JP7558795B2 - Intrusion Detection System - Google Patents

Description

The present invention relates to an intrusion detection system for detecting people or other objects entering a monitored area.

Conventional intrusion detection systems are known to use object detection sensors, such as cameras and infrared sensors, to detect objects, such as people, entering a monitored area, and to determine whether an object has entered the monitored area based on the detection results of the object detection sensors (see, for example, Patent Document 1).

JP 2019-185115 A

Conventional intrusion detection systems require object detection sensors to be attached to structures such as poles or buildings that protrude upward from the ground, making them difficult to apply in places where there are restrictions on the placement of structures that protrude upward from the ground, such as the surface of a road on which vehicles travel. Furthermore, because conventional intrusion detection systems require object detection sensors to be attached to structures such as poles or buildings that protrude upward from the ground, it is easy for intruders to find the object detection sensors, and there is a risk that measures will be taken to prevent the object detection sensors from detecting intruders.

The objective of the present invention is to provide an intrusion detection system that can detect an object entering a monitored area without visually notifying the presence of an object detection sensor.

The intrusion detection system of the present invention is an intrusion detection system that detects an object intruding into a monitored area, and includes a container having a storage space for storing a cable and an opening at the top of the storage space that is closed by a lid, an object detection sensor that is provided in the storage space and transmits a transmission wave from the storage space toward above the lid and receives a reflected wave, and detects information about the object by processing the reflected wave, and a management device having a determination unit that determines whether an object has intruded into the monitored area based on the detection result of the object detection sensor.

In addition, in the intrusion detection system according to the present invention, the object detection sensor detects at least one of the following: the moving speed of the object, the moving direction of the object approaching or moving away from the object detection sensor, the distance from the object detection sensor to the object, and the angle at which the object is positioned relative to the object detection sensor.

In addition, in the intrusion detection system according to the present invention, the object detection sensor transmits unique identification data to the management device along with information about the object.

In addition, in the intrusion detection system according to the present invention, the storage container is formed by arranging a plurality of container bodies in the extension direction of the cable, and a plurality of the object detection sensors are arranged at intervals in the extension direction of the storage space in the storage space formed by the plurality of container bodies, and the management device includes installation position information which is information regarding the installation positions of each of the plurality of object sensors, and has a position identification unit that, when the determination unit detects an object intruding into the monitoring area, identifies the position of the object intruding into the monitoring area based on the installation position information and identification information transmitted from the object detection sensor that detected the object.

The intrusion detection system according to the present invention also includes a notification unit that notifies other devices of information regarding the location of an object intruding into the monitoring area, which is identified by the location identification unit.

According to the present invention, it is possible to detect objects that intrude into a monitored area without attaching an object detection sensor to a structure that protrudes upward from the ground, making it possible to apply the invention to locations where there are restrictions on the installation of structures that protrude upward from the ground. In addition, since it is difficult for an intruder to find the object detection sensor, it is difficult to implement measures to prevent the object detection sensor from detecting the intruder, making it possible to reliably detect the intruder.

1 is a schematic diagram of a container to which an intrusion detection system according to an embodiment of the present invention is applied; FIG. 2 is a cross-sectional view of a storage container according to an embodiment. FIG. 1 is a block diagram of an intrusion detection system according to one embodiment. 1 is a plan view illustrating an intrusion detection system according to an embodiment. 11 is a flowchart of an object intrusion detection process according to an embodiment.

Figures 1 to 5 show an embodiment of the present invention. Figure 1 is a schematic diagram illustrating an intrusion detection system according to a first embodiment of the present invention, Figure 2 is a cross-sectional view of a storage container, Figure 3 is a block diagram of the intrusion detection system, Figure 4 is a plan view for explaining the intrusion detection system, and Figure 5 is a flowchart of an object intrusion detection process.

The intrusion detection system 1 of this embodiment detects an intruder M as an object entering a monitored area such as private property, and issues a warning to the administrator and the intruder M.

As shown in FIG. 1, the intrusion detection system 1 of this embodiment includes a container 10 having a storage space 10a in which a cable 2 is stored, a plurality of object detection sensors 20 provided in the storage space 10a, which transmit transmission waves upward from the storage space 10a and receive reflected waves, and process the reflected waves to detect information about an object that intrudes into a monitoring area on the ground G near the storage space 10a, and a management device 30 for managing the detection results transmitted from each of the plurality of object detection sensors 20, as shown in FIG. 3.

