WO2022211192A1

WO2022211192A1 - Safety device for pedestrians in crosswalk

Info

Publication number: WO2022211192A1
Application number: PCT/KR2021/012123
Authority: WO
Inventors: 한성무
Original assignee: 주식회사 에스케이디 하이테크
Priority date: 2021-03-31
Filing date: 2021-09-07
Publication date: 2022-10-06
Also published as: KR20220135931A

Abstract

The present invention provides a safety device for pedestrians in a crosswalk, the device comprising: a pair of bodies; moving modules on both sides, a plurality of which are provided on both of the pair of bodies so as to be able to rise; blocking members connecting the moving modules on both sides; a flexible connection member that vertically connects the blocking members to each other; a drive unit that reduces the vertical spacing of the moving modules on both sides while raising same, and increases the vertical spacing of the moving modules on both sides while lowering same; and a diagnostic unit that diagnoses the presence or absence of abnormalities in an operation state on the basis of the speed or displacement of any one of the moving modules when rising.

Description

Pedestrian safety devices in crosswalks

The present invention relates to a pedestrian safety device used to prevent a pedestrian traffic accident in a crosswalk. More specifically, the present invention can prevent the problem that the blocking member that is operated to allow or block the pedestrian's crosswalk passage collides with the pedestrian, and it is possible to diagnose in advance whether the parts to be lifted are faulty and the replacement period It relates to a pedestrian safety device in a crosswalk having features, etc.

In general, a pedestrian safety device installed in a crosswalk includes a blocking member such as a rope, and by raising the blocking member to allow pedestrian crossing or lowering the blocking member to block pedestrian crossing. . Pedestrian safety devices in these crosswalks generally have the following problems.

The blocking member may collide with a pedestrian (or an obstacle) in the process of elevating or lowering, and damage may occur to parts elevating from the device or may injure a pedestrian due to a strong impact during the collision. In particular, in an emergency situation such as a power outage, the blocking member is not raised and maintained in a stationary state, so that pedestrians cannot quickly move and pass through. In addition, there is a structural limitation in that it is not possible to diagnose in advance mechanical malfunctions and failures caused by deformation, wear, etc. In addition, when a pedestrian crosses without permission while ignoring the red signal of a crosswalk, or when a vehicle crosses a crosswalk in violation of a traffic signal, the pedestrian is not notified of this in advance, so traffic accidents can occur frequently.

Prior patent documents related to the present invention include KR 20-0400235 Y1, KR 10-0601112 B1, KR 10-2006-0085852 A, JP 2008-534827 A, KR 10-1143843 B1, KR 10-2014-0007980 A, KR Reference may be made to 10-2014-0009813 A, KR 10-1471543 B1, KR 10-2015-0013410 A, KR 10-2015-0013411 A, KR 10-2019-0120482 A.

An embodiment of the present invention provides a pedestrian safety device in a crosswalk that can reduce or enlarge the vertical spacing of the remaining blocking members in the middle while the lowermost blocking member and the uppermost blocking member receive a driving force and ascend and descend among the blocking members want to

An embodiment of the present invention is to provide a pedestrian safety device for a crosswalk capable of forcibly raising the blocking members by canceling the connection state of the power when a power failure or a failure of the driving unit occurs.

The embodiment of the present invention measures the moving speed or position of the lifting blocking members and comparing them with a predetermined reference value to determine whether the blocking members collide with pedestrians, obstacles, etc., and damage and failure states of the lifting components We aim to provide a pedestrian safety device for crosswalks that can diagnose in advance.

An embodiment of the present invention is to provide a pedestrian safety device in the crosswalk that can prevent a traffic accident in advance by photographing a pedestrian in the crosswalk, detecting a vehicle on the road, and elevating the blocking members.

According to an embodiment of the present invention, at the end of the crosswalk, a pair of main bodies (refer to 110) installed on both sides at intervals along the width direction of the crosswalk; A plurality of moving modules (see 121 and 122) corresponding to each other are provided on both sides, and a plurality of moving units corresponding to each other are provided to be liftable on a pair of the main body, respectively, in a state in which the moving modules are arranged in the vertical direction (see 120) )class; a pair of blocking members (refer to 130) for connecting a plurality of the moving modules corresponding to each other between a pair of the main body; a flexible type connecting member (see 140) connecting the blocking members up and down to each other; a driving unit 150 that raises the plurality of corresponding moving modules and reduces or lowers the vertical spacing and increases the vertical spacing; A pedestrian safety device in a crosswalk may be provided, including a diagnostic unit (see 160) for diagnosing whether an operating state is abnormal based on the speed or displacement amount during lifting for any one of the plurality of moving modules. At this time, since the moving modules on both sides are connected to each other by the blocking members, the blocking members can be raised and lowered together with the moving modules. Of course, when the blocking members are raised, the passage of the pedestrian is allowed, and when the blocking members are lowered, the passage of the pedestrian can be blocked.

