A method for implementing an indoor fire monitoring linkage system

Abstract

The application discloses a kind of methods for realizing indoor fire monitoring linkage system, comprising: adjustment module, data transmission module and detection module;It is related to fire alarm technical field, the technical problem of slow response speed, reliability and stability of linkage alarm system of prior art is solved;The present application generates wake-up preamble based on equipment ID number and preset preamble sequence, and the detection equipment is programmed networking based on wake-up preamble;Through the transmission power optimization signal of adjustment module, the transmission power of detection equipment is adjusted;Detection equipment with the same wake-up preamble, communication rate and communication channel are classified into the same LAN, since detection equipment in the same LAN can be interlinked alarm, thus reducing the communication link between detection equipment, it is beneficial to improve the response speed, reliability and stability of fire monitoring linkage system, it is beneficial to reduce the communication power consumption between detection equipment and improve the service life of battery.

Description

Technical Field

[0001] This invention belongs to the field of fire alarm technology, specifically a method for implementing an indoor fire monitoring and linkage system. Background Technology

[0002] In recent years, with the rapid development of science and technology and the continuous advancement of urbanization, the increasing density of urban buildings has made fire safety a particularly important issue. Fire accidents not only cause enormous property damage but also seriously threaten people's lives. Therefore, timely and accurate monitoring and early warning of fires has become an urgent problem to be solved in the field of public safety.

[0003] The prior art (invention patent with publication number CN103400468B) discloses a linkage smoke alarm system and linkage alarm control method, including a control terminal and multiple smoke sensing terminals, wherein the alarm control unit sends an alarm control signal to the selected smoke sensing terminal; however, this method requires a lot of communication link links, resulting in low reliability and stability of the linkage alarm system, and also slowing down the response speed.

[0004] This invention provides a method for implementing an indoor fire monitoring and linkage system to solve the above-mentioned technical problems. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art; to this end, the present invention proposes a method for realizing an indoor fire monitoring linkage system, which is used to solve the technical problems of slow response speed, low reliability and stability of the linkage alarm system in the prior art.

[0006] To achieve the above objectives, a first aspect of the present invention provides an indoor fire monitoring and linkage system, comprising: an adjustment module, a data transmission module, and a detection module; wherein the detection module is communicatively connected to the adjustment module and the data transmission module respectively.

[0007] The detection module consists of several detection devices, including an audible and visual alarm, a wireless communication module, a combustible gas sensor, and / or a smoke sensor.

[0008] The detection module is used to acquire the smoke concentration and combustible gas concentration in the detection area; and,

[0009] The operating status of the audible and visual alarm is controlled based on the smoke concentration and combustible gas concentration; the operating status includes off, first warning signal and / or second warning signal;

[0010] The adjustment module: generates a wake-up preamble based on the device ID and a preset preamble sequence; sends programming data to the detection device; programs and networks the detection device based on the wake-up preamble to obtain several local area networks (LANs); and reinitializes and configures the wireless communication modules of the detection devices within the LANs; wherein the device ID includes a batch number and a serial number, the preset preamble sequence is a sequence composed of the generated wake-up preambles, and the programming data includes the wake-up preamble, the device serial number, and the status data period; and,

[0011] Send a power optimization signal to the detection equipment within the local area network and adjust the transmission power of the detection equipment; wherein, the power optimization signal is a preset signal of the adjustment module;

[0012] The data transmission module is used to acquire the status data of the detection module and send relevant instructions to the adjustment module. The status data includes the battery voltage, smoke concentration, smoke temperature, combustible gas concentration, operating status of the smoke sensor and the operating status of the combustible gas sensor. The relevant instructions include remote silencing instructions and remote gas valve closing instructions, which are defined by the communication protocol.

[0013] It should be noted that each detection device has a unique device ID number, and detection devices located on the same local area network have the same wake-up preamble, communication rate, and communication channel.

[0014] Preferably, the first warning signal and the second warning signal are generated based on the concentration of combustible gas and the concentration of smoke, respectively.

[0015] It should be noted that the first warning signal and the second warning signal are significantly different. When the concentration of combustible gas exceeds the preset gas concentration threshold, the audible and visual alarm generates the first warning signal; when the smoke concentration exceeds the smoke concentration threshold, the audible and visual alarm generates the second warning signal.

