JP2005018417A - Monitoring device and monitoring method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To detect destruction at any point within almost the entire area of a window pane, without forming a conductive film on the surface of wave guide member of the window pane or the like. <P>SOLUTION: The monitoring device is provided with the wave guide member 1 of the window pane or the like which covers the opening of a building such as a window and guides light into the inside of the member with wall thickness, a light source 2 of, for instance, a semiconductor laser which conducts the light into the wave guide member, and a light detection means 3 of, for instance, a photodiode or a phototransistor which detects the light which has been guided through the wave guide member and arrived from the light source. Depending on the presence of damage of the wave guide member, the amount of the light detected by the light detection means changes. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a novel monitoring apparatus and monitoring method. Specifically, the present invention relates to a technique for reliably detecting an intrusion from an opening of a building such as a window or a door.
[0002]
[Prior art]
Recently, home invasion crimes have occurred frequently, and security concerns have increased. However, most of the security at home is based on the classic means of locking doors and windows, and in many cases it is ineffective against intrusion techniques that have been advanced by recent technologies.
[0003]
In particular, incidents of breaking glass windows and invading are increasing, and more reliable crime prevention is desired for this intrusion route.
[0004]
Countermeasures that are currently adopted for breaking and intruding the window glass include not only locking but also physical abnormalities such as vibrations to break the window glass by attaching various sensors to the window glass and window frame. In most cases, when they occur or when the window glass is opened, the sensors detect them and emit an alarm sound or make an online report to a security company.
[0005]
However, these measures do not directly detect the destruction of the window glass itself, but the reliability of abnormality detection is low, or after the window glass is broken until the alarm sounds or the security company is notified. There was a problem that there was a time difference.
[0006]
Then, what was shown by patent documents 1 as a thing which detects destruction of a window glass directly is proposed, for example.
[0007]
[Patent Document 1]
Japanese Patent Laid-Open No. 2003-128443
[Problems to be solved by the invention]
However, what is described in Patent Document 1 has a problem that a conductive film must be formed so as to cover the surface of the window glass. Therefore, there is a problem that the window glass itself is expensive. The window glass is a consumable item. The high cost of such consumables results in increased building maintenance costs.
[0009]
Moreover, in what was shown by patent document 1, unless the conduction | electrical_connection part (refer the code | symbol 16 of FIG. 1) is cut | disconnected, since a sensor does not detect abnormality, the person who is going to penetrate | inspects the window glass. If an intrusion is attempted by destroying a part other than the part, the result is that no abnormality is detected.
[0010]
Therefore, an object of the present invention is to enable detection of breakage of almost the entire region of a window glass without forming a conductive film on the surface of a waveguide member such as a window glass.
[0011]
[Means for Solving the Problems]
In order to solve the above-described problems, the monitoring device of the present invention covers the opening of a building such as a window and guides the light within the wall thickness, and a light source that introduces light into the waveguide member; And a light detecting means for detecting light from the light source that has arrived after being guided by the waveguide member, and the amount of light detected by the light detecting means varies depending on whether the waveguide member is damaged or not. Is.
[0012]
Further, in order to solve the above-described problem, the monitoring method of the present invention introduces light from a light source into a waveguide member that covers an opening of a building such as a window and guides light within a wall thickness. The light guided inside is detected by a light detection means, and the breakage of the waveguide member is detected by a change in the amount of light received by the light detection means.
[0013]
Therefore, in the present invention, it is possible to determine whether or not the waveguide member is damaged based on the amount of light received by the light detection means.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a monitoring apparatus and a monitoring method of the present invention will be described below with reference to the accompanying drawings.
[0015]
FIG. 1 shows the main components of the monitoring device.
[0016]
A light source 2 is arranged opposite to one end face 1a of the waveguide member 1 made of a transparent material such as glass or plastic. Further, the light detection means 3 is arranged opposite to another end face of the waveguide member 1, for example, the end face 1b opposite to the end face 1a. Then, the light 4 emitted from the light source 2 enters the waveguide member 1 from the end face 1a, and is received by the light detection means 3 through a predetermined path while repeating internal reflection.
