KR102307889B1 - Led display board with built in light receiving apparatus function - Google Patents

Abstract

The present invention relates to an LED billboard having a light receiving apparatus function embedded therein, which is installed on a roadside of a driving road on which vehicles are driven. According to the present invention, the LED billboard comprises: a main body (10) provided in a case shape on the upper side of a fixing table (92) installed on a side pole (5); a real-time temperature guide board (20) provided on the front part of the main body (10) and including a first temperature display unit (21) displaying the current temperature (t1) around the main body (10) and a second temperature display unit (25) displaying the current road surface temperature (t2) of a driving road (2) to be recognized by a driver or pedestrian, wherein the first temperature display unit (21) and the second temperature display unit (25) are operated through an LED module (12), the current road surface temperature (t2) displays data measured through a road surface temperature meter (70) provided on the main body (10) on the real-time temperature guide board (20), and the road surface temperature meter (70) including a measuring means (72) arranged to scan a laser toward a road surface of the driving road (2); and a light receiving apparatus (100) installed integrally with the main body (10) to detect ambient light and control the brightness of the temperature guide board to be automatically adjusted. Accordingly, the LED billboard informs a driver of the current ambient temperature and the current road surface temperature in real time in winter to display an appropriate safety speed according to ice precautions and guide the amount of snow on the road surface in real time, thereby providing an effect of promoting safe driving of the vehicle. In addition, the brightness of the LED billboard is automatically adjusted according to the ambient brightness, thereby providing effects of saving energy and preventing light pollution when installed in residential areas.

Description

LED signage with built-in light receiving device {LED DISPLAY BOARD WITH BUILT IN LIGHT RECEIVING APPARATUS FUNCTION}

The present invention relates to an LED signboard with a built-in light-receiving device function, and more particularly, mainly in winter, by guiding the driver of the current ambient temperature and the current road surface temperature in real time to display an appropriate safety speed according to the icing warning, and also It relates to an LED signboard with a built-in light-receiving device function to promote safe operation of vehicles by guiding the amount of snowfall in real time.

In general, a road guide sign serves to provide accurate road information to drivers or pedestrians, and is installed on a support frame (or support post) provided on the road or in the middle of the road, and the corresponding road information of the road guide sign is , is provided and used in a form including various types of characters, symbols, or figures, or a combination thereof depending on the region, location, etc.

Since most of these conventional road guide signs are used in the form of text or graphic guides attached, they have no choice but to be used as single guide signs. However, this is only a sequential display of the fixed comments. Conventional road guide signs such as the above two have a problem in that drivers or pedestrians cannot quickly respond to the surrounding environment or surrounding safety situation that changes in real time because they have no choice but to provide guidance suitable for the corresponding road situation.

Domestic Registered Patent No. 10-0560382, 'Eco-friendly road guide sign '

Therefore, it is an object of the present invention to display the appropriate safe speed according to the icing caution by guiding the driver in real time the current ambient temperature and the current road surface temperature in winter, and also to promote the safe operation of the vehicle by guiding the amount of snow on the road surface in real time. It is to provide an LED signboard with a built-in light receiving device function.

Another object of the present invention is to provide an LED signboard having a built-in light receiving device function such that the brightness of the LED signboard can be automatically adjusted according to the intensity of external light.

In the present invention according to the above object, in configuring the LED signboard (A) with a built-in light-receiving device function installed on the side road (5) of the driving road (2) on which the vehicle (3) is operated, the side road ( 5) the body 10 provided in the form of a case on the upper side of the fixing table 92 installed on the first body 10, and the first body 10 provided on the front side of the body 10 to display the current temperature t1 around the body 10 A real-time temperature guide plate 20 provided with a temperature display unit 21 and provided with a second temperature display unit 25 for displaying the current road surface temperature t2 of the driving road 2 to be recognized by a driver or pedestrian; The first temperature display unit 21 and the second temperature display unit 25 are operated through the LED module 12 , and the current road surface temperature t2 is measured through the road surface temperature meter 70 provided on the main body 10 . The measured data is displayed on the real-time temperature guide plate 20, and the road surface temperature measuring device 70 includes a measuring means 72 arranged to scan a laser toward the road surface of the driving road 2, and the main body 10. It is characterized in that it consists of a light-receiving device 100 that is installed integrally with the light-receiving device 100 to detect the ambient light and control the brightness of the temperature guide plate to be automatically adjusted.

