CN111163246A - High-altitude falling object monitoring system - Google Patents
High-altitude falling object monitoring system Download PDFInfo
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- CN111163246A CN111163246A CN201811325619.4A CN201811325619A CN111163246A CN 111163246 A CN111163246 A CN 111163246A CN 201811325619 A CN201811325619 A CN 201811325619A CN 111163246 A CN111163246 A CN 111163246A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
- F16M11/06—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/90—Arrangement of cameras or camera modules, e.g. multiple cameras in TV studios or sports stadiums
Abstract
The invention provides a high-altitude falling object monitoring system, which comprises: the supporting mechanism comprises a base and an arm rod connected to the base, and the arm rod and the base are arranged in an angle; the camera devices are arranged on the arm rod at intervals along the length direction of the arm rod; the control box is arranged on the supporting mechanism, a video analysis host is arranged in the control box and is in communication connection with each camera device; and the video analysis host is used for storing the video information and sending alarm information to an external mobile terminal. According to the embodiment of the invention, the main control module is connected with the communication camera device, so that the automatic capture of the falling object can be realized. Therefore, the reliability and quality of monitoring can be greatly improved, human errors are reduced, and the detection efficiency of high-altitude falling cases is improved.
Description
Technical Field
The invention relates to the field of security monitoring, in particular to a high-altitude falling object monitoring system.
Background
The development layout of hardware in the video monitoring technology for the high-altitude falling object is multifunctional, besides video acquisition, additional tracking capability is also popularized, but the method is only limited to displacement tracking by using different detectors, errors or omissions often occur, and the processing capability of a chip is not good enough; the full-time monitoring of the scene requires the full-time current value monitoring of monitoring personnel, and the requirement on the concentration of the personnel is high; in view of the danger severity of the casualties and property losses caused by falling objects thrown from high altitude and the difficulty of pursuing responsibility, an effective novel intelligent monitoring method and an effective novel intelligent monitoring system are required to effectively capture and rapidly collect the evidence, and the effects of deterrence and deterrence can be achieved by adding propaganda work after installation.
In actual use of the existing monitoring system, the background of a scene building is complex, the camera device is installed downwards and is popularized, background interference caused by large change of shade and darkness of the scene in outdoor sunny days and low illumination at night, movement interference of flying birds or sundries blown by wind, and interference of swinging objects in any monitoring range on the monitoring effect. It is therefore necessary to incorporate an intelligent monitoring system to enhance the filtering of these interfering factors so that the system can reliably detect and track high altitude projectiles. The intelligent monitoring system is a real-time monitoring system, requires high accuracy and real-time tracking, and utilizes a visual tracking principle and uses a high-performance computer to process video hard disk storage, complex background removal and comparison of a large number of continuous video frames, detection of a plurality of moving bodies, tracking of the plurality of moving bodies, judgment of tracks of the plurality of moving bodies and automatic multi-path alarm sending work for finding high-altitude falling objects.
In an intelligent monitoring system, a scene video monitoring network with basic functions consisting of a proper amount of high-definition and high-speed camera devices and a bracket, a real-time intelligent dynamic analysis computer and an alarm receiving mobile terminal form a high-efficiency, reliable and accurate all-weather real-time monitoring system to assist effective evidence collection, which is very expected by an integrated device for security and public health maintenance.
Disclosure of Invention
In order to solve the above technical problem, the present invention provides a high altitude dropping object monitoring system for monitoring a dropping object dropped from a building, comprising:
the supporting mechanism comprises a base and an arm rod connected to the base, and the arm rod and the base are arranged at an angle;
the camera devices are arranged on the arm rod at intervals along the length direction of the arm rod;
the control box is installed on a base of the supporting mechanism, a video analysis host is installed in the control box and is in communication connection with each camera device, and the video analysis host is also provided with a communication module for connecting a display screen output port and external equipment and is used for setting, maintaining and reading video data.
Compared with the prior art, the high-altitude falling object monitoring system provided by the invention utilizes the main control module to control the camera device, and can realize automatic capture of falling objects. Therefore, the monitoring quality can be greatly improved, the human error is reduced, and the detection efficiency of the case falling from high altitude is improved.
