KR101461520B1 - System for sensing invasion of security fence using power line communication - Google Patents

Abstract

The present invention relates to a system for detecting trespassing through a security fence, more particularly, to a system for detecting trespassing through a security fence which does not require installation of a separate power supply or a data cable by using using power line communication, allows installation of input/output module on a line which a user wants to use, thereby enabling interconnection with other sensors and installation of remote control device. A system for detecting trespassing of a security fence using power line communication according to the present invention includes: detection sensors which are horizontally separated apart in arbitrary locations of the fence; a signal analyzer which is connected to the detection sensors, receive detection signals of the detection sensors, and transmits the received detection signals to a central control server; and the central control server which receives trespassing detection signals from the signal analyzer. Data switch units are included in the signal analyzer and the detection sensors to make two-wire type serial power line communication, through which power is supplied or data is transmitted and received, possible.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a fence intrusion detection system using a power line communication,

The present invention relates to a fence intrusion detection system, and more particularly, it relates to a fence intrusion detection system, in which a power supply and a data cable are not required to be installed by using a power line communication and an input / output module is installed in a desired line, To a fence intrusion detection system.

In general, a fence or fence is installed to prevent unauthorized personnel from entering a facility located within the area of a particular area.

In particular, systems that can detect fence intrusion are built in major national institutions, major industrial facilities, protected facilities, correctional institutions and military garrisons.

These fence detection systems are mainly used to detect fence damage and intruder fence vibration detection systems.

Such a fence vibration detection system is disclosed in Korean Patent Registration No. 10-1287079 entitled " Fence Monitoring System Using 3D-Sensor of Face Attachable Hierarchical Structure " and 'Security Fence Intrusion Detection System and Intrusion Detection Method' of Korean Registered Patent No. 10-1046635 Lt; / RTI >

The monitoring system disclosed in Korean Patent Publication No. 10-1287079 includes a master sensor; And a plurality of slave sensors connected to the master sensor. An input / output cable connected to the control center is connected to the master sensor. A cable connected to the master sensor is connected to the slave sensor (3D sensor) Is inputted to the master sensor (3D sensor) and then outputted to the control center.

The sensing module of the sensing system disclosed in Korean Patent Registration No. 10-1046635 is attached to a security fence to analyze the sensing signal through a six-way motion sensor that detects intrusion to determine whether it is intrusion, analyze motion information from the transmitted sensing information And compares the motion information of each detection module to determine whether or not the intrusion is detected and the intrusion type.

Korean Patent Registration No. 10-1287079 and Korean Registered Patent Application No. 10-1046635 use a 3D sensor and a 6-way motion sensor in order to analyze the erroneous information according to the fence intrusion detection and to detect only the intrusion.

However, the above two prior art technologies require a power line and a communication line to be separately constructed for sensing through a 3D sensor and a six-way motion sensor. Therefore, Problems can not be solved because the maintenance can not be performed promptly.

In addition to the sensors, other types of sensors, such as infrared sensors, door sensors and warning lights, require additional control devices and additional communication and power cable installation.

Korean Patent Publication No. 10-1287079 Korean Patent Publication No. 10-1046635

A problem to be solved by the present invention is to provide a fence intrusion detection system using PLC power line communication so that a power line and a communication line can be commonly used as a two-strand detector line.

In addition, we intend to provide a fence intrusion detection system using PLC power line communication that can install additional sensors (infrared detection, door detection, warning light) without installing additional devices and cables.

According to another aspect of the present invention, there is provided a fence intrusion detection system using power line communication, comprising: sensing sensors horizontally spaced apart from a fence; A signal analyzer connected to the detection sensors for receiving the detection signals of the detection sensors and transmitting the received detection signals to the control server; And a control server for receiving an intrusion detection signal of the signal analyzer, wherein each of the signal analyzer and the detection sensors is provided with a data exchange unit capable of communicating with a power line via a power line, .

An input / output module may be connected between the sensing sensors, and the input / output module may be connected to at least one of an infrared ray sensor, a door opening / closing sensor, a warning light or a motor control device.

Here, each of the detection sensors is wired in series in a two-wire manner so that the output line of the adjacent sensor is an input line and the output line is an input line of another adjacent sensor. Based on the signal analyzer, May be adopted.

An input / output module is connected between the sensing sensors, an input line of the input / output module is an output line of the adjacent sensing sensor, and an output line of the input / output module is wired so as to be an input line of another adjacent sensing sensor .

