CN213657943U - Environment monitoring device - Google Patents
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Abstract
The embodiment of the utility model discloses environment monitoring equipment, wherein, a sensor detection module in the environment monitoring equipment is used for detecting whether a sensor connected with the environment monitoring equipment based on an external interface of the environment monitoring equipment is normal or not when the hardware detection module determines that a hardware module arranged in the environment monitoring equipment is normal; the operating system detection module is used for detecting whether an operating system of the environment monitoring equipment is normal or not when the sensor detection module determines that the sensor connected with the environment monitoring equipment is normal; the application program detection module is used for detecting whether the application program in the environment monitoring equipment is normal or not when the operating system detection module determines that the operating system of the environment monitoring equipment is normal; and the data acquisition module is used for acquiring the environment monitoring data when the application program detection module determines that the application program in the environment monitoring equipment is normal. The technical scheme can effectively ensure the credibility of the environment monitoring data collected by the environment monitoring equipment.
Description
Technical Field
The embodiment of the utility model provides an environment monitoring technology field especially relates to an environment monitoring device.
Background
At present, China establishes an environmental quality monitoring network for water, gas, ecology and the like and a pollution source monitoring network for a heavy pollution source all over the country, lays a data foundation for environmental policy formulation and environmental management of China, and plays an important role.
The environment monitoring and monitoring data is the data basis for the accurate enforcement and scientific management of the environment management department. However, the monitoring and monitoring system based on the internet of things technology has the phenomenon of data falsification during data acquisition, so that the quality of environment monitoring data is questioned. The phenomenon seriously interferes with scientific decision of an environmental management department, destroys the public credibility of an administrative department, and urgently needs to seek a technology for ensuring the credible data acquisition.
SUMMERY OF THE UTILITY MODEL
The utility model provides an environmental monitoring equipment can effectively guarantee the credibility of the environmental monitoring data that environmental monitoring equipment gathered.
In a first aspect, an embodiment of the present invention provides an environment monitoring device, the environment monitoring device includes: the system comprises a hardware detection module, a sensor detection module, an operating system detection module, an application program detection module and a data acquisition module; wherein,
the hardware detection module is used for detecting whether a hardware module built in the environment monitoring equipment is normal or not;
the sensor detection module is used for detecting whether a sensor connected with the environment monitoring equipment based on an external interface of the environment monitoring equipment is normal or not when the hardware detection module determines that a hardware module arranged in the environment monitoring equipment is normal;
the operating system detection module is used for detecting whether an operating system of the environment monitoring equipment is normal or not when the sensor detection module determines that a sensor connected with the environment monitoring equipment is normal;
the application program detection module is used for detecting whether the application program in the environment monitoring equipment is normal or not when the operating system detection module determines that the operating system of the environment monitoring equipment is normal;
the data acquisition module is used for acquiring environment monitoring data when the application program detection module determines that the application program in the environment monitoring equipment is normal.
Further, the hardware detection module comprises a first hardware detection unit and a second hardware detection unit; wherein,
the first hardware detection unit is used for initializing a Central Processing Unit (CPU) and a memory of the environment monitoring equipment based on a first-stage boot code and detecting whether the CPU and the memory are normal or not;
the second hardware detection unit is used for initializing the flash memory module, the display module and the network connection module of the environment monitoring equipment based on a second-stage boot agent and detecting whether the flash memory module, the display module and the network connection module are normal or not.
Further, the sensor detection module comprises a first sensor detection unit and a second sensor detection unit; wherein,
the first sensor detection unit is configured to detect whether a hardware configuration of a sensor connected to the environment monitoring device based on an external interface of the environment monitoring device is normal when the hardware detection module determines that a hardware module built in the environment monitoring device is normal;
the second sensor detection unit is used for detecting whether the configuration parameters of the sensor are normal or not when the first sensor detection unit determines that the hardware configuration of the sensor connected with the environment monitoring equipment is normal.
Further, the application detection module comprises an application running unit and an application parameter verification unit; wherein,
the application program running unit is used for controlling the application program in the environment monitoring equipment to be in a running state when the operating system detection module determines that the operating system of the environment monitoring equipment is normal;
and the application program parameter checking unit is used for checking the parameters of the application program in the running state when the application program in the environment monitoring equipment is controlled to be in the running state.