According to the present invention, mainly in winter, the current ambient temperature and the current road surface temperature are displayed to the driver in real time to display an appropriate safe speed according to the icing warning, and also the amount of snow on the road surface is provided in real time to promote safe driving of the vehicle. There are effects such as can.

In addition, there is an effect of saving energy and preventing light pollution when installed in residential areas by automatically adjusting the brightness of the LED according to the brightness of the surroundings.

1 is an example of installation of an LED signboard with a built-in light-receiving device function according to the present invention;
Figure 2 is an exemplary view seen from the front of the LED guide signboard according to the present invention,
3 is an exemplary view of a real-time temperature guide plate according to the present invention;
4 is an exemplary view of a safe speed display according to the current road surface temperature according to the present invention;
5 to 6 are block diagrams showing the detailed configuration of the light receiving device of the present invention;
7 is a view showing the operation configuration of the road condition notification unit of the present invention;
8 is an exemplary view of an earthquake sensor installed on an LED guide signboard according to the present invention;
9 is an exemplary view of a general road guide according to the present invention;
10 is an exemplary view of a snow load measuring device and a snow load display unit according to the present invention;
11 is an exemplary view of a safe speed display according to the current snow load according to the present invention;
12 is a view showing the configuration of a measurement unit according to an embodiment of the present invention;
13 is an exemplary diagram of an LED module according to the present invention.

Hereinafter, specific details for carrying out the present invention will be described in more detail with reference to the accompanying drawings.

The present invention mainly provides a light receiving device that informs the driver of the current ambient temperature and the current road surface temperature in real time to display an appropriate safe speed according to the icing warning, and also guides the amount of snow on the road surface in real time to promote safe driving of the vehicle. It relates to an LED signboard with a built-in function. Referring to FIGS. 1 to 13 , it includes a body 10 , a real-time temperature guide plate 20 , and a road surface temperature meter 70 .

The present invention is an LED signboard (A) with a built-in light receiving device 100 function installed on the side road 5 of the driving road 2 on which the vehicle 3 is driven, as shown in FIG. 1 , in more detail. As shown in FIG. 2 , the main body 10 is provided in the form of a case on the upper side of the fixture 92 installed on the side noji 5 .

The body 10 is mainly made of stainless steel and is formed in a rectangular parallelepiped shape, and has a height and is fixed to the upper side of the fixing table 92 on the floor support 8 horizontally installed on the side wall 5 . At this time, although not shown, the main body 10 may be implemented to be adjustable in height on the holder 92 .

A first temperature display unit 21 is provided on the front portion of the main body 10 to display the current temperature t1 around the main body 10 as shown in FIG. 2 , and the current road surface temperature of the driving road 2 ( A real-time temperature guide plate 20 provided with a second temperature display unit 25 for displaying t2) to be recognized by a driver or pedestrian is provided.

The current temperature t1 is measured through a conventional temperature measuring device and displayed through the first temperature display unit 21 , and the current road surface temperature t2 is measured using a road surface temperature measuring device 70 provided on the main body 10 . The measured data is displayed on the real-time temperature guide plate 20 . At this time, the road surface temperature measuring device 70 is provided with a measuring means 72 arranged to scan the laser toward the road surface of the driving road 2 .

As a specific embodiment of the real-time temperature guide plate 20 having the first temperature display unit 21 and the second temperature display unit 25 described above, as shown in FIG. Further, a reference standard speed display unit 22 indicating , is further provided, and a real-time safe speed display unit 26 corresponding to the current road surface temperature t2 displayed on the second temperature display unit 25 is further provided.

At this time, when the temperature difference between the current temperature t1 and the current road surface temperature t2 is -2 to -5°C, as shown in FIG. 22) is reduced by 30-40% of the reference speed, and when the temperature difference is -6 to -10°C, the safe speed is reduced by 50-60% of the reference speed, and when the temperature difference is -11°C or more The safe speed is configured to be displayed with a reduction of 80 to 90% of the reference speed, and mainly in winter, the current ambient temperature (t1) and the current road surface temperature (t2) are provided to the driver in real time to display the appropriate safety speed according to the icing warning. By doing so, it is possible to achieve safe operation of the vehicle 3 .

