CN115273369A - Smart home security monitoring device and monitoring method - Google Patents

Abstract

The invention discloses an intelligent home security monitoring device and a monitoring method thereof, wherein the intelligent home security monitoring device comprises: the local end equipment is arranged at an entrance door, named by a building-unit-house number, and can detect and identify potential dangers and form a warning signal; the client equipment is in wireless communication connection with the local equipment, and can receive the warning signal of the local equipment and perform early warning operation; the server-side equipment is in wireless communication connection with the local-side equipment and the client-side equipment, and can receive the early warning signal of the client-side equipment and the warning signal of the local-side equipment and take measures. The invention can carry out face recognition and continuous action detection through the local end equipment, and when suspicious people or dangerous behaviors are detected, the local end equipment can form warning signals and send the warning signals to the client end equipment and the server end equipment, thereby preventing property loss or personal injury in time and carrying out early warning on potential dangers.

Description

Smart home security supervision device and supervision method thereof

technical field

The invention relates to the technical field of smart home, in particular to a smart home security monitoring device and a monitoring method thereof.

Background technique

In modern life, people pay more and more attention to their own life and property safety. At present, residents generally install surveillance cameras inside and outside the house to monitor real-time scenes inside and outside the house. If an accident is found, they can find clues and evidence based on the stored video. However, only relying on camera monitoring requires the owner of the house to pay attention to the camera video at all times in order to detect dangerous events in time and call the police manually. The police will then carry out rescue according to the description of the caller. It will take a long time in the middle. If it is an emergency, even It will delay the best rescue time and cause irreversible consequences.

This kind of home security system is passive and post-verification type (with hysteresis). It mainly checks video records to find clues and evidence after a problem occurs, and cannot prevent property loss and personal injury in advance.

Contents of the invention

The technical problem to be solved by the present invention is: to solve the technical problem that the home security system in the prior art has hysteresis. The invention provides a smart home security monitoring device and a monitoring method thereof, which can detect dangerous situations in time and immediately take measures to deal with them, without manually staring at the monitoring video in real time, and can provide early warning and reduce property losses and personal injuries of residents.

The technical solution adopted by the present invention to solve the technical problem is: a smart home security supervision device, including: a local end device, the local end device is installed at the entrance door, and the local end device is based on building-unit- Named by the house number, the local device can detect and identify potential dangers, and form a warning signal;

A client device, the client device is wirelessly connected to the local device, and the client device can receive the warning signal of the local device and perform an early warning operation;

A server device, the server device is connected to the local device in wireless communication, the server device is connected to the client device in wireless communication, the server device can receive the early warning signal of the client device and The warning signal of the local device and take measures.

As a result, face recognition and continuous motion detection can be carried out through the local device to identify strangers, deliberately disguised people and suspicious dangerous behaviors. When suspicious people or dangerous behaviors are detected, the local device can form a warning signal to send For client devices and server devices, timely prevent property loss or personal injury, and provide early warning of potential dangers.

Further, the local end device includes: a single-chip processor, a first communication module, an infrared camera, a microphone, and a proximity sensor, the first communication module is connected to the single-chip processor, and the infrared camera is connected to the single-chip processor The microphone is connected with the single-chip processor for capturing images of people; the microphone is connected with the single-chip processor for receiving and playing voice signals; the proximity sensor is connected with the single-chip processor for detecting whether there is a person approaching.

Further, the local device further includes: a database, which includes a face database and a voice database.

Further, the single-chip processor includes: a face recognition module, a continuous motion detection module and a voice recognition module, the face recognition module is connected to the infrared camera, the continuous motion detection module is connected to the infrared camera, The speech recognition module is connected with the microphone.

The present invention also provides a smart home security monitoring method, using the above-mentioned smart home security monitoring device, the method includes the following steps:

S1. Real-time monitoring of the environmental conditions at the entrance door through the local device, when a potential danger is detected and identified, the local device generates a warning signal and sends it to the client device and the server device;

S2. After receiving the warning signal, the client device executes a corresponding warning operation;

S3. After receiving the warning signal, the server device can take measures to control the scene.

