KR102348231B1 - Frozen road surface warning sign using thermochromic pigment, and installation method for the same - Google Patents

Abstract

Provided are a thermochromic type road surface freezing warning safety sign and an installation method thereof. The safety sign is applied with thermochromic paint, of which a color is changed according to temperature, to be colored as a text, a sign, or a symbolic picture when the temperature goes down below temperature criteria, and thus warns risk of freezing of a road surface to a road user or a pedestrian so as to prevent an accident. In addition, the safety sign informs the risk of freezing to the road user by considering topography of the road, geometric state, bridges, facilities, and road condition in a shade. The safety sign comprises a post, a safety sign plate, an auxiliary sign plate, a thermochromic paint colored character layer, and a thermochromic paint colored sheet.

Description

Temperature-sensitive road surface ice caution safety sign and its installation method

The present invention relates to a temperature-sensitive road surface icing caution safety sign, and more specifically, when the temperature falls below the critical temperature of the thermal material by applying a thermochromic paint that changes color according to the temperature, a letter It relates to a temperature-sensitive road surface ice caution safety sign and its installation method, which are colored with , signs, and symbol pictures to instruct road users or pedestrians about the risk of freezing on the road surface.

In general, as major causes of traffic accidents due to vehicle slippage occurring on the road surface of the road, there are freezing (freezing) and wet surface (wet surface). In particular, road icing is when moisture such as rainwater, snow, dew, and water vapor on or around the road surface changes to ice crystals when the outside air or road surface temperature drops below the freezing point. The lower the freezing point, the more likely the road surface icing will occur.

On the other hand, Figure 1 is a view showing a road surface icing caution safety sign according to the prior art.

As shown in a) and b) of Fig. 1, the safety sign for road ice caution according to the prior art generally indicates the risk of road ice using a paint or a reflective sheet with letters, symbols, symbol pictures, or combinations. . In addition, as shown in c) of FIG. 1 , there is a sign indicating the risk of road icing with a light source such as an LED by directly measuring the external temperature or the road surface temperature using an external power source or power supplied from a solar panel. However, since these safety signs are always installed, it is difficult to attract the driver's attention, and also, since they require constant attention regardless of the current road surface condition, they are not very helpful for safe driving.

According to the prior art, the danger of road icing is usually indicated with symbol pictures and characters of caution for road icing. In the case of safety signs made of commonly used paints or sheets, the danger is always indicated regardless of the outside temperature. This is because road users are overexposed to the icing safety signs even in spring, summer, and autumn, when it can be said that there is no risk of road surface icing. There was a risk that the pedestrian could not perceive it.

In addition, in the case of safety signs operated by an external power source or solar panel, a separate power supply, light source, and sensor are required, so installation is limited due to the high installation cost, and maintenance of power supply, LED, temperature sensor, etc. is needed In addition, there is a disadvantage that the risk of road surface icing cannot be indicated when an electrical or physical failure occurs.

Meanwhile, as a prior art, Korean Patent Publication No. 2015-81585 discloses an invention entitled "Paint composition for indicating the presence or absence of ice on the ground", which will be described with reference to FIG. 2 .

2 is a view schematically showing the principle of indicating the presence or absence of freezing through the coating composition according to the prior art.

Referring to FIG. 2 , the prior art paint composition for indicating the presence or absence of ice on the ground is a paint composition capable of indicating the presence or absence of ice on the ground as it changes color by sensing moisture and temperature of the ground, and 100 parts by weight of the paint With respect to, 10 to 30 parts by weight of a temperature sensing material that is discolored at a temperature of 0° C. or less; and 10 to 30 parts by weight of a moisture sensing material that is discolored by sensing moisture.

When the prior art coating composition for indicating the presence or absence of ice on the ground is applied to the lane of a motorway, as shown in a) and b) of FIG. 2, moisture and zero It is possible to sense a temperature of ℃ or less, and through this, a suboptimal discoloration phenomenon may be indicated, and accordingly, it may be possible to visually indicate that there is ice on the ground.

However, in the case of the paint composition for indicating the presence or absence of ice on the ground according to the prior art, it is difficult to accurately display the road surface condition of the road because it is formed to include a temperature sensing material and a moisture sensing material at the same time and only indicates the presence or absence of ice on the ground. There is a problem.

On the other hand, as another prior art, Korean Patent Registration No. 10-1765253, which was applied for and registered as a patent by the applicant and inventor of the present invention, has a title of "variable safety sign capable of displaying the road surface condition according to temperature and humidity". BRIEF DESCRIPTION OF THE DRAWINGS The invention has been disclosed, which is incorporated herein by reference and forms a part of the invention, which will be described in detail with reference to FIGS. 3 to 5 .

3 is a view for explaining the principle of a variable safety sign capable of displaying a road surface condition according to temperature and humidity according to the prior art. It shows a case where there is not, and b) and c) of FIG. 3 show a case where a wet road surface and icing occur in a road or bridge section, respectively.

Referring to FIG. 3, the variable safety sign capable of displaying the road surface condition according to temperature and humidity according to the prior art indicates the road surface condition in order to inform road users of the possibility of icing and the wet road surface of the road or bridge section. In the safety sign, a general paint 110 applied to be used as a background color on the safety sign; a first temperature-sensitive material 120 formed of a first temperature-sensitive material and applied to establish an interface with the general paint 110 by developing color at a preset temperature; It is formed of a second temperature-sensitive material that is colored at a lower temperature than the first temperature-sensitive material, and is applied to the inside of the interface set by the first temperature-sensitive material 120 to indicate the freezing state of a road or bridge section. 2 thermal material 130; a first humidity display paint 140 formed of a material for a first humidity display card (HIC) and applied to set a boundary surface with the general paint 110 by developing a color at a preset relative humidity; and a material for the second humidity display card that is colored at a higher humidity than the material for the first humidity display card, and is applied to the inside of the boundary surface set by the first humidity display paint 140, and the wet road surface of the road or bridge section It is configured to include a second humidity display paint 150 for displaying the state.

At this time, the first and second thermally sensitive materials 120 and 130 and the first and second humidity indicating paints 140 and 150 change the freezing state and wet road surface state of a road or bridge section according to temperature and humidity without an external power source. Each of the road surface conditions is displayed, and the color temperature of the first thermal material 120 and the color humidity of the first humidity display paint 140 may be adjusted according to the site conditions of the road or bridge section.

In addition, FIG. 4 is a diagram illustrating an example of displaying a temperature in characters on a variable safety sign capable of displaying a road surface condition according to the temperature and humidity shown in FIG. 3 .

When the text “Caution of Ice” is painted using the first thermal material 120 and the second thermal material 130 with the general paint 110 as the background color, the temperature of the road or bridge section is not below the freezing point. In this case, as shown in a) of FIG. 4, it is difficult for the driver to check with the naked eye, but after that, when the temperature of the road or bridge section is lowered to below the freezing point, as shown in b) of FIG. ", so that the driver can visually check it.

In addition, the variable safety sign 110 capable of displaying the road surface condition according to the temperature and humidity according to the prior art is a bridge protection fence, a road sign for safety precautions, a bridge railing, a road shoulder, a tunnel inside and structures such as entrances and exits. At least one may be applied.

5 is a view illustrating a case in which variable safety signs capable of displaying the road surface condition according to the temperature and humidity shown in FIG. 3 are installed on the side of the protective fence.

