JP2013134675A - Monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a monitoring system for avoiding erroneous intrusion detection while enlarging a detection area.SOLUTION: A monitoring system 100 includes: a radio wave sensor device 10; a monitoring camera 20; and a monitoring device 30. The radio wave sensor device 10 includes: a transmission part 11 for transmitting a radio wave to a space 101 to be monitored; a reception part 12 for receiving the reflected radio wave; and a signal processing part 13 for outputting a signal corresponding to a change in the receiving state of the received radio wave to the monitoring device 30. The monitoring camera 20 includes an image sensor 23, and outputs a video imaged by the image sensor 23 to the monitoring device 30. The monitoring device 30 determines the existence of an intruder in the space 101 on the basis of a signal from the radio wave sensor device 10 and the video from the monitoring camera 20.

Description

  The present invention relates to a monitoring system for monitoring intrusion into a building.

  In recent years, due to an increase in crime prevention awareness, there is an increasing demand for a monitoring system that monitors intrusion into a building. In general, a monitoring system includes a sensor for detecting an intruder and a monitoring device. The monitoring device detects an intruder based on a signal from the sensor, and outputs an alarm if detected. Examples of the sensor include an image sensor, a heat ray sensor, an infrared sensor, an acoustic sensor, a magnet sensor, an impact sensor, a pressure sensor, and a radio wave sensor.

  In such a monitoring system, an image sensor is most used. The image sensor is a so-called individual image sensor, and constitutes a monitoring camera together with an optical lens or the like. If an image sensor is used, an intruder can be specified by an image, so that an intrusion can be reliably detected.

  However, the image sensor has a problem that the intruder cannot be photographed if the intruder is positioned at a blind spot. For this reason, the radio wave sensor is attracting attention because it can cover a wider area than the image sensor (see, for example, Patent Documents 1 and 2).

  As disclosed in Patent Documents 1 and 2, the radio wave sensor includes a transmitter that transmits radio waves and a receiver. In the radio wave sensor, the radio wave transmitted from the transmitter is received by the receiver while being reflected inside the building. Therefore, when someone enters the building, the reception state of the radio wave received by the receiver changes. Therefore, the monitoring device detects the intrusion and outputs an alarm based on this change.

  In addition, since radio waves can reach the shadows of the image sensor, the reception state of the radio waves received by the receiver changes even if an intruder is present at a position that becomes a blind spot in the image sensor. Therefore, as described above, when a radio wave sensor is used, an intruder can be detected in a wider range than an image sensor.

JP 2010-66877 A JP 2011-27704 A

  However, in the radio wave sensor, the area that can be detected is widened, but since the detection target cannot be confirmed, the monitoring device may make an erroneous determination. For example, even if an object falls from a shelf in a room, the reception state of the radio wave received by the receiver changes, so the monitoring device determines that someone has entered. . In addition, even if nothing changes in the building, the reception state of the radio waves may change with the passage of time, and in this case also, the monitoring device determines that someone has entered. .

  An example of the object of the present invention is to provide a monitoring system capable of solving the above-described problems and expanding a detection area while avoiding erroneous intrusion detection.

  In order to achieve the above object, a monitoring system according to one aspect of the present invention is a monitoring system for monitoring a space to be monitored, and includes a radio wave sensor device, a monitoring camera, and a monitoring device. The sensor device includes: a transmitter that transmits radio waves toward the space; a receiver that receives the radio waves reflected in the space; and a signal corresponding to a change in a reception state of the received radio waves. A signal processing unit that outputs to the monitoring device, the monitoring camera includes an image sensor, and outputs the video imaged by the image sensor to the monitoring device, and the monitoring device outputs the signal from the radio wave sensor device. And the presence of an intruder in the space is determined based on the video from the surveillance camera.

  With the above features, the monitoring system according to the present invention can detect an intruder using information from the radio wave sensor device and the monitoring camera. For this reason, according to the present invention, it is possible to avoid erroneous intrusion detection while expanding the detection area.

  In the monitoring system according to the present invention, the signal processing unit of the radio wave sensor device determines whether or not a change in the reception state of the radio wave received by the receiving unit matches a preset pattern. According to the result, it is preferable that a signal indicating that no intruder exists or a signal indicating that an intruder exists is output to the monitoring device.

