KR102595906B1 - Signaling device for safe crossing and operating method thereof - Google Patents

Abstract

The present invention discloses a safety crossing signal and a method of operating the same. The safe crossing signal includes a pedestrian detection sensor that detects pedestrians near the crosswalk and generates first pedestrian detection data, and a vehicle sensor that generates first vehicle detection data by detecting the location and speed of a vehicle approaching the crosswalk. A sensor unit including a sensor, determines a first crosswalk state for the crosswalk based on the first pedestrian detection data and the first vehicle detection data, and outputs the first crosswalk state to the pedestrian based on the first crosswalk state. A pedestrian output signal that generates a vehicle output signal that is output to the vehicle, a determination unit that determines whether an event occurs between the vehicle and the pedestrian and generates an event occurrence signal, and the pedestrian output signal is visualized with icons and text. An output unit including a first display that outputs the vehicle output signal and a second display that visualizes and outputs the vehicle output signal as icons and characters, and when the event occurrence signal is generated, the first pedestrian detection data from the sensor unit It includes a communication unit that receives vehicle event data according to the time of occurrence of the event among pedestrian event data and the first vehicle detection data according to the time of occurrence of the event and transmits it to a server, and a video unit that takes pictures of the vicinity of the crosswalk, wherein the event includes at least one of a collision risk situation and a collision situation between the pedestrian and the vehicle, and the video unit transmits video event data according to the time of occurrence of the event to the communication unit.

Description

Signaling device for safe crossing and operating method thereof}

The present invention relates to a safety crossing signal and a method of operating the same. Specifically, the present invention relates to a safety crossing signal using a pedestrian detection sensor and a vehicle detection sensor and a method of operating the same.

As transportation methods develop and roads become more complex, traffic accidents are also increasing. In particular, because the paths of vehicles and pedestrians intersect at crosswalks, traffic lights are used to control the passage of vehicles and pedestrians at crosswalks with a high risk of accidents.

However, drivers of vehicles turning right at intersections where right turns are possible often find it difficult to check crosswalk signals due to blind spots and the risk of collision with vehicles traveling straight on the left. Drivers of cars going straight as well as right-turning vehicles may rush into the crosswalk near the end of the crosswalk signal due to pedestrians being obscured by vehicles or obstacles on the left or right, or check for pedestrians remaining in the crosswalk or roadway even after the crosswalk signal has expired. There is difficulty in

Pedestrians also have difficulty seeing vehicles approaching the crosswalk when blind spots exist due to obstacles such as illegally parked vehicles.

Accordingly, pedestrians can recognize the approach of a vehicle, check whether the approaching vehicle can be stopped, and drivers can recognize the presence of pedestrians if a device is installed at the crosswalk, traffic accidents at the crosswalk can occur. It is expected that the occurrence can be reduced.

Publication of Patent No. 10-2006-0116759

The object of the present invention is to provide a safe crossing signal that notifies pedestrians of whether a vehicle is approaching and whether the vehicle can be stopped, notifies drivers of the presence of pedestrians, and transmits data to a server when a collision risk or collision situation occurs.

Another object of the present invention is to provide a method of operating a safety crossing signal that notifies pedestrians of the approach of a vehicle, notifies drivers of the presence of pedestrians, and transmits data to a server when a collision risk or collision situation occurs.

The objects of the present invention are not limited to the objects mentioned above, and other objects and advantages of the present invention that are not mentioned can be understood by the following description and will be more clearly understood by the examples of the present invention. Additionally, it will be readily apparent that the objects and advantages of the present invention can be realized by the means and combinations thereof indicated in the patent claims.

A safety crossing signal according to some embodiments of the present invention to solve the above problems includes a pedestrian detection sensor that detects pedestrians near the crosswalk and generates first pedestrian detection data, and the location and speed of the vehicle approaching the crosswalk. A sensor unit including a vehicle detection sensor that detects and generates first vehicle detection data, determines a first crosswalk state for the crosswalk based on the first pedestrian detection data and the first vehicle detection data, Generating a pedestrian output signal output to the pedestrian and a vehicle output signal output to the vehicle based on the first crosswalk state, and generating an event occurrence signal by determining whether an event occurs between the vehicle and the pedestrian. A determination unit, an output unit including a first display that visualizes and outputs the pedestrian output signal as icons and text, and a second display that visualizes and outputs the vehicle output signal as icons and text, when the event occurrence signal is generated. , a communication unit that receives pedestrian event data according to the time of occurrence of the event among the first pedestrian detection data and vehicle event data according to the time of occurrence of the event among the first vehicle detection data from the sensor unit and transmits them to the server; A video unit for taking pictures near a crosswalk, wherein the event includes at least one of a collision risk situation and a collision situation between the pedestrian and the vehicle, and the video unit transmits video event data according to the time of occurrence of the event to the communication unit. do.

Additionally, the video event data may include at least one of the crosswalk signal of the crosswalk, the speed of the vehicle, the distance between the vehicle and the crosswalk, the location of the pedestrian, and the state of the pedestrian.

Additionally, the communication unit may transmit the video event data to the server and receive judgment requirements for the event updated from the server using artificial intelligence analysis.

In addition, the determination unit includes a pedestrian detection data processing unit that derives the presence or absence of the pedestrian from the first pedestrian detection data, and vehicle detection data that derives the presence or absence of the vehicle and whether the vehicle can be stopped from the first vehicle detection data. A processing unit, a crosswalk state determination unit that determines the first crosswalk state based on the presence or absence of the pedestrian, the presence or absence of the vehicle, and whether the vehicle can be stopped, and the pedestrian output based on the first crosswalk state An output signal determination unit that determines a signal and the vehicle output signal, and an event occurrence determination unit that determines whether the event has occurred based on whether the vehicle can be stopped or whether the vehicle has stopped and generates the event occurrence signal. It can be included.

In addition, the communication unit receives the second crosswalk state from another safety crossing signal located on the opposite side of the crosswalk, and the determination unit further uses the second crosswalk state to output the pedestrian output signal and the vehicle output signal. A signal can be generated.

In addition, the pedestrian detection sensor includes a first pedestrian detection sensor that detects a pedestrian in a first area including the crosswalk, and a second area that includes a portion of a sidewalk located on one side of the crosswalk. It includes a second pedestrian detection sensor and a third pedestrian detection sensor that detects a pedestrian in a third area including a portion of the sidewalk located on one side of the crosswalk, and the second area and the third area are the same as each other. You may not.

