KR20070013510A - System for detecting emergency enviroment in train platform - Google Patents

Abstract

A system for automatically detecting and notifying accidents in a platform is provided to send out a warning message according to the dangerous situation of passengers or workers and to transmit an emergency stop order and a warning message to an operator of a train by generating an ATC(Automatic Train Control device) stop code or an ATS(Automatic Train Stop device) code. A system for automatically detecting and notifying accidents in a platform(103) includes: a safety line detector(107) for notifying a safety line detection state of the platform; an infrared image sensing device(109) for extracting an infrared image signal for an object existing on a railroad(111) and judging whether the object is a human body or not; a transmitting/receiving device(115) for loading a safety line detection signal and a human body sensing signal to wire/wireless networks(117) according to a predetermined protocol; a management server(119) generating an access warning signal correspondent to the safety line detection signal and a fall warning signal correspondent to the human body sensing signal; and an MC(Master Clock) device(121) starting a broadcasting system(127) in response to the access warning signal to send out a guide message to the platform, notifying an emergency state to the broadcasting system and a mobile communication terminal(123) in response to the fall warning signal, and transmitting the warning message to the entering train by using a signal device(125).

Description

Automatic detection and notification system of platform accidents {SYSTEM FOR DETECTING EMERGENCY ENVIROMENT IN TRAIN PLATFORM}

1 is a block diagram showing an entire system according to the present invention.

FIG. 2 is a block diagram illustrating the infrared image sensing device of FIG. 1.

3 is a block diagram showing the safety line detection device of FIG.

<Explanation of symbols for main drawings>

103: platform 105: safety line detection line

107: safety line detection device 109: red line video detection device

111: railway 113: signal transmission means

115: transceiver 117: wired and wireless network

119: management server 121: MC device

123: portable terminal 125: signaling device

127: broadcast system 201: Fresnel lens

203: infrared sensor 205: infrared signal amplifier

207: digital signal processing unit 209, 311: communication unit

301: frequency generator 303: impedance measuring unit

305: signal amplification unit 307: control unit

309: memory

The present invention relates to a system for detecting an unexpected accident of a platform of a tracked vehicle. More particularly, by identifying an object entering into the platform of a tracked vehicle by using an infrared camera, it is possible to efficiently cope with a sudden situation. It is to provide an automatic detection and notification system of platform accidents.

The current subway / railway platform is marked with a safety line indicating the safety distance the passengers and the vehicle must maintain until the vehicle has been entered or departed. This prevents an accident where a passenger is too close to the track where the vehicle enters, bumping into the vehicle entering, being caught in the gap between the vehicle and the platform, or crashing into the vehicle entering the platform track.

Accordingly, during entry and departure of the vehicle, passengers must pay attention to the vehicle by keeping the safety line or by the horn and announcement of the vehicle. In addition to installing alarms and announcements to inform the entry and departure of the vehicle, cameras and monitors are installed around the platform to allow the driver of the vehicle to check the status of the platform. have. Nevertheless, carelessness or other unforeseen reasons may lead to accidents in which passengers may fall onto the platform tracks or be caught in gaps in the vehicle or between the vehicle and the platform.

In order to respond in real time to the hazards such as the actual falling objects and accidents caused by people's fall, the facility aspect of the current subway / railway platform and the manual alarm system is very insufficient.

The name of the present invention in order to solve the above-mentioned problem; The automatic detection image processing alarm system and method of the unexpected situation of subway / railway platform protects the safety of passengers by using the image sensing camera. On the basis of the above document, an automatic detection image processing alarm system of an emergency situation of a platform is as follows.

First, at least one is provided, which is composed of a control camera that is installed at different locations to continuously shoot the image of the designated surveillance zone at each position, and a video sensing camera to detect the changes occurring in the designated surveillance zone An imaging device; An image distribution device connected to the image pickup devices to apply an operation control signal of the image pickup device to the image pickup device, and receive an image captured by the image pickup device, and transmit the captured image to a station office, a situation command room, and each component for processing the captured image signal; An image conversion device for converting an analog image signal received from the image distribution device into a high resolution digital image signal; The digital video signal converted from the video conversion device is processed based on the automatic sensing image processing algorithm to automatically detect the hazards of vehicle driving in the platform, the fall of life and other accidents in the platform, and to detect the video signal information of the unexpected situation. It includes an image processing device for immediately generating an alarm signal comprising.

