阅读说明：本技术 一种弯沉加载车传压面面积及轴载的移动测量装置 (Mobile measuring device for pressure transmission surface area and axle load of deflection loading vehicle ) 是由 李中杰 王宏胜 周金浩 吴秀霞 孟达 蔡露露 于 2021-07-21 设计创作，主要内容包括：一种弯沉加载车传压面面积及轴载的移动测量装置,该装置包括：测试平台,用于承载弯沉加载车产生的轴载；压力传感器,位于测试平台内,压力传感器将弯沉加载车轴载信号传输至数据处理系统,数据处理系统输出可视化的弯沉加载车轴载；激光图像扫描器,位于测试平台内部,激光图像扫描器将弯沉加载车轮与测试平台接触形成的传压面当量圆图像信号传输至数据处理系统；数据处理系统,将激光图像扫描器采集到的图像信号转入后台降噪、增强黑白对比度,再进行传压面当量圆图形面积计算,最后输出可视化弯沉载重车传压面当量圆面积。通过采用本发明装置,可不受地磅类计重设施限制,简化了试验操作,提高了工作效率,其试验结果更加精确可靠。(A mobile measuring device for measuring the pressure transfer surface area and the axle load of a deflection loading vehicle comprises: the test platform is used for bearing the axle load generated by the deflection loading vehicle; the pressure sensor is positioned in the test platform and transmits the deflection loading vehicle axle load signal to the data processing system, and the data processing system outputs visual deflection loading vehicle axle load; the laser image scanner is positioned in the test platform and transmits a pressure transfer surface equivalent circle image signal formed by the contact of the deflection loading wheel and the test platform to the data processing system; and the data processing system converts the image signals acquired by the laser image scanner into a background to reduce noise and enhance black-white contrast, calculates the equivalent circle graphic area of the pressure transmitting surface, and finally outputs the equivalent circle area of the pressure transmitting surface of the visual deflection truck. By adopting the device, the limit of weighbridge weighing facilities can be avoided, the test operation is simplified, the working efficiency is improved, and the test result is more accurate and reliable.)

1. A mobile measuring device for the pressure transfer surface area and the axle load of a deflection loading vehicle is characterized by comprising:

the device comprises a test platform (1), a pressure sensor (2), a laser image scanner (3) and a data processing system (4);

the test platform (1) is used for bearing axle load generated by the deflection loading vehicle;

the pressure sensor (2) is positioned in the test platform (1), the pressure sensor (2) transmits the deflection loading vehicle axle load signal to the data processing system (4), and the data processing system (4) outputs visual deflection loading vehicle axle load;

the laser image scanner (3) is positioned inside the test platform (1), and transmits a pressure transfer surface equivalent circle image signal formed by the contact of the deflection loading wheel and the test platform (1) to the data processing system (4);

and the data processing system (4) is used for calculating and processing the image signals acquired by the laser image scanner (3) and finally outputting the equivalent circular area of the pressure transmission surface of the visual deflection truck.

2. The mobile measuring device for the pressure transmission surface area and the axle load of the deflection loading vehicle according to claim 1, wherein: the test platform (1) is of a rigid integral structure, and a transparent substrate (5) for scanning of the laser image scanner (3) is arranged at the top of the test platform.

3. The device for mobile measurement of the pressure transmission surface area and the axle load of the deflection loading vehicle according to claim 1 or 2, wherein: the test platform (1) is respectively positioned on the left wheel and the right wheel of the rear shaft of the deflection loading vehicle.

4. The mobile measuring device for the pressure transmission surface area and the axle load of the deflection loading vehicle according to claim 1, wherein: the pressure sensor (2) is a spoke type weighing and force measuring sensor, the axle load conducted through the test platform (1) is converted into an electric signal through the deformation of the pressure sensor (2), the electric signal is transmitted to the data processing system (4), and the axle load of the deflection loading vehicle is output visually through the calibrated deformation.

