Cluster alarm method and system for preventing high-altitude falling objects

Abstract

The invention discloses an anti-high-altitude falling object cluster alarm method. The method comprises the following steps: 1) shooting a video image; (2) video image scanning is carried out on the shot video image, and a video page is intercepted and stored; 3) carrying out image segmentation on the intercepted video page, and setting a plurality of falling belts; 4) carrying out image analysis on the video page, judging a falling zone where the object is located, and calculating the falling time of the object in the falling zone; and 5) sending an alarm signal to the individual or group wearing the individual receiving device by using the communication system. According to the invention, real-time monitoring and timely early warning can be realized, and injuries such as crushing injury to personnel below or on the ground can be effectively prevented.

Description

Technical Field

[0001] The invention belongs to the field of electronic information technology, and in particular relates to a cluster alarm method and system for preventing high-altitude falling objects. Background Art

[0002] At present, the management methods and measures for preventing falling objects from high altitudes are mostly concentrated in theory, lacking preventive measures and devices applying scientific and technological applications. The management methods for preventing falling objects from high altitudes are single, the prevention means are backward, the prevention and control methods are passive, and the prevention effect is poor. There is no early warning for some falling objects from high altitudes, and people are often injured by falling objects, especially in construction sites. Summary of the invention

[0003] The purpose of the present invention is to provide a cluster alarm method and system for preventing falling objects from high altitude, which can monitor in real time, give early warning in time, and effectively prevent injuries such as being smashed to people below or on the ground.

[0004] To achieve the above object, the present invention provides a cluster alarm method for preventing falling objects from high altitude, comprising the following steps:

[0005] 1) Video image shooting;

[0006] 2) Scanning the captured video images, capturing and storing the video pages;

[0007] 3) Segment the captured video page and set a number of falling zones;

[0008] 4) Perform image analysis on the video page to determine the falling zone where the object is located;

[0009] 5) Use the communication system to send warning signals to individuals or groups wearing personal receiving devices.

[0010] As a further solution of the present invention: the video captured images are continuous images, and the video pages are sampled and captured according to the video image refresh time.

[0011] As a further solution of the present invention: in the process of image analysis on the video page, the time when the object falls is calculated to determine whether to issue an alarm signal.

[0012] To achieve the above object, the present invention also provides a system based on the anti-high-altitude falling object cluster alarm method, comprising:

[0013] Master control equipment: controls the entire system;

[0014] Terminal display device: connected to the master control device for video image display and monitoring;

[0015] Camera: used for video image shooting, connected to video storage media and video image scanning through the camera interface;

[0016] Video storage medium: connected to the terminal display device, used to store the microprocessor working program;

[0017] Video image scanning: monitor objects on the video image. Only when the object on the entire instantaneous image is found to be moving downward rapidly, the whole system starts to respond, and performs video page capture, image page segmentation, falling zone setting, and moving object image analysis in sequence;

[0018] Microprocessor: connected with the master control device, terminal display device, video page capture, and moving object image analysis, used to process and analyze the video image and determine the falling zone where the object is located;

[0019] Communication system: connected to the master control equipment and microprocessor, wirelessly connected to the personal receiving device through the gateway, and sends out alarm signals according to the instructions of the microprocessor;

[0020] Page dynamic storage RAM: connected with the microprocessor and communication system, it stores each video image containing different positions and different falling zones of the object in the form of video pages, which serves as the basis for the microprocessor to analyze the video image;

[0021] ROM: connected to the microprocessor and used to store video images.

[0022] As a further solution of the present invention: the personal receiving device includes a signal receiving, processing chip, a driver and a speaker which are connected in sequence, and is centrally powered by a button battery.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] By extracting the video image page, segmenting the video image, setting the falling zone for the video page and analyzing the downward moving objects on each image page, the downward moving time of the object in the image is calculated, and while storing the image page, each image data is sent to the microprocessor, which analyzes and judges it. Based on the results of the analysis and judgment, a cluster alarm signal is sent to the communication system; the communication system uses the address data of the set personal device to correctly send out the alarm signal of the ground personal receiving device within the falling zone, and uses voice or other sounds to warn passers-by or individuals or groups under construction, thereby realizing the cluster alarm function to prevent injuries from falling objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the system structure of the present invention. (In the figure: solid line unidirectional: control line, solid line bidirectional: control, feedback bidirectional instructions, frame bidirectional arrow: data, address bidirectional transmission)

[0026] Figure 2 It is a schematic diagram of video image scanning in the present invention.

[0027] Figure 3 It is a schematic diagram of a video page captured in the present invention.

[0028] Figure 4 It is a schematic diagram of the separation of the falling zone in the present invention.

