TW201915782A - Surveillance method, surveillance device and surveillance system - Google Patents

Abstract

A surveillance method, a surveillance device and a surveillance system are provided. The surveillance method is used to monitor a surveillance object. The surveillance method includes the following steps. When a sensing device detects a trigger event, a trigger maker, a time period and an event name corresponding to the trigger event are generated. A videotaping device monitoring the sensing during the time period is inspected, wherein the videotaping device is in a sensing area of the sensing device. A surveillance video recorded by the videotaping device is obtained. The trigger marker is added into the surveillance video and the surveillance video is stored. The trigger marker and/or the event name is taken as a search condition to obtain the surveillance video having the trigger marker and/or the event name.

Description

Monitoring method, monitoring device, monitoring system

The present invention relates to the field of monitoring, and in particular to a monitoring method for an additional trigger flag and a corresponding trigger period and trigger event name, and a monitoring device thereof and a monitoring system having the same.

The monitoring system is one of the most widely used systems in the security system. As the mainstream monitoring method in the monitoring system, video surveillance is widely used in various types of security objects to monitor the specified monitoring objects. There are two main functions of the monitoring system: one is to alarm the event, that is, when an event (such as some illegal crimes) occurs, and the other is to conduct an event after the event. At present, the existing monitoring systems mainly have the following disadvantages:

1) Depending on the image recognition technology to detect the event, the alarm is not accurate;

2) After-the-fact tracking relies on manual viewing of long-term monitoring videos to retrieve events, which is inefficient.

In view of the deficiencies in the prior art, an object of the present invention is to provide a monitoring method, a monitoring device implementing the monitoring method, and a monitoring system having the monitoring device. This monitoring method can accurately perform an alarm and quickly perform an after-the-fact retrieval.

According to an aspect of the present invention, a monitoring method is provided for monitoring a monitoring object, the monitoring method comprising the following steps: S10: when at least one sensing device detects a triggering event, generating a trigger flag corresponding to the triggering event and corresponding The triggering period and the triggering event name; S20: searching for all the camera devices in the range of the sensing device during the triggering period; S30: intercepting each of the camera devices found in step S20 within the triggering period a recorded monitoring video; S40: appending the trigger flag to each of the monitoring videos and saving; and S50: using at least one trigger flag and/or a trigger event name as a search condition, and the plurality of obtained trigger tags and / or a monitoring video that triggers the event name.

Preferably, when the plurality of sensing devices detect the triggering event in the step S10, after the step S40 is completed, the step S50 further includes the following steps: determining the corresponding trigger event generated in the step S10. Whether the results of the triggering flags in the order of the triggering time are consistent with the first sequence; if yes, the monitoring video recorded by each of the camera devices in the step S30 during the triggering period is automatically performed according to the triggered time. The sequential splicing forms a whole process video of a risk event; wherein, the same sensing device that detects the triggering event is spliced to the risk by a plurality of monitoring videos recorded by the camera device covering the sensing device by multiple imaging ranges The entire screen of the event is displayed in the same time period.

According to another aspect of the present invention, a monitoring apparatus is further provided, the monitoring apparatus comprising: a mark generating module, configured to generate a trigger flag corresponding to a trigger event and a corresponding trigger when at least one sensing device detects a trigger event a time segment and a trigger event name; a search module for finding all camera devices that monitor the range of the sensing device during the triggering period; and a video intercepting module for intercepting each of the camera devices found a monitoring video recorded during a triggering period; a tag adding module for appending the trigger tag to each of the monitoring videos and saving; and a retrieval module for at least one trigger tag and/or a trigger event name As a search condition, a plurality of obtained monitoring videos having the trigger flag and/or the name of the trigger event are retrieved.

According to the present invention, there is also provided a monitoring system comprising at least one sensing device and an imaging device and the monitoring device described above.

Compared with the prior art, the monitoring method, the monitoring device, and the monitoring system provided by the embodiment of the present invention generate a trigger flag corresponding to the trigger event when the sensing device detects that the trigger event occurs, and attach the trigger flag to the trigger event. The recorded surveillance video, therefore, has at least the following beneficial effects:

1. During the monitoring process, when a specific trigger mark is generated, timely and accurate alarm can be performed;

2. During the process of post-mortem retrieval after the trigger event occurs, the monitoring event video of the corresponding trigger event can be efficiently and conveniently found by inputting the event trigger flag, and the scene at the time when the trigger event occurs is clearly restored;

3. A wide range of events that can be marked;

4. The marking method is convenient and easy to identify and retrieve;

5. It is not necessary to modify the existing camera device or the sensing device or only need to upgrade the compatibility of the corresponding control system. Therefore, the cost of implementing the monitoring method is low.

