CN111781167A - Vehicle-mounted road weather detection device, system, method and computer-readable storage medium - Google Patents

Abstract

The invention provides a vehicle-mounted road weather detection device, a system, a method and a computer readable storage medium, which are arranged on a vehicle body of a motor vehicle and comprise the following components: a housing; the road surface meteorological sensor is used for detecting road surface meteorological information in real time; and the processing unit is connected with the road surface meteorological sensor and is used for processing the road surface meteorological information. The vehicle-mounted road weather detection device optimizes the detection method, the measurement working principle, the pollution resistance and splashing prevention capacity and the shock resistance of the traditional traffic weather road surface sensor, improves the data acquisition and transmission speed, and can monitor parameters such as dry road surface, humidity, accumulated water, ice-water mixture, icing, accumulated snow, cover thickness, wet slip coefficient and the like in real time.

Description

Vehicle-mounted road weather detection device, system, method and computer-readable storage medium

Technical Field

The invention relates to the technical field of intelligent traffic and road perception, in particular to a vehicle-mounted road weather detection device, system and method and a computer readable storage medium.

Background

In recent years, the highway infrastructure in China is rapidly developed, the influence of extremely severe weather such as icy road, snow, high temperature, strong wind, heavy fog, heavy rain and the like on traffic safety is more and more prominent, great risk is brought to the driving of motor vehicles on the highway, and not only is the traffic transportation seriously influenced, but also the serious loss of national property and people's life and property is caused. Meanwhile, with the rapid development of the automatic driving technology, the real-time monitoring and early warning requirements of vehicle-mounted road traffic weather are more outstanding.

Compared with the conventional meteorological monitoring, the monitoring of road traffic meteorological conditions focuses more on monitoring of factors such as road pavement states influencing traffic safety, visibility influencing observation sight of drivers, high temperature influencing vehicles and facilities, strong wind and the like. At present, common traffic weather monitoring equipment comprises highway full-factor stations with the intervals of 25-50 KM and local stations arranged in key areas with frequent weather disasters, and weather monitoring points are arranged discretely relative to the trend of highway traffic, so that the phenomena of poor weather measurement data representativeness, missing report and false report of weather information early warning of equipment mounting points cannot be avoided. The invention can detect the road surface state, the road surface temperature, the wet and slippery coefficient, the air temperature, the air humidity, the covering thickness and other factors in a whole road section at high speed and in real time, and can be conveniently arranged at the bottom and the outer side of the motor vehicle. The vehicle-mounted weather monitoring system meets the requirements of monitoring the weather information of the motor vehicles of the road operation and maintenance unit in real time all road sections while meeting the detection of vehicle-mounted weather.

The road traffic meteorological detection device of fixed point installation all has at present bulky, and measured data updates slowly, and the structure does not support the quick travel on-vehicle, and does not have antipollution and prevents the protection device that splashes. For example, a sensor for detecting the road surface state/the road surface temperature mostly adopts an embedded road surface sensor or a non-contact road surface sensor at present, the embedded road surface needs to be excavated, and the sensor does not support mobile detection, and the non-contact road surface sensor installed on the roadside has the defects of low sampling speed (the state updating speed is 30 seconds or even minutes), large volume, inconvenient installation, weak shock resistance, incapability of meeting the requirement of accurate and rapid acquisition and output of the road surface state in the operation of a motor vehicle, and no support for mobile detection. The non-contact type road surface sensor also has the requirement of locking a detected target road surface, new calibration is needed when the target position is replaced, and otherwise, the state updating error is large, so that the non-contact type road surface sensor is not suitable for a vehicle-mounted application environment.

Disclosure of Invention

The invention aims to solve the technical problem of providing a vehicle-mounted road weather detection device which can monitor parameters such as dry road surface, humidity, accumulated water, ice-water mixture, ice, snow, cover thickness, wet slip coefficient and the like in real time, can realize high-speed detection, is beneficial to meeting the requirements of traffic management and participants on road weather real-time data and warning, and promotes the development of current intelligent traffic and automatic driving technologies.

In order to solve the above technical problems, the present invention provides a vehicle-mounted road weather detection device, which is mounted on a vehicle body of a motor vehicle, and includes: a housing; the road surface meteorological sensor is used for detecting road surface meteorological information in real time; and the processing unit is connected with the road surface meteorological sensor and is used for processing the road surface meteorological information.

The vehicle-mounted road weather detection device has the beneficial effects that: the method optimizes the detection method, the measurement working principle, the anti-pollution anti-splashing capability and the anti-seismic capability of the traditional traffic meteorological road surface sensor, improves the data acquisition transmission speed, expands the wireless transmission mode, supports the aspects of Bluetooth/4G/5G transmission, reduces the power consumption, adapts to a vehicle-mounted power supply and the like, can monitor parameters such as road surface dryness, dampness, water accumulation, ice water mixture, ice, snow cover, cover thickness, wet slip coefficient and the like in real time, can realize high-speed detection, improves the updating frequency of the road surface state from the original 30 seconds or a few minutes to the frequency of 40 times in one second, has the road surface data acquisition distance resolution ratio of less than 1 meter, and adapts to the rapid measurement of the traffic meteorological elements such as the road surface state, the road surface temperature, the air temperature, the humidity, the dew point, the frost point and the like and the longitude, Storage, sharing and early warning. The real-time traffic meteorological data with high resolution of all road sections are provided for vehicle and road operation management departments, the requirements of traffic management and participants on the real-time traffic meteorological data and warning are favorably met, and the development of the current intelligent traffic and automatic driving technology is promoted.

Preferably, the road surface weather sensor includes: the infrared laser emission module emits infrared laser to a road surface; a receiving part that receives infrared laser light reflected from a road surface for detecting a road surface state and cover information; the air temperature and humidity detection unit is used for detecting the temperature and humidity of the air on the road surface; and the road surface temperature detection unit is used for detecting the road surface temperature.