In addition, the first temperature display unit 21 and the second temperature display unit 25 on the real-time safe speed display unit 26 are implemented to be operated through the LED module 12. As an embodiment, the LED module as shown in FIG. (12) is provided in a plurality on the seating frame 125 recessed to the rear side based on the front part of the real-time temperature guide plate 20 so as to be seated and fixed.

At this time, a rear exposure hole 126 and a fastening hole 127 are formed on the seating frame 125 for the ease of installation and wire connection of the LED module 12 , and the front and rear edges of the real-time temperature guide plate 20 have front and rear A plurality of position adjustment holes 129 are formed at a distance spaced apart in the direction so that they can be fixed at selected positions on the inner surface of the main body 10 provided outside the rim of the real-time temperature guide plate 20 .

In the present invention, it may be configured to include a light receiving device 100 that is integrally installed on the main body 10 and controls the brightness of the temperature guide plate to be automatically adjusted by sensing ambient light.

The light receiving device 100 detects the ambient light in which the LED sign A is installed and controls the brightness of the LED sign A to be automatically adjusted according to the surrounding brightness.

When the detailed configuration of the light receiving device 100 is described with reference to FIG. 5 , the control unit 102 that manages the overall operation of the light receiving device 100 and the LED signboard A automatically brighten according to the intensity of ambient light. LED brightness setting to control the brightness of the light receiving unit 104 that detects ambient light so that the light can be adjusted, and the LED module 12 installed on the LED signboard (A) according to the ambient brightness detected by the light receiving unit 104 The unit 106, the LED color setting unit 108 for controlling the emission color of the LED module 12 installed on the LED display board (A) according to the ambient brightness sensed by the light receiving unit 104, and the LED display panel (A) ) receiving the installed location information so that the brightness can be automatically adjusted during the day and at night, the GPS receiver 110 and the timer setting unit 112 for adjusting the time for which the light emission of the LED module 12 is maintained; It is composed of a manual setting unit 114 to manually operate the LED signboard (A) whose brightness is automatically adjusted.

The light receiving unit 104 detects ambient light at the location where the LED signboard A is installed, measures the illuminance, and sets the brightness of the LED module 12 according to the measured illuminance.

As an example, in the daytime, there is a lot of ambient light such as sunlight, so the information of the LED signboard (A) can be easily grasped visually by raising the luminance of the LED signboard (A) to brighten it. Even if the luminance of A) is lowered, the information of the LED signboard (A) can be visually checked easily.

The brightness of the LED module 12 is controlled by the LED brightness setting unit 106 according to the illuminance measured by the light receiving unit 104 .

The LED brightness setting unit 106 controls the brightness of the LED module 12 to be automatically adjusted according to the illuminance measured by the light receiving unit 104, and the brightness of the LED module 12 is automatically adjusted according to the preset illuminance. After setting to be adjusted, when the measured illuminance value matches the preset illuminance, the brightness of the corresponding LED module 12 is controlled.

In addition, the LED color setting unit 108 changes the color of the LED module 12 according to the illuminance measured by the light receiving unit 104, and in a state where a plurality of LED modules 12 having various colors are installed. By combination, various luminous colors are realized.

This causes a large difference in visibility depending on the color of the surroundings due to the characteristics of the LED signboard (A) installed outdoors, and the emission color of the LED signboard (A) is adjusted to match the change of the surrounding environment.

As an example, in the case of an LED signboard (A) mainly installed on the roadside, when the leaves of a street tree in summer are green, the LED module 12 of the LED signboard (A) is controlled to emit a red color to increase visibility, In autumn, when the leaves of a street tree change to a red color, the LED module 12 of the LED signboard (A) is controlled to emit light in a green color.

That is, the information guided on the LED signboard (A) is provided by automatically adjusting the luminous color of the LED module 12 according to the environment in which the LED signboard (A) is installed according to the season, weather, and the color of the surrounding building. It has the effect of making it visually easy to stand out.

