KR102122548B1 - The pedestrian warning system generating visual alerts based on the distance of the adjacent roadway - Google Patents

Abstract

The present invention relates to a pedestrian warning system, measures the location of a pedestrian based on the signal strength (RSSI) of a Bluetooth beacon received on a pedestrian smartphone, generates a warning signal according to the pedestrian density, and emits a road sign to the driver. Pedestrian warnings can be issued.

Description

The pedestrian warning system generating visual alerts based on the distance of the adjacent roadway}

The present invention relates to a pedestrian warning system, and more specifically, a pedestrian warning that generates a visual warning based on the adjacent distance of a pedestrian's driveway that provides a visual pedestrian warning to a vehicle driver by detecting a pedestrian by using a beacon installed around the roadway. It's about the system.

According to statistics compiled from 2013, about 2,000 traffic accidents have occurred in the school zone prepared for traffic safety for children in the past 5 years, and 26 deaths and 2059 injuries have occurred in the accident. Became.

The school zone is set within 300m from the main entrance of the school and maintenance personnel, so you can install safety signs, speed meters, signals, etc., to stop cars or stop parking, and to limit children's speed to within 30km. This is a policy to protect.

The number of traffic accidents in school zone children by year recorded 427 cases in 2013, 523 cases in 2014, 541 cases in 2015, and 480 cases in 2016, although it decreased slightly in 2016, but children still face the risk of accidents within the school zone. .

Accordingly, there is a need for technology to secure the safety of pedestrians, including children, in sidewalks such as school zones and in side roads where sidewalks are not provided.

Korean Patent Publication No. 2011-0055326 (Application date: 2009.11.18)

The pedestrian warning system for generating a visual warning based on the distance adjacent to the roadway of a pedestrian of the present invention searches for a location of a pedestrian smartphone receiving a signal generated from a beacon installed around the roadway, and a driver around the pedestrian adjacent to the roadway The objective is to prevent the occurrence of pedestrian traffic accidents in advance by providing a visual warning.

A pedestrian warning system for generating a visual warning based on a pedestrian's road adjacent distance according to an embodiment of the present invention includes: a plurality of beacons that transmit signals for measuring a smartphone location of a pedestrian; By receiving the beacon signal information transmitted from the smartphone, tracking the pedestrian's location, extracting the high-risk smartphone, setting the warning level and warning zone for the high-risk smartphone, and setting the warning signal and warning zone for the warning level. A central control center that transmits information; Based on the warning signal of the central control center, a road sign bottle controller for emitting light control of the LED of the road sign bottle and a road sign bottle having LEDs that are controlled by the road sign bottle controller and emit flashing cycle, flashing time, luminance and multicolor light. It can contain.

Here, the plurality of beacons may include a group of beacons arranged on the same line and another group of beacons arranged to face the group of beacons.

In addition, beacons of the group of beacons and beacons of the other group of beacons may be arranged to face each other in a diagonal direction.

In addition, the smartphone receives a signal including the ID of the beacon from the plurality of beacons and measures the strength of the signal (RSSI) to transmit the RSSI information of the beacon ID and the plurality of beacons to the central control center. have.

In addition, the central control center includes a signal sampling unit, a database, a warning level setting unit, and a wireless communication unit, and the signal sampling unit selects beacons having the largest value among the plurality of beacon RSSIs, and the database is selected. RSSI information for comparison of similarity or identity with the RSSI of the beacon, but the database includes RSSI information for each coordinate including the coordinates of the virtual grid of the area where the plurality of beacons are installed and the RSSI measurement values of all beacons measured at the coordinates. , Roadway RSSI information including the coordinates of the roadway and the RSSI measurement value of the roadway coordinates, and roadmarker information including the ID and coordinates of the roadsignal, and the warning level setting unit according to the coordinate information of the plurality of smartphones Set the risk level in the order of proximity to, and set the warning zone and warning level in response to the risk level to select different warning signals per warning zone, and the wireless communication unit receives beacon RSSI information from the smartphone and receives the warning signal. Can be wirelessly transmitted to the road sign bottle controller.

In addition, the warning level setting unit may compare the distance between the smart phone and the roadway, set the risk level to High Level, Mid Level, or Low Level in the order close to the roadway and set a different warning signal corresponding to the risk level.

Further, among the warning signals, a high level signal may be a signal for emitting high-intensity flashing light of the LED of the road sign, a mid-level signal may be a light-emitting signal of the LED, and a low level signal may be a low-brightness light-emitting signal of the LED.