Preferably, the device further comprises a detection area laser pointer; the infrared laser emission module includes: the device comprises a first infrared laser emission module, a second infrared laser emission module and a control module, wherein the working wavelength range of the first infrared laser emission module is 1290-1350 nanometers; the working wavelength range of the second infrared laser emission module is 1460-1520 nanometers; the working wavelength range of the third infrared laser emission module is 1640-1700 nanometers; the first infrared laser emitting module, the second infrared laser emitting module, the third infrared laser emitting module, the road surface temperature detecting unit, the air temperature and humidity detecting unit, the detection area laser indicator and the receiving component are distributed on the same detection end face; the first infrared laser emitting module, the second infrared laser emitting module, the third infrared laser emitting module, the road surface temperature detecting unit, the air temperature and humidity detecting unit and the laser indicator are distributed around the receiving component, and the receiving component is positioned in the middle.

Preferably, the first infrared laser emission module, the second infrared laser emission module and the third infrared laser emission module adopt different modulation frequencies and emit light simultaneously; after the receiving component receives the signals, the signals are processed by a high-precision low-noise discharge circuit, and then the signals simultaneously enter three high-Q value band-pass frequency-selective filter circuits with different central frequencies, wherein the central frequencies correspond to the previous driving modulation frequencies; the signals after frequency selection, filtering and amplification enter a multi-channel high-speed analog-digital acquisition unit, and the road surface state is measured in real time after analog-digital acquisition and calculation.

Preferably, the housing comprises: an outer shield and an inner shield; the outer protective cover and the inner protective cover jointly form a double-layer ventilation structure protective cover; the outer shield has a grid-shaped air guide hole.

Preferably, the housing is mounted on a fixed bracket; the height of the pavement meteorological sensor from the ground is 20-120 cm; the fixed bracket is a stainless steel bracket; the fixed angle included angle A of the fixed support ranges from 130 degrees to 155 degrees, and the corresponding horizontal included angle B of the measuring light beam and the road surface ranges from 40 degrees to 65 degrees; the vehicle-mounted road weather detection device is mounted at the front end of the motor vehicle, and/or the side surface of the motor vehicle, and/or the rear end of the motor vehicle, and/or the bottom of the motor vehicle.

The invention also provides a road meteorological detection system, comprising: the vehicle-mounted road weather detection devices are as described above; the terminal is connected with the vehicle-mounted road weather detection device in a wired or wireless manner, and receives, processes and forwards the road weather information acquired by the vehicle-mounted road weather detection device; the server side is in wireless connection with the terminal, and receives and processes the road meteorological information forwarded by the terminal;

and the client is in wireless connection with the terminal and receives and processes the road meteorological information forwarded by the terminal.

The road weather detection system has the beneficial effects that: the method optimizes the detection method, the measurement working principle, the anti-pollution anti-splashing capability and the anti-seismic capability of the traditional traffic meteorological road surface sensor, improves the data acquisition transmission speed, expands the wireless transmission mode, supports the aspects of Bluetooth/4G/5G transmission, reduces the power consumption, adapts to a vehicle-mounted power supply and the like, can monitor parameters such as road surface dryness, dampness, water accumulation, ice water mixture, ice, snow cover, cover thickness, wet slip coefficient and the like in real time, can realize high-speed detection, improves the updating frequency of the road surface state from the original 30 seconds or a few minutes to the frequency of 40 times in one second, has the road surface data acquisition distance resolution ratio of less than 1 meter, and adapts to the rapid measurement of the traffic meteorological elements such as the road surface state, the road surface temperature, the air temperature, the humidity, the dew point, the frost point and the like and the longitude, Storage, sharing and early warning. The real-time traffic meteorological data with high resolution of all road sections are provided for vehicle and road operation management departments, the requirements of traffic management and participants on the real-time traffic meteorological data and warning are favorably met, and the development of the current intelligent traffic and automatic driving technology is promoted.

The invention also provides a road weather detection method, which is applied to the road weather detection system and comprises the following steps: the vehicle-mounted road weather detection device collects road weather information in real time; the terminal receives road meteorological information acquired by the vehicle-mounted road meteorological detection device and processes and forwards the road meteorological information; the terminal remotely transmits the road meteorological data, the video and the image information to a background server or a cloud server through a communication network; and the back-end server or the cloud server performs big data analysis on the multiple groups of road meteorological data, videos and image real-time information and then pushes the information to information demand units or individuals.

The road weather detection method has the beneficial effects that: the method optimizes the detection method, the measurement working principle, the anti-pollution anti-splashing capability and the anti-seismic capability of the traditional traffic meteorological road surface sensor, improves the data acquisition transmission speed, expands the wireless transmission mode, supports the aspects of Bluetooth/4G/5G transmission, reduces the power consumption, adapts to a vehicle-mounted power supply and the like, can monitor parameters such as road surface dryness, dampness, water accumulation, ice water mixture, ice, snow cover, cover thickness, wet slip coefficient and the like in real time, can realize high-speed detection, improves the updating frequency of the road surface state from the original 30 seconds or a few minutes to the frequency of 40 times in one second, has the road surface data acquisition distance resolution ratio of less than 1 meter, and adapts to the rapid measurement of the traffic meteorological elements such as the road surface state, the road surface temperature, the air temperature, the humidity, the dew point, the frost point and the like and the longitude, Storage, sharing and early warning. The real-time traffic meteorological data with high resolution of all road sections are provided for vehicle and road operation management departments, the requirements of traffic management and participants on the real-time traffic meteorological data and warning are favorably met, and the development of the current intelligent traffic and automatic driving technology is promoted.