[0017]
The waveguide member 1 is, for example, a window sash glass, and the material thereof may be any material that guides light of a light source to be used by internal reflection. For example, when a semiconductor laser having a wavelength of 0.4 micron or more and 2 microns or less is used as the light source 2, many plastic materials such as silica glass, polycarbonate, acrylic plastic, and the like can be used. In short, any light source can be used as long as it can guide the light of the light source to be used by internal reflection.
[0018]
Further, when a semiconductor laser is used as the light source 2, its output is not particularly limited, but is preferably 3 mW (milliwatt) or less for safety. The standard says that 1 mW or less is safe.
[0019]
The light 4 incident within the thickness of the waveguide member 1 is guided through the waveguide member while repeating internal reflection as shown in FIG. 2, but the end faces 1a, 1b, 1c, and 1d are directed to the end face. When the incident angle is smaller than the critical angle, a lot of light is transmitted through the end face. Therefore, it is preferable to form the reflecting face 5 on the end faces 1a, 1b, 1c, and 1d. Such a reflective surface 5 can be formed, for example, by applying an aluminum vapor deposition film or a dielectric multilayer film to the end surfaces 1a, 1b, 1c, and 1d. Of course, the reflective surface 5 is formed by other methods. You may do it. The formation of the reflecting surface 5 is not essential, and even when the reflecting surface is not formed, a certain amount of light is reflected by the end faces 1a, 1b, 1c, and 1d, so that the reflecting surface 5 is not formed. Although the amount of light is reduced, the light detected by the light detection means 3 is present and can be detected. As described above, when the reflection surface 5 is formed on the end surfaces 1a, 1b, 1c, and 1d, it is a matter of course that the reflection surface 5 is not formed in the portion where the light source 2 and the light detection means 3 face each other.
[0020]
As described above, a semiconductor laser is suitable as the light source 2, but a light source other than the semiconductor laser can also be used. For example, an infrared light source that emits infrared light can also be used.
[0021]
When a laser is used as light, it can be used as it is because it has excellent straightness. However, as shown in FIG. 3, the light emitted from the light source 2 by the collimator lens 6 is converted into parallel light before being guided. If it is made to enter in the wave member 1, light diffusion will be suppressed and the amount of light received by the light detection means 3 will increase.
[0022]
As the light detection means 3, for example, a photodiode, a phototransistor, or the like can be used, but of course, it is not limited to these.
[0023]
When an illegal intruder breaks a window or door and enters the room, the window glass (waveguide member) near the key or door knob 7 is broken, and the hand is unlocked by opening it. Is a common trick. Therefore, as shown in the light trace 4 in FIG. 1, if the light path is set so that the light passes through the portion close to the door knob 7, when the portion near the door knob 7 is destroyed when trying to operate the door knob 7, The light is scattered at the broken portion, and the amount of light received by the light detection means 3 is significantly reduced. The light trace 4 shown in FIG. 1 is an example, and there are several light paths from the light source 2 to the light detection means 3 even when the positional relationship between the light source 2 and the light detection means 3 is the same. Therefore, almost the entire region of the waveguide member 1 is monitored, and it is not impossible to detect it even though the waveguide member 1 is destroyed.
[0024]
Furthermore, in order to finely monitor the entire region of the waveguide member 1, it is effective to perform so-called scanning in which the angle of light incident on the waveguide member 1 is changed. Thereby, light spreads to every part of the waveguide member 1, and it becomes difficult to cause monitoring omission by this apparatus.
[0025]
Any method may be used for scanning the light incident on the waveguide member 1. For example, there are methods shown in FIGS. 4 and 5.