A method of operating a safety crossing signal according to some embodiments of the present invention to solve the above problem includes detecting a crosswalk signal of a crosswalk, detecting a pedestrian near the crosswalk, and generating first pedestrian detection data; , Generate first vehicle detection data by detecting a vehicle approaching the crosswalk, and determine a crosswalk status for the crosswalk based on the first pedestrian detection data, the first vehicle detection data, and the crosswalk signal. Determine, wherein the crosswalk state includes a first crosswalk state, output a pedestrian output signal and a vehicle output signal based on the crosswalk state, and output a pedestrian output signal and a vehicle output signal based on the first pedestrian detection data and the first vehicle detection data. This includes determining whether a collision risk situation and an event including a collision situation have occurred.

In addition, determining the crosswalk state includes determining whether the crosswalk signal is green, determining the presence or absence of the pedestrian from the first pedestrian detection data, and determining the presence or absence of the pedestrian from the first vehicle detection data. Determine presence or absence, and if the approaching vehicle exists, determine whether the vehicle can be stopped, based on at least one of the crosswalk signal, the presence or absence of the pedestrian, the presence or absence of the vehicle, and whether the vehicle can be stopped. It may include determining the first crosswalk state for the crosswalk.

In addition, it further includes receiving a second crosswalk state from another safety crossing signal located on the opposite side of the crosswalk, and determining the crosswalk state includes the first crosswalk state and the second crosswalk state. It may further include determining the final crosswalk status based on .

In addition, determining whether the event occurs includes determining whether the crosswalk signal is green, if the crosswalk signal is green, determining the presence or absence of the pedestrian, and if the pedestrian exists, the vehicle Determine whether the vehicle can stop at the stop line, and if the vehicle can stop at the stop line, determine whether the vehicle has stopped at the stop line. If the vehicle cannot stop at the stop line or the vehicle does not stop at the stop line, determine whether the vehicle has stopped at the stop line. It is determined that an event has occurred and an event occurrence signal is generated, pedestrian event data according to the occurrence time of the event among the first pedestrian detection data, vehicle event data according to the occurrence time of the event among the first vehicle detection data, and This may include transmitting at least one of video event data according to the time of occurrence of the event to the server.

The safety crossing signal and its operating method of the present invention can inform drivers of the presence of pedestrians through a display. Through this, in cases where the driver cannot directly see the crosswalk signal or pedestrians due to blind spots, the driver is encouraged to drive while taking into account the presence of pedestrians remaining inside the crosswalk or waiting near the crosswalk. Traffic accidents can be prevented.

Additionally, the present invention can notify pedestrians of the approach of a vehicle through a display and speaker. Through this, in cases where pedestrians cannot directly see an approaching vehicle due to a blind spot, traffic accidents at a crosswalk can be prevented by encouraging pedestrians to recognize vehicles before crossing the crosswalk.

Furthermore, the present invention can transmit at least one of the vehicle's location, vehicle's speed, pedestrian's location, pedestrian's speed, and image data to the server when a collision risk or collision situation occurs between a pedestrian and a vehicle. Through this, the server can collect data on collision risk situations or collision situations and use it for learning of self-driving cars, further improving the safety of self-driving cars.

In addition to the above-described content, specific effects of the present invention are described below while explaining specific details for carrying out the invention.

1 is a conceptual diagram illustrating a safety crossing signal according to some embodiments of the present invention.
FIG. 2 is a block diagram for explaining the determination unit of FIG. 1 in detail.
Figure 3 is an example diagram for explaining the safe crossing signal of Figure 1.
Figure 4 is an example diagram for explaining the safe crossing signal of Figure 1.
Figure 5 is an exemplary diagram for explaining a safety crossing signal according to some embodiments of the present invention.
FIGS. 6 and 7 are exemplary diagrams for explaining the sensor unit of FIG. 1 in detail.
FIGS. 8A to 8D are exemplary diagrams for explaining the output unit of FIG. 1 in detail.
Figure 9 is a flowchart for explaining a method of operating a safety crossing signal according to some embodiments of the present invention.
FIG. 10 is a flowchart illustrating in detail the first crosswalk status determination step of FIG. 9.
FIG. 11 is a flowchart for explaining in detail the determination of whether the event of FIG. 9 has occurred.

Terms or words used in this specification and patent claims should not be construed as limited to their general or dictionary meaning. According to the principle that the inventor can define terms or word concepts in order to explain his or her invention in the best way, it should be interpreted with a meaning and concept consistent with the technical idea of the present invention. In addition, the embodiments described in this specification and the configurations shown in the drawings are only one embodiment of the present invention and do not completely represent the technical idea of the present invention, so they cannot be replaced at the time of filing the present application. It should be understood that there may be various equivalents, variations, and applicable examples.

Terms such as first, second, A, and B used in the present specification and claims may be used to describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, a first component may be named a second component, and similarly, the second component may also be named a first component without departing from the scope of the present invention. The term 'and/or' includes any of a plurality of related stated items or a combination of a plurality of related stated items.

The terms used in the specification and claims are merely used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as "include" or "have" should be understood as not precluding the existence or addition possibility of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification. .

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains.

Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless clearly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

Additionally, each configuration, process, process, or method included in each embodiment of the present invention may be shared within the scope of not being technically contradictory to each other.

Hereinafter, with reference to FIGS. 1 to 8A to 8D, a safety crossing signal according to some embodiments of the present invention will be described.

1 is a conceptual diagram illustrating a safety crossing signal according to some embodiments of the present invention.

Referring to Figure 1, the first safety crossing signal 100 according to some embodiments of the present invention includes a sensor unit 110, an imaging unit 130, a determination unit 150, an output unit 170, and a communication unit ( 190).

The sensor unit 110 may detect pedestrians near the crosswalk and generate first pedestrian detection data PD1. The first pedestrian detection data (PD1) may include data related to pedestrians near the crosswalk, such as the presence or absence of pedestrians near the crosswalk, the location of the pedestrian, and the speed of the pedestrian. Additionally, the sensor unit 110 may generate first vehicle detection data VD1 by detecting the location and speed of a vehicle approaching the crosswalk. The first vehicle detection data VD1 may include data related to a vehicle approaching the crosswalk, such as the presence or absence of the vehicle, the location of the vehicle, and the speed of the vehicle. The sensor unit 110 may transmit first pedestrian detection data PD1 and first vehicle detection data VD1 to the determination unit 150.

Specifically, the sensor unit 110 may include a pedestrian detection sensor and a vehicle detection sensor. The pedestrian detection sensor may generate first pedestrian detection data (PD1), and the vehicle detection sensor may generate first vehicle detection data (VD1).