In order to better understand the above and other aspects of the present invention, the following detailed description of the embodiments and the accompanying drawings

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be embodied in a variety of forms and should not be construed as being limited to the embodiments set forth herein. Those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and a repetitive description thereof will be omitted.

Referring to Figure 1, there is shown a flow chart of a monitoring method of one embodiment of the present invention. It should be noted that the monitoring method of the present invention can be applied to monitoring monitored objects. Wherein, in terms of monitoring objects, the monitoring method of the present invention can be applied to a small item or to an area having a large area, for example, the house can include a yard, a living room, a bedroom, and the like. In the process of monitoring a large area, the entire area can also be divided into a plurality of different small areas for monitoring, that is, as the above-mentioned residential monitoring, the entire residential monitoring can be divided into yard monitoring. Living room monitoring and bedroom monitoring. Specifically, as shown in FIG. 1, in the embodiment of the present invention, the monitoring method includes the following steps:

Step S10: When at least one sensing device detects the trigger event, generate a trigger flag corresponding to the trigger event and a corresponding trigger time period and a trigger event name. The triggering signal sent by the sensing device disposed in the monitoring range of the monitoring object is triggered to determine that the sensing device has detected the triggering event. In an embodiment of the invention, the area in which the object is monitored includes an inductive system composed of a plurality of sensing devices and an imaging system composed of a plurality of imaging devices. For example, the anti-theft monitoring of a house may include an inductive device installed in an electronic fence around the yard, an inductive device installed in the house security door, an inductive device installed in the window, and the like. The sensing device may be a light sensing device, a sound sensing device, an infrared sensing device, etc., and some of the sensors may also have an identification function, for example, the sound sensing device may have a voice recognition function. The trigger signal is a signal generated when a trigger event induced by the sensing device occurs, for example, an electronic fence disposed around the yard. When the sensor senses that the tension value of the electronic fence reaches a threshold, a corresponding trigger signal is issued. Further, the monitoring device that implements the monitoring method of the present invention receives a trigger signal to the sensor.

On the basis of obtaining the trigger signal sent by the sensing device, the monitoring system generates a corresponding trigger flag according to the specific trigger signal content, in other words, the trigger event for the trigger signal is marked with a specific mark. In an embodiment of the invention, the trigger tag includes an object tag and an event tag. The object tag is used to indicate a monitoring object corresponding to the sensing device that detects the triggering event (eg, façade monitoring), and the event tag is used to indicate the type of sensing event triggered by the sensing device that detected the triggering event. The object tag and the event tag may be represented by different letters. For example, the object tag may be represented by an uppercase English letter, the event tag may be represented by a lowercase English letter, or both may be represented by different uppercase English letters. Or the object tag and the event tag can be represented using a pattern combined with a color. The following is an example of some trigger flags generated based on trigger events detected by the sensing device. Table 1

As shown in Table 1, it shows the definition of the object mark and the event mark in the trigger mark. In the case of the monitoring of the house, the monitoring of the whole house is divided into different area monitoring and monitoring of specific items. The monitoring object is divided into four monitoring objects, which have different object markings, and each sensing object can be set in a plurality of sensing devices within the monitoring range, and the plurality of sensing devices emit corresponding triggers according to the sensing event. Signals, different trigger signals correspond to different event markers. Therefore, when a sensing device sends a trigger signal, it can be combined with the sensing object and the sensing event to generate a specific trigger mark pair to define. Further, on the basis of the above Table 1, the definition of the trigger flag will be described in conjunction with Table 2 below. Table 2

Table 2 shows the trigger flag trigger time and the manner in which the trigger event name is generated in combination with the object tag and the event tag in Table 1. Table 2 shows an example of a trigger flag generated by a trigger signal generated by each sensing device during monitoring of burglary in a house. As shown in Table 2, according to the definition of the object mark and the event mark in Table 1 above, in the monitoring process of burglary, Y in the YF means that the monitored object is the yard, and F is expressed as the fence detection abnormality - the wall is turned over. Therefore, it can be seen that the sensing device is a wall sensing device, and further, the triggering event represented by the trigger flag YF is that someone turns over the wall into the yard. Similarly, the triggering event represented by the triggering flag KP is that someone enters the living room from the window; the triggering event represented by the triggering flag HO is that someone enters the bedroom in an abnormal manner (ie, by means of a normal opening without a key, etc.); The trigger event is opened for the box to be destroyed. Each inductive event is defined by the manner in which the above-mentioned trigger flag is generated.