[0026]
That is, in the method shown in FIG. 4, the tilting mirror 8 is interposed between the light source 2 (and the collimator lens 6) and the waveguide member 1, and the tilting mirror 8 is reciprocally rotated in the direction of the arrow UD. As a result, the incident angle of the light reflected by the tilting mirror 8 with respect to the waveguide member 1 continuously changes as indicated by a two-dot chain line arrow.
[0027]
Further, in the method shown in FIG. 5, the rotating mirror 9 is interposed between the light source 2 (and the collimator lens 6) and the waveguide member 1, and the rotating mirror 9 is rotated in one direction, for example, the arrow CW direction. . A plurality of planar reflecting surfaces 9a, 9a,... Are formed so that the peripheral surface (reflecting surface) of the rotating mirror 9 is a polyhedron when viewed in the rotation axis direction. Accordingly, the reflection direction of the reflected light is continuously changed from L1 to L3 by the one flat reflection surface 9a, is continuously changed from L1 to L3 by the next flat reflection surface 9a, and so on. In addition, the continuous change in the reflection direction of the reflected light from L1 to L3 is repeated.
[0028]
As shown in FIGS. 4 and 5, when the incident angle of the incident light to the waveguide member 1 is changed, not all the light is received by the light detection means 3, but compared with a case where scanning is not performed. As a result, light is received through more paths, and a wider range of monitoring can be performed. In addition, since the light detection means 3 does not receive light continuously but intermittently, the output of the light detection means 3 is a pulse output, and therefore a predetermined pulse is output. As long as the waveguide member 1 is not destroyed. If any part of the waveguide member 1 is destroyed, light is scattered at the destroyed part, so that it is impossible to receive a certain pulse or the amount of received light is significantly reduced. The abnormality is judged by doing.
[0029]
In the above example, the movable mirror such as the tilting mirror 8 and the rotating mirror 9 is used to scan the incident light to the waveguide member 1. However, the light source 2 can be used without using the movable mirror. You may make it rock | fluctuate itself.
[0030]
As described above, when the incident angle of the incident light to the waveguide member 1 is changed, as shown in FIG. 6, a plurality of light detection means 3, 3,. That is, if the light is guided in an array along the end face 1b of the waveguide member, the guided light from more directions can be received, and the monitoring can be performed accordingly.
[0031]
By adopting the above-described configuration, if even a part of the waveguide member 1 such as a window sash glass is broken, the amount of light received by the light detecting means 3 is remarkably reduced or eliminated. Therefore, by monitoring the output corresponding to the amount of light received by the light detection means 3, it is possible to detect whether or not the waveguide member is broken. For example, when the waveguide member 1 is destroyed in advance, a decrease in the output of the light detection means 3 is obtained by an experiment or the like, an appropriate threshold is set based on the decrease, and the output of the light detection means 3 is set to the above threshold value. If the output is higher than the threshold, it is determined to be normal, and if the output is lower than the threshold, it is determined that the waveguide member is broken. The threshold value is determined so as not to be abnormal (destruction of the waveguide member 1) due to a decrease in the output of the light detection means 3 that can occur even in a normal state due to a voltage fluctuation or the like that can occur normally. Appropriate values are set so that even if there is a breakdown, even if it is a small breakdown, it is judged as abnormal.
[0032]
Next, an overview of an intrusion monitoring system using the above apparatus will be described with reference to FIG.
[0033]
First, the intrusion monitoring system is set in step S1. That is, the operation state is set. The operation state is set, for example, by turning on a predetermined setting switch installed indoors. If the setting switch can be turned on also from a portable terminal or the like, it is convenient that the setting switch can be turned on when going out, such as when the user forgets to turn on the setting switch and goes out. However, it is preferable that once the setting switch is turned on, it cannot be turned off from the portable terminal. This is because, for example, even if a person holding the mobile terminal is threatened, it cannot be turned off. In addition, since this apparatus detects destruction of the waveguide member covering the opening of the building, such as a window glass, for example, a householder cancels the operating state in order to normally enter the building. Although it is not necessary, in the unlikely event that you have forgotten the key of the entrance and you need to enter the building urgently and you have to destroy the window glass etc. It may be necessary to release the operating state in order to avoid reporting to the company. In such a case, for example, a password key input unit may be prepared outside the building so that the operating state can be canceled by inputting the password key. For easy release, it may be possible to provide a release switch outdoors. However, this may be found in an object that is intended to intrude. The installation should be considered.
