JP2003166223A - Method for snow removal and chemical-sprinkling assist and its system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for snow removal and chemical-sprinkling assist and its system capable of efficiently carrying out road management works such as snow removal and chemical by sprinkling accurately and easily grasping a longitudinal road surface temperature distribution. <P>SOLUTION: The underground temperature under a road 2 is measured by an optical fiber cable 3 embedded in the longitudinal direction of the road 2. From the longitudinal road 2 face temperature obtained by use of the underground temperature under the road 2 and the underground thermal constant such as the thermal conductivity, thermal capacity, etc., under the road and information of meteorological sensors 4 comprising thermometers, rain gauge and snow gauge set at a plurality of positions, the start time, stop time, execution place of snow removal and chemical-sprinkling are estimated, and the information is provided to the road manager to assist the manager. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snow removal / chemical spraying support method and system for preventing road surface freezing, and more particularly, to accurately estimate a road surface temperature distribution by using an optical fiber embedded in a road, The present invention relates to a snow removal / chemical spraying support method and system for improving the efficiency of road management work.

[0002]

2. Description of the Related Art Since the freezing of the road surface seriously affects road traffic, it is important for the road administrator to accurately grasp the situation, remove snow, spray chemicals, or provide information to road users. Has become a problem.

In the conventional snow removal / medicine spraying support method, the knowledge of road surface freezing is grasped by a skilled operator by utilizing information of a spot type road surface sensor such as a road patrol and infrared thermometer. For example, in the case of chemical spraying, when the temperature is −2 ° C. or lower and the road surface is wet,
The drug is sprayed uniformly. In addition, snow removal is carried out based on information obtained from road patrols.

[0004]

However, in the conventional snow removal / chemical spraying support method, since information such as road inspection and spot type road surface sensor information is used, a freezing situation that greatly differs depending on the road structure and surrounding conditions can be considered. There is a problem that it is difficult to understand the road surface temperature distribution in the length direction of the road, which is important for understanding.

Further, since the road surface condition in the lengthwise direction of the road, particularly the freezing condition cannot be grasped, the same amount of the medicine must be uniformly sprayed over the entire length of the road, leading to an increase in management cost. There is also.

[0006] Furthermore, snow removal is largely based on judgment from visual information such as road inspection, and there is a problem that snow removal work cannot be efficiently performed in real time in real time.

Therefore, an object of the present invention is to provide a snow removal and chemical spraying support method and system for accurately and easily grasping the road surface temperature distribution in the lengthwise direction of the road and efficiently performing road management work such as snow removal and chemical spraying. To provide.

[0008]

The present invention was devised to achieve the above object, and the invention of claim 1 is
The temperature under the road is measured with an optical fiber embedded in the length direction of the road, and the longitudinal direction of the road is obtained by using the underground temperature under the road and the underground thermal constants such as thermal conductivity and heat capacity under the road. The start time, stop time, and place of snow removal and chemical spraying are determined from the road surface temperature of the road and the information of weather sensors installed at multiple locations such as thermometers and snowfall gauges. It is a snow removal / chemical spraying support method that provides road protection and supports road managers.

According to a second aspect of the present invention, from the information of the road surface temperature in the length direction of the road, the air temperature, the amount of rainfall and snow, the road surface temperature change rate per predetermined time and the temperature change rate, the effective time of the drug application and the start of the drug application are started. 2. The snow removal / medical spraying support method according to claim 1, wherein the time and the stop time, the necessary / unnecessary place for the chemical spraying, the snow removal time, and the snow removal implementing place are determined and the information is provided to the road administrator.

According to a third aspect of the present invention, an optical fiber buried in a road, a device for measuring the temperature of the optical fiber, a road surface temperature estimating device for estimating the road surface temperature in the length direction of the road, and a representative point are installed. Meteorological sensors such as thermometers and rainfall / snow gauges, meteorological processing devices that process the information from the meteorological sensors, and information on road surface temperature estimation devices and meteorological processing devices. Comprehensive determination device for determining snow, a transmission device for transmitting information of the comprehensive determination device to a road management office and work vehicles, and a snow removal and chemical spraying support provided for a display device provided in the road management office and work vehicles System.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic view of a snow removal / chemical spraying support system which is a preferred embodiment of the present invention.

