CN213120889U - Nitrogen-filled explosive sealing box internal environment monitoring device - Google Patents
Nitrogen-filled explosive sealing box internal environment monitoring device Download PDFInfo
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- CN213120889U CN213120889U CN202021331756.1U CN202021331756U CN213120889U CN 213120889 U CN213120889 U CN 213120889U CN 202021331756 U CN202021331756 U CN 202021331756U CN 213120889 U CN213120889 U CN 213120889U
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 239000002360 explosive Substances 0.000 title claims abstract description 34
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 25
- 238000012806 monitoring device Methods 0.000 title claims abstract description 11
- 238000007789 sealing Methods 0.000 title description 7
- 230000006854 communication Effects 0.000 claims abstract description 62
- 238000004891 communication Methods 0.000 claims abstract description 61
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000001301 oxygen Substances 0.000 claims abstract description 29
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 29
- 230000001133 acceleration Effects 0.000 claims abstract description 28
- 238000012544 monitoring process Methods 0.000 claims abstract description 14
- 230000002093 peripheral effect Effects 0.000 claims abstract description 3
- 239000007789 gas Substances 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 230000004069 differentiation Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 5
- 230000002269 spontaneous effect Effects 0.000 abstract description 5
- 229910001873 dinitrogen Inorganic materials 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000003321 amplification Effects 0.000 description 10
- 238000003199 nucleic acid amplification method Methods 0.000 description 10
- 238000005259 measurement Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 238000004880 explosion Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011022 operating instruction Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Abstract
The utility model discloses a fill nitrogen explosive seal box internal environment monitoring device for environmental parameter when monitoring explosive and storing and transporting, and give operating personnel with information through wireless and wired mode feedback, the device adopts the GD32F407 chip to be the master control unit, and peripheral distribution temperature collection module, oxygen concentration collection module, internal pressure collection module, vibration acceleration collection module, CAN wired communication module and WIAPA wireless communication module. During transportation, the wired communication module is mainly used for communicating with the vehicle-mounted console, and during storage, the wireless communication module is mainly used for communicating with the wireless gateway and the computer. The device provided by the utility model can effectively reduce because factors such as vehicle-mounted vibration, high temperature, nitrogen gas leak bring explosive spontaneous combustion hidden danger.
Description
One, the technical field
The utility model belongs to industrial automation monitoring instrument field, especially a fill interior environment monitoring device of nitrogen explosive seal box.
Second, background Art
The temperature reaches the ignition point, the oxygen concentration is too high, the vibration is too violent, three main factors of spontaneous combustion and explosion of explosives are generated, the storage management of the explosives at present mostly belongs to artificial management, and negligence can be caused when the external environment changes. Once explosion or spontaneous combustion of explosives occurs, significant economic loss and casualties are brought about. Generally, explosives with higher value need to establish a special warehouse which meets the standard and is equipped with protection facilities for temperature regulation, fire prevention, explosion prevention and the like. However, most of the existing special warehouses adopt a fixed-point detection instrument, and the method has the defects that once the detection instrument is completely assembled, the change and replacement are complicated, the storage place of explosives is fixed, the large-area coverage cost of the detection instrument is high, warehouse resources are wasted, and nitrogen leakage in a sealing box of a detection device is difficult to detect. Meanwhile, even if the protection facility has an early warning function, explosives which are possibly exploded or spontaneously combusted are difficult to be checked in a targeted mode, so that time is consumed, and reaction is delayed.
In addition, in the transportation process of the nitrogen-filled explosive sealed box, the possibility of danger is higher due to possible bumping and vibration and uncertainty of the external high-temperature environment, and if a driver cannot be informed in time when an explosion happens, immeasurable loss can be brought.
Third, the contents of the utility model
The utility model provides a fill nitrogen explosive seal box internal environment monitoring devices can effectively reduce because factors such as on-vehicle vibration, high temperature, nitrogen gas leak bring explosive spontaneous combustion hidden danger.
