KR102497850B1 - System for controlling led vms based on artificial intelligence for visibility - Google Patents

Abstract

Disclosed is an artificial intelligence LED electronic display board control system for visibility, which includes: an electronic display board (100) which outputs traffic information using a light source; a sensor unit (200) composed of a plurality of vehicle detection sensors for detecting vehicles by section; and a control unit (390) which performs dimming control of the light source using the vehicle information obtained through the sensor unit, sets the color of the light source in response to the traffic information for each situation, and sets the color change of the light source in response to weather conditions.

Description

Artificial intelligence LED display board control system for visibility {SYSTEM FOR CONTROLLING LED VMS BASED ON ARTIFICIAL INTELLIGENCE FOR VISIBILITY}

The present invention relates to an artificial intelligence LED signboard control system for visibility that changes the color of a light source of an electric signboard to a color with high visibility when bad weather conditions occur.

<About dimming control>

Conventionally, power consumed in lighting is reduced through dimming control. Patent Document 1 relates to a dimming control system for IoT-based LED street lights and security lights, and adjusts the brightness of lighting devices in response to changes in ambient illumination.

LED, a light emitting device, is used as a device that emits light in lighting equipment, is used as a device that displays information by displaying letters or symbols in signs, and is used as a device that provides situation propagation in warning lights. In particular, the LED display board (VMS: Variable Message Sign) used in road traffic can provide both information display and situation propagation functions.

Since the electronic display board must provide information during the day or night unlike lighting equipment, dimming control technology has not been applied to the electronic display board in the related art. However, in the prior art, even when there is no vehicle traffic, such as late at night, the high output of the signboard is maintained, resulting in power loss of the signboard.

<About the operation of the electronic display board in case of bad weather>

Conventionally, when bad weather occurs, visibility is secured by adjusting the brightness of lighting devices installed on the road. Patent Document 2 relates to a fog warning system, and adjusts the brightness of the fog line guidance lamp in response to the amount of fog.

However, in the prior art, there is a problem in that it is difficult to improve visibility only by adjusting the brightness of a light source of a lighting device or an electronic display board, and technology development for improving visibility by changing the color of the light source for each bad weather condition is insufficient.

<About sensors for traffic demand survey>

Conventionally, a vehicle is detected using various sensors capable of detecting a vehicle, such as an optical sensor, a loop sensor, or a piezo sensor, and a traffic demand survey is provided by counting information detected by the vehicle. Patent Document 3 relates to a vehicle information detection system and a vehicle information detection method, and provides a traffic demand survey using a sensor for detecting a vehicle.

However, in the prior art, a sensor for detecting a vehicle is used only for the purpose of traffic demand survey, so there is a problem of low sensor utilization, and it is necessary to develop technology for use for other complex purposes other than traffic demand survey.

Korean Patent Registration No. 10-2060572 Korean Patent Registration No. 10-1825083 Korean Patent Publication No. 10-2015-0081942

In order to solve the above problems, the present invention improves visibility by changing the color of the light source for each bad weather condition, and when the set dimming control condition and bad weather condition are applied, artificial intelligence that controls the dimming of the light source, font size and color together. Provides an LED display board control system.

An artificial intelligence LED signboard control system for visibility according to an embodiment of the present invention for the above object to be solved includes an electric signboard 100 that outputs traffic information using a light source; The dimming control of the light source is performed using the sensor unit 200 for detecting the distance between the electric signboard and the vehicle and the vehicle information obtained through the sensor unit, and the color and light source of the light source are expressed in response to traffic information for each situation. Including a controller 390 that controls the font size and changes the color of the light source in response to weather conditions, the controller controls dimming of the light source, font size, and color artificially in response to vehicle information and weather information. It is characterized by doing.

The control unit stores a control value for adjusting the brightness of the display board, compares and learns the detection value of the sensor unit with the control value, and controls the dimming of the light source and the font size together based on the distance between the display board and the vehicle. there is.

The sensor unit may further include an optical sensor that monitors the electronic display board, and the control unit may detect defective dots on the electronic display board by comparing the set reference light source brightness pattern and the measured light source brightness pattern measured using the optical sensor. .

The control unit may store a reference light source brightness pattern by learning a wavelength value of a light source brightness pattern corresponding to a weather state.