Further, the method also comprises the following steps: a registration module;
the registration module is used for registering the environment monitoring equipment as a light node in a block chain system through a proxy gateway; wherein the proxy gateway is any full node in the blockchain system.
Further, the registration module comprises a CA certificate acquisition unit, a full node list acquisition unit and a full node public key list acquisition unit; wherein,
the CA certificate acquisition unit is used for acquiring a CA certificate through the proxy gateway;
the full node list acquiring unit is configured to acquire a full node list in the blockchain system through the proxy gateway;
and the all-node public key list acquisition unit is used for acquiring a public key list generated by the public keys of all the nodes in the all-node list through the proxy gateway.
Further, the full node list obtaining unit comprises an identity identification information sending subunit and a full node list receiving subunit; wherein,
the identity identification information sending subunit is configured to send the identity identification information of the environmental monitoring device to the proxy gateway, so that the proxy gateway sends the identity identification information to the block chain system;
a full node list receiving subunit, configured to receive a full node list sent by the proxy gateway; the full node list is the full node list in the blockchain system obtained when the proxy gateway receives a message that the identity identification fed back by the blockchain system passes the verification.
Further, the system also comprises an uplink module;
and the uplink module is used for uplink the environmental monitoring data acquired by the data acquisition module to the block chain system through the proxy gateway.
Further, the uplink module includes a first data processing unit and an uplink unit; wherein,
the first data processing unit is used for packaging the environment monitoring data and hardware parameters, system parameters and application program parameters of the environment monitoring equipment to generate an environment data packet;
the uplink unit is configured to uplink the environmental data packet to the blockchain system through the proxy gateway.
Further, the uplink module further comprises a second data processing unit; wherein,
and the second data processing unit is used for adding a timestamp in the environment data packet and carrying out digital signature on the environment data packet.
The utility model provides an environment monitoring device, environment monitoring device includes: the system comprises a hardware detection module, a sensor detection module, an operating system detection module, an application program detection module and a data acquisition module; the hardware detection module is used for detecting whether a hardware module built in the environment monitoring equipment is normal or not; the sensor detection module is used for detecting whether a sensor connected with the environment monitoring equipment based on an external interface of the environment monitoring equipment is normal or not when the hardware detection module determines that a hardware module arranged in the environment monitoring equipment is normal; the operating system detection module is used for detecting whether an operating system of the environment monitoring equipment is normal or not when the sensor detection module determines that a sensor connected with the environment monitoring equipment is normal; the application program detection module is used for detecting whether the application program in the environment monitoring equipment is normal or not when the operating system detection module determines that the operating system of the environment monitoring equipment is normal; the data acquisition module is used for acquiring environment monitoring data when the application program detection module determines that the application program in the environment monitoring equipment is normal. The embodiment of the utility model provides a technical scheme, through the hardware module to in the environmental monitoring equipment in proper order, sensor, operating system and the application that are connected with the environmental monitoring equipment detect, when hardware module, sensor, operating system and application are all normal, control environmental monitoring equipment gathers environmental monitoring data, can effectively guarantee the credibility of the environmental monitoring data that environmental monitoring equipment gathered, improved the quality of environmental monitoring data.
Drawings
Fig. 1 is a schematic structural diagram of an environment monitoring apparatus according to an embodiment of the present invention;
fig. 2 is a block diagram of an environment monitoring apparatus according to an embodiment of the present invention;
fig. 3 is a structural diagram of a TPM chip according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of the environment monitoring device provided by the embodiment of the present invention at an application layer.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of an environment monitoring device provided by an embodiment of the utility model. As shown in fig. 1, the environment monitoring apparatus includes: the system comprises a hardware detection module 10, a sensor detection module 20, an operating system detection module 30, an application program detection module 40 and a data acquisition module 50; the hardware detection module 10 is configured to detect whether a hardware module built in the environment monitoring device is normal; the sensor detection module 20 is configured to detect whether a sensor connected to the environment monitoring device based on an external interface of the environment monitoring device is normal when the hardware detection module 10 determines that a hardware module built in the environment monitoring device is normal; the operating system detecting module 30 is configured to detect whether an operating system of the environment monitoring device is normal when the sensor detecting module 20 determines that the sensor connected to the environment monitoring device is normal; the application detection module 40 is configured to detect whether an application in the environment monitoring device is normal when the operating system detection module 30 determines that the operating system of the environment monitoring device is normal; the data collection module 50 is configured to collect environmental monitoring data when the application detection module 40 determines that the application in the environmental monitoring device is normal.