  In the above aspect, the monitoring device has a function of detecting a person existing in the space based on the video from the monitoring camera, and when the person cannot be detected in the space, The signal processing unit of the radio wave sensor device is received when it is notified that there is no human being in the space. It is preferable that a change in the reception state of the radio wave is specified, and the pattern when the person is not present in the space is created using the specified change. In this case, the calibration in the radio wave sensor device can be automatically executed, so that the detection accuracy is improved and the burden on the administrator is reduced.

  Moreover, in the said aspect, the pattern in case the person who exists in the said space moves to a specific direction is preset as the said pattern, The change of the reception state of the said radio wave received by the said receiving part However, when the pattern matches the pattern, it is preferable that the signal processing unit of the radio wave sensor device outputs a signal indicating that there is an intruder moving in the specific direction to the monitoring device. . In this case, the moving direction of the intruder can be specified.

  In the above case, the monitoring camera includes an imaging direction variable mechanism that changes an imaging direction in response to an instruction from the monitoring device, and the monitoring device first receives the signal from the radio wave sensor device. Whether or not an intruder is present, and if it is determined that the intruder exists, the monitoring camera is instructed about the imaging direction according to the detected moving direction of the intruder, and the instructed More preferably, when a video imaged in the imaging direction is output, it is determined again whether the intruder exists based on the video image.

  In the above case, when the intruder is hidden behind the shield, it can be predicted which route the intruder will come out of the shield, and the imaging direction of the surveillance camera can be set in advance. Therefore, the place where the intruder came out of the shield can be surely captured.

  Moreover, it is preferable that the monitoring system according to the present invention is an aspect in which the monitoring device activates the monitoring camera in response to the signal from the radio wave sensor device. Since the radio wave sensor device consumes less power than a surveillance camera and has a wider detection area, this mode makes it possible to suppress power consumption of the entire system while performing sufficient monitoring. Become.

  Furthermore, in the monitoring system according to the present invention, when the monitoring device determines that the intruder exists in the space, the monitoring system uses the video from the monitoring camera to detect the intruder. It is also preferable that the face recognition process is executed to determine whether or not the intruder corresponds to a person registered in advance. If it is set as this aspect, it will become possible to avoid the situation where a warning is given accidentally with respect to the person who is not an intruder.

  As described above, according to the monitoring system of the present invention, it is possible to avoid erroneous intrusion detection while expanding the detection area.

FIG. 1 is a diagram showing an overall configuration of a monitoring system according to Embodiment 1 of the present invention. FIG. 2 is a block diagram showing the configuration of each device constituting the monitoring system in the first embodiment of the present invention. FIG. 3 is a diagram for explaining a case where the blind spot of the monitoring camera exists in the space to be determined in the embodiment of the present invention. FIG. 4 is a flowchart showing the operation of the monitoring system in the embodiment of the present invention. FIGS. 5A and 5B are diagrams illustrating an example of a time-series change in the result of signal processing of radio waves received by the reception unit of the radio wave sensor device. FIG. 6 is a diagram illustrating a non-intrusion pattern automatic generation process performed by the monitoring system according to the embodiment of the present invention.

(Embodiment)
Hereinafter, a monitoring system according to an embodiment of the present invention will be described with reference to FIGS.

[System configuration]
Initially, the whole structure of the monitoring system in Embodiment 1 of this invention is demonstrated using FIG. FIG. 1 is a diagram showing an overall configuration of a monitoring system according to Embodiment 1 of the present invention.

  A monitoring system 100 according to the first embodiment shown in FIG. 1 is used to monitor a space 101 to be monitored. As shown in FIG. 1, the monitoring system 100 includes a radio wave sensor device 10, a monitoring camera 20, and a monitoring device 30.

  The radio wave sensor device 10 and the monitoring camera 20 are disposed in the space 101, and the monitoring device 40 is based on the signal output from the radio wave sensor device 10 and the video output from the monitoring camera 20. The presence of the intruder 102 is determined. In the present embodiment, the space 101 is a space inside the building.

