CN114659603A - Road surface dynamic weighing system based on friction nanometer power generation effect - Google Patents
Road surface dynamic weighing system based on friction nanometer power generation effect Download PDFInfo
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- 238000005303 weighing Methods 0.000 title claims abstract description 68
- 230000000694 effects Effects 0.000 title claims abstract description 27
- 238000010248 power generation Methods 0.000 title claims abstract description 23
- 230000006698 induction Effects 0.000 claims abstract description 19
- 238000004891 communication Methods 0.000 claims abstract description 11
- 238000007405 data analysis Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000004806 packaging method and process Methods 0.000 claims abstract description 6
- 230000004044 response Effects 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 5
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- 230000008569 process Effects 0.000 claims description 4
- 230000001133 acceleration Effects 0.000 claims description 3
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- 238000005538 encapsulation Methods 0.000 claims description 3
- 238000010801 machine learning Methods 0.000 claims description 3
- 238000011002 quantification Methods 0.000 claims description 3
- 239000002344 surface layer Substances 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 claims description 3
- 238000010219 correlation analysis Methods 0.000 claims description 2
- 206010039203 Road traffic accident Diseases 0.000 abstract description 4
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/02—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles
- G01G19/03—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing during motion
- G01G19/035—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing during motion using electrical weight-sensitive devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
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- H02N1/04—Friction generators
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Abstract
The invention relates to a pavement dynamic weighing system based on a friction nanometer power generation effect, which comprises a dynamic weighing unit and a vehicle-mounted safety early warning unit, wherein the dynamic weighing unit comprises a dynamic vehicle-mounted induction main body and a plurality of packaging attachments positioned outside the dynamic vehicle-mounted induction main body, the vehicle-mounted safety early warning unit comprises a vehicle-mounted information communication module, a data analysis module and an early warning scheme module, and the dynamic vehicle-mounted induction main body acquires waveform information corresponding to an electric signal generated by a vehicle passing through by utilizing the friction nanometer power generation effect and transmits the waveform information to the vehicle-mounted safety early warning unit. Compared with the prior art, the method has the advantages of solving the interference of the vehicle speed on vehicle-mounted perception, accurately evaluating the vehicle information in real time, improving the driving safety, reducing traffic accidents, improving the road safety and the like.
Description
Technical Field
The invention relates to the field of dynamic weighing of asphalt pavements, in particular to a pavement dynamic weighing system based on a friction nanometer power generation effect.
Background
Research shows that at present, roads bear nearly 75% of the total cargo transportation function, and the truck overload phenomenon is up to 87%, which directly affects the functionality, durability, safety and functionality of road infrastructure. The service life of the road is reduced, traffic accidents are easily caused, and the serious problem of overload of road vehicles is urgently solved.
Vehicle weighing includes both static and dynamic types. The non-stop static weighing device is high in precision, but large in size, and easily causes escape of overloaded vehicles, traffic jam and even traffic accidents. Therefore, dynamic weighing technology becomes the mainstream weighing system, including three major types, namely, a table type weighing system, a belt type weighing system and a flexible weighing system. The weighing principle is as follows: due to the excitation of the road surface with different flatness, the vehicle generates vibrations which are further transmitted to the road surface system via the tires, resulting in the road surface being subjected to vibration loads in addition to the static load of the vehicle. In addition, the weighing system has the serious problems of poor sensitivity and low reliability under the coupling influence of the vehicle-road effect, environment and machinery.
Since the nineties of the last century, researchers are constantly searching for more convenient, effective and reliable dynamic weighing systems, and hopefully reducing the influence of external adverse factors on weighing accuracy and improving weighing efficiency as much as possible. It is worth noting that the friction nano power generation technology brings opportunity for the development of a road dynamic weighing system. The voltage of the vehicle can be used for static measurement (such as pressure), the current is suitable for dynamic sensing (such as speed), and the friction nano power generation technology is probably a novel technology capable of highly decoupling the vehicle speed and the vehicle-mounted coupling effect. In conclusion, the pavement dynamic weighing system based on the friction nanometer power generation effect can be designed, mechanical energy wasted by vehicle running in a road system is collected, and meanwhile, the electrical signal output by the pavement dynamic weighing system is utilized to dynamically sense vehicle load information, so that the pavement dynamic weighing system has a wide application prospect in the field of road engineering detection.