[0016] Preferably, the step of generating a wake-up preamble based on the device ID number and a preset preamble sequence includes:

[0017] Z1: Divide the target region into several detection regions and mark them as detection regions Qi; where i = 1, 2, ..., n, and n is a positive integer;

[0018] Z2: Obtain the device ID number of all detection devices within the detection area Qi and the preset preamble sequence stored inside the adjustment module;

[0019] Z3: Obtain the serial number from the device ID number, compare the serial number with the numbers in the preset preamble sequence, and obtain the number of different numbers;

[0020] Z4: Mark the sequence number corresponding to the largest number of different numbers as the wake-up preamble, and add the wake-up preamble to the preset preamble sequence.

[0021] By extracting the device ID number and preset preamble sequence from the detection device information, the serial number is obtained based on the device ID number. The serial number corresponding to the highest number of different numbers is selected as the wake-up preamble and added to the preset preamble sequence. This ensures that the wake-up preambles of detection devices located in different detection areas are different, which helps to reduce signal interference between detection devices in different detection areas.

[0022] Preferably, the step of programming and networking the detection devices based on the wake-up preamble includes:

[0023] Extract the wake-up preamble from the detection devices, form a local area network (LAN) with detection devices that have the same wake-up preamble, communication rate, and communication channel, and label the LAN as Wi.

[0024] By networking detection devices with the same wake-up preamble, communication rate, and communication channel, the communication links between detection devices can be reduced, which is beneficial to improving the response speed, reliability, and stability of the fire monitoring linkage system, since the detection devices in the same local area network can link up and trigger alarms.

[0025] Preferably, the step of re-initializing and reconfiguring the wireless communication module of the detection device within the local area network includes:

[0026] Change the wake-up preamble of the detection device within the local area network (LAN) Wi, reinitialize and configure the wireless communication module of the detection device within the LAN Wi, and enable the detection device within the LAN Wi to start preamble detection according to a preset cycle. When status data is generated, it sends status data to the data transmission module.

[0027] Preferably, the step of transmitting the power optimization signal to the detection device within the local area network and adjusting the transmission power of the detection device includes:

[0028] The module sends power optimization signals to all detection devices within the local area network (Wi).

[0029] Adjustment data is sent in order of sequence number in the device ID of the detection device. The detection device with the smallest sequence number is marked as the transmitting device, and the remaining devices are marked as receiving devices. The receiving device reads the receiving sensitivity of the data packet based on the received data packet. The adjustment data includes the device ID number and transmission power of the transmitting device.

[0030] The power factor is obtained based on the receiving sensitivity. The receiving device returns the corresponding power factor to the transmitting device, and the transmitting device adjusts the transmission power according to the power factor.

[0031] Data is sent sequentially according to the serial number in the device ID, avoiding simultaneous data transmission by multiple detection devices and reducing signal interference caused by communication between detection devices. The receiving sensitivity of the detection device is obtained, and the power factor is calculated based on the receiving sensitivity. The transmitting device adjusts its transmission power according to the power factor, which helps reduce the communication power consumption of the detection device and improve battery life.

[0032] Preferably, obtaining the power factor based on the receiving sensitivity includes:

[0033] Extract the receiver sensitivity and match it with the receiver sensitivity range in the database to obtain the power factor; the database includes the mapping relationship between the receiver sensitivity range and the power factor.

[0034] A second aspect of the present invention provides a method for implementing indoor fire monitoring linkage, comprising:

[0035] S1: Environmental information is collected based on detection equipment; the environmental information includes smoke concentration and combustible gas concentration;

[0036] S2: Control the operating status of the audible and visual alarm based on environmental information; wherein the operating status includes off, first warning signal and / or second warning signal;

[0037] S3: Mark the detection device whose operating status is the first warning signal and / or the second warning signal as an alarm device;

[0038] S4: The alarm device generates several wake-up packets and several alarm instruction data packets and sends them to all detection devices in the local area network where the alarm device is located; wherein, the wake-up packet includes the wake-up preamble of the alarm device and the corresponding data packet sequence number, and the alarm instruction data packet includes the alarm instruction and the corresponding data packet sequence number;

[0039] S5: Based on wake-up packets and alarm command data packets, acquire linked alarm devices located on the same local area network as the alarm device;

[0040] S6: The alarm linkage device receives the alarm instruction data packet, parses it, and executes the alarm instruction in the alarm instruction data packet.

[0041] Preferably, the step of acquiring the linked alarm devices located on the same local area network as the alarm device based on the wake-up packet and alarm command data packet includes:

[0042] When the wake-up packet period overlaps with the preamble detection period, other detection devices in the same local area network are woken up, calculate the receiving window time for opening the alarm instruction data packet, receive the alarm instruction data packet and parse the alarm instruction, and determine whether the alarm device needs to be linked with other detection devices based on the alarm instruction; if yes, the other detection devices are marked as linked alarm devices; if no, the other detection devices are marked as non-linked alarm devices.