When receiving the event occurrence signal (Evn) from the determination unit 150, the sensor unit 110 transmits pedestrian event data (PED) according to the event occurrence time among the first pedestrian detection data (PD1) to the communication unit 190. You can. At this time, the pedestrian event data (PED) may include the first pedestrian detection data (PD1) for a certain period of time before and after the event occurs. That is, pedestrian event data (PED) may include at least one data of the presence or absence of a pedestrian near a crosswalk, the location of the pedestrian, and the speed of the pedestrian during a certain period before and after the event occurs. Additionally, when receiving the event occurrence signal Evn, the sensor unit 110 may transmit vehicle event data (VED) according to the event occurrence time among the first vehicle detection data VD1 to the communication unit 190. Vehicle event data (VED) may include first vehicle detection data (VD1) for a certain period of time before and after the event occurs. That is, vehicle event data (VED) may include at least one of the following: the presence or absence of a vehicle approaching the crosswalk, the location of the vehicle, and the speed of the vehicle for a certain period of time before and after the event occurs.

The sensor unit 110 may be implemented separately as needed. Through this, the accuracy of pedestrian detection or vehicle detection can be further improved by avoiding obstacles such as street trees near crosswalks.

The imaging unit 130 may generate image data by photographing the area near the crosswalk. When the video unit 130 receives the event occurrence signal (Evn) from the determination unit 150, the video event data (Vd) according to the time of event occurrence can be transmitted to the communication unit 190. Video event data (Vd) may include video data for a certain period of time before and after the event occurs. Specifically, the video event data (Vd) may include video data including at least one of a crosswalk signal at the time of event occurrence, the speed of the vehicle, the distance between the vehicle and the crosswalk, the location of the pedestrian, and the status of the pedestrian. . That is, the video event data (Vd) may be data that captures situations inside and outside the crosswalk for a certain period of time before and after the event occurs. At this time, the pedestrian's condition can be confirmed or estimated through the image, and may include whether the pedestrian is intoxicated, whether a walking aid is used, and the direction of movement of the pedestrian.

The determination unit 150 may determine the first crosswalk status (Stat1) for the crosswalk based on the first pedestrian detection data (PD1) and the first vehicle detection data (VD1). The first crosswalk status (Stat1) may be information about whether the state of the crosswalk is safe for pedestrians to cross, based on the presence or absence of pedestrians, the presence or absence of vehicles, and whether or not vehicles can be stopped. The determination unit 150 may generate a pedestrian output signal (Out1) and a vehicle output signal (Out2) based on the first crosswalk state (Stat1).

Additionally, the determination unit 150 may receive the second crosswalk status (Stat2) from the communication unit 190. The second crosswalk status (Stat2) may also be information about whether the state of the crosswalk is safe for pedestrians to cross. The determination unit 150 may generate a pedestrian output signal (Out1) and a vehicle output signal (Out2) based on the first crosswalk state (Stat1) and the second crosswalk state (Stat2).

The determination unit 150 may determine whether an event occurs between a vehicle and a pedestrian approaching the crosswalk and generate an event occurrence signal (Evn). At this time, the event may include at least one of a collision risk situation and a collision situation between a pedestrian and a vehicle. That is, the determination unit 150 may monitor situations in which an accident occurs or an accident may occur at a crosswalk and classify it as an event.

The output unit 170 may include a display that visualizes and outputs the pedestrian output signal (Out1) and the vehicle output signal (Out2). Additionally, the output unit 170 may further include a speaker that outputs voice guidance based on the pedestrian output signal (Out1) or the vehicle output signal (Out2). The output unit 170 can output a pedestrian output signal (Out1) and a vehicle output signal (Out2) through the display and the speaker to provide information to pedestrians and drivers.

The communication unit 190 may communicate with the second safety crossing signal 200. The second safe crossing signal 200 may be a safe crossing signal located across from the same crosswalk as the first safe crossing signal 100. The communication unit 190 may transmit the first crosswalk status (Stat1) to the second safe crossing signal 200. Additionally, the communication unit 190 may receive the second crosswalk status (Stat2) from the second safety crossing signal 200. At this time, the first crosswalk state (Stat1) is the state of the crosswalk determined by the first safe crossing signal 100, and the second crosswalk state (Stat2) is the state of the crosswalk determined by the second safe crossing signal 200 for the same crosswalk. It may be the condition of the crosswalk that has been determined. The state of the crosswalk will be described in detail in Figure 2.

The communication unit 190 can communicate with the server 300. The server 300 may include a module that learns the autonomous driving of a car. The communication unit 190 may transmit pedestrian event data (PED), vehicle event data (VED), and video event data (Vd) to the server 300. The server 300 can use pedestrian event data (PED), vehicle event data (VED), and video event data (Vd) for autonomous driving learning. The server 300 can improve the driving performance of the self-driving car by transmitting the results of self-driving learning to the self-driving car.

Additionally, the server 300 may include a server that performs artificial intelligence analysis of images or videos. The server 300 can analyze pedestrian event data (PED), vehicle event data (VED), and video event data (Vd) using an artificial intelligence algorithm and update the event judgment requirements (Cndt). That is, the server 300 can modify the collision risk situation or the judgment requirements (Cndt) of the collision situation through artificial intelligence analysis.

Although not shown in the drawing, the first safety crossing signal 100 according to some embodiments of the present invention may further include a database. The database can store all data and signals generated by the first safety crossing signal 100. Alternatively, the server 300 may store all data and signals generated by the first safety crossing signal 100.

In addition, although not shown in the drawing, the first safety crossing signal 100 according to some embodiments of the present invention can detect a crosswalk signal. Specifically, the first safe crossing signal 100 may receive a crosswalk signal from a traffic signal controller. Alternatively, the first safe crossing signal 100 may detect a crosswalk signal by recognizing a crosswalk signal light located opposite the crosswalk as an image or video.

Although the determination unit 150 is shown in the drawing as being included in the first safe crossing signal 100, the determination unit 150 may be configured separately from the first safe crossing signal 100 or may be included in the server 300. In addition, the drawing shows that the determination unit 150 generates a pedestrian output signal (Out1) and a vehicle output signal (Out2), but the present embodiment is not limited thereto. As another example, the output unit 170 may receive the first crosswalk status (Stat1) and generate a pedestrian output signal (Out1) and a vehicle output signal (Out2).

Additionally, although only one server 300 is shown in the drawing, the present embodiment is not limited thereto. The first safety crossing signal 100 of the present invention may be connected to a communication network and communicate with a plurality of servers 300. As another example, when pedestrian event data (PED), vehicle event data (VED), and video event data (Vd) are received, the server 300 takes follow-up actions such as sending a notification about the occurrence of the event to the police station or fire department. You can also run it.

The first safe crossing signal 100, the second safe crossing signal 200, and the server 300 can transmit and receive data with each other through a communication network. Communication networks may include networks based on wired Internet technology, wireless Internet technology, and short-distance communication technology. Wired Internet technology may include, for example, at least one of a local area network (LAN) and a wide area network (WAN).