The variable safety sign 100 capable of displaying the road surface condition according to the temperature and humidity according to the prior art is lowered to the freezing point of the color development temperature of the first thermosensitive material, for example, 0° C., and at the same time the humidity is reduced. 1 When the color humidity of the material for the humidity display card is increased to, for example, 80% relative humidity, a snowflake shape is expressed by the first and second temperature-sensitive roads 120 and 130 as shown in FIG. 5, and this At the same time, the water droplet shape is expressed together by the first and second humidity display roads 140 and 150 . Accordingly, the driver driving the road or bridge section may recognize that the road surface condition of the road or bridge section is dangerous.

According to the variable safety sign that can display the road surface condition according to the temperature and humidity according to the prior art, the icy condition and the wet road condition of the road surface are accurately expressed using the temperature sensitive material and the humidity display paint, so that a separate external power source is used. It is possible to inform road users of the possibility of wet roads or icing on the road or bridge section without In addition, by displaying the icy state and wet road surface conditions corresponding to the temperature and humidity of the road or bridge section, respectively, the road driver can accurately grasp the road surface condition of the road or bridge section, thereby preventing the risk of accidents. .

In addition, according to the variable safety sign capable of displaying the road surface condition according to the temperature and humidity according to the prior art, the variable safety sign can be applied to the bridge protection fence, safety caution road sign, bridge handrail, road shoulder, tunnel interior and entrance, etc. It can be easily applied to the structure of

However, in the case of a variable safety sign that can display the road surface condition according to temperature and humidity according to the prior art, the color temperature (or critical temperature) of the safety sign applied with thermally sensitive material is determined by the terrain, bridge, and tunnel where the safety sign is installed. Since the freezing point is set to 0℃, which is the freezing point, considering only the atmospheric temperature regardless of topographical and geometrical factors, etc., there is a disadvantage that the relationship between the road surface temperature and the atmospheric temperature cannot be reflected in the critical temperature setting.

In particular, after sunrise in winter, even when the atmospheric temperature rises above 0°C, the road surface temperature remains below 0°C, resulting in frequent safety accidents due to icing, but this could not be reflected in the critical temperature setting. In addition, in the case of a variable safety sign capable of displaying the road surface condition according to temperature and humidity according to the prior art, it is inconvenient to use the first and second temperature-sensitive materials to indicate the risk of icing with color. there was.

Meanwhile, according to the Traffic Safety Sign Installation and Management Manual, road surface condition notice signs are installed in places where danger notices or alerts are needed to road users due to the road surface conditions so that road users can take appropriate actions.

In particular, in places where road surface icing occurs frequently due to weather conditions such as snow, rain, frost, etc., a road surface condition notice sign should be installed in a place to induce deceleration or call attention by notifying road users in advance of the relevant risk factors. For example, the installation location of the road surface condition warning sign can be installed on the right side of the road within the range of 50~200m in front of the starting point of the point where there is a risk factor. However, sections with high driving speed, such as automobile-only roads, can be installed overlappingly from 1,000m ahead from the starting point of the risk factor.

In addition, the mechanism of road freezing is determined by meteorological factors such as atmospheric temperature, dew point temperature, relative humidity, precipitation, and wind speed, and topographical and geometric factors such as terrain such as valleys and rivers, shade, sunlight, types of bridges, tunnels, pavements, and fill layers. can be determined according to In particular, the safety sign for the road surface icing warning is usually installed on a post separated from the road surface. Because they are different, it is necessary to correct the critical temperature of the road icing warning sign.

Republic of Korea Patent No. 10-1765253 (Registration Date: July 31, 2017), Title of Invention: "Variable safety sign capable of displaying road surface conditions according to temperature and humidity" Republic of Korea Patent Publication No. 2015-81585 (published on July 15, 2015), title of invention: "Paint composition for indicating the presence or absence of ice on the ground" Republic of Korea Patent No. 10-788403 (application date: May 7, 2004), title of invention: "Condensation prevention road traffic sign using thermal paint" Republic of Korea Patent No. 10-419758 (application date: May 19, 2003), title of invention: "Pavement road sign structure and manufacturing method thereof" Japanese Patent Laid-Open No. 2006-251155 (published on September 21, 2006), title of invention: "Display device" Republic of Korea Patent No. 10-1376284 (application date: March 13, 2014), title of invention: "Quick-drying room temperature curing plastic paint composition for road traffic signs" Republic of Korea Patent No. 10-1113173 (application date: January 31, 2012), title of invention: "Method for manufacturing information sign"

The technical problem to be achieved by the present invention to solve the above problems is to apply a thermal material that changes color depending on the temperature so that, when the temperature falls below the critical temperature of the thermal material, colors are developed with characters, symbols, and symbolic pictures. The purpose of this invention is to provide a temperature-sensitive road surface ice caution safety sign and a method for installing the same, which can prevent accidents by instructing road users or pedestrians about the risk of freezing on the road surface.

Another technical problem to be achieved by the present invention is the safety of temperature-sensitive road surface icing, which can instruct the road user only when there is a risk of icing in consideration of the road topography and geometrical state, bridges, facilities, and road conditions in the shade. It is intended to provide a sign and a method for installing the same.

Another technical problem to be achieved by the present invention is to add safety signs for safety signs for caution and icing produced by conventional methods without replacement to external power signs as well as safety signs for caution and icing by attaching additional safety signs in the form of auxiliary signs. It is intended to provide a temperature-sensitive road surface icing caution safety sign that can be installed and a method for installing the same.

Another technical problem to be achieved by the present invention is that it can be easily installed on road structures such as protective fences, median partitions and handrail rails, and on pedestrian paths, entrances or outdoor stairs to protect pedestrians from falls due to icing on the pedestrian paths. It is intended to provide a temperature-sensitive road surface icing caution safety sign that can be installed and a method for installing the same.

As a means for achieving the above-mentioned technical problem, the safety sign for the temperature-sensitive road surface ice warning according to the present invention is a safety sign for the road surface ice warning installed in front of the ice risk section so that the road user can check it, one side of the road Posts installed in the vertical direction to the buried; a safety sign installed on the upper part of the post and having a symbol picture indicating the possibility of vehicle slipping to road users; an auxiliary sign installed under the safety sign and having characters indicating road surface icing caution; and a color-sensitive text color layer formed in the safety sign, the color-sensitive text layer that develops color when the sign temperature corresponding to the outside temperature is lower than the critical temperature, which is the color temperature, wherein the color-sensitive text layer is to be confirmed by road users. In consideration of the road conditions, the initial critical temperature of the thermal material is set for each safety sign of caution for road surface icing, and the thermal material mixed with the thermal dye that changes color according to the initial critical temperature is applied to form the temperature sensing material. After installing the road icing warning safety sign to replace and attaching the colored character layer, the correction temperature is reconfirmed by repeatedly measuring the sign temperature and the road surface temperature corresponding to the outside temperature, and whether the critical temperature is reset for each safety sign. An attachable thermal material color developing sheet made of a thermal material reflecting the reconfirmed correction temperature, wherein the attachable thermal material color developing sheet can be adhered to the upper surface of the thermal material color character layer formed in the safety sign Adhesive sheet to which the adhesive is applied; a retroreflective layer formed on the adhesive sheet; a color-sensitive text layer that is formed with text on the retroreflective layer by applying a heat-sensitive material whose color changes according to temperature, and that develops color when a label temperature corresponding to the outside air temperature is lower than a critical temperature, which is a color development temperature; and a UV blocking layer formed of a UV blocking coating or sheet on the outermost layer to block UV rays when the thermal material is formed on the adherend in the form of painting, silk screen printing, or sheet form.