Step S20: Find all the imaging devices that monitor the range of the sensing device during the triggering period, such as all the imaging devices that are used to find the sensing device that detects the triggering event. The imaging device may include an imaging system composed of a plurality of imaging devices, and the anti-theft monitoring of a house may include an imaging device disposed in the yard, the living room, and each room, and the imaging device may be provided with an image recognition function. Device. Furthermore, for a sensing device that detects a triggering event, in this step, it is an imaging device that looks for all the pictures that can be detected when the sensing device detects a triggering event.

Further, in some embodiments of the present invention, the camera device may be a fixed camera, and the step S10 further includes pre-storing the correspondence between the fixed camera and the at least one sensing device, that is, the position of each sensing device is at least one. Within the imaging range of the imaging device, the position of the sensing device can be determined to determine the position of the imaging device that covers the sensing device. Wherein, the sensing device appears in the screen of the camera corresponding to the sensing device.

In other embodiments of the present invention, the surface of each sensing device may have a graphic two-dimensional code (which may also be other identification marks such as a bar code, etc.), and the camera device is a movable camera or a rotatable camera. . Wherein, during the process of moving or rotating, the camera needs to ensure that the sensing device is always within its imaging range, or when there are multiple cameras, each sensing device appears at least within the imaging range of at least one camera. The camera device monitors the current picture in real time, and recognizes the graphic two-dimensional code included in the picture, thereby establishing a temporary correspondence relationship between the time and the sensing device corresponding to the graphic two-dimensional code.

In an optional embodiment of the present invention, after the step S20 is completed, the method further includes the following steps:

Determining whether the trigger flag is a risk event trigger flag. Among them, the risk event trigger mark is a mark of an event that adversely affects the owner or manager of the monitored object or the monitored object. For example, the trigger flags in Table 2 above may be preset as risk event trigger flags.

If the result of the above determination is affirmative, the found imaging range is covered by the sensing device that detects the trigger event and the position information of the corresponding camera device for alarm. Wherein, the location information of the above camera device can be accurately positioned by relevant management personnel to timely stop the further development of risk events. The above alarms can be various. For example, when a risk event involves public safety or private security crimes (such as the above-mentioned burglary), the alarm can be made by connecting to the public security network; or some personal privacy incidents are also involved. It can be just to inform the relevant manager.

Step S30: The monitoring video recorded by each of the camera devices found in step S20 during the triggering period is intercepted. The duration of the intercepted monitoring time covers at least the monitoring period, for example 5 minutes, 10 minutes, 15 minutes or 20 minutes. Since the sensing device that detects the triggering event can be covered by the monitoring range of the plurality of camera devices, the search object is all the monitoring videos captured by all the camera devices during the triggering period, in other words, acquired. The monitoring video can be multiple.

Step S40: appending the trigger flag to each of the monitoring videos and saving. Specifically, the event trigger flag generated in the above step S10 is added to the monitoring video intercepted in the above step S30. Please refer to FIG. 2 to FIG. 4 together, which respectively show a flowchart of each step of adding a trigger flag to the monitoring video in the monitoring method of one embodiment of the present invention, and a monitoring screen in each step of the additional trigger flag. schematic diagram. As shown in FIG. 2, the step S40 includes the following steps:

Step S401: setting a search identification area in the display screen of the monitoring video recorded in the triggering period. Take the case where the triggering device at the fence of the yard detects the occurrence of the triggering event. Figures 3 and 4 show the monitoring screen recorded by the camera device covering the sensing device when the triggering event occurs. The display screen of the video is provided with a search identification area 1 in the area where the dotted line frame in the upper left corner is located.

Further, step S402 is performed: the trigger mark is superimposed on the search recognition area 1 in the form of a floating window. As shown in Fig. 4, since the sensing event is that someone has turned over the wall into the yard, combined with the event triggering flag exemplified in the above table, YF can be used as a triggering flag of the triggering event, and the YF mark is superimposed in the form of a floating window. The search recognition area 1 of the video display screen is monitored (as shown in the upper left corners of FIGS. 3 and 4). Among them, the floating window displayed by the YF mark preferably has a high transparency, thereby avoiding influence on the display screen of the surveillance video. For example, the transparency can be 50% to 70%.