The controller stores a reference value for the current value of the output pattern displayed on the display board, and compares the current value of the output pattern measured at each set period with the reference value to detect defective dots on the display board.

The electronic display board is implemented in the form of a dot matrix with light emitting devices in the form of dots, and is implemented in the form of a dot matrix composed of a plurality of dots. The dots are turned on and off in response to traffic information for each situation, and the control unit responds to the traffic information for each situation. It may be characterized by setting the output of standard symbols and non-standard symbols related to fonts, and determining whether standard symbols can be used by analyzing available dot areas when defective dots occur.

The control unit may select a non-standard symbol corresponding to an available dot area from among a plurality of non-standard symbols when a restriction on the use of standard symbols occurs.

The standard symbols have the same or larger dot usage area than the non-standard symbols, and are divided into general type and enlarged type in response to weather conditions, and the non-standard symbols are formed in plurality according to the location and number of defective dots compared to the dot matrix. can

According to the present invention, when the set dimming control conditions and bad weather conditions are applied, the dimming of the light source, the font size, and the color are controlled together, thereby further improving the visibility of the electric signboard display, and improving the visibility to induce safe driving of the driver. can

1 is a block diagram showing an artificial intelligence LED display board control system according to an embodiment of the present invention.
FIG. 2 is a block diagram showing the LED display board control system of FIG. 1 in detail.
3 is an example of dimming control for a light source of an electronic display board.
4 is an example showing the visibility distance according to the blood of the electric signboard.
5 is an example showing standard symbols of a general type and an enlarged type.
6 is an example of changing the color of the light source of the electronic display board.
7 illustrates an example in which non-standard symbols vary according to locations where defective dots occur.

In the following, various embodiments and/or aspects are disclosed with reference now to the drawings. In the following description, for purposes of explanation, numerous specific details are set forth in order to facilitate a general understanding of one or more aspects. However, it will also be appreciated by those skilled in the art that such aspect(s) may be practiced without these specific details. The following description and accompanying drawings describe in detail certain illustrative aspects of one or more aspects. However, these aspects are exemplary and some of the various methods in principle of the various aspects may be used, and the described descriptions are intended to include all such aspects and their equivalents.

References to “embodiment,” “example,” “aspect,” “example,” etc., used in this specification should not be construed as indicating that any aspect or design described is preferable to or advantageous over other aspects or designs. .

Also, the terms "comprises" and/or "comprising" mean that the feature and/or element is present, but excludes the presence or addition of one or more other features, elements and/or groups thereof. It should be understood that it does not.

In addition, terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. These terms are only used for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention. The terms and/or include any combination of a plurality of related recited items or any of a plurality of related recited items.

In addition, in the embodiments of the present invention, unless otherwise defined, all terms used herein, including technical or scientific terms, are those commonly understood by those of ordinary skill in the art to which the present invention belongs. have the same meaning. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the embodiments of the present invention, an ideal or excessively formal meaning not be interpreted as

1 is a block diagram showing an artificial intelligence LED signboard control system according to an embodiment of the present invention, wherein the LED signboard control system 10 includes an electronic signboard 100, a sensor unit 200 and a control device 300. do.

The electronic display board 100 has light emitting elements implemented in the form of dots and implemented in the form of a dot matrix composed of a plurality of dots, and the dots can be turned on or off in response to traffic information for each situation. The electronic display board 100 is installed on a highway or an automobile-only road, and can output traffic information using a light emitting device-based light source. Traffic information is information necessary for driving.

The sensor unit 200 generates a comparison value for controlling the operation of the display board 100, and the control device 300 stores a reference value for comparison with the comparison value.

The control device 300 is applied with artificial intelligence (AI) technology based on machine learning, and controls the operation of the electronic display board 100 by comparing a reference value with a comparison value.

Artificial intelligence is a technical field that aims to realize the ability to solve problems based on human experience and knowledge, the ability to perceive visual and voice recognition, the ability to understand natural language, and the ability to move autonomously with computer or electronic technology. It is the realization of human thinking and learning ability as a computer program. The ultimate goal of artificial intelligence is to develop machines that can think and act like humans.