One embodiment of the invention provides a device for monitoring the environment in a nitrogen-filled explosive sealed box, which comprises a GD32F407 main control unit;
the GD32F407 main control unit is connected with the WIAPA wireless communication module, and communication is implemented between the two through an SCIA serial port; the WIAPA wireless communication module is in wireless communication with an external wireless gateway and a computer, and receives and transmits information such as the running state of a device, the self-checking state of the device, the parameters of the device, the data of each sensor of the device, the operation instructions of the computer and the like;
the GD32F407 main control unit is connected with a CAN wired communication module, communication is implemented between the GD32F407 main control unit and the CAN wired communication module through a CANA port, wired communication is implemented between the CAN wired communication module and an external vehicle-mounted control console, and information such as the running state of a transceiver, the self-checking state of the device, the parameters of the device, the data of each sensor of the device, the operating instructions of the vehicle-mounted control console and the like is received and transmitted;
the GD32F407 main control unit is connected with the RTC clock module, and IIC is adopted for communication between the GD32F407 main control unit and the RTC clock module;
the GD32F407 main control unit is connected with the oxygen concentration acquisition module, IIC is adopted for communication between the GD32F407 main control unit and the oxygen concentration acquisition module, the oxygen concentration in the device is acquired at regular time according to a set period, and an alarm signal is sent out in a wireless or wired mode when the oxygen concentration exceeds a threshold value.
Preferably, the GD32F407 main control unit is connected with the acceleration acquisition module, an SPI (serial peripheral interface) port is adopted between the acceleration acquisition module and the acceleration acquisition module to implement communication, the acceleration acquisition module acquires the three-axis vibration acceleration during transportation of the device, and an alarm signal is sent out in a wired mode when the acceleration acquisition module exceeds a threshold value.
Preferably, the GD32F407 main control unit is connected to the internal pressure acquisition module, and is configured to perform analog-to-digital conversion on the obtained device internal pressure analog signal; and according to a set period, acquiring the internal gas pressure of the device at regular time, and sending an alarm signal in a wireless or wired mode when the internal gas pressure exceeds a threshold value.
Preferably, the GD32F407 main control unit is connected to the temperature acquisition module, and performs analog-to-digital conversion on the obtained device internal temperature analog signal. The internal pressure acquisition module is used for acquiring the internal gas pressure of the device regularly according to a set period, and if the internal gas pressure exceeds a threshold value, an alarm signal is sent out in a wireless or wired mode.
Preferably, the GD32F407 main control unit is connected to a FLASH module, and the FLASH module is mainly used for storing configuration parameters, temperature data, internal pressure data, and oxygen concentration data.
Preferably, the GD32F407 main control unit is connected with a TF card module, and the TF card module is mainly used for storing acceleration vibration data.
Preferably, the system comprises a power supply module, and the power supply module supplies power to the rest modules: WIAPA wireless communication module's supply voltage is 3.3V, the wired communication module's of CAN supply voltage is 3.3V, RTC clock module's supply voltage is 3.0V, oxygen concentration acquisition module's supply voltage is 3.3V, acceleration acquisition module's supply voltage is 3.3V, internal pressure acquisition module's supply voltage is 9V, temperature acquisition module's supply voltage is 3.3V, TF card module supply voltage for 2.5V, FLASH module's supply voltage is 3.3V.
Preferably, to prevent the input of external dangerous energy, the CAN communication interface isolates the communication circuit from internal signals by using a TLP281_4 optical coupling isolation unit.
Preferably, during storage, multiple devices simultaneously start wireless communication, upload data to the same wireless gateway, and perform differentiation by wireless node ID.
Preferably, during transportation, a plurality of devices are simultaneously connected to the vehicle-mounted console, and are distinguished by the ID number of the CAN.
The utility model provides a fill interior environment monitoring device of nitrogen explosive seal box has following profitable technological effect: the monitoring device can monitor parameters such as temperature, gas pressure, vibration and oxygen concentration in the explosive sealed box under the conditions of storage and transportation, and effectively reduce the spontaneous combustion hidden danger of the explosive caused by vehicle-mounted vibration, high temperature, nitrogen leakage and other factors.
Drawings
Fig. 1 is a schematic diagram of a circuit connection block diagram of the device for monitoring the environment in the nitrogen-filled explosive sealing box of the present invention.
