JP2013077260A - Security system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a security system capable of properly detecting an intrusion into a building by distinguishing it from users leaving the building, even when a monitoring area set around the building where a person can be detected does not include an area in front of an entrance of the building.SOLUTION: A security system 1 having a monitoring area set around an entry regulation block which borders on a non-monitoring area in front of an entrance of the entry regulation block includes: detection means 21 for detecting a position of a person existing in the monitoring area; chasing means 451 for chasing a position of each person and detecting a person who has newly appeared at a boundary location between the monitoring area and the non-monitoring area as a person leaving the non-monitoring area; authority identification means 273 for determining whether each person is authorized or unauthorized; passage detection means 3 for detecting an action of passing through the entrance of the entry regulation block; and determination means 453 for determining an abnormal intrusion into the entry regulation block when not detecting a leaving person who is authorized within a prescribed delay time upon the detection of his/her action of passing therethrough.

Description

  The present invention relates to a security system for monitoring a person who has entered a monitoring area.

Conventionally, intruders such as intruders who have entered a preset monitoring area are detected using any of various sensors, and when an intruder is detected, an alarm is issued or an intrusion abnormality is monitored. Security systems that report to the center are used. In such a security system, the sensor detects an abnormality even when a user who has a legitimate authority to enter the monitoring area enters the monitoring area, so the user operates the security system every time the user enters the monitoring area. It is necessary to cancel intrusion monitoring. Such an operation is complicated for the user.
Therefore, in order to enhance the convenience of the user, even if the user has a wireless tag and the sensor detects an intruder in the monitoring area, the intruder can detect the wireless tag if the intruder is detected. A security system has been proposed that recognizes that it is an intrusion abnormality (see, for example, Patent Document 1).

JP 2005-182340 A

Generally, a security system monitors a space or boundary inside a building such as a house as a monitoring area, but a suspicious person enters the building by using the surrounding area of the building, for example, the garden of a detached house as a monitoring area. Before, it becomes possible to detect and report a suspicious person quickly.
When the home garden is used as the monitoring area, the sensor is generally installed on the wall of the home so that the home garden can be monitored as widely as possible. On the other hand, the detached house may have a shape in which the vicinity of the entrance is recessed with respect to the wall. However, since the monitoring range of the sensor is blocked by the wall of the building, in that case, the vicinity of the entrance of the house becomes a blind spot of the sensor and is not included in the monitoring area. When the above security system is operated with the garden of such a house as the monitoring area, the person entering or leaving the building enters or exits the building because it passes through the blind spot of the sensor in front of the building entrance. It is difficult to accurately determine whether a person is a suspicious person.

  Therefore, the present invention accurately distinguishes the user from entering the building by distinguishing it from the user who leaves the building even if the area in front of the building entrance is not included in the monitoring area where the person set around the building can be detected. An object is to provide a detectable security system.

  As one form of this invention, it has a monitoring area that circumscribes the non-monitoring area in front of the entrance of the entry restriction area and is set on the outer periphery of the entry restriction area. A security system for detecting intrusions is provided. The security system includes a storage means for storing the boundary position between the monitoring area and the non-monitoring area, a detection means for detecting the position of a person existing in the monitoring area, and a position is tracked for each person, and a new one is detected at the boundary position. Whether the person who has appeared is a permitted person registered in advance for each person detected by the tracking means for detecting the person who has left the non-monitoring area, the identification information acquisition means for acquiring the identification information of the person, and the detection means Authority identifying means for determining whether the person is a non-permitted person based on the identification information, passage detecting means for detecting a passing action of a person passing through or entering the restricted entry area, and a passing action And determining means for determining an intrusion abnormality with respect to the entry restricted area when a leaving person who is a permitter is not detected within a predetermined delay time after the detection.

  Further, the tracking means detects a person who disappears at the boundary position as an entering person into the non-monitoring area, and the determining means detects the entering person within a predetermined passing period before detecting the passing action, and When the entering person is a permitter, it is preferable that the passing action is permitted without being determined as an intrusion abnormality.

  Furthermore, it further has an operation means for performing an operation for permitting a passing action, and the determining means does not determine that the passing action is an intrusion abnormality when the permitting operation is performed within a delay time after the passing action is detected. It is preferable to allow.

  In the security system according to the present invention, even if the area in front of the building entrance is not included in the monitoring area where the person set around the building can be detected, the intrusion into the building is distinguished from the user who leaves the building. There is an effect that it can be accurately detected.

It is a figure which shows an example of the monitoring area set to the outer periphery of the building in which the security system which concerns on one Embodiment of this invention was installed. 1 is an overall system configuration diagram of a security system according to one embodiment of the present invention. It is a schematic block diagram of an example of the sensor terminal which can be used in the security system which concerns on one Embodiment of this invention. It is a flowchart which shows the operation | movement of a person detection process performed by the sensor process part of a sensor terminal. It is a schematic block diagram of an example of the monitoring terminal which can be used in the security system which concerns on one Embodiment of this invention. It is the schematic which shows the example of tracking data. It is a flowchart which shows the operation | movement of a person tracking process performed by the monitoring process part of a monitoring terminal. It is a flowchart which shows the operation | movement of the process at the time of the entrance event generate | occur | produced performed by the determination means. It is a flowchart which shows the operation | movement of the process at the time of the entrance determination event generate | occur | produced performed by the determination means. It is a flowchart which shows the operation | movement of the process at the time of the entrance passage event generate | occur | produced performed by the determination means.

  Hereinafter, a security system for detecting a suspicious person who has entered a monitored area and issuing an alarm, which is one embodiment of the present invention, will be described with reference to the drawings.

FIG. 1 is a diagram illustrating an example of a monitoring area set on the outer periphery of a building in which a security system 1 according to one embodiment is installed. The security system 1 has an area to be monitored, such as an entrance restriction area that does not allow entry of unspecified persons, such as the building 110, and a security that is lower than that of a building such as a garden of a house. The suspicious person's approach is monitored by dividing it into a monitoring area 100 that is allowed under. On the wall of the building 110, sensor terminals 2 that detect persons existing in the monitoring area 100 are installed. In this example, in front of the entrance 111 to the building 110, there is a recessed area 112 having a shape recessed with respect to the wall of the building 110, and the monitoring range of the sensor terminal 2 is blocked by the wall of the building 110. The recessed area 112 is a blind spot of the sensor terminal 2. That is, the indentation region 112 formed between the monitoring area 100 and the entrance 111 is a non-monitoring area that is not monitored by the sensor terminal 2.
The security system 1 determines whether a person existing in the monitoring area 100 is a permitted person or a non-permitted person, and tracks the position of the person for each person. If a permitted person who moves from the non-monitoring area 112 to the monitoring area 100 is detected within a predetermined period after the passage of the entrance 111 of the building 110 is detected, the person who has passed the entrance 111 of the building 110 is suspicious. It is determined that it is an act of leaving by the permitter, not the person who is permitted. On the other hand, if the authorized person who moves to the monitoring area is not detected within the period, the person is determined to be a suspicious person. As a result, the security system can accurately detect the intrusion into the building in distinction from the user who leaves the building even when the building entrance is not included in the monitoring area set around the building.

FIG. 2 is a diagram showing an overall system configuration of the security system 1 according to one embodiment of the present invention. As shown in FIG. 2, the security system 1 is installed around a house and has at least one sensor terminal 2 that monitors at least a part of a site that is a monitoring area, and at least installed at the entrance of the house. Connected to one entrance sensor 3 and each sensor terminal 2 through a communication line, connected to each entrance sensor 3, connected to the monitoring terminal 4 installed outdoors, and connected to the monitoring terminal 4, installed in the house The operation indicator 5 is provided.
Further, the security system 1 includes a wireless tag 6 possessed by a specific person such as a user. The wireless tag 6 can wirelessly communicate with the sensor terminal 2. When the wireless tag 6 receives the question signal from the sensor terminal 2, the wireless tag 6 returns an identification code (hereinafter referred to as a tag identification code) stored in the built-in memory.