The utility model discloses an in the embodiment, after the electricity was gone up to the environmental monitoring equipment, whether the built-in hardware module of hardware detection module 10 detection environmental monitoring equipment in the environmental monitoring equipment was normal. Optionally, the hardware detection module 10 includes a first hardware detection unit and a second hardware detection unit; the first hardware detection unit is used for initializing a Central Processing Unit (CPU) and a memory of the environment monitoring equipment based on a first-stage boot code and detecting whether the CPU and the memory are normal or not; the second hardware detection unit is used for initializing the flash memory module, the display module and the network connection module of the environment monitoring equipment based on a second-stage boot agent and detecting whether the flash memory module, the display module and the network connection module are normal or not. Illustratively, the boot code bootstage1 of the first stage may define entries, set exception vectors, set the speed, clock frequency and terminal control registers of the CPU, initialize the memory controller, copy the programs in the ROM into the RAM, initialize the stack, go to the RAM for execution, and so on. Therefore, the CPU and the memory of the environment monitoring device may be initialized based on the first-stage boot agent, and whether the CPU and the memory are normal or not may be verified, for example, the first-stage boot code bootstage1 is read and executed, when the first-stage boot code bootstage1 is normally executed, it indicates that the CPU and the memory of the environment monitoring device have been initialized, and it is determined that the CPU and the memory are normal. The boot code bootstage2 in the second stage may include functions of calling a series of initialization functions, initializing a Flash module, initializing a system memory allocation function, initializing a system NAND module, initializing a display module, initializing a related network connection module, filling in IP and MAC addresses, and executing command circulation. Therefore, the second hardware detection unit may initialize the memory module, the display module, and the network connection module based on the second stage boot code degree environment monitoring device, and detect whether the flash memory module, the display module, and the network connection module are normal. Illustratively, the boot code bootstage2 in the second stage is read and executed, and when the boot code bootstage2 in the second stage runs normally, it indicates that the flash memory module, the display module, and the network connection module of the environment monitoring device have been initialized, and it is determined that the flash memory module, the display module, and the network connection module are normal.
The embodiment of the utility model provides an in, when environmental monitoring equipment gathered environmental monitoring data, be connected with some sensors through the peripheral hardware interface in the environmental monitoring equipment, like particulate matter sensor, gas sensor or meteorological sensor etc. and when the sensor of being connected with environmental monitoring equipment is unusual, also can influence the validity of environmental monitoring data, consequently, when hardware detection module 10 confirms that the built-in hardware module of environmental monitoring equipment is normal, whether accessible sensor detection module 20 detects the sensor of being connected with environmental monitoring equipment normal. Optionally, the sensor detection module 20 includes a first sensor detection unit and a second sensor detection unit; the first sensor detection unit is configured to detect whether a hardware configuration of a sensor connected to the environment monitoring device based on an external interface of the environment monitoring device is normal when the hardware detection module 10 determines that a hardware module built in the environment monitoring device is normal; the second sensor detection unit is used for detecting whether the configuration parameters of the sensor are normal or not when the first sensor detection unit determines that the hardware configuration of the sensor connected with the environment monitoring equipment is normal. For example, the first sensor detection unit detects a hardware configuration of a sensor connected to the environment monitoring device, and determines whether the hardware configuration of the sensor is normal. When the first sensor detection unit determines that the hardware configuration of the sensor is normal, the second sensor detection unit further detects whether the configuration parameters of the sensor are normal. When the hardware configuration and configuration parameters of the sensor are normal, the operating system detection module 30 in the environment monitoring device is further used for detecting whether the operating system of the environment monitoring device is normal, and when the operating system is abnormal, the accuracy and the validity of the environment monitoring data collected by the environment monitoring device are also greatly influenced.
