CN102867385B - Building security system and building security method based on pulse light spot array pattern change detection - Google Patents
Building security system and building security method based on pulse light spot array pattern change detection Download PDFInfo
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- CN102867385B CN102867385B CN201210364668.5A CN201210364668A CN102867385B CN 102867385 B CN102867385 B CN 102867385B CN 201210364668 A CN201210364668 A CN 201210364668A CN 102867385 B CN102867385 B CN 102867385B
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Abstract
The invention provides a building security system and a building security method based on pulse light spot array pattern change detection. The building security system comprises a camera, a mainframe, a warning device and a light source, the light source gives out dot matrix rays by a pulse irradiation method, the dot matrix rays irradiate on a detection area to form a light spot array, a sensor for detecting the light spot array is arranged in the camera, and a grating used for adjusting shape of the light spot array and number of light spots is further arranged in front of the light source. Real-timeness and improved efficiency of detection can be achieved by adjusting the light spots and parameters of an image sensor, the building security is easy to implement and low in cost, and has a great application prospect. The building security method is capable of realizing intrusion detection within a variable range by changing the number of the light spots, light spot array pattern and position of the light source for changing detection range.
Description
Technical field
The invention belongs to building technical field of security and protection, relate to the detection of safety-protection system to foreign object invasion, particularly a kind of real-time variation detects based on pulse hot spot system of battle formations sample building safety-protection system and safety protection method.
Background technology
Along with the raising of people's living standard and the increase of security precautions, the application of safety-protection system is more and more extensive.At present, the technological means adopting in safety-protection system mainly contains: the guard technology based on traditional sensors (infrared, Men Ci etc.), guard technology based on bio-identification and the guard technology based on video monitoring, wherein, traditional sensors function is relatively simple, conventionally be arranged on gateway, need passive triggering to report to the police, once yet grasp the triggering feature of this sensor, avoid this defence line, road, so such guard system has just performed practically no function, and such guard system is often subject to the interference of some non-burglar's moving objects, and False Rate is higher.And guard technology based on biological identification needs passive triggering equally, be only applicable to access control, have equally and the similar problem of the guard technology based on traditional sensors.
At present, the video monitoring product that has many guard technologies based on video monitoring to make, this class monitoring product is host node mainly with PC, adopt video camera uninterrupted monitoring in 24 hours, the screen video recording at recording and storing scene, or by special staff by monitor scope to note abnormalities event.Can only play simple video recording function like this, very high to the hard-disk capacity requirement of PC, need to be equipped with special messenger's monitoring video simultaneously, make the cost price of whole system high.And this type of video monitoring product only rests on record toward contact and preserve on video image, in these massive video data, do not carry out real-time, intelligent processing method.
For general security protection video monitoring product, have following several large principle to observe: the one, extremely low loss and false drop rate do not allow to make mistakes in extreme scenes.The 2nd, the antijamming capability of equipment is strong, comprises the non-artificial factor existing in environment, as the variation of sound, light, temperature; Also comprise the destruction that some are artificial, as wireless telecommunication shielding, power supply are cut off, artificial covering etc. simultaneously.The 3rd, for the scene of extensively deploying troops on garrison duty and deploying troops on garrison duty temporarily, cost of products need to have certain control.The 4th, deploying troops on garrison duty should not be too complicated.The 5th, safety-protection system need to have certain disguise.
All is flase drop and undetected problem to the greatest problem that video carries out analyzing and processing and the monitoring product that judges faces.In safety-security area, undetected meeting causes great potential safety hazard, and undetected existence is belonged to zero tolerance; And flase drop can cause unnecessary personnel's equipment to transfer, wasting manpower and material resources.Therefore this type systematic is being born the task of simultaneously reducing false drop rate and loss, and this is a great difficult point to analyzing recognizer and system constructing.
Summary of the invention
The present invention is intended at least solve the technical matters existing in prior art, has proposed to special innovation a kind of building safety-protection system and safety protection method detecting that change based on pulse hot spot system of battle formations sample.
