Data transmission method and device based on digital fire-fighting management system

Abstract

The invention provides a data transmission method based on a digital fire-fighting management system. The method comprises the following steps: step 1, network-connected fire-fighting equipment uploads alarm information or state change information to a fire-fighting internet-of-things monitoring center through a network; step 2, matching start characters in the information; 3, judging the length field data of the information; 4, judging a data unit of the information; 5, judging a verification field of the information; step 6, acquiring a check value CRC from the check field; step 7, a check value CRC-CALC from the start character to the data unit is calculated through a cyclic redundancy check formula, if CRC is equal to CRC-CALC, matching is successful, and check is correct; and step 8, the fire-fighting Internet of Things monitoring center receives the alarm information or the state change information uploaded by the network-connected fire-fighting equipment, carries out corresponding processing, sends a confirmation command to the network-connected fire-fighting equipment, and completes data transmission after the network-connected fire-fighting equipment receives the confirmation command.

Description

Technical Field

[0001] This application relates to the technical field of fire management, and particularly to a data transmission method and device based on a digital fire management system. Background Art

[0002] With the development of technology, in recent years, with the wide application of Internet of Things, big data and artificial intelligence technologies. Traditional fire protection mainly focuses on "post-disaster rescue" and emphasizes fire extinguishing capabilities; the management mode is manual inspection and passive response; the monitoring technology uses manual inspection and basic sensors (smoke sensors, temperature sensors), and works with manual records and paper files. The early warning ability is lagging, and the alarm is only given after a fire occurs. Physical devices such as fire trucks, water guns, and fire extinguishers are used for rescue, and walkie-talkies and telephones are used for dispatching. While intelligent digital fire protection uses Internet of Things technology, which can monitor in real time and give early warnings, and the rescue means are intelligent. 5G networks and emergency command platforms are used to achieve multi-terminal linkage. However, existing digital fire management systems usually have problems such as incorrect data parsing, poor fault tolerance, a large amount of network noise data, and data packet splitting when the network condition is unstable. Summary of the Invention

[0003] In view of this, the present invention provides a data transmission method and device based on a digital fire management system to solve the technical problems existing in the prior art, such as incorrect data parsing, poor fault tolerance, a large amount of network noise data, and data packet splitting.

[0004] The present invention provides a data transmission method based on a digital fire management system. The method includes: Step 1, when a fire alarm or a change in the operating state occurs, the network-connected fire equipment uploads alarm information or state change information to the fire IoT monitoring center through the network; Step 2, after the fire IoT monitoring center receives the information, it matches the start symbol in the information; Step 3, if the start symbol is successfully matched, it judges the length field data in the information; Step 4, if the length field data is greater than N1 and less than N2, it judges the data unit of the information, where N1 < N2; Step 5, if the data unit is greater than or equal to N3, it judges the check field of the information; Step 6, if the check field is greater than or equal to N4, it obtains the check value CRC from the check field; Step 7, calculates the check value CRC-CALC from the start symbol to the data unit through the cyclic redundancy check formula. If CRC is equal to CRC-CALC, the match is successful and the check is correct; Step 8, under the condition of correct check, the fire IoT monitoring center receives the alarm information or state change information uploaded by the network-connected fire equipment, performs corresponding processing, sends a confirmation command to the network-connected fire equipment, and after the network-connected fire equipment receives the confirmation command, the data transmission is completed.

[0005] Further, N1 is 2 bytes, N2 is 1000 bytes, and N4 is 2 bytes.

[0006] Further, step 1 further includes: when there is no fire alarm and the operating state remains unchanged, the networked fire-fighting equipment uploads a heartbeat message to the fire-fighting Internet of Things monitoring center via the network.

[0007] Further, step 7 further includes: if the CRC is not equal to CRC-CALC, the verification is incorrect, and the fire-fighting Internet of Things monitoring center discards the information uploaded by the networked fire-fighting equipment.

[0008] Further, step 8 further includes: if the networked fire-fighting equipment does not receive an acknowledgment command within the specified time, a retransmission mechanism is started, and it turns to step 1.