The embodiment of the utility model provides an in, when the operating system of confirming environment monitoring equipment is normal, whether the application through installation in the application detection module 40 detection environment monitoring equipment is normal. Optionally, the application detection module 40 includes an application running unit and an application parameter verification unit; the application running unit is configured to control an application in the environment monitoring device to be in a running state when the operating system detection module 30 determines that the operating system of the environment monitoring device is normal; and the application program parameter checking unit is used for checking the parameters of the application program in the running state when the application program in the environment monitoring equipment is controlled to be in the running state. Illustratively, when it is determined that the operating system of the environment monitoring device is normal, the application running unit enables the application in the environment monitoring device to be in a running state, and the application parameter verification unit verifies parameters of each application to check whether the parameters of each application are normal. When the application program in the environment monitoring device is determined to be normal, it is indicated that the detection of the hardware module in the environment monitoring device, the sensor, the operating system and the application program connected with the environment monitoring device is completed abnormally, and when the hardware module, the sensor, the operating system and the application program are normal, the data acquisition module 50 acquires environment monitoring data.
The utility model provides an environment monitoring device, environment monitoring device includes: the system comprises a hardware detection module, a sensor detection module, an operating system detection module, an application program detection module and a data acquisition module; the hardware detection module is used for detecting whether a hardware module built in the environment monitoring equipment is normal or not; the sensor detection module is used for detecting whether a sensor connected with the environment monitoring equipment based on an external interface of the environment monitoring equipment is normal or not when the hardware detection module determines that a hardware module arranged in the environment monitoring equipment is normal; the operating system detection module is used for detecting whether an operating system of the environment monitoring equipment is normal or not when the sensor detection module determines that a sensor connected with the environment monitoring equipment is normal; the application program detection module is used for detecting whether the application program in the environment monitoring equipment is normal or not when the operating system detection module determines that the operating system of the environment monitoring equipment is normal; the data acquisition module is used for acquiring environment monitoring data when the application program detection module determines that the application program in the environment monitoring equipment is normal. The embodiment of the utility model provides a technical scheme, through the hardware module to in the environmental monitoring equipment in proper order, sensor, operating system and the application that are connected with the environmental monitoring equipment detect, when hardware module, sensor, operating system and application are all normal, control environmental monitoring equipment gathers environmental monitoring data, can effectively guarantee the credibility of the environmental monitoring data that environmental monitoring equipment gathered, improved the quality of environmental monitoring data.
In some embodiments, the environmental monitoring device further comprises: a registration module; the registration module is used for registering the environment monitoring equipment as a light node in a block chain system through a proxy gateway; wherein the proxy gateway is any full node in the blockchain system. For example, to further ensure the reliability of the environmental monitoring data, the environmental monitoring data may be linked into the blockchain system, but if the environmental monitoring device is linked into the blockchain system, the environmental monitoring device needs to be registered as a light node of the blockchain system. Therefore, the environment monitoring device can be registered as one light node in the blockchain system based on the proxy gateway through the registration module in the environment monitoring device, wherein the proxy gateway is any full node in the blockchain system. Optionally, the registration module includes a CA certificate obtaining unit, a full node list obtaining unit, and a full node public key list obtaining unit; the CA certificate acquisition unit is used for acquiring a CA certificate through the proxy gateway; the full node list acquiring unit is configured to acquire a full node list in the blockchain system through the proxy gateway; and the all-node public key list acquisition unit is used for acquiring a public key list generated by the public keys of all the nodes in the all-node list through the proxy gateway.
