CN207817469U - Remote control intelligent dimming power supply based on NB-IoT wireless technologys - Google Patents
Remote control intelligent dimming power supply based on NB-IoT wireless technologys Download PDFInfo
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- CN207817469U CN207817469U CN201820146659.1U CN201820146659U CN207817469U CN 207817469 U CN207817469 U CN 207817469U CN 201820146659 U CN201820146659 U CN 201820146659U CN 207817469 U CN207817469 U CN 207817469U
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Abstract
Current intelligent power and remote control power, existence range is small, be easy to be disturbed, power consumption is big, or the problems such as operation and high maintenance cost, limits low interruption and the development and application of the high-end intelligent power in part and remote control power to a certain extent.The utility model provides a kind of remote control intelligent dimming power supply based on NB IoT wireless technologys, including AC DC modules, DC power supply conversion module, power monitoring module, dimming controlling module, processor control module, storage and information collocation module, pattern and Local Control Module, NB IoT wireless modules, remote control center module and lamp terminal module.This technology provides the integrated intelligent power solutions of a kind of collection control, selection, light modulation, remote wireless control may be implemented, parameters can be easily configured；Not only have the characteristics that long transmission distance, wide coverage, be not easy to be disturbed, reliability is high, low in energy consumption, long lifespan, also have the characteristics that operation, maintenance cost are low.
Description
Technical field
The utility model is related to the driving power technical fields of semiconductor lighting, relate in particular to a kind of based on NB-IoT
The remote control intelligent dimming power supply of wireless technology.
Background technology
Intelligent power and remote control power and intelligent lighting power supply are more and more, more and more common, increasingly advanced, give
People’s lives bring great convenience.Current intelligent power or remote control power is substantially based on pervious old
Technology, to realize intelligence and the remote control of some power supplys, although facilitating everybody use, in some aspects also
Have the shortcomings that insufficient or fatal.Based on bluetooth, the conventional wireless techniques such as wifi and design intelligence and remote control electricity
Source, due to technical characteristic of conventional wireless techniques itself：Generally acknowledged, coverage area is small, and the shadow by object is easy in transmission process
Ring, signal decaying it is big the problems such as so that be based on bluetooth, the conventional wireless techniques such as wifi and design intelligence and remote control electricity
There is also the above problems in source.Recently, due to the rise of Internet of Things, some novel Radio Transmission Technologys are widely used, such as
Zigbee, Z-wave etc. new wireless communication technique is also gradually used in above intelligent power and remote control power, relative to biography
The wireless communication technique of system, new wireless communication technique, not only networking is more convenient, but also power consumption is lower, on the basis of certain
The deficiency for improving conventional wireless techniques is suitable for use on intelligent power and remote control power.Although than being based on conventional wireless
Technology and the power supply that designs is good, but there are also deficiencies, it is well known that the wireless technologys such as zigbee, Z-wave, transmission range
Short, power consumption is relatively high, needs to improve them with some new wireless technologys.It is designed based on novel radio technology Lora
Intelligent power and remote control power, have wide coverage, be not easy in transmission process to be disturbed, signal decaying is small, transmission
Apart from the features such as remote, low in energy consumption, it is suitable as the intelligence and remote control power of middle and high end.But for the sum of some low costs
Cost than more sensitive application for, cost is relatively high, cannot share existing network, needs independent networking, operation and dimension
It is relatively high to protect cost.The wireless technology for needing some new improve they and supplement market blank.
In conclusion current intelligent power and remote control power, existence range is small, be easy to be disturbed, power consumption is big, or
The problems such as being operation and high maintenance cost, limits low interruption and the high-end intelligent power in part and remote control to a certain extent
The development and application of power supply.