[0009] Further, the method further includes: step 9, the fire-fighting Internet of Things monitoring center sends control command information to the networked fire-fighting equipment to remotely control the fire alarm host to achieve silencing, resetting, starting, stopping, isolating, and releasing operations; step 10, after receiving the control information, the networked fire-fighting equipment matches the start symbol in the information and executes steps 3-7 to verify the received information; step 11, if the verification is correct, the networked equipment executes the control information of the fire-fighting Internet of Things monitoring center and sends an acknowledgment command to the fire-fighting Internet of Things monitoring center. Otherwise, the networked equipment discards the received control information.

[0010] Further, the method further includes: step 12, after receiving the acknowledgment command from the networked equipment, the fire-fighting Internet of Things monitoring center completes the current command issuance; step 13, if the monitoring center does not receive an acknowledgment command within the specified time, a retransmission mechanism is started, and it turns to step 9.

[0011] Further, the communication data packet formats of the alarm information, status change information, and control information include: start symbol, length, address, serial number, command word, data unit, and check field.

[0012] Further, the command word includes a command word value, definition, and direction.

[0013] The present invention also provides a data transmission device based on a digital fire-fighting management system, characterized in that the device includes: networked fire-fighting equipment, including a smoke detector, a hydraulic liquid level detector, a voltage and current detector, a combustible gas detector, and an emergency lighting fixture, for obtaining the pressure of the fire hydrant system, the liquid level of the fire water tank, the voltage, current, residual current, energy consumption, and cable temperature of the electrical fire system, as well as the concentration of combustible gas and harmful gas in the combustible gas system; a fire-fighting Internet of Things monitoring center, connected to the networked fire-fighting equipment, for accessing the fire alarm host protocol, obtaining and monitoring the data uploaded by the networked fire-fighting equipment through fire data transmission technology and fire data analysis technology, performing corresponding processing, and presenting the monitoring results.

[0014] The present invention provides a data transmission method and device based on a digital fire management system, which adopts double data verification technologies of a start symbol and CRC, as well as a timeout retransmission mechanism, and solves the problems that existing digital fire management systems usually have data parsing errors, poor fault tolerance, a large amount of network noise data, and are prone to IP data packet splitting when the network condition is unstable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic flow chart of a data transmission method based on a digital fire management system provided by the present invention; Figure 2 is a schematic flow chart of another data transmission method based on a digital fire management system provided by the present invention; Figure 3 is a schematic flow chart of another data transmission method based on a digital fire management system provided by the present invention; Figure 4 is a schematic diagram of a data transmission device based on a digital fire management system provided by the present invention; Figure 5 is a schematic diagram of an uplink communication technology provided by the present invention; Figure 6 is a schematic diagram of a downlink communication technology provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0017] Embodiment 1: The present invention provides a data transmission method and device based on a digital fire management system, as Figure 1 shown, the method includes the following steps.

[0018] Step 1, when a fire alarm occurs or the operating state changes, the network-connected fire equipment uploads alarm information or state change information to the fire Internet of Things monitoring center through the network; As Figure 4As shown in the figure, intelligent digital fire protection takes "pre-event prevention" as the core, focusing on risk early warning and active prevention and control; the management mode is data-driven, actively monitored, and multi-party coordinated (government, enterprise, public, technology platform); it also includes: fire protection duty, fire protection inspection, fire protection maintenance, and fire protection renovation; including fire protection emergency plans, fire protection emergency drills, fire safety assessments, and fire protection training. Therefore, the data transmission device based on the digital fire protection management system usually includes four parts: network fire protection equipment, fire protection Internet of Things monitoring center, fire protection household registration management module, and fire safety management module. Network-connected fire protection equipment, including smoke detectors, hydraulic liquid level detectors, voltage and current detectors, combustible gas detectors, and emergency lighting fixtures, is used to obtain the pressure of the fire hydrant system, the liquid level of the fire water pool, the voltage, current, residual current, energy consumption, and cable temperature of the electrical fire system, as well as the concentration of combustible gas and harmful gas in the combustible gas system. The fire protection Internet of Things monitoring center is connected to the network-connected fire protection equipment, used to access the fire alarm host protocol, obtain and monitor the data uploaded by the network-connected fire protection equipment through fire protection data transmission technology and fire protection data parsing technology, perform corresponding processing, and display the monitoring results. The fire protection household registration management module is connected to the network-connected fire protection equipment, used to automatically enter the fire protection equipment information according to the information obtained by the network-connected fire protection equipment. After manually entering the unit information, personnel organization structure, building information, key fire protection parts information, fire protection drawing information, and mini fire station information, manage and display all the entered information. Therefore, the fire safety management module is respectively connected to the fire protection household registration management module and the fire protection Internet of Things module, used to manage the information of fire protection duty / inspection / maintenance / renovation personnel, evaluate the fire protection duty personnel according to the off-duty detection, fire alarm rate, and fault handling rate, evaluate the fire protection inspection personnel according to the inspection completion rate and inspection completion quality, evaluate the fire protection maintenance personnel according to the fire protection maintenance completion rate and maintenance completion quality, and evaluate the fire protection renovation personnel according to the off-duty monitoring, fire alarm, and fault handling rate of the fire protection renovation.