Wireless Internet technologies include, for example, Wireless LAN (WLAN), DLNA (Digital Living Network Alliance), Wibro (Wireless Broadband), Wimax (World Interoperability for Microwave Access: Wimax), and HSDPA (High Speed Downlink Packet). Access), HSUPA (High Speed Uplink Packet Access), IEEE 802.16, Long Term Evolution (LTE), LTE-A (Long Term Evolution-Advanced), Wireless Mobile Broadband Service (WMBS) , may include at least one of 5G NR (New Radio) technology and narrowband Internet of Things (NB-IoT). However, this embodiment is not limited to this.

Short-range communication technologies include, for example, Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra-Wideband (UWB), ZigBee, and Near Field Communication. At least one of NFC), Ultrasound Communication (USC), Visible Light Communication (VLC), Wi-Fi, Wi-Fi Direct, and 5G NR (New Radio) may include. However, this embodiment is not limited to this.

The first safety crossing signal 100, the second safety crossing signal 200, and the server 300 that communicate through a communication network can comply with technical standards and standard communication methods for mobile communication. For example, standard communication methods include GSM (Global System for Mobile communication), CDMA (Code Division Multi Access), CDMA2000 (Code Division Multi Access 2000), and EV-DO (Enhanced Voice-Data Optimized or Enhanced Voice-Data Only). , at least one of Wideband CDMA (WCDMA), High Speed Downlink Packet Access (HSDPA), High Speed Uplink Packet Access (HSUPA), Long Term Evolution (LTE), Long Term Evolution-Advanced (LTEA), and 5G New Radio (NR) may include. However, this embodiment is not limited to this.

FIG. 2 is a block diagram for explaining the determination unit of FIG. 1 in detail.

Referring to Figure 2, the determination unit 150 includes a pedestrian detection data processing unit 151, a vehicle detection data processing unit 153, a crosswalk state determination unit 155, an output signal determination unit 157, and an event occurrence determination unit. It may include (159).

The pedestrian detection data processing unit 151 may derive the presence or absence of a pedestrian (PP) from the first pedestrian detection data (PD1). The first pedestrian detection data PD1 may include data detecting a pedestrian. Specifically, the first pedestrian detection data PD1 may include at least one of pedestrian presence (PP), the pedestrian's location, and speed. Pedestrian presence (PP) may indicate whether there are pedestrians on the sidewalk near the crosswalk where the first safe crossing signal 100 is located.

The vehicle detection data processing unit 153 may derive vehicle presence (VP) and whether the vehicle can be stopped (VS) from the first vehicle detection data (VD1). Vehicle presence (VP) may include whether there is a vehicle approaching the crosswalk. Whether it is possible to stop (VS) may include whether the vehicle can stop at the stop line. Specifically, the vehicle detection data processing unit 153 may calculate the braking distance based on the position and speed of the vehicle included in the first vehicle detection data VD1. The vehicle detection data processing unit 153 may determine whether the vehicle has progressed by the braking distance calculated from the vehicle's location to exceed the stop line and derive whether stopping is possible (VS).

The crosswalk status determination unit 155 may determine the first crosswalk status (Stat1) based on the presence or absence of pedestrians (PP), presence or absence of vehicles (VP), and whether or not stopping is possible (VS). Although not shown in the drawing, the crosswalk status determination unit 155 may determine the first crosswalk status (Stat1) by further using the crosswalk signal. The first crosswalk status (Stat1) may indicate the status of pedestrians and vehicles near the crosswalk.

For example, the first crosswalk state (Stat1) may be determined as one of the first to twelfth cases depending on the crosswalk signal, presence of pedestrians (PP), presence of vehicles (VP), and whether or not stopping is possible (VS). The first crosswalk state (Stat1) is the first case of 'green crosswalk signal, vehicles present, vehicles available to stop, pedestrians present', and the second case of 'red crosswalk signal, vehicles present, vehicles available to stop, pedestrians present'. , 3rd case with 'green crosswalk signal, vehicle present, vehicle capable of stopping, no pedestrians', 4th case with 'red crosswalk signal, vehicle present, vehicle capable of stopping, no pedestrians', 'green crosswalk signal, vehicle' Yes, vehicle cannot stop, pedestrians present. Case 5, 'Red crosswalk signal, vehicle present, vehicle cannot stop, pedestrians present' Case 6, 'Green crosswalk signal, vehicle present, vehicle cannot stop, pedestrians prohibited' 7th case with 'red crosswalk signal, vehicles present, vehicles cannot stop, no pedestrians', 8th case with 'green crosswalk signal, no vehicles, pedestrians present', 9th case with 'red crosswalk signal, It may include the 10th case with 'no vehicles, no pedestrians', the 11th case with 'green crosswalk signal, no vehicles, no pedestrians', and the 12th case with 'red crosswalk signal, no vehicles, no pedestrians'. However, this embodiment is not limited to this, and the crosswalk state determination unit 155 may determine the first crosswalk state (Stat1) by further using other factors.

The crosswalk status determination unit 155 may receive the second crosswalk status (Stat2). The second crosswalk state (Stat2) may be a crosswalk state generated by the second safety crossing signal 200 located across from the crosswalk. That is, for the same crosswalk, the crosswalk state generated by the first safe crossing signal 100 is the first crosswalk state (Stat1), and the crosswalk state generated by the second safe crossing signal 200 is the second crosswalk state. It may be status (Stat2). The crosswalk state determination unit 155 may determine which one of the first crosswalk state (Stat1) and the second crosswalk state (Stat2) has a higher risk as the final crosswalk state (Stat).

For example, the first crosswalk state (Stat1) is the first case of 'green crosswalk signal, vehicle present, vehicle can stop, pedestrian present', and the second crosswalk state (Stat2) is 'green crosswalk signal,' In case 9 where there are no vehicles and pedestrians present, the crosswalk state determination unit 155 determines that the risk of the first crosswalk state (Stat1) is higher and sets the first crosswalk state (Stat1) to the final crosswalk. It can be decided by status (Stat).

The output signal determination unit 157 may receive the final crosswalk status (Stat). The output signal determination unit 157 may determine the pedestrian output signal (Out1) and the vehicle output signal (Out2) based on the final crosswalk status (Stat).

The event occurrence determination unit 159 may receive first pedestrian detection data PD1 and first vehicle detection data VD1. The event occurrence determination unit 159 may determine whether an event has occurred based on the first pedestrian detection data PD1 and the first vehicle detection data VD1. In other words, the event occurrence determination unit 159 may determine whether a collision risk situation or a collision situation has occurred using the first pedestrian detection data PD1 and the first vehicle detection data VD1. If it is determined that an event has occurred, the event occurrence determination unit 159 may generate an event occurrence signal (Evn).