Illustratively, the CA certificate acquisition unit sends a CA certificate application request to the proxy gateway, and when the proxy gateway receives the CA certificate application request sent by the environment monitoring device, the CA certificate is acquired from the blockchain system and sent to the environment monitoring device, so that the environment monitoring device successfully applies for the CA certificate from the blockchain system. The all-node list obtaining unit sends the identity identification information of the environment monitoring equipment to the proxy gateway, the proxy gateway sends the identity identification of the environment monitoring equipment to the block chain system, so that the block chain system conducts validity verification on the identity identification information of the environment monitoring equipment, when the verification is passed, the block chain system sends an identity identification verification passing message to the proxy gateway, and when the proxy gateway receives the identity identification verification passing message, the all-node list in the block chain system is obtained, and the all-node list is sent to the environment monitoring equipment. The full node list includes information related to at least one or all of the full nodes in the blockchain system. Optionally, the full node list obtaining unit includes an identity information sending subunit and a full node list receiving subunit; the identity information sending subunit is configured to send the identity information of the environmental monitoring device to the proxy gateway, so that the proxy gateway sends the identity information to the block chain system; a full node list receiving subunit, configured to receive a full node list sent by the proxy gateway; the full node list is the full node list in the blockchain system obtained when the proxy gateway receives a message that the identity identification fed back by the blockchain system passes the verification. After the environment monitoring device acquires the full node list, the full node public key list acquiring unit acquires a public key list generated by public keys of all nodes in the full node list through the proxy gateway. After the operation is completed, the environment monitoring device can also broadcast the public key of the environment monitoring device to the block chain system and send the management data of the environment monitoring device to the block chain system, so that the registration process of the environment monitoring device in the block chain system is completed, and the environment monitoring device is registered as a light node in the block chain system through the proxy gateway.
In some embodiments, the environmental monitoring apparatus further comprises a uplink module; the uplink module is configured to uplink the environmental monitoring data acquired by the data acquisition module 50 to the block chain system through the proxy gateway. For example, the uplink module transmits the environmental monitoring data to the proxy gateway, so that the proxy gateway verifies the credibility of the environmental monitoring data, and when the credibility is verified, the proxy gateway uplinks the environmental monitoring data to the block chain system.
Optionally, the uplink module includes a first data processing unit and an uplink unit; the first data processing unit is used for packaging the environment monitoring data and hardware parameters, system parameters and application program parameters of the environment monitoring equipment to generate an environment data packet; the uplink unit is configured to uplink the environmental data packet to the blockchain system through the proxy gateway. The embodiment of the utility model provides an in, after environmental monitoring equipment registers a light node in the block chain system, environmental monitoring equipment packs the hardware parameter, the system parameter and the application parameter of the environmental monitoring data environmental monitoring equipment who gathers, generates the environmental data package to can be based on the data fingerprint of environmental data package generation can only sign environmental monitoring data (also be environmental data package). The environment monitoring equipment sends the generated environment data packet and the data fingerprint to the proxy gateway, the proxy gateway can verify the credibility of the environment data packet based on the data fingerprint, and the proxy gateway can issue the environment data packet to the block chain system after the credibility is verified.
In some embodiments, the uplink module further comprises a second data processing unit; the second data processing unit is used for adding a timestamp in the environment data packet and performing digital signature on the environment data packet. The advantage of this arrangement is that the authenticity and validity of the environmental monitoring data can be further ensured.
Fig. 2 is a block diagram of an environment monitoring apparatus according to an embodiment of the present invention. As shown in FIG. 2, the environment monitoring device comprises a processor, SDRAM, NANDFLASH, power module, communication module, heartbeat module, ETPM trusted platform module, I2C controller and peripheral interfaces, wherein the hardware detection module 10, the sensor detection module 20, the operating system detection module 30, the application detection module 40 and the data acquisition module 50 in the above embodiments may be embedded in the ETPM trusted platform module in fig. 2. Wherein,
the ETPM trusted Platform module in fig. 2 is implemented by a tpm (trusted Platform module) chip.
Fig. 3 is a structural diagram of a TPM chip according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of the environment monitoring device provided by the embodiment of the present invention at an application layer. The above embodiments can be understood in conjunction with fig. 4.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. An environmental monitoring device, comprising: the system comprises a hardware detection module, a sensor detection module, an operating system detection module, an application program detection module and a data acquisition module; wherein,
the hardware detection module is used for detecting whether a hardware module built in the environment monitoring equipment is normal or not;
the sensor detection module is used for detecting whether a sensor connected with the environment monitoring equipment based on an external interface of the environment monitoring equipment is normal or not when the hardware detection module determines that a hardware module arranged in the environment monitoring equipment is normal;
the operating system detection module is used for detecting whether an operating system of the environment monitoring equipment is normal or not when the sensor detection module determines that a sensor connected with the environment monitoring equipment is normal;
the application program detection module is used for detecting whether the application program in the environment monitoring equipment is normal or not when the operating system detection module determines that the operating system of the environment monitoring equipment is normal;
the data acquisition module is used for acquiring environment monitoring data when the application program detection module determines that the application program in the environment monitoring equipment is normal.