  In the present embodiment, the radio wave sensor device 10 and the monitoring camera 20 are connected to the monitoring device 30 via a network 40 such as a LAN (Local Area Network). 1 and 2, reference numeral 41 denotes a router for connecting the radio wave sensor device 10 and the monitoring camera 20 to the network 40, and reference numeral 42 denotes a router for connecting the monitoring device 30 to the network.

  As described above, in the first embodiment, the monitoring system 100 includes the radio wave sensor device 10 and the monitoring camera 20, and all the information from both is collected in the monitoring device 30, and the monitoring device 40 collects these information. Can be used to detect intruders. For this reason, according to the first embodiment, it is possible to avoid erroneous intrusion detection while expanding the detection area. This will be specifically described below.

  Here, in addition to FIG. 1, the structure of each apparatus which comprises the monitoring system 100 is demonstrated using FIG. FIG. 2 is a block diagram showing the configuration of each device constituting the monitoring system in the first embodiment of the present invention.

  As shown in FIGS. 1 and 2, the radio wave sensor device 10 is received by a transmitting unit 11 that transmits radio waves into the space 101 and a receiving unit 12 that receives radio waves reflected in the space 101. And a signal processing unit 13 that outputs a signal corresponding to a change in the reception state (intensity, etc.) of the radio wave to the monitoring device 30.

  In the present embodiment, the transmitter 11 is a transmitter that transmits radio waves of a specific wavelength from an antenna. The receiving unit 12 includes four antennas and four receivers R1 to R4 provided for each antenna. The radio wave transmitted from the transmitter 11 is reflected by the wall of the space 101, then enters each antenna, and is received by the corresponding receiver. Each of the receivers R <b> 1 to R <b> 4 outputs a signal specifying the reception state of the received radio wave to the signal output unit 13.

A specific example of the radio wave sensor device 10 used in the present embodiment is a radio wave sensor device described in the following reference.
(References) Shun Kawakami, Toshihiro Hong, Tomoaki Ohtsuki, "Location Estimation System Using Array Sensor Based on Dimension Expansion of Signal Subspace Using Support Vector Machine", The Institute of Electronics, Information and Communication Engineers, IEICE Technical Report ( IEICE Technical Report RCS2010-311 (2011-03))

  In the present embodiment, the signal processing unit 13 determines whether the change in the reception state of the radio wave received by the receiving unit 12 matches a preset pattern. Then, a signal indicating that no intruder exists or a signal indicating that an intruder exists is output to the monitoring device 30 according to the determination result.

  In the present embodiment, as a determination reference pattern, a pattern in the case where no person exists in the space 101 (hereinafter referred to as “non-intrusion pattern”) and a person exists in the space 101. Pattern (hereinafter referred to as “intrusion pattern”) is set. Among these, the latter pattern may be set for each moving direction of the person existing in the space 101.

  For example, a pattern when a person is moving toward the north side in the space 101, a pattern when a person is moving toward the south side within the space 101, or the like may be set. In this case, the signal processing unit 13 outputs a signal indicating that the intruder is moving in the direction set by the matched pattern to the monitoring device 30.

  As shown in FIG. 2, in the present embodiment, the surveillance camera 20 includes an imaging unit 21 and a video output unit 24. Among these, the imaging unit 21 further includes an image sensor 23 and an optical lens 22 that forms an optical image in a light receiving area of the image sensor 23. In addition, the imaging unit 21 includes other necessary circuits and the like.

  The video output unit 24 outputs the video captured by the imaging unit 21 to the monitoring device 30. Specifically, the video output unit 24 performs processing such as digital conversion and noise removal on the imaging data output from the image sensor 23 and outputs the obtained digital data to the monitoring device 30 as a video. .

  In addition, the monitoring camera 20 includes an imaging direction variable mechanism 25 that changes the imaging direction of the imaging unit 21 in response to an instruction from the monitoring device 30. Specifically, the imaging direction variable mechanism 25 is a turntable, a tilt mechanism, or the like incorporated in a general surveillance camera.