The event occurrence determination unit 159 may receive and update the judgment requirements (Cndt) of the event. The event occurrence determination unit 159 may determine whether an event has occurred based on the judgment requirement (Cndt). The event occurrence determination unit 159 may determine whether an event has occurred in real time or non-real time.

FIG. 3 is an exemplary diagram for explaining the safe crossing signal of FIG. 1 , and FIG. 4 is an exemplary diagram for explaining the safe crossing signal of FIG. 1 .

Referring to <A1> in FIG. 3, the first safe crossing signal 100 may include first displays 171 and 173 that visualize and output the pedestrian output signal Out1 on one side. The first displays 171 and 173 may include a first part 171 that outputs an icon according to the pedestrian output signal Out1 and a second part 173 that outputs text. Additionally, the first safety crossing signal 100 may include a sensor unit 110 on the top and a communication unit 190 on the side. The sensor unit 110 may include a pedestrian detection sensor and a vehicle detection sensor therein.

Referring to <A2> in FIG. 3, the first safety crossing signal 100 may include second displays 175 and 177 that output a vehicle output signal Out2 on the other side. Like the first display, the second displays 175 and 177 may include a third part 175 that outputs an icon according to the vehicle output signal Out2 and a fourth part 177 that outputs text. . However, this embodiment is not limited to this, and the second part 173 and the fourth part 177 that output characters may be omitted.

Referring to <B1> and <B2> of FIG. 4, the first safety crossing signal 100 may include speakers 179 on both sides. The speaker 179 can output voice guidance according to the pedestrian output signal (Out1) or the vehicle output signal (Out2).

Figure 5 is an exemplary diagram for explaining a safety crossing signal according to some embodiments of the present invention.

<C1> in Figure 5 is a diagram showing the crosswalk signal is green and a pedestrian is about to enter the crosswalk from the direction of vehicle travel, and <C2> in Figure 5 is a diagram showing the same scene as <C1> from the opposite direction. It is a drawing. Referring to <C1> in FIG. 5, the second displays 175 and 177 can visualize and output pedestrian crossing with a green icon crossing the street and the phrase “crossing.” Through this, the driver of a vehicle approaching the crosswalk can confirm the presence of the pedestrian through the second displays 175 and 177 even if the pedestrian is obscured by an obstacle and cannot be directly seen.

Referring to <C2> in FIG. 5, the first displays 171 and 173 can visualize and output the approach of a vehicle using a yellow vehicle icon and the phrase “vehicle approach.” Additionally, the speaker 179 can output voice guidance such as “Cross while paying attention to vehicles.” Through this, a pedestrian trying to enter the crosswalk can check the approach of the vehicle through the first displays 171 and 173 even if the vehicle is blocked by an obstacle and is not directly visible.

FIGS. 6 and 7 are exemplary diagrams for explaining the sensor unit of FIG. 1 in detail.

Referring to <D1> in FIG. 6, the first safety crossing signal 100 includes a first pedestrian detection sensor that detects pedestrians in the first area (S1) and a second pedestrian detection sensor that detects pedestrians in the second area (S2). It may include a detection sensor and a third pedestrian detection sensor that detects pedestrians in the third area (S3). Specifically, the first area S1 may be an area that includes a crosswalk and does not include a stop line. The second area S2 and the third area S3 may include a portion of the sidewalk where the first safety crossing signal 100 is located. The second area S2 and the third area S3 may further include a portion of the shoulder. At this time, the second area S2 and the third area S3 are not identical to each other and may partially overlap. That is, the first safe crossing signal 100 can detect pedestrians on the sidewalk and crosswalk located on one side of the crosswalk.

Referring to <D2> in FIG. 6, the second safety crossing signal 100 detects pedestrians in the fourth area (S1'), the fifth area (S2'), and the sixth area (S3') and detects the second pedestrian. Sensing data can be generated. At this time, the fourth area S1' may overlap with the first area S1. The fifth area S2' and the sixth area S3' may be opposite to the second area S2 and the third area S3 based on the crosswalk. By communicating with the second safe crossing signal 100, the first safe crossing signal 100 can have the effect of also utilizing the second pedestrian detection data in the fourth to sixth areas S1' to S3'.

Although the second area S2 and the third area S3 are shown asymmetrically in the drawing, the present embodiment is not limited thereto. The specific shape of the second area S2 and the third area S3 may vary depending on the shape of the road, and may be set not to include a roadway except the shoulder. The specific shapes of the fifth area S2' and sixth area S3' may also vary depending on the shape of the road.

Referring to <E1> in FIG. 7, the first safety crossing signal 100 may include a vehicle detection sensor that detects a vehicle in the first vehicle zone (P1). The first vehicle area P1 may include a portion of the roadway located near the first safe crossing signal 100. The roadway may include a first traffic roadway traveling in a first direction with respect to the center line, and a second traffic roadway running in a second direction opposite to the first direction. At this time, the first and second traffic roads may be adjacent to the first safe crossing signal 100 and the second safe crossing signal 200, respectively. The first vehicle zone P1 may include an area of the first traffic roadway. Additionally, the first vehicle area P1 may include an area from a specific point before passing the crosswalk on the first traffic road to the stop line. In the drawing, the first vehicle area P1 is shown not including the area of the first traffic road after passing the crosswalk, but the present embodiment is not limited thereto.

Referring to <E2> in FIG. 7, the second safety crossing signal 200 may include a vehicle detection sensor that detects a vehicle in the second vehicle zone (P2). Likewise, the second vehicle area P2 may include a portion of the roadway located near the second safe crossing signal 200. That is, the second vehicle area P2 may include an area of the second traffic roadway. Additionally, the second vehicle area P2 may include an area from a specific point before passing the crosswalk on the second traffic road to the stop line. In the drawing, the second vehicle area P2 is shown not including the area of the second traffic road after passing the crosswalk, but this embodiment is not limited thereto.

FIGS. 8A to 8D are exemplary diagrams for explaining the output unit of FIG. 1 in detail.

8A to 8D, the output unit 170 displays pedestrian information through the first displays 171 and 173, the second displays 175 and 177, and the speaker 179 based on the final crosswalk status (Stat). An output signal (Out1) and a vehicle output signal (Out2) can be output.

For example, referring to Figure 8a, the first case where the final crosswalk status (Stat) is 'green crosswalk signal, vehicle present, vehicle stop possible, pedestrian present' or 'green crosswalk signal, vehicle present, vehicle stopped' In the third case where there are no pedestrians, the first displays 171 and 173 may output a yellow icon and text in the shape of a vehicle notifying the approach of a vehicle. In this case, since the vehicle can stop, pedestrians can be encouraged to cross the crosswalk while paying attention to the approach of the vehicle.

