CN115164973B - Road surface ice accumulation monitoring method - Google Patents
Road surface ice accumulation monitoring methodInfo
- Publication number
- CN115164973B CN115164973B CN202210798166.7A CN202210798166A CN115164973B CN 115164973 B CN115164973 B CN 115164973B CN 202210798166 A CN202210798166 A CN 202210798166A CN 115164973 B CN115164973 B CN 115164973B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Traffic Control Systems (AREA)
Abstract
本发明公开了一种路面积冰监测方法，属于道路监测技术领域，具体方法包括：步骤一：设置路面积冰积水传感器，标记为监测传感器；步骤二：获取需要进行路面积冰积水监测的路段，确定监测区；步骤三：根据设置的监测区进行放样，获得放样区，在放样区内选择监测点；步骤四：在监测点处安装监测传感器，并在道路模型中进行相应的标记；步骤五：实时获取各个监测传感器的监测结果，并在道路模型中进行实时显示；通过利用微波的传输一致性，抗干扰能力强的属性，将监测传感器安装在公路表面，监测传感器与地表温度可保持一致，可真实判断路面状况；通过加入了高精度的温度传感器，可在对积冰判断的初始条件进行界定，大大减少误报率。
The present invention discloses a road ice accumulation monitoring method, which belongs to the technical field of road monitoring. The specific method comprises: step one: setting a road ice accumulation and water accumulation sensor, which is marked as a monitoring sensor; step two: obtaining a road section where road ice accumulation and water accumulation monitoring is required, and determining a monitoring area; step three: staking out according to the set monitoring area, obtaining the staking out area, and selecting monitoring points within the staking out area; step four: installing the monitoring sensor at the monitoring point, and making corresponding marks in a road model; step five: obtaining the monitoring results of each monitoring sensor in real time, and displaying them in real time in the road model; by utilizing the transmission consistency and strong anti-interference ability of microwaves, the monitoring sensor is installed on the road surface, the monitoring sensor and the surface temperature can be kept consistent, and the road surface condition can be truly judged; by adding a high-precision temperature sensor, the initial conditions for judging ice accumulation can be defined, which greatly reduces the false alarm rate.
Description
Technical Field
The invention belongs to the technical field of road monitoring, and particularly relates to a road ice accumulation monitoring method.
Background
In winter, due to weather, when ice accumulation and water accumulation occur on expressways and highway pavement, the pavement can be wet and slippery, and when the vehicle runs, the braking distance of the vehicle becomes large, and serious traffic accidents such as rear-end collision and chain collision of the vehicle are easy to occur. At present, the traffic management department does not have a monitoring method aiming at ice accumulation, water accumulation, ice accumulation thickness and road surface wet skid coefficient of the road surface, and cannot monitor the road surface condition on line in real time. Therefore, the invention provides a road ice accumulation monitoring method which is used for solving the technical problems that the existing expressway and highway are difficult to monitor ice coating and accumulated water.
Disclosure of Invention
In order to solve the problems of the scheme, the invention provides a road ice accumulation monitoring method.
The aim of the invention can be achieved by the following technical scheme:
a road surface ice accumulation monitoring method specifically comprises the following steps:
step one, setting a road ice accumulation sensor, namely a monitoring sensor;
step two, acquiring a road section needing to be monitored for ice accumulation and water accumulation on the road surface, and determining a monitoring area;
step three, lofting is carried out according to the set monitoring area, a lofting area is obtained, and monitoring points are selected in the lofting area;
step four, installing a monitoring sensor at a monitoring point and marking the road model correspondingly;
And fifthly, acquiring monitoring results of each monitoring sensor in real time and displaying the monitoring results in real time in the road model.
The structure of the monitoring sensor comprises a shell, a transmission wire, insulating waterproof resin and a microwave generation and temperature acquisition module, wherein an upper installation chamber and a lower installation chamber are arranged in the shell, the upper installation chamber and the lower installation chamber are respectively a first installation chamber and a second installation chamber, a plurality of through grooves are formed in the top surface of the shell, the through grooves are communicated with the first installation chamber, the microwave generation and temperature acquisition module is fixedly connected in the second installation chamber, the transmission wire is fixedly connected in the first installation chamber, the transmission wire is connected with the microwave generation module, and the insulating waterproof resin is injected below the transmission wire.