NB-IoT (NarrowBandInternetofThings, NB-IoT, also known as narrowband Internet of Things), is by 3GPP standards
Change a kind of technical standard for defining of tissue, is a kind of narrow radio frequency technology aiming at Internet of Things design, as Internet of Things and output
The new generation of wireless communication technology, relative to forenamed Radio Transmission Technology, typical feature be apart from remote, low in energy consumption,
Existing mobile communications network can be utilized, Lora networks is compared, not only has the advantages that it, but also its disadvantage can be overcome, is runed
And maintenance cost is relatively low.Wireless technology NB-IoT based on novel Internet of Things standard and the intelligent power and remote control designed
Power supply, both than the intelligence and remote control power that are designed based on conventional wireless techniques, coverage area is big, is not easy in transmission process
It is influenced by object, signal decaying is smaller etc.；Again than be based on zigbee, wireless communication technique new Z-wave etc. and design
Intelligence and remote control power, wide coverage, long transmission distance, low in energy consumption etc.；More than being based on novel radio technology Lora and
The intelligent power and remote control power of design, operation are low with maintenance cost.Wireless technology NB- based on novel Internet of Things standard
IoT and the intelligent power and remote control power that design not only have wide coverage, the shadow by object is not easy in transmission process
Ring, signal is decayed small, long transmission distance, it is low in energy consumption the features such as, and having can utilize existing network, operation low with maintenance cost etc.
Feature is suitable as the intelligence and remote control power of middle and high end.
Invention content
For the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a kind of intelligence and remote controls
Adjustable light power supply, novel wireless communication technique NB-IoT can be applied to carry out the parameters of remote control power.It can be with
It is convenient to carry out power switch, the functions such as the selection of power monitoring electric power outputting current and light modulation.
In order to solve the above technical problems, the utility model provides a kind of remote control intelligence based on NB-IoT wireless technologys
Energy dimming power source, including：AC-DC module, DC power supply conversion module, power monitoring module, dimming controlling module, processor control
Molding block, storage and information collocation module, pattern and Local Control Module, NB-IoT wireless modules, remote control center module
And lamp terminal module,
The AC-DC module, for realizing the 220V electric mains of input to be converted to the work(of constant low-voltage DC
Can, output end is connected with the power monitoring module, DC power supply conversion module and dimming controlling module respectively；
The DC power supply conversion module includes DC power supply conversion module I and DC power supply conversion module II, described straight
Power conversion module I is flowed, for the DC voltage exported in AC-DC module to be converted to the 5V constant voltages needed for system,
Output end is connected with the power monitoring module, processor control module and storage and information collocation module respectively, is upper
It states modules and power supply is provided；The DC power supply conversion module II, for converting the DC voltage exported in AC-DC module
For 4V constant DC voltages, output end is connected with NB-IoT wireless modules, is individually for NB-IoT wireless modules and provides power supply.
The output end of the power monitoring module is connected with processor control module, for realizing real-time monitoring electric energy work(
The data of monitoring are sent to the CPU in processor control module by the function of rate and monitoring Energy-saving Data, and CPU is carried out at correlation
After reason, electric energy and energy-saving information are recorded and reported；
The dimming controlling module is connected with AC-DC module, processor control module and lamp terminal module respectively,
Then PWM dimming control signals for receiving the transmission of processor control module generate the constant DC current of tunable optical, go
Drive the lamp terminal module of outside；
The processor control module respectively with the power monitoring module, storage and information collocation module, pattern and this
Ground control module, NB-IoT wireless modules and dimming controlling module are connected, for controlling and coordinating entire remote control intelligence
The normal work and data processing function of power-supply system, the number for being sent remote control center module by NB-IoT wireless modules
It is believed that after breath parsing, various data processings and control are carried out, then exporting to illumination by dimming controlling module adjusting power supply
Terminal module, and local system working condition and information are sent to storage and after information collocation module carries out storage record, then
It is sent to remote control center module by NB-IoT wireless modules；
The storage and information collocation module are connect with processor control module, are used for storage system related data and configuration
Information；
The pattern and Local Control Module are connected with the processor control module, are controlled and long-range control for local
The switching of mode processed, the two kinds of control models realized remote control and locally controlled, enhancing remote control intelligent power system
Compatibility and reliability；
The NB-IoT wireless modules are connected with the processor control module and remote control center module respectively, use
In the information for receiving remote control center module, the CPU in processor control module is then sent the data to, and will processing
The information of CPU is sent to remote control center in device control module；
The remote control center module is the external module of long-distance intelligent power-supply system, realizes remote control service work(
Can, it is communicated with the NB-IoT wireless modules；
The lamp terminal module is the external module of long-distance intelligent power-supply system, as long-distance intelligent power-supply system
Load, is connected with the dimming controlling module.