Further, among the warning signals, a high level signal may be a red flashing light emission signal of the LED of the road sign bottle, a mid level signal may be a yellow light emission signal, and a low level signal may be a green light emission signal.

In addition, the warning area may include a road sign bottle corresponding to a high level smartphone closest to the road and one road sign bottle in front and rear of the road sign bottle.

Pedestrian warning system according to an embodiment of the present invention precisely measures the position of a pedestrian walking around a roadway, sets a risk level for each pedestrian according to the roadway proximity of the pedestrian adjacent to the roadway, and has the highest risk By providing visual warnings to nearby vehicles, it is possible to promote safe driving for drivers and prevention of pedestrian traffic accidents.

1 and 2 are schematic diagrams of a pedestrian warning system according to an embodiment of the present invention;
3 is a schematic diagram of RSSI information of a plurality of beacons;
4 is a schematic diagram showing setting of a warning level based on location information of a central control center;
5 and 6 are schematic diagrams showing an example of the pedestrian warning system of this embodiment.

Advantages and features of the present invention, and methods for achieving them will be clarified with reference to embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the present embodiments allow the disclosure of the present invention to be complete, and the general knowledge in the technical field to which the present invention pertains. It is provided to fully inform the holder of the scope of the invention, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same components throughout the specification.

Thus, in some embodiments, well-known process steps, known structures, and known techniques are not specifically described in order to avoid obscuring the present invention.

The terminology used herein is for describing the embodiments and is not intended to limit the present invention. In the present specification, the singular form also includes the plural form unless otherwise specified in the phrase. As used herein, “comprises” and/or “comprising” is used in a sense that does not exclude the presence or addition of one or more other components, steps and/or actions other than the mentioned components, steps and/or actions. do. And, “and/or” includes each and every combination of one or more of the mentioned items.

In addition, the embodiments described herein will be described with reference to perspective views, sectional views, side views and/or schematic views, which are ideal exemplary views of the present invention. Therefore, the shape of the exemplary diagram may be modified by manufacturing technology and/or tolerance. Therefore, the embodiment of the present invention is not limited to the specific shape shown, but also includes a change in the shape generated according to the manufacturing process. In addition, in each drawing shown in the present invention, each component may be illustrated to be slightly enlarged or reduced in consideration of convenience of description.

Hereinafter, a pedestrian warning system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 5, a pedestrian warning system 100 for generating a visual warning based on a pedestrian's road adjacent distance according to a preferred embodiment of the present invention includes a plurality of beacons for measuring the location of a pedestrian ( 110), receives the beacon signal information transmitted from the smartphone 10 of the pedestrian, tracks the location of the pedestrian and calculates the danger level of the pedestrian, alerts the central control center 120 and the central control center 120 It may include a road sign bottle controller 140 for controlling the road sign bottle 130 on the basis of the road sign bottle 130 having a LED controlled by the controller 140 to emit light.

A plurality of beacons 110 may be installed in the vicinity of the sidewalk to measure the location of pedestrians and transmit signals in the direction of the roadway. Here, the plurality of beacons 110 may be installed on a wall of India, a floor of India, a street lamp or a road sign around India, and a group of beacons 110 are arranged on the same line as shown in FIG. 5. It is preferable, and it may be desirable to face the beacons 110 of different groups facing each other and are arranged to face each other in a diagonal direction. That is, the plurality of beacons 110 are arranged on the same line in one side of the sidewalk, and may be opposed to the beacon 110 of the other side of the sidewalk in a diagonal line based on the center line. Alternatively, the plurality of beacons 110 may be arranged to face each other based on the center line.

The beacon 110 of the present embodiment may periodically transmit a signal including the ID of the beacon, and transmit the signal to reduce the power consumption of the battery, which is the main power of the beacon 110, and increase the accuracy of distance measurement of the target. The power can be varied. To this end, the beacon 110 of this embodiment may be a Bluetooth beacon 110 that transmits a Bluetooth signal, and may use a BLE beacon 110 that can vary transmission power. In addition, a beacon 110 using other radio signals such as RF and ZigBee may be applied instead of the Bluetooth signal.

1 and 3, a signal transmitted from a plurality of beacons 110 may be received by a smartphone 10 equipped with a pedestrian, and the smartphone 10 may receive RSSI (reception of the received signal). Received Signal Strength Indication) may be transmitted to the central control center 120 together with the ID of the beacon. The smartphone 10 may transmit RSSI information based on the signals of all the beacons 110 received, and for this, a separate application may be installed on the smartphone 10.