Disclosure of Invention
The invention aims to overcome the defects of poor sensitivity and low reliability in the prior art, and provides a dynamic road weighing system based on a friction nanometer power generation effect, which effectively solves the problem of interference of vehicle speed on vehicle-mounted perception, can accurately evaluate vehicle information in real time, improves driving safety, reduces traffic accidents, and has very important significance for improving road safety.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a road surface dynamic weighing system based on friction nanometer electricity generation effect, includes dynamic weighing unit and on-vehicle safety precaution unit, the dynamic weighing unit includes the on-vehicle response main part of developments and is located the outside a plurality of encapsulation appendages of the on-vehicle response main part of developments, on-vehicle safety precaution unit includes on-vehicle information communication module, data analysis module and early warning scheme module, the on-vehicle response main part of developments utilizes friction nanometer electricity generation effect, gathers the vehicle through the time waveform information that the signal of telecommunication that produces corresponds and sends on-vehicle safety precaution unit.
The dynamic weighing unit is provided with a pressure sensor and an acceleration sensor, so that calibration work is conveniently carried out.
The dynamic weighing units are distributed in a surface layer structure of a high-grade road surface in an array mode, the depth range is 0-200 mm, and the high-grade road surface comprises a highway junction, a viaduct and a tunnel.
The structure of the packaging attachment body is specifically a cylinder or a cube, and the corresponding size range is 50-150 mm.
Furthermore, the packaging attachment body comprises a spring, an elastic sponge and a pressure-bearing steel plate from inside to outside respectively.
Further, the spring can play a role in assisting the reciprocating contact-separation of the dynamic vehicle-mounted induction main body based on the friction nanometer power generation effect; the elastic sponge is used for protecting the dynamic vehicle-mounted induction main body and releasing pressure; the outermost layer of the pressure-bearing steel plate is mainly used for bearing a large amount of loads and has waterproof and anticorrosion functions, so that the dynamic weighing unit is prevented from being influenced by rainwater erosion and the like, and the service life of the dynamic weighing unit is prolonged.
The vehicle-mounted information communication module acquires waveform information sent by the dynamic vehicle-mounted induction main body in a wireless transmission mode.
Further, the waveform information includes waveform amplitude information, waveform frequency information, and waveform number information.
Further, the vehicle-mounted information communication module sends the waveform information sent by the dynamic vehicle-mounted induction main body to a Road Side Unit (RSU) of the intelligent road system, and the RSU performs storage and directional transmission.
The data analysis module comprises a calibration submodule and an application submodule, the calibration submodule acquires vehicle information, correlation analysis and quantification are carried out by combining waveform information, and a correlation relation between the vehicle information and a waveform signal of the dynamic vehicle-mounted sensing main body is established, so that a basis is provided for accurate judgment of the application module of the dynamic weighing system.
Further, the vehicle information includes vehicle speed information, vehicle-mounted information, vehicle type information, and axle type information.
Further, the application submodule performs data mining on output mass data by using a machine learning method according to the correlation relationship between vehicle information and the waveform signal of the dynamic vehicle-mounted induction main body, finally forms a visual result interface, realizes quick transmission to a vehicle-mounted APP terminal, and sends out safety early warning to a driver or a road management department through an early warning scheme module.
The dynamic weighing system also has the function of calculating and evaluating the overspeed and overload phenomena of the key road section through the waveform numerical value information fed back by the dynamic vehicle-mounted induction main body.
The dynamic weighing system also has the functions of collecting the number information of the passing vehicles, and counting the vehicles and judging the vehicle types according to the waveform interval time of the output signals.