Preferably, the AC-DC module includes front-end protection circuit connected in sequence, codan, rectifying and wave-filtering
The output end of circuit, surge absorbing circuit and power control circuit, the surge absorbing circuit and power control circuit respectively with
The input terminal of transformer isolation circuit for power conversion connects, and output end and the output of the transformer isolation circuit for power conversion are filtered
Wave circuit is connected with protection circuit.
The remote control intelligent dimming power supply based on NB-IoT wireless technologys of the utility model provides a kind of collection control
The integrated intelligent power solution of system, selection, light modulation, may be implemented remote wireless control, parameters can be convenient
It is configured, such as power switch, power supply output selection, electric power outputting current selection and light modulation etc.；Utilize novel wireless communication skill
Art NB-IoT not only has long transmission distance, wide coverage, is not easy to be disturbed, the spies such as reliability is high, low in energy consumption, long lifespan
Point also has the characteristics that operation, maintenance cost are low.
Description of the drawings
Fig. 1 is the remote control intelligent dimming circuit construction of electric power frame based on NB-IoT wireless technologys of the utility model
Figure；
Fig. 2 is the circuit diagram of AC-DC module in the present embodiment；
Fig. 3 is the circuit diagram of DC power supply conversion module in the present embodiment；
Fig. 4 is the circuit diagram of power monitoring module in the present embodiment；
Fig. 5 is the circuit diagram of dimming controlling module in the present embodiment；
Fig. 6 is the circuit diagram of processor control module in the present embodiment；
Fig. 7 is the circuit diagram of storage and information collocation module in the present embodiment；
Fig. 8 is the circuit diagram of pattern and Local Control Module in the present embodiment；
Fig. 9 is the circuit diagram of NB-IoT wireless modules and its power supply in the present embodiment.
Specific implementation mode
Specific embodiment of the present utility model is described in detail below in conjunction with the accompanying drawings：
As shown in Figure 1, the remote control intelligent dimming power supply based on NB-IoT wireless technologys of the utility model, including：
AC-DC module 1, DC power supply conversion module 2, power monitoring module 3, dimming controlling module 4, processor control module 5, storage
And information collocation module 6, pattern and Local Control Module 7, NB-IoT wireless modules 8, remote control center module 9 and illumination
Terminal module 10,
The AC-DC module 1, for realizing the 220V electric mains of input to be converted to the work(of constant low-voltage DC
Can, output end is connected with the power monitoring module 3, DC power supply conversion module 2 and dimming controlling module 4 respectively；
The DC power supply conversion module 2 includes DC power supply conversion module I21 and DC power supply conversion module II22, institute
DC power supply conversion module I21 is stated, it is constant for the DC voltage exported in AC-DC module 1 to be converted to the 5V needed for system
Voltage, output end respectively with the power monitoring module 3, processor control module 5 and storage and 6 phase of information collocation module
Connection, power supply is provided for above-mentioned modules；The DC power supply conversion module II22, for will be exported in AC-DC module
DC voltage is converted to 4V constant DC voltages, and output end is connected with NB-IoT wireless modules, and it is wireless to be individually for NB-IoT
Module provides power supply.
The output end of the power monitoring module 3 is connected with processor control module 5, for realizing real-time monitoring electric energy
The data of monitoring are sent to the CPU in processor control module 5 by the function of power and monitoring Energy-saving Data, and CPU carries out related
After processing, electric energy and energy-saving information are recorded and reported；
The dimming controlling module 4 respectively with 10 phase of AC-DC module 1, processor control module 5 and lamp terminal module
Then connection, the PWM dimming control signals for receiving the transmission of processor control module 5 generate the constant direct current of tunable optical
Electric current goes the lamp terminal module 10 of driving outside；
The processor control module 5 respectively with the power monitoring module 3, storage and information collocation module 6, pattern and
Local Control Module 7, NB-IoT wireless modules 8 and dimming controlling module 4 are connected, for controlling and coordinating entire remote control
The normal work and data processing function of intelligent power system are sent out remote control center module 9 by NB-IoT wireless modules 8
After the data information parsing sent, various data processings and control are carried out, the output of power supply is then adjusted by dimming controlling module 4
To lamp terminal module 10, and local system working condition and information are sent to storage and information collocation module carries out storage note
After record, then remote control center module 9 is sent to by NB-IoT wireless modules 8；
The storage and information collocation module 6 are connect with processor control module 5, for storage system related data and are matched
Confidence ceases；
The pattern and Local Control Module 7 are connected with the processor control module 5, for local control and remotely
The switching of control mode, the two kinds of control models realized remote control and locally controlled enhance remote control intelligent power system
Compatibility and reliability；
The NB-IoT wireless modules 8 are connected with the processor control module 5 and remote control center module 9 respectively
It connecing, then the information for receiving remote control center module 9 sends the data to the CPU in processor control module 5, with
And the information of CPU in processor control module 5 is sent to remote control center；
The remote control center module 9 is the external module of long-distance intelligent power-supply system, realizes remote control service work(
Can, it is communicated with the NB-IoT wireless modules 8；
The lamp terminal module 10 is the external module of long-distance intelligent power-supply system, as long-distance intelligent power-supply system
Load, be connected with the dimming controlling module 4.