Further, the monitoring sensor monitors ice accumulation and water accumulation on the road surface by utilizing the attribute of high transmission consistency and high anti-interference capability of microwaves, and the working method comprises the following steps:
generating microwaves through a microwave generating module, transmitting the microwaves on a transmission wire, acquiring the propagation speed of the microwaves on the transmission wire, and calculating the dielectric constant epsilon of the current transmission wire according to the acquired microwave transmission speed;
Acquiring the acquisition temperature of the temperature acquisition module in real time, setting a preset temperature, comparing the acquired acquisition temperature with the preset temperature, judging that the current road surface is ice accumulation when the acquisition temperature Te is less than 0.4 ℃ and the dielectric constant epsilon is 5> 4, and judging that the current road surface is water accumulation when the dielectric constant epsilon is 45< 80.
Further, the method for determining the monitoring area comprises the following steps:
The road section to be monitored for ice accumulation and water accumulation on the road surface is marked as a monitored road section, a monitored road section information graph is obtained, a road model is built according to the obtained monitored road section information graph, an interval of a monitored area is obtained, a corresponding initial monitored area is set in the road model, central coordinates of the initial monitored area are identified, the identified central coordinates are marked in the road model, the corresponding monitored area is determined based on the current road model, and marking is carried out in the road model.
Further, the road model is a three-dimensional data model.
Further, the method for determining the corresponding monitoring area based on the current road model comprises the following steps:
The method comprises the steps of identifying elevation data of a road surface of a monitored road section, marking the center line of the road in a road model, calculating the average elevation of the road surface of the monitored road section by taking the center line as a reference, replacing the center line of the road with an elevation curve according to the calculated average Gao Chenghui elevation curve, obtaining design elevation data of the monitored road section, marking curve sections lower than the corresponding design elevation in the elevation curve as low-lying sections, integrating central coordinates of the elevation curve, interval sections and initial monitoring sections as road section analysis data, establishing a road section analysis model, analyzing the road section analysis data through the road section analysis model to obtain corresponding monitoring areas to be selected, integrating the monitoring areas to be selected with conflict attributes as a screening set, sequencing the priority of the monitoring areas to be selected in the screening set to obtain the corresponding monitoring areas, and carrying out corresponding marking on the obtained monitoring areas in the road model.
Further, the method for prioritizing the to-be-selected monitoring areas in the screening set comprises the following steps:
The method comprises the steps of marking a monitoring area to be selected as i, wherein i=1, 2 and the numbers of the monitoring areas to be selected are positive integers, obtaining the lowest point elevation of each monitoring area to be selected, marking the lowest point elevation as GDi, setting the reference elevation as CG, obtaining the area of the elevation of each monitoring area to be selected, which is lower than the reference elevation, marking the area as CMi, calculating the priority value of each monitoring area to be selected according to the formula Qi=b1× (GDi-CG) +b2×CMi, sorting according to the calculated priority value, and selecting the monitoring area to be selected with the first sorting as the monitoring area.
Further, the road section analysis model is built based on a CNN network or a DNN network.
Compared with the prior art, the invention has the beneficial effects that the monitoring sensor is arranged on the surface of the highway by utilizing the attribute of high transmission consistency and high anti-interference capability of microwaves, the monitoring sensor can keep consistent with the surface temperature, the road surface condition can be truly judged, the high-precision temperature sensor is added to define the initial condition for ice accumulation judgment, the false alarm rate is greatly reduced, the gap of automatic monitoring of ice accumulation and water accumulation on the road surface is filled, and the help is provided for road maintenance monitoring and early warning by utilizing the characteristics of low power consumption, high stability and accurate precision of the monitoring sensor.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a flow chart of the method of the present invention;
FIG. 2 is a schematic diagram of the structure of the monitoring sensor of the present invention.