In the pedestrian safety device of a crosswalk according to an embodiment of the present invention, a plurality of rails (refer to 111) for guiding the elevation of the moving module corresponding to each other may be provided on a pair of the main body in the vertical direction, respectively, and the pedestrian It may further include a pedestrian detection sensor 112 for detecting whether a pair of the main body is present.

Each of the plurality of moving modules corresponding to each other, each of the rollers (see 121) that can move up and down along the rails on both sides; It may include a moving body 122 for supporting the rollers on both sides to be rotatable (ie, rolling motion), respectively. Each of the blocking members may be respectively connected to the moving body on both sides of the moving module, both of which correspond to a plurality of each other.

The blocking members may be configured to have a hard structure (eg, a hard synthetic resin bar, etc.) or may be configured to have a soft structure (eg, a rubber rope, etc.). When the blocking members are configured to have a soft structure, each of the moving body and the blocking member connected to each other uses an elastic force to apply tension to the blocking member via an elastic body (eg, a tension coil spring). can be connected

The driving unit may include a driving module that reduces or enlarges the vertical spacing of one of the moving modules while raising and lowering one of the moving modules among the moving modules on both sides connected to each other by the blocking members.

The driving module includes: a driving motor (see 151) provided on the upper end of the main body on the one side provided with the moving modules on the one side; a first pulley mounted on a motor shaft of the driving motor; a first belt (152a) having one end connected to the lowermost moving module among the moving modules while being caught on the first pulley; a weight (see 152b) connected to the other end of the first belt; an upper pulley (refer to 153U) mounted on the motor shaft; a lower pulley (refer to 153L) provided at the lower end of the main body on one side and paired with the upper pulley; It may include a second belt (refer to 153a) connected to the uppermost moving module among the one of the moving modules in a state of being caught on the pair of the upper pulley and the lower pulley.

The driving module may further include a clutch. The motor shaft may be divided into a straight drive shaft and a driven shaft, and the drive shaft and the driven shaft may be interrupted by the clutch. The driving shaft may be rotated by the driving motor, and the first pulley and the upper pulley may be mounted on the driven shaft.

The first pulley may have a larger diameter than that of the upper pulley and the lower pulley.

The driving unit may further include a driving module for reducing or enlarging the vertical distance between the moving modules on the other side while elevating the other moving modules among the moving modules on both sides connected to each other by the blocking members. have. The driving modules on one side and the other side may be configured identically to each other and may be operated at the same time.

Whether the driving unit includes only one of the driving modules or both of the driving modules may be determined in consideration of the characteristics of the blocking members. For example, if the blocking members are configured to have a rigid structure, the driving unit may include only one of the driving modules on both sides. On the contrary, if the blocking members are configured to have a soft structure, the driving unit may include both of the driving modules.

The first pulley, the upper pulley, and the lower pulley may be replaced with a sprocket wheel instead of a pulley, and the first belt and the second belt may be replaced with a chain instead of a belt.

The diagnosis unit measures an amount of speed or displacement at the time of lifting or lowering of one of the moving modules, compares the measured value with a predetermined reference value, and when the measured value deviates from the reference value, It may be determined that there is an abnormality in the lifting operation state. Furthermore, the diagnosis unit may control the operation of the driving unit or store or transmit an abnormal state to the manager according to the determination result. For example, the diagnostic unit may include a diagnostic sensor 161 and a reflective member (refer to a measurement plate 162 ) to acquire the measurement value. That is, the diagnosis unit includes: the reflective member provided in any one of the moving modules; The diagnostic sensor is provided on one side of the main body and has a light emitting unit for irradiating light to the reflective member and a light receiving unit for receiving light reflected from the reflective member. Of course, since the reflective member is moved together when the moving modules are raised and lowered, the reflective member may be spaced apart from or approached from the diagnostic sensor.

