CN201289413Y

CN201289413Y - Real time measurement device for barokinesis distribution of tyre to ground

Info

Publication number: CN201289413Y
Application number: CNU2008201532689U
Authority: CN
Inventors: 张宏超; 杜群乐; 毕玉峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-09-19
Filing date: 2008-09-19
Publication date: 2009-08-12
Anticipated expiration: 2018-09-19

Abstract

The utility model discloses a real-time monitoring device for the dynamic distribution of the pressure of a tire to the ground. The device comprises a test bench, a data scanner, a data buffer and a computer. A pressure sensor is arranged in the test bench and is connected with the data scanner through a data line; the data buffer is arranged in the data scanner and communicated with the computer through a data line; the test bench is a steel base; an asphalt concrete layer is arranged on the test bench; and the pressure sensor is buried in the concrete layer. The utility model not only can automatically measure, record, transmit and process the pressure of the tire to the ground, but also can carry out dynamic measurement in the high-speed traveling state on site, thereby finally achieving the highly-accurate automatic measurement on site, improving the measuring efficiency and enhancing the measuring capability.

Description

Tire ground pressure DYNAMIC DISTRIBUTION real-time measurement apparatus

Technical field

The utility model is applicable in road traffic engineering, the airport engineering measurement and the analysis to wheel loads such as vehicle, aircrafts, be specifically related to a kind of tire ground pressure DYNAMIC DISTRIBUTION real-time measurement apparatus, measurement result can be used for the modelling that the wheel load ground pressure distributes, vehicle or aircraft axle carry the research of spectrum and wheel load spectrum, pavement structure is to the response force analytical calculation of load, and fields such as a road surface and a road Structural Strength Design.

Background technology

In road surface and road in airport design, load ground pressure distribution form is reduced to circle, equally distributed dead load.The vehicular load ground pressure distributes very complicated, shows as following several respects but in fact:

1. to act on the ground connection shape on road surface be not circular to tire, and show as rectangle to a greater extent, and along with the increase of carload, rectangular shape is more and more obvious;

2. the distribution of ground pressure is not equally distributed, but along with the difference of the increase and decrease of vehicle load and pressure of tire and change a lot;

3. the tyre surface of tire has decorative pattern to exist, and the form of decorative pattern is various, and this complicated diversity of decorative pattern has determined the non-uniform property and the complicacy of ground pressure;

4. vehicle or aircraft be under transport condition, all can cause duration of contact its ground pressure to distribute between stiffness variation during tyre rotation and the road surface momently producing greatly changing, and with pressure distribution under the static condition a great difference arranged;

Therefore, in order to improve the accuracy of in the Pavement Design load being described,, must distribute to the vehicle tyre ground pressure and carry out accurately, dynamically measure in real time to guarantee the reliability of design result.

The measurement that this tire ground pressure is distributed is at present all being carried out under the static condition or on experiment indoor high-speed wheel hub, and method of testing mainly contains: pressure plare method, pressure transducer method, pressure-sensitive embrane method and optical absorption method etc.These measuring methods can both better be measured the size of tire road pavement acting force faster and distribute, but with regard to tyre contact pressure measurement aspect, they also have the some shortcomings part, mainly show:

1. measure and under static condition, carry out, do not conform to the actual travel condition; Some measuring method can allow tire with a little speed by test board, but this speed differs greatly with the actual travel speed of vehicle generally less than 1 kilometer/hour, can not simulate actual dynamic effect; And the high-speed test (HST) of carrying out on the high speed wheel hub in the laboratory, because to be subjected to laboratory restriction condition, the vehicle that can measure be very limited, and different size need be equipped with the wheel hub of different size from tire, involves great expense, and seldom carries out such test;

2. because the pressure transducer dot matrix distributes, and have the gap between the sensor, what make tire actually contacts to earth that area reduces, pressure increases, thereby can make the deviation of measurement result;

3. these measurements are all carried out on the steel plummer, because there are very big stiffness differences in steel and road surface material, therefore are difficult to simulate the compatible deformation on the actual road surface, the deviation of the measurement result that causes;

Summary of the invention

Technical problem to be solved in the utility model provides and a kind ofly not only can measure automatically, record, transmission process automatically automatically, but also can carry out kinetic measurement under the high-speed travel state at the scene, the final on-the-spot automatic measurement of high precision of realizing, improved efficiency of measurement, extended the tire ground pressure DYNAMIC DISTRIBUTION real-time measurement apparatus of the ability of measuring, to overcome the above-mentioned defective that prior art exists.