Fig. 2 is a layout diagram of the environmental monitoring device inside the nitrogen-filled explosive sealing box of the utility model during warehouse storage and transportation.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
In the present application, the term "plurality" means two or more unless expressly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Referring to fig. 1, the apparatus for monitoring the environment inside a nitrogen-filled explosive sealed box includes: the device comprises a GD32F407 main control unit, a WIAPA wireless communication module, a CAN wired communication module, an RTC clock module, an oxygen concentration acquisition module, an acceleration acquisition module, an internal pressure acquisition module, a temperature acquisition module, a FLASH module, a TF card module and a power supply module. The master control unit and the WIAPA wireless communication module adopt an SCIA serial port to implement communication. And the main control unit and the CAN wired communication module adopt a CANA interface to implement communication. And the main control unit and the RTC clock module adopt IIC to implement communication. IIC is adopted between the main control unit and the oxygen concentration acquisition module to implement communication. The main control unit and the acceleration acquisition module are communicated by an SPI port. The main control unit is connected with the internal pressure acquisition module and obtains a sensor value by adopting internal analog-to-digital conversion. The main control unit is connected with the temperature acquisition module and obtains a sensor value by adopting internal analog-to-digital conversion. The main control unit is connected with a FLASH module which is mainly used for storing configuration parameters, temperature data, internal pressure data and oxygen concentration data. The main control unit is connected with a TF card module which is mainly used for storing acceleration vibration data. The power supply module supplies power to other modules: WIAPA wireless communication module's supply voltage is 3.3V, the wired communication module's of CAN supply voltage is 3.3V, RTC clock module's supply voltage is 3.0V, oxygen concentration acquisition module's supply voltage is 3.3V, acceleration acquisition module's supply voltage is 3.3V, internal pressure acquisition module's supply voltage is 9V, temperature acquisition module's supply voltage is 3.3V, TF card module supply voltage for 2.5V, FLASH module's supply voltage is 3.3V.
The temperature acquisition module adopts a PT100 analog sensor, the precision of the temperature acquisition module is +/-0.1 ℃ (division number 1/3B), the range of the temperature acquisition module is minus 70 to plus 200 ℃, the response time is less than 3s, the temperature sensor conditioning and amplifying circuit adopts a REF192ESZ power supply unit to provide 2.5V precision voltage, 0.1 percent of 1.2k and 80.6 ohms are used as bridge resistors of the temperature sensor to convert the resistors into voltage signals. The AD623 constitutes a first-stage amplifier, the amplification factor 100/10+1 is 11 times, the TLV2252A is used as a second-stage amplifier, the amplification factor 240/100 is 2.4 times, and the measurement range of the sensor is calculated to be-49-110 ℃ when the full-scale range of 0-3.0V is full. The temperature acquisition module regularly acquires the internal temperature of the device according to a set period, and sends out an alarm signal in a wireless or wired mode if the internal temperature exceeds a threshold value.
The inner pressure acquisition module adopts an NPC1210015A3N pressure sensor, the measurement range is 0-15 psi, the measurement precision is +/-0.1%, the power supply current is 1.5mA, and the output voltage is 0-100 mV. The hardware circuit controls the amplification factor of the corresponding amplification circuit by providing an on-board gain resistor and a corresponding amplification circuit mode, a 2.5V resistor and a 5k resistor of REF192ESZ in the pressure sensor conditioning amplification circuit provide a 0.5mA constant current source, the output range of 0-15 psi after the first-stage amplification factor is (0-1.004V @0.5mA), namely the output range of 0-135 kPa is (0-1.3106V @0.5mA), the second-stage amplification factor is 402/100 ═ 4.02 times, namely the output range of 0-135 kPa after the second-stage amplification is (0-5.2684V @0.5mA), the voltage deviation of 2.5V is implemented after the second-stage amplification, namely the output range of 64 kPa-135 kPa is 0-2.7684V, namely the final range of the internal pressure acquisition module is 64 kPa-135 kPa, and the amplified signal is directly connected to an AD conversion port of GD32F 407. The internal pressure acquisition module acquires the internal gas pressure of the device at regular time according to a set period, and sends out an alarm signal in a wireless or wired mode if the internal gas pressure exceeds a threshold value.
The acceleration acquisition module adopts an ADXL345 triaxial high-performance digital accelerometer, the resolution is 13 bits, the measurement range is +/-16 g, the digital output is in a 16-bit binary complement format, and on hardware connection, the acceleration acquisition module occupies GPIO0, GPIO1, GPIO2, GPIO3 and GPIO8 pins of a GD32F407, wherein the GPIO0 is used for an SCL data pin of the ADXL345, the GPIO1 is used for an SDO clock pin, the GPIO2 is used for an SDI clock pin, the GPIO3 is used for a CS pin, the GPIO8 is used for vibration triggering, and IIC communication is adopted between the acceleration acquisition module and the GPIO. The acceleration acquisition module acquires the three-axis vibration acceleration of the device during transportation according to the frequency of 1000Hz, and sends out an alarm signal in a wired mode if the acceleration exceeds a threshold value.