  The sensor terminal 2 detects a person who has entered the monitoring area, detects the wireless tag 6, and notifies the monitoring terminal 4 of the detection result.

  The entrance sensor 3 is passage detection means that detects an action of a person passing through or entering a house by a person as a passing action. When the entrance sensor 3 detects the passing action, the entrance sensor 3 generates a detection signal and transmits it to the monitoring terminal 4. Since the passage of a person can be indirectly monitored by opening or closing the window or door at the entrance of the house, for example, the door is attached to the door of the entrance of the house and the reed switch is turned ON / OFF according to the opening and closing of the door. A magnet sensor that detects opening and closing can be used as the inlet sensor 3. Alternatively, an infrared sensor that is installed beside the entrance and detects the presence or absence of a person passing through the entrance based on a change in the amount of received infrared light may be used. Alternatively, a light source such as an LED that is installed at one end of the entrance and emits light toward the other end and a light receiving element installed at the other end of the entrance facing the light source, and changes in the amount of received light A laser sensor that detects the presence or absence of a person passing through the entrance may be used.

  Based on the detection result from the sensor terminal 2 or the entrance sensor 3, the monitoring terminal 4 determines whether or not the person who has entered the monitoring area is a suspicious person. If the monitoring terminal 4 determines that the person who entered the monitoring area is a suspicious person, the monitoring terminal 4 issues an abnormality report indicating that the suspicious person has been detected to the monitoring center device 7 connected via the public communication line. .

The operation display 5 has a touch panel display, and displays operation buttons for the user to input operation commands. Then, when the user presses any one of the operation buttons, a predetermined operation signal assigned to the operation button is output to the monitoring terminal 4. For example, the operation indicator 5 accepts a passing action permission operation for temporarily allowing a visitor to enter and leave, and outputs a permission operation signal assigned to the permission operation to the monitoring terminal 4. Further, the operation display 5 may selectively receive and display an image captured by the camera of any one of the sensor terminals 2 from the monitoring terminal 4 in accordance with an operation by the operation button.
In addition to the operation indicator 5, a permission operation button for performing only a passage action permission operation may be provided, and the passage action permission operation may be performed from the permission operation button.

  The wireless tag 6 stores a tag identification code assigned to each user such as a resident of a building where the security system 1 is installed, and is carried by each user. The tag identification code may be a code common to all users. When the wireless tag 6 has a built-in battery and receives an interrogation signal from the sensor terminal 2, it transmits a response signal including a tag identification code. The sensor terminal 2 identifies a user such as a resident of a building and a person other than that by a tag identification code. In the present embodiment, a person possessing the wireless tag 6 is referred to as an authorized person. On the other hand, a person who does not have the wireless tag 6 is called a non-permitted person. Note that the wireless tag 6 may be a so-called active tag that actively transmits a signal including a tag identification code to the sensor terminal 2 periodically or at a predetermined timing.

  As shown in FIG. 1, in the security system 1, a non-monitoring area 112 that becomes a blind spot of the sensor terminal 2 exists at a position in contact with the entrance 111 of the building 110. The monitoring area 100 is set so as not to be in direct contact with the entrance 111 but to be in contact with a part of the non-monitoring area 112. Hereinafter, the boundary between the monitoring area 100 and the non-monitoring area 112 is referred to as a forecast line 113. The monitoring area 100 is divided into a plurality of partial areas. For example, an entrance area 101 that is an area connecting the entrance to the monitoring area 100 corresponding to a building site (site entrance 120) and the forecast line 113, and an area other than the entrance area 101 The normal monitoring area 102 is classified into two types. And the sensor terminal 2 is each installed in the outer periphery of the building 110 so that the whole monitoring area 100 can be monitored. The entrance sensor 3 is installed at the entrance 111 of the building 110, the monitoring terminal 4 is installed on the outer periphery of the building 110, and the operation indicator 5 is installed inside the building 110. The site entrance 120 corresponds to a gate or a gate that serves as an entrance to the monitoring area 100. If there is no physical entrance restriction such as a fence at the site boundary, a normal user or a visitor enters the site. It becomes a general entrance that passes. The entrance 130 to the building 110 corresponds to, for example, a front door of the building.

  The entrance area 101 is set in an area including a passage from the site entrance 120 to the forecast line 113. Not only authorized persons but also non-permitted persons can enter the entrance area 101. That is, even if a non-permitted person is detected in the entrance area 101, it is not determined as a suspicious person by itself.

  The regular monitoring area 102 is an area where entry of persons other than the authorized person is prohibited. Therefore, when a non-permitted person enters the regular monitoring area 102, the security system 1 determines that the non-permitted person is a suspicious person in principle.

Further, the non-monitoring area on the outer periphery of the monitoring area 100 is an off-site area and is distinguished from the monitoring area 100. Furthermore, the area corresponding to the building 110 is an indoor area, and is distinguished from the monitoring area 100 and the off-site area. As a general rule, this indoor area is an area where only a permitter can enter, and a non-permitted person is determined to be a suspicious person. However, when an operation for permitting entrance, for example, an operation for allowing a passing action or an operation for canceling monitoring is performed by the operation indicator 5, even if a non-permitted person enters, it is not determined as a suspicious person.
In the example shown in FIG. 1, the monitoring area is set only in a part of the outer periphery of the building in the site, but the monitoring area may be set in the entire outer periphery of the building.

  FIG. 3 is a schematic configuration diagram of the sensor terminal 2. The sensor terminal 2 includes a sensor 21, a tag reader 22, a camera 23, a home communication unit 24, a speaker 25, a storage unit 26, and a sensor processing unit 27.

The sensor 21 is a human body detection sensor that periodically detects a person present in the monitoring area and obtains the position of the detected person. For example, a laser distance measuring sensor can be used as the sensor 21. The laser ranging sensor projects a near-infrared pulse laser having a wavelength of, for example, about 870 nm in a predetermined angular step (for example, 0.25 ° unit) in a horizontal direction over a preset scanning range (for example, 180 °). Then, the reflected light of the laser is detected. Then, the laser distance measuring sensor measures the distance to the object reflecting the laser by, for example, the Time-of-Flight method. The sensor 21 scans the entire scanning range at a constant period (for example, 200 msec), measures the distance to the point where the laser is reflected in each direction within the scanning range, and uses the pulse laser to measure the measured distance. Ranging data associated with the projected direction is notified to the sensor processing unit 27.
Note that the sensor 21 may be configured to scan the laser two-dimensionally in the horizontal and vertical directions and obtain three-dimensional data including a scanning direction and a measurement distance. As for the distance measuring method, various known methods may be employed. For example, a phase difference method, a triangulation method, or the like can be used.

The tag reader 22 is an example of a human body identification sensor that acquires information for identifying a person who has entered the monitoring area.
The tag reader 22 communicates with the wireless tag 6 at a frequency of 900 MHz band or 2.4 GHz band, for example. The tag reader 22 includes an antenna having directivity in the signal transmission direction. As an antenna of the tag reader 22, for example, an adaptive array antenna that includes a plurality of small antennas and controls the traveling direction of the composite wave by adjusting the phase of the radio wave transmitted from each antenna can be used. The tag reader 22 sends out a question signal in a predetermined angular step (for example, in units of 5 °) in the horizontal direction over a preset detection range (for example, 180 °). When the tag reader 22 receives a response signal from the wireless tag 6 that responds to the question signal, the tag reader 22 analyzes the response signal and extracts a tag identification code included in the response signal. Then, the tag reader 22 notifies the sensor processing unit 27 of tag data in which the extracted tag identification code is associated with the direction in which the question signal is transmitted. The tag reader 22 scans the entire detection range at a constant cycle (for example, 200 msec), and notifies the sensor processing unit 27 of tag data at each cycle.
The tag reader 22 may include an antenna having directivity in the signal reception direction, or may include an antenna having directivity in both the transmission and reception directions. Further, the position of the wireless tag 6 can be specified by arranging three tag readers 22 and using a three-point surveying method.