[0043] Preferably, the period of the wake-up packet in the preamble detection is greater than the sum of the preamble detection period and the sleep period.

[0044] Setting the wake-up packet period to be greater than the sum of the pre-detection period and the sleep period can improve the reliability of wake-up linkage alarm devices.

[0045] Compared with the prior art, the beneficial effects of the present invention are:

[0046] 1. This invention groups detection devices with the same wake-up preamble, communication rate, and communication channel into the same local area network. Since the detection devices in the same local area network can trigger alarms together, the communication links between the detection devices are reduced, which helps to improve the response speed, reliability, and stability of the fire monitoring and linkage system.

[0047] 2. This invention sends data sequentially according to the serial number in the device ID, avoiding simultaneous communication by multiple detection devices and reducing signal interference caused by communication between detection devices; it obtains the receiving sensitivity of the detection device, acquires the power factor based on the receiving sensitivity, and the transmitting device adjusts the transmission power according to the power factor, which helps reduce the power consumption of communication between detection devices and improve battery life. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a schematic diagram of the indoor fire monitoring and linkage system of the present invention;

[0050] Figure 2 This is a schematic diagram illustrating the principle of the leader detection of the present invention;

[0051] Figure 3 This is a flowchart illustrating the generation of the wake-up preamble in this invention;

[0052] Figure 4This is a flowchart illustrating the indoor fire monitoring and linkage method of the present invention. Detailed Implementation

[0053] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0054] Please see Figure 1-4 The first aspect of the present invention provides an indoor fire monitoring and linkage system, comprising: an adjustment module, a data transmission module, and a detection module; the detection module is communicatively connected to the adjustment module and the data transmission module respectively.

[0055] The detection module consists of several detection devices, including an audible and visual alarm, a wireless communication module, a combustible gas sensor, and / or a smoke sensor.

[0056] The detection module is used to acquire the smoke concentration and combustible gas concentration in the detection area; and,

[0057] The operating status of the audible and visual alarm is controlled based on the smoke concentration and combustible gas concentration; the operating status includes off, first warning signal and / or second warning signal;

[0058] Adjustment module: Generates a wake-up preamble based on the device ID and a preset preamble sequence; sends programming data to the detection device; programs and networks the detection device based on the wake-up preamble, resulting in several local area networks (LANs); reinitializes and configures the wireless communication modules of the detection devices within the LANs; wherein, the device ID includes batch and serial number, the preset preamble sequence is a sequence composed of the generated wake-up preambles, and the programming data includes the wake-up preamble, device serial number, and status data period; and,

[0059] Send a power optimization signal to the detection equipment within the local area network and adjust the transmission power of the detection equipment; wherein, the power optimization signal is a preset signal of the adjustment module;

[0060] Data transmission module: used to acquire status data of the detection module; send relevant instructions to the adjustment module; wherein, the status data includes the battery voltage of the smoke sensor, smoke concentration, smoke temperature, combustible gas concentration, operating status of the smoke sensor and the operating status of the combustible gas sensor, and the relevant instructions include remote silencing instructions and remote gas valve closing instructions, and the relevant instructions are defined by the communication protocol.

[0061] It should be noted that each detection device has a unique device ID number, and detection devices located on the same local area network have the same wake-up preamble, communication rate, and communication channel.

[0062] Furthermore, the first and second warning signals are generated based on the concentration of combustible gas and the concentration of smoke, respectively.

[0063] It should be noted that the first warning signal and the second warning signal are significantly different. When the concentration of combustible gas exceeds the preset gas concentration threshold, the audible and visual alarm generates the first warning signal; when the smoke concentration exceeds the smoke concentration threshold, the audible and visual alarm generates the second warning signal.

[0064] Furthermore, a wake-up preamble is generated based on the device ID number and a preset preamble sequence, including:

[0065] Z1: Divide the target region into several detection regions and mark them as detection regions Qi; where i = 1, 2, ..., n, and n is a positive integer;

[0066] Z2: Obtain the device ID number of all detection devices within the detection area Qi and the preset preamble sequence stored inside the adjustment module;

[0067] Z3: Obtain the serial number from the device ID number, compare the serial number with the numbers in the preset preamble sequence, and obtain the number of different numbers;

[0068] Z4: Mark the sequence number corresponding to the largest number of different numbers as the wake-up preamble, and add the wake-up preamble to the preset preamble sequence.