[0029] Figure 5 It is a schematic diagram of the size of the falling zone of a 75-inch 8k, 16:9 LCD display screen in the present invention.

[0030] Figure 6 It is a schematic diagram of setting the falling zone in the present invention.

[0031] Figure 7 It is a schematic diagram of the moving object analysis in the present invention.

[0032] Figure 8 It is a schematic diagram of an image page stored in the page dynamic memory RAM in the present invention.

[0033] Fig. 9 It is a schematic diagram of a personal receiving device in the present invention. DETAILED DESCRIPTION

[0034] The present invention will be further described below by way of examples.

[0035] like Figure 1 As shown, a cluster alarm method for preventing falling objects from high altitude includes the following steps:

[0036] 1) Video image shooting;

[0037] The present invention needs to analyze the captured video images, so the camera used is a digital video camera. According to the 16:9 shooting screen, the camera definition supports at least 4k, that is, 3840×2160 pixels. In special occasions, a camera supporting 8k should be used, with a pixel of 7680×4320; the video image refresh rate used in the present invention is at least 144Hz;

[0038] High-definition cameras make images clearer and more delicate, and can capture the details of object movement more accurately; high refresh rates make the response to video images fast and short, and changes in object positions can be reflected on the screen more quickly, reducing blur and smearing, which is conducive to the system's rapid response;

[0039] Connect the video storage medium and video image scanning through the camera interface. When the captured video needs to be stored, the video storage medium can be a mechanical hard disk or SSD.

[0040] 2) Scanning the captured video images, capturing and storing the video pages;

[0041] like Figure 2 As shown, under normal circumstances, the digital video camera is fixedly installed at an appropriate position of the area to be monitored, and the viewing angle and direction of the camera shooting cannot be changed; when working, the camera scans and shoots the monitored area all the time; because the present invention monitors objects on the video image, only when it is found that there is an object moving rapidly from top to bottom on the entire instantaneous image, the entire system and control mechanism begin to respond, and when there is an object moving rapidly downward, the intercepted video page is transferred, analyzed, judged, and processed as needed. The system is equipped with a dedicated image storage device, so the video shot by the camera can be determined according to the needs of the user to determine whether to configure a hard disk recorder for long-term storage; in order to analyze the cause of the object falling later and repeatedly play the video, the system has a hard disk recorder interface and is equipped with a storage medium (such as a hard disk, etc.) that can be stored for 7 days;

[0042] Furthermore, the video capture is a continuous image. To obtain the moving objects on the image, the video page needs to be sampled to form an instantaneous still image. The sampling time is very short. The video page is sampled and intercepted according to the video image refresh time. The sampling can also be set to be performed at a certain interval. The sampled image is temporarily transferred to the storage chip of the master control device for the microprocessor to analyze the image and the moving objects on the image.

[0043] Since the video image scanning is a continuous image with a wide range, the microprocessor needs to analyze the sampled image at multiple points and multiple times. Once an object moving downward is found, the processor will determine whether it is necessary to send a signal output instruction to the communication system within the set time range and falling zone based on the analysis and judgment results;

[0044] Since the sampling time interval of the video image is short and the sampling is continuous, the time for sampling, image storage, image analysis and judgment is also relatively short, which does not affect the continuous sampling, storage, analysis, judgment and command output of the video image, and the entire system can work continuously;

[0045] like Figure 3 As shown, the small black dots in the figure represent the objects moving on the sampled video page image. Within the sampling time interval range, it can be found that the objects are moving downwards;

[0046] 3) Segment the captured video page and set a number of falling zones;

[0047] The main purpose of image segmentation is to divide the captured video page (a still image) into several vertical bands with equal spacing according to a certain time interval, that is, set as several falling bands, such as Figure 4The falling zone 1 to falling zone n in the image can realize simultaneous and real-time monitoring and alarm of multiple falling objects when different objects move downward in multiple images captured at different times;

[0048] Taking the commonly used 75-inch 16:9 LCD screen as an example, the diagonal length of the screen is 190.5 cm according to 1 inch equals 2.54 cm, and the screen size is about 165.1 cm × 92.9 cm. Taking the video 8k image resolution of 7680*4230 as an example, the size of each falling band is 480*4230 pixels. Figure 5 As shown;

[0049] The purpose of setting a falling zone is that when an object moves downward, it will drift due to air resistance. It does not move in a straight line, but has a range of downward movement. In order to enhance the processor's ability to analyze downward moving objects and improve the accuracy of the processor's analysis and judgment, when an early warning is issued, it is necessary to send a unified alarm signal to the personnel in the falling zone on the ground. This is an important step in realizing cluster alarm.