2. The environmental monitoring device of claim 1, wherein the hardware detection module includes a first hardware detection unit and a second hardware detection unit; wherein,
the first hardware detection unit is used for initializing a Central Processing Unit (CPU) and a memory of the environment monitoring equipment based on a first-stage boot code and detecting whether the CPU and the memory are normal or not;
the second hardware detection unit is used for initializing the flash memory module, the display module and the network connection module of the environment monitoring equipment based on a second-stage boot agent and detecting whether the flash memory module, the display module and the network connection module are normal or not.
3. The environmental monitoring device of claim 1, wherein the sensor detection module includes a first sensor detection unit and a second sensor detection unit; wherein,
the first sensor detection unit is configured to detect whether a hardware configuration of a sensor connected to the environment monitoring device based on an external interface of the environment monitoring device is normal when the hardware detection module determines that a hardware module built in the environment monitoring device is normal;
the second sensor detection unit is used for detecting whether the configuration parameters of the sensor are normal or not when the first sensor detection unit determines that the hardware configuration of the sensor connected with the environment monitoring equipment is normal.
4. The environment monitoring device according to claim 1, wherein the application detection module comprises an application running unit and an application parameter verification unit; wherein,
the application program running unit is used for controlling the application program in the environment monitoring equipment to be in a running state when the operating system detection module determines that the operating system of the environment monitoring equipment is normal;
and the application program parameter checking unit is used for checking the parameters of the application program in the running state when the application program in the environment monitoring equipment is controlled to be in the running state.
5. The environmental monitoring device of claim 1, further comprising: a registration module;
the registration module is used for registering the environment monitoring equipment as a light node in a block chain system through a proxy gateway; wherein the proxy gateway is any full node in the blockchain system.
6. The environment monitoring device according to claim 5, wherein the registration module includes a CA certificate acquisition unit, a full node list acquisition unit, and a full node public key list acquisition unit; wherein,
the CA certificate acquisition unit is used for acquiring a CA certificate through the proxy gateway;
the full node list acquiring unit is configured to acquire a full node list in the blockchain system through the proxy gateway;
and the all-node public key list acquisition unit is used for acquiring a public key list generated by the public keys of all the nodes in the all-node list through the proxy gateway.
7. The environmental monitoring device according to claim 6, wherein the full node list obtaining unit includes an identification information sending subunit and a full node list receiving subunit; wherein,
the identity identification information sending subunit is configured to send the identity identification information of the environmental monitoring device to the proxy gateway, so that the proxy gateway sends the identity identification information to the block chain system;
a full node list receiving subunit, configured to receive a full node list sent by the proxy gateway; the full node list is the full node list in the blockchain system obtained when the proxy gateway receives a message that the identity identification fed back by the blockchain system passes the verification.
8. The environmental monitoring apparatus of claim 5, further comprising a uplink module;
and the uplink module is used for uplink the environmental monitoring data acquired by the data acquisition module to the block chain system through the proxy gateway.
9. The environmental monitoring device according to claim 8, wherein the uplink module includes a first data processing unit and an uplink unit; wherein,
the first data processing unit is used for packaging the environment monitoring data and hardware parameters, system parameters and application program parameters of the environment monitoring equipment to generate an environment data packet;
the uplink unit is configured to uplink the environmental data packet to the blockchain system through the proxy gateway.
10. The environmental monitoring device of claim 9, wherein the uplink module further comprises a second data processing unit; wherein,
and the second data processing unit is used for adding a timestamp in the environment data packet and carrying out digital signature on the environment data packet.
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| CN202022838470.9U CN213657943U (en) | 2020-11-30 | 2020-11-30 | Environment monitoring device |
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| CN202022838470.9U CN213657943U (en) | 2020-11-30 | 2020-11-30 | Environment monitoring device |
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