The AC-DC module 1 includes front-end protection circuit 11 connected in sequence, codan 12, rectifying and wave-filtering electricity
Road 13, surge absorbing circuit 14 and power control circuit 15, the output of the surge absorbing circuit 14 and power control circuit 15
End connect respectively with the input terminal of transformer isolation circuit for power conversion 16, the transformer isolation circuit for power conversion 16 it is defeated
Outlet is connect with output filter circuit and protection circuit 17.
As shown in Fig. 2, alternating current after current-limiting protection circuit F1 fuses, is protected with varistor MOV1 composition surge voltages
Circuit；Negative tempperature coefficient thermistor R6 is cold start-up current-limiting resistance, can effectively inhibit the surge voltage generated when booting
The surge current of formation.Alternate safety capacitance CX1, filters out a part of DM EMI；Safe Resistance R2 and R3, for preventing power supply
When line plug, cause power-line plug long charged due to the charge and discharge process of CX1 capacitances；Between common mode inductance LF1 and phase ground
Safety capacitance CY1, CY2 are mainly used to suppression common mode interference, form EMI filter circuit.
Rectifier bridge D2 is made into exchange the direct current of pulsation, is further filtered through capacitance C7, and R8 is power supply control chip
U1 start-up circuit current-limiting resistances.When work, by transformer auxiliary winding T1B through resistance R11 current limlitings, diode D6 rectifications, C9 and
After C10 filtering, it is powered to U1.R3, C2, D5 form RCD absorbing circuits, and mos pipes and chip is protected not to be broken down by high-voltage.Become
Depressor T1A armature windings connect the drain electrode of mos pipes in U1, and switching circuit is formed with the current-limiting resistance R13 at the ends CS.Transformer T1A times
HF switch voltage is become DC voltage by grade winding through D1, C3, C4 rectifying and wave-filtering.R1 and C1 is absorbing circuit, L1, C5, C6
Secondary filtering circuit is formed, R7, R14 and U3 form voltage sample and error amplifying circuit, feed back to U1 and carry out voltage adjusting.C8
It is loop compensation circuit with R12, adjusts the stability of loop, R9 and the current-limiting resistance that R10 is U2 and U3.Optocoupler U2 is isolation electricity
Road, it is ensured that primary and secondary electrical isolation gives the feedback pin of U1 by the error signal of output after C11 is filtered, and carries out control tune
Section.Transient Suppression Diode D3 is overvoltage crowbar, and R4 and D4 are power indicating circuit, and CY3 is primary and secondary safety protection electricity
Hold.
As shown in figure 3, input power through C12 and C13 filtering after, into the input pin of LDO power supply chips U4, through U4 tune
5V DC voltages are exported after section, C14, C15, C16 are output filter capacitor.
As shown in figure 4, power-sensing circuit is made of current sampling resistor R15 and precision instrument amplifier U5, adopted by R15
The supply voltage of sample is sent to the positive-negative input end of U5 after magnetic bead L4 and L5 filter out interference, after U5 enhanced processings, by U5
6 pins output, be sent to processor AD pins carry out sampling processing.R19 be instrument put U5 amplification factors control resistance, L3,
C18, C19 are that instrument puts U5 electric source filter circuits, and L6 is that instrument puts U5 earth signal interference filtering inductance.