Machine learning is one of the research fields of artificial intelligence, and it is a technology that aims to realize functions such as human learning ability. Machine learning is divided into supervised learning and unsupervised learning. Supervised learning is a method of finding an output value corresponding to a learner's input value by referring to learning data, while unsupervised learning finds a regularity of input values using training data with only input values, and outputs the found result to the learner. to provide. The present invention can control the operation of the electronic display board 100 based on supervised learning.

FIG. 2 is a block diagram showing the LED signboard control system of FIG. 1 in detail, and the control device 300 includes a communication unit 310 and a control unit 390. The communication unit 310 may be connected by wire for communication with the sensor unit 200 or may be connected to a short-distance network such as Zigbee.

The artificial intelligence LED display board control system 10 may further include a management server 400 and a manager terminal 500. The management server 400 can integrally manage the display board 100, the sensor unit 200, and the control device 300, provide a remote control function, and monitor abnormal operation of the sensor unit 200. can

The manager terminal 500 is a terminal used by the manager and may be a representative smart phone, and may receive a notification regarding a control function or an abnormal operation of the management server 400 . A smartphone is a mobile terminal equipped with a mobile operating system like a personal computer (PC) and capable of using various applications and contents.

The communication unit 310 may perform communication with the management server 400 or the manager terminal 500 using a long-distance network such as LTE or LAN.

The sensor unit 200 includes a plurality of vehicle detection sensors 220-1, 220-2, and 220-3. The plurality of vehicle detection sensors 220-1, 220-2, and 220-3 are sensors for detecting vehicles and may be optical sensors, loop sensors, piezo sensors, ultrasonic sensors, electromagnetic induction sensors, or proximity sensors, and are limited thereto. I never do that.

In the present invention, the plurality of vehicle detection sensors 220-1, 220-2, and 220-3 include a first vehicle detection sensor 220-1, a second vehicle detection sensor 220-2, and a third vehicle detection sensor ( 220-3), but the number of sensors may be changed in response to the road environment, but is not limited thereto.

The first vehicle detection sensor 220-1 means a vehicle detection sensor in the first section located closest to the signboard, and the third vehicle detection sensor 220-3 means a vehicle detection sensor in the last section located farthest from the signboard. And, the second vehicle detection sensor 220-2 means a vehicle detection sensor in the middle section located between the vehicle detection sensor in the first section and the vehicle detection sensor in the last section.

The plurality of vehicle detection sensors 220-1, 220-2, and 220-3 may be devices having the same detection method or may be different devices, but are not limited thereto. For example, the first vehicle detection sensor 220-1 may be an optical sensor such as a camera if it is used for proximity to a toll gate location or traffic demand survey, and the second vehicle detection sensor 220-2 or the third vehicle The detection sensor 220-3 may be a loop sensor or a piezo sensor.

The control device 300 may be manufactured integrally with or separated from the display board 100, and may be manufactured including some sensors of the sensor unit 200. For example, the control device 300 is manufactured to include the first vehicle detection sensor 220-1.

FIG. 3 shows an example of dimming control of the light source of the electronic display board, and the controller 390 artificially performs dimming control of the light source using vehicle information about the detection time and non-detection time of the vehicle. Vehicle information is used for dimming control of light source, traffic demand survey, and determination of malfunction of vehicle detection sensor.

The control unit 390 stores distance values between the plurality of vehicle detection sensors 220-1, 220-2, and 220-3 and obtains information about the detection time and non-detection time of the vehicle. speed can be predicted.

The controller 390 performs dimming control of the light source based on the predicted speed, and compares whether or not a vehicle is detected by the plurality of vehicle detection sensors 220-1, 220-2, and 220-3 to determine the state of the vehicle detection sensor. and information on the traffic demand survey may be generated using at least one vehicle detection sensor.

The present invention uses a plurality of vehicle detection sensors (220-1, 220-2, 220-3) to control dimming of light sources, survey traffic demand, and determine whether or not a sensor malfunctions, thereby improving the utilization value of sensors. can

The present invention can reduce the power consumption of the electric signboard by using the vehicle detection sensor, inform the traffic situation by time zone according to the traffic demand survey, detect the malfunctioning sensor at an early stage and drive the replaceable sensor or quickly Maintenance can be provided, and stable operation of the system can be guaranteed.