On the other hand, as another means for achieving the above-mentioned technical problem, the safety sign for the temperature-sensitive road surface ice warning according to the present invention is a safety sign for the road surface ice warning installed in front of the ice risk section so that the road user can check it, Posts buried in the vertical direction on one side of the road; a safety sign installed on the upper part of the post and having a symbol picture indicating the possibility of vehicle slipping to road users; an auxiliary sign installed under the safety sign and having characters indicating road surface icing caution; and a temperature-sensitive color-generating text layer formed on the auxiliary sign and displaying color when the sign temperature corresponding to the outside air temperature is lower than a threshold temperature, which is a color-forming temperature, wherein the color-sensitive text layer is formed by a road user. In order to be able to confirm, the initial critical temperature of the thermal material is set for each safety sign of road icing caution in consideration of the road condition, and the thermal material mixed with the thermal dye that changes color according to the initial critical temperature is applied to form the temperature sensing material. After installing the road icing warning safety sign so that the temperature charge color character layer is replaced and attached, the correction temperature is reconfirmed by repeatedly measuring the sign temperature and the road surface temperature corresponding to the outside temperature, and check whether the critical temperature is reset for each safety sign and an attachable thermal material color developing sheet made of a temperature sensitive material reflecting the reconfirmed correction temperature, wherein the attachable thermal material color developing sheet is adhered to the upper surface of the thermal material color developing character layer formed on the auxiliary sign board Adhesive sheet to which the adhesive is applied; a retroreflective layer formed on the adhesive sheet; a color-sensitive text layer that is formed with text on the retroreflective layer by applying a heat-sensitive material whose color changes according to temperature, and that develops color when a label temperature corresponding to the outside air temperature is lower than a critical temperature, which is a color development temperature; and a UV blocking layer formed of a UV blocking coating or sheet on the outermost layer to block UV rays when the thermal material is formed on the adherend in the form of painting, silk screen printing, or sheet form.

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On the other hand, as another means for achieving the above-described technical problem, the method of installing a temperature-sensitive road surface ice warning safety sign according to the present invention is installed in front of the ice risk section so that pedestrians can check it. A method for installing a safety sign, comprising: a) determining a location where there is a risk of icing by figuring out the topography and geometric condition of the road on which the road is erected; b) determining the installation location and quantity of road ice caution safety signs to be installed in front of the ice risk section; c) setting the initial critical temperature of the temperature-sensitive temperature for each safety sign of road surface icing caution in consideration of the road condition; d) preparing a road surface ice warning safety sign by applying a thermal material containing a thermal dye that changes color according to the initial critical temperature; e) reconfirming the corrected temperature by repeatedly measuring the mark temperature and the road surface temperature corresponding to the outside air temperature after installing the road ice caution safety sign; f) checking whether the critical temperature is reset for each safety sign; and g) replacing and attaching an adhesive thermal material color developing sheet made of thermal material reflecting the reconfirmed corrected temperature, but taking into consideration the road conditions so that road users can check the temperature-sensitive temperature for each safety sign It is characterized in that by setting an initial critical temperature of the material, and applying a thermal material mixed with a thermal dye that changes color according to the initial critical temperature to form a thermally sensitive color character layer.

According to the present invention, when the temperature falls below the critical temperature of the thermal material by applying the thermochromic paint, which changes color according to the temperature, the color is developed as text, sign, or symbolic picture to give the road surface to the road user or pedestrian. It is possible to prevent accidents by indicating the risk of freezing.

According to the present invention, the danger can be instructed only when there is a risk of icing to the road user in consideration of the road topography and geometrical state, bridges, facilities, and road conditions in the shade.

According to the present invention, it is possible to install a safety sign by additionally attaching a safety sign for caution against slipping and icing on the road produced by a conventional method in the form of an auxiliary sign without replacement to an external power sign as well as safety signs for caution and icing on the road.

According to the present invention, it can be easily installed on road structures such as protective fences, median partitions and railing rails, and can be installed on pedestrian paths, entrances or outdoor stairs to protect pedestrians from falling accidents caused by icing on the pedestrian paths.

According to the present invention, it can be easily installed using an existing safety sign, and can be easily replaced when damage or deterioration occurs in the safety sign to which the thermally sensitive material is applied.

1 is a view showing a road surface icing caution safety sign according to the prior art.
2 is a view schematically showing the principle of indicating the presence or absence of freezing through the coating composition according to the prior art.
3 is a view for explaining the principle of a variable safety sign capable of displaying a road surface condition according to temperature and humidity according to the prior art.
FIG. 4 is a diagram illustrating the display of temperature in characters on a variable safety sign capable of displaying a road surface condition according to the temperature and humidity shown in FIG. 3 .
5 is a view illustrating a case in which variable safety signs capable of displaying the road surface condition according to the temperature and humidity shown in FIG. 3 are installed on the side of the protective fence.
6 is a view showing a safety sign for a temperature-sensitive road surface icing caution according to an embodiment of the present invention.
7 is a diagram exemplifying the measurement results of the outside air temperature and the road surface temperature.
8 is a safety sign and an auxiliary sign in the case of applying a temperature-sensitive type of ice hazard sign for a vehicle in which a color-sensitive text layer is formed on the safety sign in the temperature-sensitive road surface icing caution safety sign according to an embodiment of the present invention. It is a cross-sectional view showing
9 is a cross-sectional view specifically illustrating an attachable thermal material color development sheet in a safety sign for a temperature-sensitive road surface icing caution according to an embodiment of the present invention.
10 is a safety sign and an auxiliary sign in the case of applying to a temperature-sensitive ice hazard sign for a vehicle in which a temperature-sensitive color character layer is formed on an auxiliary sign in the temperature-sensitive road surface icing caution safety sign according to an embodiment of the present invention; It is a cross-sectional view indicated by
11 is a diagram illustrating attachment and replacement of a safety sign for a temperature-sensitive type of road surface icing warning to a safety sign sheet for a temperature-sensitive type of road surface icing warning according to an embodiment of the present invention.
12 is an operation flowchart illustrating a method for installing a temperature-sensitive road surface icing caution safety sign according to an embodiment of the present invention.
13 is a view showing the application of a temperature-sensitive ice hazard sign for a vehicle in which a color-sensitive text layer is formed on the safety sign in the temperature-sensitive road surface ice caution safety sign according to the first embodiment of the present invention.
14 is a view showing the application of a temperature-sensitive ice hazard sign for a vehicle in which a color-sensitive text layer is formed on an auxiliary sign in the temperature-sensitive road surface icing caution safety sign according to the second embodiment of the present invention.
15 is a view showing that the temperature-sensitive road surface icing caution safety sign according to the third embodiment of the present invention is applied to the temperature-sensitive ice hazard sign for pedestrians composed of a safety sign and an auxiliary sign.
16 is a view showing that the temperature-sensitive road surface ice caution safety sign according to the fourth embodiment of the present invention is applied to a temperature-sensitive ice hazard sign for pedestrians in which a safety sign and an auxiliary sign are integrally formed.
17 is a view showing that the temperature-sensitive road surface icing caution safety sign according to the fifth embodiment of the present invention is applied to a road structure.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement them. However, the present invention may be embodied in several different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part "includes" a certain element, it means that other elements may be further included, rather than excluding other elements, unless otherwise stated.

Hereinafter, with reference to FIGS. 6 to 11, a safety sign for a temperature-sensitive road surface icing caution according to an embodiment of the present invention will be described, and with reference to FIG. An installation method will be described, and first to fifth embodiments of the present invention will be described with reference to FIGS. 13 to 17 .