As shown in FIG. 1, a snow removal / chemical spraying support system 1 according to the present invention is for supporting a road administrator who performs road management work such as snow removal / chemical spraying for preventing road surface freezing. Is.

The system 1 includes an optical fiber 3 buried along the length of a road 2, a meteorological sensor 4 including a thermometer and a snowfall gauge installed at a representative point near the road 2. Observation station 5 that processes information from the optical fiber 3 and the weather sensor 4 and generates support information for snow removal and chemical spraying.
And the road management office 6 where the observation station 5 provides support information for snow removal and chemical spraying, and the observation station building 5 provides support information for snow removal and chemical spraying, and snow removal and chemical spraying at the freezing danger point X The work vehicle 7 for performing the above is constructed as a whole.

The meteorological sensor 4 and the observation station 5 are connected by a communication optical fiber 9 via a sensor transmission device 8. In FIG. 1, the weather sensor 4 is illustrated as an example installed at a representative point near the road 2, but a plurality of weather sensors 4 may be installed at a plurality of locations near the road 2.

In the observation station building 5, an optical fiber temperature measuring device 10 connected to the optical fiber 3 for measuring the temperature (underground temperature) of the optical fiber 3 and a road surface temperature are estimated from the measured underground temperature. Road surface temperature estimation device 11, first transmission device 12 connected to communication optical fiber 9, and first transmission device 1
From the information of the weather processing device 13 that processes the information of the weather sensor 4 transmitted from the device 2, the information of the optical fiber temperature measuring device 10 and the weather processing device 13, the execution time of snow removal and chemical spraying,
A comprehensive determination device 14 that determines the implementation location and the like, and a second transmission device 15 that transmits information from the comprehensive determination device 14 to the road management office 6 and the work vehicle 7 are provided.

The optical fiber temperature measuring device 10 is, for example,
The optical fiber 3 itself is used as a sensor,
The expansion / contraction of the optical fiber 3 is detected to measure the temperature distribution in the longitudinal direction of the fiber. With this device 10, it is possible to accurately and easily obtain the underground temperature distribution in the longitudinal direction under the road 2. The device 10 is a road surface temperature estimation device 11
Then, the underground temperature signal a having the information of the underground temperature distribution in the longitudinal direction under the road 2 is output.

The road surface temperature estimating device 11 estimates the road surface temperature distribution in the longitudinal direction of the road 2 by using the underground temperature under the road 2 and the underground thermal constants such as the thermal conductivity and the heat capacity under the road 2. The road surface temperature change rate (road surface temperature change amount) in the length direction of the road 2 per predetermined time is calculated. This device 1
1, the road surface temperature distribution in the length direction of the road 2 and the road surface temperature change rate can be accurately and easily obtained. Device 11
Outputs to the comprehensive determination device 14 a road surface temperature signal b having information on the road surface temperature distribution in the length direction of the road 2 and the road surface temperature change rate.

The meteorological processing device 13 has the first information from the meteorological sensor 4 having the information on the temperature and the amount of snowfall at each time.
The transmission output signal c is time-managed and the temperature change rate (temperature change amount) per predetermined time is calculated. The device 13 outputs to the comprehensive determination device 14 a meteorological processing signal d having information on the temperature change over time, the snowfall change over time, and the temperature change rate. In this device 13, a plurality of weather sensors 4
When the vehicle is installed at a plurality of locations in the vicinity of the road 2, a weather processing signal d having information on the temperature change in the length direction of the road 2, the snowfall change, and the temperature change rate is output.