Dimming control, which is a brightness control element of the electronic display board 100, can be PWM control, can control the brightness according to the distance of the vehicle, can control the brightness according to the speed of the vehicle using the time for each section, and can control the brightness according to the vehicle speed. Brightness control can be provided. The electronic display board 100 may emit a light source by charging a battery using a solar cell.

The dimming control includes the first through fourth dimming controls. The first dimming control detects the entry of the first vehicle using the vehicle detection sensor 220-1 of the first section located closest to the signboard 100, and detects the entry of the first vehicle from the signboard 100 before the point of entry of the first vehicle. When the entry of the second vehicle is detected using the vehicle detection sensor 220-3 of the far end section, it is maintained as a high-output light source. Since the first dimming control is a situation in which a vehicle continuously passes, it is possible to maintain a high-output light source.

In the second dimming control, if the entry of the second vehicle is not detected by the vehicle detection sensor 220-3 in the end section at the time of entry of the first vehicle, control is performed with a light source of lower power than the high output, and at the set standby time, the end section When the entry of the second vehicle is not detected by the vehicle detection sensor 220-3, the output of the light source is turned off. The second dimming control can turn off the output of the light source before the set waiting time, but when the second vehicle enters during the waiting time, power consumption for the state transition from the off state to the on state may further increase. , the output is kept in a reduced state only during the standby time.

In the third dimming control, the vehicle detection sensor 220-3 of the last section does not detect the entry of the second vehicle, and the vehicle detection sensor 220-1 of the first section and the vehicle detection sensor 220-3 of the last section ), when the second vehicle is detected by the vehicle detection sensor 220-2 in the middle section located between ), it is controlled with a high-output light source.

In the fourth dimming control, when the vehicle detection sensor 220-3 in the end section detects the entry of the second vehicle and the vehicle detection sensor 220-2 in the middle section does not detect the second vehicle, a high-output light source is used. Control.

Since the third dimming control or the fourth dimming control requires time to determine which vehicle detection sensor is malfunctioning, the present invention controls with a high-output light source under the premise that the vehicle passes, and when the discrimination result is obtained, according to the discrimination result Dimming control can be provided.

When operating under the third dimming control or the fourth dimming control, the control unit 390 compares the presence or absence of detection of each vehicle detection sensor to determine a malfunctioning vehicle detection sensor, and accumulates sensor state information about the state of the vehicle detection sensor. You can determine whether or not it is a temporary malfunction by referring to

The controller 390 may accumulate sensor state information about the state of the sensor in order to determine whether the sensor is a temporary malfunction or a malfunction close to an actual malfunction.

The controller may deactivate vehicle detection sensors that malfunction a set number of times, activate extra vehicle detection sensors, and reset the distance between activated vehicle detection sensors to predict the location and speed of the vehicle. The present invention can ensure stable operation of the system through activation and deactivation of the vehicle detection sensor.

4 is an example of the visibility distance according to the number of screens of the electronic signboard, and the optimal viewing angle area may be leaked by the size of the module of the electronic signboard 100. For example, when the pitch of the display board 100 module is 6 mm, a distance of about 6 to 18 m is the optimal distance, and the optimal viewing angle is inferred as shown in FIG. 4 according to the pitch of the display board 100. can do.

The sensor unit 200 may further include a weather sensor 210 . The controller 390 may obtain weather information through the weather sensor 210 or a weather agency server (not shown). Weather information may include weather information and ambient illumination information.

The control unit 390 performs dimming control of the light source using the vehicle information obtained through the sensor unit 200, sets the color of the light source in response to traffic information for each situation, and changes the color of the light source in response to weather conditions. set The controller 390 artificially controls the dimming and color of the light source in response to vehicle information and weather information.

Traffic information may vary according to various purposes or circumstances, such as general weather, bad weather, prevention of drowsiness, highway usage fee information, etc., and the electronic display board 100 may output traffic information suitable for the purpose or situation.

The controller 390 performs dimming control of the light source based on the distance between the electronic display board 100 and the vehicle, and controls both the dimming and color of the light source when the set dimming control condition and bad weather conditions are applied.

The dimming control condition may include a condition related to ambient illumination whether it is day or night and a condition related to whether or not a vehicle is detected or not detected.