Preferably, the vehicle-mounted road weather detection device collects weather information, and the method comprises the following steps: starting optical window pollution detection and automatic correction; starting three frequency modulation lasers to emit simultaneously; starting a multi-channel module and simultaneously collecting three paths of laser signals, road surface infrared radiation signals and temperature and humidity signals after frequency-selective filtering, amplification and rectification; starting an infrared three-wavelength pavement analysis program to calculate pavement temperature, pavement state, covering thickness, wet-skid coefficient, air temperature and humidity, dew point and frost point; outputting the road meteorological information in real time, wherein the road meteorological information comprises: dry pavement, moisture, accumulated water, ice-water mixture, icing, accumulated snow, thickness of a covering, wet-skid coefficient, pavement temperature, air temperature and humidity, dew point, frost point, longitude and latitude, altitude and position information.

The invention also provides a computer-readable storage medium, on which a computer program is stored, characterized in that the program realizes the aforementioned method when executed by a processor.

The computer readable storage medium has the advantages that: the method optimizes the detection method, the measurement working principle, the anti-pollution anti-splashing capability and the anti-seismic capability of the traditional traffic meteorological road surface sensor, improves the data acquisition transmission speed, expands the wireless transmission mode, supports the aspects of Bluetooth/4G/5G transmission, reduces the power consumption, adapts to a vehicle-mounted power supply and the like, can monitor parameters such as road surface dryness, dampness, water accumulation, ice water mixture, ice, snow cover, cover thickness, wet slip coefficient and the like in real time, can realize high-speed detection, improves the updating frequency of the road surface state from the original 30 seconds or a few minutes to the frequency of 40 times in one second, has the road surface data acquisition distance resolution ratio of less than 1 meter, and adapts to the rapid measurement of the traffic meteorological elements such as the road surface state, the road surface temperature, the air temperature, the humidity, the dew point, the frost point and the like and the longitude, Storage, sharing and early warning. The real-time traffic meteorological data with high resolution of all road sections are provided for vehicle and road operation management departments, the requirements of traffic management and participants on the real-time traffic meteorological data and warning are favorably met, and the development of the current intelligent traffic and automatic driving technology is promoted.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic diagram of the system components according to an embodiment of the present invention;

FIG. 2 is a side view of the vehicle-mounted road weather detecting device according to the embodiment of the invention;

FIG. 3 is a front view of the vehicle-mounted road weather detecting device of the present invention;

FIG. 4 is a view showing the configuration of a circular detection window of the weather detection device for a vehicle-mounted road according to the present invention;

FIG. 5 is a schematic view of the working principle of the protective cover with a double-layer ventilation structure of the vehicle-mounted road weather detection device;

FIG. 6 is a functional block diagram of the handheld terminal of the present invention;

FIG. 7 is a schematic view of the working principle of the on-board road weather detection device of the present invention;

FIG. 8 is a schematic view of the vehicle weather detecting apparatus of the present invention;

FIG. 9 is a schematic view of the vehicle weather detecting device according to the present invention;

FIG. 10 is a high-speed measurement flowchart of the on-board road weather detection device of the present invention;

FIG. 11 is a flowchart of the operation of the road weather detection system of the present invention.

Detailed Description

The first embodiment,

In order to overcome the defects in the background technology, the invention provides a vehicle-mounted road weather detection device. The invention optimizes the detection method, the measurement working principle, the anti-pollution anti-splashing capability and the anti-seismic capability of the traditional traffic meteorological road surface sensor, improves the data acquisition transmission speed, expands the wireless transmission mode, supports the aspects of Bluetooth/4G/5G transmission, reduces the power consumption, adapts to a vehicle-mounted power supply and the like, can monitor parameters such as dry road surfaces, humidity, water accumulation, ice-water mixtures, ice, snow, cover thickness, wet slip coefficient and the like in real time, can realize high-speed detection, improves the updating frequency of the road surface state from the original 30 seconds or a few minutes to the frequency of 40 times, has the road surface data acquisition distance resolution ratio of less than 1 meter, and adapts to the rapid measurement of traffic meteorological factors such as the road surface state, the road surface temperature, the air temperature, the humidity, the dew point, the frost point and the like and longitude and the latitude and longitude and latitude, Storage, sharing and early warning. The method provides real-time traffic meteorological data with high resolution of all sections for motor vehicles and road operation management departments, is beneficial to meeting the requirements of traffic management and participants on the real-time traffic meteorological data and warning, and promotes the development of the current intelligent traffic and automatic driving technology.

In order to achieve the above purpose, the invention adopts the following technical scheme:

the utility model provides a vehicle-mounted road meteorological detection device, includes components such as real-time supervision client software in vehicle-mounted road meteorological detection device, the handheld terminal of vehicle-mounted, smart mobile phone APP, the PC computer. The vehicle-mounted road weather detection device further comprises: emission part, receiving element, road surface temperature detecting element, detection area laser designator, air temperature and humidity detecting element, casing, protection casing, fixed bolster, body pilot lamp, transmission cable etc. on-vehicle handheld terminal contains: the system comprises a data processing module, a GPS module, a Bluetooth communication module, a TF card storage module, a display operation module, a vehicle-mounted power line and the like.

The vehicle-mounted road weather detection device is characterized in that a state indicator lamp is arranged at the top end of a shell of the vehicle-mounted road weather detection device, a circular detection window is arranged at the front end of the shell, and an infrared laser emission module, a road surface temperature detection unit, an air temperature and humidity detection unit and a detection area laser indicator with three different wavelengths are arranged in the detection window. The outer side of the detection window is provided with a double-layer ventilation structure protective cover, when a motor vehicle runs at a high speed, the grid-shaped air guide holes of the outer protective cover can guide air flow to be divided, part of the air flow enters the space between the outer protective cover and the inner protective cover, the outer protective cover is extruded by part of the air flow, a path is changed, and the air resistance deformation pressure of the inner protective cover and the outer protective cover is reduced. The double-layer ventilation structure protective cover is of an integrated structure, supports quick disassembly and is convenient to clean.

On-vehicle road meteorological detection device's casing bottom be provided with fixed angle's metal fixed bolster, adopt stainless steel material to make, have higher mechanical strength and corrosion resistance, the fixed angle of support combines equipment weight and central distribution design, the general value range of contained angle A: 130-155 degrees, the corresponding measuring beam and the road surface are in the value range of a horizontal included angle B: 40-65 degrees, and the anti-seismic effect of the equipment is optimal when the motor vehicle runs at high speed.