In order to realize above-mentioned purpose of the present invention, according to an aspect of the present invention, the invention provides a kind of building safety-protection system detecting that changes based on pulse hot spot system of battle formations sample, it comprises that the visual field covers the camera of surveyed area, be connected with described camera, for the main frame that described camera photographic images is processed, be connected with described main frame, the warning device of reporting to the police when having foreign object invasion and the light of transmitting cover the light source of described surveyed area, the position of described camera and described light source is adjustable, described light source adopts pulse irradiation mode to send dot matrix light, described dot matrix light is irradiated to and on described surveyed area, forms hot spot matrix, in described camera, be provided with the sensor that detects described hot spot matrix, before described light source, be also provided with for regulating the grating of described hot spot matrix shape and number of spots.
Building safety-protection system of the present invention can bring by adjusting the parameter of hot spot and imageing sensor the lifting that detects real-time and efficiency, than being easier to, realizes, and cost is low, has great application prospect.
In a preferred embodiment of the present invention, the distance of described camera and described light source is 10cm-20cm.
In another kind of preferred embodiment of the present invention, the spot densities on described surveyed area is 100/m
2-400/m
2.
Building safety-protection system of the present invention can change sensing range by change number of spots, Spot Moment system of battle formations sample and light source position, has the ability of carrying out intrusion detection in variable range.
In order to realize above-mentioned purpose of the present invention, according to another aspect of the present invention, the invention provides a kind of building safety protection method detecting that changes based on pulse hot spot system of battle formations sample, it comprises the steps:
S1: build the building safety-protection system detecting that changes based on pulse hot spot system of battle formations sample claimed in claim 1;
S2: the hot spot matrix image to surveyed area carries out initialization, obtains initial pictures hot spot coordinate;
S3: described camera is taken and passed the image photographing back main frame;
S4: described main frame is taken according to camera the image obtaining and extracted hot spot coordinate and compare with initial pictures hot spot coordinate, has judged whether foreign object invasion, if there is foreign object invasion, reports to the police, if there is no foreign object invasion, returns to step S3 and continues to detect.
Building safety protection method of the present invention changes sensing range by change number of spots, Spot Moment system of battle formations sample and light source position, have the ability of carrying out intrusion detection in variable range, the present invention can bring by adjusting the parameter of hot spot and imageing sensor the lifting that detects real-time and efficiency.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage accompanying drawing below combination obviously and is easily understood becoming the description of embodiment, wherein:
Fig. 1 the present invention is based on the system chart that pulse hot spot system of battle formations sample changes the building safety-protection system detecting;
Fig. 2 is that spot densities of the present invention changes schematic diagram;
Fig. 3 is light source of the present invention and the schematic diagram of camera spacing on spot displacement impact;
Fig. 4 utilizes building safety protection method of the present invention to carry out the schematic diagram of foreign object intrusion detection.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, term " longitudinally ", " laterally ", " on ", orientation or the position relationship of the indication such as D score, 'fornt', 'back', " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward " be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, rather than indicate or imply that the device of indication or element must have specific orientation, with specific orientation, construct and operation, therefore can not be interpreted as limitation of the present invention.
In description of the invention, unless otherwise prescribed and limit, it should be noted that, term " installation ", " being connected ", " connection " should be interpreted broadly, for example, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be to be directly connected, and also can indirectly be connected by intermediary, for the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term.
The invention provides a kind of building safety-protection system detecting that changes based on pulse hot spot system of battle formations sample, as shown in Figure 1, this building safety-protection system comprises that the visual field covers the camera of surveyed area, also comprise with this camera be connected, the main frame for camera photographic images is processed, and be connected with main frame, when there being the light of warning device that foreign object when invasion report to the police and transmitting to cover the light source of surveyed area.Wherein, the position of this camera and light source is adjustable, light source adopts pulse irradiation mode to send dot matrix light, dot matrix light is irradiated to and on surveyed area, forms hot spot matrix, in camera, be provided with and can detect the imageing sensor that hot spot matrix changes, before light source, be also provided with for regulating the grating of hot spot matrix shape and number of spots.
In the present embodiment, the position of light source to be set with respect to camera position, in order conveniently deploying troops on garrison duty, camera and light source to be placed side by side, only retain certain spacing.In a kind of preferred implementation of the present invention, the distance range of camera and light source is 10cm-20cm, and the distance that increases as far as possible camera and light source in the satisfiable situation of equipment packages is conducive to improve the spot displacement amplitude observing.In a kind of embodiment being more preferably of the present invention, the distance of camera and light source is 10cm.