Based on the road surface temperature signal b and the meteorological processing signal d, the comprehensive judgment device 14 determines the effective time of the chemical spraying, the start time and the stop time of the chemical spray, the necessary and unnecessary points of the chemical spray, the snow removal time, and the snow removal. The implementation point is determined, and the determination signal e including these pieces of information is output to the second transmission device 15. When the determination signal e is input to the second transmission device 15,
The second transmission output signals f1 and f2 are transmitted to the road management office 6 and the work vehicle 7, respectively.

The road management office 6 is provided with an office transmission device 16 and an office display device 17, and a road manager is resident there. Upon receiving the second transmission output signal f1, the transmission device 16 outputs the office transmission output signal g to the display device 17. When the transmission output signal g is input, the display device 17 receives the effect time of the drug application, the start time and the stop time of the drug application, the necessary and unnecessary parts of the drug application,
Displays the snow removal time and snow removal location.

The road manager can accurately grasp the road surface condition of the road 2 based on these displays.
It is possible to issue work instructions to the work vehicle (other than the work vehicle 7) such as where snow removal is required and where chemicals need to be sprayed, by existing radio or the like. In addition, for example, the road administrator displays information about the road surface condition of the road 2 on an electronic bulletin board installed on the road 2 or indicates that the work vehicle is working or a road is closed, thereby You can also call your driver's attention.

The work vehicle 7 is provided with a vehicle transmission device 18 and a vehicle display device 19, and a driver who is working or waiting for snow removal and chemical spraying is on the vehicle. When receiving the second transmission output signal f2, the transmission device 18 outputs the vehicular transmission output signal h to the display device 19. Display device 19
When the transmission output signal h is input, displays the effective time of the chemical spraying, the start time and the stop time of the chemical spray, the necessary and unnecessary locations for the chemical spray, the snow removal time, and the snow removal location. From the current position of the work vehicle 7, the driver of the work vehicle 7 knows the snow removal location, the chemical application location, etc., and can immediately start the snow removal and the chemical application.

Further, the vehicle transmission device 18 of the work vehicle 7
On the contrary, the drug spraying contact signal i having the information on the time when the drug is actually sprayed is transmitted to the second transmission device 15 of the observation station 5. Upon receiving the drug spraying contact signal i, the second transmission device 15 outputs the second transmission output signal f3 to the comprehensive determination device 14. Based on three signals obtained by adding the fed back medicine spraying contact signal i to the road surface temperature signal b and the weather processing signal d, the comprehensive judgment device 14 more accurately effects the time of spraying the medicine, the start time of the medicine spraying, and the suspension. The time, necessary / unnecessary locations for chemical spraying, snow removal time, and snow removal location are determined. As a result, in the system 1 according to the present invention, the effect duration of the drug during drug spraying,
It is possible to judge the increase / decrease of drug spraying.

Next, a method for supporting chemical spraying will be described.

First, the temperature of the optical fiber 3 buried under the road 2 is measured by the optical fiber temperature measuring device 10, and from the temperature of the optical fiber 3, the road surface temperature estimating device 11 measures the road surface temperature distribution in the longitudinal direction of the road 2. And the road surface temperature change rate in the length direction of the road 2 per predetermined time is calculated.
Information on the estimated road surface temperature distribution and the calculated road surface temperature change rate is sent to the comprehensive determination device 14.

On the other hand, information such as the temperature and the amount of snowfall measured by the weather sensor 4 is transmitted through the communication optical fiber 9, the sensor transmission device 8 and the first transmission device 12 to the weather processing device 13
Sent by the weather processing device 13,
The change in the amount of snowfall over time is calculated, and the rate of change in temperature per predetermined time is calculated. Information on the obtained temperature change over time, the amount of snowfall over time, and the calculated temperature change rate is sent to the comprehensive determination device 14.

A method of determining the time and place of drug spraying by the comprehensive judging device 14 will be described with reference to the flowchart of FIG.