[0019] Step 2: After the fire protection Internet of Things monitoring center receives the information, match the start symbol in the information; Step 3: If the start symbol is successfully matched, judge the length field data of the information; Step 4: If the length field data is greater than N1 and less than N2, judge the data unit of the information, where N1 < N2; Step 5: If the data unit is greater than or equal to N bytes, judge the check field of the information; Step 6: If the check field is greater than or equal to 2 bytes, obtain the check value CRC from the check field; Step 7: Calculate the check value CRC-CALC from the start symbol to the data unit through the cyclic redundancy check formula. If CRC is equal to CRC-CALC, the match is successful and the check is correct; Step 8, when the verification is correct, the fire IoT monitoring center receives the alarm information or status change information uploaded by the networked fire equipment, performs corresponding processing, sends a confirmation command to the networked fire equipment, and after the networked fire equipment receives the confirmation command, the data transmission is completed.

[0020] The present invention provides a data transmission method and device based on a digital fire management system, which adopts double data verification technologies of a start symbol and CRC, as well as a timeout retransmission mechanism, and solves the problems that existing digital fire management systems usually have data parsing errors, poor fault tolerance, a large amount of network noise data, and are prone to IP data packet splitting when the network condition is unstable.

[0021] Embodiment 2: The present invention provides a data transmission method and device based on a digital fire management system, as Figure 2 shown, the method includes the following steps.

[0022] Step 1, when a fire alarm occurs or the operating state changes, the networked fire equipment uploads the alarm information or status change information to the fire IoT monitoring center through the network. When there is no fire alarm and the operating state has not changed, the networked fire equipment uploads a heartbeat message to the fire IoT monitoring center through the network; Since intelligent digital fire protection adopts Internet of Things technologies (NB-IoT / LoRa), AI video analysis, infrared thermal imaging and other monitoring technologies. Therefore, it can monitor in real time through networked fire equipment, upload information such as fire alarms and equipment status changes to the monitoring center, so as to achieve the role of early warning.

[0023] Step 2, after the fire IoT monitoring center receives the information, it matches the start symbol in the information; Match the start symbol from the input data, such as "3F 3F". If the input data is less than the pre-set number of bytes, such as 2 bytes, wait for the input data; if the first 2 bytes of the input data do not fully match the start symbol "3F 3F", skip 1 byte of the input data; if the start symbol matches successfully, enter the "length state" and judge the data of the length field of the information.

[0024] Step 3, if the start symbol matches successfully, judge the data of the length field of the information; Illustrate the process of judging the data of the length field of the information: receive 2 bytes of data of the length field. If the input data is less than 2 bytes, wait for the input data; if the input data is greater than or equal to 2 bytes and the length field value is N, if N is greater than 1000 and exceeds the longest designed data packet length, re-enter the "start symbol state", otherwise enter the next state "data part state" and judge the data unit of the information.

[0025] Step 4, if the length field data is greater than N1 and less than N2, then judge the data unit of the information, where N1 < N2; Under normal circumstances, N1 is 2 bytes and N2 is 1000 bytes.