The temperature measuring range of the road surface temperature detecting unit in the vehicle-mounted road weather detecting device is as follows: -40 to +80 ℃, measurement range of air temperature and humidity: the temperature is-40 to +60 ℃, and the relative humidity is 0-100%, so that the monitoring requirement of the vehicle-mounted mobile meteorological data is met.

The invention relates to a vehicle-mounted road weather detection device and a method, in particular to an application system which combines a wireless communication technology, a 5G network and a big data analysis storage technology, and aims to solve the problems that the conventional detection road surface detection device is slow in state updating and can not adapt to the requirements of vehicle-mounted weather monitoring and rapid detection, most of the conventional detection road surface detection device updates the road surface state (dry, wet, water accumulation, ice-water mixture, ice, snow, cover thickness and wet-slip coefficient) for more than 30 seconds, even a few minutes, the invention optimizes the detection method and the measurement principle, for example, as a high-speed measurement work flow chart of a vehicle-mounted road weather detection device shown in figure 10, after a DC/DC power supply system is input, the voltage is converted into the voltage value required by each functional module, a core data processing unit forms 3 driving signals with different frequencies through a time sequence control circuit and a modulation signal circuit to simultaneously light 3 infrared lasers with, drive frequency selection range: 1 KHZ-200 KHZ, and simultaneously driving 3 lasers with different modulation frequencies and wavelengths is a precondition and necessary condition for realizing high-speed acquisition of road surface state data. The characteristic wavelength ranges of the 3 kinds of infrared laser are respectively as follows: 1290-1350 nm, 1460-1520 nm and 1640-1700 nm. The infrared photoelectric receiving unit in the road meteorological monitoring unit can simultaneously and quickly acquire infrared laser signals with 3 characteristic wavelengths after diffuse reflection on a road surface, after the infrared laser signals are processed by a high-precision low-noise discharge circuit, the signals simultaneously enter 3 high-Q value band-pass frequency-selection filter circuits with different central frequencies, the central frequencies correspond to the previous driving modulation frequencies, the signals amplified by frequency-selection filtering enter the multi-channel high-speed AD acquisition unit, analog-to-digital conversion aiming at the infrared signals is realized, and the signals are input to the core data processing unit. When the road surface state is the states of moisture, water accumulation, ice-water mixture, snow accumulation and the like, the infrared signals with 3 different wavelengths change along with the change, the signal intensity is correlated with the thickness of the covering, and the core data carries out rapid software processing, calculation and output on the current road surface state (dry, moisture, water accumulation, ice-water mixture, ice and snow accumulation), the thickness of the covering, the wet-skid coefficient, the road surface temperature, the air temperature, the humidity, the dew point, the frost point and other traffic meteorological factors according to the signal relative to the dry background signal. And high-speed detection of road meteorological information during vehicle-mounted is further realized, the updating frequency of the road surface state is increased from the original 30 seconds or a few minutes to the frequency of 40 times in one second, and the resolution ratio of the road surface data acquisition distance can be smaller than 1 meter.

The vehicle-mounted road meteorological detection device and method have an automatic calibration function, the installation height of the device from the ground can adapt to 20-120 cm when the device works, and the device can be suitable for all conventional motor vehicles, such as cars, jeep, passenger cars, trucks, snow shovels, inspection vehicles and other vehicles.

When the vehicle-mounted road weather detection device and the method are used for vehicle-mounted measurement, due to the fact that the size is small, the installation position is flexible to select, front end installation, side installation, rear end installation and bottom installation of a motor vehicle are supported, due to the fact that air flows, tires of the motor vehicle are rolled and the heat source of the motor vehicle is interfered, the influence of different installation positions on measurement elements is different, and the fact that the number of the parts is plus in the table 1 indicates that: the influence is small, the measurement is suitable, the "-" coincidence means that the influence is large, the measurement is not suitable, and the specific influence degree is shown in the table 1:

TABLE 1

In fig. 1, the invention is a schematic diagram of a system composition, and the system comprises a shell 1, a status indicator lamp 2, an outer protective cover 3, an inner protective cover 4, an outer protective cover grid-shaped air vent 5, a metal fixing support 6, a vehicle-mounted handheld terminal 7, a transmission cable 8, a vehicle-mounted power line 9, a bluetooth signal 11, a smart phone 10, internal APP software, a PC mobile computer 12 and internal real-time monitoring client software.

In fig. 2, the side structure diagram of the vehicle-mounted road weather detection device of the invention comprises a shell 1, a status indicator lamp 2, an outer protective cover 3, an inner protective cover 4, an outer protective cover vent hole 5, a metal fixing support 6 and a support fixing angle a, wherein the included angle a generally has a value range: 130-155 degrees, and the anti-seismic effect of the equipment is optimal when the motor vehicle runs at high speed.

Fig. 3 is a front structure view of the vehicle-mounted road weather detection device of the invention, which comprises a status indicator lamp 2, an outer shield 3, an inner shield 4 and an outer shield grid air guide hole 5.

In fig. 4, the structure diagram of the circular detection window of the vehicle-mounted road weather detection device of the invention comprises an outer protective cover 3, an inner protective cover 4, an infrared laser emission module 13, an infrared laser emission module 14, a road surface temperature detection unit 15, an infrared laser emission module 16, an air temperature and humidity detection unit 17, a detection area laser indicator 18 and a receiving component 19. The system is characterized in that the circular detection window structure of the vehicle-mounted meteorological monitoring unit is provided with 7 functional modules simultaneously and distributed on the same detection end face, the detected road surface areas are unified, the receiving part 19 is arranged in the middle, and other 6 parts are distributed around the receiving part.