The bad weather condition may include various conditions related to bad weather such as rain, snow, fog, and lightning, and may include various conditions according to the degree of bad weather.

Visibility of color is the lowest in light green, and increases in order of red, blue, orange, green, and yellow.

Conventionally, if the degree of bad weather is very weak, it can be represented by yellow green or green, if the degree of bad weather is moderate, by orange, and if the degree of bad weather is very severe, it can be represented by red.

However, conventionally, when the amount of fog is very severe, the danger of fog is displayed on the electronic signboard 100 in red letters, but the driver has a problem in that it is difficult to find out the information of the electronic signboard 100 because the visibility of the red color is very low. The present invention can greatly increase visibility by displaying the danger of fog in yellow letters instead of red.

5 is an example of standard symbols of normal type and enlarged type, and the control unit 390 can set the output of standard symbols and non-standard symbols in response to traffic information in each situation, and analyze available dot areas when a bad dot occurs Thus, it is possible to determine whether the use of standard symbols is possible.

The control unit 390 may select a non-standard symbol corresponding to an available dot area from among a plurality of non-standard symbols when a restriction on the use of standard symbols occurs.

Standard symbols have the same or larger dot usage area than non-standard symbols, and as shown in FIG. 5, they can be divided into general type and enlarged type in response to weather conditions.

6 is an example of changing the color of the light source of the electronic signboard, and the electronic signboard 100 outputs the phrase “Please go slowly” in red as shown in FIG. 5 to recognize a high-pass terminal near a toll gate in normal times. In addition, when bad weather such as fog is very severe, as shown in FIG. 6, the number of output LEDs may be increased and red may be output as yellow to improve visibility.

FIG. 7 shows an example in which non-standard symbols are changed according to positions where defective dots are generated, and a plurality of non-standard symbols may be formed according to the position and number of defective dots compared to a dot matrix. For example, as shown in FIG. 7, the non-standard symbol may have a different wording or shape depending on the location and number of dot defects.

The control unit 390 determines whether the standard symbols of the general type can be used when restrictions on the use of the standard symbols of the enlarged type occur due to defective dots, and if the restrictions on the use of the standard symbols of the general type occur, by selecting a non-standard symbol , it is possible to provide step-by-step operations corresponding to the number and location of defective dots.

The control unit 390 may generate repair request information including the location and number of defective dots when restrictions on the use of some non-standard symbols may occur due to an increase in the number of defective dots, and the manager may perform maintenance and maintenance by referring to the repair request information. can be performed.

The controller 390 performs dimming control of the light source using vehicle information obtained through the sensor unit, controls the color of the light source and the font size expressed by the light source in response to traffic information for each situation, and controls the light source in response to weather conditions. change the color of

The controller 390 artificially controls dimming of the light source, font size, and color in response to vehicle information and weather information. Fonts include letters and special characters, and can be expressed with standard symbols and non-standard symbols.

The control unit 390 stores the optimal control value for adjusting the brightness of the electronic display board 100, compares and learns the detection value of the sensor unit 200 with the control value, and based on the distance between the electronic display board 100 and the vehicle, the light source You can control dimming and font size together.

The sensor unit 200 may further include an optical sensor (not shown) that monitors the display board 100, and the controller 390 compares the set reference light source brightness pattern with the measured light source brightness pattern measured using the optical sensor. Thus, defective dots of the electronic display board 100 can be detected. The light source brightness pattern is a brightness pattern for representing traffic information, and can be classified according to traffic information for each situation.

Since the brightness of the light source displayed may vary depending on the weather condition, the controller 390 may learn the wavelength value of the light source brightness pattern corresponding to the weather condition and store the reference light source brightness pattern.

The present invention, as an artificial intelligence type, changes the size of the letters of the electronic signboard 100 according to the distance of the vehicle in order to maximize the effect of the signboard in situations of change in weather conditions, such as fog, fine dust, rain, etc. and at the same time control the brightness of the light source.

The present invention is to distinguish fine dust, fog, etc. by changing the color of a light source used in the sensor unit 200 in order to grasp the situation of meteorological conditions such as fine dust, fog and rain.

More specifically, in the case of fog, the closer the wavelength of yellow color is, the better the transmittance of the present invention can be used, and in the case of fine dust, the wavelength of red color can be used to make it visible even if light is scattered.