  As shown in FIG. 2, in the present embodiment, the monitoring device 30 includes a determination processing unit 31 and a face recognition processing unit 32. The determination processing unit 31 determines the presence of an intruder in the space 101 based on the signal output from the radio wave sensor device 10 and the video output from the monitoring camera 20. When it is determined that an intruder exists in the space, the face recognition processing unit 32 performs a face recognition process on the intruder using the video from the monitoring camera 20, and the intruder It is determined whether it corresponds to a registered person.

  Moreover, in this Embodiment, the determination process part 31 can perform the following determination processes. First, the determination processing unit 31 determines whether there is an intruder based on a signal from the radio wave sensor device 10. At this time, if the radio wave sensor device 10 uses a pattern in which the moving direction is defined, if the intruder exists, the moving direction of the intruder 102 is also specified.

  Next, when the determination processing unit 31 determines that it is present, the determination processing unit 31 instructs the monitoring camera 20 in an imaging direction corresponding to the detected moving direction of the intruder. Then, when a video imaged in the designated imaging direction is output from the monitoring camera 20, the determination processing unit 31 determines again whether there is an intruder based on the video image.

  Such a determination process is effective when, for example, a blind spot of the monitoring camera 20 exists in the space 101 as shown in FIG. FIG. 3 is a diagram for explaining a case where the blind spot of the monitoring camera exists in the space to be determined in the embodiment of the present invention.

  In the example of FIG. 3, a shield 103 such as a partition, a bookshelf, and a locker is arranged in the space 101. In this case, if the intruder 102 is hidden behind the shield 103, the surveillance camera 20 cannot detect the intruder 102. Further, depending on the imaging direction of the monitoring camera 20, there may occur a case where the intruder 102 cannot catch the place where the intruder 102 comes out of the shield 103.

  However, according to the determination process described above, the monitoring device 30 can appropriately set the imaging direction of the monitoring camera 20 based on the signal from the radio wave sensor device 10 even if the intruder 102 cannot be detected by the monitoring camera 20. Can be set. Therefore, the surveillance camera 20 can reliably capture the place where the intruder 102 has come out of the shield 103.

  In the example of FIG. 3, the intruder path 1 and the intrusion path 2 are given as the moving directions of the intruder 102 to be specified. Therefore, in the signal processing unit 13 of the radio wave sensor device 10, a non-intrusion pattern, an intrusion pattern when a person is moving along the intrusion route 1 (hereinafter referred to as “intrusion pattern 1”), and a person intrudes. An intrusion pattern (hereinafter referred to as “intrusion pattern 2”) when moving along the path 2 is required. The pattern creation procedure will be described later.

  In the present embodiment, among the patterns used by the signal processing unit 13 of the radio wave sensor device 10, the pattern when no person is present in the space 101, that is, the non-intrusion pattern is the radio wave sensor device 10, It is automatically created by the cooperation of the monitoring camera 20 and the monitoring device 30.

  Specifically, in the present embodiment, the determination processing unit 31 of the monitoring device 30 can detect a person existing in the space 101 based on the video from the monitoring camera 20. Further, when the person cannot be detected in the space 101, the determination processing unit 31 can also notify the radio wave sensor device 10 that no person is present in the space 101.

  When the above notification is received, the signal processing unit 13 of the radio wave sensor device 10 identifies a change in the reception state of the radio wave received by the reception unit 12 at that time, and the identified change is used as a pattern. For example, this pattern is a non-intrusive pattern when no person is present in the space 101.

  In the present embodiment, the determination processing unit 31 in the monitoring device 30 can activate the monitoring camera 20 in accordance with a signal from the radio wave sensor device 10. Since the radio wave sensor device 10 has lower power consumption and a wider detection area than the monitoring camera 20, in the above case, it is possible to suppress power consumption of the entire system while performing sufficient monitoring. become.

[System operation]
Next, the operation of the monitoring system 100 according to the embodiment of the present invention will be described with reference to FIGS. In the following description, FIGS.

  First, the operation of the monitoring system 100 will be described with reference to FIG. FIG. 4 is a flowchart showing the operation of the monitoring system in the embodiment of the present invention. In the following description, it is assumed that the shielding object 103 is disposed inside the space 101 to be determined as shown in FIG.