As shown in Figures 1 and 2, the storage container 10 is for storing the cable 2 and the object detection sensor 20.

The cable 2 is a power line 2a, such as a transmission line or distribution line, that transmits power supplied from a power plant to each demand facility, and a communication line 2b for transmitting signals transmitted and received between multiple wireless base station devices and a switching center.

The storage container 10 has a storage space 10a that houses the cable 2 and the object detection sensor 20, and the storage space 10a extends along the boundary line of the private property and is formed underground below the ground level G. The present invention is not limited to storage space 10a extending along the boundary line of the private property. Storage space 10a may be formed, for example, along a road or a railway track on which vehicles travel.

As shown in FIG. 2, the storage container 10 has an opening 10b on the top surface, and is equipped with a plurality of container bodies 11 that partition the lower and lateral sides of the storage space 10a, a plurality of lid bodies 12 for closing the openings 10b, and a plurality of spacers 13 for adjusting the height position of the lid bodies 12 relative to the container body 11.

The container body 11 is made of a resin member. The container body 11 has a bottom surface portion 11a and a pair of widthwise side portions 11b that extend upward from both sides of the bottom surface portion 11a in the width direction, and is a member that extends linearly in the front-rear direction. In other words, the container body 11 is a so-called U-shaped groove with a U-shaped cross section. The storage space 10a is formed by arranging each of the multiple container bodies 11 without gaps in the extension direction of the edge of the monitoring area and in the extension direction of the cable 2. Each of the multiple container bodies 11 is buried in the ground so that the height of the opening 10b is located near the ground G. In addition, a pair of L-shaped angles 11c are fixed to the upper end surfaces of the pair of side portions 11b of the container body 11, which extend horizontally along the upper end surfaces of the side portions 11b and extend upward from the outer ends in the width direction. The L-shaped angles 11c are made of a metal member such as stainless steel.

The lid body 12 is a plate-like member whose width and front-rear dimensions are the same as those of the container body 11. The lid body 12 is made of a resin member that is permeable to the transmission waves transmitted from the object detection sensor 20. The multiple lid bodies 12 are arranged without gaps by bridging the upper ends of the multiple arranged container bodies 11 via spacers 13. The lid body 12 is fixed to the spacer 13 by fastening members such as special screws that can be attached and detached using only special tools.

The spacer 13 is a rectangular cylindrical member made of a metal such as stainless steel. The spacer 13 is arranged along the upper end of each of the pair of side portions 11b of the container body 11 via an L-shaped angle 11c. The spacer 13 is fixed to the container body 11 by fastening it to the L-shaped angle 11c with a fastening member such as a bolt (not shown). In addition, the spacer 13 is provided with a locking portion 13a for locking the object detection sensor 20 on the inner side in the width direction when attached to the container body 11.

As shown in Figures 1 and 2, the object detection sensor 20 detects an intruder entering from the object detection direction A side of the storage container 10 on the ground G near the storage container 10.

The object detection sensor 20 detects information about the object by transmitting a transmission wave and receiving a reflected wave of the transmission wave reflected by an object, and processing the reflected wave. The information about the object is information about the relative speed, relative distance, angle, etc. of the object. From this information about the object, it is possible to obtain whether or not the object has been detected, the moving speed of the object when the object has been detected, the moving direction of the object approaching or moving away from the object detection sensor 20, the distance from the object detection sensor 20 to the object, the angle at which the object is located relative to the object detection sensor 20, etc. The object detection sensor in the present invention may detect at least one of the moving speed of the object when the object has been detected, the moving direction of the object approaching or moving away from the object detection sensor, the distance from the object detection sensor to the object, and the angle at which the object is located relative to the object detection sensor. The object detection sensor 20 is, for example, a Doppler sensor or a millimeter wave radar.