The oxygen concentration acquisition module adopts an SS10-SEN-EDL-2-O2 oxygen sensor, the measurement range is 0-25% VOL, the measurement accuracy is +/-3%, the oxygen concentration acquisition module occupies GPIO12 and GPIO13 pins of GD32F407, wherein the GPIO12 is used for SCL connection of the oxygen concentration acquisition module, the GPIO13 is used for SDA connection of the oxygen concentration acquisition module, and IIC communication is adopted between the two. The oxygen concentration acquisition module acquires the oxygen concentration in the device at regular time according to a set period, and if the oxygen concentration exceeds a threshold value, an alarm signal is sent out in a wireless or wired mode.
The CAN wired communication module adopts an SN65HVD230 chip which is an interface between a CAN controller and a physical bus and provides differential transmission capability to the bus and differential receiving capability to the CAN controller, and the SN65HVD230 is directly connected to CANRXA and CANTXA ports of GD32F 407. The CAN wired communication module is in wired communication with an external vehicle-mounted console, and receives and transmits information such as the running state of the device, the self-checking state of the device, the parameters of the device, the data of each sensor of the device, the operating instructions of the vehicle-mounted console and the like. In order to prevent the input of external dangerous energy, the communication circuit is isolated from the internal signal by the CAN communication interface by using a TLP281_4 optical coupling isolation unit.
The WIAPA wireless communication module adopts a ZANW900 communication module, adopts 3.3V power supply, and communicates with the GD32F407 main chip by adopting an SCI serial port, the baud rate is 9600, wherein TX0 and RX0 ports of the WIAPA wireless communication module are directly connected with SCI XDA and SCI XDA ports of the main chip. The WIAPA wireless communication module is in wireless communication with an external wireless gateway and a computer, and receives and transmits information such as the running state of the device, the self-checking state of the device, the parameters of the device, the data of each sensor of the device, the operation instructions of the computer and the like.
The RTC clock module selects a DS3231SN clock chip, the 24h of the RTC clock module is powered by 3.3V of normal power, and is connected with a CR2 lithium battery through a diode, and when the main power supply is disconnected, the chip is powered by the CR2 lithium battery. On the hardware connection, the clock chip occupies pins GPIO49 and GPIO51 of GD32F407, wherein GPIO49 is used for SCL connection, GPIO51 is used for SDA connection, and standard IIC communication is adopted between the GPIO49 and the GPIO 51. When the device works, the clock information and the corresponding device action are stored in the FLASH module.
SST39VF800 type FLASH memory chips are selected as the FLASH modules, the working voltage of the FLASH memory chips is 2.7-3.6V, and the memory capacity is 512 kbyte. The main chip read-write FLASH adopts 18 address lines and 16 digit lines to implement read-write. The module is mainly used for storing configuration parameters, temperature data, internal pressure data and oxygen concentration data.
The TF card module selects an MD30-004GWD000 type TF memory chip as a memory, the memory capacity of the TF card module is 4G byte, the page size of the TF card module is 2Kbyte, the working voltage is 2.7-3.6V, the working temperature is-40 to +125 ℃, and the GD32F407 reads and writes the TF card by adopting an SPI serial port. The TF card module is mainly used for storing acceleration vibration data.
Referring to fig. 2, when the environment monitoring device in the nitrogen-filled explosive sealing box is stored, a plurality of devices simultaneously start wireless communication, upload data to the same wireless gateway, and perform differentiation through wireless node IDs, and during transportation, a plurality of devices are simultaneously connected to a vehicle-mounted console and perform differentiation through the ID number of the CAN. In the communication process, except for the regularly updated data, each command is initiated by a wireless gateway or a vehicle-mounted console, and a data frame is sent to an environment monitoring device in the nitrogen-filled explosive sealing box, wherein the device is used as a passive response device. Only when the instruction information sent by the master device is received, the corresponding device makes feedback and does not respond to the information of other devices.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A nitrogen-filled explosive seal box internal environment monitoring device is characterized by comprising: a GD32F407 master unit;
the GD32F407 main control unit is connected with a WIAPA wireless communication module, and communication is implemented between the two through an SCIA serial port; the WIAPA wireless communication module is in wireless communication with an external wireless gateway and a computer, and receives and transmits information such as the running state of a device, the self-checking state of the device, the parameters of the device, the data of each sensor of the device, the operation instructions of the computer and the like;
the GD32F407 main control unit is connected with a CAN wired communication module, communication is implemented between the two modules through a CANA port, the CAN wired communication module is in wired communication with an external vehicle-mounted control console, and the operation state of the transceiver, the self-checking state of the device, the parameters of the device, the data of each sensor of the device and the operation instruction information of the vehicle-mounted control console are received and transmitted;
the GD32F407 main control unit is connected with the RTC clock module, and IIC is adopted between the GD32F407 main control unit and the RTC clock module to implement communication;
the GD32F407 main control unit is connected with the oxygen concentration acquisition module, IIC is adopted for communication between the GD32F407 main control unit and the oxygen concentration acquisition module, the oxygen concentration acquisition module acquires the oxygen concentration in the device regularly according to a set period, and an alarm signal is sent out in a wireless or wired mode when the oxygen concentration exceeds a threshold value.