  As shown in FIG. 4, first, in the radio wave sensor device 10, the signal processing unit 13 determines whether or not someone has entered the space 101 to be monitored (step A1). Specifically, the signal processing unit 13 determines whether the change in the reception state of the radio wave received by the intruder receiving unit 12 does not match the non-intrusion pattern.

  If the result of determination in step A1 matches the non-intrusion pattern, the radio wave sensor device 10 enters a standby state, and radio wave transmission by the transmitter 11 is continued. On the other hand, if the result of determination in step A1 does not match the non-intrusion pattern, the signal processing unit 13 indicates that the change in the reception state of the radio wave received by the intruder receiving unit 12 It is confirmed whether it matches with either pattern 1 or intrusion pattern 2 (step A2).

  In step A2, if the result of the confirmation indicates that either the intrusion pattern 1 or the intrusion pattern 2 matches, the signal processing unit 13 has moved the intruder 102 along the set intrusion route. A signal indicating this is output to the monitoring device 30. On the other hand, when neither the intrusion pattern 1 nor the intrusion pattern 2 matches, the signal processing unit 13 outputs a signal indicating only that the intruder 102 exists to the monitoring device 30.

  Next, in the monitoring device 30, when receiving the signal from the radio wave sensor device 10, the determination processing unit 31 determines whether the route of the intruder 102 is specified based on the received signal (step A3). .

  As a result of the determination in step A3, when the route of the intruder is specified, the determination processing unit 31 determines the imaging direction in accordance with the specified route (the intrusion route 1 or the intrusion route 2) with respect to the monitoring camera 20. (Step A11).

  Specifically, in FIG. 3, since the intruder 102 is moving behind the shielding object 103, the determination processing unit 31 sets the imaging direction of the monitoring camera 20 in a direction in which the intruder 102 can be easily captured. Set. When a turntable is used as the imaging direction variable mechanism 25 (see FIG. 2), the determination processing unit 31 instructs the monitoring camera 20 to turn by specifying an angle. Thereafter, the determination processing unit 31 executes Step A7.

  On the other hand, when the route of the intruder is not specified as a result of the determination in step A3, the determination processing unit 31 determines whether or not the intruder 102 is imaged by the monitoring camera 20 (step A4).

  If the intruder 102 is not imaged by the monitoring camera 20 as a result of the determination in step A4, the determination processing unit 31 determines whether the radio wave sensor device 10 continues to detect the intruder (step A12). . Specifically, the determination processing unit 31 determines whether or not the radio wave sensor device 10 continues to output the signal in step A2.

  As a result of the determination in step A12, when the radio wave sensor device 10 continues to detect the intruder 102, the determination processing unit 31 instructs the radio wave sensor device 10 to execute step A2 again. On the other hand, when the radio wave sensor device 10 does not continue to detect the intruder as a result of the determination in step A12, the process in the monitoring device 30 ends.

  If the radio wave sensor device 10 continues to detect the intruder 102 as a result of the determination in step A12, the intruder may have placed something in the space 101. Therefore, in this case, the determination processing unit 31 can also output a message to that effect to the administrator.

  If the intruder is imaged by the monitoring camera 20 as a result of the determination in step A4, the determination processing unit 31 specifies the position of the intruder 102 based on the video (step A5). Next, the determination processing unit 31 instructs the monitoring camera 20 in the imaging direction according to the specified position (step A6).

  Next, after executing Step A6 and Step A11, the determination processing unit 31 records the video from the monitoring camera 20 in a storage device (not shown in FIGS. 1 and 2) (Step A7). When step A7 is executed, in the monitoring device 30, the face recognition processing unit 32 executes face recognition processing for the intruder 102 using the recorded video (step A8). It is determined whether it corresponds to a registered person (step A9).

  As a result of the determination in step A9, when the intruder 102 corresponds to a person registered in advance, the determination processing unit 31 stops the recording disclosed in step A7 (step A13), and the process in the monitoring device 30 ends. To do.