In the present embodiment, it is the near-infrared light source of 850nm that light source adopts the wavelength that emits beam, human eye cannot observe the hot spot matrix irradiating, light source itself can observe as faint red point, infrared light can be observed by sensor preferably, and can not discovered by human eye, guaranteed the disguise of system; By modulation of source, be pulse irradiation mode simultaneously, light-pulse generator can be different from the interference of most of same frequency light of environment, as the electric light in indoor environment itself, and irradiation enters indoor sunburst, before and after using, the mode of frame difference can reduce the constant light in environment, the flicker frequency of light source need to be synchronizeed with the sample frequency of sensor, the break-make of the signal controlling light source power that native system use sensor provides, and inner light source of every two field picture time shutter of strict guarantee is bright dark stable.
As shown in Figure 2, the present invention is based on and continue to observe the displacement that is irradiated to hot spot in the Spot Moment system of battle formations sample on surveyed area to detect foreign object invasion, the building safety protection method that variation detects based on pulse hot spot system of battle formations sample of the present invention comprises the steps:
S1: build the building safety-protection system detecting that changes based on pulse hot spot system of battle formations sample of the present invention;
S2: the hot spot matrix image to surveyed area carries out initialization, obtains initial pictures hot spot coordinate;
S3: camera is taken and passed the image photographing back main frame;
S4: main frame is taken according to camera the image obtaining and extracted hot spot coordinate and compare with initial pictures hot spot coordinate, has judged whether foreign object invasion, if there is foreign object invasion, reports to the police, if there is no foreign object invasion, returns to step S3 and continues to detect.
While utilizing building safety-protection system of the present invention to carry out security protection, concrete step is:
The first step: build the building safety-protection system detecting that changes based on pulse hot spot system of battle formations sample of the present invention.
Second step: the hot spot matrix image to surveyed area carries out initialization, obtains initial pictures hot spot coordinate.In the present embodiment, the hot spot matrix image of surveyed area is carried out to initialization and comprise density and the adjustment hot spot Matrix Pattern of adjusting the distance of camera and light source, the size of adjusting hot spot, adjustment hot spot.
In the present invention, in order not there is not undetected and situation false retrieval, hot spot need to meet two conditions, and the one, spot densities meets the demands, and in unit area, needing has abundant hot spot, while guaranteeing foreign object invasion there is displacement in abundant hot spot, if only there is only a few hot spot to have shake, be likely due to unstable the causing in environment, as vibration and atmospheric density non-uniform temperature etc., in the present embodiment, the spot densities on surveyed area is 100/m
2-400/m
2, in the situation that light source power is enough, should improve as far as possible spot densities.In a kind of embodiment being more preferably of the present invention, spot densities is 100-225/m
2.The 2nd, spot displacement distance, foreign object single hot spot of when invasion need to have enough displacements, under the limited condition of sensor accuracy, can detect displacement.As can be seen from Fig. 3, along with light source and sensor move closer to, sensor is equivalent to leave for observation surveyed area along source light direction, even if cause having foreign object invasion, the hot spot observing is still not very large displacement on imaging plane, thereby cause thrashing, therefore, for avoiding undetected situation to occur, need to adjust the distance of camera and light source, make the displacement of foreign object when invasion hot spot enough large, in the present embodiment, the distance of camera and described light source is 10cm.
Simultaneously, on surveyed area, hot spot is unsuitable excessive, otherwise can cause energy to disperse, a little less than the hot spot that sensor observes is too dark, even in fine situation, by daylight, covered dimension, in the present embodiment, according to the sensitivity of sensor, the spot size of light source is regulated, make sensor the energy of hot spot on surveyed area be detected and be greater than its detection threshold, avoid the generation of undetected situation.
