Gas detection system based on Bluetooth MESH data security transmission

Abstract

The utility model provides a gas detection system based on Bluetooth MESH data security transmission, which is used for solving the technical problems that the data of the existing gas detection system is easy to leak and certain data security risk exists. The device comprises a concentrator and a detector, encryption chips are arranged in the concentrator and the detector, and the encryption chips are used for encrypting gas detection data; the concentrators and the detectors in the local areas are connected through Bluetooth MESH, the detectors are connected through Bluetooth MESH, and the concentrators in the local areas are in wireless connection; the concentrator is in wireless connection with the cloud platform, and the cloud platform is connected with the mobile terminal. According to the utility model, information interaction in a local area network can be realized, information transmission between multiple local area networks and between local area networks and wide area networks can be realized, transmission data encryption can be realized, and the security of transmission information is ensured; the user layout is convenient; the device is wide in application scene and supports detection environments of almost any kind of gas.

Description

Technical Field

[0001] The utility model relates to the technical field of gas detection, in particular to a gas detection system based on secure Bluetooth MESH data transmission. Background Art

[0002] In industries such as petroleum, chemical, and coal, as well as in residential buildings, combustible gas pipelines can be seen everywhere, posing great potential safety hazards. Once combustible gas leaks, it will cause fire and explosion accidents, resulting in huge losses to people's lives and property. To ensure people's lives and property safety and eliminate the safety hazards of combustible gas, a hazardous gas alarm is used for real-time monitoring. Once combustible gas is detected, an alarm is immediately triggered. However, currently, most hazardous gas alarms are connected by wired means. Due to the complex environment of residential buildings and the large area and complex terrain of many chemical plants, wiring is difficult and costly.

[0003] With the development of electronic technology, wireless transmission has gradually become the mainstream. The emergence of local area networks (LANs) and wide area networks (WANs) has provided us with more options. Wireless communication technology is not restricted by geography or space, has good scalability, is easy to deploy, is convenient to use, and has a low cost, making it increasingly valued and widely applied in various fields.

[0004] Bluetooth mesh has both Bluetooth search function and mesh networking function, and can be extended into a LAN with a star topology structure, enabling communication within the LAN and group-to-group communication between LANs. It has the characteristics of low power consumption, wide coverage, ultra-low cost, and large network capacity. It can form a security defense line within the area, eliminating the cost problems and wiring difficulties brought by wired connections. Information interaction between regions can be used to know the situation of the leakage area through another safe area, increasing the scope of linkage monitoring and improving the safety of personnel supervision.

[0005] Although Bluetooth mesh networking can ensure information intercommunication within the area through networking and information dissemination between groups, after all, the LAN is within a certain range. Therefore, it can be connected to the network through a Cat1 module to extend the monitoring range from the LAN to the entire WAN. The Cat1 module can upload alarm information to the gateway, and the gateway can promptly inform the manager through mobile phone text messages and information push.

[0006] During the above information transmission process, information leakage is extremely likely to occur. Therefore, it is extremely important to encrypt the transmitted information. By using an encryption chip to encrypt the information before transmission, the security of the information is ensured, and the possibility of information leakage is eliminated. However, in the prior art, the encryption chip and Bluetooth mesh networking have not been combined and applied in gas detection.

[0007] The utility model patent with the application number 201922416476.4 discloses a gas monitor based on Bluetooth Mesh, which includes a current detection circuit and a Bluetooth MESH controller. When the Bluetooth MESH controller is in a low-voltage state, the Bluetooth MESH controller outputs a low level, and the low level is used to trigger the charging circuit to charge the battery. The above Bluetooth Mesh node is wireless and low-power. When the device's wireless communication is normal, the power consumption is low, which can extend the power supply time of the battery to the device. A charging circuit is provided inside it, which can effectively solve the problem in the prior art that the use cost is high due to the need to replace the battery after its power is exhausted. However, the above patent cannot encrypt the transmitted information, mainly transmits in plain text, and the data is easy to leak, there is a certain data security risk. Utility Model Content