Optionally, the control box is mounted on the base.
Alternatively, each camera is disposed obliquely upward, and the elevation angle of each camera is between 20 ° and 45 °. The elevation angle of the camera device is 20-45 degrees, so that a better monitoring scene can be shot, the monitored scene can be completely covered by using enough camera devices, and a better evidence obtaining effect is obtained. Optionally, the camera device may use a PTZ network camera device, which facilitates adjustment of different operating parameters of the camera device in the video management module.
In addition, optionally, the support mechanism further comprises a pole disposed on the ground around the building monitored by the high-altitude falling object monitoring system, and the base is mounted at the top end of the pole at a sufficient height. The high-altitude falling object monitoring system arranged on the pole is less interfered by artificial disturbance, sundries blown from the ground, illumination light rays such as a street lamp and the like, so that the high-altitude falling object monitoring system has a better monitoring effect.
Further, optionally, the pole and the base are connected through a manual or electric rotatable rotating bearing, the orientation of the pole can be conveniently adjusted, the pole is provided with a hinge position rotatable descending arm lever and a control box, and the camera device and the video analysis host can be conveniently maintained and replaced and the evidence can be conveniently collected to read and store information so as to reduce corresponding high-altitude work. Further, the orientation of the arm may be adjusted by adjusting the direction of the swivel bearing.
Further optionally, the system is mounted on a canopy of a building. The high-altitude falling object throwing monitoring system arranged on the awning eaves awning is convenient to install and wire-arrange except that the system does not occupy the extra space on the ground and does not obstruct pedestrians. Meanwhile, the falling object monitoring system is difficult to contact by the idle and miscellaneous people and the like, so that the intentional damage to the falling object monitoring system can be reduced, and the service life is further prolonged.
In addition, optionally, if the installation position of the monitoring scene is proper, a lighting lamp can be arranged on the supporting arm rod for lighting at night.
In addition, optionally, the high-altitude falling object monitoring system further comprises a display device mounted on the supporting rod mechanism;
the display device is in communication connection with the video analysis host. The display device can play the monitoring picture of the camera device in real time, thereby playing a deterrent role on building users around the monitoring scene and putting an end to the lucky psychology of the parabolas. In addition, the display device can be used for playing related propaganda materials by dividing the window, and further playing case and criminal legal content to play the roles of propaganda, precaution and supervision. In addition, the display device also displays working parameters, stored data and a real-time monitoring video interface of the high-altitude falling object monitoring system.
In addition, optionally, a plurality of camera devices can be used to capture the point of the object throwing, and limited by the installation position and considering the problem of installation elevation angle, so that the floor partition monitoring of the monitoring range is divided, and the floor partition monitoring is divided into high, middle and low partition monitoring to obtain the optimal shooting angle.
Drawings
FIG. 1 is a schematic view of a high altitude projectile monitoring system of the present invention installed on the ground;
FIG. 2 is a schematic view of a scene of the high altitude projectile monitoring system of the present invention;
FIG. 3 is a block diagram of a high altitude drop monitoring system of the present invention;
FIG. 4 is a schematic structural view of the high-altitude drop monitoring system of the present invention installed on a canopy.
Figure 5 is a schematic diagram of a high-altitude projectile monitoring device of the present invention mounted on a top layer of large scale .
FIG. 6 is a schematic view of a surveillance zone of a surveillance camera device mounted on the ground of the high-altitude projectile monitoring system of the present invention.
FIG. 7 is a schematic view of a monitoring section of a monitoring camera device installed on the top of a building of the high-altitude falling object monitoring system.
Description of reference numerals:
the system comprises a base 1, an arm rod 2, a column rod 3, a camera device 4 and a control box 5.
Detailed Description
Implementation mode one
A first embodiment of the present invention provides a high altitude drop monitoring system for monitoring a drop thrown from a building, as shown in fig. 1, comprising:
the supporting mechanism comprises a base 1 and an arm rod 2 connected to the base 1, and the arm rod 2 and the base 1 are arranged at an angle;
a plurality of imaging devices 4, the imaging devices 4 being provided at intervals on the arm lever 2 along the longitudinal direction of the arm lever 2;
the high-altitude falling object monitoring system further comprises a control box 5, the control box 5 is installed on the supporting mechanism, a video analysis host is installed in the control box 5 and is in communication connection with the camera devices 4; the control module is also provided with a display screen output port and an external device connecting communication module, and is used for installing initial setting, maintaining, collecting evidence and reading video data. .