The second case where the final crosswalk status (Stat) is ‘red crosswalk signal, vehicle present, vehicle capable of stopping, pedestrian present’, the fourth case where the final crosswalk signal is ‘red crosswalk signal, vehicle present, vehicle capable of stopping, no pedestrian present’, The 5th case with 'green crosswalk signal, no vehicle present, vehicle unable to stop, pedestrians present', the 6th case with 'red crosswalk signal, vehicle present, vehicle unable to stop, pedestrians present', 'green crosswalk signal, vehicle present' , In the case of the 7th case where 'vehicle cannot stop, no pedestrians' or the 8th case where 'red crosswalk signal, vehicle present, vehicle cannot be stopped, no pedestrians', the first displays (171, 173) notify of the approach of the vehicle. A red icon and text of the vehicle shape can be printed. In this case, since the vehicle does not stop at the stop line due to a red crosswalk signal or the vehicle cannot stop at the stop line despite a green crosswalk signal, pedestrians can be encouraged to cross the crosswalk after checking the vehicle's progress and the crosswalk signal. there is.

If the final crosswalk status (Stat) is the 9th case of 'green crosswalk signal, no vehicles, no pedestrians' or the 11th case of 'green crosswalk signal, no vehicles, no pedestrians', the first display (171, 173) can output a green icon in the shape of a pedestrian and text notifying pedestrian crossing. In this case, since there are no vehicles approaching the crosswalk, pedestrians can be encouraged to cross the crosswalk with confidence.

If the final crosswalk status (Stat) is the 10th case of 'red crosswalk signal, no vehicles, no pedestrians' or the 12th case of 'red crosswalk signal, no vehicles, no pedestrians', the first display (171, 173) can output a red icon in the shape of a vehicle and a phrase requesting to wait. In this case, there are no vehicles detected by the first safe crossing signal 100, but since it is a red crosswalk signal, pedestrians can be induced to wait for the green crosswalk signal.

On the other hand, in the same final crosswalk state (Stat), the second displays 175 and 177 may output different icons and text from the first displays 171 and 173. The first case where the final crosswalk status (Stat) is ‘green crosswalk signal, vehicles present, vehicles can stop, pedestrians present’, the third case where the final crosswalk signal is ‘green crosswalk signal, vehicles present, vehicles can stop, pedestrians are not present’, The 5th case with 'green crosswalk signal, vehicle present, vehicle unable to stop, pedestrians present', the 7th case with 'green crosswalk signal, vehicle present, vehicle unable to stop, no pedestrians', 'green crosswalk signal, no vehicle allowed' , In the case of the 9th case with 'pedestrians present' or the 11th case with 'green crosswalk signal, no vehicles, no pedestrians', the second displays (175, 177) output a green icon and text in the shape of a pedestrian notifying pedestrian crossing. can do. In this case, the driver can recognize pedestrian crossing and encourage safer driving on the crosswalk.

The second case where the final crosswalk status (Stat) is ‘red crosswalk signal, vehicle present, vehicle can stop, pedestrian present’, the sixth case where the final crosswalk signal is ‘red crosswalk signal, vehicle present, vehicle cannot stop, pedestrian present’, or In the tenth case of 'red crosswalk signal, no vehicles, no pedestrians present', the second displays 175 and 177 may output a red icon and text in the shape of a pedestrian notifying that pedestrians are waiting. In this case, the driver can recognize the presence of pedestrians and be encouraged to drive more safely.

The 4th case where the final crosswalk status (Stat) is ‘red crosswalk signal, vehicle present, vehicle can stop, no pedestrians’, the 8th case where the final crosswalk signal is ‘red crosswalk signal, vehicle present, vehicle cannot stop, no pedestrians’, or In the twelfth case of 'red crosswalk signal, no vehicles, no pedestrians', the second displays 175 and 177 may output a yellow circular icon and text telling you to be careful at the crosswalk. In this case, drivers can be encouraged to drive while paying attention to the crosswalk even though there are no pedestrians near the crosswalk.

As another example, referring to FIG. 8B, the second displays 175 and 177 may output a green arrow icon instead of a yellow circular icon. When the second displays 175 and 177 output arrow icons, the second displays 175 and 177 may not output text but only the icon.

As another example, referring to FIG. 8C, the first displays 171 and 173 may output a pedestrian-shaped icon instead of a vehicle-shaped icon. Additionally, the second displays 175 and 177 may output a circular icon instead of a pedestrian-shaped icon. At this time, the shape, color of the icon, and color of the text displayed on the first displays 171 and 173 and the second displays 175 and 177 may vary depending on the final crosswalk status (Stat). Through this, drivers and pedestrians who are familiar with the existing signal system can more intuitively recognize the signal of the safe crossing signal of the present invention.

As another example, referring to FIG. 8D, the second displays 175 and 177 may output a red or yellow circular icon, or a yellow or green arrow icon.

However, the present invention is not limited to the above-described embodiment, and the shape of the icon output from the first displays 171 and 173 and the second displays 175 and 177, the color of the icon, the presence or absence of text, and the color of the text The specific contents of the and phrases may be modified and implemented as many times as desired.

Hereinafter, with further reference to FIGS. 9 to 11, a method of operating a safety crossing signal according to some embodiments of the present invention will be described. Parts that overlap with the foregoing content are omitted or simplified.

FIG. 9 is a flowchart illustrating a method of operating a safety crossing signal according to some embodiments of the present invention, and FIG. 10 is a flowchart illustrating in detail the first crosswalk state determination step of FIG. 9. FIG. 11 is a flowchart for explaining in detail the determination of whether the event of FIG. 9 has occurred.

Referring to FIG. 9, the first safe crossing signal 100 detects a crosswalk signal (S100).

The first safe crossing signal 100 can detect a crosswalk signal. Specifically, the first safe crossing signal 100 may receive a crosswalk signal from a traffic signal controller or detect a crosswalk signal by recognizing a crosswalk signal light.

Next, the first safety crossing signal 100 generates first pedestrian detection data (S200).

Specifically, referring to FIG. 6 , the first safety crossing signal 100 may detect pedestrians in the first to third areas (S1 to S3) and generate first pedestrian detection data. The first pedestrian detection data may include at least one of the presence or absence of a pedestrian, the location and speed of the pedestrian.

Next, the first safety crossing signal 100 generates first vehicle detection data (S300).

Specifically, referring to FIG. 7 , the first safety crossing signal 100 may detect a vehicle in the first vehicle zone P1 and generate first vehicle detection data. The first vehicle detection data may include the location and speed of the vehicle.

Next, the first safe crossing signal 100 determines the first crosswalk state (S400).

In detail, referring to FIG. 10, the first safe crossing signal 100 determines whether the crosswalk signal is green (S410). Additionally, the first safe crossing signal 100 determines the presence or absence of a pedestrian using the first pedestrian detection data (S430). The first safe crossing signal 100 uses the first vehicle detection data to determine whether there is an approaching vehicle and whether it can stop at the stop line (S450).