[Temperature-sensitive road surface ice caution safety sign]

6 is a view showing a temperature-sensitive road surface icing caution safety sign according to an embodiment of the present invention. , and b) of FIG. 6 shows a safety sign for a vehicle temperature-sensitive road surface icing caution in which a color-sensitive text layer is formed on the auxiliary sign.

Referring to FIG. 6 a), the temperature-sensitive road surface ice caution safety sign 200 according to an embodiment of the present invention is a safety sign for road surface freezing caution installed in front of the freezing risk section so that road users can check it, It is configured to include a post 210 , a safety sign 220 , an auxiliary sign 230 , a thermal material color developing character layer 240 , and an attachable thermal material color developing sheet 250 .

The post 210 is vertically embedded in one side of the road.

The safety sign 220 is installed on the upper end of the post 210, and a symbolic picture indicating the possibility of vehicle slippage to road users is formed. At this time, a symbol picture representing the possibility of vehicle slipping to road users is formed in the center of the safety sign 220 .

The auxiliary sign 230 is installed under the safety sign 220, and characters indicating the road surface icing caution are formed. At this time, the symbol figure and the character of the road surface icing caution are formed by applying a general paint. Specifically, the auxiliary sign 230 includes "temperature-sensitive safety sign", "temperature-response safety sign", "temperature-sensitive sign", "temperature-responsive road ice caution sign", "red indication in case of danger of icing", "red -> Ice hazard", etc., so that road users can easily know that the temperature-sensitive road surface icing caution safety sign according to the embodiment of the present invention indicates the icing hazard according to the temperature with symbolic pictures and letters. can figure out This auxiliary sign 230 forms a black border on the white retroreflective sheet, and the text indicates in black. In addition, the auxiliary sign 230 is preferably made of a retroreflective sheet to improve visibility at night.

The color-sensitive character layer 240 is formed in the safety sign 220, and develops color when the label temperature corresponding to the outside air temperature is lower than the critical temperature, which is the color development temperature. At this time, the color-sensitive text layer 240 sets the initial critical temperature of the thermal-sensitive material for each safety sign for road surface icing caution in consideration of the road condition so that the road user can check it, and the color changes according to the initial critical temperature. It can be formed by applying a thermosensitive material mixed with a thermosensitive dye. In particular, the topography and geometry of the road, bridges, facilities, and shade are considered as the road condition, and the initial critical temperature of the thermally sensitive material is given as a freezing point (0°C) + a correction temperature (ΔT), and a safety sign If there is no corrected temperature (ΔT) measurement value for the location where the TC is installed, the experience value of 0~10℃ measured by region can be applied. here. It is apparent to those skilled in the art that the color development temperature of the thermosensitive material can be adjusted by adjusting the amount of the thermosensitive dye, so a detailed description thereof will be omitted.

Specifically, the thermosensitive material is composed of a thermochromic pigment, a binder, an additive, and a diluent. These thermosensitive dyes are usually formed in microencapsulated powder or liquid form. At this time, a reversible paint that has a transparent color above the critical temperature, changes to a color such as red below the critical temperature, and changes to a transparent color when the temperature is higher than the critical temperature is applied. In addition, the critical temperature and color of the thermosensitive material can be set during the manufacturing of the thermosensitive dye, and are set according to the "Installation method of a road surface icing caution safety sign" to be described later.

In addition, since the temperature-sensitive dye, which is phase-displaced at low temperature, is vulnerable to UV rays, it is preferable to use a bonding material having a UV-blocking effect as the bonding material in the composition of the thermosensitive material. In addition, when the thermosensitive material is formed on the adherend in the form of painting, silk screen printing, or sheet form, it is preferable to form a UV protection coating or sheet on the outermost layer for additional UV protection, as shown.

Referring back to FIG. 6 a), the adhesive color material color development sheet 250 responds to the outside temperature after installing a road surface icing caution safety sign to replace the thermal material color development character layer 240 to be attached. By repeatedly measuring the mark temperature and the road surface temperature, the correction temperature is reconfirmed, and by confirming whether the critical temperature is reset for each safety mark, the temperature sensitive material reflecting the reconfirmed correction temperature can be manufactured.

In addition, referring to FIG. 6 b), the temperature-sensitive icing caution safety sign 200 ′ according to an embodiment of the present invention is installed in front of the icing risk section so that road users can check the safety of the road icing caution As a cover, it is composed of a post 210, a safety sign 220', an auxiliary sign 230', a thermal material color-generating character layer 240 and an attachable thermal material color-generating sheet 250,

The post 210 is vertically embedded in one side of the road.

The safety sign 220 ′ is installed on the top of the post 210 , and a symbolic picture indicating the possibility of vehicle slippage to road users is formed.

The auxiliary sign 230 ′ is installed under the safety sign 220 , and characters indicating road surface icing caution are formed.

The color-sensitive character layer 240 is formed on the auxiliary sign plate 230 ′, and develops color when the label temperature corresponding to the outside air temperature is lower than the critical temperature, which is the color development temperature. At this time, the color-sensitive text layer 240 sets the initial critical temperature of the thermal-sensitive material for each safety sign for road surface icing caution in consideration of the road condition so that the road user can check it, and the color changes according to the initial critical temperature. It is formed by applying a temperature-sensitive material containing a temperature-sensitive dye.

The adhesive-type thermal material color-generating sheet 250 replaces the thermal material color-generating character layer 240 to be attached, and after installing a road icing warning safety sign, the mark temperature corresponding to the outdoor temperature and the road surface temperature are repeatedly measured. By reconfirming the corrected temperature and confirming whether or not the critical temperature is reset for each safety sign, the reconfirmed correction temperature may be reflected to be produced as a thermosensitive material.

Meanwhile, FIG. 7 is a diagram illustrating the measurement results of the outdoor temperature and the road surface temperature.

As shown in FIG. 7 , the average value of the outdoor air temperature and the road surface temperature measured for a road hypothesized in the central region of Korea can be expressed. At this time, the outside air temperature and the road surface temperature have a phase difference and a temperature difference (ΔT), because the rate of temperature change is slower on the road surface in contact with the ground or structure compared to the outside air.

In general, the road surface temperature gradually changes to below zero even when the outside air falls below zero, but on the other hand, it gradually rises and changes to zero even when the outside air becomes zero. For example, the reason that road surface icing accidents in winter mainly occur right after sunrise is that even if the outside air rises to the image, the road surface remains frozen below freezing, so there is a possibility that road users may not be aware of the icing. That is, despite the fact that the road surface still maintains a sub-zero freezing condition, it may not be possible to notify road users of the road surface freezing warning as the temperature-sensitive color text layer of the temperature-sensitive road surface ice warning safety sign becomes transparent. Accordingly, when setting the critical temperature for the color-sensitive text layer of the temperature-sensitive road surface ice warning safety sign, the correlation between the phase difference between the outside air temperature and the road surface temperature should be considered.

In addition, the temperature-sensitive road surface icing caution safety signs 200 and 200 ′ according to an embodiment of the present invention may be manufactured in a triangular, rectangular, or circular shape like a typical caution safety sign, and as shown in FIG. 17 to be described later. It can also be made in the form of a "belt".

On the other hand, FIG. 8 is a safety sign and an auxiliary sign in the case of applying to a temperature-sensitive ice hazard sign for a vehicle in which a temperature-sensitive color character layer is formed on the safety sign in the temperature-sensitive road surface icing caution safety sign according to an embodiment of the present invention. As a specific cross-sectional view, FIG. 8 a) is a cross-sectional view showing the safety sign 220, and FIG. 8 b) is a cross-sectional view showing the auxiliary sign 230. As shown in FIG.