As shown in FIG. 2, first, the comprehensive judging device checks the road surface temperature distribution in the longitudinal (length) direction of the road (F2
1) From the road surface temperature distribution, it is determined whether or not the temperature is 0 ° C. or lower (S22). If there is no section where the road surface temperature is 0 ° C. or less (No), it is determined that there is no freezing danger section (F23).

As described with reference to FIG. 1, the information is transmitted from the second transmission device 15 of the observation station building 5, received by the office transmission device 16 of the road management office 6, and received by the office display device. The transmission device 1 for a vehicle of the work vehicle 7
It is received at 8 and displayed on the vehicle display device 19.

When there is a section where the road surface temperature is 0 ° C. or less (Ye
In s), first, it is determined that there is a temperature decrease section, and the information is displayed on the office and vehicle display devices (F2
4). Then, the amount of snowfall is checked (F25), and the presence / absence of the amount of snowfall is determined (S26).

The presence / absence of the amount of snowfall is determined by the present amount of snowfall h.
n (mm / min) only, or the current amount of snowfall hn (mm / min), 1 within the past hour from the present
The amount of rainfall snowfall per minute hp (mm / min) and its duration hp_time (min) are used. For example, if the current snowfall amount hn is 0.02 mm / min or more, it is determined that there is rainfall snowfall. Further, even if the current rainfall snow amount hn is 0 mm / min, hp = 0.01 mm / min and the duration h thereof is h.
If p_time is 10 minutes or more, it is determined that there is rainfall and snowfall. However, these hn, hp, hp_time
Can be set arbitrarily. The determination as to the presence or absence of the amount of rainfall and snowfall in the present embodiment is made based on the above-mentioned numerical values. When it is determined that there is no rainfall snowfall, the process returns to F24.

When it is determined that the amount of rainfall and snowfall is present, it is determined that there is a freezing danger, and the freezing danger section is displayed on the office and vehicle display devices (F27). When it is determined that there is a danger of freezing, it is determined that it is necessary to start spraying the drug at the same time, and the spraying section is displayed on the office and vehicle display devices (F2).
8).

As a result, the road management office issues a work instruction to the work vehicle, which does not have the transmission device and the display device of the system according to the present invention, where and where the drug needs to be sprayed, by existing radio or the like. be able to. Further, in the work vehicle equipped with the transmission device and the display device of the system according to the present invention, it is possible to immediately know the drug application point from the current position and start the application.

Here, an example of data in the case where it is necessary to start drug spraying (danger of freezing) will be described.

FIG. 3 shows an example of changes over time in the road surface temperature distribution (when the temperature is decreasing) estimated by the road surface temperature estimating device 11 described with reference to FIG.

As shown in FIG. 3, after 16:00, the temperature started to decrease over the entire section of the road longitudinal (length) direction distance of 0 to 350 m, and the road longitudinal direction distance was about 30 at 17:00. The road surface temperature is 0 ° C. or lower from ˜170 m. As described above, the comprehensive determination device determines that there is a temperature decrease section at this point. After that, it is determined whether or not there is snowfall.

FIGS. 4 (a) and 4 (b) respectively show an example of changes with time of the amount of rainfall and snow and the temperature obtained from the meteorological processing device 13 described in FIG. 3 and 4
(A) and (b) are data of the same day. FIG. 4 (a),
In (b), the horizontal axis represents time.

As shown in FIGS. 4 (a) and 4 (b), the comprehensive judging device has an amount of snowfall of 0.02 mm at 17:00.
/ Min or more, so it is determined that there is rainfall and snowfall. Taking this case as an example, the comprehensive determination device first receives information from the road surface temperature estimation device for determining that there is a road surface temperature decrease section from 17:00, and the meteorological processing device indicates that there is rainfall and snowfall. Information for judgment is entered. From the above information, the comprehensive determination device determines that the road longitudinal direction distance is about 30 m to 170 m.
Since the road surface temperature is 0 ° C or less over m, and the road surface is wet due to rainfall and snow, it is determined that there is a danger of freezing and the start of chemical spraying over the road longitudinal direction distance of about 30 m to 170 m, and that information Is displayed on office and vehicle displays.