The camera 4 in this embodiment is used to obtain video information of a monitoring scene, the monitoring scene may be an outer wall of a building in general, the camera 4 may be disposed on the ground outside the appropriate distance around the building, and the fixed positions on the arm lever 2 are installed at intervals, the arm lever 2 is installed on the base 1, and the base 1 is installed on the post 3. Of course, the camera 4 may be mounted on an opposite building to obtain a frontal view, or even mounted on the top floor of the building, extended and looking down for a photograph.
Taking the high-altitude falling object monitoring system installed on the ground as an example, each camera 4 is arranged obliquely upward, and the elevation angle of each camera 4 can be 45 ° to 80 °. The elevation angle of the camera 4 is 45-80 degrees, so that the angle of a better monitoring scene surface can be captured, and effective evidence is provided. In the present embodiment, as shown in fig. 2, a plurality of high-altitude falling object monitoring systems arranged at intervals can divide the whole building into a closed-loop monitoring system in all directions, thereby preventing the occurrence of monitoring dead corners. Of course, when the system is used, the number and the positions of the high-altitude falling object monitoring systems can be set according to the requirements of the monitoring scene area.
The imaging device 4 may be a common (25 fps) or high-speed (60 fps) imaging device, and may be installed in a suitable number and fixed manner to vertically divide the scene into sections for monitoring, and completely cover the monitored scene by means of a common fixed-focus fixed angle or PTZ (pan/tilt and zoom) control.
Preferably, the support mechanism of the present invention further comprises a mast 3, the mast 3 being disposed on the ground in the vicinity of a building monitored by the high altitude drop monitoring system, the base 1 being mounted at the top end of the mast 3. In the time of in-service use, camera device 4 far away from base 1 can be used for the picture of the biggest elevation angle of control, be fit for being responsible for the higher layers of control, be close to the picture of camera device 4 utensil middle elevation angle in the middle of the centre, be fit for monitoring middle floor, camera device 4 near base 1 can be used for the picture of the minimum elevation angle of control, be fit for being responsible for the lower layers of control, this kind of setting makes control picture edge overlap, when the error appears in the control shooting analysis of the highest floor, the object that falls will certainly be respectively in proper order through the monitoring range on well and low floor, so this monitoring analysis has reproducibility, thereby the reliability of high altitude object falling monitoring system has been improved, prevent to calculate and miss live. FIG. 6 is a schematic view of a surveillance zone of a surveillance camera unit of the high-altitude projectile monitoring system of the present invention mounted on the ground in an upward orientation.
In the embodiment, the post rod 3 is connected with the base 1 through the rotary bearing, and the flange of the base 1 is arranged on the rotary bearing and then connected with the post rod 3, so that the maintenance and the angle adjustment are convenient. The rotary bearing is convenient to connect, install and disassemble, and the convenience for installing and maintaining the high-altitude falling object monitoring system is improved. Further, the orientation of the mast can be adjusted by adjusting the direction of the swivel bearing. The external connection module of the video analysis host in the control box 5 can extend to be arranged on the sub-control box on the hinge position in the 3 columns of the post rod, so that the installation and the maintenance inspection or the adjustment are convenient to set.
Of course, in order to further improve the adaptability of the high-altitude falling object monitoring system, the height of the adjustable post rod 3 can be utilized, and the angle of the arm rod 2 relative to the post rod 3 can be adjusted in real time by utilizing motor drive or manual bearing rotation. The arm may also be flange-mounted in a sectional type to be flexibly lengthened or shortened according to a monitoring range to obtain an optimal photographing angle.
Based on the structure, the invention also discloses the operation principle of the high-altitude falling object monitoring system. As shown in fig. 3, the high-altitude falling object monitoring system includes the following components:
the video acquisition device, namely the plurality of camera devices 4 and the video management module, is used for acquiring video information of a monitored scene; these cameras 4 are collectively connected to a video analysis host in the control box 5, and collect scene video information.