As shown in figure 5, adjusting control circuit is made of tunable optical constant-current driven chip U6 and peripheral components.C20 and C21 are
Dimmable LED constant-current driven chip U6 feeder ear input filter capacitors.Afterflow and rectification circuit, R16 and R17 are formed by L2, D7
Feedback sampling circuit is formed, R18 is current-limiting resistance, and PMOS tube Q1 provides high-speed switch effect for circuit, and C17 and C22 are filtering
Circuit, C23, C24 and R20 form U6 match circuits.Pwm signal is inputted by 9 pins to U6, is controlled, is carried out by processor
Output current controls, and reaches light modulation effect.2 tunable optical constant current output terminal of terminals P.
As shown in fig. 6, processor control centre circuit is by technical grade anti-interference process device U8 and peripheral component and debugging
Mouth P3 compositions.L7, L9, C26, C27, C28 form U8 electric source filter circuits.D13 and R26 forms system running indicator circuit.
R25 exports for pwm signal, controls the build-out resistor of light adjusting circuit.P3 terminals are the debugging interface of processor U8.The pin 2 of U8,
3,6,7,16 for pattern and local control circuit control signal, pin 10,12 and the NB-IOT Wireless remote control circuits of U8
RS232 communications are carried out, the pin 14,15,17 of U8 is the control signal of NB-IOT Wireless remote control circuits.The pin 4 of U8,
18,19 are connected for debugging signal with P3, and the pin 11,13 of U8 is the IIC communication signals of storage and configuration information circuit, the pipe of U8
Foot 8 is the monitoring signals of power monitoring circuit.
As shown in fig. 7, storage and configuration information circuit are made of eeprom memory U7 and related component.C25 is U7
Power filtering capacitor, R21 and R22 are the pull-up resistor of the clock line and data line of iic bus, R23 and R24 composition write-protect electricity
Road.U7 is communicated through iic bus and processor, carries out data storage and the storage of configuration information.
As shown in figure 8, pattern and local control circuit are by self- recoverage insurance PPTC, Transient Suppression Diode TVS and terminal
P4 is formed.PPTC (F2, F3, F4, F5, F6), TVS (D8, D9, D10, D11, D12), the surge of L8 compositions and electrostatic inhibit electricity
Road.
As shown in figure 9, NB-IoT Wireless remote controls circuit is by NB-IoT wireless modules U9 and peripheral component and antenna
Composition.C29, C30, C31 are U9 power filtering capacitors.The pin 1,2,5 of U9 is connect with processor to be controlled, the pin 3 of U9,
4 be RS232 serial ports, is connect with the serial ports of processor, carries out data transmission and handle.R27, R28, R29, R30, R31 are signal
Lines matching resistance.Antenna is external.The power supply of U9 modules is separately provided by U10 circuits.Input power is filtered through C32 and C33
Afterwards, into the input pin of LDO power supply chips U10,4V DC voltages are exported after U10 is adjusted, C34, C35, C36 are that output is filtered
Wave capacitance.
NB-IOT wireless networks are made of terminal node a, basic point b, public network and application server c etc..
Above-mentioned combination attached drawing is explained in detail the embodiment of the utility model, but the present invention is not limited to above-mentioned
Embodiment, one skilled in the relevant art within the scope of knowledge, can also make many variations to it.