Further, in step S1, the local device monitors the environmental conditions at the entrance door in real time, specifically including:

The single-chip processor, infrared camera and microphone are in the dormant state by default. When the proximity sensor senses that someone is approaching the entrance door, the single-chip processor, infrared camera and microphone are awakened and enter the working state;

The infrared camera captures the video image of the person and transmits it to the single-chip processor for face recognition and continuous motion detection;

The microphone captures on-site voice signals and transmits them to the single-chip processor for voice recognition.

Further, the process of face recognition includes the following steps:

The single-chip processor extracts the facial features in the video image, and compares the extracted facial features with the facial database in the database;

If the comparison is successful, no processing will be done;

If the comparison fails, it shows that the facial feature is a stranger. At this time, if the stranger stays at the entrance door for more than 30 seconds, the single-chip processor sends a warning signal to the client device and the server device.

Further, the continuous motion detection process specifically includes:

The single-chip processor detects whether there is a dangerous behavior in the video image,

If there is no dangerous behavior, no action will be taken;

If there is a dangerous behavior, judge the level of the dangerous behavior; if the level of the dangerous behavior is high, the single-chip processor sends a warning signal to the client device and the server device at the same time; Sounds audible alerts and alerts client devices.

Further, the level of the risky behavior is defined as:

The behavior of looking around is defined as a low-level dangerous behavior,

The behavior of repeatedly trying to open the door lock is defined as a high-level dangerous behavior,

The behavior of violently destroying the entrance door is defined as a high-level dangerous behavior.

Behaviors with physical conflicts are defined as high-level dangerous behaviors,

The behavior of violently breaking into the residence is defined as a high-level dangerous behavior.

Further, the speech recognition process includes: the microphone collects voice data and transmits it to the single-chip processor, and the single-chip processor identifies whether the voice data contains distress and threat language, and if it recognizes that there is distress or threat language, then the single-chip microcomputer processes The device sends an alert signal to the server device.

The beneficial effect of the present invention is that the present invention monitors the situation inside and outside the house through the local device in real time, and when a dangerous or suspicious situation is found, the local device can send a warning signal to the client device and/or server device in time, and the client device can Early warning measures are taken in time, and the server equipment can timely dispatch police officers for on-site support. The present invention integrates early warning, real-time confirmation and real-time resource scheduling, and is highly real-time and preventive. It can detect security threats in time before or at the initial stage of an event that endangers property or personal safety, controls the threatening situation in its infancy, and avoids the situation from expanding. , become serious.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a structural block diagram of a smart home security supervision device of the present invention.

Fig. 2 is a structural block diagram of the local end device of the present invention.

Fig. 3 is a structural block diagram of the single-chip processor of the present invention.

Fig. 4 is a schematic diagram of the display content of the display device of the server of the present invention.

Fig. 5 is a flow chart of the smart home security supervision method of the present invention.

Fig. 6 is a schematic flow chart of face recognition in the present invention.

Fig. 7 is a schematic flow chart of continuous motion detection in the present invention.

Fig. 8 is a schematic flowchart of speech recognition in the present invention.

In the figure: 1. Local device; 2. Client device; 3. Server device; 11. Single-chip processor; 12. First communication module; 13. Infrared camera; 14. Microphone; 15. Proximity sensor; 111. Face recognition module; 112, continuous motion detection module; 113, voice recognition module.

Detailed ways

The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or element Must be in a particular orientation, be constructed in a particular orientation, and operate in a particular orientation, and therefore should not be construed as limiting the invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

As shown in Figure 1, the smart home security monitoring device of the present invention includes: a local device 1, a client device 2 and a server device 3, the local device 1 is installed at the entrance door, and the local device 1 is connected to the building. - Named by unit-house number, the local device 1 can detect and identify potential dangers, and form a warning signal; the client device 2 is connected to the local device 1 through wireless communication, and the client device 2 can receive the warning from the local device 1 signal and carry out early warning operation; the server device 3 is connected to the local device 1 through wireless communication, the server device 3 is connected to the client device 2 through wireless communication, and the server device 3 can receive the early warning signal from the client device 2 and the local device 1 warning signs and take action.

