KR20220151592A - LED Assisting Safety System For Pedestrian - Google Patents

Abstract

The present invention relates to an LED walking assistance traffic light which is to prevent a traffic accident occurring in a crosswalk, wherein the traffic accident occurs since a pedestrian cannot check a crosswalk traffic light. The LED walking assistance traffic light enables the pedestrian to recognize the state of the crosswalk traffic light even when the pedestrian cannot check a signal of the crosswalk traffic light or walks while looking at a smartphone. More specifically, the LED walking assistance traffic light is installed by being buried on a road as an upper surface is formed as a reinforced transparent window to radiate LED light of the inside to the upper part. The LED walking assistance traffic light is operated by output voltage of 3V generated by photovoltaic power generation. The LED walking assistance traffic light includes: an assistance signal unit controlling flickering of the LED; and a control unit. The control unit is mounted on a signal control unit of the crosswalk traffic light and performs wireless connection to the assistance signal unit by detecting a signal pattern of the crosswalk traffic light. Multiple assistance signal units are installed. So, the wireless connection to the control unit is performed by Bluetooth technology. When the control unit transmits the signal, one of the assistance signal units receives the signal. The assistance signal unit transmits the signal to the other assistance signal unit.

Description

LED Assisting Safety System For Pedestrian}

The present invention relates to an LED walking assistance signal light intended to contribute to preventing a traffic accident occurring at a crosswalk caused by failing to check a pedestrian traffic light. In other words, pedestrians who cannot check the signal of the walking traffic light because they are covered by obstacles or who walk with their eyes on the ground while looking at their smartphone can recognize the state of the walking traffic light, so that they can recognize the state of the walking traffic light. It relates to an auxiliary traffic light device for a pedestrian traffic light that emits light.

Find out the background art cited in the present invention. In FIG. 5A, Registration Patent No. 1930933 (2018.12.13.) relating to a buried solar road marker is illustrated, a base embedded in the ground, a lower case inserted into the base and installed on top of the lower case In a buried solar road sign having a marker main body composed of an upper case and a solar cell, an LED module, and a storage battery inside the marker upper case, the upper end of the side wall of the lower case has a height increasing from the outer surface toward the inner surface. A first single layer composed of a plurality of single layers is formed, and at the lower end of the side wall of the upper case, the height decreases from the inner surface of the side wall to the outer surface so as to be in contact with the first single layer end of the lower case. Two single-layer stages are formed, and a barrier rib is formed that extends downward from the highest upper surface of the second single-layer stage and is formed to face the inner surface of the side wall of the lower case, and the lower end is formed at a position higher than the bottom surface of the lower case. , The waterproofing agent is injected and filled into the space between the inner surface of the side wall of the lower case and the outer surface of the partition, and the inner surface of the side wall of the lower case, the highest upper surface of the second single layer, the outer surface of the partition and the bottom surface of the lower case are formed. A waterproofing agent is filled in a space including a space formed by the inner surface of the bulkhead and the space to be filled.

In FIG. 5B, Patent Registration No. 825568 (2008.04.21.) related to a buried solar road marker is exemplified, and in the example of FIG. .28.) is provided.

However, the background art has a problem in that there is no configuration that interlocks with the walking traffic light. Here, the pedestrian traffic light is a device that signals pedestrians to cross the roadway. The pedestrian traffic light is installed on both sides of the crosswalk installed on the roadway and uses red and green lights to signal pedestrians to cross the roadway. Pedestrians usually cross the crosswalk by recognizing a pedestrian traffic light located on the other side of the crosswalk. In other words, a pedestrian waits adjacently inside a sidewalk block installed to separate a road from a sidewalk and crosses the crosswalk after checking the pedestrian traffic light on the opposite side. Recognition of pedestrian traffic lights may be delayed or missed, and pedestrians may lose their ability to distinguish in many cases where large vehicles invade the crosswalk and stop, blocking pedestrian traffic lights on the opposite side.