Compared with the prior art, the invention has the following beneficial effects:
1. the high decoupling vehicle weighs the multifactor coupling, and the perception sensitivity is high: the road surface dynamic weighing system with the friction nanometer power generation effect utilizes the relevance of road surface speed and electrical signals of vehicle-mounted and dynamic vehicle-mounted sensing elements, avoids the interference of different factors on the signals of the sensing elements and realizes real-time and accurate sensing of road surface dynamic weighing.
2. Simple structure, low cost: the pavement dynamic weighing system does not adopt complex procedures such as complex macrostructure, a micro-chemical/physical etching process, micro-nano structure growth and the like, only utilizes materials which are frequently used in daily life and the principle that everything can generate electricity, and has wide material selection and low cost.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of a vehicle-mounted safety pre-warning unit according to the present invention;
FIG. 3 is a schematic representation of the result of the induction of an electrical signal as an empty toy test vehicle passes through an embodiment of the present invention;
FIG. 4 is a schematic diagram of the result of the electrical signal sensing of a toy vehicle with the addition of a 580g mass according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating a relationship between the sensing result and the mass of the electrical signal according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of the sensing results of a large press of the dynamic road weighing system in the embodiment of the invention;
fig. 7 is a schematic diagram of a real vehicle sensing result of the road surface dynamic weighing system in the embodiment of the invention.
Reference numerals:
1-a dynamic weighing unit; 11-dynamic vehicle-mounted induction main body; 12-package attachment; 2-vehicle safety early warning unit; 21-vehicle information communication module; 22-a data analysis module; 23-early warning scheme module; 221-a calibration submodule; 222-application submodule.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
As shown in figure 1, a road surface dynamic weighing system based on friction nanometer power generation effect, including dynamic weighing unit 1 and on-vehicle safety precaution unit 2, dynamic weighing unit 1 includes dynamic on-vehicle response main part 11 and is located the outside a plurality of encapsulation appendages 12 of dynamic on-vehicle response main part 11, as shown in figure 2, on-vehicle safety precaution unit 2 includes on-vehicle information communication module 21, data analysis module 22 and early warning scheme module 23, dynamic on-vehicle response main part 11 utilizes friction nanometer power generation effect, gather the corresponding waveform information of the signal of telecommunication that the vehicle produced when passing through and send on-vehicle safety precaution unit 2 to.
The dynamic weighing unit 1 is provided with a pressure sensor and an acceleration sensor, so that the calibration work is conveniently carried out.
The dynamic weighing units 1 are distributed in a surface layer structure of a high-grade road surface in an array mode, the depth range is 0-200 mm, and the high-grade road surface comprises a highway junction, a viaduct and a tunnel.
The package attachment 12 is specifically a cylinder or a cube, and the corresponding dimension range is 50-150 mm.
The package 12 includes a spring, an elastic sponge and a pressure-bearing steel plate from the inside to the outside.
The spring can play a role in assisting the reciprocating contact-separation of the dynamic vehicle-mounted induction main body 11 based on the friction nanometer power generation effect; the elastic sponge is used for protecting the dynamic vehicle-mounted induction main body 11 and releasing pressure; the outermost layer of the pressure-bearing steel plate is mainly used for bearing a large amount of load and has waterproof and anticorrosion functions, so that the dynamic weighing unit 1 is prevented from being influenced by rain wash and the like, and the service life of the dynamic weighing unit is prolonged.
The vehicle-mounted information communication module 21 acquires the waveform information sent by the dynamic vehicle-mounted induction main body 11 in a wireless transmission mode.
The waveform information includes waveform amplitude information, waveform frequency information, and waveform number information.
The vehicle-mounted information communication module 21 transmits the waveform information transmitted by the dynamic vehicle-mounted sensing body 11 to a Road Side Unit (RSU) of the intelligent road system, and the RSU performs storage and directional transmission.