[0026] Step 5, if the data unit is greater than or equal to N3, then judge the check field of the information; According to the data content, the value of N3 can be set. Assume N3 is 10 bytes, receive 10 bytes of data of the data unit. If the input data is less than 10 bytes, wait for the input data; if the input data is greater than or equal to 10 bytes, enter the next state "check state" to judge the check field of the information. When the network is unstable, data packet splitting may occur. However, the technical solution provided by the present invention will wait for all the data to arrive and then assemble them into a complete application data packet, avoiding the problem of data packet splitting.

[0027] Step 6, if the check field is greater than or equal to N4, then obtain the check value CRC from the check field; Normally, N4 is 2 bytes to receive 2 bytes of data of the check field. If the input data is less than 2 bytes, wait for the input data; if the input data is greater than or equal to 2 bytes, obtain the input check value CRC.

[0028] Step 7, calculate the check value CRC-CALC from the start symbol to the data unit through the cyclic redundancy check formula. If CRC is equal to CRC-CALC, the match is successful and the check is correct, then go to Step 8. If CRC is not equal to CRC-CALC, the check is incorrect, and the fire IoT monitoring center discards the information uploaded by the networked fire equipment; Calculate the check value CRC-CALC from the start symbol to the data unit before check through the cyclic redundancy check formula (CRC formula). If CRC is not equal to CRC-CALC, re-enter the "start symbol state". If CRC is equal to CRC-CALC, a complete data packet is successfully matched. Since the cyclic redundancy check formula is a prior art, it will not be elaborated here.

[0029] It can be seen from Steps 3-7 that the technical solution provided by the present invention adopts the technology of finite state machine, and the data reception and parsing steps are clear. Under different conditions, it enters different states, and the data parsing is not easy to make mistakes; this technology can effectively handle the situation of IP data packet splitting in a bad network condition, wait for all the data to arrive and then assemble them into a complete application data packet; this technology can also handle the situation where one IP data packet transmits multiple application data packets, and automatically split one IP data packet into multiple application data packets; this technology has high fault tolerance, and filters out network noise data through start symbol matching, length check, and CRC check, and can quickly recover from the noise data to match the next valid application data packet.

[0030] Step 8. When the verification is correct, the fire IoT monitoring center receives the alarm information or status change information uploaded by the networked fire equipment, performs corresponding processing, sends a confirmation command to the networked fire equipment, and after the networked fire equipment receives the confirmation command, the data transmission is completed.

[0031] The present invention provides a data transmission method and device based on a digital fire management system, which adopts a double data verification technology of a start symbol and CRC, as well as a timeout retransmission mechanism, and solves the problems that existing digital fire management systems usually have data parsing errors, poor fault tolerance, a large amount of network noise data, and are prone to IP data packet splitting when the network condition is unstable.

[0032] Embodiment 3: The present invention provides a data transmission method and device based on a digital fire management system, as Figure 3 shown, the method includes the following steps.

[0033] Step 1. When a fire alarm or a change in the operating state occurs, the networked fire equipment uploads the alarm information or the status change information to the fire IoT monitoring center through the network; As can be seen from the foregoing, the fire household registration management module can manage information such as fire equipment and facilities, unit information, buildings, personnel organizations, key fire prevention areas, fire drawings and documents, and mini fire stations. Some of this information is automatically entered into the system, and some is manually entered by fire staff or managers. The fire IoT monitoring center accesses the protocols of multiple fire alarm hosts, monitors the pressure of the fire hydrant system, the liquid level of the fire pool, etc. through the networked fire equipment, monitors the voltage, current, residual current, energy consumption, cable temperature, etc. of the electrical fire system, monitors the concentration of combustible gas, the concentration of harmful gas, etc. of the combustible gas system, and can display it in the form of a digital cockpit, a digital large screen, etc.