In the schematic diagram of the working principle of the double-layer ventilation structure protective cover of the vehicle-mounted road weather detection device in the invention shown in fig. 5, when the vehicle-mounted road weather detection device is installed on the side opposite to the driving direction, the front end air flow 5-1 impacts the double-layer ventilation structure protective cover when the motor vehicle runs, due to the unique double-layer structure design of the protective cover, when the motor vehicle runs at high speed, the outer protective cover has a grid-shaped air guide hole, the air flow 5-1 can be guided to be divided, part of the air flow 5-2 enters between the outer protective cover and the inner protective cover, other air flows extrude the outer protective cover to change the path, the path is bypassed by the outer protective cover, the inner air flow and the outer air flow are converged into the air flow 5-4, the divided air flow of the double-layer ventilation structure protective cover can play a role in reducing the air, when the motor vehicle runs at high speed and the road surface covers more objects, the lens can be well protected from splashing and vibration. The double-layer ventilation structure protective cover is of an integrated structure, supports quick disassembly and is convenient to clean.

Fig. 7 is a schematic diagram of the working principle of the vehicle-mounted road weather detection device of the invention, which comprises a vehicle-mounted power input DC/DC circuit, a signal processor (for measuring road surface temperature, road surface state, covering thickness, wet-skid coefficient, air temperature and humidity, dew point, frost point and generating early warning data), a road temperature measuring unit, a temperature and humidity measuring unit, a laser indicating unit, 3 modulation signal circuits, 3 laser transmitters, an infrared photoelectric receiving unit, 3 frequency-selecting filter circuits, a multi-channel high-speed a/D acquisition unit, a data output interface RS232/485, a front window heating control unit and the like.

In fig. 8, the installation schematic diagram of the vehicle-mounted weather detection device of the invention is generally suggested to be installed at the bottom of the front end of a large motor truck, a snow scraper, a passenger car and the like, and the installation height H can be selected to be 20 cm-120 cm away from the ground. The horizontal included angle A of the fixed angle of the vehicle-mounted road weather detection device support generally takes a value range: 130-155 degrees, the corresponding measuring beam and the road surface are in the value range of a horizontal included angle B: 40-65 degrees, and the anti-seismic effect of the equipment is optimal when the motor vehicle runs at high speed.

In fig. 9, the schematic diagram of the installation position selection of the vehicle-mounted weather detection device of the invention is that, because the detection device has a small volume and is flexible in installation position selection, the front end a installation, the side b installation, the rear end c installation and the bottom d installation of the motor vehicle are supported, because of the air flow, the rolling of the tires of the motor vehicle and the interference of the heat source of the motor vehicle, the influence of different installation positions on the measurement elements is different, and the appropriate installation position can be selected according to the conditions and the measurement requirements of the motor vehicle.

Example II,

The invention also provides a road meteorological detection system, comprising: the vehicle-mounted road weather detection device; the terminal receives and processes the road weather information acquired by the vehicle-mounted road weather detection device; the server receives and processes the road weather information acquired by the vehicle-mounted road weather detection device; and the client receives and processes the road weather information acquired by the vehicle-mounted road weather detection device.

The road weather detection system optimizes the detection method, the measurement working principle, the pollution and splashing resistance and the shock resistance of the traditional traffic weather road sensor, improves the data acquisition and transmission speed, expands the wireless transmission mode, supports the aspects of Bluetooth/4G/5G transmission, reduces the power consumption, adapts to a vehicle-mounted power supply and the like, can monitor parameters such as dry road surface, humidity, water accumulation, ice-water mixture, ice, snow, cover thickness, wet slip coefficient and the like in real time, can realize high-speed detection, improves the updating frequency of the road surface state from the original 30 seconds or minutes to the frequency of 40 times in one second, has the road surface data acquisition distance resolution ratio of less than 1 meter, and adapts to the rapid measurement of traffic weather elements such as the road surface state, the road surface temperature, the air temperature, the humidity, the dew point, the frost point and the like and longitude and the latitude and longitude and latitude information when a vehicle runs at, Storage, sharing and early warning. The real-time traffic meteorological data with high resolution of all road sections are provided for vehicle and road operation management departments, the requirements of traffic management and participants on the real-time traffic meteorological data and warning are favorably met, and the development of the current intelligent traffic and automatic driving technology is promoted.

In fig. 6, a schematic diagram of the vehicle-mounted handheld terminal 7 according to the present invention is shown, and the interior of the vehicle-mounted handheld terminal is composed of a data acquisition processing module 20, a GPS module 21, a bluetooth communication module 22, a TF card storage module 23, and a display operation module 24. The vehicle-mounted handheld terminal 7 has the main functions of power supply, acquisition, storage, display, high-speed transfer of Bluetooth data, GPS positioning, fault warning, maintenance and repair and the like.

The vehicle-mounted hand-held terminal of the vehicle-mounted road weather detection device has the main functions of power supply, acquisition, storage, display, high-speed transfer of Bluetooth data, GPS positioning, fault warning, maintenance and repair and the like. The vehicle-mounted handheld terminal adopts the special vehicle-mounted power line to get electricity from the inside of the vehicle-mounted power jack, and after rectification and voltage stabilization filtering, the power is supplied to the handheld terminal and the vehicle-mounted weather detection unit, the vehicle-mounted handheld terminal has the function of collecting the measured data of the vehicle-mounted weather detection unit in real time, and the touch screen display is carried out after processing, so that a driver can conveniently know the road weather data in time. The vehicle-mounted handheld terminal has a GPS positioning function, can monitor the longitude and latitude altitude of the equipment in real time, and synchronously stores the large-capacity TF card with the test data of the weather detection unit to completely record road weather data and distribution. The vehicle-mounted handheld terminal has a Bluetooth data high-speed transfer function, high-speed transfer of real-time measurement data of the meteorological detection unit can be rapidly carried out through Bluetooth to APP acquisition and analysis software of a smart phone or real-time monitoring client software in a PC, the rotation speed rate in the measurement data is 0-40 HZ per second, and the road data acquisition distance resolution ratio can be smaller than 1 meter within the range of 0-130 KM/H of the vehicle speed. The vehicle-mounted handheld terminal has the functions of fault detection and maintenance calibration, can monitor the working state and the alarm information of the meteorological detection unit in real time without the help of a computer, and is convenient for the use and maintenance of equipment.