The object detection sensor 20 has a sensor board 20a equipped with a transmitting antenna for transmitting a transmission wave and a receiving antenna for receiving a reflected wave, and is locked to a locking portion 13a of a spacer 13 located on the upper side of the storage space 10a while being stored in a sensor storage box 20b that is permeable to the transmission wave. At this time, the object detection sensor 20 is stored inside the sensor storage box 20b in a position in which it transmits a transmission wave diagonally upward in the object detection direction A side, which is the direction in which the lid body 12 detects a horizontal moving object outside the storage space 10a, and receives a reflected wave from the object detection direction A side, and is disposed on the side wall side facing the side wall located on the object detection direction A side at the upper side of the storage space 10a.

The object detection sensor 20 includes a transceiver unit 21 consisting of a transmitting antenna that transmits transmitted waves and a receiving antenna that receives reflected waves, a memory unit 22 in which the unique identification data of the object detection sensor 20 is stored, a processing unit 23 that calculates information about the object based on the detection signal transmitted from the transceiver unit 21, including whether or not an object has been detected, the object's moving speed if an object has been detected, the direction in which the object is moving toward or away from the object detection sensor 20, the distance from the object detection sensor 20 to the object, and the angle at which the object is located relative to the object detection sensor 20, and a communication unit 24 for transmitting data to the management device 30.

The transmitter/receiver unit 21 transmits a transmission wave having a frequency of, for example, 24 GHz and receives the reflected wave, and transmits a detection signal related to the received reflected wave to the processing unit 23.

The memory unit 22 stores unique identification data assigned to each of the object detection sensors 20, and transmits the identification data to the processing unit 23 based on a signal from the processing unit 23 instructing the processing unit 23 to transmit the identification data.

Based on the detection signal transmitted from the transmitting/receiving unit 21, the processing unit 23 calculates information about the object, including whether or not an object has been detected, and if an object has been detected, the object's moving speed, the moving direction of the object approaching or moving away from the object detection sensor 20, the distance to the object, and the angle at which the object is located relative to the object detection sensor 20, and transmits the calculated information about the object to the communication unit 24 together with the identification data stored in the memory unit 22.

The communication unit 24 transmits the information and identification data relating to the object transmitted from the processing unit 23 to the management device 30. Here, the communication between the communication unit 24 and the management device 30 may be wired communication or wireless communication. Furthermore, the communication between the communication unit 24 and the management device 30 may be performed by disposing a repeater between the communication unit 24 and the management device 30, and the data transmitted from the communication unit 24 may be transmitted to the management device 30 via the repeater.

The management device 30 includes a data acquisition unit 31 for receiving data transmitted from each of the plurality of object detection sensors 20, a determination unit 32 for determining whether an object has entered the monitoring area and whether the object that has entered the monitoring area is moving toward or away from the object detection sensor 20, a position identification unit 33 for identifying the position of the object in the monitoring area, and a notification unit 34 for issuing a warning.

The data acquisition unit 31 acquires information about the object and identification data transmitted from each of the multiple object detection sensors 20, transmits the information about the object to the determination unit 32, and transmits the identification data to the position identification unit 33.

Based on the information about the object transmitted from each object detection sensor 20, the determination unit 32 determines whether an object has entered the monitoring area, and if an object has entered the monitoring area, whether the object is moving toward or away from the object detection sensor 20, and transmits the determination result to the notification unit 34.

The position identification unit 33 has installation position information, which is information related to the installation positions of each of the multiple object detection sensors 20, and identifies the position of an object that enters the monitoring area based on the installation position information and the identification data transmitted from the object detection sensor 20 that detected the object.

The notification unit 34 transmits warning information about an object entering the monitoring area and the object's position information in the monitoring area to a terminal device 35, which is another device such as a smartphone connected to the management device 30, and also transmits a signal notifying the warning to a warning device 36, such as a warning light or speaker, installed near the object detection sensor 20.

In the intrusion detection system 1 configured as described above, the transmission wave transmitted from the transmitter/receiver 21 of the object detection sensor 20 is not blocked by the soil on the outside of the side wall located on the horizontal object detection direction A side of the lid 12, but passes through the lid 12 and is transmitted toward the object detection direction A side outside the storage space 10a. When an intruder M as an object intrudes into the monitoring area on the ground on the horizontal object detection direction A side of the lid 12, as shown in FIG. 4, the transmission wave transmitted from the transmitter/receiver 21 of the object detection sensor 20 is reflected by the intruder M and received by the transmitter/receiver 21, and the intruder M is detected by the object detection sensor 20.