  In the present embodiment, the detection range of the tag reader 22 is substantially the same as the monitoring area included in the scanning range of the sensor 21 of the same sensor terminal 2, and the azimuth and measurement in the tag data with respect to an arbitrary position in the monitoring area. It is assumed that the tag reader 22 and the sensor 21 are installed so that the directions in the distance data are the same.

  The camera 23 captures a predetermined area in the monitoring area at a predetermined cycle (for example, 200 msec), and generates an image of the predetermined area. The camera 23 passes the generated image to the sensor processing unit 27. The predetermined area is set so that, for example, a monitoring area included in the scanning range of the sensor 21 of the same sensor terminal 2 can be photographed. For example, in the example of FIG. 1, the camera 23 included in each sensor terminal 2 has a field angle of about 180 °.

  The in-home communication unit 24 connects the sensor terminal 2 and the monitoring terminal 4 so that they can communicate with each other. For this purpose, the in-home communication unit 24 includes an interface circuit for wireless communication when the sensor terminal 2 and the monitoring terminal 4 are connected according to a predetermined wireless communication method such as specific low power wireless communication. Alternatively, the in-home communication unit 24 may include an interface circuit that terminates a communication line that connects the sensor terminal 2 and the monitoring terminal 4.

  The speaker 25 outputs the audio data received from the sensor processing unit 27 as an audio signal.

  The storage unit 26 includes, for example, a nonvolatile semiconductor memory, and stores various information and programs used in the sensor terminal 2.

The storage unit 26 is for entering the entire monitoring area, each partial area (entrance area, regular monitoring area) within the monitoring area, the entrance from outside the monitoring area to the monitoring area, that is, entering from outside the site into the site. It functions as map information storage means for storing map information indicating the position of the site entrance, the position of the boundary with the indoor area, and the position of the prediction line adjacent to the non-monitoring area.
For example, the storage unit 26 holds the information of the monitoring area 100 shown in FIG. 1 as map information represented in a two-dimensional coordinate system with the position of the lower left corner of the monitoring area 100 as the origin. In the monitoring area 100, the boundary with the area outside the site is defined by the coordinates of the outer side, and the boundary with the building and the forecast line is defined by the coordinates of the inner side. And the area | region except the area | region enclosed by the inner side used as a boundary with a building and a forecast line among the areas enclosed by the outer side is made into the range of the monitoring area 100. FIG.
Further, information representing the range of each partial area such as the entrance area 101 and the regular monitoring area 102 is defined as an area surrounded by the boundary lines of the partial areas. Further, the position of the site entrance 120 is defined as an area having a predetermined width adjacent to the site entrance 120 on the map indicating the monitoring area 100. Similarly, the position of the entrance 111 of the building has a certain width adjacent to the entrance 111. The area of the forecast line 113 is defined as a constant width area adjacent to the non-monitoring area 112.

In addition, the storage unit 26 has an installation position of the sensor terminal 2 in the monitoring area as information necessary for the sensor processing unit 27 to calculate the position of the person detected in the monitoring area from the distance measurement data by the sensor 21. , The reference direction of the scanning range of the sensor 21 (for example, the center direction of the scanning range), the reference measurement data by the sensor 21 measured in a state where there is no person in the monitoring area, and the like.
Furthermore, the storage unit 26 uses the reference direction (for example, the detection range of the tag reader 22 as information necessary for the sensor processing unit 27 to associate the person detected in the monitoring area with the tag identification code detected by the tag reader 22). , The center direction of the detection range), the tag identification code of the wireless tag 6 registered in advance by the user (hereinafter referred to as user identification code), and the like.
Further, the storage unit 26 stores the identification code of the sensor terminal 2. Then, the storage unit 26 outputs the stored information and program to the sensor processing unit 27. Alternatively, the storage unit 26 stores information received from the sensor processing unit 27.

  The sensor processing unit 27 has at least one processor and its peripheral circuits. The sensor processing unit 27 controls each unit of the sensor terminal 2. In addition, the sensor processing unit 27 transmits an image captured by the camera 23 to the monitoring terminal 4 via the home communication unit 24. In addition, when receiving audio data such as a warning message from the monitoring terminal 4, the sensor processing unit 27 transmits the audio data to the speaker 25.

  The sensor processing unit 27 detects a person in the monitoring area based on the distance measurement data for one cycle received from the sensor 21, and detects the detected person and the wireless tag 6 detected by the tag reader 22. Associate. Therefore, the sensor processing unit 27 includes a moving body detection unit 271, an identical person determination unit 272, and an authority identification unit 273 as functional modules implemented by software operating on the processor.

  The moving body detection means 271 compares the distance measurement data received from the sensor 21 with the reference measurement data stored in the storage unit 26, extracts the direction (scanning azimuth) in which the distance change is greater than a predetermined value, and extracts a predetermined value. A distance change direction group having the above continuity (for example, the size of a general person) is detected as a person who has entered the monitoring area. The moving body detection means 271 then displays the map information stored in the storage unit 26, the installation position coordinates of the sensor terminal 2, the reference direction of the scanning range of the sensor 21, and the representative distance measurement data ( For example, the position of the person in the monitoring area (that is, the position coordinates on the map information) is calculated from the scanning direction and the measurement distance at the center of the distance change direction group. Since the calculation of such a position can be performed by a simple coordinate system conversion operation, its details are omitted. In addition, the moving object detection unit 271 compares the position coordinates of each person with the range of each partial area included in the map information, and determines which partial area the position of the person is included in. In addition, when a plurality of distance change direction groups are extracted, the moving body detection unit 271 determines whether or not each distance change direction group is a person, calculates the position of the person, and determines the position of the person. Determine which partial area is included.

The same person determination means 272 determines whether or not the person detected in the current scan is the person detected in the previous scan. For example, any of various known tracking processes can be used to determine whether or not the person is detected in the previous scan. For example, if the distance between the position of the person of interest detected in the current scan and the position of any person detected one scan before is less than or equal to a predetermined distance estimated from the person's movable speed, the same person The determination unit 272 determines that the person of interest is the same person as the person detected one scan before. Further, it is confirmed that the difference between the size of the distance change direction group of the person of interest detected in the current scan and the size of the distance change direction group of any person detected before one scan is equal to or less than a predetermined value. It is good also as judgment conditions.
When it is determined that the person of interest in the current scan and any person detected one scan before are the same person, the same person determination unit 272 is assigned to the person determined to be the same person one scan before. A person identification code is assigned to the person of interest. On the other hand, when it is not determined that the person of interest in the current scan and any person detected one scan before are the same person, the same person determination unit 272 determines that the person of interest is a person who has newly entered the monitoring area, A new person identification code is assigned to the person of interest.

Based on the tag identification code received from the tag reader 22, the authority identifying unit 273 determines whether the person of interest corresponds to the wireless tag 6, that is, whether the person is a permitted person or a non-permitted person.
The authority identifying unit 273 determines whether tag data has been received from the tag reader 22 when the moving body detecting unit 271 detects a person. If the tag data is not received, it is determined that the person of interest does not correspond to the wireless tag 6. If the tag data is received, the received tag identification code is registered in the storage unit 26 in advance. It is determined whether it matches any of the identification codes. If it does not match any user identification code, it is determined that the person of interest does not correspond to the wireless tag 6, and if it matches any user identification code, further, the scanning direction of the representative distance measurement data of the person of interest, It is determined whether or not the difference in orientation in the tag data is a predetermined value (for example, 5 °) or less. When the difference between the scanning direction of the representative distance measurement data of the person of interest and the direction of the tag data is equal to or less than a predetermined value, it is determined that the person of interest corresponds to the wireless tag 6.
The authority identifying unit 273 does not determine whether the difference between the scanning direction of the representative distance measurement data of the person of interest and the direction of the tag data is equal to or less than a predetermined value, and the direction of the tag data indicates the person of interest. It may be determined whether or not the person of interest corresponds to the wireless tag 6 by determining whether or not the subject is within the range of the distance change direction group.