The GPS receiver 110 controls the brightness of the LED module 12 to be automatically adjusted during the day and night time using the location information where the LED signboard A is installed.

During the daytime, the ambient light such as sunlight is bright and the light of the LED signboard (A) is not easily noticeable, so that the light of the LED module 12 is emitted strongly. On the contrary, at night, the LED signboard ( As the guide of A) is easily visible, the LED module 12 should be controlled to emit light relatively weakly.

To this end, the brightness of the LED module 12 is automatically controlled by determining whether it is daytime or nighttime after setting sunrise and sunset times suitable for the GPS signal received by the GPS receiver 110 .

The timer setting unit 112 may control the LED module 12 to emit light only in a time period in which the LED sign A installed on the roadside is passed by a car or a person.

To this end, a separate traffic sensor (not shown) may be installed before the location where the LED signboard (A) is installed, and when the traffic of a car or a person is detected by the traffic sensor, the LED module 12 emits light. , there is a power saving effect by preventing the LED module 12 from emitting light again after a vehicle or a person passes.

The manual setting unit 114 is to manually set the operation of the LED signboard (A) described above when it does not operate due to an error, etc. In order to prevent accidents caused by road condition information incorrectly transmitted due to a malfunction, the operator's It is manually operated by manipulation, and as an example, a separate manipulation panel may be installed.

In the present invention, when installing the LED sign board (A), a plurality of LED sign boards (A) can be installed at regular intervals on the road, and a remote control that operates in conjunction while sharing data between a plurality of installed LED sign boards (A) The control unit 116 may be configured.

Referring to Figure 6, the remote control unit 116 is a wireless communication unit 118 for transmitting and receiving data between a plurality of installed LED sign boards (A), and a plurality of LED display boards ( The data sharing unit 120 that allows A) to be shared together, and the road condition information generated on the road in the driving direction of the vehicle through the road condition information shared through the data sharing unit 120 LED display board (A) It is composed of a road condition guide unit 122 that guides so as to prevent an accident by allowing it to be confirmed in advance through the .

The wireless communication unit 118 is for transmitting and receiving data between a plurality of installed LED sign boards (A), and transmits and receives data using LTE and 5G networks, which are mobile communication networks, and shares the data.

The data sharing unit 120 manages and mutually shares data transmitted and received by the wireless communication unit 118, and in the process of transmitting and receiving various road condition information, the corresponding LED signboard A selects and shares only the necessary road condition information. You may.

That is, by transmitting and receiving data to selectively share only necessary road condition information, it is possible to reduce data usage fees of mobile communication networks as well as speedy data processing.

The road condition guide unit 122 transmits and receives road condition information collected from a plurality of installed LED sign boards (A) by the wireless communication unit 118 and shares the shared road condition information through the data sharing unit 120 on the LED sign board. By guiding through (A), the road condition in the direction of travel can be confirmed in advance through the LED signboard (A) installed at the current location, so that dangerous situations can be recognized in advance and accidents can be prevented.

It is difficult to visually check the situation on the other side of the road at night or on a curved road.

For example, as in FIG. 8, wild animals that are expected to be killed on the other side of the road may be on the road, or in the case of a mountainous area, a rock that has rolled down from the mountain may be on the road. By allowing the driver to be informed of the condition of the preceding road through the LED signboard (A) in advance, it is possible to inform the driver to drive at a low speed or to pass the relevant road with attention.

On the other hand, as another embodiment of the present invention, as shown in FIG. 2 , an earthquake sensor 80 is provided inside the body 10 . At this time, the main body 10 is formed in a rectangular shape when viewed from the front, and the earthquake sensor 80 receives the largest vibration on the main body 10 in order to increase the sensitivity of vibration caused by an earthquake or other external force. It is preferable to configure so as to be provided inside each corner of (10).

As a more specific embodiment, as shown in FIG. 8 , the earthquake sensor 80 includes an elastic spring 82 attached to the inner surface of the main body 10 and an actuator 81 fixed to the upper end of the elastic spring 82 . ) and 2 to 4 sensor plates 82 provided on the periphery of the actuator 81, the number of contact of the actuator 81 colliding on the sensor plate 82 due to earthquake or vibration, and It is preferable to configure to measure the intensity of the earthquake according to the intensity.