The signal analyzer includes a signal receiver for receiving a sensing signal of the sensing sensors, a vibration level comparator for calculating a difference between a vibration level value of the sensing signal and a vibration level value of the adjacent sensing sensor, And a signal detector for transmitting a signal from the vibration level comparator to the control server.

According to the above-described configuration of the present invention, it is possible to use a power line and a communication line as a two-stranded detector line, and to perform additional PLC installation without additional devices and cables, such as infrared detection, door detection, It is possible to provide a fence intrusion detection system using power line communication.

1 is an overall configuration diagram of a fence intrusion detection system using power line communication according to the present invention.
FIG. 2 is a connection diagram of a signal analyzer and a detection sensor of a fence intrusion detection system using power line communication according to the present invention.
3 is a block diagram illustrating signal transmission of a fence intrusion detection system using power line communication according to the present invention.
4 is a configuration diagram of a PLC modem chip of a fence intrusion detection system using power line communication according to the present invention.
FIG. 5 is an example of a fence intrusion detection system using power line communication according to the present invention.
6 is another example of the implementation of a fence intrusion detection system using power line communication according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a structure and operation and effect of a fence intrusion detection system using power line communication according to the present invention will be described with reference to the accompanying drawings.

1 is an overall configuration diagram of a fence intrusion detection system using power line communication according to the present invention.

1, the fence intrusion detection system according to the present invention includes a fence 100 surrounding a facility to be protected. The fence 100 is attached to the fence 100 and detects an intrusion signal by a vibration level signal Detection sensors 101 are attached.

The detection sensors 101 are connected by a signal line and a power line, and are connected to the signal analyzer 103 by group.

The signal analyzer 103 communicates with the control server 106 via RS-232, RS485, optical link, or Ethernet communication via a data converter (not shown), a ring LAN, or a switch .

A door sensor 104 may be installed on the door side of the fence 100 and an input and output module 102 capable of receiving other detectors may be additionally provided at a predetermined location, A rotating type camera 107 capable of photographing the location of the intruder can be installed.

In addition, an alarm light 108 may be provided to notify the on-site alarm in response to the detection signal of the detection sensors 101. The alarm light 108 may be interlocked with the infrared light detection 109, 109 are connected to each other through the input / output module 102.

The sensing sensors 101 are sensing sensors having independent microprocessors with built-in piezoelectric elements. The sensing sensors 101 can be installed in units of 1 to 5 meters, adopting a digital transmission method, and easily damaged by a reinforced plastic cover And is designed to meet the environmental protection rating IP65.

The signal analyzer 103 is capable of controlling at least 56 to 246 detection sensors and is capable of controlling up to 8 input / output modules.

The signal analyzer 103 may be installed at least one to control the detection sensors in units of groups according to the number of the installed detection sensors 101.

FIG. 2 is a block diagram of a signal analyzer and a detection sensor of a fence intrusion detection system using power line communication according to the present invention, and FIG. 3 is a signal transmission block diagram of a fence intrusion detection system according to the present invention.

As shown in FIGS. 2 and 3, the signal analyzer 103 is connected in series with the plurality of detection sensors 101.

Each of the plurality of detection sensors 101-1, 101-2 ... 101-n, 101-n + 1 ... 101-n + x has an input line and an output line, And a plurality of detection sensors can be simultaneously controlled by one signal analyzer 103 as lines.

The signal transmission system of the fence intrusion detection system according to the present invention is as follows.

First, each of the detection sensors 101 installed on the fence 100 senses the vibration level transmitted from the fence 100 at each position. The first to n-th detection sensors 101-1, 101-2,..., 101-n are sequentially horizontally spaced apart from each other by a predetermined distance.

The signal analyzer 103 receives the detection signals received from the first to nth detection sensors 101-1 to 101-n and outputs the detection signals to the signal analyzer 301 of the signal analyzer 103, N-th detection sensors 101-1, 101-2,..., 101-n, respectively.

At this time, the data exchange units 305-1, 305-2, ..., 305-n, and 304 are built in the detection sensors 101 and the signal analyzer 103 to implement power line communication, It is not necessary to construct the system.

In the case of AC power line communication, the power line communication is exposed to the external environment of the fence, so there is a risk of disconnection or short circuit. Therefore, it is implemented as a 2-wire serial configuration by DC power line communication.

DC power line communication employs a method of using a high level and a low level, one being used for power supply and the other being used for exchange with a detection signal. Such data exchange is performed by a data exchange unit 305-1, 305-2, ..., 305-n, and 304, respectively.