In addition, an alarm controller for receiving an alarm signal including the image signal information from the image processing apparatus has a sudden situation and transmits an alarm control signal including the image signal information of the sudden situation to the station office, the situation command room and the vehicle; A predetermined division is performed so that a plurality of video signals captured by the imaging device can be integrated and displayed on a predetermined number of monitors, and a video signal having a sudden situation is selected from the divided video signals according to the alarm control signal from the alarm controller. A video splitting device for releasing; A wireless transmission device for wirelessly transmitting a video signal received from the video splitting device and a video signal in which an unexpected situation is received from the video splitting device; An on-vehicle device for receiving an image signal generated by a sudden situation transmitted from the wireless transmission device and displaying the same; And a controller configured to analyze and process a plurality of images photographed from the image pickup device to control an operation of each component to automatically detect and alert an accident situation when a landing accident occurs.

Accordingly, the above-described automatic alarm image processing alarm system of the platform provides a number of passengers and subway / railway facility operators and managers with the advantage of providing a safe traffic environment in the public safety and operation and management of the facility. Doing.

However, the image processing alarm system configured as described above recognizes an unexpected situation for a passenger entering the platform, but an image processing algorithm for determining a passenger or an object or a predetermined animal entered into the platform through the image processing process. Since the equipment is operated with expensive equipment, the burden on the equipment cost is high. That is, the image processing algorithm for determining the authenticity of a specific subject requires not only a high resolution image camera, but also pointed out that the facility investment cannot be made because the software of the algorithm itself is expensive.

The present invention was created to solve the above problems, and an object of the present invention is to reduce the installation cost of the system to recognize and notify the platform sudden situation of the track vehicle can easily realize the spread of safety facilities It is to provide an automatic situation detection and notification system.

Another object of the present invention is to provide an automatic detection and notification system for an unexpected accident situation of a platform, by which the identification power of an unauthorized entry into the platform is increased, so that unnecessary dangerous situations are not notified.

Still another object of the present invention is to provide an automatic detection and notification system for an unexpected accident situation of a platform which can determine the authenticity of the human body based on the rate of change of energy distribution of the subject detected by the infrared camera, thereby improving the stability and reliability of the system.

The platform accident detection and notification system according to an aspect of the present invention for achieving the above object, in the system for warning the dangerous situation in the platform of the track train, detects a dangerous approach state of the passenger entering the platform A safety line detecting device for notifying a safety line detecting signal to the safety line; At least one infrared image sensing device for extracting an infrared image signal of a subject that has entered or fallen without permission on a railroad line, and determining an authenticity of the human body with respect to the infrared image signal and notifying a human body detection signal thereof; A transceiver for receiving the safety line detection signal and the human body detection signal based on a predetermined signal transmission means and for mounting the safety line detection signal and the human body detection signal to a wired or wireless network according to a predetermined protocol; A management server connected to the wired / wireless network, collecting and managing information received from the transceiver, generating an access alarm signal corresponding to the safety line detection signal, and generating a fall alarm signal corresponding to the human body detection signal; And starting a broadcast system for announcement broadcasting into a platform in response to the approach alarm signal, providing a warning message to a portable terminal provided to an on-site worker, and risking the broadcast system and the portable terminal in response to the fall alarm signal. It is characterized by consisting of a MC (Master Clock) for notifying the situation, and providing an alarm message to the incoming train using the signal device.

According to a preferred embodiment of the present invention, the safety line detection device is a safety line detection line provided on the safety line of the platform and the line detection signal detected by the safety pre-detection line, and the safety line detection for transmitting it to the transmission and reception device It is characterized by consisting of a device.

In addition, the safety line detection device includes a frequency generator for supplying an induced frequency of a predetermined band to the safety line detection line; An impedance measuring unit for measuring an impedance of a frequency induced in the safety line detecting line; A signal amplifier for amplifying the output signal of the impedance measuring unit to a predetermined level; A controller for determining whether a change in impedance sensitivity provided by the signal amplifier reaches a reference value and generating a safety line detection signal according to a determination result; A memory for storing reference value information corresponding to the impedance sensitivity information corresponding to the reference value and the unique number information of the safety line detection device; And a communication unit for transmitting the safety line detection signal according to a predetermined protocol, including the unique number information of the safety line detection apparatus.