In the vehicle-mounted road weather detection device and method, real-time monitoring client software in an intelligent mobile phone APP and a PC is a unit for further integrating and analyzing road weather data. As shown in fig. 11, which is a working flow diagram of the vehicle-mounted weather system of the present invention, the real-time monitoring client software in the smart phone APP and the PC can simultaneously perform video and image acquisition and storage of road conditions and analysis processing on the measurement data and images, besides receiving real-time measurement data of the weather detection unit at a high speed, to form real-time and future development trend early warning and the like on road weather information, and the data, the video and the images can be remotely transmitted through 4G/5G network signals to store a background server or a cloud server. The back-end server or the cloud server can analyze the big data of the real-time data of the vehicle-mounted road meteorological monitoring devices and then push the big data to relevant information demand units or individuals, so that the intelligent traffic monitoring system is beneficial to meeting the demands of intelligent traffic management and traffic participants on road meteorological data and warning, and the development of current intelligent traffic and automatic driving technology is promoted.

Embodiments of the present invention also provide that the vehicle-mounted handheld terminal may include Radio Frequency (RF) circuitry, memory including one or more computer-readable storage media, an input unit, a display unit, a sensor, audio circuitry, a wireless fidelity (WiFi) module, a processor including one or more processing cores, and a power supply. Those skilled in the art will appreciate that the configuration of the handheld terminal in a vehicle shown in the present embodiment does not constitute a limitation of the handheld terminal in a vehicle, and may include more or less components than those shown, or some components in combination, or a different arrangement of components. Wherein:

the RF circuit may be used for receiving and transmitting signals during information transmission and reception or during a call, and in particular, receives downlink information from a base station and then sends the received downlink information to one or more processors for processing; in addition, data relating to uplink is transmitted to the base station. Typically, the RF circuitry includes, but is not limited to, an antenna, at least one amplifier, a tuner, one or more oscillators, a Subscriber Identity Module (SIM) card, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In addition, the RF circuitry may also communicate with networks and other devices via wireless communications. The wireless communication may use any communication standard or protocol including, but not limited to, global system for mobile communications (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, short message Service (SM), etc.

The memory may be used to store software programs and modules, and the processor may execute various functional applications and data processing by operating the software programs and modules stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operation storage medium, an application program (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the in-vehicle handheld terminal, and the like. Further, the memory may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. Accordingly, the memory may further include a memory controller to provide access to the memory by the processor and the input unit.

The input unit may be used to receive input numeric or character information and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control. In particular, in one particular embodiment, the input unit may include a touch-sensitive surface as well as other input devices. The touch-sensitive surface, also referred to as a touch display screen or a touch pad, may collect touch operations by a user (e.g., operations by a user on or near the touch-sensitive surface using a finger, a stylus, or any other suitable object or attachment) thereon or nearby, and drive the corresponding connection device according to a predetermined program. Alternatively, the touch sensitive surface may comprise two parts, a touch detection means and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch detection device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor, and can receive and execute commands sent by the processor. In addition, touch sensitive surfaces may be implemented using various types of resistive, capacitive, infrared, and surface acoustic waves. The input unit may comprise other input devices than a touch sensitive surface. In particular, other input devices may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.

The display unit may be used to display information input by or provided to the user and various graphical user interfaces of the in-vehicle hand-held terminal, which may be composed of graphics, text, icons, video, and any combination thereof. The display unit may include a display panel, and the display panel may be configured, optionally, in the form of a Liquid Crystal Display (LCD), an Organic Light Emitting Diode (OLED), or the like. Further, the touch-sensitive surface may overlie the display panel, and when a touch operation is detected on or near the touch-sensitive surface, the touch operation is transmitted to the processor to determine the type of touch event, and the processor then provides a corresponding visual output on the display panel in accordance with the type of touch event. Although in the present embodiment the touch sensitive surface and the display panel are implemented as two separate components for input and output functions, in some embodiments the touch sensitive surface may be integrated with the display panel for input and output functions.

The vehicle hand-held terminal may also include at least one sensor, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor that adjusts brightness of the display panel according to brightness of ambient light, and a proximity sensor that turns off the display panel and/or backlight when the in-vehicle handheld terminal is moved to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when the mobile phone is stationary, and can be used for applications of recognizing the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer and an infrared sensor which can be configured on the vehicle-mounted handheld terminal are omitted for further description.

The audio circuit, the speaker, the microphone can provide the audio interface between user and the car handheld terminal. The audio circuit can transmit the electric signal converted from the received audio data to the loudspeaker, and the electric signal is converted into a sound signal by the loudspeaker to be output; on the other hand, the microphone converts the collected sound signal into an electric signal, the electric signal is received by the audio circuit and then converted into audio data, and the audio data is processed by the audio data output processor and then sent to another vehicle-mounted handheld terminal through the RF circuit or output to the memory for further processing. The audio circuit may also include an earbud jack to provide communication of a peripheral headset with the vehicle hand-held terminal.

WiFi belongs to short distance wireless transmission technology, and vehicle-mounted handheld terminal can help the user to receive and dispatch e-mail, browse the webpage and visit streaming media etc. through the WiFi module, and it provides wireless broadband internet access for the user. Although fig. 5 shows a WiFi module, it is understood that it does not belong to the essential constitution of the in-vehicle hand-held terminal, and may be omitted entirely as needed within the scope not changing the essence of the invention.

The processor is a control center of the vehicle-mounted handheld terminal, is connected with each part of the whole mobile phone by various interfaces and lines, and executes various functions and processing data of the vehicle-mounted handheld terminal by running or executing software programs and/or modules stored in the memory and calling data stored in the memory, thereby carrying out the integral monitoring on the mobile phone. Optionally, the processor may include one or more processing cores; preferably, the processor may integrate an application processor, which mainly handles operations of storage media, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor.