In order to use DC power line communication, the current consumption of sensing sensors must be used very little. In case of no sensing operation, if the microprocessor of each sensor is operated in SLEEP mode to reduce current consumption, It adopts the way it is done.

DC power line communication transmits a data signal modulated at a higher frequency than a power source to a power line through a power line, and modulates a data signal having a voltage lower than power in a power line communication to a power line and transmits the data signal.

When power is supplied to the power line, power is supplied to each of the detection sensors 102 through the signal analyzer 103, and the level of power supplied to the power line is varied according to the transmission data value.

In the present invention, in order to transmit serial data to the DC power source, the voltage value of the DC power source is controlled to be two (high level voltage and low level voltage).

In the digital serial data communication, the voltage Vh is normally transmitted while maintaining the high level value, and the voltage Vl is transmitted when transmitting the low level value.

When a low level value is to be transmitted, the voltage supplied to the power line is lowered from Vh to Vl. Power is supplied at the high level, and detection signals of the detection sensors are received at the low level.

Since the plurality of detection sensors 101 are connected in series and multiple connections to the signal analyzer 103, generally each of the detection sensors 101 is given the ID of the cooperative fluid and the signal analyzer 103 detects the presence or absence of each of the detection sensors 101 ) Transmits a data packet using a unique ID or receives a detection signal inversely.

When data is received from the detection sensors 101, the power line voltage is maintained at Vh and Vl according to the data value of the detection sensors 101. Vh is required to maintain a normal voltage, A circuit for lowering the voltage of Vh to Vl is implemented.

The 2-wire serial power line communication scheme can be a serial topology connection, a tree topology connection, or a ring topology connection. When constructing a network with a connection of a serial structure or a tree structure, there is a possibility that communication may not be performed in a certain area when a failure occurs in the middle of the control target device. However, when a ring structure connection network is configured, Even if a short-circuit fault occurs in the communication network, the communication can be performed in both directions due to the failure, so there is no fear of communication in a certain area and does not affect the entire communication.

FIG. 2 illustrates an example in which the fence detection network system of the present invention is configured as a ring system connection system in consideration of this point.

The received detection signal is firstly compared with the reference level by the vibration level comparator 302. If the received vibration level is greater than the reference level, the difference between the received sensing signal and the vibration level of the adjacent sensing signal is calculated, And the vibration level of the adjacent sensing signal even when the vibration level of the adjacent sensing signal is smaller than the reference level.

Generally, when the vibration level received from the measured sensor is larger than the reference level, it is regarded as an intrusion, and an alarm, an alarm sound and a camera operation are performed. In the present invention, in order to minimize the detection error, the operation of the next step is added.

If the vibration level is greater than (or smaller than) the reference level, judgment is made as to whether or not the data is intruded, and the difference between the vibration level of the measurement detection sensor and the vibration level of the adjacent detection sensors on the right and left sides is calculated, It is judged whether or not it is intruded according to whether the value is larger than the level.

The reason for this is that when the intruder is present, the vibration level of the detection sensor at the location of the intruder is high and the vibration level of the detection sensor at the intruder-free fence is small.

However, in a coastal area or a region influenced by a typhoon, vibration is transmitted to the fence depending on the strength of the wind. When the vibration increases, the vibration level of the detection sensors located in each of them increases. An error may occur.

In the case of wind, only the vibration level of the detection sensor at one point does not rise, and the vibration level of the adjacent detection sensor also has to be increased.

Therefore, it is also possible to considerably reduce the detection error by considering the vibration level of the adjacent detection sensor in addition to the detection sensor of one position.

The vibration level comparator 302 calculates the difference between the vibration level of the received sensing signal and the vibration level of the adjacent sensing sensors on both sides when the vibration level of the received sensing signal is greater than or smaller than the reference level.

When the calculated vibration level difference is compared with the reference level and the value is larger than the reference level, the detection signal is regarded as an intruder occurrence, and the signal detection unit 303 transmits the signal to the control server 106, If it is smaller than the reference level, it is determined that the intrusion detection signal is not the intrusion detection signal, and the signal detection unit 303 does not transmit the signal to the control server 106.

That is, if the signal generated from the detection sensors 101 is larger than the reference level, it is not determined that the intrusion is unconditionally detected, and if it is smaller than the reference level, it is determined that the intrusion is not unconditionally minimized.

4 is an example of an implementation of a fence intrusion detection system using power line communication according to the present invention.

As shown in FIG. 4, the fence intrusion detection system of the present invention includes a fence 100 and a plurality of detection sensors 101 installed horizontally on a surface of the fence 100.