  On the other hand, as a result of the determination in step A9, when the intruder 102 does not correspond to a person registered in advance, the determination processing unit 31 outputs an alarm to the outside, and further, the surveillance camera 20 detects the intruder 102. Tracking is performed (step A10). Note that step A10 is executed for a certain period or until the administrator stops the system, and then the processing in the monitoring device 30 ends.

  As described above, according to the first embodiment, the monitoring system 100 detects the intruder 102 using information from the radio wave sensor device 10 and the monitoring camera 20. For this reason, according to the first embodiment, it is possible to avoid erroneous intrusion detection while expanding the detection area.

  In addition, as in the example shown in FIG. 3, when the intruder 102 starts moving even if lurking in the blind spot of the surveillance camera 20, the moving direction of the intruder 102 is specified, so that the intruder 102 moves out of the blind spot. In the case of an intruder 102, the intruder 102 is surely caught.

  Here, a procedure for creating an intrusion pattern will be described with reference to FIGS. 5 (a) and 5 (b). FIGS. 5A and 5B are diagrams illustrating an example of a time-series change in the result of signal processing of radio waves received by the reception unit of the radio wave sensor device. Among these, Fig.5 (a) shows the change of the signal processing result when a person moves along the penetration | invasion path | route 1 in the space used as determination object, FIG.5 (b) shows in the space used as determination object. The change of the signal processing result when a person moves along the intrusion route 2 is shown.

  The changes in the signal processing results shown in FIGS. 5A and 5B are obtained by allowing a person to enter the space 101 and move along the intrusion route 1 and the intrusion route 2. 5A and 5B, the horizontal axis indicates time. The vertical axis indicates two combinations (for example, R1 and R2 are S1, R2 and R3 are S2, R3 and R4 are S3, R4 and R1 from the radio wave intensity / phase information acquired by each of the receivers R1 to R4. And S4), and the result of signal processing using the selected combination is shown (reference: the above-mentioned reference).

  First, when the signal processing unit 13 obtains a change in radio wave intensity and phase when a person moves along the intrusion path 1 from the receiving unit 12, the signal processing unit 13 performs signal processing on the change, and the graph shown in FIG. Create Then, the signal processing unit 13 extracts a portion L1 corresponding to the time from when the person is exposed from the shielding object 103 along the intrusion path 1 from the position behind the shielding object 103 in the created graph. Then, the signal processing unit 13 sets the extracted portion L1 as the intrusion pattern 1.

  Similarly, when the signal processing unit 13 obtains a change in radio wave intensity and phase when a person moves along the intrusion path 2 from the receiving unit 12, the signal processing unit 13 performs signal processing on the change, and FIG. Create the graph shown in. Then, the signal processing unit 13 extracts a portion L2 corresponding to the time from when the person is exposed from the shielding object 103 along the intrusion path 2 from the position behind the shielding object 103 in the created graph. Then, the signal processing unit 13 sets the extracted portion L2 as the intrusion pattern 2.

  Next, automatic generation of a non-intrusive pattern will be described with reference to FIG. FIG. 6 is a diagram illustrating a non-intrusion pattern automatic generation process performed by the monitoring system according to the embodiment of the present invention.

  As shown in FIG. 6, first, the determination processing unit 31 in the monitoring device 30 receives a signal from the monitoring camera 20 on the condition that no signal indicating that an intruder exists is output from the radio wave sensor device 10. It is determined whether a person is shown in the video (step B1).

  If the result of the determination in step B1 is that a person is shown, the determination processing unit 31 enters a standby state. On the other hand, if the result of the determination in step B1 is that there is no person, the determination processing unit 31 notifies the radio wave sensor device 10 that there is no person in the space 101 (step S1). B2).

  Next, when step B2 is executed, in the radio wave sensor device 10, the signal processing unit 13 identifies a change in the reception state of the radio wave received by the receiving unit 12 at that time, and based on this, the non-intrusion A pattern is generated (step B3). Specifically, the signal processing unit 13 performs signal processing on the change in the reception state of the specified radio wave to create a graph (see FIGS. 5A and 5B), and does not intrude the created graph. Store as a pattern.

  And in this Embodiment, step B1-B3 is performed regularly, when there is an instruction | indication of an administrator, etc. When steps B1 to B3 are executed, the non-intrusion pattern is updated, and so-called calibration is performed.