[0069] By extracting the device ID number and preset preamble sequence from the detection device information, the serial number is obtained based on the device ID number. The serial number corresponding to the highest number of different numbers is selected as the wake-up preamble and added to the preset preamble sequence. This ensures that the wake-up preambles of detection devices located in different detection areas are different, which helps to reduce signal interference between detection devices in different detection areas.

[0070] In this embodiment, the target area is divided into three detection areas and labeled as Q1, Q2, and Q3 respectively;

[0071] There are two testing devices in testing area Q1, labeled A and B respectively. Device ID number of A is 002023151234 and device ID number of B is 002023154567. The serial numbers extracted from the last 4 digits of device ID numbers of A and B are 1234 and 4567 respectively.

[0072] The preset preamble sequence is set to {2345}. Numbers 1234 and 4567 are compared with the preset preamble sequence {2345}. The results show that {2345} differs from number 1234 by 1 digit, and from number 4567 by 2 digits. Since number 4567 has the most digit differences, it is marked as the wake-up preamble and added to the preset preamble sequence. The preset preamble sequence is now {2345, 4567}.

[0073] Add the wake-up preamble 4567 to the programming data and manually input it into the adjustment device. Then, send the programming data to detection device A and detection device B through the adjustment device.

[0074] Furthermore, the detection equipment is programmed and networked based on the wake-up preamble, including:

[0075] Extract the wake-up preamble from the detection devices, form a local area network (LAN) with detection devices that have the same wake-up preamble, communication rate, and communication channel, and label the LAN as Wi.

[0076] For example, the communication rate and communication channel of detection device A and detection device B are set to be the same. Since the wake-up preamble of detection device A and detection device B are both 4567, detection device A and detection device B are formed into a local area network and the local area network is marked as W1.

[0077] By networking detection devices with the same wake-up preamble, communication rate, and communication channel, the communication links between detection devices can be reduced, which is beneficial to improving the response speed, reliability, and stability of the fire monitoring linkage system, since the detection devices in the same local area network can link up and trigger alarms.

[0078] For example, reinitializing and reconfiguring the wireless communication module of the detection device within the local area network includes:

[0079] Change the wake-up preamble of the detection devices in LAN W1, reinitialize and configure the wireless communication modules of the detection devices in LAN W1, and enable detection devices A and B in LAN W1 to start preamble detection according to a preset cycle and send status data to the data transmission module.

[0080] For example, sending a power optimization signal to a detection device within a local area network and adjusting the transmission power of the detection device includes:

[0081] Set the transmission power of detection device A to 20 dBm;

[0082] The adjustment module sends power optimization signals to detection devices A and B within the local area network W1. Adjustment data is sent in order according to the serial number in the device ID of the detection devices. Since the serial number of detection device A is 1234 and the serial number of detection device B is 4567, detection device A is marked as the transmitting device and detection device B is marked as the receiving device. The receiving sensitivity of the receiving device is set to -75dBm.

[0083] The power factor is 0.8 based on the receiver sensitivity of -75dBm. The receiver returns the corresponding power factor to the transmitter. The transmitter adjusts the transmit power to 20×0.8=16dBm based on the power factor of 0.8.

[0084] Data is sent sequentially according to the serial number in the device ID, avoiding simultaneous data transmission by multiple detection devices and reducing signal interference caused by communication between detection devices. The receiving sensitivity of the detection device is obtained, and the power factor is calculated based on the receiving sensitivity. The transmitting device adjusts its transmission power according to the power factor, which helps reduce the communication power consumption of the detection device and improve battery life.

[0085] Furthermore, the power factor is obtained based on the receiver sensitivity, including:

[0086] Extract the receiver sensitivity and match it with the receiver sensitivity range in the database to obtain the power factor; the database includes the mapping relationship between the receiver sensitivity range and the power factor.

[0087] For example, the mapping relationship between the receiving sensitivity range and the power factor in the database is {[(-40dBm,-60dBm),0.7],[(-60dBm,-80dBm),0.8],[(-80dBm,-100dBm),0.9]};

[0088] To make it easier to understand, let's take an example: (-60dBm, -80dBm) in the database represents the receiver sensitivity range, and 0.8 is the corresponding power factor.