According to the present invention, the color of the text on the electric signboard can be determined using the sensing result, and the size of the text can be changed according to the distance of the vehicle.

A method for detecting defective dots on the display board 100 is to display a specific pattern on the display of the display board 100 for a very short time, memorize the current value at this time, generate the same pattern again, and detect a change in current. I would like to check whether the electronic display board (100) is defective or not.

More specifically, the controller 390 may store a reference value for the current value of the output pattern displayed on the display board, and compare the current value of the output pattern measured at each set period with the reference value to detect defective dots on the display board.

10: LED display board control system 100: display board
200: sensor unit 210: weather sensor
220-1: first vehicle detection sensor 220-2: second vehicle detection sensor
220-3: Third vehicle detection sensor 300: Control device
310: communication unit 390: control unit
400: management server 500: manager terminal

Claims (8)

An electronic display board 100 that outputs traffic information using a light source;
A sensor unit 200 for detecting the distance between the electric signboard and the vehicle, and
The dimming control of the light source is performed using the vehicle information obtained through the sensor unit, the color of the light source and the font size expressed by the light source are controlled in response to traffic information for each situation, and the color of the light source is changed in response to weather conditions. Including a controller 390 that controls the dimming of the light source, the font size and color together artificially in response to vehicle information and weather information,
The sensor unit includes a plurality of vehicle detection sensors for detecting a vehicle for each section,
The dimming control,
The entry of the first vehicle is detected using the vehicle detection sensor of the first section located closest to the signboard, and the vehicle detection sensor of the last section located farthest from the signboard is used to detect the entry of the first vehicle before the point of entry of the first vehicle. A first dimming control to maintain a high-output light source upon detection of entry;
If the entry of the second vehicle is not detected by the vehicle detection sensor of the end section at the time of entry of the first vehicle, control is performed with a light source of lower power than the high output, and the entry of the second vehicle is performed by the vehicle detection sensor of the end section at the set waiting time. a second dimming control to turn off the output of the light source when ? is not detected;
When the vehicle detection sensor in the end section does not detect the entry of the second vehicle and the vehicle detection sensor in the middle section between the vehicle detection sensor in the first section and the vehicle detection sensor in the end section detects the second vehicle, high output A third dimming control controlled by a light source of
The vehicle detection sensor in the end section detects the entry of the second vehicle and the vehicle detection sensor in the middle section does not detect the second vehicle, and the fourth dimming control is controlled with a high-power light source. Artificial intelligence LED display control system for According to claim 1,
The control unit stores a control value for adjusting the brightness of the display board, compares and learns the detection value of the sensor unit and the control value, and controls the dimming of the light source and the font size together based on the distance between the display board and the vehicle. Artificial intelligence LED signboard control system for According to claim 1,
The sensor unit further includes an optical sensor for monitoring the electronic display board,
The control unit compares the set reference light source brightness pattern and the measured light source brightness pattern measured using an optical sensor to detect defective dots of the electronic signboard. According to claim 3,
The control unit learns the wavelength value of the light source brightness pattern corresponding to the weather condition and stores the reference light source brightness pattern. According to claim 1,
The control unit stores a reference value for the current value of the output pattern displayed on the display board, and compares the current value of the output pattern measured at each set period with the reference value to detect defective dots on the display board. LED display board control system. According to claim 1,
The electronic signboard is implemented in the form of a dot matrix with light emitting devices in the form of dots, and is implemented in the form of a dot matrix composed of a plurality of dots, turns on and off the dots in response to traffic information for each situation,
The control unit sets the output of standard symbols and non-standard symbols related to fonts in response to traffic information in each situation, and determines whether standard symbols can be used by analyzing available dot areas when defective dots occur For visibility, characterized in that Artificial intelligence LED display board control system. According to claim 6,
The control unit selects a non-standard symbol corresponding to an available dot area from among a plurality of non-standard symbols when a restriction on the use of standard symbols occurs. According to claim 6,
The standard symbol has the same or larger dot usage area than the non-standard symbol, and is divided into general type and enlarged type in response to weather conditions,
The artificial intelligence LED display board control system for visibility, characterized in that the non-standard symbols are formed in plurality according to the position and number of defective dots compared to the dot matrix.

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