Pedestrian safety device of a crosswalk according to an embodiment of the present invention may further include a pedestrian safety unit. The pedestrian safety unit includes: a pedestrian photographing unit 170 for transmitting an image signal by photographing a pedestrian waiting for a crosswalk or passing a crosswalk; a vehicle detection unit 171 for detecting a vehicle approaching the crosswalk; a traffic light linkage 172 for operating the driving unit 150 in connection with a traffic light installed in a crosswalk; Safety signal output that outputs a hazard signal visually (eg light) or audible (eg voice) when a pedestrian passes a crosswalk at a red light signal or a vehicle approaches a crosswalk at a green light signal It may include a part 173 .

According to an embodiment of the present invention, it has the effect of allowing or blocking pedestrian crossing by reducing or expanding the vertical spacing of the blocking members. In addition, when a power failure or a failure of the driving unit occurs, the blocking members are forcibly raised to allow pedestrians to pass without interference. In addition, it is possible to measure the moving speed or position of the lifting blocking member and compare it with a predetermined reference value to check whether there is a collision with pedestrians or obstacles when a change occurs, as well as to diagnose damage and failure of parts in advance. has In addition, it has the effect of preventing in advance a traffic accident that occurs when pedestrians and vehicles violate traffic signals by photographing pedestrians in the crosswalk and detecting vehicles on the road.

1 is a configuration diagram schematically showing a pedestrian safety device in a crosswalk according to an embodiment of the present invention.

FIG. 2 is a front view specifically illustrating part A of FIG. 1 .

FIG. 3 is a side view specifically illustrating part A of FIG. 1 .

4 is a plan view specifically illustrating a portion A of FIG. 1 .

5 and 6 are diagrams schematically showing a driving unit of a pedestrian safety device for a crosswalk according to an embodiment of the present invention.

7 shows a state in which the moving modules corresponding to each other are raised in the state of FIG. 2 to reduce the vertical spacing of the blocking members.

8 is a block diagram illustrating a diagnosis unit and a pedestrian safety unit of a pedestrian safety device for a crosswalk according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The configuration of a pedestrian safety device for a crosswalk according to an embodiment of the present invention is shown in FIGS. 1 to 8 .

Pedestrian safety device 100 of a crosswalk according to an embodiment of the present invention, a pair of main bodies 110 installed on both sides along the width direction of the crosswalk in the crosswalk; a moving unit 120 having a plurality of moving modules (see 121 and 122) formed to be lifted and lowered, respectively, on the inside or one side of the main body 110; a plurality of blocking members 130 formed to connect the moving modules on both sides facing each other in a horizontal direction; a connecting member 140 forming the blocking members 130 to be connected to each other in a vertical direction; A driving unit 150 for blocking the pedestrian by reducing the vertical spacing while raising the plurality of moving modules to secure a space for pedestrians to pass without interference, and by extending the vertical spacing while lowering the plurality of moving modules on the contrary; By measuring the amount of change in the lifting speed or position of any one of a plurality of moving modules, it is possible to diagnose in advance whether there is a collision between the blocking members 130 and a pedestrian or an obstacle, and whether there is an abnormality in the lifting operation such as damage and malfunction of parts. and a diagnostic unit 160 configured to be there.

A pair of the main body 110 is installed to face each other at a designated location, such as the end of a crosswalk. A pair of the main body 110 is disposed at a predetermined interval (eg, an interval corresponding to the width of the crosswalk) so as to be spaced apart from each other along the width direction of the crosswalk, and face each other in the right and left sides. The pair of main body 110 may be a post having a predetermined height extending long in the vertical direction.

A plurality of

moving modules

121 and 122, including the rail 111 formed in the vertical direction on the inside of the body 110, may be guided to move up and down smoothly and accurately.

By including various types of pedestrian detection sensors 112 such as infrared sensors and area sensors on the inside or one side of the body 110 to face the direction in which pedestrians pass, the blocking members 130 are detected by detecting pedestrians or obstacles. can elevate.

In addition, as shown in Figure 4, in the plurality of moving modules (see 121 and 122), half of the rail 111 elevates along the rear, the other half can elevate along the front of the rail 111. . That is, as shown in FIG. 2 , the moving modules moving along the rear of the rail 111 and the moving modules moving along the front of the rail 111 are positioned in a zigzag form with each other, so that the blocking member 130 is It is possible to minimize the vertical gap in the raised state.