In the figure, 1, a transmission wire, 2, insulating waterproof resin, 3, a microwave generation and temperature acquisition module and 4, a shell.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 2, a method for monitoring ice accumulation on a road surface specifically includes:
step one, setting a road ice accumulation sensor, namely a monitoring sensor;
The structure of the monitoring sensor comprises a shell 4, a transmission wire 1, an insulating waterproof resin 2 and a microwave generation and temperature acquisition module 3, wherein the shell 4 can be an aviation aluminum shell or other materials with the same function; the size of the shell can be 8cm x 8cm, an upper mounting chamber and a lower mounting chamber are arranged in the shell 4, the upper mounting chamber and the lower mounting chamber are respectively a first mounting chamber positioned above and a second mounting chamber positioned below, the top surface of the shell 4 is provided with a plurality of through grooves, the through grooves are communicated with the first mounting chamber, a microwave generation and temperature acquisition module 3 is fixedly connected in the second mounting chamber, the microwave generation and temperature acquisition module 3 is the sum of the microwave generation module and the temperature acquisition module, and in order to facilitate corresponding display in the drawing, the microwave generation and temperature acquisition module is not a module and has the functions of microwave and temperature acquisition, but if the common module for realizing the functions of the microwave generation and temperature acquisition module is provided in the prior art, the common module can be replaced, a transmission wire 1 is fixedly connected in the first mounting chamber, the transmission wire 1 is connected with the microwave generation module, and insulating waterproof resin 2 is injected below the transmission wire 1, so that the microwave generation and temperature acquisition module 3 is prevented from being broken down;
the monitoring sensor monitors ice accumulation and water accumulation on a road surface by utilizing the attribute of high transmission consistency and high anti-interference capability of microwaves, and the working method comprises the following steps:
The microwave generation module generates microwaves, and the generated microwaves are exemplified as 400M microwaves, and the microwaves are transmitted on the transmission wire 1 to obtain the propagation speed of the microwaves on the transmission wire 1, and the dielectric constant epsilon of the current transmission wire 1 is calculated according to the obtained microwave transmission speed, because after ice or water is coated on the transmission wire 1, the microwave transmission speed is influenced due to the change of the dielectric constant;
Acquiring acquisition temperature of a temperature acquisition module in real time, wherein the temperature acquisition module is an existing high-precision temperature sensor, selecting according to actual needs, setting preset temperature, generally at 0.4 ℃, comparing the acquired acquisition temperature with the preset temperature, judging that the current road surface is ice accumulation when the acquisition temperature Te is less than 0.4 ℃ and the dielectric constant epsilon is 5> 4, and judging that the current road surface is water accumulation when the dielectric constant epsilon is 45< 80.
The specific calculation of the microwave transmission rate and the calculation of the dielectric constant epsilon of the transmission line 1 from the microwave transmission rate are all possible by the prior art and will not be described in detail.
By utilizing the attribute of strong interference resistance of the transmission consistency of microwaves, the monitoring sensor is arranged on the surface of the highway, the temperature of the monitoring sensor and the surface temperature can be kept consistent, and the pavement condition can be truly judged; the invention fills the blank of automatic monitoring of ice accumulation and water accumulation on the road surface, and helps to realize road maintenance monitoring and early warning by utilizing the characteristics of low power consumption, high stability and accurate precision of the monitoring sensor.
Step two, acquiring a road section needing to be monitored for ice accumulation and water accumulation on the road surface, and determining a monitoring area;
the method for determining the monitoring area comprises the following steps:
Marking a road section which needs to be monitored by ice accumulation and water accumulation on a road surface as a monitored road section, acquiring a monitored road section information graph which is a drawing capable of representing information of the monitored road section, such as a measuring drawing, a construction drawing and the like, and representing the information of the current monitored road section, building a road model according to the acquired monitored road section information graph, wherein the road model is a three-dimensional data model built based on current modeling software and is used for intuitively displaying road information, acquiring an interval of the monitored area, wherein the interval is a monitoring point which needs to be set in a range according to road monitoring requirements or demands and is used for installing a monitoring sensor, setting a corresponding initial monitored area in the three-dimensional data model, wherein the initial monitored area is set according to a starting point and an ending point of the monitored road section, and is generally a monitored area which needs to be set according to actual requirements, and the central coordinates of the initial monitored area can be adjusted according to actual requirements, the initial monitored area is generally rectangular, the width is the road width, and the length is set by an expert group according to road specification, the monitoring area is mainly used for corresponding monitoring point range when the monitoring sensor is installed, the corresponding position area can be quickly determined, the installation efficiency is quickened, and the central coordinates are recognized in the road model is determined in the current road model based on the road model.
The method for determining the corresponding monitoring area based on the current road model comprises the following steps:
Identifying elevation data of a road surface of a monitored road section, marking the center line of the road in a road model, namely the center line of the monitored road section, calculating the average elevation of the road surface of the monitored road section by taking the center line as a reference, namely taking the center point as a reference, calculating the average elevation in the width direction, replacing the elevation curve with the center line of the road according to the calculated average Gao Chenghui elevation curve, obtaining design elevation data of the monitored road section, marking curve sections lower than the corresponding design elevation in the elevation curve as low-lying sections, integrating the central coordinates of the elevation curve, the interval section and the initial monitoring section as road section analysis data, establishing the road section analysis model, analyzing the road section analysis data by the road section analysis model, obtaining corresponding monitoring areas to be selected, integrating the monitoring areas to be selected with conflict attributes as a screening set, wherein the 5 monitoring areas to be selected with the conflict attributes are exemplified, one monitoring area to be selected as the monitoring area to be selected with the conflict attributes, and the monitoring areas to be selected in the 5 monitoring areas to be selected with the conflict attributes, and the monitoring areas to be selected in the screening set to be selected in priority, obtaining the corresponding monitoring areas, and marking the road model.