5. The mobile measuring device for the pressure transmission surface area and the axle load of the deflection loading vehicle according to claim 1, wherein: the laser image scanner (3) comprises an optical imaging part, a mechanical transmission part and a conversion circuit part, wherein the laser image scanner (3) converts an optical signal into an electric signal which can be accepted by a computer through a pressure transmission surface equivalent circular image characteristic formed by contacting a deflection loading vehicle tire with the test platform (1) through a rigid transparent substrate.

6. The mobile measuring device for the pressure transmission surface area and the axle load of the deflection loading vehicle according to claim 1, wherein: and the data processing system (4) converts the image signals acquired by the laser image scanner (3) into a background to reduce noise and enhance black-white contrast, calculates the equivalent circle area of the pressure transmitting surface, and finally outputs the equivalent circle area of the pressure transmitting surface of the visual deflection truck.

Technical Field

The invention relates to the technical field of roadbed and pavement detection, in particular to a mobile measuring device for the pressure transmitting surface area and axle load of a deflection loading vehicle.

Background

The method is characterized in that the method comprises the following steps of meeting the requirements in highway industry detection standards JTG 3450 and 2019T0951-2008, preparing … … for the method and the step 3.1, weighing the total mass of a rear shaft and the load of a single-side double wheel by using a weighbridge, and the like, and the axle weight is not changed during the driving and testing of the loading vehicle. And the area of the pressure transfer surface of the tire is tested if the tire of a new loading vehicle or the loading vehicle is started and has larger abrasion. The method for testing the area of the pressure transmission surface of the tire comprises the following steps: ensuring that the wheel loads on two sides of the loading vehicle and the tire air pressure of the loading vehicle meet the requirements of a table T0951, jacking the rear axle of the vehicle by using a jack on a flat and smooth hard road surface, laying a piece of new carbon paper and a piece of checkered paper below the tire, and slightly dropping the jack, namely printing tire marks on the checkered paper. The area within the single tire footprint range is measured by an integrator or a grid counting method, and the area of the area is in accordance with the equivalent circle area of the single wheel pressure transmission surface in the table T0951.

The above method implementation has two defects:

firstly, a place with a balance in the ground is needed for weighing the load, but the construction detection site is often in a remote area, and the place with the weighing function is not easy to find;

the pressure transmitting surface area acquisition and calculation procedures are complex, the detection efficiency is influenced, and if a tester misjudges the actual tire footprint area in the operation process, the applicability of judging the performance of the loading vehicle is directly influenced. Therefore, the requirement of JTG 3450 and 2019 on the site test of road bed and pavement cannot be realized efficiently and accurately.

Disclosure of Invention

In order to solve the technical problems, the invention provides a mobile measuring device for the pressure transmitting surface area and the axle load of a deflection loading vehicle, which avoids the influence on a test result possibly caused by calculating the equivalent circular area of the pressure transmitting surface by adopting a digital lattice method, simplifies the test operation and improves the working efficiency; compared with the traditional wagon balance actual measurement and the traditional wagon balance area calculation, the device disclosed by the invention is used for measuring the equivalent circle area and the axle load of the pressure transmission surface of the deflection loading vehicle, the working efficiency is greatly improved, and the test result is more accurate and reliable.

The technical scheme adopted by the invention is as follows:

a mobile measuring device for measuring the pressure transfer surface area and the axle load of a deflection loading vehicle comprises:

the device comprises a test platform, a pressure sensor, a laser image scanner and a data processing system;

the test platform is used for bearing the axle load generated by the deflection loading vehicle;

the pressure sensor is positioned in the test platform and transmits the deflection loading vehicle axle load signal to the data processing system, and the data processing system outputs visual deflection loading vehicle axle load;

the laser image scanner is positioned in the test platform and transmits a pressure transfer surface equivalent circle image signal formed by the contact of the deflection loading wheel and the test platform to the data processing system;

and the data processing system converts the image signals acquired by the laser image scanner into a background to reduce noise and enhance black-white contrast, calculates the equivalent circle graphic area of the pressure transmitting surface, and finally outputs the equivalent circle area of the pressure transmitting surface of the visual deflection truck.

The test platform is of a rigid integral structure, and a transparent substrate for scanning of the laser image scanner is arranged at the top of the test platform.

And the test platforms are respectively positioned on the left wheel and the right wheel of the rear shaft of the deflection loading vehicle.