[0089] A second aspect of the present invention provides a method for implementing indoor fire monitoring linkage, comprising:

[0090] S1: Environmental information is collected based on detection equipment; the environmental information includes smoke concentration and combustible gas concentration;

[0091] S2: Control the operating status of the audible and visual alarm based on environmental information; wherein the operating status includes off, first warning signal and / or second warning signal;

[0092] S3: Mark the detection device whose operating status is the first warning signal and / or the second warning signal as an alarm device;

[0093] S4: The alarm device generates several wake-up packets and several alarm instruction data packets and sends them to all detection devices in the local area network where the alarm device is located; wherein, the wake-up packet includes the wake-up preamble of the alarm device and the corresponding data packet sequence number, and the alarm instruction data packet includes the alarm instruction and the corresponding data packet sequence number;

[0094] S5: Based on wake-up packets and alarm command data packets, acquire linked alarm devices located on the same local area network as the alarm device;

[0095] S6: The alarm linkage device receives the alarm instruction data packet, parses it, and executes the alarm instruction in the alarm instruction data packet.

[0096] Furthermore, based on wake-up packets and alarm command data packets, the system acquires linked alarm devices located on the same local area network as the alarm device, including:

[0097] When the wake-up packet period overlaps with the preamble detection period, other detection devices in the same local area network are woken up, calculate the receiving window time for opening the alarm instruction data packet, receive the alarm instruction data packet and parse the alarm instruction, and determine whether the alarm device needs to be linked with other detection devices based on the alarm instruction; if yes, the other detection devices are marked as linked alarm devices; if no, the other detection devices are marked as non-linked alarm devices.

[0098] Furthermore, the period of the wake-up packet in the preamble detection is greater than the sum of the preamble detection period and the sleep period.

[0099] Setting the wake-up packet period to be greater than the sum of the pre-detection period and the sleep period can improve the reliability of wake-up linkage alarm devices.

[0100] Some of the data in the above formula are calculated by removing dimensions and taking their numerical values. The formula is the closest to the real situation obtained by software simulation of a large amount of collected data. The preset parameters and preset thresholds in the formula are set by those skilled in the art according to the actual situation or obtained through simulation of a large amount of data.

[0101] Working principle of the invention:

[0102] This invention generates a wake-up preamble based on the device ID and a preset preamble sequence, and programs and networks the detection devices based on the wake-up preamble. Detection devices with the same wake-up preamble, communication rate, and communication channel are grouped into a local area network (LAN). The transmission power of the detection devices is adjusted by sending a power optimization signal through an adjustment module. Environmental information, including smoke concentration and combustible gas concentration, is collected based on the detection devices. The operating status of the audible and visual alarms is controlled based on the environmental information, and detection devices operating at the first warning signal and / or second warning signal are marked as alarm devices. Several wake-up packets and several alarm command packets are sent by the alarm devices to the LAN area where they are located. Other detection devices located in the same LAN as the alarm devices are identified based on the wake-up packets and marked as linked alarm devices. The linked alarm devices receive alarm command packets, parse them, and execute the alarm commands carried in the alarm command packets.

[0103] The above embodiments are only used to illustrate the technical methods of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of the present invention without departing from the spirit and scope of the technical methods of the present invention.