Regarding wireless communication, Patent Registration No. 1499979 (2015.03.02.) relating to a ZigBee device and its control method is disclosed in FIG. 4 . In addition, Patent Publication No. 51303 (May 18, 2011), Registered Patent No. 1335802 (November 26, 2013), or Utility Model Registration No. 470034 (November 15, 2013) related to a buried auxiliary signal light that turns on in conjunction with a pedestrian traffic light Registered Patent No. 1795358 (2017.11.02.) and the like are disclosed.

It is installed on a sidewalk block that is installed on the sidewalk to distinguish it from the roadway, and a lighted sidewalk block with a reinforced transparent window on the upper surface so that lamps or LED lights shine from the inside is proposed. It is proposed and used to allow pedestrians to recognize the signal of the walking traffic light by the lighting signal of the sidewalk block even if the pedestrian traffic light is covered by a large vehicle by installing it in conjunction with the pedestrian traffic light so that the light is irradiated to the upper part of the sidewalk block. have. However, the power line of the lighted sidewalk block is directly connected to the power line of the walking traffic light, and the power supplied by the power line of the walking signal light is branched to light the lighted sidewalk block. If it doesn't, you can't expect it to work.

Configuration and method of a system that can easily embed and construct individual pedestrian auxiliary signal lights without wired construction such as separate cables or wires for power supply by generating its own power using sunlight and interlocking with pedestrian traffic lights provides

It eliminates the influence of line failure in the connection of walking traffic lights and walking auxiliary signals, and guarantees the interlocking of walking traffic lights and walking auxiliary signal systems and walking auxiliary signals for this with high reliability. In order to further enhance the safety of pedestrians, the blinking time of auxiliary traffic lights is delayed or activated early.

In the present invention, the upper surface is composed of a reinforced transparent window so that the LED inside is illuminated upward and installed embedded in the road, and operates with an output voltage of 3V generated by photovoltaic power generation, Auxiliary signal for controlling the blinking of the LED unit; And a control unit; in the LED walking aid signal light comprising a,

The control unit is mounted in the signal control unit of the walking traffic light to detect the signal pattern of the walking traffic light and perform a wireless connection with the auxiliary signal unit,

When the green light on signal conversion state of the walking traffic light is detected, the time from the detected green light on start time is counted, and a control signal for turning on the green light of the auxiliary signal unit is sent out according to a preset lighting delay time. Accordingly, the green light of the auxiliary signal unit is turned on later than when the green light of the actual walking traffic light is turned on,

A plurality of auxiliary signal units are provided so that the wireless connection with the control unit is made using Bluetooth technology, and when a signal is transmitted from the control unit, one auxiliary signal unit receives it, and the one auxiliary signal unit transmits a signal to another auxiliary signal unit. It is provided in a manner of sequentially transmitting signals to the signal units.

Since the LED walking auxiliary signal light of the present invention transmits and receives control signals with the walking traffic light through wireless communication, it is possible to conveniently embed the individual walking auxiliary traffic lights without wired construction such as a separate cable or wire. In addition, it provides a safer means to pedestrians by adjusting the time period of the green light flashing while walking.

As the walking auxiliary traffic lights on the floor are illuminated in conjunction with the signal patterns of the walking traffic lights installed on the pillars, it is easy for users crossing the crosswalk to check the state of the signals. It produces its own power using sunlight without external power facilities and interlocks with pedestrian traffic lights.

First, in relation to the LED walking assistance signal light of the present invention, FIG. 1 is a diagram illustrating a walking assistance signal system and the entire system of the walking assistance signal light for this.
2 and 3 are block diagrams illustrating the entire system configuration of a walking assistance signal system and a walking assistance signal light therefor.
Hereinafter, it relates to the background art.
4 is an exemplary diagram showing a block diagram of a ZigBee device and a control method thereof.
5A is an exploded perspective view of a buried type solar road marker.
5B is an exploded perspective view of a buried solar road sign.
5C is a perspective view and an installed state view of the omnidirectional projection buried type solar road sign from the side.