Next, a method of assisting during drug spraying (medicine spray saving) judged by the comprehensive judging device 14 will be described with reference to the flowchart of FIG. The determination during the chemical spraying is premised on that there is a section where the road surface temperature is 0 ° C. or lower.

As shown in FIG. 5, first, the comprehensive determination device checks the amount of rainfall and snow (F51) and determines the presence or absence of the amount of rainfall and snow (S52). If it is determined that there is no rainfall, F5
Return to 1. When it is determined that the amount of rainfall and snowfall is present, the road surface temperature change amount (the road surface temperature change amount per hour) at each point in the road longitudinal direction obtained from the road surface temperature estimation device is examined (F
53), together with the road surface temperature change amount (change amount of the road surface temperature per hour) at each point in the longitudinal direction of the road obtained from the weather processing device (F54), the road surface temperature change amount and the air temperature change amount are compared. Yes (S55).

When the amount of change in air temperature is larger than the amount of change in road surface temperature by, for example, 2 ° C./1 hour or more (Yes), the comprehensive determination device determines that the chemical spraying effect is continuing, and the information is displayed for the office and the vehicle. Displayed on the device (F56). Also,
When the road surface temperature change amount and the air temperature change amount are almost the same (2 ° C./less than 1 hour) (No), the comprehensive determination device determines that the chemical spraying is sufficient, and the information is displayed on the office and vehicle display devices. (F57).

From the experimental results obtained so far, when the threshold value for distinguishing whether the drug spraying effect is continuing or the drug spraying is sufficient is set to 2 ° C./hour, the classification is performed with a probability of about 80%. Therefore, the threshold value is set to 2 in this embodiment.
C./hour was set. However, this threshold can be arbitrarily set and changed.

As described above, the information on the duration of the chemical spraying effect and the information on the sufficient spraying of the chemicals are provided to the road manager of the road management office and the driver of the work vehicle and utilized as the support information for the chemical spraying work.

Here, an example of the data during the drug spraying is shown in FIG.
It shows in (a)-(e). 6A to 6E, the horizontal axis represents time.

FIG. 6A is a diagram showing the actually observed road surface condition. FIG. 6B is a diagram showing the time at which the drug is actually sprayed. FIG.6 (c) is a figure which shows an example of the time-dependent change of the amount of rainfall snows. FIG.6 (d) is a figure which shows an example of the time-dependent change of the road surface temperature change and air temperature change of 300m point per hour. FIG.6 (e) is a figure which shows an example of the time-dependent change of the road surface temperature and air temperature change of a 300-m point.

The road surface temperature change curve 61d in FIG. 6 (d) and the road surface temperature curve 61e in FIG. 6 (e) are obtained from the road surface temperature estimation device 11 described in FIG. FIG. 6 (b) shows a rainfall / snow amount curve 60c, FIG. 6 (d) shows a temperature change curve 62d, and FIG.
The temperature curve 62e of (e) is obtained from the weather processing device 13 described in FIG.

Generally, when ice components are present on the road surface,
When chemicals (mainly consisting of salt) are sprayed, the road surface temperature drops sharply compared to changes in air temperature. As the amount of chemicals increases, the amount of water increases, and the tendency for the road surface temperature to decrease decreases. The comprehensive determination device utilizes this phenomenon to
Determine whether the application amount is increased, the amount is saved, or the effect is maintained.
As shown in FIG. 6D, the time zones of A and B (17 to 1)
8:00, 19:00 to 19:00), when comparing the temperature change curve 62d and the road surface temperature change curve 61d, compared to the temperature change amount,
Since the road surface temperature change amount is large, it can be estimated that the drug is being sprayed by the comprehensive determination device, and it can be determined that the effect of the drug is continuing. When the temperature change curve 62d and the road surface temperature change curve 61d are compared with each other in the time zone of C (19 to 21:00), the road surface temperature change amount is still larger than the air temperature change amount. It is presumed that the drug is effective, and it can be judged that the drug is continuing the effect. The reason for this is shown in FIG.
As shown in the road surface temperature curve 61e of (d) and the road surface state of FIG. 6 (a), although the road surface temperature is 0 ° C. or lower,
This is because the road surface was actually wet. The same phenomenon was confirmed in the experimental results.