The present invention can perform face recognition and continuous motion detection through the local device 1 to identify strangers, deliberately disguised people and suspicious dangerous behaviors. When suspicious people or dangerous behaviors are detected, the local device 1 can form a warning signal Send it to the client device 2 and the server device 3 to prevent property loss or personal injury in time, and provide early warning of potential dangers.

As shown in Figures 2 to 3, the local device 1 includes: a single-chip processor 11, a first communication module 12, an infrared camera 13, a microphone 14 and a proximity sensor 15, the first communication module 12 is connected with the single-chip processor 11, and the infrared The camera 13 is connected with the single-chip processor 11 for capturing images of people; the microphone 14 is connected with the single-chip processor 11 for receiving and playing voice signals; the proximity sensor 15 is connected with the single-chip processor 11 for detecting whether people are approaching. The local device 1 is named after the building-unit-house number. When a potential danger is found, the client device 2 and the server device 3 can give an accurate early warning according to the device number corresponding to the warning signal. For example, the equipment number of 202 households in building 1 and unit 1 of a community can be set to 01010202, and the equipment number of 501 households in building 2 and unit 2 can be set to 02020501. In this way, in the same community, it can be located according to the number of local device 1 to specific households. The local device 1 can be installed outside the door and/or inside the door to monitor conditions inside and outside the house respectively. The local device 1 also includes a database 16, which includes a face database and a voice database. Single-chip processor 11 comprises face recognition module 111, continuous action detection module 112 and speech recognition module 113, and face recognition module 111 is connected with infrared camera 13, and continuous action detection module 112 is connected with infrared camera 13, and speech recognition module 113 is connected with microphone 14 connections.

The client device 2 may include a residential terminal and a guest terminal, and the registration information, authentication materials and permissions of the residential terminal and the guest terminal are different. The visitor terminal is mainly for non-proprietors, such as guests, tenants, takeaway personnel, couriers, cleaning personnel, security personnel, etc. The registration of visitors needs to upload photos and contact information, and use ID cards for real-name authentication. Visitors only have information registration permission. The resident terminal is mainly for the owner and his family. The registration of the resident needs to upload the household registration book, real estate certificate and personal photo, and use the ID card for mission authentication, fill in the contact number, and the resident has remote monitoring, user management, repair, alarm, and receive early warning. and permissions for preference settings. For example, when performing user management, residents can perform operations such as adding, deleting, modifying, and inquiring about family members and visitors; when the local device 2 or client device 2 fails, residents can report for repairs on the client device 2, And track the maintenance progress; when the local device 1 sends a warning signal to the client device 2, the resident can view the real-time video image on the client device 2 to know in time whether there is a possibility of property loss or personal injury. There are two possibilities, the resident can choose to alarm the server device 3 or perform an early warning operation; the preference setting of the resident includes the selection of warning words, and different warning words can be set in different scenarios. The client device 2 is, for example, a mobile phone, a tablet and other devices, which the resident carries with him and can receive warning information in a timely manner.

The server device 3 can be set in the community police room, and the server device 3 can communicate with the servers in the community police room, street police room, district police room, and city police room. The server communicates with the display device and buzzer. Connected, the display device can dynamically display the statistics of the local device 1 and the number of police officers in real time. The server of the community police office displays statistical data in units of districts, the server of the street police office displays statistical data in units of communities, and so on. The police office at the upper level has the right to view all the data information of the police office at the lower level, and the statistics are displayed in units of communities, and so on. The police office at the next level can view all the data and information of the police office at the next level. The functions of the police offices at all levels are different. The community police office is the main person responsible for security. In principle, when an early warning occurs, the community police office will handle it. Only when the situation is serious and the police force is insufficient, the real-time network will request to the superior. assist. When the server of the community police office receives an early warning, the buzzer will give an early warning, and the early warning camera on the display device will flash and display. is responded to. After the police office server receives the remote alarm, it can link to view the real-time video image of the alarm local device 1 according to the alarm information, and can make remote voice calls for warning and deterrent operations; the police office server can query the police execution Personnel distribution, online scheduling, and improved attendance efficiency. The police office server can count the number of failures of the local equipment 1, and perform online dispatch and progress query, and can check the maintenance tasks and current completion status of each employee online, so as to facilitate a reasonable division of labor according to the workload of each employee. For example, Figure 4 shows the display content of the display device in the community police room. Information such as the normal number and alarm number of the local device 1, the number of people on duty, and fault maintenance are clear at a glance.