It should be further noted that, because the monitoring video acquired in the foregoing step S30 may be multiple, in this step, all trigger tags generated according to the trigger event are respectively attached to all corresponding monitoring videos. , generate multiple surveillance videos.

Step S50: using the at least one trigger flag and/or the trigger event name as the search condition, and obtaining a plurality of monitoring videos having the trigger flag and/or the trigger event name. The user can input the trigger flag of the trigger event to be searched and/or the trigger event name and the corresponding search command to the monitoring device, and further, when the monitoring device receives the event trigger flag and the corresponding search command, search for the trigger flag according to the trigger flag. The monitoring video corresponding to the trigger event. Since the manner in which the trigger flag is attached to the monitoring video is superimposed on the search recognition area of the monitoring screen, the event trigger flag input by the user can be found by performing image recognition on the trigger mark of the search identification area. A monitoring video of the corresponding trigger event.

Further, in a preferred embodiment of the present invention, when the plurality of sensing devices detect the triggering event in the step S10, the step S40 is completed, and before the step S50, the following steps are further included:

It is judged whether the results of the respective trigger flags corresponding to each trigger event generated in the step S10 are arranged in the order of the trigger time in accordance with the first sequence.

If yes, the monitoring video recorded in the triggering time period of each camera device intercepted in the step S30 is automatically spliced according to the triggered time to form a risk event full-process video. The plurality of monitoring videos recorded by the imaging device that detects the triggering event by the plurality of imaging ranges covering the sensing device are spliced into the display screen of the same time period in the whole process video of the risk event. Inside.

Taking the above-mentioned residential monitoring and the triggering flag in the table as an example, if the first sequence is YFKPHOBD, it is determined whether the result of the triggering time of each trigger flag in the monitoring range (the entire house) according to the triggering time of the triggering event is the above YFKPHOBD. If the result of the determination is yes, all the video cameras recorded in each of the captured devices are automatically spliced in sequence according to the time of occurrence to form a whole process video of the risk event, that is, according to Table 2 above. The monitoring video captured by the cameras 3, 4, and 5 corresponding to the trigger flag YF and the monitoring video captured by the camera No. 2 corresponding to the trigger flag KP and the trigger flag HO corresponding to the trigger event YF are sequentially selected. The surveillance video captured by the cameras No. 8, No. 10 and the surveillance video captured by the cameras No. 7 and No. 9 corresponding to the trigger mark BD are spliced. The monitoring video captured by the cameras 3, 4, and 5 at the same trigger event may be zoomed and spliced into one display screen (ie, split screen display in one display screen); similarly, 1, 8, and 10 The surveillance video captured by the camera can be zoomed and spliced into one display. The surveillance video captured by cameras 7 and 9 can be zoomed and spliced into one display. The video formed after the final splicing is the whole process video of the risk event. The whole process video of the risk event completely records the whole process of burglary of the monitored house.

Further, in another embodiment of the present invention, in the step S50, adding the event trigger flag to the monitoring video recorded in the first time period when the sensing event is triggered may also be implemented by the following steps:

The trigger mark is combined with the device number of the camera device and the occurrence time of the trigger event to name the monitoring video of the trigger event. If the trigger is marked as non-editable, the trigger tag must also be converted to editable text. When the object mark and the event mark use a trigger mark such as a pattern to combine colors, the pattern or color is converted into an editable text such as a letter or a digit. It should be noted that, in the above embodiment, the event trigger flag indicating the object tag and the event tag in an editable English alphabet does not need to be converted. Further, the recorded video of the trigger event is named with the trigger flag in conjunction with the device number of the camera and the trigger period. Combine Table 2 and Table 3: Table 3

Table 3 shows the file names of the surveillance video files corresponding to the respective event trigger flags in Table 2 above. As shown in Table 3, the event trigger flag YF is taken as an example, that is, when the wall sensing device triggers the sensing event, the monitoring video file recorded by the camera No. 3 is named YF03-20170303232050. Among them, YF is the trigger mark in the file name; 03 is the device number of the camera; 20170303 is the shooting date of the surveillance video; 232050 is the specific time of the surveillance video shooting.