The management device 30 performs an object intrusion detection process to detect an object (intruder M) intruding into the monitoring area by receiving signals transmitted from each of the object detection sensors 20. The operation of the management device 30 at this time will be explained using the flowchart in FIG. 5.

(Step S1)
In step S1, the management device 30 acquires the detection data and the identification data transmitted from each of the plurality of object detection sensors 20, and proceeds to step S2.

(Step S2)
In step S2, the management device 30 determines whether or not an object (intruder M) has invaded the monitoring area based on the detection data received from each of the multiple object detection sensors 20. If it is determined that an object (intruder M) has invaded the monitoring area, the process proceeds to step S3, and if it is not determined that an object (intruder M) has invaded the monitoring area, the object intrusion detection process ends.

(Step S3)
If it is determined in step S2 that an object (intruder M) is intruding into the monitoring area, then in step S3 the management device 30 determines whether the movement direction of the detected object (intruder M) is a direction away from the object detection sensor 20. If it is determined that the movement direction of the detected object (intruder M) is a direction away from the object detection sensor 20, the object intrusion detection process is terminated, and if it is not determined that the movement direction of the detected object (intruder M) is a direction away from the object detection sensor 20, the process proceeds to step S4.

(Step S4)
If it is not determined in step S3 that the direction of movement of the detected object (intruder M) is away from the object detection sensor 20, in step S4, the management device 30 uses the location identification unit 33 to identify the location of the object invading the monitored area based on the installation location information and the identification data transmitted from the object detection sensor 20 that detected the object, and proceeds to step S5.

(Step S5)
In step S5, the management device 30 transmits information regarding the identified object detection sensor 20 to the terminal device 35, and issues a warning notification by sending a signal to the warning device 36 located in the vicinity of the object detection sensor 20 that detected the intruder M to output a warning to the intruder M, and then proceeds to step S6.

(Step S6)
In step S6, the management device 30 determines whether the condition for stopping the warning notification is satisfied. If it is determined that the condition for stopping the warning notification is satisfied, the process proceeds to step S7. If it is determined that the condition for stopping the warning notification is not satisfied, the process proceeds to step S5.

Here, the condition for stopping the warning notification is when at least one of the following is satisfied: when an operation to stop the warning notification is performed on the terminal device 35, when a state in which the detected object (intruder M) is moving in a direction away from the object detection sensor 20 is detected, and when the detected object (intruder M) is no longer detected by the object detection sensor 20.

(Step S7)
If it is determined in step S6 that the condition for stopping the warning notification is met, the management device 30 stops the warning notification in step S7 and ends the object intrusion detection process.

Thus, according to the intrusion detection system of this embodiment, the intrusion detection system detects an object (intruder M) intruding into a monitored area, and includes a container 10 having a storage space 10a in which a cable 2 is stored and an opening 10b provided at the top of the storage space 10a is closed by a lid 12, an object detection sensor 20 provided in the storage space 10a, which transmits a transmission wave from the storage space 10a toward above the lid 12 and receives a reflected wave, and detects information about the object by processing the reflected wave, and a management device 30 having a determination unit 32 that determines whether an object has intruded into the monitored area based on the detection result of the object detection sensor 20.

This makes it possible to detect objects that intrude into the monitored area without attaching the object detection sensor to a structure that protrudes upward from the ground, making it possible to apply this to locations where there are restrictions on the installation of structures that protrude upward from the ground. Also, since it is difficult for an intruder M to find the object detection sensor 20, it is difficult to take measures to prevent the object detection sensor 20 from detecting the intruder M, making it possible to reliably detect the intruder M.

It is also preferable that the object detection sensor 20 detects at least one of the following: the moving speed of the object, the moving direction of the object approaching and moving away from the object detection sensor 20, the distance from the object detection sensor 20 to the object, and the angle at which the object is located relative to the object detection sensor 20.

This makes it possible not only to detect the presence or absence of an object entering the monitored area, but also to detect information about various objects, making it possible to reliably detect an intruder M as the object to be detected.

It is also preferable that the object detection sensor 20 transmits unique identification data to the management device 30 together with information about the object.