  In general, in order to increase the detection accuracy in the radio wave sensor device 10, it is necessary to frequently update (calibrate) a non-intrusive pattern each time the location of furniture or the like arranged in the space 101 changes. This is a heavy burden on the administrator. However, according to the present embodiment, since the non-intrusion pattern can be automatically updated, the burden on the administrator can be reduced while improving the detection accuracy in the radio wave sensor device 10.

  In the present embodiment, the monitoring system 100 may include a heat ray sensor, an infrared sensor, an acoustic sensor, a magnet sensor, an impact sensor, a pressure sensor, and the like in addition to the radio wave sensor device 10 and the monitoring camera 20. In this case, the determination processing unit 31 in the monitoring device 30 can also perform calibration on these sensors when executing Step B2.

  It should be understood that the embodiment disclosed this time is illustrative in all respects and not restrictive. The scope of the present invention is defined not by the above-mentioned meaning but by the scope of claims for patent, and is intended to include all modifications within the scope and meaning equivalent to the scope of claims for patent.

  As described above, according to the present invention, it is possible to avoid erroneous intrusion detection while expanding the detection area in the monitoring system. The monitoring system of the present invention is useful for rooms in buildings such as buildings and houses, indoor parking lots, and the like.

DESCRIPTION OF SYMBOLS 10 Radio wave sensor apparatus 11 Transmission part 12 Reception part 13 Signal processing part 20 Surveillance camera 21 Imaging part 22 Optical lens 23 Image sensor 24 Image | video output part 25 Imaging direction variable mechanism 30 Monitoring apparatus 31 Determination processing part 32 Face recognition process part 40 Network 41 42 routers

Claims (7)

A monitoring system for monitoring a space to be monitored,
A radio wave sensor device, a surveillance camera, and a surveillance device;
The radio wave sensor device includes: a transmitter that transmits radio waves into the space; a receiver that receives the radio waves reflected in the space; and a signal corresponding to a change in a reception state of the received radio waves A signal processing unit that outputs to the monitoring device,
The monitoring camera includes an image sensor, and outputs an image captured by the image sensor to the monitoring device;
The monitoring device determines the presence of an intruder in the space based on the signal from the radio wave sensor device and the video from the monitoring camera.
A monitoring system characterized by that. The signal processing unit of the radio wave sensor device is
It is determined whether a change in the reception state of the radio wave received by the receiving unit matches a preset pattern, and a signal indicating that no intruder exists or an intrusion according to the determination result The monitoring system according to claim 1, wherein a signal indicating that a person is present is output to the monitoring device. The monitoring device has a function of detecting a person existing in the space based on the video from the monitoring camera, and when no person is detected in the space, there is a person in the space. A function of notifying the radio wave sensor device that the
The signal processing unit of the radio wave sensor device is
When it is notified that no person exists in the space, a change in the reception state of the received radio wave is identified, and using the identified change, a person in the space does not exist Creating the pattern,
The monitoring system according to claim 2. As the pattern, a pattern in the case where a person who exists in the space moves in a specific direction is preset,
When the change in the reception state of the radio wave received by the reception unit matches the pattern, the signal processing unit of the radio wave sensor device has an intruder moving in the specific direction. The monitoring system according to claim 2, wherein a signal to be output is output to the monitoring device. The monitoring camera includes an imaging direction variable mechanism that changes an imaging direction in response to an instruction from the monitoring device;
The monitoring device is
First, it is determined whether there is an intruder based on the signal from the radio wave sensor device.
When the imaging direction corresponding to the detected moving direction of the intruder is instructed to the monitoring camera, and an image captured in the instructed imaging direction is output,
Based on the video, determine whether the intruder is present again,
The monitoring system according to claim 4.   The monitoring system according to claim 1, wherein the monitoring device activates the monitoring camera in response to the signal from the radio wave sensor device. When the monitoring device determines that the intruder is present in the space, it performs face recognition processing on the intruder using the video from the monitoring camera, and the intruder To determine whether is a pre-registered person,
The monitoring system according to claim 1.

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