In the time zone of D (21 to 7 o'clock), the temperature change amount and the road surface temperature change amount are almost the same, and the comprehensive determination device shows that the medicine is sufficiently effective (the water content increases as the medicine increases. It can be estimated that the temperature decrease will be small), and it can be determined that the drug application may be saved. The reason for this is shown in FIG.
As shown in the road surface temperature curve 61e of (d) and the road surface state of FIG. 6 (a), although the road surface temperature is 0 ° C. or lower,
This is because the road surface was actually wet for a long time. The same phenomenon was confirmed in the experiment.

In the system 1 according to the present invention, as described with reference to FIG. 1, the work vehicle 7 is actually sprayed with the drug by the vehicle transmission device 18 to the second transmission device 15 of the observation station 5. The chemical spray contact signal i having the information of the time of the selected time is transmitted, and the graph of the chemical spray record as shown in FIG. 6B is obtained.
It is possible to judge the effect duration during drug application and increase / decrease of drug application.

Next, a snow removal assisting method to be judged by the comprehensive judging device will be described with reference to the flowchart of FIG. The determination of snow removal also assumes that there is a section where the road surface temperature is 0 ° C or lower.

As shown in FIG. 5, first, the comprehensive determination device checks the amount of rainfall (F51) and determines the presence or absence of the amount of rainfall (S52). If it is determined that there is no rainfall, F5
Return to 1.

If it is determined that there is snowfall, the temperature is 2 ° C.
It is determined whether or not it is below (S61).
When the temperature is not lower than 2 ° C. (No), the same procedure (F52 to F55) as the support method during the drug spraying is performed.
When the temperature is 2 ° C. or lower (Yes), it is determined that the snowfall occurs, and it is determined whether or not the snowfall amount is 2 cm or more (S62). When the amount of snowfall is not 2 cm or more (No), the same procedure (F52 to F57) as the support method during chemical spraying is performed. When the amount of snowfall is 2 cm or more (Yes), the road surface temperature is near 0 ° C (0 ° C ± Δ
T) and whether the road surface temperature change is constant (continuous for Δt time) is determined (F63). ΔT and Δt can be set arbitrarily. In this embodiment, ΔT = 1 ° C.,
Δt = 30 minutes. When the road surface temperature is around 0 ° C. and the road surface temperature change is constant, it is determined that the snow is covered (F64), and it is determined that the snow removal is necessary, and the information is displayed on the office and vehicle display devices (F65).

As described above, the information required to remove snow is provided to the road manager of the road management office and the driver of the work vehicle, and is utilized as support information for snow removal work.

Here, an example of the data of the snow removal support method is shown in FIGS. In FIGS. 7A to 7E, the horizontal axis represents time. The data shown in FIGS. 7A to 7E are obtained in substantially the same manner as the data shown in FIGS. 6A to 6E.

The road surface temperature change curve 71d of FIG. 7 (d) and the road surface temperature curve 71e of FIG. 7 (e) are obtained from the road surface temperature estimation device 11 described with reference to FIG. The rainfall / snow amount curve 70c in FIG. 7 (b), the temperature change curve 72d in FIG. 7 (d), and FIG.
The temperature curve 72e of (e) is obtained from the weather processing device 13 described in FIG.

The road surface temperature curve 71e of FIG.
Looking at the road surface temperature change curve 71d in (d), the road surface temperature remains constant at almost 0 ° C. (ΔT = 1 ° C. in the present embodiment), and the road surface temperature change amount shows a value close to 0. Therefore, the comprehensive determination device can determine that the road surface is covered with snow. The reason for this is that when the road surface is covered with snow, water and ice components are mixed and the road surface temperature becomes 0 ° C. At this time,
The actually observed road surface condition is a snowy condition, as shown in FIG.