The background technology related to the walking assistance traffic light system of the LED walking assistance traffic light will be looked at in more detail. Regarding the main body of the auxiliary signal unit 2200 constituting the walking assistance signal light 2000, FIG. 5B and the like can be cited. That is, a base having an installation groove and an O-ring groove completely embedded in the road surface; A cell case built into the installation groove and equipped with an LED holder; A solar cell mounted on the top of the cell case; PCB board and storage battery embedded in the lower part of the cell case; A plurality of LEDs installed obliquely in the LED holder; O-ring fitted into the O-ring groove; It includes a reflector inserted into the upper part of the installation groove and having a diffusion space made of an inclined surface facing the LED, and on both sides of the base, a buried groove is formed to firmly embed the base into the road surface, and the base is detachable from the upper part of the base. To facilitate this, a fixed ring is fastened with a plurality of bolts and embedded in a plane with the road surface, a plurality of anti-scratch protrusions are arranged at appropriate intervals on the upper surface of the reflector, and irregularities are formed on the inclined surface of the diffusion space. is a composition

In Figure 5C, the base buried in the ground; A cover body including an upper case, a lower case sealedly coupled to the upper case, a solar cell installed inside the upper case and the lower case, a battery substrate, and an LED module; It includes a fixing plate that is fastened to the base and presses the main body of the marker, and the outer surface of the upper case of the main body of the marker is provided with a third concave-convex surface that is inserted and coupled with the lower case, and the protruding and concave surfaces of the third concave-convex surface are inward. It can be seen that the inclined table is fixed, a fixed end portion is formed to prevent the lower case from moving, and an insertion groove is formed at the lower end of the third concave-convex surface, into which the upper end of the lower case is inserted and coupled.

In relation to the pedestrian assistance signal light (2000), in addition to the above, if it is a signpost or sign equipped with a solar rechargeable self-powered LED light emitting device of any other form, it can be cited as an element of the system configuration or method to be achieved by the present invention. .

Regarding the control unit 2110, a local area wireless communication network is cited. Bluetooth technology is known as such technology, but it is mainly used for small-capacity wireless transmission, for example, simple control signal transmission, because there is a limit to large-capacity information transmission (sharing).

Broadly, Wi-Fi (Wireless Fidelity), a series of technologies that support large-capacity wireless LAN (Wireless Local Area Network) connection through a router (Router, etc.), device-to-device connection (P2P), or PAN/LAN/WAN configuration Alliance) technology is provided. On the other hand, depending on the type of device or mode of use, Wi-Fi connects an AP (Access Point, LTE Router wireless router, etc.) that transmits wireless signals to a plurality of terminals (PCs, Smartphones, etc.) within a certain radius around it. It can be divided into an infrastructure mode in which data is exchanged, and an ad hoc mode in which terminals exchange data in a P2P form without an AP. In relation to direct communication between terminals without using an Internet line, a service called Wi-Fi Direct is provided.

In the present invention, Zigbee technology can be cited, and Zigbee is one of the technologies that can be widely used in a local area network with a radius of about 30 m. ZigBee has a low transmission speed and can be connected to a smartphone through the Internet. ZigBee is composed of ZigBee such as FFD (Full Function Device) capable of performing a network management function and RFD (Reduced Function Device) operated as an end device. Each ZigBee network is classified by network information such as PAN ID (Personal Area Network IDentification) and channel, and various network topologies are formed, enabling connection of many devices over a communication distance of 10 m to a maximum of 1 km.

An example of a network composed of ZigBee will be looked at. The example of FIG. 4 relates to a ZigBee device and a control method thereof. Depending on functional differences, the transmitting and receiving ZigBee devices perform a network management function and operate as a coordinator, an FFD; Alternatively, it may be composed of an RFD that does not perform a coordinator function, and stores a list of channels set for data transmission and reception between the first ZigBee communication unit and the second ZigBee communication unit that wirelessly transmit and receive data using the ZigBee communication method, and the receiving side ZigBee. a memory and a control unit that controls the first ZigBee communication unit to transmit and receive data with the receiving ZigBee, and determines whether or not there is an error in the wireless link using the second ZigBee communication unit when a data transmission/reception error occurs.