And the video analysis module is used for analyzing the real-time video information shot by the camera device 4 and processed by the video management module, tracking each moving object after subtracting the background from the continuous video frames of the video, judging whether the moving object is a high-altitude falling object or not, and sending alarm information to an external mobile terminal if the moving object is judged to be the high-altitude falling object, wherein the information comprises the falling time of the high-altitude falling object and the position of the monitoring camera device. The video information and the alarm information content acquired by the video acquisition device may also be stored in the memory.
The video analysis host may be a computer, and in particular may be a small scale cluster of high performance computers. The real-time calculation efficiency for judging the falling object can be obviously improved by utilizing a computer with higher performance.
The plurality of camera devices 4 can be connected with the video analysis module through an intranet, or can be connected with the internet, and the intranet transmits videos to the high-performance adaptive computing host in real time through a data switch or a router or wireless transmission to process the real-time videos. Due to the fact that the connection speed of the intranet is higher, video information can be transmitted faster, and therefore the method is more suitable for application scenes analyzed in real time.
The external mobile terminal may be a smartphone, a tablet computer, a portable computer, etc. that security personnel carry with them, such as a mobile terminal that may be generally an android or IOS platform. After the multi-channel alarm information sent through an intranet or the internet arrives at a designated android or IOS platform mobile terminal, security monitoring personnel can know the falling time of a high-altitude falling object and the position of a monitoring camera device, and the original video can be conveniently consulted to rapidly collect evidence.
The video management module is used for controlling the shooting angle and the focal length of the camera device, managing and storing video information files of a monitored scene and removing the function of a non-concerned area in a video monitoring range; the shooting angle and the focal length of the camera device are set during initial installation, the operation is kept unchanged thereafter, and the camera device is periodically maintained and fine-tuned. It can also provide the management in front of the platform and store original video record to for security protection monitoring personnel to look for when discovering the object that falls or throws the object and collect evidence.
And the background computing unit is used for extracting continuous frames of the video information and subtracting background contents in the extracted frames so as to find out the outline of each moving object in the continuous frames.
The moving object detection module is used for acquiring the outline of a moving object by the background calculation unit; the outline property of each moving object is processed and calibrated, and the minimum outer frame is added to the outline, so that the pixel coordinates of each point of the reference point and the reference identification code of the marked moving object are determined, and the area of the outline is further calculated.
The moving object tracking module is used for tracking the pixel coordinates of the contour reference points of the obtained moving objects by the background calculation program unit; and recording the vector characteristics of the increase and decrease of the outline area for judging the track. The tracking result may also be displayed on the real-time video information in real-time foreground.
And the background calculation program unit is used for judging whether the moving object is a high-altitude falling object according to the change condition of the tracking result of the moving object tracking module. The module judges whether the track of the vector movement data of each reference point of each moving object is matched with the probability estimation track of the falling object. Furthermore, the increase and decrease of the outline area of the moving object are judged to assist in accurately judging the high-altitude falling object. And when the moving object is judged to be the high-altitude falling object, sending an alarm issuing instruction to the alarm module.
And the background processing unit is used for sending alarm information to the external mobile terminal after judging that the moving object is the high-altitude falling object, and storing the identification code of the high-altitude falling object, the falling time and the position information of the monitoring camera device.
In this embodiment, the high altitude projectile monitoring system further includes a display device, such as a display screen, mounted on the support mechanism. The communication module in the control box is provided with a display output port, is generally used for setting, maintaining and collecting certificates, and can be extended and output to the monitoring display screen to display pictures if necessary through the external connection module which is extended and arranged on the hinge position in the 3 columns of the post rod. The display device can be in wired or wireless communication connection with the main control module. On one hand, the display device can play pictures monitored by the camera device 4 in real time, so that the display device has a deterrent effect on building users around a monitored scene and stops the lucky psychology of parabolas; on the other hand, the display device can divide the window to play the related publicity materials, cases and legal content of the sentencing, and plays the roles of publicity, precaution and supervision.