[0034] Step 2. After the fire IoT monitoring center receives the information, it matches the start symbol in the information; Step 3. If the start symbol is successfully matched, the length field data of the information is judged; Step 4. If the length field data is greater than N1 and less than N2, the data unit of the information is judged, where N1 < N2; Step 5. If the data unit is greater than or equal to N bytes, the check field of the information is judged; Step 6. If the check field is greater than or equal to 2 bytes, the check value CRC is obtained from the check field; Step 7. Calculate the check value CRC-CALC from the start symbol to the data unit through the cyclic redundancy check formula. If CRC is equal to CRC-CALC, the match is successful and the verification is correct; Step 8. When the verification is correct, the fire IoT monitoring center receives the alarm information or status change information uploaded by the networked fire equipment, performs corresponding processing, sends a confirmation command to the networked fire equipment. After the networked fire equipment receives the confirmation command, the data transmission is completed. If the networked fire equipment does not receive the confirmation command within the specified time, the retransmission mechanism is started, and it goes back to Step 1.

[0035] The above Steps 1 - 8 are the transmission technologies adopted by the fire network equipment to transmit information such as fire alarms and the operating status of building fire protection facilities, or to transmit heartbeat information to the fire IoT monitoring center, that is, the uplink communication technology. Its communication process is as Figure 5 shown.

[0036] Step 9. The fire IoT monitoring center sends control command information to the networked fire equipment to remotely control the fire alarm host to achieve operations such as silencing, resetting, starting, stopping, isolating, and releasing; After receiving the alarm information or status change information, the fire IoT monitoring center will perform corresponding processing, such as starting the alarm system, stopping the elevator operation, starting the sprinkler device, etc. Therefore, it is necessary to send a control command, that is, control information, to the networked fire equipment to remotely control the fire alarm host to achieve operations such as silencing, resetting, starting, stopping, isolating, and releasing. The communication data packet format of the said information includes: start character, length, address, serial number, command word, data unit, and checksum, as shown in Table 1. The command word includes command word value, definition, and direction, as shown in Table 2.

[0037]

[0038] Table 1 Design of Communication Data Packet Format

[0039] Table 2 Design Table of Command Words Thus, it can be seen that the communication data packet adopts the double data verification technology of start character and CRC to ensure the correctness of data transmission. The communication data packet adopts the command word design method, which can upload data of multiple systems such as the fire alarm system and the fire water system with one set of protocols and has high scalability.

[0040] Step 10. After receiving the control information, the networked fire equipment matches the start character in the information and executes Steps 3 - 7 to verify the received information; Step 11. If the verification is correct, the networked device executes the control information of the fire IoT monitoring center and sends a response command to the fire IoT monitoring center. Otherwise, the networked device discards the received control information.

[0041] Step 12: After the fire IoT monitoring center receives the response command from the networked device, the current command issuance is completed; Step 13: If the fire IoT monitoring center does not receive the response command within the specified time, start the retransmission mechanism and go to Step 9.

[0042] The above Steps 9-13 are the transmission technologies adopted by the fire IoT monitoring center when sending control information to the fire networked devices, that is, the downlink communication technology, which can realize remote control of the fire alarm host such as silencing, resetting, starting, stopping, isolating, and releasing. Its communication process is as Figure 6 shown. Therefore, the technical solution provided by the present invention realizes full-duplex communication. The communication does not require waiting, and the uploading of information and the downloading of control commands can be carried out simultaneously, ensuring the timeliness of data interaction.

[0043] The present invention provides a data transmission method and device based on a digital fire management system, which adopts the double data verification technologies of start symbol and CRC, as well as the timeout retransmission mechanism, and solves the problems that existing digital fire management systems usually have data parsing errors, poor fault tolerance, a large amount of network noise data, and are prone to IP data packet splitting when the network condition is unstable.

[0044] In summary, the embodiments of the present invention provide a data transmission method and device based on a digital fire management system. This technical solution is based on the Internet of Things technology, accurately accesses the protocols of hundreds of fire alarm hosts, and can realize remote control of the fire alarm hosts; based on big data and digital twin technologies, the platform intuitively presents the fire safety situation of the unit in the form of a digital cockpit, a digital large screen, etc. By adopting digital management methods, the fire data of the unit's fire-fighting equipment, personnel, key fire-fighting parts, fire-fighting drawings, mini fire stations, etc. are effectively unified and managed.