The moving module includes: a roller 121 formed to be movable in an up-down direction along the rail 111; and a moving body 122 formed on one side of the roller 121 , and the device 100 includes an elastic body 131 formed between the moving body 122 and the blocking member 130 to block the blocking member 130 . can maintain its tension. The elastic body 131 may be a spring or the like.

The blocking member 130 is configured to block pedestrians, and as well as a hard material, rubber or synthetic resin material is coated on the outer diameter of the rope, etc. to prevent corrosion, as well as to minimize safety accidents when colliding with pedestrians. material can be applied.

The connecting member 140 is formed to connect the plurality of blocking members 130 to each other in the vertical direction, so that when the plurality of blocking members 130 rise, it is bent so as to reduce the vertical distance between the blocking members 130 and vice versa. When the plurality of blocking members 130 descend, the blocking members 130 perform a role of maintaining the vertical spacing of the blocking members 130 while unfolding.

The connecting member 140 is formed of a soft material such as synthetic resin or rubber having a predetermined length to ensure flexibility according to the vertical spacing of the blocking members 130 .

The driving unit 150 increases the plurality of moving modules (see 121 and 122) sequentially and reduces the vertical spacing to secure a space for pedestrians to pass without interference, and conversely extends the vertical spacing while lowering the plurality of moving modules. It serves to block pedestrians. The driving unit 150 can be connected to and interlocked with a traffic light installed in the crosswalk to elevate the blocking member 130 to pass or block the pedestrian, and the pedestrian can selectively operate it through a separate manual button.

The driving unit 150 includes a motor 151 formed on one upper side of the main body 110 as shown in FIGS. 5 and 6 ; a first rotating body 152 formed on the motor shaft of the motor 151; a first connector (152a) circulating the outside of the first rotating body 152 to form one end to be connected to the moving module located at the lowermost side among the plurality of moving modules (see 121 and 122); a weight body 152b formed at the other end of the first connector 152a; A pair of second rotating bodies 153 formed on the lower side of the motor shaft and the main body 110 of the motor 151 and; a second connector (153a) formed to circulate the outside of the second rotating body (153) to connect with the moving module located at the uppermost side among the plurality of moving modules; and a clutch 154 formed between the motor 151 and the first rotating body 152 and the second rotating body 153 . The second rotating body 153 is composed of an upper rotating body (153U) and a lower rotating body (153L) forming a pair with each other.

As the motor 151, various types such as a server motor may be applied, and a required rotation speed may be secured using a reducer.

The first rotating body 152 and the second rotating body 153 are sprocket wheels or pulleys having various specifications, and the first connector 152a and the second connector 153a are applied as a chain or belt. Thus, it is possible to receive the driving force of the motor 151 to sequentially elevate the moving

modules

121 and 122 .

Here, the diameter of the first rotation body 152 is preferably formed to be larger than the diameter of the second rotation body 153 , which is the first rotation body 152 and the second rotation body 152 by the operation of the motor 151 . 2 When the rotating body 153 is rotated forward at the same time, the rising speed of the moving module located at the bottom among the plurality of moving modules (see 121 and 122) is faster than the rising speed of the moving module located at the top among the plurality of moving modules. Therefore, the remaining moving modules are lifted sequentially to secure a space for pedestrians to pass without interference.

Conversely, when blocking the passage of pedestrians, the first rotating body 152 and the second rotating body 153 are simultaneously reversely rotated. Then, since the lowering speed of the lowest moving module among the plurality of moving modules (see 121 and 122) is faster than the lowering speed of the uppermost moving module among the plurality of moving modules, the remaining moving modules are lowered by their own weight and the blocking member 130 ) are expanded to block pedestrian crossings. At this time, when the uppermost moving module among the plurality of moving modules (see 121 and 122) is stopped at a designated position, the remaining moving modules positioned below the uppermost moving module are further lowered in a state supported by the connecting member 140 . You can keep the upper and lower distances from each other without it.

In addition, the clutch 154 normally transmits the driving force of the motor 151 to the first rotating body 152 and the second rotating body 153 to include a plurality of moving modules (see 121 and 122) and a blocking member ( 130), and release the coupling force of the clutch 154 in an emergency situation such as a power failure or a failure of the motor 151 so that the first rotating body 152 and the second rotating body 153 are in the idle state. As the weight body 152b descends by its own weight, the plurality of moving modules and the blocking member 130 are raised so that a pedestrian can move and pass quickly.