In addition, by adjusting the grating before light source, changing grating focuses on and the scattering degree to hot spot, adjust number and the hot spot Matrix Pattern of light source hot spot, in the present embodiment, hot spot spacing is unsuitable excessive, with 2-3/20cm, be advisable, as shown in Figure 2, at least to guarantee that the various sides of human body have abundant hot spot to be irradiated on human body while presenting to camera, in the present embodiment, sensor accuracy requires on image, to show as 5-10 hot spot when having foreign object invasion and is subjected to displacement, it should be noted that, present embodiment is to detect artificial object, when detecting target difference, need be to number of spots, the geometric parameters such as hot spot Matrix Pattern adjust accordingly, the number of spots being irradiated in inspected object of take meets the demands as target.
According to above step, the initial pattern of hot spot matrix while having obtained invading without foreign object, obtains the center-of-mass coordinate of hot spot by operations such as dilation erosion thresholding clusters.Wherein hot spot shows as the solid circles speck of certain physical dimension in image, and the center-of-mass coordinate after extraction is only a point on image, respectively as shown in Fig. 4 (a) and Fig. 4 (b).
The 3rd step: camera remains that shooting state is taken and passes the image photographing back main frame.
The 4th step: main frame is taken according to camera the image obtaining and extracted hot spot coordinate and compare with initial pictures hot spot coordinate, has judged whether foreign object invasion, if there is foreign object invasion, reports to the police, if there is no foreign object invasion, returns to the 3rd step and continues to detect.The method that specifically judges whether foreign object invasion is: from taking the image obtaining, extract facula mass center coordinate and compare with initial pictures hot spot coordinate, if the hot spot coordinate that camera is taken on the image obtaining is subjected to displacement with respect to initial pictures hot spot coordinate, simultaneous displacement hot spot meets some and condition of connectedness indicates foreign object invasion.In the present embodiment, displacement number of spots be no less than 3 and the convex polygon that surrounded by displacement hot spot inner not during displacement hot spot, indicates that foreign object invades.
In a preferred embodiment of the invention, as shown in Figure 4, when building safety protection method according to the present invention carries out security protection, first as required the region division camera position detecting, with respect to camera position, light source position is set, the size of light source hot spot is set simultaneously, density and Spot Moment system of battle formations sample, obtain the original infrared image as shown in Fig. 4 (a), study through certain frame number image, obtain initial pictures hot spot coordinate, and record, as shown in Fig. 4 (b), wherein, Fig. 4 (b) the first half is original infrared image, the image of the latter half for obtaining through study aftertreatment, brighter rectangle represents stable and stronger hot spot, suitable to spot displacement discrimination standard, that is the stable lattice diagram obtaining in learning process, the hot spot of soft dot for immediately observing, owing to having adopted different thresholdings, to hot spot brightness settings high threshold and low threshold value, the hot spot of figure hollow core round dot for using high threshold to extract, the hot spot of black circle for extracting under lower threshold value, soft dot will be less than black circle.
Then, camera keeps shooting state, and normally, without in foreign object invasion situation, soft dot hot spot place must can observe black circle, but black circle may not have soft dot with correspondence.At a time take and obtain the image in Fig. 4 (c), the hot spot coordinate of the image shown in Fig. 4 (c) is compared with initial pictures hot spot coordinate, can see that the hot spot coordinate in Fig. 4 (c), with respect to the hot spot coordinate in the initial pictures of Fig. 4 (b), displacement has occurred, through differentiating, if the quantity of displacement hot spot is connective and the lasting frame number system of satisfying condition provides foreign object intrusion alarm, in the present embodiment, in the situation that frame per second is 30fps, continuous 10 frames have detected spot displacement, have foreign object invasion.
Building safety protection method of the present invention changes sensing range by change number of spots, Spot Moment system of battle formations sample and light source position, have the ability of carrying out intrusion detection in variable range, the present invention can bring by adjusting the parameter of hot spot and imageing sensor the lifting that detects real-time and efficiency.
In the description of this instructions, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: in the situation that not departing from principle of the present invention and aim, can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is limited by claim and equivalent thereof.