[0008] Aiming at the technical problem that the data of the existing gas detection system is easy to leak and there is a certain data security risk, the utility model proposes a gas detection system based on secure Bluetooth MESH data transmission, which has a CAT1 communication mechanism inside. It can not only realize information interaction within a local area network, but also realize information transfer between multiple local area networks and between a local area network and a wide area network, and can realize the encryption of transmitted data. The encrypted information is uploaded to the cloud platform. It can not only notify on-site personnel through on-site sound and light alarms, but also notify managers in a timely manner through the cloud platform by means of phone calls, text messages, information push, etc., and make timely and effective handling to eliminate or reduce the losses caused by the incident.

[0009] To achieve the above purpose, the technical solution of the utility model is realized as follows: A gas detection system based on secure Bluetooth MESH data transmission includes a concentrator and detectors. Encryption chips are provided in both the concentrator and the detectors, and the encryption chips encrypt the data of gas detection. The concentrator and detectors in the local area are connected by Bluetooth MESH, and the concentrators between local areas are wirelessly connected; the concentrator is wirelessly connected to the cloud platform, and the cloud platform is connected to the mobile terminal.

[0010] Preferably, the concentrator is connected to the cloud platform through 4G communication.

[0011] Preferably, the concentrator includes a first gas sensor, a 4G communication module, a first Bluetooth MESH communication module, a first encryption chip, and a first MCU control chip. The first gas sensor, the 4G communication module, the first Bluetooth MESH communication module, and the first encryption chip are all connected to the first MCU control chip. The 4G communication module is connected to the cloud platform, the first Bluetooth MESH communication module is connected to the detectors, and data transmission between concentrators is carried out through the first Bluetooth MESH communication module.

[0012] Preferably, the detector includes a second gas sensor, a second Bluetooth MESH communication module, a second encryption chip, and a second MCU control chip. The second gas sensor, the second Bluetooth MESH communication module, and the second encryption chip are all connected to the second MCU control chip; the second Bluetooth MESH communication module is matched with the first Bluetooth MESH communication module.

[0013] Preferably, the detectors are connected through the mesh networking function of the second Bluetooth MESH communication module, and the second Bluetooth MESH communication module and the first Bluetooth MESH communication module are connected through the mesh networking function; the concentrators are connected through the Bluetooth search function of the first Bluetooth MESH communication module.

[0014] Preferably, the 4G communication module is a CAT1 communication module, and the CAT1 communication module uses an EC800E wireless module.

[0015] Preferably, the first encryption chip is connected to the first MCU control chip through the I2C protocol, and the second encryption chip is connected to the second encryption chip through the I2C protocol.

[0016] Preferably, both the first Bluetooth mesh communication module and the second Bluetooth MESH communication module use an HJ-810FEM-PA chip, and the HJ-810FEM-PA chip supports BLE Mesh, supports the BLE GATT slave, and supports the BLE host function.

[0017] Preferably, the first Bluetooth mesh communication module is driven through the UART pin of the first MCU control chip, and the second Bluetooth MESH communication module is driven through the UART pin of the second MCU control chip.

[0018] Preferably, the first MCU control chip and the second MCU control chip are HC32L170 series processors, and the HC32L170 series processors use an ARM Cortex-A0 core; the first encryption chip and the second encryption chip use a CIU98-D security chip, and the CIU98-D security chip uses a 32-bit ARM SC000 security processor core.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] 1. The present utility model uses an encryption chip to encrypt and transmit information, ensuring the security of the transmitted information;

[0021] 2. The present utility model is a wireless device, which is convenient for users to layout;

[0022] 3. The utility model realizes the networking mode of local area network + public network, and combines group-internal alarm, inter-group linkage alarm and public network alarm, so as to lengthen the protection line and greatly increase the protection range.

[0023] 4. The utility model has a wide range of applicable scenarios and supports almost any kind of gas detection environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 It is a schematic structural diagram of the present utility model.