The infrared image sensing unit may include an infrared camera including a Fresnel lens and an infrared sensor; An infrared signal amplifier for amplifying the infrared signal detected by the infrared sensor to a predetermined level; A digital signal processor (DSP) for determining an authenticity of a human body based on an infrared energy distribution ratio of a subject based on an infrared signal provided by the infrared signal amplifier; And a communication unit for transmitting the result information according to the human authenticity determination to the transceiver.

The digital signal processing unit may include a digital filter circuit for removing noise of an infrared signal and extracting a linear phase characteristic, and a signal conversion circuit for performing frequency analysis corresponding to satellite characteristics of the digital signal. The circuit uses a Finite Impulse Response (FIR) filter or an Infinite Impulse Response (IIR) filter, and the signal conversion circuit is characterized in that a Discrete Fourier Transform or Fast Fourier Transform is applied.

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

1 is a block diagram showing a platform accident detection and notification system according to the present invention. As shown, a safety line detection device for detecting a dangerous approach state of the passenger entering the platform and notifies the safety line detection signal for this, and extracts the infrared image signal for the subject to enter or fall on the railroad 111 And at least one infrared image detecting device 109 for determining the authenticity of the human body with respect to the infrared image signal and notifying the human body detecting signal thereof, and the safety line detecting signal and the human body detecting signal with predetermined signal transmission means 113. And a transmission / reception device 115 for receiving the safety wire detection signal and the human body detection signal into the wired / wireless network 117 according to a predetermined protocol, and connected with the wired / wireless network 117 and transmitting / receiving the Collect and manage the information received from the device 115, generate an access alarm signal corresponding to the safety line detection signal, The management server 119 for generating a fall alarm signal corresponding to the human body detection signal, and in response to the approach alarm signal, start a broadcast system 127 for guidance broadcasting into a platform, and provide a mobile terminal to a field worker ( 123 to provide a caution alert message, to notify the broadcast system 127 and the mobile terminal 123 of a dangerous situation in response to the fall alert signal, and to send an alert message to the inbound train using the signal device 125. It is composed of a MC (Master Clock) (121) for providing.

The safety line detection device extracts the line detection signal detected by the safety line detection line 105 and the safety pre-detection line 105 provided on the safety line of the platform 103, and transmits it to the transmission / reception device 115. It includes a safety line detection device 107 for. The safety line detecting device 107 sets the safety line detecting line 105 to a closed circuit and provides a predetermined frequency signal to the safety line detecting line 105. Therefore, when the human body approaches the safety line detection line 105, the safety line detection device 107 detects the impedance sensitivity change rate.

The impedance sensitivity change rate is due to the electric field change caused by the interaction between the electric field induced in the safety line detection line 105 and the human body, and the safety line detection device 107 determines whether the magnitude of the impedance sensitivity change rate reaches a reference value. Recognize passengers at risk. Here, the safety line detection line 105 is to be installed at the interface between the train entry path and the platform 103, to determine whether the position of the passenger is a dangerous area based on the line detection signal.

According to another embodiment of the present invention, the safety line detection line 105 may be a predetermined sensor using a physical switching, for example, a load cell, a pressure sensor, etc., a laser sensor may be applied as necessary. Here, the laser sensor may recognize the access situation of the passenger by installing the laser light emitting unit and the light receiving unit at both ends of the landing 103. The laser sensor may be installed according to the curvature of the landing 103, wherein the laser sensor may include a plurality of light emitting parts and a light receiving part according to the landing curvature angle.

On the other hand, the infrared image detection unit is installed in a number to face the landing 103, and monitors the subject to enter or fall stepless on the rail 111. The infrared image sensing device 109 performs image signal processing using a rate of change of infrared energy distribution with respect to a subject.

As shown in FIG. 2, the infrared image sensing device 109 has an infrared camera including a Fresnel lens 201 and an infrared sensor 203, and an infrared signal detected by the infrared sensor 203 at a predetermined level. An infrared signal amplifying unit 205 for amplifying the optical signal, and a digital signal processing unit for determining the authenticity of the human body based on the infrared energy distribution ratio of the subject based on the infrared signal provided from the infrared signal amplifying unit 205 (DSP: 207). And a communication unit 209 for transmitting the result information according to the human authenticity determination to the transceiver device 115.