[0034]
By being activated in step S1, light is emitted from the light source 2, which is received by the light detection means 3, and a circuit (not shown) that monitors the output that varies depending on the amount of light received by the light detection means 3 is provided. The operation is started, and it is determined in step S2 whether it is normal. For example, the output of the light detection means 3 is compared with the above-described threshold value, and if the output of the light detection means 3 is equal to or greater than the threshold value, it is determined as normal (YES), and the operation of step S2 is continued. For example, if the output of the light detection means 3 is less than or equal to the threshold value, it is determined as abnormal (NO), for example, an alarm sound such as a buzzer or a siren is sounded (step S3), and lighting around the building is turned on (step S4). Then, an operation for dealing with an abnormality such as contacting a predetermined contact location through the network (step S5) is performed, and the process is terminated. Note that all of the operations in steps S3 to S5 may be performed, or one or two operations may be selectively performed.
[0035]
FIG. 8 shows selectable contact locations in the case where contact is made through the network in step S5.
[0036]
When an abnormality is detected in step S3 and contact through the network in step S5 is selected, the contact means is contact via a telephone line (step S6), contact via a dedicated line with a security company (step S7), or via the Internet. Communication (step S8) is considered, and all or one or two of these are selected.
[0037]
When the connection via the telephone line in step S6 is selected, a notification that an intrusion has occurred in the mobile phone of the principal who has been selected in advance, the fixed phone of the acquaintance or the mobile phone is made (step S9). Pre-selected contacts may be contacted to all contacts, or priorities may be assigned and contacted from contacts with higher priority. You may make it contact first.
[0038]
If the contact with the security company in step S7 is selected, a notification that an intrusion has occurred in the security company is made (step S10). In the security company that has been contacted, predetermined actions such as reporting to the police and dispatch to the site are performed.
[0039]
If the Internet contact in step 8 is selected, an emergency mail notifying that an intrusion has occurred is automatically transmitted (step S11), and the mail is received by the person or acquaintance (step S12).
[0040]
In addition to the above, for example, when a local security network is established with the police, it is also possible to report to the police and the security base through the local security network. It is done.
[0041]
In the monitoring device described above, the guided light such as laser light and infrared light travels through the thickness of the waveguide member such as glass by total reflection, so that the guided light is not recognized from the outside. . Therefore, the person who tries to intrude cannot know that a device for monitoring the invasion is made on the waveguide member. Therefore, since it is not possible to take measures for passing through such monitoring in advance, it is possible to reliably detect the intrusion when an intrusion is actually attempted.
[0042]
However, for the purpose of crime prevention, it may be better to know that such a monitoring device is in operation. In such a case, as shown in FIG. 9, by applying appropriate irregularities 10, 10,... As a light leakage part to the surface 1 e of the waveguide member 1, the irregularities 10, 10,. A part of the guided light 11, 11,... Is scattered, so that some light is guided in the thickness of the waveguide member 1, and it is felt that “some device is in operation”. It is possible to make it. In this case, if the unevenness 10, 10,... Attached to the surface 1e of the waveguide member 1 has a depth equal to or greater than the wavelength of the guided light, the uneven light 10, 10. Since the parts 11, 11,... Are scattered, the object can be achieved. For example, when laser light having a wavelength of 1 micron (μm) is used as the guided light, if the concave and convex portions 10, 10,... Having a depth of 1 micron (μm) or more are attached, the concave and convex portions 10, 10,. .. Can be scattered from a part 11, 11,... Of guided light. The method of attaching the irregularities 10, 10,... Is not particularly limited. For example, the irregularities 10, 10,... Can be applied in a streak shape so that incident light to the waveguide member 1 can be scanned. For example, the scattered light 11, 11,... Moves along the lines of the irregularities 10, 10,... According to the scanning, and can more reliably recognize that “something is there”. it can. This is because a moving object is more likely to attract people's interest than a stationary object. Or, if you want to display it in a stationary state, for example, displaying characters that make you think that some security device such as “Security On” is operating also means to give up criminal acts It is effective.