In other words, the smart home security monitoring device of the present invention, by connecting the local device 1, the client device 2 and the server device 3 to the Internet, the local device 1 can monitor the situation inside and outside the house in real time, and report immediately if a potential danger is found For the client device 2 and the server device 3, take timely measures to stop dangerous behaviors and ensure the personal safety and property safety of residents.

As shown in Figure 5, the present invention also provides a smart home security monitoring method, using a smart home security monitoring device, the method includes the following steps:

S1. The local device 1 monitors the environment at the entrance door in real time. When a potential danger is detected and identified, the local device 1 generates a warning signal and sends it to the client device 2 and the server device 3 . S2. After receiving the warning signal, the client device 2 executes a corresponding warning operation. S3. After receiving the warning signal, the server device 3 can take measures to control the scene. In other words, the present invention monitors the situation inside and outside the house through the local device 1 in real time. If any suspicious situation or dangerous behavior is found, a warning signal is immediately sent to the client device 2 and the server device 3. If the danger level is low, the warning signal can be Only sent to the client device 2, the client device 2 deters suspicious persons through voice, if the danger level is high, the warning signal can be sent to the client device 2 and the server device 3 at the same time, the client device 2 can first make a voice to make a loud noise Stop it, the server device 2 can assign police officers to immediately go to the scene to check, and take control measures in time to reduce the personal injury and property loss of residents.

In step S1, the local device 1 monitors the environmental conditions at the entrance door in real time, specifically including: the single-chip processor 11, the infrared camera 13 and the microphone 14 are in a dormant state by default, and when the proximity sensor 15 senses that someone is approaching the entrance door , wake up the single-chip processor 11, the infrared camera 13 and the microphone 14, and enter the working state. The infrared camera 13 captures the video image of the person and transmits it to the single-chip processor 11 for face recognition and continuous motion detection. The microphone 14 captures the on-site voice signal and transmits it to the single-chip processor 11 for voice recognition.

As shown in Figure 6, the process of face recognition comprises the following steps: single-chip processor 11 extracts the face features in the video image, compares the face features extracted with the face storehouse in the database; if compared successfully, Then do not do any processing; If the comparison fails, it shows that the face feature is a stranger, at this time, if the stranger stays at the entrance door for more than 30 seconds, then the single-chip processor 11 sends a warning signal to the client device 2 and server device 3. For example, when someone enters the detection range of the infrared camera 13, the infrared camera 13 can capture the facial features of the person. If the feature extraction fails, and the person stays outside the door for more than 30 seconds, the single-chip processor 11 controls the microphone 14 to issue a voice warning and warns the client device 2 that there is a stranger staying at the door. The voice warning example is "Hello, I see Can't see your face, are you playing hide-and-seek? I want to inform the master to join together." If the face recognition module 111 extracts the face feature successfully, then the face feature of extraction is compared with the face database in the database, if the comparison is successful, it shows that the person is a resident or visitor; if the comparison fails, it shows that the person The person is a stranger. At this time, if the stranger stays outside the door for more than 30 seconds, the single-chip processor 11 controls the microphone 14 to issue a voice warning and warns the client device 2 that there is a stranger staying at the door. The voice warning example is "you Okay, I haven't seen you, what's the matter? I have notified the owner, he can see you." This voice warning tone is more friendly, but it contains a warning. The client device 2 can view the real-time video image after receiving the warning signal, and then process it according to the actual and real-time situation. The user can set the content of the voice warning in the client device 2 according to his preference.