Referring to FIG. 8 a), in the temperature-sensitive road surface ice caution safety sign 200 according to an embodiment of the present invention, the safety sign 220 includes a safety sign base 221, a yellow retroreflective layer 222, and a red retrograde. It consists of a reflective layer 223 and a general paint layer 224 .

The safety sign base 221 is fastened to the upper end of the post 210 . Here, the safety sign base 221 may be made of metal, plastic, fiber-reinforced polymer (FRP) material, and, as will be described later, a safety sign may be formed directly on a facility such as a protective fence or handrail rail.

The yellow retroreflective layer 222 is formed on the safety sign base 221 with a yellow background to ensure visibility at night, and the red retroreflective layer 223 is formed in red on the edge of the safety sign base 221 .

On the general paint layer 224, a symbol picture is formed to indicate the possibility of vehicle slippage to road users.

At this time, when the thermosensitive material is formed on the adherend in the form of painting, silk screen printing, or sheet form, a UV blocking layer 241 formed of a UV blocking coating or sheet is formed on the outermost layer to block UV rays.

In addition, referring to FIG. 8 a), in the temperature-sensitive road surface icing caution safety sign 200 according to an embodiment of the present invention, the auxiliary sign 230 is an auxiliary sign base 231, retroreflective layer 232, white It consists of a retroreflective layer 233 and a general paint layer 234 .

The auxiliary sign base 231 is fastened and fixed to the post 210 under the safety sign 220 .

The retroreflective layer 232 is formed on the background on the auxiliary sign base 231 , and the white retroreflective layer 233 is formed on the edge on the auxiliary sign base 231 .

The general paint layer 234 is formed with characters indicating road surface icing.

Meanwhile, FIG. 9 is a cross-sectional view specifically illustrating an attachable thermal material color developing sheet in a safety sign for a temperature-sensitive road surface icing caution according to an embodiment of the present invention.

Referring to FIG. 9 , in the temperature-sensitive road surface icing caution safety sign 200 according to the embodiment of the present invention, the adhesive sheet 251, the retroreflective layer 252, and the temperature-sensitive temperature sensitive material color developing sheet 250 are It includes a color developing character layer 253 and a UV blocking layer 254 .

The adhesive sheet 251 is coated with an adhesive so as to adhere to the upper surface of the color-sensitive character layer 240 formed in the safety sign 220, and the retroreflective layer 252 is formed on the adhesive sheet 251. do.

The color-sensitive text layer 253 is formed with text on the retroreflective layer 252 by applying a heat-sensitive material whose color changes according to the temperature, and the label temperature corresponding to the outside temperature is higher than the critical temperature, which is the color development temperature. It develops when it is lowered.

The UV blocking layer 254 is formed as a UV blocking coating or sheet on the outermost layer to block UV rays when the thermal material is applied to the adherend in the form of painting, silk screen printing, or sheet form.

In addition, FIG. 10 is a safety sign and auxiliary sign when applied to a temperature-sensitive ice hazard sign for a vehicle in which a color-sensitive text layer is formed on an auxiliary sign in the temperature-sensitive road surface ice caution safety sign according to an embodiment of the present invention. As a cross-sectional view specifically showing, FIG. 10 a) is a cross-sectional view showing the safety sign 220', and FIG. 10 b) is a cross-sectional view showing the auxiliary sign 230'.

Referring to FIG. 10 a), in the temperature-sensitive road surface ice caution safety sign according to an embodiment of the present invention, a temperature-sensitive type ice hazard sign for a vehicle in which a color-sensitive text layer is formed on an auxiliary sign. Safety when applied The sign 220 ′ includes a safety sign base 221 ′, a yellow retro-reflective layer 222 , a red retro-reflective layer 223 , and a general paint layer 224 .

The safety sign base 221 ′ is fastened and fixed to the upper end of the post 210 .

The yellow retroreflective layer 222 is formed on the safety sign base 221 with a yellow background to ensure visibility at night, and the red retroreflective layer 223 is formed in red on the edge of the safety sign base 221 .

On the general paint layer 224, a symbol picture is formed to indicate the possibility of vehicle slippage to road users.

Referring to FIG. 10 b), in the temperature-sensitive road surface ice warning safety sign according to an embodiment of the present invention, a temperature-sensitive type of ice hazard sign for a vehicle in which a color-sensitive text layer is formed on an auxiliary sign is an auxiliary when applied The sign 230 ′ includes an auxiliary sign base 231 , a retro-reflective layer 232 , a white retro-reflective layer 233 , a color-sensitive color character layer 240 , and a UV blocking layer 241 .

The auxiliary sign base 231 is fastened and fixed to the post 210 under the safety sign 220 .

The retroreflective layer 232 is formed on the background on the auxiliary sign base 231 , and the white retroreflective layer 233 is formed on the edge on the auxiliary sign base 231 .

In this case, the UV blocking layer 241 may be formed as a UV blocking coating or sheet on the outermost layer to block UV rays when the thermal material is formed on the adherend in the form of painting, silk screen printing, or sheet form.

On the other hand, Figure 11 is a view showing the replacement of the temperature-sensitive road surface icing caution safety sign sheet according to the embodiment of the present invention attached to the temperature-sensitive road surface icing caution safety sign sheet, Figure 11 a) is the existing safety sign and, b) of FIG. 11 shows that the existing auxiliary sign is attached and replaced with a safety sign sheet for the temperature-sensitive road surface icing caution.

As shown in a) of FIG. 11 , in the case of an existing safety sign, the text of the road icing caution is “road icing caution”, “road icing risk”, “road icing”, “road icing caution”, “road icing risk” ", "Ice danger", "Slip caution", "Road thin ice caution", etc. In this case, the indication position can be indicated in the form of additional signs around the symbol picture within the safety sign or outside the safety sign.

In particular, as shown in b) of FIG. 11 , when the additional sign is manufactured in the form of an additional sign, the danger of icing can be indicated by text, and there is an advantage in that the previously installed safety sign can be recycled. In addition, the temperature-sensitive road surface icing caution safety sign according to an embodiment of the present invention can be installed by recycling an already installed safety sign or installation facility, or by attaching a safety sign manufactured in the form of a sheet to the existing safety sign. . In this case, the thermosensitive material may be manufactured in the form of painting, digital printing, or sheet, and may be used by cutting characters.

After all, according to the safety sign for the temperature-sensitive road surface icing caution according to the embodiment of the present invention, when the temperature drops below the critical temperature of the thermal material by applying the thermochromic paint that changes color according to the temperature, Characters, symbols, and symbols are used to prevent accidents by instructing road users or pedestrians about the danger of freezing on the road surface. The danger can be indicated only when there is a danger of Safety signs can be installed.

[How to install temperature sensitive road surface ice caution safety sign]

12 is an operation flowchart illustrating a method for installing a temperature-sensitive road surface icing caution safety sign according to an embodiment of the present invention.

Referring to FIG. 12 , in the method for installing a temperature-sensitive icing caution safety sign according to an embodiment of the present invention, first, the location on the road with the risk of icing is determined by identifying the topography and geometrical state in which the road is erected. do (S110).

Next, the installation location and quantity of safety signs to be installed in front of the ice risk section are determined (S120).