The data analysis module 22 comprises a calibration submodule 221 and an application submodule 222, the calibration submodule 221 acquires vehicle information, performs relevance analysis and quantification by combining waveform information, and establishes a relevance relation between the vehicle information and a waveform signal of the dynamic vehicle-mounted sensing main body, so that a basis is provided for accurate judgment of the application module of the dynamic weighing system.
The vehicle information includes vehicle speed information, vehicle-mounted information, vehicle type information, and axle type information.
The application submodule 222 performs data mining on the output mass data by using a machine learning method according to the correlation relationship between the vehicle information and the waveform signal of the dynamic vehicle-mounted sensing main body, finally forms a visual result interface, realizes quick transmission to the vehicle-mounted APP terminal, and sends out safety early warning to a driver or a road management department through the early warning scheme module 23.
The dynamic weighing system also has the function of calculating and evaluating the overspeed and overload phenomena of the key road section through the waveform numerical value information fed back by the dynamic vehicle-mounted induction main body.
The dynamic weighing system also has the functions of collecting the number information of the passing vehicles, and counting the vehicles and judging the vehicle types according to the waveform interval time of the output signals.
Example one
In the embodiment, a toy car with the mass of 1099g is used as a test object, and the feasibility and the accuracy of the proposed road surface dynamic weighing system based on the friction nanometer power generation effect are preliminarily verified in a single-factor variable control method (the speed of the test car is controlled, and the vehicle is changed).
Testing the unloaded vehicle: as shown in FIG. 3, the voltage of the front wheel and the rear wheel are both 25V, which shows that the mass distribution of the no-load test vehicle is relatively uniform. Based on the above, different mass blocks are further added into the test vehicle, and the electrical signal output under the action of the front wheel and the rear wheel under different mass is respectively researched.
As shown in FIG. 4, after a 860g mass is added to the test vehicle near the rear wheels, the voltage output signal under the action of the front wheels of the test object is 30V, and the voltage output signal under the action of the rear wheels of the test object is 77V. The increase rate of the voltage signal of the front wheel is 20 percent and is obviously lower than the increase rate of the voltage signal of the rear wheel by 208 percent. The mass is mainly positioned at the rear wheel, and the sensitivity of the system to the vehicle-mounted signal sensing is also implied.
Further, the output of the voltage signal of the original no-load test vehicle in the voltage signals after the rejection test vehicle is added with 580.9g, 860.9g and 1031.6g is shown in fig. 5, the specific voltage signal result is shown in table 1, and table 1 is as follows:
TABLE 1 Effect of Mass blocks on Voltage signals
| Vehicle mounted on/g | Front wheel voltage/V | Rear wheel voltage/V |
| 580.9 | 5 | 52 |
| 860.9 | 15 | 60 |
| 1031.6 | 25 | 66 |
Example two
In this embodiment, the sensing capability of the dynamic vehicle-mounted sensing main body completely protected by the packaging attachment to the standard axle load of the vehicle of 25kN and the actual sensitivity to the passing of a real vehicle are simulated by using a large-scale press.
In the embodiment, an MTS810 universal material testing machine is adopted to load at a speed of 36mm/min, and in the range of 0-26 kN, along with the continuous increase of the loading size, the electric signals obtained from the dynamic vehicle-mounted sensing main body are also increased continuously.
Further, the peak voltage analysis of the sensing body under different loads is extracted, as shown in fig. 6. As can be seen from FIG. 6, the slope of the load-voltage relationship is large in the range of 0 to 4.8kN, and becomes significantly gentle when the load is larger than 4.8 kN. The specification shows that 4.8kN is a load key value which is worthy of attention in the calibration process, and the load key value is particularly concerned in the actual numerical analysis.
According to the relationship in fig. 6, even in a large load range of 4.8-26kN, the sensitivity of the dynamic vehicle-mounted induction body protected by the invention to the load is as high as 39V/kN, and the feasibility of the dynamic weighing system to be protected is proved again.