As another embodiment of the present invention, as shown in FIG. 9 , a general road guide part 30 is extended on the side of the real-time temperature guide plate 20 , and an attached road guide sign plate is formed on the general road guide part 30 . By providing (32), the real-time temperature guide plate 20 and the general road guide unit 30 of the present invention can be used simultaneously or selectively.

Meanwhile, as another embodiment of the present invention, as shown in FIG. 10 , a snow load measuring device 50 for measuring the amount of snow on the driving road 2 is provided on the main body 10 . The snow load measuring device 50 is provided with a measuring unit 52 arranged to scan a laser toward the road surface of the driving road 2, and the data measured through the snow load measuring device 50 is displayed on the real-time temperature guide plate 20. It is configured to be displayed on the snow load display unit 54 provided in the .

As a specific embodiment of this, the snow load meter 50 sets the reference road surface height h1 corresponding to the road surface of the driving road 2 through the measurement unit 52 and then sets it on the road surface of the driving road 2 . When the snow load occurs, the snow cover height (h2) is measured in real time, and the height difference between the snow cover height (h2) and the reference road surface height (h1) is displayed on the snow load display unit 54 .

Through this, as shown in FIG. 11, when the height difference between the snow height h2 and the reference road surface height h1 is 1 to 10 mm, the safety speed displayed on the real-time safe speed display unit 57 is determined by the reference regulation speed display unit 22. 10 to 20% of the reference speed indicated in , and when the height difference is 11 to 30 mm, the safe speed is reduced by 30 to 40% of the reference speed, and when the height difference is 31 to 50 mm, the safe speed is The safe operation of the vehicle 3 can be further promoted by reducing the reference speed by 50 to 60% and displaying the safety speed by reducing 70 to 80% of the reference speed when the height difference is 51 mm or more. .

As an embodiment of the present invention, the measuring unit 52 may include an ultrasonic measuring unit 53 that transmits and receives an ultrasonic signal to measure the height.

The ultrasonic measuring unit 53 measures the amount of snow by an ultrasonic signal in order to increase the accuracy of measuring the height of snow accumulated on the road. It is unnecessary by filtering the signal, but it makes it possible to accurately measure the amount of snowfall by reducing the received ultrasonic signal value.

When receiving the ultrasonic signal, there may be an ultrasonic signal that hits the snow on the road and is reflected, but there is also an ultrasonic signal that is reflected from the surrounding structures rather than the actual snow height. will raise

Referring to FIG. 12 , the ultrasonic measuring unit 53 measures the range of the frequency signal reflected by hitting the snow accumulated on the road, not the surrounding object, among the ultrasonic frequencies reflected and received by snow to measure the snow height of the road. The receiving frequency reflected after being transmitted through the ultrasonic measuring unit 53 so as to compare the frequency measurement value received through the setting unit 54 and the ultrasonic measuring unit 53 with the initial frequency signal value to set it as an initial value. The ultrasonic input unit 55, which reads in real time and inputs it as a frequency measurement value, and the setting unit ( 54) a comparison unit 56 for discriminating the reception frequency reflected by the surrounding structure, which is a frequency that deviates from the frequency signal value set by the method, and the reception frequency measurement value that deviates from the frequency signal value initially set through the comparison unit 56 A storage unit 57 that stores only the reception frequency that actually hits the snow except for the reception frequency for measuring the amount of snow so that the height of the snow piled up on the road can be measured, and the storage unit 57 accumulated on the road After measuring the height of the snow, the distance to the road on which there is no snow is measured and stored in advance, and the actual snow accumulated on the road is taken into account by the ultrasonic signal to consider the distance to the snow accumulated on the road and the distance to the road where there is no snow. It is composed of a conversion unit 58 that calculates the height of .

The setting unit 54 sets the initial value of the received ultrasonic signal, which is a reference value for filtering the received ultrasonic signal, and is set to remove the received ultrasonic signal that is out of the preset initial value.