Further, in the step S50, a monitoring video of a trigger event corresponding to the trigger flag is searched for by the trigger flag. For example, if you directly input YF, you can find three surveillance video files named as YF03-20170303232050, YF04-20170303232050, and YF05-20170303232050 in Table 3 above; you can also quickly input the above three surveillance video files according to YF. The content of the sensing event is defined. For example, since the sensing event corresponding to YF in Table 3 above is “someone turns over the wall into the yard”, the above files can be named as YF03-20170303232050, YF04-20170303232050, and YF05-20170303232050. The surveillance video file is defined as a flip-flop event trigger video. Further, in some embodiments of the present invention, the above three wall-over event triggering videos may also be filtered, and one or two monitoring video files of the three videos that can best reflect the triggering process of the wall-breaking event are selected.

Subsequent searches can be made easier by naming the surveillance video file of the trigger event with a trigger tag or by attaching a trigger tag to the search identification area of the monitor picture.

Further, in combination with the embodiments shown in FIGS. 1 to 4 above, the present invention is mainly applicable to the fields of anti-theft monitoring, specific person monitoring, and traffic violation monitoring of a house, and for the anti-theft monitoring of a house, The wall sensing device in the above embodiment may be a pressure sensing device for determining whether to trigger an inductive event by sensing a force change of the fence, and may be an infrared sensor for the door and window sensing device of the above embodiment. Device.

The monitoring method of the present invention can also be applied to the monitoring of specific people, for example, monitoring of suspects of some crimes. The monitoring object may be an area, such as an airport or a train station where the suspect is most likely to appear; the sensing device may be a face recognition device that recognizes the face of the suspect, and the suspect is recognized by the face. A trigger signal is issued when the device recognizes it. Alternatively, the sensing device may also be a GPS positioning device, which generates a trigger signal when a GPS signal is present in the monitoring range by sensing a communication device such as a suspect's mobile phone.

The monitoring method of the present invention can also be applied to the monitoring of traffic violations. Wherein, the monitoring object may be one or more road sections or intersections, and the sensing device is a ground sensing coil, and the local sensing coil senses that the time elapsed by the vehicle does not meet a predetermined value (for example, when the traffic signal is in a red light period) A trigger signal is issued.

Further, the present invention also provides a monitoring device. The monitoring device is used to implement the various steps of the above monitoring method. In the embodiment of the invention, the monitoring device at least includes: a mark generation module, a search module, a video capture module, a mark adding module, and a search module.

Specifically, the tag generation module is configured to generate a trigger flag corresponding to the trigger event and a corresponding trigger time period and a trigger event name when the at least one sensing device detects the trigger event. The search module is configured to find all camera devices that monitor the range of the sensing device during the triggering period. The video intercepting module is configured to intercept the monitored video recorded by each of the captured devices during the triggering period. A tag adding module is used to attach the trigger tag to each of the monitoring videos and save. The retrieval module is configured to retrieve the obtained plurality of monitoring videos having the trigger flag and/or the name of the trigger event by using the at least one trigger flag and/or the trigger event name as the search condition.

Further, the present invention also provides a monitoring system. The monitoring system includes at least one sensing device and one camera device and the monitoring device described above. In particular, please refer to Figure 5, which shows a schematic diagram of a monitoring system in accordance with one embodiment of the present invention. In the embodiment shown in FIG. 5, the monitoring system includes an inductive system 2 composed of a plurality of sensing devices, an imaging system 3 composed of a plurality of imaging devices, and the implementation of the first to fourth figures described above. Monitoring device 4 of the monitoring method. The monitoring device 4 is connected to the sensing system 2 and the camera system 3, respectively, wherein the connection may refer to a network connection that can implement data transmission, and details are not described herein.

In summary, the monitoring method, the monitoring device, and the monitoring system provided by the embodiment of the present invention generate a trigger flag corresponding to the trigger event when the sensing device detects that the trigger event occurs, and attach the trigger flag to the time when the trigger event occurs. In the surveillance video, therefore, at least have the following beneficial effects:

1. During the monitoring process, when a specific trigger mark is generated, timely and accurate alarm can be performed;

2. During the process of post-mortem retrieval after the trigger event occurs, the monitoring event video of the corresponding trigger event can be efficiently and conveniently found by inputting the event trigger flag, and the scene at the time when the trigger event occurs is clearly restored;

3. A wide range of events that can be marked;

4. The marking method is convenient and easy to identify and retrieve;

5. It is not necessary to modify the existing camera device or the sensing device or only need to upgrade the compatibility of the corresponding control system. Therefore, the cost of implementing the monitoring method is low.