The pressure sensor is a spoke type weighing force-measuring sensor, the axle load conducted through the test platform is converted into an electric signal through the deformation of the pressure sensor, the electric signal is transmitted to the data processing system, and the axle load of the deflection loading vehicle is output visually through the comparison of the deformation calibrated.

The laser image scanner comprises an optical imaging part, a mechanical transmission part and a conversion circuit part, wherein the laser image scanner converts an optical signal into an electric signal which can be accepted by a computer through a pressure transmission surface equivalent circular image characteristic formed by the contact of a deflection loading vehicle tire and a test platform through a rigid transparent substrate.

The data processing system converts the image signals collected by the laser image scanner into a background to reduce noise and enhance black-white contrast, calculates the equivalent circle graphic area of the pressure transmitting surface, and finally outputs the equivalent circle area of the pressure transmitting surface of the visual deflection truck.

The invention discloses a mobile measuring device for the pressure transfer surface area and the axle load of a deflection loading vehicle, which has the following technical effects:

1) the device disclosed by the invention can display the equivalent circle area and the axle load of the pressure transmission surface of the deflection loading vehicle in real time, so that the test steps are optimized. By adopting the device, the device can be used for measuring in a hardening site without being limited by weighbridge weighing facilities, and meanwhile, the influence on a test result possibly caused by calculating the equivalent circle area of the pressure transmission surface by adopting a grid method is avoided; the test operation is simplified, and the working efficiency is improved. Compare in traditional weighbridge actual measurement, count the check and ask the area to say, adopt this novel device that provides to carry out the deflection and load the car and pass the pressure surface equivalent circle area and the axle load measurement, work efficiency obtains greatly improving, and its test result is accurate more reliable.

2) The device is not limited by places, and has high portability and wide application range; the device can more accurately acquire the equivalent circle area of the single-wheel pressure transmission surface, and overcomes the problem that the equivalent circle area is difficult to accurately judge due to misjudgment of testers in the original manual grid counting mode. The equivalent circle area of the deflection loading vehicle axle load and the pressure transmission surface is automatically measured in real time, and the complicated procedures of measurement and reading and the deviation with the actual measured value are avoided.

3) The pressure sensor and the laser image scanner display the equivalent circle area and the axle load of the pressure transmitting surface in real time through the data processing system, so that the pressure sensor and the laser image scanner can assist test personnel to visually know and adjust according to deviation, and the influence of human factors on test parameters is avoided. Compare in the sense of sight estimation method, adopt this novel device that provides to carry out the test of pressure transmission surface equivalent circle area and axle load, its test result is more accurate.

Drawings

FIG. 1 is a schematic structural diagram of a mobile measuring device according to the present invention.

Wherein: 1-test platform 1, 2-pressure sensor 2, 3-laser image scanner, 4-data processing system, 5-transparent substrate.

Detailed Description

As shown in fig. 1, the device for measuring the area of a pressure transmission surface and the axle load of a deflection loading vehicle comprises a test platform 1, a pressure sensor 2, a laser image scanner 3 and a data processing system 4.

The testing platform 1 is of a rigid integral structure, the transparent substrate 5 for scanning is reserved at the top of the testing platform and serves as a bearing platform for testing and main configuration parts of the deflection loading vehicle, the testing platform 1 is firm, stable, high in rigidity and transparent, the deflection loading vehicle can stably stay on the testing platform 1, and the fact that the laser image scanner 3 can collect images through the transparent substrate 5 during laser scanning is guaranteed.

The test platform 1 is respectively positioned on the left wheel and the right wheel of the rear axle of the deflection loading vehicle, one set of data processing system 4 is connected with the two test platforms 1 and respectively positioned on the two sides of the wheels, and the test platforms 1 can bear axle load generated by the deflection loading vehicle and assemble other components.

The pressure sensor 2 is positioned in the testing platform 1, the pressure sensor 2 adopts a spoke type weighing force-measuring sensor, a rigid transparent substrate is used as a testing bearing platform, and the rigid transparent substrate has rigid bearing performance to prevent equipment from being crushed and deformation.