On the other hand, the diagnosis unit 160 measures the elevating speed or position of any one of the moving

modules

121 and 122 for elevating and descending, and the pedestrian or obstacle previously stored in the central processing unit 174 . When a change occurs compared with the reference data (reference value) that goes up and down without colliding with a pedestrian or an obstacle, it is diagnosed that a collision with a pedestrian or an obstacle has been diagnosed, and a plurality of moving modules and blocking members 130 are stopped or raised to collide with a pedestrian or an obstacle. In doing so, accidents can be minimized.

Diagnosis unit 160, when deformation and abrasion of the moving modules (see 121 and 122) that repeatedly elevate and abrasion occurs, and foreign substances are attached to the rail 111, the reference data for smoothly elevating and lowering previously stored in the central processing unit 174 and In comparison, since the speed or position (displacement) of the moving module is not constant and irregular when elevating, it can be diagnosed and a self-diagnosis function can be performed to prepare for mechanical malfunctions and failures in advance. In this case, the reference data is used by storing the time or speed at which the mobile unit 120 constantly ascends and descends without collision and interference, and stores it in the central processing unit 174 .

The diagnostic unit 160 for this purpose includes a diagnostic sensor 161 formed on the inner upper portion of the main body 110; It includes a measuring plate 162 formed on one side of any one of the moving modules (see 121 and 122) of the plurality of moving modules. As the diagnostic sensor 161 , various sensors such as a laser sensor or an infrared sensor may be applied. The measuring plate 162 reflects the light generated from the diagnostic sensor 161 and serves as a reference for measuring the rising/lowering speed and position of the moving

modules

121 and 122 . Therefore, as shown in FIG. 3 , the diagnostic unit 160 emits light toward the measurement plate 162 by the operation of the diagnostic sensor 161 , and the light collides with the measurement plate 162 and is again As reflected by the diagnostic sensor 161, the amount or speed of reflection of light and the reference data are compared to check whether the mobile unit 120 and the blocking member 130 collide with pedestrians or obstacles, as well as damage and breakdown of parts. can be diagnosed in advance.

The present invention includes a pedestrian safety unit as shown in FIG. 8, wherein the pedestrian safety unit includes: a pedestrian photographing unit 170 that transmits an image signal by photographing a pedestrian waiting or passing at a crosswalk; a vehicle detection unit 171 for detecting a vehicle approaching the crosswalk; a traffic light linkage 172 for operating the driving unit 150 in connection with a traffic light installed in a crosswalk; A safety signal output unit 173 for outputting a danger signal with light or voice when a pedestrian passes a crosswalk at a red light signal or a vehicle approaches a crosswalk at a green light signal.

At this time, the pedestrian photographing unit 170 installs at least one camera on one side of the main body 110 or the crosswalk to photograph the pedestrian located in the periphery of the crosswalk, and in the process of the blocking member 130 ascending and descending. Inducing not to collide with pedestrians, and when the pedestrian crosses the crosswalk and changes to a red light signal in the process of walking to the opposite side, the blocking member 130 maintains an elevated state without descending so that the pedestrian can pass the crosswalk to control the driving unit 150 so as to

Here, the pedestrian photographing unit 170 converts the image signal photographed by the pedestrian into a digital signal and transmits it to the central processing unit 174 by wire or wireless.

On the other hand, the vehicle detection unit 171 detects a vehicle approaching the crosswalk using a laser sensor or a camera and transmits it to the central processing unit 174, and the central processing unit 174 controls according to the transmitted data to protect the pedestrian In order to do this, the driving unit 150 is operated so that the blocking member 130 can be raised and lowered.

Then, the traffic light interlocking unit 172 receives the control signal of the previously installed traffic light and transmits it to the central processing unit 174, and the central processing unit 174 controls the driving unit according to the red or green light signal of the transmitted traffic light. By operating 150 , the blocking member 130 may be raised and lowered.

In addition, the safety signal output unit 173 is connected to the central processing unit 174, and the pedestrian crosses the red light signal without permission, shakes the blocking member 130, or forcibly lifts the blocking member 130. When an action is taken, the central processing unit 174 may control the safety of pedestrians through a light such as a warning light or an alarm sound and a warning voice.