[0045] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A data transmission method based on a digital fire management system, characterized in that, The method includes: Step 1, when a fire alarm occurs or the operating state changes, the networked fire protection equipment uploads alarm information or state change information to the fire protection Internet of Things monitoring center through the network; Step 2, after the fire protection Internet of Things monitoring center receives the information, it matches the start symbol in the information; Step 3, if the start symbol is successfully matched, the length field data in the information is judged; Step 4, if the number of bytes of the length field data is greater than N1 and less than N2, the data unit of the information is judged, where N1 < N2; Step 5, if the number of bytes of the data unit is greater than or equal to N3, the check field of the information is judged; Step 6, if the number of bytes of the check field is greater than or equal to N4, the check value CRC is obtained from the check field; Step 7, calculate the check value CRC-CALC from the start symbol to the data unit through the cyclic redundancy check formula. If CRC is equal to CRC-CALC, the match is successful and the check is correct; Step 8, in the case of correct check, the fire protection Internet of Things monitoring center receives the alarm information or state change information uploaded by the networked fire protection equipment, and performs corresponding processing, sends an acknowledgment command to the networked fire protection equipment. After the networked fire protection equipment receives the acknowledgment command, the data transmission is completed.

2. The data transmission method based on a digital fire management system according to claim 1, characterized in that, N1 is 2 bytes, N2 is 1000 bytes, and N4 is 2 bytes.

3. A data transmission method based on a digital fire management system according to claim 1, characterized in that, Step 1 further includes: when there is no fire alarm and the operating state has not changed, the networked fire protection equipment uploads a heartbeat message to the fire protection Internet of Things monitoring center through the network.

4. A data transmission method based on a digital fire management system according to claim 1, characterized in that, Step 7 further includes: if CRC is not equal to CRC-CALC, the check is incorrect, and the fire protection Internet of Things monitoring center discards the information uploaded by the networked fire protection equipment.

5. A data transmission method based on a digital fire management system according to claim 1 or 3, characterized in that, Step 8 further includes: if the networked fire protection equipment does not receive the acknowledgment command within the specified time, a retransmission mechanism is started, and it goes back to Step 1.

6. A data transmission method based on a digital fire management system according to claim 1, characterized in that, The method further includes: Step 9, the fire protection Internet of Things monitoring center sends control information to the networked fire protection equipment to remotely control the fire alarm host to implement operations such as silencing, resetting, starting, stopping, isolating, and releasing; Step 10, after the networked fire protection equipment receives the control information, it matches the start symbol in the information and executes Steps 3-7 to check the received information; Step 11, if the check is correct, the networked device executes the control information of the fire protection Internet of Things monitoring center and sends an acknowledgment command to the fire protection Internet of Things monitoring center. Otherwise, the networked device discards the received control information.

7. A data transmission method based on a digital fire management system according to claim 5, characterized in that The method further includes: Step 12, after the fire protection Internet of Things monitoring center receives the acknowledgment command from the networked device, this command issuance is completed; Step 13, if the monitoring center does not receive the acknowledgment command within the specified time, a retransmission mechanism is started, and it goes back to Step 9.

8. A data transmission method based on a digital fire management system according to claim 1 or 6, characterized in that, The communication data packet formats of the alarm information, state change information, and control information include: start symbol, length, address, sequence number, command word, data unit, and check field.

9. A data transmission method based on a digital fire management system according to claim 7, characterized in that, The command word includes a command word value, definition, and direction.

10. An apparatus for implementing the data transmission method based on the digital fire management system according to claims 1-9, characterized in that, The device includes: Network-connected fire-fighting equipment, including smoke detectors, hydraulic liquid level detectors, voltage and current detectors, combustible gas detectors and emergency lighting fixtures, is used to obtain the pressure of the fire hydrant system, the pool liquid level of fire-fighting water, the voltage, current, residual current, energy consumption, and cable temperature of the electrical fire system, as well as the combustible gas concentration and harmful gas concentration of the combustible gas system; The fire-fighting Internet of Things monitoring center, connected to the network-connected fire-fighting equipment, is used to access the fire alarm host protocol, obtain and monitor the data uploaded by the network-connected fire-fighting equipment through fire-fighting data transmission technology and fire-fighting data parsing technology, perform corresponding processing, and display the monitoring results.

Images