The first ZigBee communication unit and the second ZigBee communication unit include an antenna for ZigBee RF signal processing, an RF transmission/reception unit, and a pulse processing unit. The first ZigBee communication unit and the second ZigBee communication unit convert data to be transmitted into RF signals according to the ZigBee standard for transmission, and convert the received RF signals into data signals.

A list of channels agreed to be used between the transmitting ZigBee and the receiving ZigBee is stored in the memory. The IEEE 802.15.4 standard defining ZigBee allocates 16 channels in the 2.4 GHz band, 10 channels in the 902 MHz to 928 MHz band, and 1 channel in the 868 MHz to 870 MHz band. Accordingly, the channel list defines the order of channels to be used by both Zigbees in the event of a channel failure, and can be set and stored in each ZigBee during network configuration. It is also possible to mutually agree to set the two Zigbees when starting communication for the first time.

The control unit controls the first ZigBee communication unit and the second ZigBee communication unit to transmit and receive data with the receiving ZigBee. Here, the control unit may be configured to use the first ZigBee communication unit when transmitting and receiving data with the receiving side ZigBee. In addition, the control unit may set data to be transmitted and received between the first Zigbee communication unit and the second Zigbee communication unit when an error occurs in data transmission and reception. The controller controls the first ZigBee communication unit to establish Link A with the receiving ZigBee, and transmits/receives data through a channel negotiated with the receiving ZigBee. Accordingly, the control unit may set a data transmission/reception channel with the receiving side ZigBee using the channel set in the channel list.

The above ZigBee may take a modular form in which related components are gathered together, and may be provided as ZigBee modules 2111 and 2211 including an RF-Reciver for short-range communication and a dedicated processor (MCU).

1, 2 and 3 are mainly examined in relation to the present invention. The walking assistance signal system includes a walking traffic light 1000; A plurality of auxiliary signal units 2200 embedded in the floor around the crosswalk where the pedestrian traffic lights 1000 are installed; Of the control unit 2110 that binds and controls both by wireless communication; made up of components. In addition, the auxiliary signal unit 2200 and the control unit 2110 form the walking auxiliary signal light 2000 together. Here, the surrounding floor s20 of the crosswalk s10 becomes a position where a pedestrian looking at the floor, such as a sidewalk, a sidewalk block, or a road, can immediately recognize a change in a signal.

In addition to the original configuration for its own function, in addition to the original configuration for its own function, the walking traffic light 1000 to achieve the walking assistance signal system detects and selects the blinking state of the signal, and transmits it to the auxiliary signal unit 2200 through wireless communication to control it. A control unit 2110 to do so is connected to and mounted to the signal control unit 1200.

In order to form an organic system of the walking auxiliary signal light 2000, the control unit 2110 configured to transmit/receive wireless communication with the auxiliary signal unit 2200 detects the signal pattern of the walking traffic light 1000 and receives the input key a switch module 2112 that functions; A control ZigBee module 2111 that processes and transmits it through wireless communication; include The control ZigBee module 2111 includes a dedicated processor (MCU) for signal processing; an auxiliary signal unit 2200 side RF receiver 2211a and a control unit 2110 side RF receiver 2111a for data transmission and reception; consists of including

The function for selecting the LED light emitting module 2220 to be controlled according to the signal pattern of the detected walking traffic light 1000 or for selecting the brightness or color and the intensity of the selected function can be easily adjusted to the switch module 2112. You can also add and set these functions.

The control ZigBee module 2111 is for controlling by using short-range communication with the auxiliary signal ZigBee module 2211, transmits the control signal input by the above-described switch module 2112 through the RF receiver, and transmits the auxiliary signal It is used to receive control results from the ZigBee module 2211.