[0043]
Scattering a part of the guided light from the surface of the waveguide member has the effect of preventing crimes by threatening effects, and whether the monitoring device is operating for the user of the monitoring device. It helps to confirm whether or not the monitoring device is forgotten.
[0044]
As described above, when the guided light is scattered outside, it is preferable to use conspicuous light such as red laser light.
[0045]
In the above description, it has been described that once activated, the light source 2 continues to emit light during operation. However, for example, the light source 2 may be pulse-lit for the purpose of power saving or the like. In that case, since the light detection means 3 receives the pulsed light, it is only necessary to detect whether or not there is an abnormality by detecting the pulse output accompanying the reception of the pulsed light. That is, if there is a certain pulse output, it is determined to be normal, and if there is no predetermined pulse output, it is determined to be abnormal.
[0046]
The waveguide member 1 needs to be transparent or nearly transparent in order to reduce the attenuation until the guided light reaches the light detection means 3, but the window or the like cannot be looked into the room from the outside. In some cases, it may be desired to make it opaque or close to opaque. In such a case, for example, a transparent structure is used for the waveguide member 1 for guiding light, and an opaque material such as ground glass or mirror glass is superimposed on the waveguide member 1. It is possible to cope with the problem by using it.
[0047]
According to the monitoring device and the monitoring method of the present invention described above, it is possible to reliably detect a crime that breaks the glass of a window and enters the building.
[0048]
Further, by scattering a part of the guided light from the surface of the waveguide member, it becomes a threat to those intended to intrude, and crime can be prevented in advance.
[0049]
And it can monitor with the guided light finely over the whole area of a waveguide member using the multiple reflection of guided light, and it is hard to produce a blind spot in the monitoring site | part.
[0050]
In addition, since an abnormal signal is not output unless the waveguide member is destroyed, one of the conventional proximity switches consisting of a set of two is attached to the window frame and the other to the sash, and the sash moves relative to the window frame. Unlike the monitoring device that outputs an abnormal signal when one of the proximity switches is separated from the other, there is very little possibility that the abnormal signal is erroneously output in the normal life of the householder. Therefore, if power saving is not considered, it can be always in an operating state, and forgetting to apply security can be prevented. In addition, it does not interfere with cleaning the sash.
[0051]
In addition, there is no need to provide a transparent member such as a transparent electrode on the surface of the waveguide member, for example, the window glass, and it is possible to avoid the window glass being a consumable material from becoming too expensive.
[0052]
It should be noted that the shapes and structures of the respective parts shown in the above-described embodiments are merely examples of implementations in carrying out the present invention, and these limit the technical scope of the present invention. It should not be interpreted in a general way.
[0053]
【The invention's effect】
As is apparent from the above description, the monitoring device of the present invention includes a waveguide member that covers an opening of a building such as a window and guides light within a wall thickness, and a light source that introduces light into the waveguide member. And a light detection means for detecting light from the light source that has arrived after being guided through the waveguide member, so that the amount of light detected by the light detection means varies depending on whether the waveguide member is damaged or not. It is characterized by that.
[0054]
Further, the monitoring method of the present invention introduces light from a light source into a waveguide member that covers an opening of a building such as a window and guides light within a wall thickness, and transmits the light guided in the waveguide member. It is detected by detecting means, and the breakage of the waveguide member is detected by a change in the amount of light received by the light detecting means.