In conclusion, the present invention has been disclosed in the above embodiments, but it is not intended to limit the present invention. A person skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

1‧‧‧Search identification area

2‧‧‧Induction system

3‧‧‧ camera system

4‧‧‧Monitor

S10, S20, S30, S40, S50, S401, S402‧‧‧ process steps

YF‧‧‧Trigger Mark

Other features, objects, and advantages of the present invention will become more apparent from the detailed description of the accompanying drawings. Figure. FIG. 2 is a flow chart showing the steps of attaching a trigger flag to a monitoring video in a monitoring method according to an embodiment of the present invention. FIG. 3 is a schematic diagram of a monitoring screen after setting a search identification area in a process of attaching a trigger flag to a monitoring video in a monitoring method according to an embodiment of the present invention. FIG. 4 is a schematic diagram of a monitoring screen after adding an event trigger flag in the monitoring method according to an embodiment of the present invention. Figure 5 is a schematic illustration of a monitoring system in accordance with one embodiment of the present invention.

Claims (10)

A method for monitoring a monitored object, comprising: S10: generating a trigger flag corresponding to a trigger event, a trigger time period, and a trigger event name when at least one sensing device detects a trigger event; S20: searching At least one camera device that triggers the range of the sensing device during the triggering period; S30: intercepting at least one monitoring video recorded by each camera device found in step S20 during the triggering period; S40 Adding the trigger flag and/or each of the trigger event names to the monitoring video and saving; and S50: using each of the trigger flag and/or each of the trigger event names as a search condition, and obtaining the trigger Marking and/or the monitoring video of the trigger event name. The method of claim 1, wherein the step S40 further comprises: setting a search identification area in a display screen of the monitoring video recorded in a first time period in which the triggering event occurs And superimposing the trigger mark of the trigger event in the form of a floating window in the search identification area; and in the step S50, performing the trigger flag of the trigger event of the search identification area Image recognition, finding the surveillance video of the trigger event corresponding to the trigger flag. The method of claim 1, wherein the step S40 includes: combining the trigger flag with a device number of the camera device and an occurrence time of the trigger event, for the trigger event The monitoring video is named. The method of claim 1, wherein the camera device is a fixed camera, and the step S10 further includes pre-storing a correspondence between the fixed camera and the at least one sensing device, the at least one sensing The device appears in a picture of the fixed camera that has a corresponding relationship with the at least one sensing device. The method of claim 1, wherein the surface of the at least one sensing device has a graphic two-dimensional code, and the camera device is a movable camera or a rotatable camera, and the camera device instantly monitors the current The screen identifies the graphic two-dimensional code included in the current picture, and establishes a temporary correspondence relationship between the triggering time period and the at least one sensing device corresponding to the graphic two-dimensional code. The method of claim 1, wherein when the plurality of sensing devices detect the triggering event in the step S10, the step S40 is completed and before the step S50, the method further comprises the following steps: Determining whether the result of the triggering time of each trigger flag corresponding to each trigger event generated in the step S10 is consistent with a first sequence; and if the sequential arrangement result conforms to the first sequence, then automatically The monitoring video recorded in the triggering period in step S30 is sequentially spliced according to the triggered time to form a risk event full-process video; wherein the sensing device that detects the triggering event is included The plurality of monitoring videos are synchronously spliced into the display screen of the triggering period in the whole process video of the risk event. The method of claim 1, wherein the step S30 further comprises the steps of: determining whether the trigger flag is a risk event trigger flag; and if the trigger flag is the risk event trigger flag And transmitting a searched image range to cover a location information of the at least one camera device of the at least one sensing device that detects the trigger event to perform an alarm. The method of claim 1, wherein the trigger mark comprises an object mark and an event mark, the object mark being used to indicate that the at least one sensing device that detects the trigger event corresponds to The monitoring object is used to indicate a type of sensing event triggered by the at least one sensing device that detects the triggering event. A monitoring device, comprising: a mark generating module, configured to generate a trigger mark corresponding to a trigger event and a corresponding trigger time period and a trigger event name when the at least one sensing device detects a trigger event; a module, configured to: at least one camera device that monitors a range of the at least one sensing device during the triggering period; a video intercepting module configured to intercept the at least one camera device that is found in the a monitoring video recorded during the triggering period; a mark adding module for appending the trigger flag and/or the trigger event name to the monitoring video and saving; and a retrieval module for The trigger flag and/or the trigger event name are used as a search condition to retrieve a monitored video having the trigger flag and/or the trigger event name. A monitoring system comprising at least one sensing device and a monitoring device as described in claim 9 of the patent application.