The ultrasonic input unit 55 stores the ultrasonic signal received through the ultrasonic measuring unit 53 in real time, and the ultrasonic signal stored in the ultrasonic input unit 55 is transmitted to the setting unit 54 through the comparing unit 56 . It is confirmed that an unnecessary received ultrasonic signal is received by comparing it with the stored initial ultrasonic signal.

After determining the received ultrasonic signal out of the set range through the comparison unit 56, the ultrasonic signal out of the set range is filtered and removed, and the filtered received ultrasonic signal is stored again in the storage unit 57 and used to measure the amount of snow. .

The conversion unit 58 calculates a distance value between the snow on the road and the ultrasonic measuring unit 53 measured through the filtered received ultrasonic signal and a distance value between the ultrasonic measuring unit 53 and the snow on the road where snow is not previously accumulated. This translates to the height of the snow on the road.

That is, the distance between the road and the ultrasonic measuring unit 53 is measured before the snow is piled up, and the distance between the snow on the road and the ultrasonic measuring unit 53 is measured after the snow is piled up by using the distance difference before and after. It is possible to measure the height of snow accumulated on the road.

And, it can be configured to be used as main power or reserve power by providing an angle-adjustable photovoltaic module 61 on the upper side of the main body 10 .

Although specific embodiments have been described in the above description of the present invention, various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be determined by the described embodiments, but should be determined by the claims and equivalents of the claims.

(2)-- Driving Road (3)-- Vehicle
(5)-- lateral field
(10)-- Main body (12)-- LED module
(20)-- Real-time temperature information board
(21)-- First temperature display unit (25)-- Second temperature display unit
(70)-- Road surface temperature measuring device (72)-- Measuring means
(100)-- light receiving device

Claims (11)