When the high-altitude falling object monitoring system is installed on the ground, an extra space needs to be opened up to accommodate the high-altitude falling object monitoring system, and the space near urban buildings is small and precious, so that the public land is applied and the week chapter is relatively high. Therefore, if the street lamp position is suitable, the street lamp pole can be transformed and replaced, the high-altitude falling object monitoring system replaces the street lamp lighting effect, and the arm rod 2 can be provided with a lighting lamp which is equivalent to a street lamp and used for lighting at night. When the illuminating tool is arranged, the high-altitude falling object monitoring system has the function of a street lamp. The occupied space for arranging the high-altitude falling object monitoring system and the street lamp on the roadside can be saved.
In practical use, the high-altitude falling object monitoring system of the embodiment includes, but is not limited to, the following operation flows:
1. and a high-speed and high-definition camera device 4 on the arm rod 2 is installed through proper positioning to acquire a monitoring real-time video of a monitoring scene, and original real-time video information is synchronously stored in a memory of the video analysis host.
2. The video management module of the video analysis host computer analyzes the video information in real time, in particular to a video frame pixel map of a focus area in the video information. Wherein "region of interest" refers to an area in the video where high-altitude drop behavior may occur. In the video recorded by some camera devices 4, there are some areas where the falling object behavior must not occur, such as a pure sky background area, a background area outside a building, and so on. These regions can be removed manually, thereby significantly reducing the burden required for the computational core analysis algorithms of the computer.
3. A video frame comparison module of a video analysis host machine performs real-time analysis on a region of interest separated from continuous frames of a real-time video, and in the analysis process, whether a moving object exists in the region of interest is firstly detected. This step can be divided into day and night modes, and the night mode can be set with lower sensitivity and high threshold to suppress low resolution errors caused by insufficient light at night.
4. The background content is subtracted from the video information by a video frame comparison module of the video analysis host, and the outline of the moving object is distinguished by subtracting the background content, so that the method can obviously reduce the calculation processing burden of the video analysis host, and the operation rate of the host is not affected. Meanwhile, the operation burden of the video analysis host is reduced, so that the monitoring of the high-altitude falling object can be carried out in real time, and the responsibility can be traced in time.
5. The moving object detection module of the video analysis host locates the moving object on the basis of the video information of which the background content is subtracted, and obtains the outline, the area, the minimum outer frame reference DIAN and the identification code of the moving object. In this embodiment, the outline of the moving object is obtained by subtracting the background from the pixel map of the video continuous frames and comparing the subtracted result to obtain the outline area, and the minimum outer frame is added to the outline edge, so that the minimum outer frame point is used as a reference point and the movement data and the area change of the pixel coordinates of the video are compiled and the identification code is compiled so as to facilitate the track judgment.
6. A moving object track judging module of the video analysis host can judge whether the moving object is a high-altitude falling object or not according to the moving track of the moving object reference point separated from each continuous frame and the change condition of the outer contour area.
In order to match with the camera 4 at different positions, the change rules of the motion of the shot moving objects are different, so that the high-altitude falling objects can be judged by comprehensively corresponding to different installation scenes by presetting the corresponding change models.
Therefore, a user can preset a change model of the high-altitude falling object according to the position of the camera device 4 for acquiring the monitoring scene;
then, the outline area size and the track change condition of the moving object are compared with the change model by using the moving object track judging module, so that whether the moving object is a high-altitude falling object or not can be judged.
For example, when the image pickup device 4 is installed below the monitoring scene and is disposed obliquely upward, the overall outline area of the high-altitude falling object inevitably becomes larger and larger as the high-altitude falling object falls without being in close proximity to the image pickup device 4, and therefore, it can be determined that the moving object is the high-altitude falling object on the premise that the moving trajectory is downward and the outline area is increased.
Similar reasoning applies to the case where the camera 4 is mounted above the monitored scene, where the contour area of the high altitude projectile inevitably becomes smaller and the trajectory of the movement is downward.
The camera 4 may be installed in a building opposite to the monitoring scene, and two buildings facing each other may be monitored by each other. When the camera device 4 is installed in the middle of the opposite side of the monitoring scene and is arranged in the horizontal direction, the contour reference point of the high-altitude falling object moves from top to bottom and the contour area is basically unchanged. Therefore, the falling state of the high-altitude falling object can be effectively predicted by adopting the model.
