Indoor smoking management method and system based on infrared monitoring

Abstract

The present application belongs to the technical field of smoking monitoring, and particularly relates to an indoor smoking management method based on infrared monitoring. The indoor smoking management method based on infrared monitoring comprises at least the following steps: a monitoring step of monitoring the ambient temperature in a monitoring range in real time; a smoking judgment step of regarding a smoking event as occurring when a high temperature point higher than a preset smoking temperature point is judged to exist; a judgment confirmation step of continuously performing the real-time monitoring step to obtain the motion trail of the high temperature point after the high temperature point occurs, and performing reconfirmation of the smoking behavior; and a notification step of performing alarm and recording the smoking event after the smoking event is judged and confirmed to occur. The indoor smoking management method based on infrared monitoring can accurately judge the occurrence of the smoking behavior through infrared heat detection, image analysis and behavior judgment, and timely perform alarm processing.

Description

Technical Field

[0001] This invention belongs to the field of smoking monitoring technology, and in particular relates to an indoor smoking management method and system based on infrared monitoring. Background Technology

[0002] In modern life, indoor fires frequently occur, some of which are caused by smoking, especially in densely populated environments such as dormitories and apartments. Therefore, it is necessary to install smoking detection equipment. This equipment can detect the indoor environment and promptly identify potential fire hazards such as smoking.

[0003] With the rapid development of artificial intelligence technology, the use of infrared thermal imaging technology to detect dangerous heat sources such as smoke has become a trend. Compared to current smoke detectors that rely on physical and chemical methods, it can detect other dangerous heat sources besides smoke, such as electric water heaters, heaters, damaged electrical wiring, and electric blankets, thus providing a more comprehensive approach to fire prevention and improving fire safety. However, due to the numerous influencing factors indoors, ordinary infrared temperature detection methods may produce misjudgments and lack sufficient impartiality when implementing indoor smoking management. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an indoor smoking management method based on infrared monitoring. By using infrared thermal detection, supplemented by image analysis and behavior judgment, the method can accurately determine the occurrence of smoking behavior and promptly issue an alarm.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An indoor smoking management method based on infrared monitoring includes the following steps:

[0007] At least the following steps are included:

[0008] The monitoring process involves real-time monitoring of the ambient temperature within the monitored area.

[0009] The smoking detection process is as follows: when a high temperature point higher than the preset smoking temperature is detected, a smoking event is considered to have occurred.

[0010] After the high temperature point is detected, the real-time monitoring step is executed to obtain the movement trajectory of the high temperature point and to reconfirm the smoking behavior. Once the smoking event is confirmed, the notification step is executed.

[0011] The notification step involves triggering an alarm and recording the smoking incident.

[0012] As a preferred embodiment of this technical solution, the following method is included before the smoking determination step:

[0013] The ignition judgment triggering step involves real-time monitoring of the ambient temperature within the monitoring range. When the ambient temperature within the monitoring range is determined to be higher than the preset ignition temperature, the ignition judgment step is triggered.

[0014] The ignition judgment and confirmation step involves real-time monitoring of the ambient temperature within the monitoring range during a preset ignition time, determining whether there is a sudden drop in temperature within the monitoring range, and if the determination result indicates that there is a sudden drop in temperature within the monitoring range, then it is determined that an ignition event has occurred within the monitoring range.

[0015] As a preferred embodiment of this technical solution, the determination and confirmation step includes:

[0016] In the annotation sub-step, when it is determined that there is a high-temperature point that is higher than the preset smoking temperature, the high-temperature point is annotated and its initial coordinates are extracted.

[0017] The motion trajectory acquisition sub-step involves acquiring the coordinates of the high-temperature point within a preset smoking cycle and obtaining the motion path at all times using the point plotting method.

[0018] The analysis and judgment sub-step involves performing behavioral analysis on the movement path to determine whether the movement path conforms to the high-temperature smoking point movement model. If the movement path is determined to conform to the high-temperature smoking point movement model, then it is confirmed that a smoking event has occurred within the monitoring range.