  When the moving body detecting unit 271 detects a person, the sensor processing unit 27 detects the person's person identification code, time information indicating the detected time, position information indicating the detected position and a partial area of the position, Tag link information indicating whether or not the person corresponds to the wireless tag 6 and a tag identification code are transmitted as sensor detection information to the monitoring terminal 4 via the in-home communication unit 24 together with the identification code of the sensor terminal 2. Note that the tag link information has tag link when the detected person corresponds to the wireless tag 6, and has no tag link when the detected person does not correspond to the wireless tag 6.

  FIG. 4 is a flowchart showing the operation of the person detection process by the sensor processing unit 27. The operation flow described below is mainly executed by the sensor processing unit 27 in cooperation with each unit of the sensor terminal 2 based on a program stored in the storage unit 26 in advance. The flowchart shown in FIG. 4 is executed at the timing when ranging data is received from the sensor 21.

  When receiving the distance measurement data from the sensor 21, the moving body detection unit 271 compares the received distance measurement data with the reference measurement data, and determines whether a person exists in the monitoring area (step S401). If no person is present in the monitoring area, the sensor processing unit 27 ends a series of steps. On the other hand, if a person is present in the monitoring area, the sensor processing unit 27 moves the process to step S402. Note that the processing in steps S402 to S412 is executed for each detected person. In step S402, the moving body detection unit 271 calculates the position of the person of interest and determines in which partial area the position of the person of interest is included (step S402).

  Next, the same person determination unit 272 determines whether or not the person of interest detected in the current scan is a person detected in the previous scan (step S403). When the person of interest is a person detected in the previous scan (Yes in step S404), the same person determination unit 272 assigns the person identification code already assigned in the previous scan to the person of interest (step S405). . On the other hand, if the person of interest is not the person detected in the previous scan (No in step S404), the same person determination unit 272 assigns a new person identification code to the person of interest (step S406).

  Next, the authority identifying unit 273 determines whether tag data has been received from the tag reader 22 (step S407). If tag data is received, the authority identifying unit 273 determines whether the tag identification code matches any of the user identification codes registered in advance in the storage unit 26 (step S408). If it matches any of the user identification codes, the authority identifying unit 273 determines whether or not the difference between the detected direction of the person of interest and the detected direction of the detected wireless tag 6 is equal to or smaller than a predetermined value (step S409). ). If the difference between the detected orientation of the person of interest and the detected orientation of the detected wireless tag 6 is equal to or smaller than a predetermined value, the authority identifying unit 273 determines that the person of interest corresponds to the wireless tag 6, that is, is an authorized person. (Step S410). On the other hand, when tag data is not received, when it does not match any user identification code, or when the difference between the scanning direction of the detected representative distance measurement data of the person and the direction in the tag data is larger than a predetermined value, The authority identifying unit 273 determines that the person of interest does not correspond to the wireless tag 6, that is, is a non-permitted person (step S411).

  Next, the sensor processing unit 27 transmits the person identification code, time information, position information, tag link information, and tag identification code together with the identification code of the sensor terminal 2 to the monitoring terminal 4 (step S412). . When the processes of steps S401 to S412 are completed for all detected persons, the sensor processing unit 27 ends the series of steps.

  FIG. 5 is a schematic configuration diagram of the monitoring terminal 4. The monitoring terminal 4 includes a home communication unit 41, a center communication unit 42, an input / output unit 43, a storage unit 44, and a monitoring processing unit 45.

The in-home communication unit 41 connects the monitoring terminal 4 and the sensor terminal 2 so that they can communicate with each other. For this purpose, the in-home communication unit 41 has, for example, an interface circuit for wireless communication when the monitoring terminal 4 and the sensor terminal 2 are connected according to a predetermined wireless communication method such as specific low power wireless communication. Alternatively, the home communication unit 41 may include an interface circuit that terminates a communication line that connects the monitoring terminal 4 and the sensor terminal 2.
The in-home communication unit 41 transmits the control signal, voice data, and the like output from the monitoring processing unit 45 to the sensor terminal 2. The in-home communication unit 41 receives a person identification code, time information, position information, tag link information, tag identification code, image signal, or the like for the person detected by the sensor terminal 2 from the sensor terminal 2, and the monitoring processing unit 45. To pass.

  The center communication unit 42 has an interface circuit for connecting the monitoring terminal 4 to a public communication line. For example, when the center communication unit 42 notifies the monitoring center device 7 that a suspicious person has been detected, the center communication unit 42 performs connection processing between the monitoring terminal 4 and the monitoring center device 7 according to the control of the monitoring processing unit 45. Then, after the connection is established between the monitoring terminal 4 and the monitoring center device 7, the center communication unit 42 receives the security system 1 or the identification code of the building where the security system 1 is installed received from the monitoring processing unit 45, and the suspicious An abnormality notification signal indicating that the person has been detected is transmitted to the monitoring center device 7 via the public communication line. The center communication unit 42 may also transmit an image captured by the sensor terminal 2 to the monitoring center device 7 via a public communication line. The center communication unit 42 performs processing for releasing the connection between the monitoring terminal 4 and the monitoring center device 7 when the notification of various information as described above is completed.

  The input / output unit 43 is an input / output interface for communicating with the inlet sensor 3, and includes a connection terminal for connecting to each inlet sensor 3, a communication circuit, and a control program thereof. And it communicates according to the predetermined | prescribed communication protocol defined between each inlet sensor 3. FIG. The input / output unit 43 receives a detection signal from the entrance sensor 3 and passes it to the monitoring processing unit 45 when the entrance sensor 3 detects a passing action.

The storage unit 44 includes, for example, a nonvolatile semiconductor memory, and stores various information and programs used in the monitoring terminal 4. Similar to the storage unit 26 of the sensor terminal 2, the storage unit 44 functions as a map information storage unit and stores the map information of the monitoring area.
Further, the storage unit 44 stores an identification code of each sensor terminal 2 connected to the monitoring terminal 4, an identification code of each entrance sensor 3, coordinates representing the installation position of each sensor terminal 2 in the monitoring area, and the like.
Further, when there is a detected person in the monitoring area, the storage unit 44 stores tracking data set for the person. Details of the tracking data will be described later.
Further, the storage unit 44 may store an image received from each sensor terminal 2. The storage unit 44 then outputs the stored information and program to the monitoring processing unit 45. Alternatively, the storage unit 44 stores information received from the monitoring processing unit 45.

  The monitoring processing unit 45 includes at least one processor and its peripheral circuits. The monitoring processor 45 has a timer circuit. Then, the monitoring processing unit 45 controls each unit of the monitoring terminal 4. The monitoring processing unit 45 determines whether or not the person in the monitoring area is a suspicious person based on the information received from each sensor terminal 2 and the detection signal received from each entrance sensor 3, and performs various warning processes. Execute. For this purpose, the monitoring processing unit 45 includes a position tracking unit 451, an event detection unit 452, and a determination unit 453 as functional modules implemented by software operating on the processor.

When the position tracking unit 451 receives information about a person existing in the monitoring area from the sensor terminal 2 via the in-home communication unit 41, the tracking unit 451 records tracking data for the person in the storage unit 44 and tracks the position of the person. To do.
FIG. 6 shows an example of tracking data. As shown in FIG. 6, the tracking data is managed for each person identification code 601 and includes time 602, position (area) 603, tag link information 604, tag identification code 605, permission flag 606, and event information 607. For convenience, a word indicating the content is shown in each column of FIG. 6, but a code corresponding to the word is actually stored in the storage unit 44.
When the newly received person identification code is already recorded in the tracking data, the position tracking unit 451 displays the received time information, position information, tag link information, and tag identification code as information immediately before the person identification code, respectively. Is recorded in the fields of time 602, position 603, tag link information 604, and tag identification code 605 in the next line. On the other hand, if the newly received person identification code is not yet recorded in the tracking data, the position tracking unit 451 newly adds the person identification code to the tracking data, and the received time information, position information, tag link information The tag identification code is recorded in the fields of time 602, position 603, tag link information 604, and tag identification code 605 in the first row of the added person identification code.