The first safe crossing signal 100 can determine whether the crosswalk signal is green. At this time, for convenience, the first safe crossing signal 100 may determine that the green flashing light is also a green crosswalk signal. Alternatively, the first safety crossing signal 100 may determine that a green flashing light is a red crosswalk signal. The first safe crossing signal 100 can determine the presence or absence of a pedestrian using the first pedestrian detection data. Additionally, the first safe crossing signal 100 may determine the presence or absence of an approaching vehicle using the first vehicle detection data. When an approaching vehicle exists, the first safe crossing signal 100 can determine whether the vehicle can stop at the stop line. Specifically, the first safe crossing signal 100 derives the braking distance from the speed of the vehicle included in the first vehicle detection data, and determines whether the vehicle can stop at the stop line when it moves from the vehicle's position by the braking distance. You can.

next. The first safe crossing signal 100 determines the first crosswalk status (S470).

The first safe crossing signal 100 may determine the first crosswalk status for the crosswalk based on at least one of the crosswalk signal, the presence or absence of a pedestrian, the presence or absence of a vehicle, and whether the vehicle can stop at the stop line. The first crosswalk status may include information about whether it is safe for pedestrians to enter the crosswalk and whether it is safe for vehicles to enter the crosswalk. Exemplarily, the first crosswalk state may be determined as one of the first to twelfth cases based on the crosswalk signal, presence or absence of pedestrians, presence or absence of vehicles, and whether or not stopping is possible.

Referring again to FIG. 9, the first safe crossing signal 100 receives the second crosswalk status from the second safe crossing signal 200 (S500).

The second crosswalk state may be a crosswalk state determined by the second safe crossing signal 200 for the same crosswalk. The second safe crossing signal 200 may be located across from the same crosswalk as the first safe crossing signal 100.

Specifically, referring to FIG. 6 , the second safety crossing signal 200 may detect pedestrians in the fourth to sixth areas S1' to S3' and generate second pedestrian detection data. Additionally, referring to FIG. 7 , the second safety crossing signal 200 may detect a vehicle in the second vehicle zone P2 and generate second vehicle detection data. Like the first safe crossing signal 100, the second safe crossing signal 200 can derive the presence or absence of a pedestrian from the second pedestrian detection data, and the presence or absence of a vehicle and whether the vehicle can be stopped from the second vehicle detection data. there is. Subsequently, the second safe crossing signal 200 may determine the second crosswalk status for the crosswalk based on at least one of the crosswalk signal, the presence or absence of a pedestrian, the presence or absence of a vehicle, and whether the vehicle can be stopped. The second safe crossing signal 200 may transmit the second crosswalk status to the first safe crossing signal 100.

Next, the first safe crossing signal 100 determines the final crosswalk state (S600).

The first safe crossing signal 100 may determine the final crosswalk state based on the first crosswalk state and the second crosswalk state. At this time, the first safe crossing signal 100 may determine which one of the first crosswalk state and the second crosswalk state has a high risk as the final crosswalk state.

For example, the first crosswalk state is case 9, which is ‘green crosswalk signal, no vehicles, pedestrians present’, and the second crosswalk state is ‘green crosswalk signal, vehicles present, vehicles cannot stop, pedestrians present’. In the case of the fifth case, the first safety crossing signal 100 may determine that the risk of the fifth case is higher than that of the ninth case, and determine the final crosswalk state as the fifth case.

Next, the first safe crossing signal 100 outputs a pedestrian output signal and a vehicle output signal (S700).

The first safe crossing signal 100 may determine a pedestrian output signal and a vehicle output signal based on the final crosswalk state. Subsequently, the first safe crossing signal 100 may output a pedestrian output signal through the first display and speaker, and output a vehicle output signal through the second display.

Next, the first safety crossing signal 100 determines whether an event has occurred (S800).

In detail, referring to FIG. 11, the first safe crossing signal 100 determines whether the crosswalk signal is green (S810). When the crosswalk signal is green, the first safe crossing signal 100 determines whether a pedestrian exists (S820). If the crosswalk signal is red, the first safe crossing signal 100 performs step S810 again.

The first safe crossing signal 100 can determine whether the crosswalk signal is green. At this time, the first safe crossing signal 100 can use the result of determining whether the crosswalk signal is green in step S410. Additionally, the first safe crossing signal 100 can determine the presence or absence of a pedestrian. Likewise, the first safe crossing signal 100 can use the result of determining the presence or absence of a pedestrian in step S430.

When a pedestrian exists, the first safe crossing signal 100 determines whether the vehicle can stop at the stop line (S830). If there are no pedestrians, the first safe crossing signal 100 performs step S810 again.

The first safe crossing signal 100 can determine whether the vehicle can stop at the stop line. Likewise, the first safety crossing signal 100 can use the result of determining whether or not stopping is possible in step S450.

If the vehicle can stop at the stop line, the first safe crossing signal 100 determines whether the vehicle has stopped at the stop line (S840). When the vehicle does not stop at the stop line or when the vehicle cannot stop at the stop line, the first safe crossing signal 100 generates an event generation signal (S850).

If the vehicle can stop at the stop line and the vehicle stops at the stop line, the first safe crossing signal 100 may determine that the risk of collision is low because the vehicle has stopped at the stop line. That is, the first safe crossing signal 100 may determine that an event has not occurred between the pedestrian and the vehicle.

On the other hand, if the vehicle cannot stop at the stop line, the first safe crossing signal 100 may determine that the risk of an accident is high. Additionally, if the vehicle does not stop at the stop line even though it can, the first safe crossing signal 100 may determine that the risk of collision is high. Accordingly, the first safe crossing signal 100 can generate an event generation signal when the vehicle cannot stop at the stop line or does not stop at the stop line.

Alternatively, the first safety crossing signal 100 may determine whether an event has occurred based on the event judgment requirements (Cndt). The event judgment requirements (Cndt) may be updated by artificial intelligence analysis of at least one of pedestrian event data, vehicle event data, and video event data in the server 300.

Next, the first safety crossing signal 100 transmits pedestrian event data, vehicle event data, and video event data to the server (S860).

When an event occurrence signal is generated, the first safety crossing signal 100 may transmit pedestrian event data, vehicle event data, and video event data to the server 300. The server 300 can analyze pedestrian event data, vehicle event data, and video event data using an artificial intelligence algorithm and derive judgment requirements (Cndt) for the event. The first safety crossing signal 100 can receive and update the judgment requirements (Cndt) of the event.

Additionally, the server 300 can use pedestrian event data, vehicle event data, and video event data for autonomous driving learning. Through this, self-driving cars can learn various accident risk situations, further improving the safety of self-driving.