Next, the initial critical temperature of the thermal treatment to be set for each safety sign is set in consideration of road conditions such as the topography and geometrical state of the road, bridges, facilities, and shaded areas (S130). At this time, the initial critical temperature = freezing point + correction temperature (ΔT) is given. If there is no corrected temperature (ΔT) measurement value for the location where the safety sign is to be installed, the experience value measured by region can be applied, for example, the experience value can be set to a value of 0 to 10℃ have. Here, the thermosensitive material is constituted by mixing a thermosensitive dye, a binder, an additive, and a diluent, and the thermosensitive material has a transparent color above the critical temperature, changes to a predetermined color below the critical temperature, and again above the critical temperature It may be a reversible paint that changes to a transparent color when

Next, a safety sign for icing on the road surface is manufactured by applying a thermosensitive material containing a thermosensitive dye that changes color according to the initial critical temperature for each set safety sign (S140). That is, in consideration of the road conditions so that road users can check, the initial critical temperature of the thermal material is set for each safety sign of road icing warning, and the thermal material mixed with the thermal dye that changes color according to the initial critical temperature is applied. Forms a color-sensitive character layer.

Next, after the safety sign for the road surface icing warning is installed at a predetermined position, the correction temperature is reconfirmed by repeating the measurement of the mark temperature corresponding to the outdoor temperature and the road surface temperature (S150).

Next, it is determined whether the threshold temperature set for resetting the threshold temperature for each safety sign is appropriate (S160). Here, it is preferable to determine the correlation between the outside air temperature and the critical temperature during the winter season.

Next, only when it is necessary to reset the initial critical temperature for each safety sign by using the correlation measurement result between the outside air temperature and the critical temperature, the adhesive type thermal material with characters engraved with the temperature sensitive material reflecting the reconfirmed corrected temperature Replace it with a color developing sheet (S170). Here, in the attachment-type thermal material color development sheet, after installing the road icing warning safety sign, the correction temperature is reconfirmed by repeatedly measuring the mark temperature and the road surface temperature corresponding to the outdoor temperature, and it is confirmed whether the critical temperature is reset for each safety sign Therefore, it can be manufactured as a temperature sensitive material reflecting the reconfirmed correction temperature.

[First to fifth embodiments]

13 is a view showing the application of a temperature-sensitive ice hazard sign for a vehicle in which a color-sensitive text layer is formed on the safety sign in the temperature-sensitive road surface icing caution safety sign according to the first embodiment of the present invention. a) shows that the color-sensitive text layer does not develop because the outside temperature is higher than the critical temperature, and b) of FIG. 13 shows that the color-sensitive text layer is colored as the outside temperature is lower than the critical temperature.

The safety sign 200 for the temperature-sensitive road surface icing caution according to the first embodiment of the present invention is a safety sign for the temperature-sensitive road surface freezing caution for vehicles in which a temperature-sensitive material color character layer is formed on the safety sign. It is configured to include a safety sign 220 , an auxiliary sign 230 , a thermal material color developing character layer 240 , and an attachable thermal material color developing sheet 250 . In this case, as described above, the color-sensitive color material layer 240 formed in the safety sign 220 may be attached and replaced with an attachable thermal material color-generating sheet 250 .

In the case of the temperature-sensitive road surface icing caution safety sign 200 according to the first embodiment of the present invention, as shown in FIG. 13 a), when the sign temperature corresponding to the outdoor temperature is above the critical temperature, 220) in a transparent color through the color-generating text layer 240 in the thermosensitive material to indicate icing caution with text, and then, as shown in FIG. 13 b), the label temperature corresponding to the outside temperature is below the critical temperature. Upon reaching , the temperature sensitive material color character layer 240 in the safety sign 220 may be colored red to indicate ice caution.

On the other hand, FIG. 14 is a view showing that the temperature-sensitive road surface ice warning safety sign according to the second embodiment of the present invention is applied to a vehicle temperature-sensitive ice hazard sign in which a color-sensitive text layer is formed on an auxiliary sign board.

The safety sign 200 ′ for the temperature-sensitive road surface icing caution according to the second embodiment of the present invention is a safety sign for a vehicle temperature-sensitive road surface icing notice in which a temperature-sensitive material color character layer is formed on an auxiliary sign, and a post (210) , a safety sign 220 ′, an auxiliary sign 230 ′, a thermal material color developing character layer 240 and an attachable thermal material color developing sheet 250 . At this time, as described above, the auxiliary sign plate The thermal material color development character layer 240 formed on the 230 ′ may be attached and replaced with an adhesive type thermal material color development sheet 250 .

In the case of the temperature-sensitive road surface icing caution safety sign 200 ′ according to the second embodiment of the present invention, as shown in FIG. The warning of icing is indicated with text or the like in a transparent color through the color-sensitive character layer 240 formed on the 230', and then, as shown in FIG. 14 b), the label temperature corresponding to the outside temperature is displayed. When the temperature is below the critical temperature, the color-sensitive text color layer 240 formed on the auxiliary sign 230 ′ may be colored red to indicate ice caution.

On the other hand, in the case of the temperature-sensitive road surface icing caution safety sign according to an embodiment of the present invention, it can be installed on the road as well as on the pedestrian path with the risk of icing, at the entrance, on the outdoor stairs, etc. to protect the pedestrian from falling accidents caused by icing on the pedestrian path. Such an ice caution sign for pedestrians may be installed as a temporary safety sign on a pedestrian path in winter, or may be installed as a safety sign on a wall of a building or facility.

15 is a view showing that the temperature-sensitive road surface ice caution safety sign according to a third embodiment of the present invention is applied to a temperature-sensitive ice hazard sign for pedestrians composed of a safety sign and an auxiliary sign. The temperature is higher than the critical temperature, indicating that the color-sensitive text layer does not develop, and FIG. 15 b) shows that the color-sensitive text layer is developed as the outside temperature is lower than the critical temperature.

15 a) and b), the temperature-sensitive road surface ice caution safety sign 300 according to the third embodiment of the present invention is for pedestrians installed in front of the ice risk section so that pedestrians can check it. As a road surface ice warning safety sign, it includes a post 310, a safety sign for pedestrians 320, an auxiliary sign for pedestrians 330, a color-sensitive thermal material color character layer 340, and an attached thermal material color-generating sheet 350. is composed by

The post 310 is vertically embedded in the front of the ice risk section of the pedestrian path.

The safety sign 320 is installed on the upper end of the post 310, and a symbol picture indicating the possibility of vehicle slippage to road users is formed.

The auxiliary sign for pedestrians 330 is installed under the safety sign 320 for pedestrians, and characters indicating road surface icing caution are formed.

The color-sensitive text layer 340 is formed in the pedestrian safety sign 320, and develops color when the sign temperature corresponding to the outside temperature is lower than the critical temperature, which is the color development temperature. At this time, the temperature-sensitive color character layer 340 is installed on a pedestrian path, an entrance or an outdoor stairway to protect pedestrians from falling accidents caused by icing on the sidewalk. It is set and formed by applying a thermosensitive material containing a thermosensitive dye that changes color according to the initial critical temperature.

The attachable thermal material color-generating sheet 350 replaces the thermal material color-generating character layer 340 to attach the pedestrian safety sign 320 and then sets the sign temperature and the road surface temperature corresponding to the outdoor temperature. Repeat measurement to reconfirm the corrected temperature, and to confirm whether the critical temperature is reset for each safety sign, and is manufactured as a thermosensitive material reflecting the reconfirmed corrected temperature.

On the other hand, FIG. 16 is a view showing that the temperature-sensitive road surface icing caution safety sign according to the fourth embodiment of the present invention is applied to the temperature-sensitive ice hazard sign for pedestrians in which the safety sign and the auxiliary sign are integrally formed. a) shows that the color-sensitive character layer does not develop because the outside temperature is higher than the critical temperature, and b) of FIG. 16 shows that the color-sensitive character layer is colored as the outside temperature is lower than the critical temperature.