This makes it possible to reliably identify the object detection sensor 20 that detected an object when the management device 30 manages the detection status of multiple object detection sensors 20.

Furthermore, it is preferable that the storage container 10 is formed by arranging a plurality of container bodies 11 in the extension direction of the cable 2, and that the storage space 10a of the storage container 10 formed by the plurality of container bodies 11 has a plurality of object detection sensors 20 arranged at intervals in the extension direction of the storage space 10a, and that the management device 30 includes installation position information which is information on the installation positions of the plurality of object detection sensors 20, and has a position identification unit 33 which, when the determination unit 32 determines that an object has entered the monitoring area, identifies the position of the object entering the monitoring area based on the installation position information and the identification data transmitted from the object detection sensor 20 that detected the object.

This makes it possible to identify the position of an object entering the monitored area based on the installation position of the object detection sensor 20 that detected the object, making it possible to quickly respond to the intruder M and efficiently monitor the monitored area.

The management device 30 also has a notification unit 34 that notifies the terminal device 35 of information regarding the position of an object entering the monitoring area identified by the position identification unit 33.

This allows the administrator of the intrusion detection system 1 to quickly grasp the location of an object intruding into the monitored area, making monitoring of the monitored area more efficient.

In the above embodiment, the storage container 10 is shown in which the storage space 10a is formed underground below the ground surface G, but the present invention is not limited to this. For example, the present invention can be applied to a storage container in which part or all of the storage space is exposed above the ground surface G.

In addition, in the above embodiment, each of the multiple object detection sensors 20 is arranged along the edge of the monitoring area, and the object detection direction A is directed toward the outside of the monitoring area in order to detect an object (intruder M) entering the monitoring area from the outside to the inside, but this is not limited to this. For example, some of the multiple object detection sensors may be installed with the object detection direction A directed toward the inside of the monitoring area to detect the movement of an object (intruder M) after entering the monitoring area.

In the above embodiment, when an object is detected, information about the object, including the object's moving speed, the object's moving direction toward or away from the object detection sensor 20, the distance to the object, and the angle at which the object is located relative to the object detection sensor 20, is calculated by the processing unit 23 of the object detection sensor 20, but this is not limited to the above. The calculation of the information about the object may be performed by the management device 30.

REFERENCE SIGNS LIST 1 intrusion detection system 2 cable 10 storage container 10a storage space 10b opening 12 lid 20 object detection sensor 21 transmission/reception unit 22 storage unit 23 processing unit 24 communication unit 30 management device 31 data acquisition unit 32 determination unit 33 position identification unit 34 notification unit 35 terminal device

Claims (5)

An intrusion detection system for detecting an object intruding into a monitoring area, comprising:
a storage container having a storage space for storing a cable, the storage container having an opening at an upper portion of the storage space that is closed by a lid;
an object detection sensor that is provided in the storage space, transmits a transmission wave from the storage space toward above the lid body, receives a reflected wave, and processes the reflected wave to detect information about an object;
a management device having a determination unit that determines whether or not an object has intruded into the monitoring area based on a detection result of the object detection sensor. The intrusion detection system according to claim 1 , wherein the object detection sensor detects at least one of a moving speed of an object, a moving direction of an object approaching or moving away from the object detection sensor, a distance from the object detection sensor to the object, and an angle at which the object is located with respect to the object detection sensor. The intrusion detection system according to claim 1 or 2, wherein the object detection sensor transmits unique identification data together with information about the object to the management device. The container is formed by arranging a plurality of container bodies in an extending direction of the cable,
a plurality of object detection sensors are disposed in the storage space of the storage container formed by the plurality of container bodies at intervals in an extension direction of the storage space;
4. The intrusion detection system of claim 3, wherein the management device includes installation location information which is information relating to the installation locations of each of the object detection sensors, and when the determination unit determines that an object has intruded into the monitoring area, the management device has a position identification unit which identifies the position of the object intruding into the monitoring area based on the installation location information and identification data transmitted from the object detection sensor that detected the object. The intrusion detection system according to claim 4 , wherein the management device further comprises a notification unit that notifies other devices of information regarding the position of an object intruding into the monitored area identified by the position identification unit.

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