[0050] like Figure 5 As shown, due to the existence of the falling belt, when capturing video images, it is possible to monitor multiple objects and process multiple falling belts at the same time, while avoiding the sending of erroneous alarm signals due to improper processing when there are multiple falling objects in the entire monitoring area;

[0051] When capturing a video image page, through the analysis, processing and judgment of different falling zones, a multi-task processing system is adopted. When objects fall in multiple falling zones at the same time, multiple early warning instructions can be sent to the communication system at the same time or according to the time difference of the falling of different objects after being processed by the microprocessor. The communication system sends alarm signals to personal devices in different falling zones, and timely reminds the person or group carrying the personal device to send alarm signals, such as Figure 6 As shown;

[0052] 4) Perform image analysis on the video page to determine the falling zone where the object is located;

[0053] The essence of image analysis is the analysis of moving objects on an image;

[0054] Further, such as Figure 7 As shown, the position of the object moving downward on the video page is intercepted, and in the process of image analysis of the video page, the time when the object falls is calculated to determine whether to send an alarm signal to the microprocessor;

[0055] By detecting the position a (a1, a2, a3) of the object in the video page, the falling time t of the object in the video page can be calculated (because there is acceleration when the object falls, so t1>t2>t3). Because of the difference in position and time, it can be judged that the object in the image is moving downward rapidly;

[0056] Because the present invention refers to continuous sampling of video images, continuous segmentation of video images, the objects on the acquired image page move downward from the top of the image according to different falling zones, and although the height is not the main sampling index, when the height needs to be indicated, h = gt2 / 2 (g is the acceleration of gravity, which is 9.8m / s 2 ) calculate the height of descent;

[0057] Whether the object position moves downward, the time it takes for the object to move downward, or the distance it moves, all can be obtained from the sample video page, so it can be explained that the height of the object decreases, that is, the object is accelerating downward;

[0058] The system needs to determine the falling zone where the object is located, determine that the object is moving downward, determine that the speed of the object is gradually increasing from time t1 to time t3 (or t01-t03) (due to acceleration), and when the time is gradually decreasing, it can quickly determine whether there is a risk of rapid falling of an object in the falling zone and issue a warning signal as soon as possible;

[0059] 5) Using the communication system to send warning signals to individuals or groups wearing personal receiving devices;

[0060] The microprocessor identifies the position, time and height of the moving object on the stored video page, and then sends instructions to the communication system, and sends the instantaneous image analysis and judgment data at the same time. The communication system sends an alarm signal to the person or group according to the preset address data;

[0061] The individual or group receiving the warning signal needs to wear a personal receiving device in advance, and send a corresponding alarm start signal - prompt voice or sound - to the personal receiving device through the corresponding address data of the personal receiving device pre-set in the communication system;

[0062] The alarm prompt voice or alarm sound is set to be different from the ordinary SMS prompt sound or a sound with obvious warning characteristics, which is determined when the personal receiving device is produced.

[0063] The present invention also provides a system based on the high-altitude falling object prevention cluster alarm method, comprising:

[0064] General control equipment: controls the entire system and realizes human-computer interaction, including controlling whether the microprocessor recognizes and analyzes the video image; controlling whether the communication system sends out an alarm signal; selecting the area and personal receiving device code for sending the alarm signal; based on the system's analysis and judgment and the system's processing results, sending an alarm signal or an alarm device activation code to the person carrying the personal receiving device within the fall zone;

[0065] Terminal display device: connected to the master control device for video image display and monitoring; displays images within the falling zone as needed, with basic display operations such as zooming in and out;

[0066] Camera: used for video image shooting, connected to video storage media and video image scanning through the camera interface;

[0067] Video storage medium: connected to the terminal display device and used to store view images;

[0068] Video image scanning: monitor objects on the video image. Only when the object on the entire instantaneous image is found to be moving downward rapidly, the whole system starts to respond, and performs video page capture, image page segmentation, falling zone setting, and moving object image analysis in sequence;

[0069] Microprocessor: connected with the master control device, terminal display device, video page capture, and moving object image analysis, used to process and analyze the video image and determine the falling zone where the object is located;

[0070] Communication system: connected to the master control device and microprocessor, wirelessly connected to the personal receiving device through the gateway, and sends out an alarm signal according to the microprocessor instruction; the communication system uses the public Wi-Fi (IEEE 802.11aWiFi4G or 5G) wireless network protocol, taking advantage of its wide coverage or ability to cover various occasions, to achieve communication with the personal receiving device and send out an alarm signal to the personal receiving device;

[0071] Page dynamic storage RAM: connected with microprocessor and communication system, it stores each video image containing different positions and falling zones of objects in the form of video pages, such as Figure 8 As shown, it serves as the basis for the microprocessor to analyze the video image;