[0026] Figure 2 It is a specific structural diagram of the communication of the present utility model.

[0027] Figure 3 It is a principle block diagram of the detector of the present utility model.

[0028] Figure 4 It is a principle block diagram of the concentrator of the present utility model.

[0029] Figure 5 It is a functional implementation flowchart of the present utility model.

[0030] In the figure, 1 is the concentrator, 2 is the detector, and 3 is the cloud platform. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0032] Such as Figure 1As shown in the figure, a gas detection system based on Bluetooth MESH data secure transmission provided by the present utility model uses Bluetooth MESH networking to achieve communication between the concentrator 1 and the detector 2 within a region, and uses the scanning mode to achieve information interconnection between regions. Each concentrator 1 and detector 2 send alarm information to surrounding devices, and when receiving the alarm information, they will transmit the alarm information and no longer receive the same alarm information. The concentrator 1 realizes communication with the cloud platform 3 through the CAT1 communication module of the 4G communication module. The cloud platform 3 is connected to the mobile terminal. The cloud platform 3 performs APP push, SMS, etc. to the mobile terminal through wireless communication to realize the transmission of alarm information. The detector 2 is wirelessly connected to the detector 2 and between the detector 2 and the concentrator 1. The specific topology diagram is as Figure 1 and Figure 2 shown.

[0033] As Figure 4 shown, the concentrator 1 includes a first gas sensor, a 4G communication module, a first Bluetooth MESH communication module, a first encryption chip, and a first MCU control chip. The first gas sensor, the 4G communication module, the first Bluetooth MESH communication module, and the first encryption chip are all connected to the first MCU control chip. The first gas sensor is used to collect the gas concentration at the location where the concentrator 1 is located. The 4G communication module can be connected to the cloud platform 3, and the 4G communication module realizes the wireless connection between the concentrator 1 and the cloud platform 3. The 4G communication module is a CAT1 communication module, and wireless communication is realized through the CAT1 communication mechanism. The CAT1 communication module communicates through a phone card. The MCU control chip is connected to the first encryption chip, and the encryption chip realizes the encryption of all data to be transmitted. The concentrators 1 in different local area networks are connected through the Bluetooth function of the first Bluetooth MESH communication module.

[0034] As Figure 3As shown in the figure, the detector 2 is composed of a second gas sensor, a second Bluetooth MESH communication module, a second encryption chip, and a second MCU control chip. The second gas sensor, the second Bluetooth MESH communication module, and the second encryption chip are all connected to the second MCU control chip, and the second Bluetooth MESH communication module is matched with the first Bluetooth MESH communication module. The second gas sensor is used to detect the gas concentration at the location where the detector 2 is located. The second MCU control chip transmits the data obtained by the second gas sensor to the second encryption chip through the I2C protocol. The second encryption chip encrypts the data and then transmits it back to the second MCU control chip. The second MCU control chip transmits the data transmitted back by the second encryption chip to the surrounding detectors 2 or concentrators 1 through the mesh networking function of the second Bluetooth MESH communication module. Local area a and local area b are exactly the same, except for the frequency. Local area a and local area b can only transmit data through the Bluetooth function of the concentrator 1, and this local area is extensible and can have n local areas, namely local area a, local area b, …, and local area n. Data is transmitted between two local areas through the Bluetooth function.

[0035] As Figure 1 shown in the figure, the utility model is divided into in-area communication, area-to-area communication, and area-to-cloud platform communication. As Figure 1 in local area A, the in-area communication includes the concentrator 1 and multiple detectors 2, which form a local area network by using the Bluetooth mesh communication module for networking. After an event is triggered, the detector 2 reports the encrypted event information to the concentrator 1 through the mesh networking. Additionally, when the detector 2 or the concentrator 1 receives the encrypted information transmitted by the Bluetooth mesh, it will transmit the received encrypted information to the encryption chip through the I2C protocol. The encryption chip decrypts the encrypted data and then transmits it back to the MCU control chip. The MCU control chip extracts the valid event information and makes corresponding responses.

