JP2006323709A - Crime prevention monitor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crime prevention monitor capable of properly distinguishing intrusion of an object or a small animal, from intrusion of a suspicious person (a person). <P>SOLUTION: This crime prevention monitor has: a detection means planarly disposed with a plurality of light emission parts 11 and light reception parts 12 by infrared light, and provided such that the light emission parts and the light reception parts cover a space 10 of a monitoring target; and a distinction means planarly analyzing an infrared cutoff signal obtained by sampling the space of the monitoring target by the detection means to distinguish presence of an intruder. By two-dimensionally analyzing shadow of the intruder, the intrusion of the object or the small animal, and the intrusion of the suspicious person (the person) are properly distinguished. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a crime prevention monitoring device, and more particularly to a crime prevention monitoring device capable of detecting an intrusion of a suspicious person into a specific area such as a house, a building or an apartment before entering the building.

  On the verandas of condominiums and houses, not only intruders (people), but also other small animals (dogs, cats, wild birds, etc.) and things that have been blown off by the wind often enter, It would be desirable to provide a security monitoring device that accurately identifies a suspicious intruder and generates an alarm only when necessary.

Conventionally, a plurality of infrared sensors are arranged one-dimensionally at regular intervals in a warning section, and the time series of blocking information sent from the sensors within a certain time due to passage of a suspicious person is compared with a time series pattern registered in advance. Therefore, an alarm device that determines whether or not an intruder is known is known (Patent Document 1).
JP-A-9-161163 (summary, figure)

  However, since the conventional method does not three-dimensionally (or planarly) monitor the passage of a suspicious person, it is impossible to accurately identify an object and an intruder.

  The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a crime prevention monitoring apparatus capable of accurately identifying objects, small animals, and intruders.

  The above problem is solved by the configuration of FIG. In other words, the crime prevention monitoring device of the present invention (1) is provided with a plurality of infrared light emitting units 11 and a rear receiving unit 12 arranged in a plane and sandwiching the space 10 to be monitored between the light emitting units and the light receiving unit. And detecting means for sampling the space to be monitored by the detecting means and analyzing the obtained infrared cut-off signal in a planar manner to determine the presence or absence of an intruder.

  According to the present invention (1), the infrared blocking signal in the monitoring target space is sampled in a planar manner and analyzed in a planar manner, so that the intrusion of a suspicious person and the invasion of other objects or small animals can be shaded. It can be accurately identified from the difference (size, shape).

  In the present invention (2), in the present invention (1), at least two pairs of detection means (10A, 10B), (10C, 10D) are orthogonal to each other with the space 10 to be monitored interposed therebetween. Thereby, the intruder B can be monitored not only from the side surface but also from the upper surface at the same time, and the intruder's intrusion can be more accurately identified from the other based on the characteristic analysis of these blocking signals.

  In the present invention (3), in the present invention (2), the discriminating means determines that there is an intruder due to the sum of the number of infrared ray blocking detected in the continuous areas on the detection surfaces 10B and 10D exceeding a predetermined number. It is to be determined.

By the way, it is generally considered that an intruder enters the monitoring area 10 in various postures. However, in FIG. 1, if a suspicious person stands and invades, the shadow on the side surface is large and the shadow on the top surface is small. On the other hand, if a suspicious person hits and invades, the shadow on the side is small and the shadow on the top surface is large.

  In the present invention (3), in order to determine the presence or absence of an intruder based on the total number of continuous infrared ray blocking (shadows) on each of the detection surfaces 10B and 10D, the suspicious person enters the monitoring area 10 in any posture. However, the size of the total shadow is constant according to the physique of the intruder, and thus the intruder and the other can be accurately identified by simple processing.

  In the present invention (4), in the above-mentioned present invention (3), the calculation means for analyzing the infrared ray blocking signal in a plane to identify the position of the intruder in the monitored space, and the camera line of sight is directed to the specified position. The monitoring camera 24 that captures the image of the intruder and the communication means that transmits the captured image to the preset notification destination 40 are provided.