The vehicle-mounted handheld terminal also comprises a power supply (such as a battery) for supplying power to each component, and the power supply can be logically connected with the processor through the power management storage medium, so that the functions of managing charging, discharging, power consumption management and the like can be realized through the power management storage medium. The power supply may also include any component of one or more dc or ac power sources, rechargeable storage media, power failure detection circuitry, power converters or inverters, power status indicators, and the like.

Although not shown, the vehicle-mounted handheld terminal may further include a camera, a bluetooth module, and the like, which are not described herein again. Specifically, in this embodiment, the processor in the vehicle-mounted handheld terminal loads the executable file corresponding to the process of one or more application programs into the memory according to the following instructions, and the processor runs the application programs stored in the memory, thereby implementing various functions.

Example III,

As shown in fig. 11, the present invention further provides a road weather detection method, which is applied to the road weather detection system, and comprises the following steps:

s101, the vehicle-mounted road weather detection device collects road weather information;

as shown in fig. 10, the vehicle-mounted road weather detection device collects weather information, and includes the following steps:

starting an optical window pollution detection and automatic correction program, and outputting a pollution alarm if the optical window pollution is detected and the automatic correction fails; if the optical window is not polluted, the next step is carried out;

starting three frequency modulation lasers to emit simultaneously;

starting a multi-channel module and simultaneously collecting three paths of laser signals, road surface infrared radiation signals and temperature and humidity signals after frequency-selective filtering, amplification and rectification;

starting an infrared three-wavelength pavement analysis program to calculate pavement temperature, pavement state, covering thickness, wet-skid coefficient, air temperature and humidity, dew point and frost point;

outputting the road meteorological information in real time, wherein the road meteorological information comprises: dry pavement, moisture, accumulated water, ice-water mixture, icing, accumulated snow, thickness of a covering, wet-skid coefficient, pavement temperature, air temperature and humidity, dew point, frost point, longitude and latitude, altitude and position information.

S102, the terminal receives the road meteorological information;

s103, the client receives the real-time measurement data, collects and stores videos and images of road conditions, analyzes and processes the measurement data and the images, and forms early warning of real-time and future development trends of the road meteorological information;

s104, remotely transmitting data, videos and images through communication network signals, and storing the data, the videos and the images in a background server or a cloud server;

and S105, the back-end server or the cloud server performs big data analysis on the real-time data of the multiple sets of vehicle-mounted road meteorological monitoring equipment and then pushes the data to an information demand unit or an individual.

In the vehicle-mounted road weather detection device and method, real-time monitoring client software in an intelligent mobile phone APP and a PC computer is a unit for further integrating and analyzing road weather data. As shown in fig. 11, which is a working flow diagram of the vehicle-mounted weather system of the present invention, the real-time monitoring client software in the smart phone APP and the PC can simultaneously perform video and image acquisition and storage of road conditions and analysis processing on the measurement data and images, besides receiving real-time measurement data of the weather detection unit at a high speed, to form real-time and future development trend early warning and the like on road weather information, and the data, the video and the images can be remotely transmitted through 4G/5G network signals to store a background server or a cloud server. The back-end server or the cloud server can analyze the big data of the real-time data of the vehicle-mounted road meteorological monitoring devices and then push the big data to relevant information demand units or individuals, so that the intelligent traffic monitoring system is beneficial to meeting the demands of intelligent traffic management and traffic participants on road meteorological data and warning, and the development of current intelligent traffic and automatic driving technology is promoted.

The road weather detection method optimizes the detection method, the measurement working principle, the pollution resistance and the splash prevention capacity and the shock resistance of the traditional traffic weather road sensor, improves the data acquisition and transmission speed, expands the wireless transmission mode, supports the aspects of Bluetooth/4G/5G transmission, reduces the power consumption, adapts to a vehicle-mounted power supply and the like, can monitor parameters such as dry road surface, humidity, water accumulation, ice-water mixture, ice, snow, cover thickness, wet slip coefficient and the like in real time, can realize high-speed detection, improves the update frequency of the road surface state from the original 30 seconds or minutes to the frequency of 40 times in one second, has the road surface data acquisition distance resolution ratio of less than 1 meter, and adapts to the rapid measurement of traffic weather factors such as the road surface state, the road surface temperature, the air temperature, the humidity, the dew point, the frost point and the like and the longitude and the latitude and longitude and latitude information when, Storage, sharing and early warning. The real-time traffic meteorological data with high resolution of all road sections are provided for vehicle and road operation management departments, the requirements of traffic management and participants on the real-time traffic meteorological data and warning are favorably met, and the development of the current intelligent traffic and automatic driving technology is promoted.

Example four,

In an embodiment of the present invention, a storage medium containing computer-executable instructions for performing the method of the foregoing embodiment when executed by a computer processor is provided.

The computer-readable storage medium optimizes the detection method, the measurement working principle, the pollution resistance and the splash prevention capacity and the shock resistance of the traditional traffic meteorological road surface sensor, improves the data acquisition transmission speed, expands the wireless transmission mode, supports the aspects of Bluetooth/4G/5G transmission, reduces the power consumption, adapts to a vehicle-mounted power supply and the like, can monitor parameters such as dry road surfaces, dampness, water accumulation, ice-water mixture, ice, snow, the thickness of a covering object, wet slip coefficient and the like in real time, can realize high-speed detection at the same time, improves the updating frequency of the road surface state from the original 30 seconds or minutes to the frequency of 40 times in one second, has the road surface data acquisition distance resolution ratio of less than 1 meter, and adapts to the rapid measurement of the road surface state, the road surface temperature, the air temperature, the humidity, the dew point, the frost point and other traffic meteorological factors and the longitude and latitude and longitude, Storage, sharing and early warning. The real-time traffic meteorological data with high resolution of all road sections are provided for vehicle and road operation management departments, the requirements of traffic management and participants on the real-time traffic meteorological data and warning are favorably met, and the development of the current intelligent traffic and automatic driving technology is promoted.