The road section analysis model is built based on a CNN network or a DNN network, and is trained by building a corresponding training set based on road section analysis data, and the specific building and training process is common knowledge in the art, and is not described in detail.
The method for prioritizing the to-be-selected monitoring areas in the screening set comprises the following steps:
The method comprises the steps of marking a monitoring area to be selected as i, wherein i=1, 2 and the number of the monitoring areas to be selected are positive integers, obtaining the lowest point elevation of each monitoring area to be selected, marking the lowest point elevation of each monitoring area to be selected as GDi, setting a reference elevation according to an elevation curve, if the average elevation of the elevation curve can be selected, marking the reference elevation as CG, obtaining the area of the elevation of each monitoring area to be selected, which is lower than the reference elevation, marking the area of the area to be selected as CMi, calculating the priority value of each monitoring area to be selected according to the formula Qi=b1× (GDi-CG) +b2×CMi, sorting according to the calculated priority value, and selecting the monitoring area to be selected with the first sorting as the monitoring area.
Step three, lofting is carried out according to the set monitoring area, a lofting area is obtained, and monitoring points are selected in the lofting area;
According to the existing lofting method and tool, the corresponding lofting area can be obtained according to the coordinates of the monitoring area, the roadsides are not absolutely smooth due to various reasons in the pavement construction process, certain fluctuation exists even in the area in the lofting area, therefore, a specific monitoring point needs to be selected by an installer to serve as the monitoring point in the lofting area, meanwhile, the influence on traffic in the installation process is considered, the setting is carried out according to the actual installation situation, the corresponding lofting area is determined, the phenomenon that the setting deviation of the monitoring point is overlarge does not occur, the installation efficiency is improved through the combination of the two, unnecessary data processing is reduced, and meanwhile, the influence on traffic in the installation process is reduced.
Step four, installing a monitoring sensor at a monitoring point and marking the road model correspondingly;
And fifthly, acquiring monitoring results of each monitoring sensor in real time and displaying the monitoring results in real time in the road model.
The above formulas are all formulas with dimensions removed and numerical values calculated, the formulas are formulas which are obtained by acquiring a large amount of data and performing software simulation to obtain the closest actual situation, and preset parameters and preset thresholds in the formulas are set by a person skilled in the art according to the actual situation or are obtained by simulating a large amount of data.
The above embodiments are only for illustrating the technical method of the present invention and not for limiting the same, and it should be understood by those skilled in the art that the technical method of the present invention may be modified or substituted without departing from the spirit and scope of the technical method of the present invention.
Claims (5)
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| CN202210798166.7A CN115164973B (en) | 2022-07-06 | 2022-07-06 | Road surface ice accumulation monitoring method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514702A (en) * | 2019-08-08 | 2019-11-29 | 中电共建科技(北京)有限公司 | A kind of pavement of road state monitoring apparatus, early warning system and method for early warning |
| CN111366932A (en) * | 2018-12-26 | 2020-07-03 | 中国科学院声学研究所 | An icing sensor based on surface acoustic wave oscillator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6995572B2 (en) * | 2001-03-05 | 2006-02-07 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Sensor and method for detecting a superstrate |
| US6695469B2 (en) * | 2001-11-19 | 2004-02-24 | Energy Absorption Systems, Inc. | Roadway freezing point monitoring system and method |
| KR101303801B1 (en) * | 2010-09-13 | 2013-09-04 | 주식회사 제이캐스트 | System for icing detection using electromagnetic wave |
| CN109872553A (en) * | 2019-03-13 | 2019-06-11 | 中电共建科技(北京)有限公司 | A kind of safety pre-warning system and method for converging |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111366932A (en) * | 2018-12-26 | 2020-07-03 | 中国科学院声学研究所 | An icing sensor based on surface acoustic wave oscillator |
| CN110514702A (en) * | 2019-08-08 | 2019-11-29 | 中电共建科技(北京)有限公司 | A kind of pavement of road state monitoring apparatus, early warning system and method for early warning |
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