As shown in Figure 7, the continuous motion detection process specifically includes: whether there is a dangerous behavior in the single-chip processor 11 detection video image, if there is no dangerous behavior, then do not do any processing; if there is a dangerous behavior, then judge the level of the dangerous behavior; If the level of dangerous behavior is high, then single-chip processor 11 sends warning signal to client device 2 and service end device 3 simultaneously; If the level of dangerous behavior is low, then single-chip processor 11 sends voice warning by microphone 14 and to client device 2 to issue a warning signal. For example, the level of dangerous behavior can be defined as follows: the behavior of "looking around" is defined as a low-level dangerous behavior, the behavior of "repeated attempts to open the door lock" is defined as a high-level dangerous behavior, and the behavior of "violent destruction of the door" is defined as a high-level dangerous behavior. ” is defined as a high-level dangerous behavior, the behavior of “physical conflict” is defined as a high-level dangerous behavior, and the behavior of “violent entry into the residence” is defined as a high-level dangerous behavior. For example, when someone enters the detection range of the infrared camera 13, the continuous motion detection module 112 of the single-chip processor 11 carries out video image detection with 30 seconds as a cycle, and detects the continuous motion of the person. If the continuous motion detection module 112 detects five If there is at least one of the dangerous behaviors, different levels of treatment will be carried out according to the level of the dangerous behavior. For example, when a low-level dangerous behavior is detected, the single-chip processor 11 sends a voice warning and sends a warning message to the client device 2. After the client device 2 receives the warning message, it can immediately view the real-time video image. The situation is dealt with. When a high-level dangerous behavior is detected, the single-chip processor 11 sends a warning signal to the client device 2 and the server device 3 at the same time, and the client device 2 and the server device 3 can view real-time video images after receiving the warning signal According to the on-site situation, the server device 3 can also remotely control the microphone 14 to perform voice warning and deterrence, and stop dangerous behaviors in time.

As shown in Figure 8, the process of speech recognition comprises: microphone 14 collects speech data and transmits to single-chip processor 11, whether the speech recognition module 113 recognition voice data of single-chip processor 11 contains distress and threat language, if recognizes that there is a distress call or threatening language, the single-chip processor 11 sends a warning signal to the server device 3 . For example, distress calls and threatening voices may include: "Help me", "Help me", etc. After the server device 3 receives the warning signal, it will immediately view the real-time video image and locate the location of the alarming local device 1. Timely dispatch police staff to the scene for rescue.

To sum up, the smart home security monitoring device and its monitoring method of the present invention monitor the situation inside and outside the house through the local device 1 in real time, and when dangerous or suspicious situations are found, the local device 1 can send a warning signal to the client device in time 2 and/or the server device 3, the client device 2 can take early warning measures in time, and the server device 3 can timely dispatch police officers for on-site support. The smart home security monitoring device of the present invention is a highly real-time and preventive security monitoring device that integrates early warning, live confirmation, and real-time resource scheduling. Threats, control the threatening situation in the embryonic stage, and avoid the situation from expanding and becoming serious.

Inspired by the above-mentioned ideal embodiment according to the present invention, through the above-mentioned description content, relevant workers can make various changes and modifications within the scope of not departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, but must be determined according to the scope of the claims.

Claims (10)

1. The utility model provides an intelligent home security supervision device which characterized in that includes:

the system comprises local end equipment (1), wherein the local end equipment (1) is installed at an entrance door, the local end equipment (1) is named by a building-unit-house number, and the local end equipment (1) can detect and identify potential dangers and form warning signals;

the client device (2) is in wireless communication connection with the local device (1), and the client device (2) can receive the warning signal of the local device (1) and perform early warning operation;

the server side equipment (3) is in wireless communication connection with the local side equipment (1), the server side equipment (3) is in wireless communication connection with the client side equipment (2), and the server side equipment (3) can receive the early warning signal of the client side equipment (2) and the warning signal of the local side equipment (1) and take measures.