  The event detection unit 452 detects an event corresponding to the action of the person in the monitoring area based on the tracking data when the position tracking unit 451 updates the tracking data, when a timer described later expires, or at regular intervals. It is behavior detection means for detecting occurrence. When detecting the occurrence of an event, the event detection unit 452 records the identification code of the detected event in the event information 607 in the tracking data.

  The determination unit 453 executes processing corresponding to each event detected by the event detection unit 452, and detects a suspicious person who enters the building or the monitoring area.

  FIG. 7 is a flowchart showing an operation of processing based on the tracking data by the monitoring processing unit 45. The operation flow described below is mainly executed by the monitoring processing unit 45 in cooperation with each unit of the monitoring terminal 4 based on a program stored in the storage unit 44 in advance. The flowchart shown in FIG. 7 is executed at a timing when information about a person existing in the monitoring area is received from the sensor terminal 2 or when a detection signal is received from the entrance sensor 3.

  First, the position tracking unit 451 determines whether information about a person existing in the monitoring area is received from the sensor terminal 2 (step S701). The position tracking unit 451 determines whether or not the received person identification code is already recorded in the tracking data when the information about the person existing in the monitoring area is received from the sensor terminal 2 (step S702). . When the received person identification code is already recorded in the tracking data, the position tracking unit 451 receives the received time information and position information in each column of the line next to the line in which the information immediately before the person identification code is recorded. The tag link information and the tag identification code are recorded (step S703). On the other hand, if the received person identification code is not yet recorded in the tracking data, the position tracking unit 451 newly adds the person identification code to the tracking data and receives it in each column of the first line of the added person identification code. The recorded time information, position information, tag link information, and tag identification code are recorded (step S704).

  On the other hand, if the information about the person existing in the monitoring area has not been received from the sensor terminal 2 in step S701, or the position tracking unit 451 updates the tracking data in step S703 or step S704 to track the position of the person. If so, the event detection unit 452 determines whether each event has occurred based on the tracking data and the detection signal from the entrance sensor 3 (step S705). If the event detection unit 452 does not detect the occurrence of an event, the event detection unit 452 ends the series of steps. On the other hand, when detecting the occurrence of an event, the event detecting unit 452 records the identification code of the detected event in the event information of the tracking data (step S706). Next, the determination unit 453 executes processing corresponding to the event detected by the event detection unit 452 (step S707), and ends a series of steps.

  Hereinafter, each event will be described. The generated events include an entrance event, an exit event, a stay event, a movement event, an entrance determination event, an exit event, and an entrance passage event.

The entrance event is an event indicating that a new person has entered the monitoring area from the off-site area.
The event detection unit 452 determines that an entrance event has occurred when a new person identification code is added to the tracking data shown in FIG. 6 and the position 603 of the person at that time is near the boundary with the off-site area. .

When the entry event is detected, the determination unit 453 permits entry into the monitoring area if the person is a permitter. On the other hand, if the person is a non-permitted person and enters from other than the entrance to the site, the person is determined to be a suspicious person who has illegally entered the site regardless of the entrance area or the regular monitoring area. Also, if the person is a non-permitted person and enters from the entrance of the site, the person is not immediately determined to be a suspicious person, but the determination of whether or not the person is a suspicious person is suspended, and a specific tracking is performed in the subsequent tracking. Temporarily allow entry into the entrance area until suspicious behavior is detected. Specifically, the staying action in the entrance area by the person is permitted for a predetermined permission time T1. This permission time T1 is a time estimated that a person may perform some suspicious action (for example, picking, peeping, glass breaking), etc. in the entrance area. It is set longer than the time required for temporary work such as turning back immediately or delivering. For example, the permission time T1 is set to 30 seconds. How to set the permission time T1 is appropriately optimized according to the size of the monitoring area, the monitoring purpose, and the like.
In this way, by making the judgment criteria for judging a person entering from the site entrance as a suspicious person more strict than the judgment criteria for judging a person entering from outside the site entrance as a suspicious person, a delivery person, a visitor, etc. When a person who does not have the wireless tag 6 enters from the entrance of the site due to legitimate circumstances, it is possible to prevent the occurrence of false alarms by determining such a person as a suspicious person. On the other hand, it is possible to detect and report early suspicious persons who do not have a wireless tag that has entered from the site entrance.

FIG. 8 is a flowchart showing the operation of the process performed when the entrance event occurs, which is executed by the determination means 453.
When the occurrence of an entrance event is detected, the determination unit 453 determines whether or not the person who has newly entered the monitoring area is a permitter, depending on whether the tag link information in the tracking data is linked or not. (Step S801). If the person is a permitter, the determination unit 453 permits the person to enter the entrance area (step S802) and ends the series of steps. On the other hand, when the person is a non-permitted person, the determination unit 453 determines whether the person has entered from the entrance of the site based on whether the position of the person in the tracking data is in the vicinity of the entrance of the site (step) S803).
When the person is entering from other than the entrance to the site, the determination unit 453 determines that the person is a suspicious person, and the operation indicator 5 indicates an outer periphery intrusion abnormality indicating that the person has entered the monitoring area. In addition to notifying the user in the building, the monitoring center device 7 is notified (step S804), and the series of steps is completed. At this time, the determination unit 453 may transmit the voice data of the warning message to the sensor terminal 2 and output it from the speaker 25. In addition, since a person who is determined to be a suspicious person may further enter the building, the monitoring processing unit 45 continuously tracks the suspicious person.
On the other hand, when the person enters from the entrance of the site, the determination unit 453 suspends the determination of whether or not the person is a suspicious person, sets the permission flag of the person to ON in the tracking data, and enters the entrance area. Is temporarily permitted to enter (step S805). In this case, the determination unit 453 continuously tracks the non-permitted person who has temporarily permitted entry into the entrance area. Therefore, the determination unit 453 activates a timer for confirming whether or not the person remains in the entrance area after the permission time T1 has elapsed (step S806), and ends a series of steps. The permitted time T1 is counted for each person who enters from the entrance to the site.

  The temporary permission to enter the entrance area described above is set for each person. Therefore, even if a temporarily authorized person already exists in the entrance area, if another person enters the entrance area from other than the entrance to the site, the person is determined to be a suspicious person, and a perimeter intrusion abnormality is notified. The On the other hand, when a person who is temporarily permitted already exists in the entrance area and another person enters from the entrance of the site, a temporary permission is set for that person separately, and a permission time T1 for that person is set. A new timer is started.

The exit event is an event indicating that a person has exited from the monitoring area to the off-site area.
The event detection unit 452 is not notified of information about the person recorded in the tracking data shown in FIG. 6 from the sensor terminal 2 continuously for a certain period, and the last position 603 of the person is near the boundary with the outside of the site. If there is, it is determined that an exit event has occurred. For example, the certain period can be a period corresponding to one scan or a plurality of scans in the sensor 21 of the sensor terminal 2.

  When the occurrence of the exit event is detected, the determination unit 453 ends the tracking process for the person. That is, the determination unit 453 deletes information about the person (person identification code) from the tracking data. The information about the person may be deleted after being held for a certain period of time so that the user can confirm it. If the person is determined to be a suspicious person, the information about the person may not be deleted until the monitoring device confirms that the suspicious person has been detected and a recovery signal is input.

The stay event is an event indicating that the non-permitted person who has temporarily permitted entry into the entrance area has stayed in the entrance area for more than the permitted time T1.
The event detection unit 452 determines that a staying event has occurred for the person whose tracking data permission flag 606 shown in FIG. 6 has been counted for the person whose time is being counted for the person who has timed the permission time T1.

  When the occurrence of the stay event is detected, the determination unit 453 determines that the person is a suspicious person who has entered to perform some suspicious action. Then, the determination unit 453 notifies the monitoring center device 7 of the outer peripheral intrusion abnormality to the user in the building through the operation display 5.

The movement event is an event indicating that a person has moved from the entrance area to the regular monitoring area.
The event detection unit 452 determines that a movement event has occurred when there is a person whose position 603 has changed from a position in the entrance area to a position in the regular monitoring area in the tracking data shown in FIG.