The Fresnel lens 201 is a filter for identifying the shape of the subject by uniformly dispersing the image of the subject. Therefore, the infrared sensor 203 preferably uses a shape detecting infrared sensor.

The digital signal processor 207 performs digital signal processing through sampling and quantization of an image signal. To this end, the digital signal processing unit 207 may include a digital filter circuit for removing noise of an input infrared signal, a digital filter circuit for extracting linear phase characteristics, and a signal conversion circuit for performing frequency analysis corresponding to satellite characteristics of the digital signal. Include. As the digital filter circuit, a Finite Impulse Response (FIR) filter or an Infinite Impulse Response (IIR) filter is used, and the signal conversion circuit may be applied with a Discrete Fourier Transform or a Fast Fourier Transform. .

In addition, the digital signal processing unit 207 is connected to each ID setting unit 211 to give each unique ID to the plurality of infrared image sensing devices 109. The ID setting unit 211 may be programmed inside the digital signal processing unit 207, and ID setting using a dip (DIP) switch may be performed if necessary. The ID information set as described above is applied to the infrared image detection device 109 and the safety line detection device 107, and is transmitted to the transmission / reception device 115 together with the safety line detection signal and the human body detection signal.

The communication unit 209 is for performing wired or wireless communication with the transceiver 115, and TCP / IP, RS-485 multi-drop method may be used, or RF multi-drop method may be used as necessary. Therefore, it will be obvious that the signal transmission means 113 also has the above-described wired or wireless method.

On the other hand, the safety line detection device 107 is a frequency generator 301 for supplying an induction frequency of a predetermined band to the safety line detection line 105, as shown in Figure 3, guided by the safety line detection line 105 An impedance measuring unit 303 for measuring an impedance with respect to a frequency to be used, a signal amplifier 305 for amplifying the output signal of the impedance measuring unit 303 to a predetermined level, and the signal amplifier 305 The controller 307 for determining whether the change in the impedance sensitivity provided by the control unit reaches a reference value and generating a safety line detection signal according to the determination result, the impedance sensitivity information corresponding to the reference value, and the unique number of the safety line detection device 107. The safety line detection signal including the memory 309 storing reference value information corresponding to the information and the unique number information of the safety line detection device 107. It consists of a communication unit 311 for transmitting in accordance with.

Hereinafter, the operation of the present invention will be described.

First, according to the initialization of the system, the frequency generator 301 of the safety line detecting device 107 supplies an excitation frequency signal to the safety line detecting line 105. The safety line detection line 105 generates an electric field in accordance with the induced frequency signal, the interaction between the body of the passenger and the electric field to the safety line detection line 105 occurs. Therefore, the impedance measuring unit 303 measures the electric field change of the safety line detection line 105.

The impedance measuring unit 303 supplies the measured electric field signal to the signal amplifier 305. The signal amplifier 305 amplifies the electric field signal to a predetermined value level and provides the signal to the controller 307. The controller 307 measures the impedance sensitivity corresponding to the change in the electric field signal. The measurement result is compared with the impedance sensitivity information previously stored in the memory 309 to determine whether the amount of change in the impedance sensitivity currently detected exceeds a reference value. As a result of the determination, when the change in the impedance sensitivity exceeds a reference value, the controller 307 recognizes that the passenger has approached the danger area of the landing 103. Of course, when the safety line detection device 107 is composed of a laser sensor, it is possible to determine whether or not the object entering the safety line through the laser receiver. Here, the object is indistinguishable from the human body, but has the advantage of increasing the installation efficiency of the system.

On the other hand, when a passenger approaches the danger zone, the control unit 307 generates a safety line detection signal and transmits it to the communication unit 311. The communication unit 311 converts the unique number information previously stored in the memory 309 and the safety line detection signal into a formatted code, and provides the converted code to the transceiver 115. At this time, the communication unit 311 uses a wired or wireless based on the signal transmission means 113. That is, the communication unit 311 and the transceiver 115 use the TCP / IP protocol or RS-485 multi-drop method. Or, if you want to use the radio, the communication unit 311 and the transmission and reception device 115 may use the RF multi-drop method.