In constituting an LED signboard with a built-in light receiving device function installed on the side road of the driving road on which the vehicle is operated,
The main body ( 10) and
A first temperature display unit 21 is provided on the front part of the main body 10 to display the current temperature t1 around the main body 10, and the current road surface temperature t2 of the driving road 2 is displayed by the driver. or a real-time temperature guide plate 20 provided with a second temperature display unit 25 that displays to be recognized by pedestrians;
The first temperature display unit 21 and the second temperature display unit 25 are operated through the LED module 12 , and the current road surface temperature t2 is measured using a road surface temperature meter 70 provided on the main body 10 . The measured data is displayed on the real-time temperature guide plate 20, and the road surface temperature measuring device 70 includes a measuring means 72 arranged to scan a laser toward the road surface of the driving road 2;
A light receiving device 100 installed integrally with the main body 10 and controlling the brightness of the temperature guide plate to be automatically adjusted by sensing ambient light;
The remote control unit 116 is configured to operate in conjunction while sharing data between a plurality of LED signboards (A) installed at regular intervals on the road.
The light receiving device 100 detects ambient light so that the control unit 102 that manages the overall operation of the light receiving device 100 and the LED signboard A can automatically adjust the brightness according to the intensity of ambient light. a light receiving unit 104, and an LED brightness setting unit 106 for controlling the brightness of the LED module 12 installed on the LED display board (A) according to the ambient brightness sensed by the light receiving unit 104, and the light receiving unit 104 ), while controlling the luminous color of the LED module 12 installed on the LED signboard (A) according to the ambient brightness sensed by the , GPS that receives the location information where the LED color setting unit 108 and the LED signboard (A) are installed to automatically adjust the color according to the color of the building placed around it so that the brightness can be automatically adjusted during the day and at night. The receiver 110, the timer setting unit 112 for adjusting the time for which the light emission of the LED module 12 is maintained, and the manual setting unit 114 for manually operating the LED signboard (A) whose brightness is automatically adjusted ) is composed of
The remote control unit 116 is a wireless communication unit 118 for transmitting and receiving data between a plurality of installed LED billboards (A), and a plurality of LED billboards (A) share data transmitted and received through the wireless communication unit 118 together. Through the data sharing unit 120 and the road condition information shared through the data sharing unit 120 to enable It is composed of a road condition guide 122 that guides so as to prevent accidents by
The LED module 12 is divided and fixed in plurality on the seating frame 125 recessed in the rear side based on the front part of the real-time temperature guide plate 20, and the real-time temperature guide plate 20 has front and rear edges. A plurality of position adjustment holes 129 are formed at a distance spaced apart in the direction to be fixed at a selected position on the inner surface of the main body 10 provided outside the rim of the real-time temperature guide plate 20. LED signboard with built-in light receiving device function.
According to claim 1,
The real-time temperature guide plate 20 is further provided with a reference standard speed display unit 22 indicating the prescribed speed of the driving road 2 , and a real-time corresponding to the current road surface temperature t2 displayed on the second temperature display unit 25 . An LED signboard with a built-in light receiving device function, characterized in that the safety speed display unit 26 is further provided.
3. The method of claim 2,
When the temperature difference between the current temperature t1 and the current road surface temperature t2 is -2 to -5°C, the safety speed displayed on the real-time safe speed display unit 26 is the reference speed displayed on the reference regulation speed display unit 22. When the temperature difference is -6 to -10°C, the safe speed is reduced by 50-60% of the reference speed, and when the temperature difference is -11°C or more, the safe speed is 80% of the reference speed. An LED signboard with a built-in light receiving device, characterized in that it is configured to be displayed with a reduction of ~90%.
4. The method of claim 3,
An earthquake sensor 80 is provided inside the body 10, but the body 10 is formed in a rectangular shape when viewed from the front, and the earthquake sensor 80 is a rectangular body 10 LED signage with a built-in light receiving device, characterized in that it is configured to be provided inside each corner of the.
5. The method of claim 4,
The earthquake sensor 80 includes an elastic spring 82 attached to the inner surface of the main body 10 , an actuator 81 fixed to the upper end of the elastic spring 82 , and the actuator 81 . It is provided with two to four sensor plates 82 provided around the circumference, and is configured to measure the intensity of an earthquake according to the number and intensity of contact of the actuator 81 colliding on the sensor plate 82 due to earthquake or vibration. An LED signboard with a built-in light-receiving device function.
6. The method of claim 5,
A light receiving device function, characterized in that a general road guide part 30 is extended on the side of the real-time temperature guide plate 20 and an attachable road guide display plate 32 is provided on the general road guide part 30 This built-in LED signage.
7. The method of claim 6,
A snow load measuring device 50 for measuring the amount of snow on the driving road 2 is provided on the main body 10, and the snow load measuring device 50 is a measuring means arranged to scan a laser toward the road surface of the driving road 2 LED with built-in light receiving device function, characterized in that 52 is provided and configured to display the data measured through the snow load meter 50 on the snow load display unit 54 provided on the real-time temperature guide plate 20 billboard.
8. The method of claim 7,
The snow load measuring device 50 sets the road surface reference height h1 corresponding to the road surface of the driving road 2 through the measuring means 52, and then when the snow load occurs on the road surface of the driving road 2 An LED sign with a built-in light receiving device function, characterized in that by measuring the snow height (h2) in real time, the height difference between the snow height (h2) and the reference road surface height (h1) is configured to be displayed on the snow amount display unit (54).
9. The method of claim 8,
When the height difference between the snow height h2 and the reference road surface height h1 is 1 to 10 mm, the safety speed displayed on the real-time safe speed display unit 57 is 10 to 10 mm of the reference speed displayed on the reference standard speed display unit 22. When the height difference is 11 to 30 mm, the safe speed is reduced by 30 to 40% of the reference speed, and when the height difference is 31 to 50 mm, the safe speed is 50 to 60% of the reference speed. LED signboard with a built-in light receiving device function, characterized in that it is configured to be displayed such that the safety speed is reduced by 70 to 80% of the reference speed when the height difference is 51 mm or more.
delete According to claim 1,
The LED module 12 is divided and fixed in plurality on the seating frame 125 recessed in the rear side based on the front part of the real-time temperature guide plate 20, and the real-time temperature guide plate 20 has front and rear edges. Driving, characterized in that by forming a plurality of position adjustment holes 129 at a distance spaced apart in the direction to be fixed at a selected position on the inner surface of the main body 10 provided outside the rim of the real-time temperature guide plate 20 LED signage with built-in light receiver function including road.

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