  When the occurrence of a movement event is detected, the determination unit 453 determines whether the person is a permitted person or a non-permitted person depending on whether the tag link information 604 of the tracking data is linked or not. Then, the determination unit 453 does not particularly perform processing when the person is an authorized person. On the other hand, if the person is a non-permitted person, it is further determined whether or not the person is a non-permitted person who has temporarily permitted entry into the entrance area depending on whether or not the permission flag 606 is ON. If the person is not a non-permitted person who has temporarily permitted entry into the entrance area, the person has already been determined to be a suspicious person and has been notified of an abnormal invasion of the outer periphery, so no particular processing is performed. On the other hand, if the person is a non-permitted person who has temporarily permitted entry into the entrance area, the person is determined to be a suspicious person who has illegally entered for the purpose of empty burial or hiding. Then, the determination unit 453 notifies the monitoring center device 7 of the outer peripheral intrusion abnormality to the user in the building through the operation display 5.

The entrance determination event is an event indicating that a person has moved from a monitoring area to an indoor area (building) or a non-monitoring area adjacent to the building entrance.
The event detection unit 452 is not notified of information about the person recorded in the tracking data shown in FIG. 6 continuously from the sensor terminal 2 for a certain period, and the last position 603 of the person is near the boundary with the building, Alternatively, if it is in the vicinity of the forecast line, it is determined that an entrance determination event has occurred. For example, the certain period can be a period corresponding to one scan or a plurality of scans in the sensor 21 of the sensor terminal 2.

The determination unit 453 detects a person (entrance person) who has moved from the monitoring area to the non-monitoring area across the forecast line based on the tracking data. Then, based on the determination result of whether the person is the permitted person or the non-permitted person and the detection result of the passing action by the entrance sensor 3, it is determined whether or not the person is a suspicious person who has entered the building. When a passing action is detected within a predetermined period after detecting movement by the permitter from the monitoring area to the non-monitoring area, the passing action is regarded as being by the permitter, and the building intrusion is not abnormal. For this reason, when the occurrence of the entrance determination event is detected, the determination unit 453 determines whether the person has entered the non-monitoring area or has entered the building depending on whether the last position 603 of the person is near the forecast line. Determine if you did. Further, the determination unit 453 determines whether the person is an authorized person or a non-permitted person depending on whether the tag link information 604 of the tracking data is linked or not.
The determination unit 453 does not particularly perform processing when the permitter enters the building. On the other hand, when a non-permitted person enters the building, the person is judged to be a suspicious person who has illegally entered the building for the purpose of vacant nest, etc. Notifying a user who is occupying a room in the building via the vessel 5 and reporting to the monitoring center device 7.

  In addition, when the permitter enters the non-monitoring area, the determination unit 453 passes the detection when the detection signal of the passing action is received from the entrance sensor 3 during the predetermined permission time T2 (passing period of the present invention). The person who performed the action is a permitter who has entered the non-monitoring area and is determined not to be a suspicious person. Therefore, when the permitter enters the non-monitoring area, the determination unit 453 performs temporary permission setting for entering the building during the permission time T2. The permission time T2 is estimated to be due to the permitter moving to the non-monitoring area, and a predetermined margin is added to the time required to move from the forecast line to the building entrance and open the door. Set to time. For example, the permission time T2 is set to about 30 seconds to 3 minutes.

On the other hand, when the non-permitted person enters the non-monitoring area, the determination means 453 does not immediately determine that an abnormal entry into the building has occurred because the suspicious person has not yet entered the building. Continue. In this case, the determination unit 453 allows the person to stay in the non-monitoring area for a predetermined permission time T3 (the stay permission period of the present invention). The permission time T3 is a time for allowing a non-permitted person to stay near the entrance of the building, and is set to the same time as the permission time T2 or a time shorter than T2, for example. The permission time T3 may be longer than the permission time T2 in consideration of the time for the user to respond to the visitor.
When the determination unit 453 receives the detection signal of the passing action from the entrance sensor 3 within the permission time T3, the person who has performed the passing action at that time is a non-permitted person who has entered the non-monitoring area and is a suspicious person It is determined that Thus, in this embodiment, permission time T3 is used together also as time (2nd passage period) by which it is estimated that the passage action is by the nonpermitted person who moved to the non-monitoring area. In addition, you may set T3 as a residence permission period and T3 as a 2nd passage period separately.

In addition, the determination unit 453 detects a new person in the vicinity of the prediction line in the monitoring area without receiving the passing action detection signal from the entrance sensor 3 within the permission time T3, that is, exceeds the prediction line. If the person who moved from the non-monitoring area to the monitoring area (exited person) is detected and the person is a non-permitted person, the same person as the non-permitted person who entered the non-monitoring area Is determined. In this case, the position tracking unit 451 records information about the non-permitted person who appears in the vicinity of the forecast line as tracking data of the non-permitted person determined to be the same person, and resumes tracking of the position of the person. Therefore, when the non-permitted person stays in the entrance area exceeds the permitted time T1, the determination unit 453 determines the person as a suspicious person in the stay event. In that case, the stay time should be limited including the time the non-permitted person has stayed in the entrance area in the past. Therefore, the determination means 453 calculates the time that the non-permitted person stayed in the entrance area before moving to the non-monitoring area based on the time information of the tracking data, and stays from the permitted time T1. The time spent in the entrance area is newly counted as the new permission time. Then, when the new permission time has passed, that is, the total time of staying in the entrance area before moving to the non-monitoring area and the time staying in the entrance area after returning to the entrance area is the permission time. When T1 is exceeded, the non-permitted person is determined to be a suspicious person in the stay event, and it is determined that an abnormal entry into the monitoring area by the suspicious person has occurred.
The determination means 453 continuously measures the time from when the non-permitted person first entered the entrance area to the present time so as to limit the stay time of the non-permitted person including the non-monitoring area. The non-permitted person may be determined as a suspicious person when the time exceeds the permitted time T1. Alternatively, the time spent newly staying in the entrance area after resuming tracking may be counted again.

  In addition, the determination unit 453 does not detect a passing action or detects a non-permitted person in the vicinity of the forecast line, and if the permitted time T3 has passed, the determination unit 453 stays unfairly in the non-monitoring area. It is determined that a suspicious person has entered the monitoring area, and it is determined that an abnormality has occurred.

FIG. 9 is a flowchart showing the operation of the processing when the entrance determination event occurs, which is executed by the determination means 453.
When the entrance determination event is detected, the determination unit 453 determines whether or not the determination target person has moved from the prediction line based on whether or not the last position of the person in the tracking data is near the prediction line. (Step S901).
When the person is moving from other than the vicinity of the forecast line, that is, when the person has entered the building, the determination unit 453 determines whether the person is in accordance with whether the tag link information in the tracking data is linked or not. It is determined whether or not the person is a permitter (step S902). If the person is a permitter, the determination means 453 determines that the permitter has successfully entered the room, and ends the series of steps. On the other hand, when the person is a non-permitted person, the determination unit 453 determines that the person is a suspicious person, notifies the user in the building of the abnormal invasion of the building via the operation display 5 and monitors the person. The center device 7 is notified (step S903), and a series of steps is terminated.

Even when the person to be determined enters from the vicinity of the forecast line, the determination unit 453 determines whether or not the person is an authorized person depending on whether the tag link information in the tracking data is linked or not. (Step S904).
When the person is a permitter, the determination unit 453 temporarily sets permission to enter the building and starts a timer for measuring the permission time T2 (step S905). Next, the determination unit 453 determines whether or not a passage action detection signal has been received from the entrance sensor 3 (step S906). When the passage behavior detection signal is received from the entrance sensor 3, the determination unit 453 determines that the person who performed the passage behavior is a permitter and not a suspicious person (step S907), and ends a series of steps.
On the other hand, when the detection signal of the passing action is not received from the entrance sensor 3, the determination unit 453 has a permitter having the same wireless tag as the determination target person, that is, a tag associated with the same tag identification code. It is determined whether or not the permitted person has returned from the forecast line to the monitoring area based on whether or not a person with a link has newly appeared in the vicinity of the forecast line (step S908). When there is an authorized person who has returned from the prediction line to the monitoring area, tracking of the position of the person is resumed (step S909). On the other hand, when the permitter has not returned to the monitoring area, the determination unit 453 determines whether or not the permission time T2 has elapsed since the timer was started in step S905 (step S910), and the permission time T2 has elapsed. If not, the process returns to step S906. When the permission time T2 has elapsed since the timer was started in step S905, or when tracking of the position of the person is resumed in step S909, the determination unit 453 clears the temporary permission setting for entering the building (step S911). ), A series of steps is completed.