  In the present invention (4), a configuration in which an image of the intruder B is notified to a remote user (user A, patrol patrol, etc.) in real time enables the user to accurately determine the state and characteristics of the intruder. This can be one of the criteria for the user to take an appropriate action after receiving the image.

  In the present invention (5), in the above-mentioned present invention (4), the communication means connects the call to the preset monitoring center 30 via the network 100, and then distributes the image taken by the monitoring camera 24. is there.

  In the present invention (5), the intruder's image is distributed to the remote crime prevention monitoring center 30 in real time, so that it is possible to appropriately notify the inspector's characteristics and actions to the nearest patrol patrol officer. Appropriate implementation of on-site treatment actions.

  As described above, according to the present invention, since the intrusion of a suspicious person can be accurately identified, it greatly contributes to improving the reliability of alarm generation.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. Note that the same reference numerals denote the same or corresponding parts throughout the drawings. FIG. 1 is a diagram showing a configuration of a crime prevention monitoring system according to an embodiment, and shows a case where a monitoring area 10 is monitored by left and right surfaces 10A and 10B and upper and lower surfaces 10C and 10D.

  In the figure, 10 is a space to be monitored (eg, a veranda), 10A to 10D are detection surfaces assumed to surround the space 10, 11 is an infrared light emitting unit, 12 is an infrared light receiving unit, and 24 is equipped with a night vision function. A monitoring camera (capable of collecting voice), 20 is a monitoring device that controls the infrared monitoring units 10A to 10D and the monitoring camera 24, 21 is a camera control unit that controls the monitoring camera 24, and 22 is a monitoring that performs the main control of crime prevention monitoring. The control unit 23 is a communication control unit (CIF) having a known TV phone function using the Internet, 100 is a network (NW) such as the Internet, and 30 is a security guard contracted by a user A who uses this system. A security monitoring center 40 is a mobile terminal owned by the user A.

  Left and right surfaces 10A and 10B and upper and lower surfaces 10C and 10D are provided so as to surround the space 10 to be monitored, and a plurality of infrared light emitting units 11 are two-dimensionally arranged on the right side surface 10A of these at equal intervals, and the opposing surface 10B , The same number of infrared light receiving portions 12 are arranged at opposite positions. In addition, a plurality of infrared light emitting units 11 are arranged on the floor surface 10C at two-dimensional equal intervals, and the same number of infrared light receiving units 12 are arranged on the opposing surface 10D at opposing positions.

Each infrared light receiving unit 12 is logically assigned an address, each light receiving unit 12 on the side surface 10B has a logical address Y _{11 to} Y _nm , and each light receiving unit 12 on the top surface 10D has a logical address T _{11 to} T _nm. Is granted. Therefore, when a suspicious person enters, it is possible to accurately determine which part of the monitoring space 10 is obstructed by the address (T _ij , Y _kl) of the intersection of the vertical and horizontal light receiving units 12 where the infrared beam is blocked. I can figure it out. Hereinafter, the operation of the crime prevention monitoring system according to the embodiment will be described in detail.

  2 to 5 are flowcharts (1) to (4) of the crime prevention management process according to the embodiment. FIG. 2 shows the main process, which is executed by the monitoring control unit 22. When power is supplied to the apparatus, this process is entered. In step S11, the apparatus is initialized. In step S12, a monitoring start command from the outside (the crime prevention monitoring center 30 or the user A) is waited. When monitoring starts, a monitoring timer is started in step S13. Thereby, the intruder monitoring process of FIG. 3 using the infrared sensor is performed at predetermined time intervals (for example, at intervals of 10 ms).

  In step S14, waiting for an alarm flag indicating intruder detection = 1 (ON), the intruder B enters the monitoring area 10, and the intruder B is detected by the processing of FIG. When it becomes 1, in step S15, the monitoring flag = 1 (ON) indicating that monitoring is in progress is made when the intruder is first detected after the start of the monitoring. In step S16, after the intruder B leaves the monitoring area 10, a delay timer is started to delay the monitoring end timing for a predetermined time.