[0019] As a preferred embodiment of this technical solution, the analysis and judgment sub-step includes: determining whether the movement trajectory of the high-temperature point has a reciprocating up-and-down movement relative to the initial coordinate within a preset smoking cycle; if the judgment result is yes, then it is confirmed that a smoking event has occurred within the monitoring range.

[0020] As a preferred embodiment of this technical solution, the analysis and judgment sub-step includes: determining whether the movement trajectory of the high-temperature point has a reciprocating up-and-down movement relative to the smoking reference area within a preset smoking cycle; if the judgment result is yes, then it is confirmed that a smoking event has occurred within the monitoring range.

[0021] The smoking reference area is a region that conforms to a preset temperature of the human face, derived from the contour features of the human face.

[0022] As a preferred embodiment of this technical solution, the determination and confirmation step further includes:

[0023] The smoking detection sub-step determines whether, within a preset smoking cycle, the coordinates of the high-temperature point are within the smoking reference area at at least one moment. If it is determined that the coordinates of the high-temperature point are within the smoking reference area at at least one moment, then it determines whether there is a budgeted temperature difference between the temperature of the high-temperature point's outline edge and the temperature of the smoking reference area's outline edge, which is sufficient to indicate that a smoking behavior is occurring. If the budgeted temperature difference exists, then it is confirmed that a smoking event has occurred within the monitoring range.

[0024] As a preferred embodiment of this technical solution, a linked evidence storage step is also included:

[0025] Obtain the starting time of the high temperature point, and retrieve the video surveillance footage within the preset storage time based on the starting time.

[0026] As a preferred embodiment of this technical solution, when it is determined that there are multiple high-temperature points, the linkage evidence storage step is initiated only once.

[0027] An indoor smoking management system based on infrared monitoring is characterized by comprising an infrared concealed smoking detector installed indoors, a cloud server, and a remote monitoring terminal; the infrared concealed smoking detector is a concealed smoking detector integrating a multi-band infrared detection module, an infrared thermal imaging image acquisition module, and a communication module.

[0028] As a preferred embodiment of this technical solution, a camera installed in an outdoor passageway is also included.

[0029] By implementing the above technical solution, the present invention has the following advantages:

[0030] This invention designs an indoor smoking management method based on infrared monitoring. By using infrared thermal detection, supplemented by image analysis and behavior judgment, it can accurately determine the occurrence of smoking behavior and promptly issue an alarm. Attached Figure Description

[0031] Figure 1 This is a flowchart of an indoor smoking management method based on infrared monitoring according to this application.

[0032] Figure 2 This is a block diagram of the method for determining the existence of the high-temperature point in this application.

[0033] Figure 3 This is a schematic diagram of the principle of this application;

[0034] Figure 4 This is a flowchart illustrating the judgment process of an indoor smoking management method based on infrared monitoring, as described in this application. Detailed Implementation

[0035] The present invention will be further described below with reference to specific embodiments and experimental data. It should be understood that the embodiments of the present invention are only for illustrating the present invention and not for limiting the present invention. Various substitutions and modifications made based on ordinary technical knowledge and conventional means in the art without departing from the technical spirit of the present invention should be included within the scope of the present invention.

[0036] Example 1

[0037] like Figures 1-4 As shown, an indoor smoking management method based on infrared monitoring includes the following steps:

[0038] Real-time infrared thermal monitoring is performed on the monitoring area. When a high-temperature point higher than the preset smoking temperature is detected, the motion characteristics of the high-temperature point within the preset smoking cycle are obtained. The motion characteristics are compared with the preset smoking behavior model. If the motion characteristics are determined to match the preset smoking behavior model, the smoking fact is determined to be established and an alarm is triggered.

[0039] To detect smoking in dormitories on campus, and given regulations prohibiting the installation of cameras in dormitories, the system utilizes a concealed infrared smoke detector 1 that integrates a multi-band infrared detection module, an infrared thermal imaging image acquisition module, and a communication module. Because the infrared thermal imaging image acquisition module provides planar imaging, multiple concealed infrared smoke detectors 1 are installed on the side walls and ceiling of the dormitories to improve monitoring accuracy. The monitoring area is the range that one concealed infrared smoke detector 1 can detect. Since a cigarette typically burns naturally for 15 minutes, the preset smoking cycle is 15 minutes.