  When it is determined in step S904 that the determination target person is a non-permitted person, the determination unit 453 activates a timer for measuring the permission time T3 (step S912). Next, the determination means 453 determines whether or not a passage action detection signal has been received from the entrance sensor 3 (step S913). When the detection signal of the passing action is received from the entrance sensor 3, the determination unit 453 determines that the person who has performed the passing action is a suspicious person who has entered the building. Accordingly, the determination unit 453 determines that an abnormal entry into the building by a suspicious person has occurred, notifies the user who is in the building through the operation display 5 of the abnormal entry into the building, and monitors the monitoring center device 7. (Step S914), and a series of steps is completed.

On the other hand, when the passage behavior detection signal is not received from the entrance sensor 3, the determination unit 453 is located in the vicinity of the prediction line in the tracking data, and a person without a tag link is newly added to the tag link information. It is determined whether or not there is a non-permitted person who has entered the monitoring area from the forecast line (step S915). When there is a non-permitted person who has entered the monitoring area from the forecast line, the determination unit 453 regards the non-permitted person as the same person as the non-permitted person who has entered the non-monitoring area and resumes tracking the position of the person. (Step S916). In this case, the determination means 453 calculates the time that the non-permitted person stayed in the entrance area before moving to the non-monitoring area based on the time information of the tracking data, and stays from the permission time T1. The stay time in the entrance area is newly counted by setting the time obtained by reducing the time spent as a new permission time. And when new permission time passes, the non-permitted person will be determined as a suspicious person in a stay event, and it will be determined that the suspicious person has entered the monitoring area.
On the other hand, when there is no permitter entering the monitoring area from the forecast line, the determination unit 453 determines whether or not the permission time T3 has elapsed since the timer was started in step S912 (step S917). If T3 has not elapsed, the process returns to step S913. When the permission time T3 has elapsed since the timer was started in step S912, the determination unit 453 determines that the person is a suspicious person who has entered the monitoring area. Therefore, the determination means 453 determines that an abnormality in entering the monitoring area by the suspicious person has occurred, notifies the abnormality in the outer periphery intrusion to the user existing in the building via the operation display 5, and the monitoring center device 7 (step S918), and the series of steps is terminated.

The exit event is an event indicating that a person has entered the monitoring area from an indoor area (building) or a non-monitoring area adjacent to the building entrance.
The event detection unit 452 adds a new person identification code to the tracking data shown in FIG. 6, and when the position 603 of the person at that time is in the vicinity of the boundary with the indoor area, or in the vicinity of the prediction line, It is determined that an exit event has occurred. However, when the tracking of the position of the person is resumed in steps S909 and S916 of the flowchart shown in FIG. 9, it is not determined that an exit event has occurred.

  When the person who entered the monitoring area from the building or the non-monitoring area is a non-permitted person, it is assumed that the visitor is leaving or the user such as a resident of the building forgets the wireless tag 6 and comes out. Is done. Therefore, when the occurrence of the exit event is detected, the determination unit 453 permits entry into the entrance area when the person is a permitter, similarly to the case where the entrance event is detected. Is a non-permitted person, a permission flag is set for the person, and a stay in the entrance area is temporarily permitted for a permission time T1.

The entrance passage event is an event indicating that passage behavior is detected at the entrance of the building.
The event detection unit 452 determines that an entrance passage event has occurred when a detection signal of passage behavior is received from the entrance sensor 3.

When the entrance sensor 3 detects a passing action, the determination unit 453 determines whether a building intrusion abnormality has occurred. Therefore, if no passing behavior is detected within the permission time T2 after detecting movement of the permitted person to the non-monitoring area, or within the permission time T3 after detecting movement of the non-permitted person to the non-monitoring area. If no passing action is detected, the occurrence of an intrusion abnormality is determined in the entrance passing event. However, it is not possible to determine whether the person who has performed the passing action is a permitter or a non-permitted person and whether the person has entered or exited the building simply by detecting the passing action at the entrance of the building. Therefore, the determination unit 453 suspends the determination of the building intrusion abnormality until a predetermined delay time T4 elapses after the passage action is detected, and determines that the person is not a suspicious person until the delay time T4 elapses. If the condition is not satisfied, the person is determined to be a suspicious person when the delay time T4 has elapsed. If the determination unit 453 detects a permitter who has entered the monitoring area from the non-monitoring area through the forecast line before the delay time T4 has elapsed, the person who has performed the passing action is the permitting person, It is determined that it is not a suspicious person.
Further, the determination unit 453 performs the permission operation until the delay time T4 elapses after the passage action is detected, and when the permission operation signal is received from the operation indicator 5, the person who has performed the passage action is the user. It is determined that the person is not a suspicious person.

  When the delay time T4 has passed without receiving a permission operation signal or detecting a permitter entering the monitoring area from the non-monitoring area, the determination unit 453 determines that the person who has performed the passing action is a suspicious person, It is determined that an intrusion abnormality has occurred. The delay time T4 is a predetermined time for the time required for the user to move from the building entrance to the forecast line after opening the door, or for the time required for the user to perform permission operation after the visitor enters or leaves the building. Set to the time with margin added. For example, the delay time T4 is set to about 10 seconds. In addition, the determination unit 453 notifies the abnormality notice to the person and the user who took the passing action via the sensor terminal 2 and the operation display 5 during the measurement of the delay time T4.

  Note that when a permission operation signal is received from the operation display 5 within a predetermined time before the passage action is detected, the person may be determined as a visitor permitted by the user. Alternatively, when a permission operation signal is received from the operation display 5 within a predetermined time before and after the passage action is detected, the person may be determined as a visitor permitted by the user. These predetermined times can be the same as the delay time T4.

On the other hand, when a non-permitted person who has entered the monitoring area from the non-monitoring area is detected without receiving a permission operation signal from the operation indicator 5, the non-permitted person has not received a permission operation by the user. , May be a suspicious person. Therefore, in that case, the determination unit 453 continuously monitors the reception of the permission operation signal, and when the delay time T4 has elapsed without receiving the permission operation signal, the person is determined to be a suspicious person and the building intrusion abnormality To be notified.
Even when a passing action is detected, if the permission time T2 or T3 is being counted in the determination process for the admission determination event described above, priority is given to the determination at the admission determination event, and the entrance passage event It is not determined whether the building is intrusive or not. Specifically, in the flowchart of FIG. 9, when a passing action is detected while the iterative process of S905 to S910 or S912 to S917 is being performed, the process of S907 or S914 is prioritized.

FIG. 10 is a flowchart showing the operation of the processing when the entrance passage event occurs, which is executed by the determination means 453.
When the occurrence of the entrance passage event is detected, the determination unit 453 determines whether or not the permission time T2 or T3 is being counted in the entrance determination event, that is, whether or not the entry abnormality determination process is being performed in the entrance determination event. (Step S1001). If the entry determination event is in the process of determining an intrusion abnormality, the intrusion abnormality determination process is not performed in the entrance passage event, and the series of steps ends.