[0036] For communication between local area A and local area B, the Bluetooth transmission function of the Bluetooth MESH communication module of the concentrator 1 is used. Local area A and local area B are paired through the Bluetooth search function of the concentrator 1. When a trigger event is detected by the concentrator 1 or multiple detectors 2 within local area A, that is, when the MCU control chip detects that the gas factor in the current environment exceeds the normal range through the gas sensor and triggers an event, the trigger event will be encrypted and reported to the concentrator 1, and then the concentrator 1 will transmit the trigger event to local area B, and so on. The protection line can be extended through the communication between local area networks, and multiple local area networks can be added.

[0037] The communication between the area and the cloud platform 3 uses the cat1 function of the 4G communication module of the concentrator 1. The CAT1 communication module uses the EC800E wireless module. Its goal is to provide a powerful star base station for many wireless nodes within a wide area. The CAT1 communication module has stable performance, can transmit a large amount of data, and supports full-network communication. It is widely used in fields such as the automation field and intelligent metering. In this system, the CAT1 communication module reports the encrypted event information to the cloud platform 3, and the cloud platform 3 sends the event information to the recipient via text message or phone call for a quick and timely response. The data transmitted must be encrypted, and the MCU control chip will decrypt it after receiving the data. The decrypted data is the real valid data.

[0038] The Bluetooth mesh communication module of the concentrator 1 uses the HJ-810FEM-PA (mesh + BLE coexistence version) chip, which supports BLEMesh, supports the BLE GATT slave function, and supports the BLE host function. That is, the Bluetooth mesh communication module supports both the mesh networking function and the Bluetooth search function, and they coexist with each other. It can perform mesh networking and Bluetooth pairing, and the maximum supported distance is 100 meters. The Bluetooth mesh communication module can be driven through the UART pin of the MCU control chip. Bluetooth Mesh networking is a wireless network structure designed based on the Bluetooth Low Energy (BLE) technology. It allows multiple Bluetooth devices to form a multi-to-multi connection and communication, thus creating a self-organizing network that can be extended to a large area and accommodate thousands of nodes. In a Bluetooth Mesh network, each device can act as a sender, receiver, or even a relay node for message propagation in the network. In this way, even if there is no direct radio communication link between two devices, the message can be relayed through other devices in the network to ensure the reliable propagation of information throughout the network. Bluetooth pairing is to search for and connect to Bluetooth.

[0039] The MCU control chip selects the Huada HC32L170 series processor, which is a high-performance, ultra-efficient, and low-cost processor sub-series. It uses the advanced ARM Cortex-A0 core and has an operating speed of 48MHz.

[0040] The encryption chip uses the Huada CIU98-D security chip. This security chip has rich encryption algorithms, supports multiple security protection mechanisms, uses a 32-bit ARM SC000 security processor core, supports data operations such as symmetric encryption and decryption, MAC operation, asymmetric encryption and decryption, and HASH calculation, and has a minimum power consumption of less than 1uA (microampere), with low power consumption.

[0041] The specific communication logic of the system of the present utility model is mainly divided into mesh networking communication, Bluetooth communication, and CAT1 communication. The specific implementation logic is as follows: Bluetooth mesh networking communication is carried out through the Bluetooth MESH communication module within the local area network, and multiple local area networks communicate with each other through the Bluetooth search function; the local area network and the wide area network are uploaded to the cloud platform 3 through the CAT1 communication module.