16 a) and b), the temperature-sensitive road surface ice caution safety sign 400 according to the fourth embodiment of the present invention is a pedestrian road surface installed in front of the freezing risk section so that pedestrians can check it. As a safety sign for freezing caution, it is configured to include a post 410 , an integrated safety sign for pedestrians 420 , a thermal material color-generating character layer 430 , and an attachable thermal material color-generating sheet 440 .

The post 410 is vertically embedded in the front of the ice risk section of the pedestrian path.

The integrated safety sign 420 for pedestrians is installed on the top of the post 310, and a symbol picture indicating the possibility of vehicle slippage to road users is formed, and characters indicating the caution of road surface icing are integrally formed.

The color-sensitive text layer 430 is formed in the integrated safety sign 420 for pedestrians, and is colored when the sign temperature corresponding to the outside air temperature is lower than the critical temperature, which is the color development temperature.

Attachable thermal material color-generating sheet 440 replaces the thermal material color-generating text layer 430 to replace and attach the integrated safety sign 420 for pedestrians, and then the sign temperature and road surface temperature corresponding to the outdoor temperature. is repeatedly measured to reconfirm the corrected temperature, and by confirming whether the critical temperature is reset for each safety sign, the temperature sensitive material reflecting the reconfirmed corrected temperature is manufactured.

On the other hand, in the prior art, safety signs for icing caution are repeatedly installed on the road in the habitual ice hazard section from 1,000 m in front, but the temperature-sensitive icing caution safety signs according to the embodiment of the present invention are continuously installed on the road. Safe driving by continuously instructing road users about the danger of icing in areas with habitual ice hazard such as bridges, shaded areas, and curved roads by installing them in the form of "road icing danger color indicators" on the horizontal members of protective fences, central separation facilities, or railing rails can make it happen

For example, considering that empirically, the "road color guide line" installed on the road is more effective for road users than the general guide sign. It is more effective to form the color-sensitive material color development indicator line 530 .

17 is a view showing that the temperature-sensitive road surface icing caution safety sign according to the fifth embodiment of the present invention is applied to a road structure. It indicates that the color-sensitive color indicator line does not develop, and FIG. 17 b) shows that the color-sensitive color character layer and the color-sensitive color indicator line develop as the outside air temperature is lower than the critical temperature.

17 a) and b), the road structure 500 to which the temperature-sensitive road surface icing caution safety sign is applied according to the fifth embodiment of the present invention includes a road structure body 510 and a color-sensitive text color. It includes a layer 520 and a color-sensitive material color development indicator line 530 . At this time, the thermal material color development character layer 520 may be replaced with an attachable thermal material color development sheet 540, and the thermal material color development indicator line 530 is an attachable thermal material color development indicator sheet ( 550) can be replaced.

The road structure body 510 is a structure formed on at least one side of the road, and may be a protective fence, a central separation facility, or a railing rail, but is not limited thereto.

The color-sensitive text layer 520 is formed in the shape of a character and is formed on the road structure body 510 to develop a color when the outside temperature is lower than the critical temperature to indicate the risk of road icing.

The thermal material color development indicator line 530 is formed in a band shape and is formed on the road structure body 510 to develop a color when the outside temperature is lower than the critical temperature to indicate the risk of icing on the road surface.

The adhesive thermal material color development sheet 540 repeatedly measures the mark temperature and road surface temperature corresponding to the outside air temperature so that the thermal material color development character layer 520 is replaced and attached, and the correction temperature is reconfirmed, and the safety sign By checking whether the critical temperature is reset for each star, it is manufactured with a thermosensitive material that reflects the reconfirmed corrected temperature.

In the attachable thermal material color development indicator line sheet 550, the temperature-sensitive material color development indicator line 530 is replaced and attached, and the correction temperature is reconfirmed by repeatedly measuring the mark temperature corresponding to the outside temperature and the road surface temperature, and the safety sign By checking whether the critical temperature is reset for each star, it is manufactured with a thermosensitive material that reflects the reconfirmed corrected temperature.

After all, according to an embodiment of the present invention, it can be easily installed on road structures such as protective fences, median partitions and handrail rails, and can be installed on pedestrian paths, entrances or outdoor stairs to protect pedestrians from falls due to icing on the pedestrian paths. Also, it can be easily installed using an existing safety sign, and can be easily replaced if damage or deterioration occurs in the safety sign to which the thermally sensitive material is applied.

The above description of the present invention is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a dispersed form, and likewise components described as distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. do.

200, 200`: temperature sensitive road surface ice caution safety sign
210: post 220, 220`: safety sign
230, 230`: auxiliary sign 240: color-sensitive text layer
250: attachable thermal material color development sheet
221, 221`: safety sign base 222: yellow retroreflective layer
223: red retroreflective layer 224: general paint layer
231: auxiliary sign base 232: retroreflective layer
233: white retroreflective layer 241: UV blocking layer
251: adhesive sheet 252: retroreflective layer
253: temperature-sensitive color character layer 254: UV blocking layer
300: temperature-sensitive road surface ice caution safety sign
310: holding 320: pedestrian safety sign
330: auxiliary sign for pedestrians 340: color-sensitive text layer
350: attachable thermal material color development sheet
400: temperature-sensitive road surface ice caution safety sign
410: post 420: integrated safety sign for pedestrians
430: thermal material color development character layer 440: adhesive type thermal material color development sheet
500: road structures (protection fences, median dividers, handrail rails)
510: road structure body 520: color-sensitive thermal material color character layer
530: temperature-sensitive material color development indicator line 540: attachable thermal material color development sheet
550: attachable thermal material color development indicator sheet

Claims (34)