Claims (2)
1. the building safety-protection system change detecting based on pulse hot spot system of battle formations sample, it is characterized in that, comprise that the visual field covers the camera of surveyed area, be connected with described camera, for the main frame that described camera photographic images is processed, be connected with described main frame, the warning device of reporting to the police when having foreign object invasion and the light of transmitting cover the light source of described surveyed area, described light source is that wavelength of light is the near-infrared light source of 850nm, described light source adopts pulse irradiation mode, the position of described camera and described light source is adjustable, described light source adopts pulse irradiation mode to send dot matrix light, described dot matrix light is irradiated to and on described surveyed area, forms hot spot matrix, in described camera, be provided with the imageing sensor that detects described hot spot matrix, the accuracy requirement of described sensor shows as 5-10 hot spot on image and is subjected to displacement when having foreign object invasion, before described light source, be also provided with for regulating the grating of described hot spot matrix shape and number of spots, wherein, the distance range of described camera and described light source is 10cm-20cm, spot densities on described surveyed area is 100/m
2-400/m
2.
2. based on pulse hot spot system of battle formations sample, change the building safety protection method detecting, it is characterized in that, comprise the steps:
S1: build the building safety-protection system detecting that changes based on pulse hot spot system of battle formations sample claimed in claim 1;
S2: the hot spot matrix image to surveyed area carries out initialization, obtain initial pictures hot spot coordinate, wherein, the hot spot matrix image of surveyed area is carried out to initialization and comprise density and the adjustment hot spot matrix image of adjusting the distance of camera and light source, the size of adjusting hot spot, adjustment hot spot, wherein, the density of the hot spot on described surveyed area is 100-225/m
2, the distance of described camera and described light source is 10cm, described adjustment hot spot matrix image comprises the grating of adjusting before light source, changing grating focuses on and the scattering degree to hot spot, to adjust number and the hot spot matrix image of light source hot spot, wherein, hot spot spacing is 2-3/20cm;
S3: described camera is taken and passed the image photographing back main frame;
S4: described main frame is taken according to camera the image obtaining and extracted hot spot coordinate and compare with initial pictures hot spot coordinate, judged whether foreign object invasion, if there is foreign object invasion, report to the police, if there is no foreign object invasion, returning to step S3 continues to detect, wherein, the described method that judges whether that foreign object is invaded is: if the hot spot coordinate that camera is taken on the image obtaining is subjected to displacement with respect to initial pictures hot spot coordinate, the quantity of simultaneous displacement hot spot is no less than 3 and the inner not displacement hot spot not of the convex polygon that surrounded by described displacement hot spot, indicate foreign object invasion.
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| CN102930682A (en) * | 2012-10-09 | 2013-02-13 | 清华大学 | Intrusion detection method based on displacement of light spot patterns |
| CN108564748B (en) * | 2018-07-06 | 2023-10-31 | 长春工程学院 | Anti-theft alarm system for transformer |
| CN110969140A (en) * | 2019-12-12 | 2020-04-07 | 广东安居宝智能控制系统有限公司 | Anti-smashing control method and device for barrier gate |
| CN110996074B (en) * | 2020-01-04 | 2021-03-16 | 盛广济 | Method for monitoring burst partition of curtain wall glass |
| CN111310576B (en) * | 2020-01-17 | 2023-07-14 | 厦门熵基科技有限公司 | Channel target passing detection method, device and equipment |
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| EP1528411A1 (en) * | 2003-10-27 | 2005-05-04 | Bea S.A. | Distance measurement sensor |
| CN101536051A (en) * | 2006-09-28 | 2009-09-16 | B.E.A.有限公司 | Sensor for presence detection |
| FR2942062A1 (en) * | 2009-02-12 | 2010-08-13 | Shaktiware | System for detecting or video monitoring presence and displacement of e.g. human, has scanning module oriented with respect to imager such that ray source and monitoring device are pointed in direction corresponding to part of image |
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| JP2011169701A (en) * | 2010-02-17 | 2011-09-01 | Sanyo Electric Co Ltd | Object detection device and information acquisition apparatus |
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| EP1528411A1 (en) * | 2003-10-27 | 2005-05-04 | Bea S.A. | Distance measurement sensor |
| CN101536051A (en) * | 2006-09-28 | 2009-09-16 | B.E.A.有限公司 | Sensor for presence detection |
| FR2942062A1 (en) * | 2009-02-12 | 2010-08-13 | Shaktiware | System for detecting or video monitoring presence and displacement of e.g. human, has scanning module oriented with respect to imager such that ray source and monitoring device are pointed in direction corresponding to part of image |
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