In the embodiment, the change of the motion vector track of the moving object is calculated by analyzing the continuous frames in the video information shot by the camera device 4 by means of the visual tracking technology, so that the falling object in the high altitude is identified, and the technical effect of real-time alarm is realized.
The video monitoring technology adopted in the embodiment refers to a technology for acquiring videos, monitoring fortification areas, displaying and recording field videos in real time, and retrieving and displaying historical videos by using the video monitoring technology. Video monitoring technology relies on electronic systems or network systems, has gradually become a foundation in the field of security and protection, and is increasingly widely permeating places in various other fields such as education, government, entertainment, medical treatment, hotels, sports and the like.
Second embodiment
When the high-altitude falling object monitoring system is installed on the ground, although the occupied area of the trunk 3 is very small, the installation and the laying of the line are time-consuming, if a street lamp is transformed into a falling object monitoring device, the position of the street lamp is matched with the requirements of monitoring the installation position, the angle and even the height, building districts are easy to match, and the matching of buildings with insufficient ground space beside a downtown road is relatively difficult.
A second embodiment of the present invention provides a high-altitude falling object monitoring system, which is different from the high-altitude falling object monitoring system of the first embodiment, mainly in that the high-altitude falling object monitoring system is provided on the ground in the first embodiment of the present invention, whereas the high-altitude falling object monitoring system is provided with a canopy mounting post, as shown in fig. 4, and thus can be provided on a canopy or a cornice of a building in the second embodiment of the present invention.
The high-altitude falling object throwing monitoring system arranged on the eaves shed does not occupy extra space on the ground and cannot obstruct pedestrians. Meanwhile, the idle people and the like are difficult to contact the high-altitude falling object monitoring system, so that malicious damage and interference to the high-altitude falling object monitoring system are reduced, the reliability of operation is improved, and the service life is prolonged.
In the embodiment, the user can also preset a change model of the high-altitude falling object according to the position of the camera device 4 for acquiring the monitoring scene;
then, the outline area of the moving object and the vector position change condition of the reference point are compared with the change model by using the moving object track judging module, so that whether the moving object is a high-altitude falling object or not can be judged.
When the camera device 4 is installed on the canopy below the monitoring scene and is arranged obliquely upwards, the camera device 4 is not in continuous proximity with the falling object falling from the high-altitude falling object, the overall outline area of the camera device is inevitably larger and larger, and therefore whether the moving object belongs to the high-altitude falling object or not can be judged on the premise that the moving track is downward and the outline area is increased. By adopting the model, the falling state of the high-altitude falling object can be effectively predicted.
Third embodiment
When the high-altitude falling object monitoring device is installed on the ground and the eaves shed, technical matching difficulty occurs, and when a monitoring target floor is on a higher floor, the high-altitude falling object monitoring device can be installed on the top layer of the floor as shown in fig. 5.
In the time of in-service use, camera device 4 who keeps away from base 1 can be used for the picture of the biggest angle of elevation of control, be fit for being responsible for monitoring lower floor, be close to picture of camera device 4 utensil middle angle of elevation in the middle of the centre, be fit for monitoring middle floor, camera device 4 who is close to base 1 can be used for the picture of the minimum angle of elevation of control, be fit for being responsible for monitoring higher floor, this kind of setting makes control picture edge overlap, when the error appears in the control shooting analysis of the highest floor, the object that falls must pass through the monitoring range on middle level and low level, so the control analysis has the overlap nature, thereby the reliability of high altitude object falling monitoring devices has been improved, prevent to calculate the interference of workers. Fig. 7 is a sectional view of the monitoring camera device of the air drop monitoring device according to the present invention.
In the embodiment, the system can preset a change model of the high-altitude falling object according to the position of the camera device 4 for acquiring the monitoring scene;
then, the outline area of the moving object and the vector position change condition of the reference point are compared with the change model by using the moving object track judging module, so that whether the moving object is a high-altitude falling object or not can be judged.