2. The intelligent home security supervision apparatus according to claim 1, wherein the local device (1) comprises: the system comprises a singlechip processor (11), a first communication module (12), an infrared camera (13), a microphone (14) and a proximity sensor (15), wherein the first communication module (12) is connected with the singlechip processor (11), and the infrared camera (13) is connected with the singlechip processor (11) and used for capturing images of people; the microphone (14) is connected with the singlechip processor (11) and is used for receiving and playing voice signals; the proximity sensor (15) is connected with the single chip microcomputer processor (11) and used for detecting whether a person approaches the proximity sensor.

3. The intelligent home security supervision apparatus according to claim 2, wherein the local device (1) further comprises: a database (16), wherein the database (16) comprises a face database and a voice database.

4. The intelligent home security supervision device according to claim 2, wherein the single-chip processor (11) comprises: face identification module (111), continuous action detection module (112) and speech recognition module (113), face identification module (111) with infrared camera (13) are connected, continuous action detection module (112) with infrared camera (13) are connected, speech recognition module (113) with microphone (14) are connected.

5. An intelligent home security supervision method, which is characterized in that the intelligent home security supervision device according to any one of claims 1-4 is adopted, and the method comprises the following steps:

s1, monitoring the environmental condition of an entrance door in real time through local end equipment (1), and when potential danger is detected and identified, generating a warning signal by the local end equipment (1) and sending the warning signal to client equipment (2) and server equipment (3);

s2, after the client equipment (2) receives the warning signal, corresponding early warning operation is executed;

and S3, after the server side equipment (3) receives the warning signal, measures can be taken to manage and control the site.

6. The intelligent home security supervision method according to claim 5, wherein in step S1, the local device (1) monitors the environmental conditions at the entrance door in real time, and specifically comprises:

the single chip microcomputer processor (11), the infrared camera (13) and the microphone (14) are in a dormant state by default, and when the proximity sensor (15) senses that a person approaches the entrance door, the single chip microcomputer processor (11), the infrared camera (13) and the microphone (14) are waken up to enter a working state;

the infrared camera (13) captures a video image of a person and transmits the video image to the single chip microcomputer processor (11) for face recognition and continuous motion detection;

and the microphone (14) captures a field voice signal and transmits the voice signal to the singlechip processor (11) for voice recognition.

7. The intelligent home security supervision method according to claim 6, wherein the face recognition process comprises the following steps:

the single chip microcomputer processor (11) extracts the face features in the video image and compares the extracted face features with a face library in a database;

if the comparison is successful, no treatment is carried out;

if the comparison fails, the human face features are indicated as strangers, and at the moment, if the strangers stay at the entrance door for more than 30 seconds, the single-chip processor (11) sends warning signals to the client equipment (2) and the server equipment (3).

8. The intelligent home security supervision method according to claim 6, wherein the continuous action detection process specifically comprises the following steps:

the singlechip processor (11) detects whether dangerous behaviors exist in the video image,

if no dangerous behaviors exist, no treatment is carried out;

if dangerous behaviors exist, judging the level of the dangerous behaviors; if the level of the dangerous behaviors is high, the single chip microcomputer processor (11) sends out warning signals to the client device (2) and the server device (3) at the same time; if the dangerous behavior is low in level, the singlechip microcomputer processor (11) sends out voice warning through the microphone (14) and sends out a warning signal to the client equipment (2).

9. The intelligent home security supervision method according to claim 8, wherein the level of the dangerous behavior is defined as:

left-right looking behavior is defined as low-level dangerous behavior,

the behavior of multiple attempts to open the entry lock is defined as high-level dangerous behavior,

the act of violently breaking the entry is defined as a high level of dangerous act,

a behavior with limb conflict is defined as a high-level dangerous behavior,

the act of breaking down violence into the residence is defined as a high level of dangerous activity.

10. The intelligent home security supervision method according to claim 6, wherein the voice recognition process comprises: the microphone (14) collects voice data and transmits the voice data to the single chip microcomputer processor (11), the single chip microcomputer processor (11) identifies whether the voice data contain a help seeking language or a threat language, and if the help seeking language or the threat language is identified, the single chip microcomputer processor (11) sends an alarm signal to the server side equipment (3).

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