The plurality of detection sensors 101 installed on the fence 100 are connected to one signal analyzer 103 by a PLC power line for each group.

In addition, the input / output module 102 may be installed in the middle of the plurality of detection sensors 101 without being restricted by the position.

The input / output module 102 connects the output line of the adjacent detection sensor 101 to the input line of the adjacent detection sensor 101 with the output line as the input line.

The input / output module 102 is connected to other sensors so that signals of other sensors can be controlled by the same signal analyzer 103. The I / O module 102 is connected to a beacon 108 so that the beacon can be activated through the signal analyzer 103 which is networked with the control server 106 when an intruder is generated.

The input / output module 102 is connected to the infrared ray sensor 109 to detect an object, a human being, or an animal, which is proximate to the infrared ray sensor 109, and transmits the signal to the signal analyzer 103 May send this signal to the control server 106.

5 is another example of the implementation of a fence intrusion detection system using power line communication according to the present invention.

As shown in FIG. 5, each of the detection sensors 101-1, 101-2, ..., 101-n is controlled by one signal analyzer as an input line and an output line through two lines.

The wiring configuration of each of the detection sensors 101-1, 101-2, ..., 101-n may be connected as indicated by a dotted line, and the wiring configuration of each of the detection sensors 101-1, 101-2, The input / output modules 102-1 and 102-2 can be connected in the middle.

The input / output module 102-1 is connected to a door open / close detection sensor 503 and an infrared ray detection sensor 505 for detecting the opening and closing of the door 501 and is controlled by the signal analyzer 103 through the same line . The input / output module 102-2 is connected to a door opening / closing detection sensor 504 for sensing the opening and closing of the door 502 and a motor control device 506 for the door 502, 103, and allows the signal analyzer 103 to collect the detection signal.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, As will be understood by those skilled in the art. Therefore, it should be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than the foregoing description, It is intended that all changes and modifications derived from the equivalent concept be included within the scope of the present invention.

100: Fence
101, 101-1, 101-2, 101-3, 101-4, 101-5 ... 101-n: Detection sensor
102, 102-1, 102-2, 102-3, 102-4: input / output module
103: Signal Analyzer 104: Door Detector
105: light 106: control server
107: Rotation type camera 108:
109, 505: Infrared ray detector (detection sensor) 301: Signal receiving section
302: vibration level comparing unit 303: signal detecting unit
304, 305: Data exchange unit
501, 502: door 503, 504: door opening / closing sensor
506: Motor control device

Claims (5)

Detection sensors horizontally spaced apart at arbitrary positions of the fence;
A signal analyzer connected to the detection sensors for receiving the detection signals of the detection sensors and transmitting the received detection signals to the control server;
And a control server receiving the intrusion detection signal of the signal analyzer,
Each of the signal analyzer and the sensing sensors is provided with a data exchange unit capable of communicating with a power line via a power line,
Each of the detection sensors is wired in 2-wire type so that the output line of the adjacent sensor is an input line and the output line is an input line of another adjacent sensor,
And a network structure of a ring structure is adopted as the detection sensors based on the signal analyzer. The method according to claim 1,
An input / output module is connected between the sensing sensors,
Wherein the input / output module is connected to at least one sensor of an infrared sensor, a door opening / closing sensor, a warning light or a motor control device. delete Detection sensors horizontally spaced apart at arbitrary positions of the fence;
A signal analyzer connected to the detection sensors for receiving the detection signals of the detection sensors and transmitting the received detection signals to the control server;
And a control server receiving the intrusion detection signal of the signal analyzer,
Each of the signal analyzer and the sensing sensors is provided with a data exchange unit capable of communicating with a power line via a power line,
An input / output module is connected between the sensing sensors,
Wherein the input line of the input / output module is an output line of the adjacent detection sensor, and the output line of the input / output module is wired as an input line of another adjacent detection sensor. Detection sensors horizontally spaced apart at arbitrary positions of the fence;
A signal analyzer connected to the detection sensors for receiving the detection signals of the detection sensors and transmitting the received detection signals to the control server;
And a control server receiving the intrusion detection signal of the signal analyzer,
Each of the signal analyzer and the sensing sensors is provided with a data exchange unit capable of communicating with a power line via a power line,
A vibration level comparator for calculating a difference between a vibration level value of the sensing signal and a vibration level value of the adjacent sensing sensor and comparing the vibration level value of the sensing signal with a reference level; And a signal detecting unit for transmitting a signal from the vibration level comparing unit to the control server to determine that the intruder is intruding.

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