[0040] This invention designs an indoor smoking management method based on infrared monitoring. By using infrared thermal detection, supplemented by image analysis and behavior judgment, it can accurately determine the occurrence of smoking behavior and promptly issue an alarm.

[0041] Infrared concealed smoke detectors are installed on the walls of the monitoring area to monitor the heat of the area in real time. The infrared concealed smoke detector 1 is an infrared detector integrating a multi-band infrared detection device, an infrared thermal imaging image acquisition device, signal processing, and alarm functions. The multi-band infrared detection device detects infrared radiation data of different bands within the target area using multiple infrared sensors and sends it to the signal processing device in real time to determine whether a smoke point exists in the target area and outputs the corresponding smoke point detection signal. The infrared thermal imaging image acquisition device acquires infrared thermal images of the target area and sends them to the signal processing device in real time to determine whether an area matching the characteristics of a smoke point exists in the infrared thermal imaging image and outputs the corresponding smoke point detection signal. The alarm output device acquires the judgment signal and outputs a smoke point detection signal according to a preset alarm mode.

[0042] An indoor smoking management method based on infrared monitoring includes at least the following steps:

[0043] The monitoring process involves real-time monitoring of the ambient temperature within the monitored area.

[0044] The smoking detection process is as follows: when a high temperature point higher than the preset smoking temperature is detected, a smoking event is considered to have occurred.

[0045] After a high-temperature point is detected, the real-time monitoring step is executed to obtain the movement trajectory of the high-temperature point and to reconfirm the smoking behavior. Once the smoking event is confirmed, the notification step is executed.

[0046] The notification step involves triggering an alarm and recording the smoking incident.

[0047] The following steps are included before the smoking detection step:

[0048] The ignition judgment triggering step involves real-time monitoring of the ambient temperature within the monitoring range. When it is determined that the ambient temperature within the monitoring range is higher than the preset ignition temperature, the ignition judgment step is triggered.

[0049] The ignition judgment and confirmation step involves real-time monitoring of the ambient temperature within the monitoring range during a preset ignition time, determining whether there is a sudden drop in temperature within the monitoring range, and if the determination result indicates that there is a sudden drop in temperature within the monitoring range, then it is determined that an ignition event has occurred within the monitoring range.

[0050] The multi-band infrared detection device is mainly used to detect signals and transmit them to a signal processing device. The signal processing device uses a smoke point algorithm to correlate and analyze the mathematical relationship between the radiation intensity of each band. If the mathematical relationship matches the preset smoke point radiation characteristics, it indicates that a smoke point exists in the current field of view. The infrared thermal imaging image detection device analyzes the image of the target area to determine whether there is a high-temperature point that meets the temperature range above the preset smoking temperature. It then determines whether there are people around the current high-temperature point. If a high-temperature point that meets the conditions exists, it further analyzes whether the position change and temperature change of the high-temperature area match the smoke point characteristics. If they match, it determines that a smoke point exists in the target area, performs trajectory determination, and outputs an alarm signal.

[0051] The starting time when the infrared concealed smoke detector detects the high temperature point is obtained. Starting from the starting time, all real-time infrared thermal monitoring images within a preset time period are acquired. The high temperature point is locked and the motion path points at all times are obtained by plotting points. Behavioral analysis is performed on all the motion path points to obtain motion feature information.

[0052] The motion feature information includes motion frequency and at least one continuous motion trajectory.

[0053] Based on the stated movement frequency, each segment of the stated movement trajectory is analyzed to determine whether it belongs to a similar movement behavior. If the result is yes, it is considered suspicious smoking behavior. Generally, smoking does not involve finishing a cigarette in one go, so the act of smoking involves multiple repetitive actions. This necessarily includes multiple actions of raising the hand to place the cigarette in the mouth, smoking, removing the cigarette from the mouth, and lowering the hand. If the analysis of each segment of the movement trajectory matches the behavior of smoking and also involves multiple similar behaviors, it can be considered suspicious smoking behavior.