When the camera device 4 is installed on the top layer of the monitoring scene and obliquely extends downwards, the overall outline area of the camera device 4 is inevitably smaller and smaller along with the falling of the high-altitude falling object and is continuously away from the camera device 4, so that the mobile object can be judged to be the high-altitude falling object on the premise of meeting the two conditions of downward movement track and increased outline area.
In addition, the analysis system of the invention can directly import the video data for searching the moving object without the video acquisition step, thereby being capable of providing the original video for re-examination.
It will be appreciated by those of ordinary skill in the art that in the embodiments described above, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solutions claimed in the claims of the present application can be basically implemented without these technical details and various changes and modifications based on the above-described embodiments. Accordingly, in actual practice, various changes in form and detail may be made to the above-described embodiments without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a falling object monitoring system is thrown to high altitude for the throwing falling object that the control was thrown from the building, includes supporting mechanism, a plurality of camera device and control box, its characterized in that: the supporting mechanism comprises a base and an arm rod connected to the base, and the arm rod and the base are arranged at an angle;
the plurality of camera devices are arranged on the arm rod at intervals along the length direction of the arm rod;
a video analysis host is installed in the control box;
the video analysis host is in communication connection with each camera device and comprises a video analysis processing device and a communication device; the video analysis processing device is used for processing video data shot by the camera device, and identifying and judging whether a high-altitude falling object exists or not from the video data; and when the video analysis processing device judges that the high-altitude falling object occurs, the communication device is utilized to send alarm information to an external terminal.
2. The high altitude projectile monitoring system of claim 1, wherein: the video analysis processing apparatus includes: the system comprises a video management module, a video frame comparison module, a moving object detection module, a moving object tracking module, a moving object track judging module and an alarm module.
3. The high altitude projectile detection system of claim 2 wherein said video management module includes a video memory, said video memory storing video information of a monitored scene;
the video management module can manage the video information stored in the video memory and remove the non-concerned area in the video information; the video management module can also configure the working parameters of the camera device;
the video frame comparison module can extract continuous video frames from the video information copied in real time in the video management module, subtract background contents in the video frames through the comparison of the continuous video frames and calibrate the outline of a moving object in the video frames;
after the moving object detection module obtains the outline of the moving object, calculating the area of the outline, calibrating the minimum outline reference point of the outline, and then compiling an identification code for the outline;
the moving object tracking module tracks the subsequent video frames of the key video frames according to the identification codes of the outlines and calculates the vector change and the area change of the minimum outer frame reference point;
the moving object track judging module is used for judging whether the moving object is a high-altitude falling object or not according to the outline area of the moving object and the vector change condition of the minimum outer frame reference point; if the moving object is judged to be a high-altitude falling object, an alarm module is informed to send warning information;
and the alarm module stores the alarm information and transmits the alarm information to the external terminal by using the communication device after receiving the notice of the alarm information.
4. The high altitude projectile monitoring system of claim 1 wherein said arm is disposed in an inclined upward orientation, the elevation angle at which each camera is mounted on the arm being set between 20 ° and 45 °.
5. The high altitude projectile monitoring system of claim 1 wherein said arm is mounted in a reverse, inclined downward orientation, and wherein the angle of depression of each camera mounted on the arm is set between 20 ° and 45 °.
6. The high altitude projectile monitoring system as defined in any one of claims 1 to 5, wherein said support mechanism further comprises a mast disposed on the ground surrounding a building to be monitored by said high altitude projectile monitoring system, said base being mounted on the top end of said mast.
7. The high altitude projectile monitoring system of claim 6 wherein said mast is connected to said base by a rotatable swivel bearing, said mast having a hinge for rotatably lowering said base, said arm and said control box.
8. The high altitude projectile monitoring system of claim 6 wherein said mast is mounted on a canopy or eave of a building.
9. The high altitude drop monitoring system of claim 6, wherein the mast is mounted on a top ceiling of the building after inverted installation.
10. The air drop monitoring system of claim 1, further comprising a display device mounted on the support mechanism;
the display device is in communication connection with the video analysis host and is used for displaying working parameters, stored data and a real-time monitoring video interface of the high-altitude falling object monitoring system.
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