In the system 1 according to the present invention, as described with reference to FIG. 1, the work vehicle 7 is actually sprayed with the drug by the vehicle transmission device 18 to the second transmission device 15 of the observation station 5. The chemical spray contact signal i having the information on the time of the spray is transmitted, and a graph of the chemical spray record as shown in FIG. 7B is obtained.
It is possible to judge the effect duration during drug application and increase / decrease of drug application.

Even though the drug is sprayed, the road surface temperature change amount is close to 0 and the road surface temperature is constant at 0 ° C ± 1 ° C. You can judge. At this time, the comprehensive determination device determines that the road surface is in a snowy state, and further determines that snow removal work is necessary based on the information that the amount of rainfall and snowfall is large. The information is displayed on office and vehicle displays.

As described above, the information required for snow removal is provided to the road manager of the road management office and the driver of the work vehicle, and is utilized as support information for snow removal work.

Next, another data example of the drug spraying support (drug spraying stop) method will be described with reference to FIGS. 8 and 9.

FIGS. 8 and 9 are views showing an example of changes over time in the road surface temperature distribution (when the temperature rises) estimated by the road surface temperature estimating device 11 described in FIG. 8 and 9 are examples of changes over time in the road surface temperature distribution on different days.

As shown in FIG. 8, after 9:00, the road longitudinal direction distance is about 30 to 50 m and 200 to 35.
It can be seen that the road surface temperature is 0 ° C or higher except at the point of 0 m. Therefore, the drug spraying in this case is about 30 to 5
It can be seen that it may be carried out between 0 m and 200 to 350 m.

As shown in FIG. 9, after 9:00, the road surface temperature is 0 at a point where the distance in the longitudinal direction of the road is about 200 to 350 m.
It is above ℃. Therefore, it can be understood that the chemical spraying in this case only needs to be performed when the distance in the longitudinal direction of the road is 0 to 200 m.

Further, the temperature rising points are partly different from the data in FIG. 8, and it can be seen that the points (sections) having the possibility of road surface freezing change depending on weather conditions and surrounding conditions. In such a situation, it is not necessary for the comprehensive determination device to spray the drug over the entire line, and the necessary location (road surface temperature 0
It is judged that the partial dispersion is required only in the section of (° C or less), and the information is displayed on the office and vehicle display devices.

As a result, the road management office issues a work instruction to the work vehicle, which does not have the transmission device and the display device of the system according to the present invention, to the work vehicle which does not require the spraying of chemicals by the existing radio or the like. be able to. Further, in the work vehicle equipped with the transmission device and the display device of the system according to the present invention, it is possible to immediately recognize the unnecessary position of the drug spraying from the current position and take immediate action.

As described above, according to the snow removal / chemical spraying support method and system according to the present invention, the road surface temperature is estimated from the underground temperature by using the optical fiber buried in the length direction of the road. Since the road surface temperature in the length direction can be grasped, the freezing condition in the road length direction can be known in real time. In particular, the feature is that the road surface temperature distribution in the road length direction can be accurately estimated without using meteorological data.

Further, the effective time of the chemical spraying, the chemical spraying start time, the chemical spraying stop time, the chemical spraying required portion, the unnecessary spot, the snow removal time, and the snow removal location are determined, and these information are stored in the road management office. Since it can be provided to persons and drivers of work vehicles, it is possible to improve the efficiency of chemical spraying such as spray saving, and to quickly respond to snow removal work.

Further, the road administrator displays information about the road surface condition on the electronic bulletin board installed on the road, and indicates that the work vehicle is working or a road is closed, thereby The driver can also be alerted.

[0070]

As is apparent from the above description,
According to the present invention, the following excellent effects are exhibited.

(1) Since the road surface temperature in the road length direction can be grasped, it is possible to know the freezing condition in the road length direction in real time.