The technical scheme of the utility model technical solution problem is as follows:

A kind of tire ground pressure DYNAMIC DISTRIBUTION real-time measurement apparatus, it is characterized in that, comprise test board, data scanning instrument, data buffer and computing machine, in the described test board pressure transducer is set, described pressure transducer links to each other by data line with the data scanning instrument, and data buffer is arranged in the data scanning instrument, by data line and computing machine communication, described test board is a steel base, lays asphalt concrete layer on it, and described pressure transducer is embedded in the concrete layer.

Described test board can be embedded in the road surface inside surface and flush with the road surface, allows vehicle directly travel by on it;

The advantage that the utlity model has: (1) this equipment is embedded in the bituminous concrete pedestal by the sensor that will have the three-dimensional measurement ability, can with the road surface compatible deformation, on stressed, approach actual road surface effect more, guaranteed the reliability of measurement result; (2) sensor is embedded in the bituminous concrete, has avoided the space between the sensor, has avoided the stressed increase of sensor that reduces to cause owing to lifting surface area, thereby has reduced measuring error; (3) because sensor has been carried out high frequency sweep, therefore can realize high-speed data acquisition, can measure the tire that passes through at a high speed that the field high-speed that can finish outside the testing laboratory is measured, this is that other equipment do not possess at present; (4) adopt computing machine that measurement data is handled, improved the processing power to data greatly, this also is the ability that do not have of equipment in the past; (5) measurement can be adopted manually and automatic two kinds of measurement patterns, and metering system is convenient flexibly; (6) equipment integration degree height is convenient to transportation and is carried, the laboratory and on-the-spot can both be good carry out measurement, but have good expansion capability.

The utility model adopts the bituminous concrete plummer, and buries array pressure sensor underground on its surface, has not only eliminated and has adopted the distortion problem of disharmony of rigidity plummer, and eliminated the space between the sensor simultaneously, has improved the precision of measuring greatly; Adopted high-speed data acquisition equipment, sensor array is carried out high-frequency scanning and high-speed cache, realized highly sensitive, measurement at a high speed to pressure data, the kinetic measurement that the tire ground pressure is distributed becomes possibility.On-the-spot achieved reliability test shows, this utility model can be carried out dynamic ground pressure to the driving vehicle of travel speed up to 160 kilometers and accurately measured, reliable measuring data, thus realized kinetic measurement veritably.Therefore total loading that the utility model is measured the vehicle single-wheel can carry out the kinetic measurement of different travel speeds to various vehicle up to 24 tons; Measurement data is reliable and stable, can be used for vehicular load research and Pavement Design, has great importance for the accuracy that improves the traffic parameter analysis and the reliability of Pavement Design.

Description of drawings

Fig. 1 is tire ground pressure DYNAMIC DISTRIBUTION real-time measurement apparatus figure;

Fig. 2 arranges vertical view for the test board upper sensor

Embodiment

Further specify the utility model below in conjunction with accompanying drawing and specific embodiment.

As shown in Figure 1, the utility model tire ground pressure DYNAMIC DISTRIBUTION real-time measurement apparatus, comprise test board 1, data scanning instrument 2, data buffer 3 and computing machine 4, in the described test board 1 pressure transducer 5 is set, described pressure transducer 5 and data scanning instrument 2 link to each other by data line, data buffer 3 is arranged in the data scanning instrument, by data line and computing machine communication, described test board comprises steel base 11 and the asphalt concrete layer of laying on it 12, and described pressure transducer 5 is embedded in the concrete layer.