[0054] Example 2

[0055] Based on Example 1, the difference from Example 1 is as follows:

[0056] The following steps are included before the smoking detection step:

[0057] The ignition judgment triggering step involves real-time monitoring of the ambient temperature within the monitoring range. When the ambient temperature within the monitoring range is determined to be higher than the preset ignition temperature, the ignition judgment step is triggered.

[0058] The ignition judgment and confirmation step involves real-time monitoring of the ambient temperature within the monitoring range during a preset ignition time, determining whether there is a sudden drop in temperature within the monitoring range, and if the determination result indicates that there is a sudden drop in temperature within the monitoring range, then it is determined that an ignition event has occurred within the monitoring range.

[0059] When a high-temperature point is detected in the real-time infrared thermal monitoring image, the infrared thermal monitoring image within a preset ignition time prior to that moment is extracted to obtain the highest temperature point in the infrared thermal monitoring image. If the highest temperature point is greater than or equal to the preset ignition temperature, the preset ignition temperature is the temperature at which the lighter ignites the cigarette. Gas lighters use butane gas as fuel, and the flame center temperature of butane combustion is approximately 1800 degrees Celsius. The flame center temperature of kerosene combustion is approximately 1660 degrees Celsius. The flame center temperature of gasoline combustion is approximately 1520 degrees Celsius, while the flame center temperature of a match is higher than that of a gas lighter. In this application, the preset ignition temperature is preferably set to 1520 degrees Celsius. The smoking temperature is the temperature at which a cigarette is ignited. Generally, the temperature at which a cigarette is ignited is 200-500 degrees Celsius, and the preset smoking temperature is considered to be 200 degrees Celsius. If there is a significant temperature drop within the preset ignition time, and this drop occurs from above the preset ignition temperature to the preset smoking temperature, it is considered that ignition has occurred.

[0060] Example 3

[0061] Based on Example 1, the difference from Example 1 is as follows:

[0062] The determination and confirmation step also includes:

[0063] The smoking detection sub-step determines whether, within a preset smoking cycle, the coordinates of the high-temperature point are within the smoking reference area at at least one moment. If it is determined that the coordinates of the high-temperature point are within the smoking reference area at at least one moment, then it determines whether there is a budgeted temperature difference between the temperature of the high-temperature point's outline edge and the temperature of the smoking reference area's outline edge, which is sufficient to indicate that a smoking behavior is occurring. If the budgeted temperature difference exists, then it is confirmed that a smoking event has occurred within the monitoring range.

[0064] Furthermore, when a suspected smoking behavior is determined, thermal imaging analysis is performed on the real-time infrared thermal monitoring image. Based on preset human body information, human body regions are identified, and the facial region and torso region of the human body are distinguished. It is determined whether the movement trajectory passes through the facial region and the torso region. If the determination result is yes, it is considered that smoking behavior exists.

[0065] Example 4

[0066] Based on Example 1, the difference from Example 1 is as follows:

[0067] It also includes a linked evidence preservation step:

[0068] Obtain the starting time of the high temperature point, and retrieve the video surveillance footage within the preset storage time based on the starting time.

[0069] Furthermore, the infrared smoke detector in this application can correlate smoke point detection with personnel. When a high-temperature smoke point is detected, it simultaneously uses a human body thermal model to determine whether someone is present nearby, thus linking smoking detection behavior with people and confirming indoor smoking behavior, providing sufficient evidence for later evidence collection. Simultaneously, spatiotemporal correlation analysis with outdoor video surveillance systems can serve as a basis for tracing the source of smoking behavior. It can also be linked with other systems (such as video surveillance systems in corridors) to monitor the flow of people in corridors in real time through outdoor video surveillance, successfully obtaining entry and exit data for dormitories. This entry and exit data, combined with the detection data from this infrared smoke detector, serves as a basis for tracing the source of smoking behavior.

[0070] Furthermore, real-time outdoor video surveillance equipment can preferably be video surveillance equipment with facial recognition function to more accurately record the entry and exit of people in the dormitory. Combined with multi-band infrared detectors and infrared thermal imaging image detection to monitor the dormitory, it can remotely alarm in real time after smoking occurs, and provide a basis for tracing the source of smoking behavior in the later stage.

[0071] Example 5

[0072] Based on Example 1, the difference from Example 1 is as follows:

[0073] There may be multiple smokers in a dormitory room.