The central control center 120 is intended to track and alert the location of a pedestrian by receiving RSSI signal information transmitted from the pedestrian's smartphone 10, and the central control center 120 is a beacon transmitted from the smartphone 10 The location of the pedestrian may be measured based on the ID of 110, the RSSI of the beacon 110, the signal reception time, and the smart phone ID.

Here, the location measurement of the pedestrian estimates the distance between the smartphone 10 and the closest three beacons 110 and the smartphone 10 based on the signal strength (RSSI), and based on this, the triangulation method and the trilateral measurement method It can be performed using.

Unlike this, when the beacon 110 is installed in the area where the beacon 110 is installed, a virtual grid is set in the corresponding area, and the signal strength of each beacon 110 is measured at the intersection of each grid to measure the database 122. After construction, a fingerprint technique may be used to estimate the location of a pedestrian through a search for the similarity or similarity between the measured RSSI measured from the smartphone 10 and the RSSI stored in the database 122.

In this embodiment, a technique for specifying the location of a pedestrian using a fingerprint technique is used, and for this purpose, as shown in FIGS. 2 and 4, the central control center 120 includes a signal sampling unit 121 and a database ( 122), a warning level setting unit 123 and a wireless communication unit 124.

The signal sampling unit 121 is for sampling only the RSSI to be used for searching for the sameness or similarity as the RSSI of the database 122 among the RSSI signal information transmitted from the smartphone 10, and the plurality of signals transmitted from one smartphone 10 Only the RSSI having the largest value among the RSSIs for the beacons 110 may be selected. In this embodiment, the three largest RSSIs were selected and used to search in the database 122, but the quantity of the selected RSSIs can be freely changed. As shown in FIG. 4, the signal sampling unit 121 selects RSSIs of three beacons 110 per one smartphone ID, and retrieves information of a database having the same or similarity to the measured RSSIs of the three beacons. can do. That is, as illustrated in FIG. 5, coordinate information including three measurement RSSIs can be searched, and as a result, coordinate information of the corresponding smart phone 10 and a road sign ID corresponding to the corresponding coordinates can be secured. .

As illustrated in FIGS. 4 to 6, the database 122 includes RSSI information for each coordinate, including coordinates of a virtual lattice in an area where the beacon 110 is installed, and RSSI measurement values of all beacons 110 measured at the coordinates. It may include (122a). The database 122 compares the three beacon IDs for the one smartphone 10 transmitted from the signal sampling unit 121 and its measured RSSI with the RSSI information of the stored beacon 110, and the corresponding smartphone 10 Coordinate information of the can be extracted, and the ID and coordinate information of the corresponding smart phone 10 and the road marker ID in the corresponding coordinate can be transmitted to the warning level setting unit 123.

In addition, the database 122 may store the roadway RSSI information 122b including the coordinates of the roadway and the RSSI at the corresponding coordinates so that the smartphone 10 of the pedestrian can be compared to the roadway. As an example, the database 122 may separately store and maintain the coordinates of the center line coordinates and the RSSI of the center line coordinates. As another example, the database 122 may store the coordinates of the roadway and the boundary of the sidewalk and the RSSI of the coordinates. Here, the center line coordinates and boundary coordinates may be used to calculate a roadway proximity between a pedestrian and a roadway. That is, the measured coordinates of the pedestrian smartphone and the center line coordinates closest to the smartphone (boundary coordinates), for example, the coordinates of the pedestrian smartphone and the center line coordinates (boundary coordinates) equal to the x or y-axis coordinates are measured. It is possible to calculate the distance between the pedestrians and the center line (border), through which the adjacent roads of the pedestrians can be calculated.

In addition, the database 122 may include road marker information 122c including coordinate information and ID of each of the road markers 130 installed on the road, and the ID of the road marker 130 is associated with the corresponding road marker 130 The warning information may be configured along with the given warning signal to be transmitted to the road sign controller 140 through the wireless communication unit 124.

The warning level setting unit 123 uses the coordinate information of the plurality of smartphones 10 to be transmitted and the coordinate information of the driveway to each smartphone from the closest smartphone 10 to the most distant smartphone 10. Risk setting unit (123a) for setting the risk for the, and a warning signal selection unit (123b) for setting a warning level based on the risk set by the risk setting unit (123a) and generating different warning signals according to the warning level and A warning zone setting unit 123c for setting a warning zone including a road marker corresponding to the location of the smartphone 10 having the highest risk on the virtual coordinates of the roadway and a proximity road marker in front and rear of the road marker may be included. .