2. The device for monitoring the environment inside the nitrogen-filled explosive sealed box according to claim 1, wherein the GD32F407 main control unit is connected with an acceleration acquisition module, communication is implemented between the acceleration acquisition module and the acceleration acquisition module through an SPI (serial peripheral interface), the acceleration acquisition module acquires the three-axis vibration acceleration of the device during transportation, and an alarm signal is sent out in a wired mode when the acceleration exceeds a threshold value.
3. The device for monitoring the environment inside the nitrogen-filled explosive sealed box according to claim 1 or 2, wherein the GD32F407 main control unit is connected with an internal pressure acquisition module and used for performing analog-to-digital conversion on the obtained device internal pressure analog signals; and according to a set period, acquiring the internal gas pressure of the device at regular time, and sending an alarm signal in a wireless or wired mode when the internal gas pressure exceeds a threshold value.
4. The device for monitoring the environment in the nitrogen-filled explosive sealed box according to claim 1 or 2, wherein the GD32F407 main control unit is connected with a temperature acquisition module, and performs analog-to-digital conversion on the obtained device internal temperature analog signal; the internal pressure acquisition module is used for acquiring the internal gas pressure of the device regularly according to a set period, and if the internal gas pressure exceeds a threshold value, an alarm signal is sent out in a wireless or wired mode.
5. The device for monitoring the environment inside the nitrogen-filled explosive sealed box according to claim 1 or 2, wherein the GD32F407 main control unit is connected with a FLASH module, and the FLASH module is mainly used for storing configuration parameters, temperature data, internal pressure data and oxygen concentration data.
6. The device for monitoring the environment inside the nitrogen-filled explosive sealed box according to claim 1 or 2, wherein the GD32F407 main control unit is connected with a TF card module, and the TF card module is mainly used for storing acceleration vibration data.
7. The apparatus for monitoring the environment inside a nitrogen-filled explosive sealed box according to claim 1 or 2, wherein the apparatus comprises a power module, and the power module supplies power to the rest modules: WIAPA wireless communication module's supply voltage is 3.3V, the wired communication module's of CAN supply voltage is 3.3V, RTC clock module's supply voltage is 3.0V, oxygen concentration acquisition module's supply voltage is 3.3V, acceleration acquisition module's supply voltage is 3.3V, internal pressure acquisition module's supply voltage is 9V, temperature acquisition module's supply voltage is 3.3V, TF card module supply voltage for 2.5V, FLASH module's supply voltage is 3.3V.
8. The apparatus for monitoring the environment inside a nitrogen-filled explosive sealed box according to claim 1 or 2, wherein the CAN communication interface isolates the communication circuit from internal signals by using a TLP281_4 optical coupling isolation unit to prevent the input of external dangerous energy.
9. The apparatus for monitoring the environment inside a nitrogen-filled explosive sealed box according to claim 1 or 2, wherein during storage, a plurality of apparatuses simultaneously start wireless communication, upload data to the same wireless gateway, and perform differentiation by wireless node ID.
10. The apparatus for monitoring the environment inside a nitrogen-filled explosive sealed box according to claim 1 or 2, wherein a plurality of apparatuses are connected to the vehicle console at the same time during transportation, and discrimination is performed by the ID number of CAN.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021331756.1U CN213120889U (en) | 2020-07-09 | 2020-07-09 | Nitrogen-filled explosive sealing box internal environment monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021331756.1U CN213120889U (en) | 2020-07-09 | 2020-07-09 | Nitrogen-filled explosive sealing box internal environment monitoring device |
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| CN213120889U true CN213120889U (en) | 2021-05-04 |
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| CN202021331756.1U Expired - Fee Related CN213120889U (en) | 2020-07-09 | 2020-07-09 | Nitrogen-filled explosive sealing box internal environment monitoring device |
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Granted publication date: 20210504 |