The central processing unit 174 is connected to the pedestrian detection sensor 112 , the motor 151 , the clutch 154 , and the diagnostic sensor 161 so that when a pedestrian is located between the pair of the main body 110 , the pedestrian detection sensor 112 detects this, the blocking member 130 stops lifting and lowering, and the operation of the safety signal output unit 173 may control the pedestrian to retreat backward. The central processing unit 174 detects the amount of change in the current of the motor 151 and, when a failure occurs, can diagnose in advance whether there is a failure or the like according to the amount of current that changes, and applies power to the clutch 154 to control the motor 151 . The blocking members 130 are raised and lowered by transmitting power, and the coupling state of the clutch 154 is canceled in a power failure or emergency situation to induce the blocking members 130 to rise.

In the device 100, the central processing unit 174 is connected to the pedestrian photographing unit 170, the vehicle detection unit 171, and the traffic light linkage unit 172, and calculates and processes the received data to detect pedestrians and vehicles in advance of a traffic accident. can be prevented in The central processing unit 174 may be connected to a photovoltaic generator installed on one side of the main body 110 and an uninterruptible power supply (UPS) to receive power.

On the other hand, the device 100 may be installed for the purpose of allowing or blocking the passage of passengers in a subway or train platform as well as a crosswalk.

Claims

A pair of main bodies 110 installed on both sides of the crosswalk; A plurality of moving units 120 formed to be lifted on the inside or one side of the main body 110; a blocking member 130 forming the mobile units 120 on both sides facing each other to be connected in a horizontal direction; a connection member 140 forming a plurality of blocking members 130 to be connected to each other in a vertical direction; To block the pedestrians by reducing the vertical spacing while raising the plurality of mobile units 120 to secure a space for pedestrians to pass without interference, and by extending the vertical spacing while lowering the plurality of mobile units 120 conversely drive unit 150; By measuring the amount of change in the lifting speed or position of any one of the plurality of mobile units 120, the presence or absence of collision between the blocking member 130 and pedestrians or obstacles and damage and failure of parts can be diagnosed in advance. Pedestrian safety device of a crosswalk, characterized in that it comprises a diagnostic unit (160).
The method according to claim 1, Pedestrian safety device for a crosswalk, characterized in that it comprises a pedestrian detection sensor 112 formed to face the direction in which the pedestrian passes on the inner side or one side of the main body (110).
The method according to claim 1, The moving unit 120, The roller 121 formed to move in the vertical direction along the rail 111 formed in a vertical direction on the inside or one side of the main body (110); a moving body 122 formed on one side of the roller 121; Pedestrian safety device for crosswalk, characterized in that it comprises an elastic body (131) formed between the movable body (122) and the blocking member (130).
The method according to claim 1, The driving unit 150, The motor 151 formed on one upper side of the main body (110); a first rotating body 152 formed on the drive shaft of the motor 151; a first connector (152a) circulating the outside of the first rotating body (152) to form one end to be connected to the moving unit (120) located at the lowermost position among the plurality of moving units (120); a weight body (152b) formed at the other end of the first connector (152a); a pair of second rotating bodies 153 formed on a lower side of the driving shaft of the motor 151 and the main body 110; a second connector (153a) formed to circulate the outside of the second rotating body (153) to connect with the moving unit (120) located at the uppermost part of the plurality of moving units (120); Pedestrian safety device for pedestrian crossing, characterized in that it comprises a clutch (154) formed between the motor (151) and the first rotating body (152) and the second rotating body (153).
The pedestrian safety device of claim 5, wherein the diameter of the first rotation body (152) is larger than the diameter of the second rotation body (153).
The method according to claim 1, wherein the diagnostic unit (160) comprises: a diagnostic sensor (161) formed on the inner upper portion of the main body (110); Pedestrian safety device of a crosswalk, characterized in that it comprises a measuring plate 162 formed on one side of any one of the plurality of the mobile unit (120).
The method according to claim 1, further comprising a pedestrian safety unit, the pedestrian safety unit, a pedestrian photographing unit 170 for transmitting an image signal by photographing a pedestrian waiting or passing in a crosswalk; Vehicle detection unit 171 for detecting a vehicle approaching the crosswalk; a traffic light linkage 172 for operating the drive unit 150 in connection with a traffic light installed in a crosswalk; Pedestrians of a crosswalk, characterized in that it includes a safety signal output unit 173 that outputs a danger signal with light or sound when a pedestrian passes the crosswalk at the red light signal or the vehicle approaches the crosswalk at the green light signal safety device.