In the safety sign for road ice caution installed in front of the ice risk section so that road users can check it,
Post 210 embedded in the vertical direction on one side of the road;
a safety sign 220 installed on the post 210 and provided with a symbolic picture indicating the possibility of vehicle slipping to road users;
an auxiliary sign 230 installed under the safety sign 220 and having characters indicating road surface icing caution; and
It is formed in the safety sign board 220, and includes a color-sensitive color character layer 240 that develops color when the mark temperature corresponding to the outside air temperature is lower than the critical temperature, which is the color development temperature,
The temperature-sensitive color character layer 240 sets the initial critical temperature of the thermal-sensitive material for each safety sign for road surface icing caution in consideration of the road conditions so that the road user can check it, and the color-changing thermal pigment changes according to the initial critical temperature. It is formed by applying a thermosensitive material mixed with
After installing a road icing warning safety sign to replace and attach the thermally sensitive material color character layer 240, the correction temperature is reconfirmed by repeatedly measuring the sign temperature and the road surface temperature corresponding to the outdoor temperature, and the threshold for each safety sign Including an attachable thermal material color developing sheet 250 made of a thermal material reflecting the reconfirmed correction temperature by checking whether the temperature is reset,
The attachable thermal material color development sheet 250,
an adhesive sheet 251 coated with an adhesive so as to be adhered to the upper surface of the color-sensitive character layer 240 formed in the safety sign 220; a retroreflective layer 252 formed on the adhesive sheet 251; A color-sensitive thermal material that changes color according to temperature is applied to form characters on the retroreflective layer 252, and the color-sensitive thermal material develops color when the label temperature corresponding to the outside air temperature is lower than the critical temperature, which is the color development temperature. character layer 253; and a UV blocking layer 254 formed of a UV blocking coating or sheet on the outermost layer to block UV rays when the thermal material is formed on the adherend in the form of painting, silk screen printing, or sheet form. Ice warning sign. According to claim 1,
The initial critical temperature of the thermosensitive material is given as a freezing point (0°C) + a correction temperature (ΔT), and when there is no measured value of the correction temperature (ΔT) for the location where the safety sign is to be installed, 0 measured by region Temperature-sensitive road surface icing caution safety sign characterized by applying an experience value of ~10℃. According to claim 1,
Temperature-sensitive road surface ice caution safety sign, characterized in that the road topography and geometric condition, bridges, facilities, and shade are considered as the road conditions. According to claim 1, wherein the safety sign 220,
a safety sign base 221 fastened to the upper portion of the post 210;
a yellow retroreflective layer 222 formed on a yellow background on the safety sign base 221 to ensure visibility at night;
a red retroreflective layer 223 formed in red on an edge on the safety sign base 221; and
Including a general paint layer 224 that forms a symbolic picture to indicate the possibility of vehicle slipping to road users,
Temperature, characterized in that when the thermosensitive material is formed on the adherend in the form of painting, silk screen printing, or sheet form, a UV blocking layer 241 formed of a UV blocking coating or sheet is formed on the outermost layer to block UV rays Sensitive road surface ice caution safety sign. According to claim 1,
The thermochromic material is composed of a combination of a thermochromic pigment, a binder, an additive and a diluent, and the thermosensitive material has a transparent color above the critical temperature and a predetermined color below the critical temperature. Temperature-sensitive road surface icing caution safety sign, characterized in that it is a reversible paint that changes and changes to a transparent color when the critical temperature is exceeded. delete delete In the safety sign for road ice caution installed in front of the ice risk section so that road users can check it,
Post 210 embedded in the vertical direction on one side of the road;
a safety sign (220 ′) installed on the post 210 and having a symbol picture indicating the possibility of vehicle slipping to road users;
an auxiliary sign 230 ′ installed under the safety sign 220 and having characters indicating road surface icing caution; and
It is formed on the auxiliary sign board 230`, and includes a color-sensitive color character layer 240 that develops color when the label temperature corresponding to the outside air temperature is lower than the critical temperature, which is the color development temperature,
The temperature-sensitive color character layer 240 sets the initial critical temperature of the thermal-sensitive material for each safety sign for road surface icing caution in consideration of the road conditions so that the road user can check it, and the color-changing thermal pigment changes according to the initial critical temperature. It is formed by applying a thermosensitive material mixed with
After installing a road icing warning safety sign to replace and attach the thermally sensitive material color character layer 240, the correction temperature is reconfirmed by repeatedly measuring the sign temperature and the road surface temperature corresponding to the outdoor temperature, and the threshold for each safety sign Including an attachable thermal material color developing sheet 250 made of a thermal material reflecting the reconfirmed correction temperature by checking whether the temperature is reset,
The attachable thermal material color development sheet 250,
an adhesive sheet 251 coated with an adhesive so as to be able to adhere to the upper surface of the thermosensitive material color character layer 240 formed on the auxiliary sign board 230'; a retroreflective layer 252 formed on the adhesive sheet 251; A color-sensitive thermal material that changes color according to temperature is applied to form characters on the retroreflective layer 252, and the color-sensitive thermal material develops color when the label temperature corresponding to the outside air temperature is lower than the critical temperature, which is the color development temperature. character layer 253; and a UV blocking layer 254 formed of a UV blocking coating or sheet on the outermost layer to block UV rays when the thermal material is formed on the adherend in the form of painting, silk screen printing, or sheet form. Ice warning sign. 9. The method of claim 8,
The initial critical temperature of the thermosensitive material is given as a freezing point (0°C) + a correction temperature (ΔT), and when there is no measured value of the correction temperature (ΔT) for the location where the safety sign is to be installed, 0 measured by region Temperature-sensitive road surface icing caution safety sign characterized by applying an experience value of ~10℃. 9. The method of claim 8,
Temperature-sensitive road surface ice caution safety sign, characterized in that the road topography and geometric condition, bridges, facilities, and shade are considered as the road conditions. The method of claim 8, wherein the auxiliary sign (230'),
an auxiliary sign base 231 fastened to the post 210 under the safety sign 220;
a retroreflective layer 232 formed on the base on the auxiliary sign base 231; and
Including a white retroreflective layer 233 formed on the edge on the auxiliary sign base 231,
Temperature, characterized in that when the thermosensitive material is formed on the adherend in the form of painting, silk screen printing, or sheet form, a UV blocking layer 241 formed of a UV blocking coating or sheet is formed on the outermost layer to block UV rays Sensitive road surface ice caution safety sign. 9. The method of claim 8,
The thermosensitive material is constituted by mixing a thermosensitive dye, a binder, an additive and a diluent, the thermosensitive material has a transparent color above the critical temperature, changes to a predetermined color below the critical temperature, and becomes transparent again when the critical temperature is higher Temperature-sensitive road surface ice caution safety sign, characterized in that it is a color-changing reversible paint. delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete In the method for installing a safety sign for pedestrians to be aware of icing on the road surface, which is installed in front of an ice risk section so that pedestrians can check it,
a) determining the location where there is a risk of icing by identifying the topography and geometric condition of the road;
b) determining the installation location and quantity of road ice caution safety signs to be installed in front of the ice risk section;
c) setting the initial critical temperature of the temperature-sensitive temperature for each safety sign of road surface icing caution in consideration of the road condition;
d) preparing a road surface ice warning safety sign by applying a thermal material containing a thermal dye that changes color according to the initial critical temperature;
e) reconfirming the corrected temperature by repeatedly measuring the mark temperature and the road surface temperature corresponding to the outside air temperature after installing the road ice caution safety sign;
f) checking whether the critical temperature is reset for each safety sign; and
g) replacing and attaching an adhesive thermal material color developing sheet made of thermal material reflecting the reconfirmed correction temperature;
In order for road users to check, the initial critical temperature of the thermal material is set for each safety sign of road icing warning in consideration of the road conditions, and the temperature-sensitive temperature is reduced by applying the temperature-sensitive material containing the thermal dye that changes color according to the initial critical temperature. A method of installing a temperature-sensitive road surface icing caution safety sign, characterized in that it forms a color character layer. 31. The method of claim 30,
A method of installing a temperature-sensitive icing caution safety sign, characterized in that the road topography and geometrical state, bridges, facilities, and shade are considered as the road conditions of step c). 31. The method of claim 30,
The initial critical temperature of the thermosensitive material is given as a freezing point (0°C) + a correction temperature (ΔT), and when there is no measured value of the correction temperature (ΔT) for the location where the safety sign is to be installed, 0 measured by region A method of installing a temperature-sensitive road surface icing caution safety sign, characterized in that an experience value of ~10°C is applied. 31. The method of claim 30,
The thermosensitive material is constituted by mixing a thermosensitive dye, a binder, an additive and a diluent, the thermosensitive material has a transparent color above the critical temperature, changes to a predetermined color below the critical temperature, and becomes transparent again when the critical temperature is higher A method of installing a temperature-sensitive road surface ice caution safety sign, characterized in that it is a color-changing reversible paint. 31. The method of claim 30,
For the attachable thermal material color-generating sheet in step g), after installing the road icing warning safety sign, the correction temperature is reconfirmed by repeatedly measuring the mark temperature and the road surface temperature corresponding to the outdoor temperature, and whether the critical temperature is reset for each safety sign A method for installing a temperature-sensitive road surface icing caution safety sign, characterized in that it is manufactured with thermal material reflecting the reconfirmed correction temperature by checking the

Images