The deflection loading vehicle axle load is converted into an electric signal through the pressure sensor 2 and transmitted to the data processing system 4, and the visual deflection loading vehicle axle load is output through the calibrated deformation in comparison for measuring the single-side axle load of the deflection loading vehicle.

The pressure sensor 2 may be an HDW202 spoke-type weighing (load cell) sensor.

The laser image scanner 3 is positioned in the test platform 1, is of a laser type image scanning system, mainly comprises an optical imaging part, a mechanical transmission part and a conversion circuit part, the optical imaging part, the mechanical transmission part and the conversion circuit part are mutually matched, the pressure transfer surface equivalent circle image characteristics formed by the contact of a deflection loading vehicle tire and the test platform 1 are transmitted through a rigid transparent substrate, and optical signals are converted into electric signals acceptable by a computer.

Equivalent circle of pressure transmission surface: the tire of the truck is grounded to form a shadow area similar to an ellipse, and the area is calculated for simplifying calculation in the specification to be similar to a circle. Protocol T0951 as indicated by the requirements of the parameters of table 1:

TABLE 1 parameter requirements for loading carts

Rear axle standard axle load P (kN)	100±1
		Single side double wheel load (kN)	50±0.5
Tire pressure (MPa)	0.7±0.05
		Equivalent circle area (mm) of single-wheel pressure transmission surface2)	(3.56±020)×104

In table 1, requirements are made on main parameters of a loading vehicle, such as standard axle load of a rear axle, load of a single-side double wheel, tire pressure, equivalent circle area of a single-wheel pressure transmission surface, and the like, the equivalent circle radius of the single-wheel pressure transmission surface is specified in the original specification TO951, and the equivalent circle area of the single-wheel pressure transmission surface is actually tested in preparation work.

The data processing system 4 converts the image signals collected by the laser image scanner 3 into background noise reduction and black-white contrast enhancement, then performs graphic calculation of equivalent circular area of the pressure transmission surface, and finally outputs the equivalent circular area of the pressure transmission surface of the visual deflection truck and axle load data.

The data processing system 4 is provided with the equivalent circle area of the deflection loading vehicle pressure transmission surface and the axle load signal which are processed and collected, and is provided with: recording engineering projects and basic information of a deflection loading vehicle, and storing collected data; secondly, visualizing an operation interface; and thirdly, outputting a test result in real time, and automatically judging whether the deflection loading vehicle meets the technical requirements.

The data processing system 4 adopts ImageJ (official network: https:// image j. NIH. gov/ij /), which is a public image processing software based on java, is a powerful free software developed by National Institutes of Health (NIH), and plays a very important role in biological and medical image analysis. The image processing software can also display, edit, analyze, process, store and print 8-bit, 16-bit and 32-bit pictures and support various formats such as TIFF, PNG, GIF, JPEG, BMP, DICOM, FITS and the like. ImageJ may also run on a variety of platforms such as Microsoft Windows, Mac OS X, Linux, and Sharp Zaurus PDA.

The test platform 1 is a rigid member, can bear the mass of the deflection loading vehicle and does not deform, and the transparent substrate meets the requirements of bearing and scanning. The data acquisition precision of the pressure sensor 2 is 0.1kN, and the repeatability error is not more than 1%. The resolution of the laser image scanner 3 is not less than 300 dpi. The data processing system 4 adopts a PC notebook, the basic programming program adopts Java, C + + or other languages, the system is stable, and the operation and the control are simple.

The pressure sensor 2 and the laser image scanner 3 are assembled based on the test platform 1, and have the functions of real-time indicating equivalent circle area of the pressure transmission surface of the deflection loading vehicle and axle load, the indicating value is stable and reliable, and the axle load precision is 0.1 kN. The equivalent circle area precision of the pressure transmission surface is 25mm²。

The specific operation method of the device of the invention is as follows:

1) searching a rigid ground with a stable field, and adjusting and keeping the instrument device flat and stable;

2) after the instrument device is preheated, the loading vehicle is stopped and stabilized on the test platform 1;

3) and recording the equivalent circle area and the axle load of the pressure transmission surface of the deflection loading vehicle in real time to finish the rest test steps.