The infrared image sensing device 109 monitors an object falling onto the railroad 111 or an object falling onto the railroad 111. Here, the infrared image sensing device 109 determines whether the subject is a living or an object by measuring infrared rays emitted from the living being. To determine this, the light source for the subject is introduced into the infrared sensor 203 through the Fresnel lens 201. The Fresnel lens 201 enlarges the shape of the subject in a predetermined direction so that the shape of the subject can be easily recognized.

In addition, the infrared rays applied through the Fresnel lens 201 are provided to the infrared signal amplifier 205 via the infrared sensor 203. The infrared signal amplifier 205 amplifies the signal magnitude of the infrared sensor 203 to an arbitrary reference value. Thereafter, the infrared signal amplifier 205 applies the amplified infrared signal to the digital signal processor 207.

The digital signal processor 207 calculates an energy distribution change rate of infrared rays. To this end, filtering to remove noise of the infrared signal is performed, and the human body's authenticity is determined by using spectrum analysis or correlation analysis based on the filtered signal. That is, the digital signal processor 207 uses a Finite Impulse Response (FIR) filter or an Infinite Impulse Response (IIR) filter to perform digital filtering.

The digital signal processor 207 performs signal analysis on the infrared signal provided through digital filtering such as FIR and IIR. It distinguishes the shape of the subject through frequency analysis of the infrared signal. Here, the signal analysis may be applied to a Discrete Fourier Transform, or a Fast Fourier Transform. Accordingly, the digital signal processor 207 detects features of the human body according to a Fourier transform algorithm.

In this way, the digital signal processing unit 207 determines the object that has fallen or stepped onto the railroad 111 by comparing the shape of the subject with the shape of the human body. As a result of the determination, a human body detection signal is generated, and unique number information set by the ID setting unit 211 is generated. The digital signal processor 207 provides the human body detection signal and the unique number information corresponding to the detection result of the subject to the communication unit 209. The communication unit 209 transmits to the transceiver device 115 through wireless or wired communication.

As described above, the transceiver 115 receives a safety line detection signal from the safety line detection device 107, and also receives a human body detection signal from the infrared image detection device 109. The transmission / reception device 115 mounts the safety wire detection signal and the human body detection signal together with each unique number information to the wired / wireless network 117. The wired / wireless network 117 is capable of networking with the transceiver 115 using RS-485 communication, and communication using a LAN may be performed as necessary.

Accordingly, the management server 119 connected to the wired / wireless network 117 collects a human body detection signal and a safety line detection signal received for each region. The management server 119 extracts a corresponding area based on the unique number information provided from the safety line detecting device 107 and the infrared image detecting device 109. The management server 119 is a database of the human body detection signal and safety line detection signal for each region.

In addition, the management server 119 performs alarm control in response to the above-described human body detection signal and safety line detection signal. That is, when the safety line detection signal provided from the safety line detection device 107 indicates that the passenger enters the dangerous area of the landing 103, the management server 119 generates an approach alarm signal. The approach alarm signal is provided to the MC (Master Clock) 121. The MC device 121 notifies the dangerous situation of the mobile terminal 123 working within the history, that is, the portable radio of the worker using a wireless system. If necessary, the management server 119 activates the broadcast system 127 for broadcasting in the platform to provide a preset comment.

On the other hand, the management server 119 transmits the fall alarm signal to the MC device 121 in response to the human body detection signal provided from the wired or wireless network 117. The MC device 121 activates the field view of the field worker, notifies the mobile terminal 123 of a dangerous situation, and executes a guide broadcast using the broadcasting system 127. At the same time, the MC device 121 issues an emergency stop command to the train entering the railroad 111 using the signal device 125.

The signal device 125 is interlocked with an automatic train control device (ATC), that is, an automatic train control device. The ATC controls the speed for the entry train using the ATC RF Antenna. If necessary, the signal device 125 may be interlocked with an automatic train stop device (ATS), that is, an automatic train stop device, to perform brake control for suppressing train entry. As a result, in the present invention, it is possible to determine the authenticity of the human body for an object entering or falling on the railroad track 111 and executing the announcement and the train control in real time according to the determination result.