  In step S17, a predetermined alarm notification is sent to the remote crime prevention monitoring center 30. This warning notification includes information (name, address, monitoring location, etc. of the subscriber A) that specifies the monitoring target location together with the alarm information indicating that there is an intruder. In step S18, the control process of the monitoring camera 24 shown in FIG. 4 is started. In step S19, it waits for the monitoring flag to be 0 (no intruder detected), and the monitoring by the infrared sensor and the monitoring camera 24 is continued in this section. Details of these will be described later with reference to FIGS.

  Eventually, when the monitoring flag = 0 (not monitoring), it is determined in step S20 whether or not it is an external monitoring stop command. If not, the process returns to step S14 to detect a new intruder. Wait for it. Thus, until the monitoring is terminated from the outside, synchronization with the intruder's intrusion is performed, and the necessary minimum monitoring and the alarm notification for the intruder are efficiently performed.

  If the monitoring is stopped in the determination in step S20, the monitoring flag is set to 0 in step S21. In step S22, the monitoring timer is stopped, and the process returns to step S12.

  FIG. 3 is a diagram showing a monitoring timer interrupt process. When a monitoring timer (for example, 10 ms) times out, an interrupt is input to this process. In step S31, infrared beam detection signals in the monitoring area are collected and stored in the memory. In step S32, the presence / absence of an intruder is determined based on the shut-off information of the infrared beam.

FIG. 6 shows an image of the intruder determination process. FIG. 6A shows the detection surface 10B at the time when a suspicious person enters, and here, the signal of each light receiving unit 12 corresponding to the shadow of the intruder B is in a blocking state (OFF). Although not shown, the same applies to the upper detection surface 10D. As shown in the figure, when a suspicious person walks in and enters, the shadow of the side surface 10B is large and the shadow of the top surface 10D is small. On the other hand, when a suspicious person invades, the shadow of the side surface 10B is small and the shadow of the top surface 10D is large. In any case, the area of the shadowed portion is constant according to the physique of the person, and it can be determined that there is an intruder when the sum of the shadows on the side surface 10B and the upper surface 10D is greater than or equal to a predetermined value. Note that a single shadow at a distant position is regarded as noise. Therefore, even if a suspicious person enters the monitoring area 10 in any posture, the intruder and other objects can be accurately identified by a simple process for obtaining the total sum of shadows caused by the suspicious person.

  Returning to FIG. 3, it is determined whether or not there is an intruder in step S33, and if there is, an alarm flag = 1 (ON) is set in step S34. In step S35, the position of the intruder is determined based on the cutoff information of the infrared beam. In step S36, information on the viewpoint to which the surveillance camera 24 should be directed is obtained and output to the camera control unit 21, and the process is exited.

  Referring to FIG. 6A again, it can be determined that the position of the intruder B is, for example, at the intersection of the shadow center position on the detection surface 10B and the shadow center position on the detection surface 10D. Further, as the position of the viewpoint to which the surveillance camera 24 should be directed, generally considering that the human feature is on the upper body side, if the shadow of the side surface 10B has a vertically long shape, 1 / 3 (2/3 from the bottom), and if the shadow of the upper surface 10D has a long and narrow shape, the long side is 1/3 from the front (2/3 from the rear). ) Is the center, and the intersection of these positions is the position of the viewpoint to which the surveillance camera 24 should be directed.

  Thus, when there is an intruder during monitoring (alarm flag = 1), the viewpoint information for directing the camera 24 according to the movement of the intruder is periodically output. If it is determined in step S33 that there is no intruder, the alarm flag is set to 0 (OFF) in step S37, and the process is exited. That is, the viewpoint information is not output.

  FIG. 4 is a diagram showing the monitoring camera control process, which is executed by the camera control unit 21. In step S41, the camera activation command from the monitoring control unit 22 is waited. When there is an activation command, the camera viewpoint information from the monitoring control unit 22 is waited in step S42. Eventually, when viewpoint information is input, it is acquired in step S43, and in step S44, the direction of the monitoring camera 24 is controlled to the direction of the viewpoint information (tilt T and / or rotate R).