[0072] The images stored in the page dynamic memory RAM start working with the system, and are determined according to the predetermined size and page storage method. If the memory capacity is exceeded, it will overflow automatically. The memory capacity is determined according to the needs. If it is necessary to view the historical video images, a request is made to the system through the master control device and the images are called out from the video storage medium;

[0073] Taking the video 8k image resolution of 7680*4230 as an example, the page size of each fall zone is 480*4230 pixels; the system reads the set sampling times according to the preset time, and then transmits it to the microprocessor for analysis to determine the position and time of the soil object moving downward;

[0074] The system can read the stored images in full screen or in separate falling strips, which can be used to analyze images or important data for accident analysis;

[0075] ROM: connected to the microprocessor and used to store the microprocessor working program.

[0076] Further, such as Fig. 9 As shown, the personal receiving device includes a signal receiving, processing chip, driver and speaker connected in sequence, and is powered by a button battery. The processing chip supports IEEE 802.11a WiFi 4G or 5G wireless network protocol, and receives alarm instructions issued by the communication system of the present invention through public WiFi to realize cluster control; the alarm signal can be a warning or voice prompt according to customized requirements.

[0077] For easy carrying, the personal device can be in the form of a bracelet, button, key chain, etc. and customized as needed.

[0078] It will be different depending on the quality of the video image and the application scenario. The distance at which the present invention can correctly identify the falling object is related to the clarity of the video image taken by the selected camera. The basic requirement as mentioned above is that the video camera clarity should at least support 4k, that is, 3840×2160 pixels. Special occasions should use a camera that supports 8k, with a pixel of 7680×4320. The images taken by a high-definition camera can clearly show the details of the background and dangerous objects being photographed. The shooting distance is selected according to the needs. The closer the distance, the clearer the image, and the faster and more accurate the system response.

[0079] The present invention can be applied in many occasions:

[0080] Construction sites: used to monitor objects that may fall from above the building to prevent ground personnel from being injured;

[0081] Residential areas: prevent objects from being thrown from high places or falling from high places from injuring people on the ground;

[0082] Public places: In public passages, building edges and other places, prevent people walking by from being hit by suddenly falling unknown objects;

[0083] Special environment: Directionally and within a certain range, monitor objects above buildings and their status, and respond quickly to falling or dangerous objects, and send alarm signals to ground personnel;

[0084] Abnormal event warning: monitoring and warning of abnormal events;

[0085] Other environments and places where prevention of falling objects from heights is required.

Claims

1. A cluster alarm method for preventing falling objects from high altitude, characterized in that: The following steps are involved: 1) Video image shooting; 2) Scanning the captured video images, capturing and storing the video pages; 3) Segment the captured video page and set a number of falling zones; 4) Perform image analysis on the video page to determine the falling zone where the object is located; 5) Use the communication system to send warning signals to individuals or groups wearing personal receiving devices.

2. A cluster alarm method for preventing falling objects from high altitude according to claim 1, characterized in that: The video images are continuous images, and the video pages are sampled and captured according to the video image refresh time.

3. A cluster alarm method for preventing falling objects from high altitude according to claim 1, characterized in that: In the process of image analysis on the video page, the time of the object's descent is calculated to determine whether to issue an alarm signal.

4. A system based on the anti-falling-object cluster warning method according to any one of claims 1 to 3, characterized in that: include: Master control equipment: controls the entire system; Terminal display device: connected to the master control device for video image display and monitoring; Camera: used for video image shooting, connected to video storage media and video image scanning through the camera interface; Video storage medium: connected to the terminal display device and used to store view images; Video image scanning: monitor objects on the video image. Only when the object on the entire instantaneous image is found to be moving downward rapidly, the whole system starts to respond, and performs video page capture, image page segmentation, falling zone setting, and moving object image analysis in sequence; Microprocessor: connected with the master control device, terminal display device, video page capture, and moving object image analysis, used to process and analyze the video image and determine the falling zone where the object is located; Communication system: connected to the master control equipment and microprocessor, wirelessly connected to the personal receiving device through the gateway, and sends out alarm signals according to the instructions of the microprocessor; Page dynamic storage RAM: connected with the microprocessor and communication system, it stores each video image containing different positions and different falling zones of the object in the form of video pages, which serves as the basis for the microprocessor to analyze the video image; ROM: connected to the microprocessor and used to store the microprocessor working program.

5. A system based on the cluster warning method for preventing falling objects from high altitude according to claim 4, characterized in that: The personal receiving device includes a signal receiving and processing chip, a driver and a speaker which are connected in sequence and are centrally powered by a button battery.

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