The auxiliary signal unit 2200 constituting the walking assistance signal light 2000 includes a housing that protects internal components; A solar power generation module 2230 that converts light energy from sunlight into electric energy, charges, stores, and supplies itself; An LED light emitting module 2220 that emits light to notify a walking signal so that a pedestrian can recognize it; A control module 2210 that receives power from the solar power generation module 2230 and interlocks with the walking traffic light 1000 through wireless communication to control the light emitting pattern of the LED light emitting module 2220 and blinks in synchronization; It is done. The walking traffic light 1000 is provided by mounting a signal display unit 1100 and a signal control unit 1200 controlling the signal display unit 1100 to a pillar erected on the floor.

More specifically, the solar power module 2230 is for supplying electricity generated through the photovoltaic device to the LED light emitting module 2220. In addition, predetermined power is supplied to the auxiliary signal ZigBee module 2211 and the controller 2212 to help control each LED light emitting module 2220. The power supplied here may be an example of an output voltage of 3V.

In the LED light emitting module 2220, a red or green walking signal is turned on according to the signal pattern of the walking traffic light 1000, and for this purpose, the LED light emitting module 2220 includes a red LED (R) and a green LED (G). It is composed by

The control module 2210 includes an auxiliary signal ZigBee module 2211 for transmitting a control signal to the LED light emitting module 2220; a controller 2212 for flickering and adjusting brightness and color; include

The auxiliary signal ZigBee module 2211 receives the signal pattern transmitted from the ZigBee module 2111 on the side of the pedestrian traffic light 1000 and receives the red LED or green LED of the LED light emitting module 2220 through the controller 2212 according to the received control signal. Control the flickering, brightness or color of the LED. To this end, the auxiliary signal ZigBee module 2211 includes a walking traffic light 1000 side RF receiver 2111a and an auxiliary signal unit 2200 side RF receiver 2211a for wireless communication; a dedicated processor 2211b on the side of the auxiliary signal unit 2200 that controls it and analyzes the signal pattern; include

The controller 2212 mainly controls the intensity of illumination (brightness) generated from the LED light emitting module 2220. This is a means for differently emitting light with a difference in illuminance in an environment where day and night intersect, and if such a means is not required, the controller 2212 can be omitted from the configuration. If the controller 2212 takes the digital method as an example, if the illuminance is divided into 10 steps, the 0 step indicates the power is OFF, that is, the light is turned off, and the 10 step indicates the LED light emitting module 2220 with the brightest illumination. means that it is on. Arbitrary color or shape patterns can be created by configuring the LED light emitting module 2220 with various color LEDs and turning on or off a specific color through the controller 2212.

In the wireless connection between the control unit 2110 mounted on the walking traffic light 1000 and several auxiliary signal units 2200, the control unit 2110 transmits one communication signal and sends it to several auxiliary signal units in a 1:N manner. (2200) can receive and process at the same time. Alternatively, processing may be performed in a manner in which one auxiliary signal unit 2200 is transmitted and received, and the auxiliary signal unit 2200 is sequentially transmitted to other auxiliary signal units 2200. Alternatively, each auxiliary signal unit 2200 can be controlled differently through the control unit 2110 by transmitting each different communication signal and allowing only a specific auxiliary signal unit 2200 corresponding to the communication signal to be received. have.

The LED walking assistance traffic light of the present invention provides a method of enhanced function control performed in the control unit 2110 to further improve pedestrian safety. To this end, the time from the start of the transition between the green light (green signal) and the red light (red signal) in the signal switching interval of the walking traffic light 1000 is counted, but the time is delayed by a previously set time. Provided is a walking assistance signal system that transmits a control signal by doing or preemptively. Hereinafter, it demonstrates in more detail.