[0042] The flow chart of the entire function implementation of the present utility model is as Figure 5 shown. The detector 2 and the concentrator 1 are registered on the platform. The Bluetooth MESH communication module groups Bluetooth meshes through different frequencies, and networking is not possible between different frequencies. When an event is triggered, that is, when the gas concentration detected by the gas sensor exceeds the set threshold, the detector 2 within the local area a reports the encrypted data to the concentrator 1 (with Bluetooth mesh + Bluetooth function) through Bluetooth mesh networking. The concentrator 1 transfers the encrypted data of the local area a to the local area b through the Bluetooth search function of the first Bluetooth MESH communication module. The encryption chip encrypts the data and uploads it to the cloud platform 3 through the CAT1 communication module. When the cloud platform 3 receives the event notification, the cloud platform 3 decrypts the encrypted data through the encryption and decryption algorithm, and the cloud platform 3 sends the triggered event to the user and the administrator by sending phone text messages and information push.

[0043] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A gas detection system based on secure Bluetooth MESH data transmission, comprising a concentrator (1) and a detector (2), characterized in that, Both the concentrator (1) and the detector (2) are equipped with encryption chips, which encrypt the gas detection data. The concentrator (1) and the detector (2) in the local area are connected via Bluetooth MESH, and the concentrators (1) between different local areas are wirelessly connected. The concentrator (1) is wirelessly connected to the cloud platform (3), and the cloud platform (3) is connected to the mobile terminal.

2. The gas detection system based on Bluetooth MESH data secure transmission according to claim 1, wherein The concentrator (1) is connected to the cloud platform (3) via 4G communication.

3. The gas detection system for secure Bluetooth MESH data transmission according to claim 1 or 2, characterized in that, The concentrator (1) includes a first gas sensor, a 4G communication module, a first Bluetooth MESH communication module, a first encryption chip, and a first MCU control chip. The first gas sensor, the 4G communication module, the first Bluetooth MESH communication module, and the first encryption chip are all connected to the first MCU control chip. The 4G communication module is connected to the cloud platform (3), and the first Bluetooth MESH communication module is connected to the detector (2). Data transmission between concentrators (1) is carried out through the first Bluetooth MESH communication module.

4. The gas detection system for secure Bluetooth MESH data transmission according to claim 3, wherein, The detector (2) includes a second gas sensor, a second Bluetooth MESH communication module, a second encryption chip, and a second MCU control chip. The second gas sensor, the second Bluetooth MESH communication module, and the second encryption chip are all connected to the second MCU control chip. The second Bluetooth MESH communication module is matched with the first Bluetooth MESH communication module.

5. The gas detection system based on Bluetooth MESH data secure transmission according to claim 4, wherein, Two detectors (2) are connected through the mesh networking function of the second Bluetooth MESH communication module, and the second Bluetooth MESH communication module and the first Bluetooth MESH communication module are connected through the mesh networking function. The concentrators (1) are connected through the Bluetooth search function of the first Bluetooth MESH communication module.

6. The gas detection system for secure Bluetooth MESH data transmission according to claim 4, characterized in that, The 4G communication module is a CAT1 communication module, and the CAT1 communication module uses the EC800E wireless module.

7. The gas detection system based on Bluetooth MESH data secure transmission according to any one of claims 4-6, characterized in that, The first encryption chip is connected to the first MCU control chip via the I2C protocol, and the second encryption chip is connected to the second encryption chip via the I2C protocol.

8. The gas detection system based on Bluetooth MESH data secure transmission according to claim 7, wherein, Both the first Bluetooth mesh communication module and the second Bluetooth MESH communication module use the HJ-810FEM-PA chip, which supports BLE Mesh, supports the BLE GATT slave, and supports the BLE host function.

9. The gas detection system for secure Bluetooth MESH data transmission according to claim 8, wherein, The first Bluetooth mesh communication module is driven through the UART pin of the first MCU control chip, and the second Bluetooth MESH communication module is driven through the UART pin of the second MCU control chip.

10. The gas detection system based on Bluetooth MESH data secure transmission according to claim 8 or 9, characterized in that, The first MCU control chip and the second MCU control chip are HC32L170 series processors, and the HC32L170 series processors use the ARM Cortex-A0 kernel. The first encryption chip and the second encryption chip use the CIU98-D security chip, and the CIU98-D security chip uses a 32-bit ARM SC000 security processor kernel.

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