[0055]
Therefore, in the present invention, it is possible to detect whether or not the waveguide member is damaged by detecting the amount of light received by the light detection means. Therefore, damage to the waveguide member can be reliably detected without processing the surface of the waveguide member. In addition, since the guided light travels from the light source to the light detection means by multiple reflection, the guided light spreads to every corner of the waveguide member, and it is possible to detect breakage of any part of the waveguide member. Furthermore, since the breakage of the waveguide member is detected, an abnormality is not detected by opening / closing of a sash or the like provided with the waveguide member, so that it is possible to always be in a monitoring state.
[0056]
In the invention described in claim 2, claim 3 and claim 8, since the incident angle of the light to the waveguide member is changed, the guided light spreads to every corner of the waveguide member. It becomes possible to monitor every corner of the waveguide member.
[0057]
In the invention described in claim 4 and claim 5, since the plurality of light detecting means are arranged in an array along the direction in which the angle of the guided light changes, the guided light that has passed through more paths can be obtained. Since light can be received, it is possible to monitor every corner of the waveguide member.
[0058]
In the invention described in claim 6 and claim 9, since a part of the light incident on the waveguide member is leaked from a part of the surface of the waveguide member, it becomes a threat to those intended to intrude. , Crime prevention effect.
[Brief description of the drawings]
FIG. 1 shows an embodiment of a monitoring apparatus and a monitoring method of the present invention, and this figure is an explanatory diagram showing an outline of the configuration.
FIG. 2 is a diagram showing how light is guided in the thickness direction of a waveguide member.
FIG. 3 is an explanatory diagram illustrating a configuration example of a light source unit.
FIG. 4 is an explanatory diagram showing another configuration example of the light source unit.
FIG. 5 is an explanatory diagram showing still another configuration example of the light source unit.
FIG. 6 is an explanatory view showing a modification of the light detection means.
FIG. 7 is a flowchart illustrating an example of an intrusion monitoring system.
FIG. 8 is a flowchart showing a specific example of communication through a network.
FIG. 9 is a schematic cross-sectional view showing an example in which a part of light guided in the waveguide member is leaked from the surface of the waveguide member.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Waveguide member, 2 ... Light source, 3 ... Light detection means, 4 ... Light, 8 ... Tilt mirror (movable mirror), 9 ... Rotation mirror (movable mirror), 10 ... Concavity and convexity (light leakage part), 11 ... Light leakage

Claims (9)

A waveguide member that covers an opening of a building such as a window and guides light within a wall thickness; a light source that introduces light into the waveguide member; and light from the light source that arrives after being guided through the waveguide member And a light detection means for detecting
A monitoring apparatus characterized in that the amount of light detected by the light detection means changes depending on whether the waveguide member is broken or not. Provide a movable mirror that reflects the light from the light source,
2. The monitoring apparatus according to claim 1, wherein an incident angle of light from the light source to the waveguide member is changed by driving the movable mirror. Configure the light source to swing freely,
2. The monitoring apparatus according to claim 1, wherein an incident angle of light from the light source to the waveguide member is changed by swinging the light source. The monitoring device according to claim 2, wherein the plurality of light detection means are arranged in an array along a direction in which the angle of the guided light changes. 4. The monitoring apparatus according to claim 3, wherein the plurality of light detection means are arranged in an array along a direction in which the angle of the guided light changes. The monitoring device according to claim 1, wherein a light leakage part for leaking a part of light guided in the thickness of the waveguide member is provided on a part of the surface of the waveguide member. Light is introduced from a light source to a waveguide member that covers the opening of a building such as a window and guides light within the wall thickness,
The light guided in the waveguide member is detected by light detection means,
A monitoring method, wherein breakage of the waveguide member is detected by a change in the amount of light received by the light detection means. The monitoring method according to claim 7, wherein an incident angle of the light to the waveguide member is changed. The monitoring method according to claim 7, wherein a part of the light incident on the waveguide member is leaked from a part of the surface of the waveguide member.

Images