Claims

1. A system for monitoring and linking indoor fires, characterized in that, include: The system includes an adjustment module, a data transmission module, and a detection module; the detection module is communicatively connected to the adjustment module and the data transmission module, respectively. The detection module consists of several detection devices, including an audible and visual alarm, a wireless communication module, a combustible gas sensor, and / or a smoke sensor. The detection module is used to acquire the smoke concentration and combustible gas concentration in the detection area; and, The operating status of the audible and visual alarm is controlled based on the smoke concentration and combustible gas concentration; the operating status includes off, first warning signal and / or second warning signal; The adjustment module: generates a wake-up preamble based on the device ID and a preset preamble sequence; sends programming data to the detection device; programs and networks the detection device based on the wake-up preamble to obtain several local area networks (LANs); and reinitializes and configures the wireless communication modules of the detection devices within the LANs; wherein the device ID includes a batch number and a serial number, the preset preamble sequence is a sequence composed of the generated wake-up preambles, and the programming data includes the wake-up preamble, the device serial number, and the status data period; and, Send a power optimization signal to the detection equipment within the local area network and adjust the transmission power of the detection equipment; wherein, the power optimization signal is a preset signal of the adjustment module; The data transmission module is used to acquire the status data of the detection module and send relevant instructions to the adjustment module. The status data includes the battery voltage, smoke concentration, smoke temperature, combustible gas concentration, operating status of the smoke sensor and the operating status of the combustible gas sensor. The relevant instructions include remote silencing instructions and remote gas valve closing instructions. The generation of the wake-up preamble based on the device ID and a preset preamble sequence includes: Z1: Divide the target region into several detection regions and mark them as detection regions Qi; where i=1,2,…n, and n is a positive integer; Z2: Obtain the device ID number of all detection devices within the detection area Qi and the preset preamble sequence stored inside the adjustment module; Z3: Obtain the serial number from the device ID number, compare the serial number with the numbers in the preset preamble sequence, and obtain the number of different numbers; Z4: Mark the sequence number corresponding to the largest number of different numbers as the wake-up preamble, and add the wake-up preamble to the preset preamble sequence; The process of transmitting the power optimization signal to the detection equipment within the local area network and adjusting the transmission power of the detection equipment includes: The module sends power optimization signals to all detection devices within the local area network (Wi). Adjustment data is sent in order of sequence number in the device ID of the detection device. The detection device with the smallest sequence number is marked as the transmitting device, and the remaining devices are marked as receiving devices. The receiving device reads the receiving sensitivity of the data packet based on the received data packet. The adjustment data includes the device ID number and transmission power of the transmitting device. The power factor is obtained based on the receiving sensitivity. The receiving device returns the corresponding power factor to the transmitting device, and the transmitting device adjusts the transmission power according to the power factor.

2. The indoor fire monitoring and linkage system according to claim 1, characterized in that, The first warning signal and the second warning signal are generated based on the concentration of combustible gas and the concentration of smoke, respectively.

3. The indoor fire monitoring and linkage system according to claim 2, characterized in that, The programming and networking of the detection devices based on the wake-up preamble includes: Extract the wake-up preamble from the detection devices, form a local area network (LAN) with detection devices that have the same wake-up preamble, communication rate, and communication channel, and label the LAN as Wi.

4. The indoor fire monitoring and linkage system according to claim 3, characterized in that, The step of re-initializing and reconfiguring the wireless communication module of the detection equipment within the local area network includes: Change the wake-up preamble of the detection device within the local area network (LAN) Wi, reinitialize and configure the wireless communication module of the detection device within the LAN Wi, and the detection device within the LAN Wi will start preamble detection according to a preset cycle and send status data to the data transmission module.

5. A system for realizing indoor fire monitoring and linkage according to claim 4, characterized in that, The step of obtaining the power factor based on the receiver sensitivity includes: Extract the receiver sensitivity and match it with the receiver sensitivity range in the database to obtain the power factor; the database includes the mapping relationship between the receiver sensitivity range and the power factor.

6. A method for realizing indoor fire monitoring and linkage, based on the operation of an indoor fire monitoring and linkage system as described in any one of claims 1-5, characterized in that, include: S1: Environmental information is collected based on detection equipment; the environmental information includes smoke concentration and combustible gas concentration; S2: Control the operating status of the audible and visual alarm based on environmental information; wherein the operating status includes off, first warning signal and / or second warning signal; S3: Mark the detection device whose operating status is the first warning signal and / or the second warning signal as an alarm device; S4: The alarm device generates several wake-up packets and several alarm instruction data packets and sends them to all detection devices in the local area network where the alarm device is located; wherein, the wake-up packet includes the wake-up preamble of the alarm device and the corresponding data packet sequence number, and the alarm instruction data packet includes the alarm instruction and the corresponding data packet sequence number; S5: Based on wake-up packets and alarm command data packets, acquire linked alarm devices located on the same local area network as the alarm device; S6: The alarm linkage device receives the alarm instruction data packet, parses it, and executes the alarm instruction in the alarm instruction data packet.

7. A method for realizing indoor fire monitoring and linkage according to claim 6, characterized in that, The method of acquiring linked alarm devices located on the same local area network as the alarm device based on wake-up packets and alarm command data packets includes: When the wake-up packet period overlaps with the preamble detection period, other detection devices in the same local area network are woken up, calculate the receiving window time for opening the alarm instruction data packet, receive the alarm instruction data packet and parse the alarm instruction, and determine whether the alarm device needs to be linked with other detection devices based on the alarm instruction; if yes, the other detection devices are marked as linked alarm devices; if no, the other detection devices are marked as non-linked alarm devices.

8. A method for realizing indoor fire monitoring and linkage according to claim 7, characterized in that, In the preamble detection, the period of the wake-up packet is greater than the sum of the preamble detection period and the sleep period.

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