As described above, the platform accident detection and notification system according to the present invention detects violations of the safety line compliance of passengers or workers, falls and track occupancy around the tracks, and the fact that the management server as an alarm signal, that is, higher As it transmits to the central control center, it provides safety warning broadcasting according to the danger situation of passengers or workers, generates ATC stop code or ATS code, provides emergency stop command and warning guidance to the driver of the train, Announcement broadcasting and train operation control is possible.

In addition, according to the present invention, since the human authenticity of the subject detected by the infrared image sensing apparatus is determined, the operation control or guidance broadcasting of the train is applied only when necessary, thereby increasing the completeness of the system.

In addition, according to the present invention, as the subject is read based on the infrared image detection, the system unit price can be reduced to activate the dissemination of the safety system.

What has been described above is merely an embodiment of the present invention, and is not limited to the embodiment of the present invention, and as claimed in the following claims, without departing from the gist of the present invention, ordinary knowledge in the field to which the present invention belongs. Anyone having the technical spirit of the present invention to the extent that various changes can be made.

Claims (6)

In the system for alerting the dangerous situation in the platform of the track train, A safety line detection device for detecting a dangerous approach state of a passenger entering the platform and notifying a safety line detection signal thereof; At least one infrared image sensing device for extracting an infrared image signal of a subject that has entered or fallen without permission on a railroad line, and determining an authenticity of the human body with respect to the infrared image signal and notifying a human body detection signal thereof; A transceiver for receiving the safety line detection signal and the human body detection signal based on a predetermined signal transmission means and for mounting the safety line detection signal and the human body detection signal to a wired or wireless network according to a predetermined protocol; A management server connected to the wired / wireless network, collecting and managing information received from the transceiver, generating an access alarm signal corresponding to the safety line detection signal, and generating a fall alarm signal corresponding to the human body detection signal; And In response to the approach alarm signal, a broadcast system for guiding broadcasting into a platform is provided, a warning message is provided to a mobile terminal provided to an on-site worker, and a dangerous situation is transmitted to the broadcast system and the mobile terminal in response to the fall alarm signal. Automatic alarm and notification system of the accident situation, characterized in that consisting of a MC (Master Clock) for providing a notification, and providing an alarm message to the incoming train using the signal device. According to claim 1, The safety line detection device, Automatic stop detection and notification of the platform accident characterized in that the safety line detection line provided on the safety line of the platform and the line detection signal detected in the safety pre-detection detection line, and the safety line detection device for transmitting it to the transmission and reception device system. According to claim 2, The safety line detection device, A frequency generator for supplying an induced frequency of a predetermined band to the safety line detection line; An impedance measuring unit for measuring an impedance of a frequency induced in the safety line detecting line; A signal amplifier for amplifying the output signal of the impedance measuring unit to a predetermined level; A controller for determining whether a change in impedance sensitivity provided by the signal amplifier reaches a reference value and generating a safety line detection signal according to a determination result; A memory for storing reference value information corresponding to the impedance sensitivity information corresponding to the reference value and the unique number information of the safety line detection device; And A platform accident detection and notification system comprising a communication unit for transmitting the safety line detection signal according to a predetermined protocol including the unique number information of the safety line detection device. The method of claim 1, wherein the infrared image detection unit, An infrared camera comprising a Fresnel lens and an infrared sensor; An infrared signal amplifier for amplifying the infrared signal detected by the infrared sensor to a predetermined level; A digital signal processor (DSP) for determining an authenticity of a human body based on an infrared energy distribution ratio of a subject based on an infrared signal provided by the infrared signal amplifier; And Platform accident detection and notification system, characterized in that the communication unit for transmitting the result information according to the human authenticity determination to the transceiver device. The method of claim 4, wherein the digital signal processing unit, A digital filter circuit for removing noise on the infrared signal and extracting linear phase characteristics and a signal conversion circuit for performing frequency analysis corresponding to the satellite characteristics of the digital signal, the digital filter circuit includes a finite impulse response ), Or an Infinite Impulse Response (IIR) filter is used, and the signal transformation circuit is a platform accident detection and notification system characterized in that the Discrete Fourier Transform or Fast Fourier Transform is applied . The communication unit according to claim 3 or 4, Platform communication automatic detection and notification system characterized in that the communication method of the transceiver and TCP / IP, RS-485 Multi-drop is applied, or RF Multi-drop communication method is applied.

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