption way. Therefore, one side of the shell 1 is opened, and the installation and the replacement of parts are convenient.

The space in the shell 1 is divided into an upper section 4 and a lower section 5 by the partition board 3, wherein a control system is arranged in the upper section 3, and the control system is used for controlling the action of a driving motor 7, receiving data transmitted by the laser range finder 9, clearing some abnormal data and displaying the data.

And a ball screw mechanism 6 is arranged in the lower interval 5, the ball screw mechanism 6 comprises a screw rod 11, two ends of the screw rod 11 are arranged on a vertical plate of the shell 1 through bearings, and one end of the screw rod 11 extends out of the vertical plate and is connected with a driving motor 7. The screw rod 11 is connected with a ball sliding block 8 through threads, the lower ends of two sides of the ball sliding block 8 are in sliding fit with a guide rod 12, and the guide rod 12 is fixed on the shell 1. When the driving motor 7 drives the screw rod 11 to rotate, the ball sliding block 8 moves left and right along the length direction of the shell 1.

The ball slider 8 is provided with a slot 14, and the lower end of the slot 14 is provided with a support plate 15 on the left and right. The slot 14 is of a width matching the laser range finder 9 and the laser range finder 9 can be slid into the slot 14 and supported by the pallet 15. For fixing the laser distance measuring device 9, a stop bolt 16 is provided in front of and behind the support plate 15. After screwing in the limit bolt 16, the laser range finder 9 is limited in the front and back and cannot be moved, and when the laser range finder 9 needs to be taken down, the limit bolt 16 can be rotated to lower limit, and the laser range finder 9 can slide out.

A plurality of universal wheels 17 are arranged on one side of the shell 1. Thus, the device can be placed vertically during transfer and then moved by the universal wheels 17.

In addition, a pressure sensor 10 is embedded at the bottom of the corresponding support plate 2, and the pressure sensor 10 is used for detecting whether the device is placed in place.

The control system comprises a power supply module, a single chip microcomputer, a display module 13, an offset value presetting module and a memory; the display module 13 is arranged outside the shell 1, and the power supply module, the single chip microcomputer, the deviation value presetting module and the memory are arranged inside the upper section 4. The circuit connection block diagram is shown in fig. 7.

Wherein the power module provides power for the singlechip, the driving motor 7 and the like.

The specific model of the singlechip is a C8051F980 singlechip.

A display module 13 is provided on the upper surface of the housing 1 for displaying the measured values. And a starting button is arranged on one side and used for controlling the power supply to be communicated.

The deviation value presetting module is used for setting a maximum deviation value. Because of the protruding foreign matter of way table or recessed pothole, gap etc. can lead to the measuring process, and some values are inaccurate, consequently through preset value, convenient direct contrast in later stage is rejected.

The working principle and the process are as follows: the device is placed on the road surface to be tested, a power switch button is started, a pressure sensor 10 receives pressure and transmits a signal to a single chip microcomputer, the single chip microcomputer controls a driving motor 7 to be started, and a ball sliding block 8 drives a laser range finder 9 to move from one end of the device to the other end of the device. In the process, the laser range finder 9 emits laser beams for 1 time to measure the vertical distance every time the laser range finder moves horizontally by 0.003m, and transmits data information to the singlechip in real time, and the singlechip carries out arrangement respectively. The single chip microcomputer compares the acquired data with the maximum deviation value and judges whether the data is valid or not; and the set maximum deviation value and the comparison result are visually displayed by the display module.

Claims

1. The utility model provides a portable spot test road flatness device which characterized in that: comprises a shell (1), wherein the length of the shell (1) is more than three meters; the laser distance measuring device is characterized in that the bottom end of a shell (1) is opened, supporting plates (2) are arranged on the left and right sides of the bottom end of the shell, a partition plate (3) is arranged in the shell (1), the space in the shell (1) is divided into an upper section (4) and a lower section (5) by the partition plate (3), a control system is arranged in the upper section (4), a ball screw mechanism (6) is arranged in the lower section (5), the ball screw mechanism (6) is driven by a driving motor (7), a laser distance measuring instrument (9) is arranged on a ball slide block (8) of the ball screw mechanism (6), and a pressure sensor (10) is embedded; the driving motor (7), the laser range finder (9) and the pressure sensor (10) are electrically connected with the control system.

2. A portable rapid determination of road flatness device according to claim 1, in which: the control system comprises a power supply module, a single chip microcomputer, a display module (13), an offset value presetting module and a memory; the display module (13) is arranged outside the shell (1), and the power supply module, the single chip microcomputer, the deviation value presetting module and the memory are arranged inside the upper section (4).

3. A portable rapid determination of road flatness device according to claim 1, in which: the ball screw mechanism (6) comprises a screw rod (11), the screw rod (11) is in threaded connection with a ball sliding block (8), the lower ends of the two sides of the ball sliding block (8) are in sliding fit with a guide rod (12), and the guide rod (12) is fixed on the shell (1).

4. A portable rapid determination of road flatness device according to claim 1, in which: the ball sliding block (8) is provided with a slot (14), the left and right sides of the lower end of the slot (14) are provided with supporting plates (15), and the front and back of the supporting plates (15) are provided with limiting bolts (16).