Based on the road surface dynamic weighing system, the road surface dynamic weighing system is arranged in a road structure, a real vehicle experiment is carried out, and vehicle information is tested. As shown in fig. 7, according to the data waveform output in the real vehicle experiment, the voltage signal of the dynamic load sensing main body provided by the invention can be highly decoupled and fused with the vehicle speed and load information of vehicle dynamic weighing. Wherein, the vehicle information is evaluated by using the interval time delta t of two continuous peak waveform signals and the standard vehicle wheel base information L; the vehicle load information can be perceived from the peak value H.
In addition, it should be noted that the specific embodiments described in the present specification may have different names, and the above descriptions in the present specification are only illustrations of the structures of the present invention. All equivalent or simple changes in the structure, characteristics and principles of the invention are included in the protection scope of the invention. Various modifications or additions may be made to the described embodiments or methods may be similarly employed by those skilled in the art without departing from the scope of the invention as defined in the appending claims.
Claims (10)
1. The utility model provides a road surface dynamic weighing system based on friction nanometer electricity generation effect, its characterized in that, includes dynamic weighing unit (1) and on-vehicle safe early warning unit (2), dynamic weighing unit (1) includes dynamic on-vehicle response main part (11) and is located a plurality of encapsulation appendages (12) of dynamic on-vehicle response main part (11) outside, on-vehicle safe early warning unit (2) are including on-vehicle information communication module (21), data analysis module (22) and early warning scheme module (23), dynamic on-vehicle response main part (11) utilize friction nanometer electricity generation effect, gather the wave form information that the signal of telecommunication that the vehicle produced during the process corresponds and send on-vehicle safe early warning unit (2).
2. The system for dynamically weighing a pavement based on friction nano power generation effect according to claim 1, characterized in that the dynamic weighing unit (1) is provided with a pressure sensor and an acceleration sensor.
3. The pavement dynamic weighing system based on friction nanometer power generation effect as claimed in claim 1, wherein the dynamic weighing units (1) are distributed in the surface layer structure of high-grade pavement in an array manner, and the depth range is 0-200 mm.
4. The system for dynamically weighing a pavement based on the friction nano power generation effect according to claim 1, wherein the structure of the packaging appendage (12) is a cylinder or a cube, and the corresponding size range is 50-150 mm.
5. The system for dynamically weighing a pavement based on a friction nano power generation effect according to claim 4, characterized in that the packaging attachment (12) comprises a spring, an elastic sponge and a pressure-bearing steel plate from inside to outside respectively.
6. The pavement dynamic weighing system based on the friction nanometer power generation effect as claimed in claim 1, wherein the vehicle-mounted information communication module (21) acquires waveform information sent by the dynamic vehicle-mounted induction main body (11) in a wireless transmission mode.
7. The system as claimed in claim 6, wherein the waveform information includes waveform amplitude information, waveform frequency information and waveform number information.
8. The system for dynamically weighing the pavement based on the friction nanometer power generation effect as claimed in claim 6, wherein the vehicle-mounted information communication module (21) transmits the waveform information transmitted by the dynamic vehicle-mounted induction main body to a road side unit of the intelligent road system, and the road side unit performs storage and directional transmission.
9. The pavement dynamic weighing system based on the friction nanometer power generation effect as claimed in claim 1, wherein the data analysis module (22) comprises a calibration sub-module (221) and an application sub-module (222), the calibration sub-module (221) acquires vehicle information, and performs correlation analysis and quantification by combining waveform information to establish a correlation relationship between the vehicle information and a dynamic vehicle-mounted induction main body waveform signal.
10. The pavement dynamic weighing system based on the friction nanometer power generation effect as claimed in claim 9, wherein the application sub-module (222) performs data mining on the output mass data by using a machine learning method according to the correlation relationship between the vehicle information and the waveform signal of the dynamic vehicle-mounted sensing main body, finally forms a visual result interface, and sends out safety early warning to a driver or a road management department through an early warning scheme module (23).
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