In the control unit 2110, the lighting delay time for the green light of the auxiliary signal unit 2200 to be transmitted along with the green light of the walking traffic light 1000 is set in advance, and the signal of the walking traffic light 1000 The turn-off precedence time for the green light turn-off of the auxiliary signal unit 2200 according to the switching interval is set (set) in advance. This step is referred to as the delay and advance time setting step. Here, the turn-on delay time is a term (time, interval) in which lights are turned on later than the actual time by delaying turn-on, and the turn-off precedence time is a term in which turn-off is advanced and turned off. This lighting delay time and lights-out precedent time can be arbitrarily determined by the person in charge of management of related facilities according to the pedestrian environment of the road. Psychological preparation and pressure can be given so that pedestrians start walking on the crosswalk one or two beats late and finish walking on the crosswalk one or two beats earlier.

The place where these delay and advance time settings are performed is in the control ZigBee module 2111 of the control unit 2110. Alternatively, it may be made in the switch module 2112 as well. The signal switching interval refers to the time interval at which the signal pattern is switched, that is, the time taken for the green light (or red light) to change to the red light (or green light). The delay time refers to the time that is later than when the green light is turned on (on) among the signal patterns of the actual walking traffic light 1000 (delay time, delay time), and the preceding time refers to the time when the green light of the actual walking traffic light 1000 is turned off ( off) refers to a time earlier than

Thereafter, the control unit 2110 subtracts (subtracts) the precedent turn-off time preset by the person in charge of management from the green light term of the walking traffic light recording the time length of the green light among the signal patterns detected by the walking traffic light 1000. ) Recognize by adjusting the time to the green light on time. This step is referred to as the lights-out precedence adjustment step.

In addition, when the operation of the walking traffic light 1000 starts and the signal switching state is detected by the green light on from the signal control unit 1200 of the walking traffic light 1000, the time from the start of turning on the green light of the walking traffic light 1000 is counted. at the same time,

At the time of setting, a control signal is transmitted to turn on the green light of the auxiliary signal unit 2200 according to the delay time to which the preset lighting delay time is applied, and accordingly, the auxiliary signal unit 2200 is one beat later than the green light of the walking traffic light 1000. Green light is on.

And when the counting time elapses and reaches the time when the preset precedence time for turning off the lights is applied, a control signal is transmitted to turn off the green light of the auxiliary signal unit 2200, and accordingly, one beat faster than the green light of the walking traffic light 1000. The green light of the auxiliary signal unit 2200 is rapidly turned off.

In the case where the green light of the auxiliary signal unit 2200 is turned on sequentially or in a specific pattern (turned on and off), the auxiliary signal unit 2200 turns green between the turn-on delay time and the predetermined preceding time. It can be set and installed so that the flashing of the light is performed.

controller 2212; control unit 2110; Zigbee module 2111 (2211); switch module 2112; auxiliary signal unit 2200; control module 2210; LED light emitting module 2220; Solar power module 2230;

Claims (1)

The upper surface is composed of a reinforced transparent window to illuminate the LED inside, and is installed embedded in the road, and operates with an output voltage of 3V generated by photovoltaic power generation, and an auxiliary signal unit for controlling the blinking of the LED; And a control unit; in the LED walking aid signal light comprising a,
The control unit is mounted in the signal control unit of the walking traffic light to detect the signal pattern of the walking traffic light and perform a wireless connection with the auxiliary signal unit,
When the green light on signal conversion state of the walking traffic light is detected, the time from the detected green light on start time is counted, and a control signal for turning on the green light of the auxiliary signal unit is sent out according to a preset lighting delay time. Accordingly, the green light of the auxiliary signal unit is turned on later than when the green light of the actual walking traffic light is turned on,
A plurality of auxiliary signal units are provided so that the wireless connection with the control unit is made using Bluetooth technology, and when a signal is transmitted from the control unit, one auxiliary signal unit receives it, and the one auxiliary signal unit transmits a signal to another auxiliary signal unit. Provided by sequentially transmitting signals to the signal unit,
LED pedestrian auxiliary traffic light, characterized in that.

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