[0074] When it is determined that there are multiple high-temperature points, the linkage evidence preservation step is initiated only once.

[0075] Example 5

[0076] Based on Embodiment 1, here is a system based on Embodiment 1:

[0077] like Figure 3 As shown, an indoor smoking management system based on infrared monitoring includes an infrared concealed smoking detector 1 installed indoors, a cloud server 2, and a remote monitoring terminal 3; the infrared concealed smoking detector 1 is a concealed smoking detector integrating a multi-band infrared detection module, an infrared thermal imaging image acquisition module, and a communication module.

[0078] Furthermore, it also includes cameras 4 installed in outdoor passageways.

Claims

1. A method for managing indoor smoking based on infrared monitoring, characterized in that, At least the following steps are included: The monitoring process involves real-time monitoring of the ambient temperature within the monitored area. The smoking detection process is as follows: when a high temperature point higher than the preset smoking temperature is detected, a smoking event is considered to have occurred. After the high temperature point is detected, the real-time monitoring step is executed to obtain the movement trajectory of the high temperature point and to reconfirm the smoking behavior. Once the smoking event is confirmed, the notification step is executed. The notification step includes triggering an alarm and recording the smoking incident; The following steps are included before the smoking detection step: The ignition judgment triggering step monitors the ambient temperature within the monitoring range in real time. When it is determined that the ambient temperature within the monitoring range is higher than the preset ignition temperature, the ignition judgment confirmation step is triggered. The ignition judgment and confirmation step involves real-time monitoring of the ambient temperature within the monitoring range during a preset ignition time, determining whether there is a sudden drop in temperature within the monitoring range, and if the determination result is that there is a sudden drop in temperature within the monitoring range, then it is determined that an ignition event has occurred within the monitoring range. The determination and confirmation steps include: In the annotation sub-step, when it is determined that there is a high-temperature point that is higher than the preset smoking temperature, the high-temperature point is annotated and its initial coordinates are extracted. The motion trajectory acquisition sub-step involves acquiring the coordinates of the high-temperature point within a preset smoking cycle and obtaining the motion path at all times using the point plotting method. The analysis and judgment sub-step involves performing behavioral analysis on the movement path to determine whether the movement path conforms to the smoking high-temperature point movement model. If the movement path is determined to conform to the smoking high-temperature point movement model, then it is confirmed that a smoking event has occurred within the monitoring range. The analysis and judgment sub-step includes: determining whether the movement trajectory of the high-temperature point has a back-and-forth movement relative to the initial coordinate within a preset smoking cycle; if the judgment result is yes, then it is confirmed that a smoking event has occurred within the monitoring range.

2. The indoor smoking management method based on infrared monitoring according to claim 1, characterized in that, The analysis and judgment sub-step includes: determining whether the movement trajectory of the high-temperature point has a back-and-forth movement relative to the smoking reference area within a preset smoking cycle; if the judgment result is yes, then it is confirmed that a smoking event has occurred within the monitoring range. The smoking reference area is a region that conforms to a preset temperature of the human face, derived from the contour features of the human face.

3. The indoor smoking management method based on infrared monitoring according to claim 2, characterized in that, The determination and confirmation step also includes: The smoking detection sub-step determines whether, within a preset smoking cycle, the coordinates of the high-temperature point are within the smoking reference area at at least one moment. If it is determined that the coordinates of the high-temperature point are within the smoking reference area at at least one moment, then it determines whether there is a budgeted temperature difference between the temperature of the high-temperature point's outline edge and the temperature of the smoking reference area's outline edge, which is sufficient to indicate that a smoking behavior is occurring. If the budgeted temperature difference exists, then it is confirmed that a smoking event has occurred within the monitoring range.

4. The indoor smoking management method based on infrared monitoring according to claim 1, characterized in that, It also includes a linked evidence preservation step: Obtain the starting time of the high temperature point, and retrieve the video surveillance footage within the preset storage time based on the starting time.

5. The indoor smoking management method based on infrared monitoring according to claim 4, characterized in that, When it is determined that there are multiple high-temperature points, the linkage evidence preservation step is initiated only once.

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