Test board is of a size of: 600mm (length) * 600mm (wide) * 100mm (height), can bear 0～24 ton wheel load, and can be embedded in (surface flushes with the road surface) in the road surface, allow vehicle directly travel by on it; Steel base 11 thickness of described test board are 10mm, and asphalt concrete layer 12 thickness of laying on it are 90mm,

As shown in Figure 2, pressure transducer 5 test surfaces and asphalt concrete layer 12 flush.Described pressure transducer 5 is array and is staggered, and described pressure transducer has 23,1 ton of every sensor vertical force range, and the side force range is 500 kilograms, transducer spacing L is 50mm.Described data scanning instrument and every sensor 5 link, and, and image data are stored in the data buffer sensor scan with the frequency of 100Hz.After communication interface imports computing machine into and shows and record, supply the usefulness of post analysis.

The utility model workflow is as follows:

A) at first test board is embedded in test site, its surface is flushed with the road surface, steadily pass through to guarantee vehicle or aircraft;

B) data connecting line with certain-length is connected the sensor in the test board with the data scanning instrument, and the data scanning instrument is placed in the safety zone, is connected with computer data interface again;

C) after definite reliable connection, system's energising starts;

D) test pattern is set in computer control software: (1) manual mode is fit to measure static load; (2) automatic mode is fit to measure the high speed wheel load;

E) under the manual mode, allow vehicle or aircraft reach test board, guarantee that tire just in time is positioned on the test board, start manual data then and gather button, the data that computing machine will show automatically and the record wheel tire pressure distributes;

F) under the automatic mode, at first start the automatic data acquisition button, system enters the data acquisition waiting status immediately, allows vehicle or aircraft pass through test board with certain travel speed, and dynamically the tire ground pressure under distributes and will be recorded automatically and show; Adopting the method to distribute to the tire ground pressure under the different travel speeds measures automatically;

G) measurement data will store the data file in the computing machine automatically into, in order to post analysis;

Basic functional principle of the present utility model is:

1) be embedded in sensor in the bituminous concrete, can with the road surface compatible deformation, on stressed, approach actual road surface effect more;

2) the vertical load range of each sensor is 1 ton, and the side force range is 500 kilograms, can realize the three-dimensional measurement to the tire ground pressure;

3) when tire acts on the test board, contact with sensor simultaneously, the sensor on the diverse location will measure the three-dimensional pressure value of this position;

4) the data scanning instrument scans sensor with 100Hz speed, and the data that scanning obtains are temporary in the impact damper, transfers to computing machine again;

5) computer software data that each position transducer is passed back are analyzed, and show and be recorded in the data file, for future use by graphics software.

Claims

1. tire ground pressure DYNAMIC DISTRIBUTION real-time measurement apparatus, it is characterized in that, comprise test board (1), data scanning instrument (2), data buffer (3) and computing machine (4), pressure transducer (5) is set in the described test board (1), described pressure transducer (5) links to each other by data line with data scanning instrument (2), data buffer (3) is arranged in the data scanning instrument (2), by data line and computing machine (4) communication, the asphalt concrete layer (12) that described test board (1) comprises steel base (11) and lays on it, described pressure transducer is embedded in the concrete layer (12).

2. tire ground pressure DYNAMIC DISTRIBUTION real-time measurement apparatus according to claim 1 is characterized in that the steel base of described test board (11) thickness is 10mm, and asphalt concrete layer (12) thickness of laying on it is 90mm.

3. tire ground pressure DYNAMIC DISTRIBUTION real-time measurement apparatus according to claim 1 is characterized in that, pressure transducer (5) test surfaces and asphalt concrete layer (12) flush.

4. tire ground pressure DYNAMIC DISTRIBUTION real-time measurement apparatus according to claim 1 is characterized in that described pressure transducer (5) is array and is staggered.

5. tire ground pressure DYNAMIC DISTRIBUTION real-time measurement apparatus according to claim 4 is characterized in that described pressure transducer (5) has 23,1 ton of every sensor vertical force range, and the side force range is 500 kilograms, transducer spacing 50mm.

6. tire ground pressure DYNAMIC DISTRIBUTION real-time measurement apparatus according to claim 5 is characterized in that, described data scanning instrument (2) links with every sensor (5).