(2) Effective time of chemical spraying, chemical spraying start time, chemical spraying stop time, chemical spraying required point, unnecessary point, snow removal time, snow removal point can be determined and the information can be provided to the road manager. It is possible to improve the efficiency of spraying chemicals, such as reducing the amount of spraying, and it is possible to quickly respond to snow removal work.

[Brief description of drawings]

FIG. 1 is a schematic view showing a preferred embodiment of the present invention.

FIG. 2 is a flowchart for determining the start of drug spraying (freezing risk).

FIG. 3 is a diagram showing an example of a temporal change in a road surface temperature distribution (when the temperature decreases).

FIG. 4 (a) is a diagram showing an example of a temporal change in the amount of rainfall and snowfall. FIG.4 (b) is a figure which shows an example of the time-dependent change of temperature.

FIG. 5 is a flowchart for determining spraying reduction / snow removal support during chemical spraying.

FIG. 6A is a diagram showing an actually observed road surface state. FIG. 6B is a diagram showing the time at which the drug is actually sprayed. FIG.6 (c) is a figure which shows an example of the time-dependent change of the amount of rainfall snows. Figure 6 (d) shows 1 at 300m
It is a figure which shows an example of the time-dependent change of the road surface temperature change and temperature change per hour. FIG.6 (e) is a figure which shows an example of the time-dependent change of the road surface temperature and air temperature change of a 300-m point.

FIG. 7A is a diagram showing an actually observed road surface state. FIG.7 (b) is a figure which shows the time when the medicine was actually sprayed. FIG.7 (c) is a figure which shows an example of the time-dependent change of the amount of rainfall snows. Figure 7 (d) shows 1 at 300m
It is a figure which shows an example of the time-dependent change of the road surface temperature change and temperature change per hour. FIG.7 (e) is a figure which shows an example of the time-dependent change of the road surface temperature and air temperature change of a 300-m point.

FIG. 8 is a diagram showing an example of changes over time in the road surface temperature distribution (when the temperature rises).

FIG. 9 is a diagram showing an example of a temporal change in a road surface temperature distribution (when the temperature rises).

[Explanation of symbols]

1 Snow removal and chemical spraying support system 2 roads 3 optical fiber 4 Weather sensor 5 Observation station 6 Road management office 7 work vehicle 10 Optical fiber temperature measuring device 11 Road surface temperature estimation device 13 Meteorological processor 14 Comprehensive judgment device X Freezing danger point

Claims (3)

[Claims] 1. The temperature under the road is measured by an optical fiber embedded in the length direction of the road, and the underground temperature under the road and the underground thermal constants such as thermal conductivity and heat capacity under the road are obtained. From the road surface temperature in the longitudinal direction of the road and the information of the meteorological sensor such as the thermometers installed at multiple locations and the amount of rainfall and snowfall,
A snow removal / chemical spraying support method characterized by determining a start time, a stop time, and a place of implementation of snow removal / chemical spraying and providing the information to a road administrator to support the road administrator. 2. From the information of the road surface temperature in the length direction of the road, the air temperature, the amount of snowfall, the road surface temperature change rate per predetermined time, and the temperature change rate, the effect time of the drug application, the start time and the stop time of the drug application, The snow removal / chemical spraying support method according to claim 1, wherein the necessary / unnecessary locations for spraying the chemicals, the snow removal time, and the snow removal location are determined and the information is provided to the road administrator. 3. An optical fiber buried in a road, a device for measuring the temperature of the optical fiber, a road surface temperature estimating device for estimating the road surface temperature in the length direction of the road, a thermometer installed at a representative point, and rainfall snow. Comprehensive judgment that determines the time and place of snow removal and chemical spraying from the weather sensor consisting of a meter and the like, the weather processing device that processes the information of the weather sensor, the information of the road surface temperature estimation device and the weather processing device Device, a transmission device for transmitting information of the comprehensive determination device to the road management office and the work vehicle, and a display device provided in the road management office and the work vehicle. system.