The risk setting unit 123a compares the coordinate information of the plurality of smartphones 10 with the coordinate information of the roadway and may set the highest risk for the smartphone 10 that is closest to or moving toward the roadway. Here, when comparing the coordinate information of the smartphone 10 and the coordinate information of the driveway, it is determined that all the smartphones 10 are in a safe location because the positions of all the smartphones 10 are separated by a predetermined distance from the driveway coordinates. If possible, the risk may not be set for the smartphones (10). That is, even if the smartphone 10 closest to the roadway among the measured smartphones 10 is detected, the smartphone 10 exists in a safe location on the sidewalk (located at a distance from the roadway) or moves in the direction of the roadway If it is determined not to be, a normal or low risk may be set for the smartphone 10. In addition, the risk setting unit 123a may set a high level risk only for the smartphone 10 having the highest risk (smartphone closest to the roadway) among the plurality of smartphones 10. That is, in this embodiment, only one smartphone 10 having a high level risk may be selected, and the mid and low level risks may be set to a plurality of smartphones.

In this embodiment, the warning zone setting unit 123c includes a road marker corresponding to the smartphone 10 having the highest risk (High Level) and a road marker located in front and rear of the road marker. Although set, unlike this, the warning zone can be set including two road markers at the front and rear.

As illustrated in FIG. 6, a risk of the highest high level may be set in the smartphone 10 closest to the roadway among the plurality of smartphones 10, and a warning signal selection unit for this high level risk ( In 123b), a warning signal corresponding to High Level is selected, and a warning zone may be set in front/rear of the smartphone 10.

In this embodiment, all three warning levels have been set. In the High Level, a warning signal is emitted to flash the corresponding road sign with high luminance, and in the Mid Level, an emission signal has been set, and for the Low Level, a low luminance emission signal can be set. have.

That is, the road marker at the location where the smartphone closest to the roadway is present, the road marker at the front of the road marker, and the road marker at the rear can emit high-brightness light from the built-in LED and blink at high frequency. In this embodiment, the warning level is divided into flashing light emission/light emission/low brightness light emission, but the light emission signal according to the warning level is changed in various ways such as color change, flashing cycle change, and luminance change of the LED embedded in the road sign bottle 130. Can be set.

For example, the high level signal is a red flashing light emission signal of the LED, the mid level signal is a yellow light emission signal, and the low level signal may be used as a green light emission signal.

On the other hand, the warning zone setting unit 123c of the present embodiment set a warning zone including a road sign bottle corresponding to a high-level smartphone having the highest risk and one road sign bottle in front and rear, respectively. Warning zones can also be set up, including individual road signs. In addition, in this embodiment, only the road markers in the warning zone corresponding to the high-level smartphones are light-emittingly controlled, but on the other hand, the road markers corresponding to the smartphones from the high level to the low level according to the priority of the risk are different for each level. Light emission control can be performed.

As described above, the central control center 120 of this embodiment tracks the location (coordinates) of the smartphone 10 based on the RSSI of the beacon 110 measured in the smartphone 10, and a plurality of smartphones By comparing the coordinates of (10) with the coordinates of the driveway, according to the degree of proximity to the driveway, the risks can be set by differentiating the smartphones 10, and a warning signal corresponding to the risk can be set, and the highest high level smart By setting a warning area for emitting a road sign bottle on which the phone 10 is located and adjacent road sign bottles located at the front and rear sides of the road sign bottle, warning information including the road sign ID and warning signal of the warning area can be transmitted to the wireless communication unit 124. have.

The wireless communication unit 124 may include a transmission/reception unit that receives RSSI information transmitted from the smartphone 10 and transmits warning information according to the warning level to the road signage controller 140. In this embodiment, the RSSI information is received and the warning signal is transmitted using commercial wireless communication such as LTE, but the central control center 120 is disposed near the area where the beacon 110 is installed, and known Zigbee, RF, etc. It is also possible to transmit and receive information through communication.

The road sign bottle controller 140 is for controlling the road sign bottle 130 based on the warning information transmitted from the central control center 120, and may perform data communication with the road sign bottle 130 by wire or wireless. Referring to FIG. 6, the road sign bottle controller 140 emits and controls the LED of the road sign bottle 130 according to the warning signal based on the warning area (illuminated road sign bottle) of the central control center 120. You can control the flashing period, flashing time, luminance, LED color, etc.

The road sign bottle 130 is for providing a visual warning to the driver, and may be installed buried in the roadway, and may include a communication module communicating with the road sign controller 140 and one or more LED light emitting modules therein. . Here, the road sign bottle 130 may be supplied with power through a power line, but may be provided with a separate power source through a built-in battery.

The embodiments of the present invention have been described above, but those skilled in the art can add, change, delete or add components within the scope of the present invention as described in the claims. By this, the present invention will be variously modified and changed, and it will be said that it is also included within the scope of the present invention.