  In FIG. 6A, the line of sight of the camera is directed to the point Q (chest hit) of the suspicious person who has entered the surveillance area 10, so that the surrounding circular area R surrounding the head of the intruder B is within the field of view. In. When the surveillance camera 24 has a zoom function, the zoom may be automatically set so that an image having a required size is always obtained according to the distance from the surveillance camera to the intruder B.

  In step S45, a still image of the intruder B is first taken and stored in a still image file. In step S46, an alarm e-mail is created for user A, and a still image is attached and transmitted. By viewing the received mail, the user A can see the alarm occurrence and the image of the intruder, and can quickly grasp the alarm state. In step S 47, the monitoring camera 24 continues to collect voices and captures moving images, and distributes them to the remote crime prevention monitoring center 30. At the same time, this moving image may be stored in a moving image file of the monitoring device 20.

  After that, shooting of moving images is continued. That is, in step S48, input of new viewpoint information is awaited. When viewpoint information is input, the viewpoint information is acquired in step S49. In step S50, the monitoring camera 24 is controlled in the direction of the viewpoint information. In FIG. 6B, the suspicious person B is further moved inward, and the detection position of the intruder B by the monitoring control unit 22 is also moved accordingly. In accordance with this, the viewpoint Q of the camera 24 is also moved (rotated), and thus the intruder B is always captured in the field of view of the camera 24. Thus, the intruder B can be automatically tracked by the camera 24 with a simple configuration and control. In step S51, it is determined whether or not the monitoring flag = 1 (monitoring). If the monitoring flag is being monitored, the process returns to step S48. If the monitoring flag = 0 (not being monitored), the process returns to step S41 to wait for a new start command.

FIG. 5 is a diagram showing a delay timer interrupt process. When the delay timer is activated, a predetermined cycle (for example, 1
An interrupt is input to this process at ms cycle). In step S61, it is determined whether or not the alarm flag = 1 (during alarm). When the alarm flag = 0 (during non-alarm), the counter CNTR is incremented by 1 in step S62. In step S63, it is determined whether or not CNTR> N (predetermined threshold value), and the process is terminated as long as CNTR> N is not satisfied. Thus, when CNTR> N is determined in step S63, the monitoring flag is set to 0 (not being monitored) in step S64. In step S65, the delay timer is stopped and the process is exited. As a result, the monitoring flag is reset when the alarm flag = 0 (intruder cannot be detected) continues for a predetermined time. If the alarm flag is temporarily reset halfway, CNTR = 0 is set in step S66, and the delay count is restarted.

  FIG. 7 is a diagram showing a configuration of a monitoring system according to another embodiment, and shows a case where infrared detection surfaces are provided only on the left and right surfaces 10A and 10B of the monitoring area 10. FIG. Even if the intruder is detected on the two left and right surfaces 10A and 10B, the intruder B can be reliably detected as long as the intruder B does not enter in a special posture (for example, lying down). Moreover, if an intruder can be detected on two surfaces, the number of infrared sensors can be greatly reduced, and the present invention can be realized at low cost.

  However, since this method cannot accurately grasp the horizontal intrusion position of the monitoring area 10, the surveillance camera 24 in this case monitors obliquely from, for example, the side of the surface 10B in the monitoring area 10 so that the intruder Even if it invades, it is kept within the field of view.

  Further, in this example, the light emitting units 11 and the light receiving units 12 are provided alternately for adjacent infrared beams. That is, the light emitting units 11 and the light receiving units 12 are alternately arranged on the detection surface 10A, and the light receiving units 12 and the light emitting units 11 are arranged alternately on the detection surface 10B facing the detection surface 10A. Thereby, even if an infrared beam is approached, beam interference between adjacent detection channels can be effectively reduced, and thus the resolution of the infrared detection unit can be increased.