Computer storage media for embodiments of the invention may employ any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).

The invention is not limited to the embodiments discussed above. The foregoing description of the specific embodiments is intended to describe and explain the principles of the invention. Obvious modifications or alterations based on the teachings of the present invention should also be considered as falling within the scope of the present invention. The foregoing detailed description is provided to disclose the best mode of practicing the invention, and also to enable a person skilled in the art to utilize the invention in various embodiments and with various alternatives for carrying out the invention.

Claims (10)

1. The utility model provides an on-vehicle road meteorological detection device which characterized in that installs on the motor vehicle automobile body, and it includes:

a housing;

the road surface meteorological sensor is used for detecting road surface meteorological information in real time;

and the processing unit is connected with the road surface meteorological sensor and is used for processing the road surface meteorological information.

2. The on-vehicle road weather detection device according to claim 1, wherein the road weather sensor includes:

the infrared laser emission module emits infrared laser to a road surface;

a receiving part that receives infrared laser light reflected from a road surface for detecting a road surface state and cover information;

the air temperature and humidity detection unit is used for detecting the temperature and humidity of the air on the road surface;

and the road surface temperature detection unit is used for detecting the road surface temperature.

3. The vehicular road weather detection apparatus according to claim 2,

the device also comprises a detection area laser indicator;

the infrared laser emission module includes:

the device comprises a first infrared laser emission module, a second infrared laser emission module and a control module, wherein the working wavelength range of the first infrared laser emission module is 1290-1350 nanometers;

the working wavelength range of the second infrared laser emission module is 1460-1520 nanometers;

the working wavelength range of the third infrared laser emission module is 1640-1700 nanometers;

the first infrared laser emitting module, the second infrared laser emitting module, the third infrared laser emitting module, the road surface temperature detecting unit, the air temperature and humidity detecting unit, the detection area laser indicator and the receiving component are distributed on the same detection end face;

the first infrared laser emitting module, the second infrared laser emitting module, the third infrared laser emitting module, the road surface temperature detecting unit, the air temperature and humidity detecting unit and the laser indicator are distributed around the receiving component, and the receiving component is positioned in the middle.

4. The vehicular road weather detection apparatus according to claim 3,

the first infrared laser emission module, the second infrared laser emission module and the third infrared laser emission module adopt different modulation frequencies and emit simultaneously;

after the receiving component receives the signals, the signals are processed by a high-precision low-noise discharge circuit, and then the signals simultaneously enter three high-Q value band-pass frequency-selective filter circuits with different central frequencies, wherein the central frequencies correspond to the previous driving modulation frequencies;

the signals after frequency selection, filtering and amplification enter a multi-channel high-speed analog-digital acquisition unit, and the road surface state is measured in real time after analog-digital acquisition and calculation.

5. The vehicular road weather detection apparatus according to claim 1, wherein the housing includes:

an outer shield and an inner shield;

the outer protective cover and the inner protective cover jointly form a double-layer ventilation structure protective cover;

the outer shield has a grid-shaped air guide hole.

6. The vehicular road weather detection apparatus according to claim 1,

the shell is arranged on the fixed bracket;

the height of the pavement meteorological sensor from the ground is 20-120 cm;

the fixed bracket is a stainless steel bracket;

the fixed angle included angle A of the fixed support ranges from 130 degrees to 155 degrees, and the corresponding horizontal included angle B of the measuring light beam and the road surface ranges from 40 degrees to 65 degrees;

the vehicle-mounted road weather detection device is mounted at the front end of the motor vehicle, and/or the side surface of the motor vehicle, and/or the rear end of the motor vehicle, and/or the bottom of the motor vehicle.

7. A road weather detection system, comprising:

-a number of on-board road weather detection devices as claimed in any one of claims 1-6;

the terminal is connected with the vehicle-mounted road weather detection device in a wired or wireless manner, and receives, processes and forwards the road weather information acquired by the vehicle-mounted road weather detection device;

the server side is in wireless connection with the terminal, and receives and processes the road meteorological information forwarded by the terminal;

and the client is in wireless connection with the terminal and receives and processes the road meteorological information forwarded by the terminal.

8. A road weather detection method applied to the road weather detection system according to claim 7, comprising the steps of:

the vehicle-mounted road weather detection device collects road weather information in real time;

the terminal receives road meteorological information acquired by the vehicle-mounted road meteorological detection device and processes and forwards the road meteorological information;

the terminal remotely transmits the road meteorological data, the video and the image information to a background server or a cloud server through a communication network;

and the back-end server or the cloud server performs big data analysis on the multiple groups of road meteorological data, videos and image real-time information and then pushes the information to information demand units or individuals.

9. The road weather detection method according to claim 8,

the terminal sends the road meteorological information to a client, and the client comprises mobile equipment and/or a computer;

the client further integrates and analyzes the road meteorological data, collects and stores videos and images of road conditions, analyzes and processes the measured data and images, and forms early warning of real-time and future development trends of the road meteorological information;

the vehicle-mounted road weather detection device collects weather information and comprises the following steps:

starting optical window pollution detection and automatic correction;

starting three frequency modulation lasers to emit simultaneously;

starting a multi-channel module and simultaneously collecting three paths of laser signals, road surface infrared radiation signals and temperature and humidity signals after frequency-selective filtering, amplification and rectification;

starting an infrared three-wavelength pavement analysis program to calculate pavement temperature, pavement state, covering thickness, wet-skid coefficient, air temperature and humidity, dew point and frost point;

outputting the road meteorological information in real time, wherein the road meteorological information comprises: dry pavement, moisture, accumulated water, ice-water mixture, icing, accumulated snow, thickness of a covering, wet-skid coefficient, pavement temperature, air temperature and humidity, dew point, frost point, longitude and latitude, altitude and position information.

10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method of claim 9.

Images