10: pedestrian smartphone
100: pedestrian warning system
110: Bluetooth beacon
120: Central Control Center
130: road sign disease
140: road sign controller

Claims (9)

A plurality of beacons that transmit signals for measuring the location of a pedestrian's smartphone;
Receiving beacon signal information transmitted from the smartphone, tracking the location of pedestrians, extracting high-risk smartphones, setting warning zones and warning levels for the high-risk smartphones, warning signals and warnings for the warning zones A central control center that transmits information of the zone;
A road sign bottle controller for emitting and controlling the LED of the road sign bottle based on the warning signal from the central control center; And
Included by the road sign bottle controller is controlled by the flashing cycle, flashing time, luminance and multi-color light emitting LED having a road sign bottle,
The smartphone receives a signal including the beacon ID from the plurality of beacons, measures the strength of the signal (RSSI), and transmits the beacon ID and RSSI information of the plurality of beacons to the central control center,
The central control center receives the RSSI signal information transmitted from the pedestrian's smartphone to track and alert the pedestrian's location, the ID of the beacon transmitted from the smartphone, the RSSI of the beacon, the signal reception time and smart The location of the pedestrian is measured based on the phone ID, and the location of the pedestrian is measured between the three beacons closest to the smartphone and the smartphone using triangulation or triangulation based on signal strength (RSSI). When estimating a distance or installing a beacon in an area where a plurality of beacons are installed, a virtual grid is set in a corresponding area, and the signal strength of each beacon is measured at the intersection of each grid to build a database and then a fingerprint technique Pedestrian position is estimated by searching for the sameness or similarity between the three measured RSSIs measured from the smartphone and the RSSIs stored in the database,
The central control center includes a signal sampling unit for selecting three beacons in order of the largest value among the RSSIs of the plurality of beacons, and RSSI information for comparing similarity or identity with the RSSI of the selected three beacons. RSSI information for each coordinate including the coordinates of the virtual lattice in the area where a plurality of beacons are installed and RSSI measurement values of all beacons measured at the coordinates, roadway RSSI information including the coordinates of the roadway and the RSSI measurement of the roadway coordinates, and the road A database including road marker information including the ID and coordinates of a sign bottle, and a risk level is set in an order close to the roadway based on the coordinate information of a plurality of smartphones. A warning level setting unit for selecting different warning signals per warning zone, and a wireless communication unit for receiving beacon RSSI information from the smartphone and wirelessly transmitting the warning signal to the road marker controller,
The warning level setting unit, by using the coordinate information of the plurality of smartphones delivered and the coordinates of the driveway, the risk setting unit for setting the risk for each smartphone from the closest smartphone to the farthest smartphone, A road corresponding to the location of the smartphone having the highest risk on the virtual coordinates of the roadway, and a warning signal selector for setting a warning level based on the risk set by the risk setting unit and generating a different warning signal according to the warning level It comprises a warning zone setting unit for setting a warning zone including a road sign bottle and a road sign bottle in front and rear of the road sign bottle,
The risk setting unit compares the coordinate information of the plurality of smartphones with the coordinate information of the driveway to set the highest risk for the smartphone that is closest to or moving toward the driveway, and the coordinate information and the driveway of the plurality of smartphones When comparing the coordinate information of, if the location of all smartphones is separated by a certain distance from the coordinates of the roadway, and it is determined that all smartphones exist in a safe location, the risk is not set for the smartphones, and among the multiple smartphones Set the High Level risk only for the smartphone with the highest risk, the smartphone closest to the driveway,
The warning level setting unit compares the distance between the smart phone and the roadway, sets the risk level to High Level, Mid Level or Low Level in the order close to the roadway and sets different warning signals in response to the risk level.
Among the warning signals, a high level signal is a high-brightness flashing light emission signal or a red flashing light emission signal for the LED of the road sign bottle, a mid level signal is a light emission signal or a yellow light emission signal of the LED, and a low level signal is a low brightness light emission of the LED Is a signal or a green luminous signal,
The warning area includes a road sign bottle corresponding to a high level smartphone closest to the driveway and one road sign bottle in front and rear of the road sign bottle,
The plurality of beacons includes a group of beacons arranged on the same line and another group of beacons arranged opposite to the group of beacons, and the beacons of the group of beacons and the beacons of the group of beacons are arranged in a diagonal direction A pedestrian warning system that generates a visual warning based on the distance adjacent to a pedestrian's driveway, which is arranged to face each other. delete delete delete delete delete delete delete delete

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