If the entry abnormality determination process is not performed, the determination unit 453 activates a timer for measuring the delay time T4 (step S1002). Next, the determination means 453 determines whether or not a permission operation signal has been received from the operation indicator 5 (step S1003). When the permission operation signal is received from the operation indicator 5, the determination unit 453 determines that the person who performed the passing action is a visitor permitted by the user and is not a suspicious person (step S1004), and a series of steps. Exit.
On the other hand, when the permission operation signal has not been received from the operation indicator 5, the determination unit 453 is located in the vicinity of the forecast line in the tracking data, and whether a tag link information has been newly added as a person with a tag link. Whether or not there is an authorized person who has entered the monitoring area from the non-monitoring area beyond the forecast line is determined (step S1005). If there is a permitter who has entered the monitoring area beyond the forecast line, the determination unit 453 determines that the person who has performed the passing action is a permitter and is not a suspicious person (step S1006), and ends the series of steps. To do. On the other hand, when there is no authorized person who has entered the monitoring area beyond the forecast line, the determination unit 453 determines whether or not the delay time T4 has elapsed since the timer was started in step S1002 (step S1007). If the delay time T4 has not elapsed, the process returns to step S1003. When the delay time T4 has elapsed since the timer was started in step S1002, the determination unit 453 determines that the person who has performed the passing action is a suspicious person, and the building intrusion abnormality is present in the building via the operation display 5. In addition to notifying the user in the room, the monitoring center device 7 is notified (step S1008), and the series of steps is terminated.

  Thereby, even if it is a case where the sensor terminal 2 cannot monitor in front of a building entrance, it is based on whether the person who moved from the monitoring area to the non-monitoring area is a permitter, and the timing of the passage action at a building entrance. It is possible to accurately determine whether the passing action is due to entry or exit, and whether it is due to a user or a suspicious person.

  The event generation detection process and the process corresponding to the detected event shown in steps S705 to S707 of the flowchart shown in FIG. 7 are performed when information about a person existing in the monitoring area is received from the sensor terminal 2. Or when a detection signal is received from the inlet sensor 3, and is executed at regular intervals. This is because a process corresponding to a case where a person moves from the monitoring area to the off-site area or the indoor area and cannot be detected by the sensor terminal 2 like an exit event or an entrance determination event is executed. For example, the certain period can be a period corresponding to one scan or a plurality of scans in the sensor 21 of the sensor terminal 2. Further, the above processing is executed when the timer started by the entrance event expires. This is because, when a non-permitted person who has temporarily permitted stay in the monitoring area stays beyond the permitted time, such as a staying event, the corresponding processing is surely executed.

  As described above, in the security system according to one embodiment of the present invention, the non-monitoring area is set so as to be in contact with the entrance of the entry restricted area, is not in contact with the entrance of the entry restricted area, and is not monitored. A monitoring area is set so as to be in contact with the area, and it is determined whether a person existing in the monitoring area is a permitted person or a non-permitted person, and the position of the person is tracked for each person. Then, if a permitter moving from the non-monitoring area to the monitoring area is detected within a predetermined period after the passage behavior is detected, it is determined that the permitting person has left the building, and permission to move from the monitoring area to the non-monitoring area is granted. If a passing action is detected within a predetermined period after the person is detected, it is determined that the person is allowed to enter the building. On the other hand, when the passing action is detected but the permitting person does not enter or leave, the person is determined to be a suspicious person. Thereby, even if a building entrance is not included in the monitoring area, the security system can accurately determine the intrusion of a suspicious person into the building as distinguished from the user entering or leaving the building.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to these embodiments. For example, in step S914 of the flowchart shown in FIG. 9, if a non-permitted person receives a detection signal of passing action from the entrance sensor within the permission time T3 after entering the non-monitoring area beyond the forecast line, immediately The example which determines a person as a suspicious person was shown. However, the determination unit may wait until the delay time T4 elapses and determine that the person is a suspicious person when the permission operation is not performed by the user. In that case, for example, the determination unit omits step S914, and proceeds to step S1002 to start the timer of the delay time T4 even during the measurement of the permission time T3 in step S1001 of FIG. In step S1008), the person is determined to be a suspicious person.

  In the security system, the regular monitoring area may not be set in the monitoring area. In that case, the entire range of the monitoring area becomes the entrance area.

In addition, the sensor terminal determines the person's face in the image taken by the camera of the sensor terminal as a pre-registered user's face in order to determine whether the person in the monitoring area is a permitted person or a non-permitted person. You may collate. In this case, when the sensor terminal determines that the face of the person shown in the photographed image matches the face of any one of the users registered in advance, the person becomes the authorized person. On the other hand, if the sensor terminal determines that the face of the person shown in the photographed image does not match the face of any user registered in advance, the person is regarded as a non-permitted person. In this modification, in order to perform face matching, for example, any of various known face matching processes can be employed. In this case, the sensor terminal may not have a tag reader.
In addition, the sensor terminal captures a plurality of images captured by the camera and a background difference between a background image stored in advance in a storage unit and captured in the case where there is no person in the monitoring area, or sequentially captured by the camera. A person may be detected by extracting a change area on an image based on an inter-frame difference between images. In this case, the sensor terminal obtains the distance measurement data of the person from the position in at least one monitoring area in the change area.

Further, each sensor terminal may be configured to perform a part of processing in the monitoring processing unit of the monitoring terminal. For example, the sensor processing unit of each sensor terminal may track the position of a person existing in the monitoring area, detect the occurrence of each event based on the tracking data, and execute processing corresponding to each event. May be.
Conversely, the monitoring terminal may be configured to perform a part of processing in the sensor processing unit of each sensor terminal. For example, the monitoring processing unit of the monitoring terminal may calculate the position of the person in the monitoring area, may determine whether the sequentially detected persons are the same person, or the person is the authorized person Or non-permitted.
Or you may comprise a sensor terminal and a monitoring terminal with one apparatus.

Moreover, the monitoring terminal is not limited to the outer periphery of the building surrounded by the monitoring area, and may be installed in other places. Alternatively, the monitoring terminal may be a terminal carried by the user. In this case, for example, a relay device is installed in the outer periphery of the building in the monitoring area or in the building. This relay apparatus has an interface circuit for communicating with each sensor terminal and a wireless interface circuit for wirelessly communicating with a monitoring terminal carried by the user, and relays information from each sensor terminal to the monitoring terminal. Send.
The monitoring area is not limited to the site of a detached house, but may be an office, a site of a factory, or the like. In this case, the indoor area is, for example, a room of an office or a factory building.
As described above, those skilled in the art can make various modifications in accordance with the embodiment to be implemented within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Security system 2 Sensor terminal 3 Entrance sensor 4 Monitoring terminal 5 Operation indicator 6 Wireless tag 7 Monitoring center apparatus 21 Sensor 22 Tag reader 23 Camera 24 Memory | storage part 25 In-home communication part 26 Speaker 27 Sensor processing part 271 Moving body detection means 272 The same person Determination unit 271 Authority identification unit 274 Notification unit 41 Home communication unit 42 Center communication unit 43 Input / output unit 44 Storage unit 45 Monitoring processing unit 451 Location tracking unit 452 Event detection unit 453 Determination unit

Claims (3)

It has a monitoring area that circumscribes the non-monitoring area in front of the entrance of the entry restriction area and is set on the outer periphery of the entry restriction area, and detects an entry into the entry restriction area by tracking a person in the monitoring area. A security system,
Storage means for storing a boundary position between the monitoring area and the non-monitoring area;
Detecting means for detecting the position of a person existing in the monitoring area;
Tracking means for tracking a position for each person and detecting a person who newly appears at the boundary position as a person leaving the non-monitoring area;
Identification information acquisition means for acquiring identification information of the person;
Authority identifying means for determining, based on the identification information, for each person detected by the detecting means, whether it is a pre-registered authorized person or a non-permitted person who is not the authorized person;
A passage detecting means for detecting a passing action of a person passing through or entering the entrance restricted area;
A determination means for determining an intrusion abnormality with respect to the entry restricted area when the leaving person who is the permitter is not detected within a predetermined delay time after the passage behavior is detected;
A security system characterized by comprising: The tracking means detects a person who disappears at the boundary position as an approaching person to the non-monitoring area,
The determination means accepts without determining that the passing action is an intrusion abnormality when the entering person is detected and the entering person is a permitter within a predetermined passing period before the passing action is detected. The security system according to claim 1. It further has an operation means for performing the permission operation of the passing action,
The security according to claim 1 or 2, wherein the determination means allows the passage behavior to be permitted without being judged as an intrusion abnormality when the permission operation is performed within the delay time after the passage behavior is detected. system.

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