In the drawing, steps S410, S430, and S450 are shown to be performed sequentially, but the present embodiment is not limited thereto. Steps S410, S430, and S450 may be performed in parallel or in a different order.

Likewise, although the drawing shows step S820 being performed after step S810, step S810 may also be performed after step S820.

The safety crossing signal and its operating method according to this embodiment can notify the driver of the presence of pedestrians through a display. Additionally, the present invention can notify pedestrians of the presence of a vehicle through a display and speaker. Through this, even when pedestrians and drivers cannot see each other directly due to obstacles, drivers can recognize pedestrians and pedestrians can recognize vehicles, reducing the risk of traffic accidents occurring at crosswalks.

In addition, the present invention transmits data on a collision risk situation or collision situation to a server, and the server can use it for autonomous driving learning or update the criteria for determining an accident risk situation through artificial intelligence analysis. Through this, the safety of self-driving cars can be improved and accident risk situations can be more accurately determined.

The above description is merely an illustrative explanation of the technical idea of this embodiment, and those skilled in the art will be able to make various modifications and variations without departing from the essential characteristics of this embodiment. Accordingly, the present embodiments are not intended to limit the technical idea of the present embodiment, but rather to explain it, and the scope of the technical idea of the present embodiment is not limited by these examples. The scope of protection of this embodiment should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of rights of this embodiment.

Claims (10)

A sensor unit including a pedestrian detection sensor that detects pedestrians near the crosswalk and generates first pedestrian detection data, and a vehicle detection sensor that detects the location and speed of a vehicle approaching the crosswalk and generates first vehicle detection data. ;
A pedestrian output signal that determines a first crosswalk state for the crosswalk based on the first pedestrian detection data and the first vehicle detection data and outputs to the pedestrian based on the first crosswalk state, the vehicle a determination unit that generates a vehicle output signal to be output to the vehicle and determines whether an event occurs between the vehicle and the pedestrian to generate an event occurrence signal;
An output unit including a first display that visualizes and outputs the pedestrian output signal as icons and characters, and a second display that visualizes and outputs the vehicle output signal as icons and characters;
When the event occurrence signal is generated, pedestrian event data according to the event occurrence time of the event among the first pedestrian detection data and vehicle event data according to the event occurrence time of the event among the first vehicle detection data are received from the sensor unit. a communication unit that transmits the information to the server; and
Including a video unit that takes pictures of the area near the crosswalk,
The event includes at least one of a collision risk situation and a collision situation between the pedestrian and the vehicle,
The video unit transmits video event data according to the time of occurrence of the event to the communication unit,
The Department of Communications,
Transmitting the video event data to the server,
Receiving the judgment requirements of the event updated using artificial intelligence analysis from the server
Safe crossing signal.
According to claim 1,
The video event data includes at least one of the crosswalk signal of the crosswalk, the speed of the vehicle, the distance between the vehicle and the crosswalk, the location of the pedestrian, and the state of the pedestrian.
Safe crossing signal.
delete According to claim 1,
The judgment department,
a pedestrian detection data processing unit that derives the presence or absence of the pedestrian from the first pedestrian detection data;
a vehicle detection data processor that derives the presence or absence of the vehicle and whether the vehicle can be stopped from the first vehicle detection data;
A crosswalk state determination unit that determines the first crosswalk state based on the presence or absence of the pedestrian, the presence or absence of the vehicle, and whether the vehicle can be stopped;
an output signal determination unit that determines the pedestrian output signal and the vehicle output signal based on the first crosswalk state;
Comprising an event occurrence determination unit that determines whether the event occurs based on whether the vehicle can be stopped or whether the vehicle is stopped and generates the event occurrence signal.
Safe crossing signal.
According to claim 1,
The communication unit receives the second crosswalk status from another safety crossing signal located on the opposite side of the crosswalk,
The determination unit further uses the second crosswalk state to generate the pedestrian output signal and the vehicle output signal.
Safe crossing signal.
According to claim 1,
The pedestrian detection sensor is,
A first pedestrian detection sensor that detects a pedestrian in a first area including the crosswalk,
a second pedestrian detection sensor that detects pedestrians in a second area including a portion of the sidewalk located on one side of the crosswalk;
It includes a third pedestrian detection sensor that detects a pedestrian in a third area including a portion of the sidewalk located on one side of the crosswalk,
The second area and the third area are not identical to each other.
Safe crossing signal.
Detect crosswalk signals at crosswalks,
Generate first pedestrian detection data by detecting pedestrians near the crosswalk,
Generate first vehicle detection data by detecting a vehicle approaching the crosswalk,
A crosswalk state for the crosswalk is determined based on the first pedestrian detection data, the first vehicle detection data, and the crosswalk signal, wherein the crosswalk state includes a first crosswalk state,
Outputting a pedestrian output signal and a vehicle output signal based on the crosswalk status,
Based on the first pedestrian detection data and the first vehicle detection data, determining whether an event including a collision risk situation and a collision situation occurs,
To determine whether the above event occurs,
Transmitting video event data according to the time of occurrence of the event to the server,
Including receiving judgment requirements for the event updated using artificial intelligence analysis from the server.
How the safe crossing signal works.
According to clause 7,
Determining the crosswalk status is,
Determine whether the crosswalk signal is green,
Determine the presence or absence of the pedestrian from the first pedestrian detection data,
Determine the presence or absence of the approaching vehicle from the first vehicle detection data,
If the approaching vehicle exists, determine whether the vehicle can be stopped,
Comprising determining the first crosswalk state for the crosswalk based on at least one of the crosswalk signal, the presence or absence of the pedestrian, the presence or absence of the vehicle, and whether the vehicle can be stopped.
How the safe crossing signal works.
According to clause 8,
It further includes receiving a second crosswalk status from another safety crossing signal located opposite the crosswalk,
Determining the crosswalk status is,
Further comprising determining a final crosswalk state based on the first crosswalk state and the second crosswalk state.
How the safe crossing signal works.
According to clause 7,
To determine whether the event occurs,
Determine whether the crosswalk signal is green,
If the crosswalk signal is green, determine the presence or absence of the pedestrian,
If the pedestrian exists, determine whether the vehicle can stop at the stop line,
If the vehicle can stop at the stop line, determine whether the vehicle has stopped at the stop line,
If the vehicle cannot stop at the stop line or the vehicle does not stop at the stop line, it is determined that the event has occurred and an event occurrence signal is generated,
At least one of pedestrian event data according to the occurrence time of the event among the first pedestrian detection data, vehicle event data according to the occurrence time of the event among the first vehicle detection data, and video event data according to the occurrence time of the event. Further comprising transmitting to the server
How the safe crossing signal works.

Images