Claims (2)
1. a kind of remote control intelligent dimming power supply based on NB-IoT wireless technologys, which is characterized in that including：AC-DC module
(1), DC power supply conversion module (2), power monitoring module (3), dimming controlling module (4), processor control module (5), deposit
Storage and information collocation module (6), pattern and Local Control Module (7), NB-IoT wireless modules (8), remote control center module
(9) and lamp terminal module (10),
The AC-DC module (1), for realizing the 220V electric mains of input to be converted to the work(of constant low-voltage DC
Can, output end respectively with the power monitoring module (3), DC power supply conversion module (2) and dimming controlling module (4) phase
Connection；
The DC power supply conversion module (2) includes DC power supply conversion module I (21) and DC power supply conversion module II (22),
The DC power supply conversion module I (21), for being converted to the DC voltage exported in AC-DC module (1) needed for system
5V constant voltages, output end respectively with the power monitoring module (3), processor control module (5) and storage and information
Configuration module (6) is connected, and power supply is provided for above-mentioned modules；The DC power supply conversion module II (22) is used for AC-
The DC voltage exported in DC modules is converted to 4V constant DC voltages, and output end is connected with NB-IoT wireless modules, single
Solely power supply is provided for NB-IoT wireless modules；
The output end of the power monitoring module (3) is connected with processor control module (5), for realizing real-time monitoring electric energy
The data of monitoring are sent to the CPU in processor control module (5) by the function of power and monitoring Energy-saving Data, and CPU carries out phase
After the processing of pass, electric energy and energy-saving information are recorded and reported；
The dimming controlling module (4) respectively with AC-DC module (1), processor control module (5) and lamp terminal module
(10) it is connected, then the PWM dimming control signals for receiving processor control module (5) transmission generate the perseverance of tunable optical
Fixed DC current goes the lamp terminal module (10) of driving outside；
The processor control module (5) respectively with the power monitoring module (3), storage and information collocation module (6), pattern
And Local Control Module (7), NB-IoT wireless modules (8) and dimming controlling module (4) are connected, it is entire for controlling and coordinating
The normal work and data processing function of remote control intelligent power system, by NB-IoT wireless modules (8) by remote control
After the data information parsing that center module (9) is sent, various data processings and control are carried out, dimming controlling module is then passed through
(4) it adjusts exporting for power supply and gives lamp terminal module (10), and local system working condition and information are sent to storage and letter
After breath configuration module carries out storage record, then remote control center module (9) is sent to by NB-IoT wireless modules (8)；
The storage and information collocation module (6) are connect with processor control module (5), for storage system related data and are matched
Confidence ceases；
The pattern and Local Control Module (7) are connected with the processor control module (5), for local control and remotely
The switching of control mode, the two kinds of control models realized remote control and locally controlled enhance remote control intelligent power system
Compatibility and reliability；
The NB-IoT wireless modules (8) are connected with the processor control module (5) and remote control center module (9) respectively
It connects, the information for receiving remote control center module (9), then sends the data in processor control module (5)
CPU, and the information of CPU in processor control module (5) is sent to remote control center；
The remote control center module (9) is the external module of long-distance intelligent power-supply system, realizes remote control service work(
Can, it is communicated with the NB-IoT wireless modules (8)；
The lamp terminal module (10) is the external module of long-distance intelligent power-supply system, as long-distance intelligent power-supply system
Load, is connected with the dimming controlling module (4).
2. the remote control intelligent dimming power supply according to claim 1 based on NB-IoT wireless technologys, which is characterized in that
The AC-DC module (1) includes front-end protection circuit (11) connected in sequence, codan (12), current rectifying and wave filtering circuit
(13), surge absorbing circuit (14) and power control circuit (15), the surge absorbing circuit (14) and power control circuit
(15) output end is connect with the input terminal of transformer isolation circuit for power conversion (16) respectively, and the transformer isolation power turns
The output end for changing circuit (16) is connect with output filter circuit and protection circuit (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820146659.1U CN207817469U (en) | 2018-01-29 | 2018-01-29 | Remote control intelligent dimming power supply based on NB-IoT wireless technologys |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820146659.1U CN207817469U (en) | 2018-01-29 | 2018-01-29 | Remote control intelligent dimming power supply based on NB-IoT wireless technologys |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110139401A (en) * | 2019-06-06 | 2019-08-16 | 超讯通信股份有限公司 | A kind of small base station of included NB wireless communication remote maintenance |
| CN113064385A (en) * | 2019-12-31 | 2021-07-02 | 上海辰竹仪表有限公司 | Industrial mechanical safety interface and system based on NB-IoT technology |
-
2018
- 2018-01-29 CN CN201820146659.1U patent/CN207817469U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110139401A (en) * | 2019-06-06 | 2019-08-16 | 超讯通信股份有限公司 | A kind of small base station of included NB wireless communication remote maintenance |
| CN113064385A (en) * | 2019-12-31 | 2021-07-02 | 上海辰竹仪表有限公司 | Industrial mechanical safety interface and system based on NB-IoT technology |
| CN113064385B (en) * | 2019-12-31 | 2024-05-28 | 上海辰竹仪表有限公司 | Industrial mechanical security interface and system based on NB-IoT technology |
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