  Although not shown, the monitoring surfaces may be provided only on the upper and lower surfaces 10CA and 10D. Moreover, although the said embodiment described the case where a still image was transmitted to the user A and a moving image was transmitted to the crime prevention monitoring center 30, it is not restricted to this. Still images or moving images may be transmitted to any of these.

  Further, although the preferred embodiment of the present invention has been described, it goes without saying that various changes in the configuration, control, processing, and combination of each part can be made without departing from the spirit of the present invention.

    (Supplementary note 1) A plurality of light emitting portions and receiving portions using infrared rays are arranged in a plane, and a detecting means provided so as to sandwich a space to be monitored between the light emitting portion and the light receiving portion, and the monitoring means A crime prevention monitoring device comprising: a discriminating means for discriminating the presence or absence of an intruder by sampling a space and analyzing the obtained infrared cut-off signal in a plane.

    (Additional remark 2) The crime prevention monitoring apparatus of Additional remark 1 characterized by making at least 2 pair of detection means orthogonally crossed in the aspect which pinches | interposed the space to be monitored.

    (Supplementary note 3) The security monitoring device according to supplementary note 2, wherein the discrimination means discriminates that there is an intruder when the sum of the number of infrared rays detected in a continuous area on each detection surface exceeds a predetermined number. .

(Additional remark 4) The calculating means which analyzes an infrared rays cut-off signal planarly, and specifies the position of the intruder in the monitoring object space, The monitoring camera which directs a camera line of sight to the specified position, and images an intruder Communication means for transmitting the captured image to a preset notification destination;
The crime prevention monitoring device according to appendix 3, characterized by comprising:

    (Supplementary note 5) The crime prevention monitoring device according to supplementary note 4, wherein the communication means distributes an image taken by a surveillance camera after connecting a call to a preset surveillance center via a network.

    (Additional remark 6) The crime prevention monitoring apparatus of Additional remark 2 characterized by the above-mentioned. A detection means is provided with each light emission part and light-receiving part alternately with respect to an adjacent infrared beam. Thereby, even if an infrared beam is brought close, beam interference between adjacent channels can be effectively reduced.

It is a figure which shows the structure of the crime prevention monitoring system by embodiment. It is a flowchart (1) of the crime prevention management process by embodiment. It is a flowchart (2) of the crime prevention management process by embodiment. It is a flowchart (3) of the crime prevention management process by embodiment. It is a flowchart (4) of the crime prevention management process by embodiment. It is an image figure of the intruder determination process by embodiment. It is a figure which shows the structure of the crime prevention monitoring system by other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Monitoring object space 10A-10D Detection surface 11 Infrared light emission part 12 Infrared light reception part 20 Monitoring apparatus 21 Camera control part 22 Monitoring control part 23 Communication control part (CIF)
24 surveillance camera 30 security monitoring center 40 mobile terminal 100 network (NW)

Claims (5)

A plurality of light emitting portions and receiving portions by infrared rays arranged in a plane, and a detection means provided so as to sandwich a space to be monitored between the light emitting portion and the light receiving portion;
A crime prevention monitoring apparatus comprising: a determination unit that samples a space to be monitored by the detection unit and determines whether or not there is an intruder by planarly analyzing the obtained infrared cut-off signal. 2. The crime prevention monitoring apparatus according to claim 1, wherein at least two pairs of detection means are orthogonal to each other in such a manner as to sandwich the space to be monitored. 3. The crime prevention monitoring apparatus according to claim 2, wherein the discrimination means discriminates that there is an intruder when the sum of the number of infrared ray cuts detected in a continuous area on each detection surface exceeds a predetermined number. A computing means for analyzing the infrared cut-off signal in a plane and identifying the position of the intruder in the monitored space;
A surveillance camera that directs the camera's line of sight to the identified position and captures an intruder image;
The crime prevention monitoring apparatus according to claim 3, further comprising: a communication unit that transmits the photographed image to a preset notification destination. 5. The security monitoring apparatus according to claim 4, wherein the communication means distributes an image captured by the monitoring camera after connecting a call to a preset monitoring center via a network.

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