CN108494252A - A kind of Internet of Things NB-IoT super low-power consumption timed power switch circuits and its detection method - Google Patents
A kind of Internet of Things NB-IoT super low-power consumption timed power switch circuits and its detection method Download PDFInfo
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- CN108494252A CN108494252A CN201810414780.2A CN201810414780A CN108494252A CN 108494252 A CN108494252 A CN 108494252A CN 201810414780 A CN201810414780 A CN 201810414780A CN 108494252 A CN108494252 A CN 108494252A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
- G01R31/2834—Automated test systems [ATE]; using microprocessors or computers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
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Abstract
The invention discloses a kind of Internet of Things NB IoT super low-power consumption timed power switch circuits, include the circuit board of shell and setting inside the shell, circuit board is integrated with microprocessor, timer, NB IoT communication modules, combination metal-oxide-semiconductor modules A, combination metal-oxide-semiconductor module B, sensor assembly, 12V batteries, 3.3V power conversion modules, SIM card, 3V lithium batteries, 4V power conversion modules, and timer, NB IoT communication modules, combination metal-oxide-semiconductor module B, sensor assembly and 3.3V power conversion modules are connected with microprocessor；For Internet of Things NB IoT super low-power consumption timed power switch circuits compared with hundred microamperes of conventional power source switching current power consumption figure, lower power consumption is very big, the Internet of Things NB IoT applications particularly suitable for long-time suspend mode.
Description
Technical field
The present invention relates to Internet of Things NB-IoT applied technical fields more particularly to a kind of Internet of Things NB-IoT super low-power consumptions are fixed
When power switch circuit and its detection method.
Background technology
Internet of Things application development has had more than 10 years, and it is the solution party for being directed to specific industry or nonstandardized technique that majority, which uses,
The shortcomings of case, it is low that there are reliabilities, and safety is poor, and Operation and Maintenance is of high cost, and power consumption is big.It can be seen based on industry practice for many years
Go out, a key factor of Internet of Things success development is standardization.It is different from conventional cellular network communication, Internet of Things application
It requires and supports the demands such as magnanimity connection number, low cost, low-power consumption and superpower covering power.
In this context, in September, 2015 formally determines that the project verification of narrowband Internet of Things (NB-IoT) standard, global industry include
50 companies including Huawei play an active part in, and complete standard agreement core in June, 2016, and formally publication is based on 3GPP
1st set of NB-IoT standards system of LTE R13 versions.With the publication of NB-IoT standards, NB-IoT systems technologies and ecological chain
It will new page that is gradually ripe, or Internet of Things development will being opened.NB-IoT systems also are expected to meet the transmission belt in 180kHz
Width is lower to support coverage enhancement (covering power for promoting 20dB), super low-power consumption (5Wh batteries use 10 years for terminal), flood tide whole
Terminate the Low-rate traffic demand of the non-delay sensitive into (single sector can support 50000 terminal connections).
NB-IoT standards are come into being to meet the needs of Internet of Things, product of the home communications giant Huawei as NB-IoT
Pole participant, many departments all play an active part in wherein NB-IoT.Chinese market start it is rapid, China Mobile, China Unicom, in
State's telecommunications has all completed laboratory test, and starts commercialization.Under the promotion of operator, NB-IoT networks will become future
One of mainstream communication network of Internet of Things, with the extension of application scenarios, NB-IoT networks will constantly evolution with meet it is various not
Same demand.
At present Internet of Things NB-IoT using development like a raging fire, a variety of different terminals are come into being.Market at present
On integrated wireless data communication (such as GPRS) in integrated internet-of-things terminal, usually continuous automatic collection sensor information, and
Center for information management is reported to automatically according to preset time interval.This means that equipment is constantly in working condition,
Although there is part-time device controller to be in suspend mode, power consumption is slightly lower, since power conversion module is constantly in work
And there are certain efficiencies for conversion, or it is milliampere to use triode and metal-oxide-semiconductor as its bias current of power switch
Grade, overall power is not still low, and battery (lithium ion can only be used by being difficult to obtain alternating current or solar powered situation to some
Battery either lead-acid accumulator) place of power supply frequently charges the battery or replaces battery and can increase many human costs, spy
It is not the application scenario to some long-time suspend mode, ultralow Consumption is particularly important.
In addition, it is as follows with the most similar technic relization scheme of the present invention, but all exist certain insufficient：
There are static working currents for power supply conversion：Presently, there are power conversion module or chip interior there are biased electricals
Resistance, powers on once powering on, there is certain static working current (or Leakage Current) even if being not turned on making for chip
Energy end, size of current are several microamperes to hundreds of microamperes etc..
LDO power supplys：Static working current is several microamperes of ranks, and there are pressure difference, conversion effects with output end for power input
Rate is very low, and pressure difference is bigger, and efficiency transfer efficiency is lower, and big pressure difference is more used less in general digital circuit.
DC-DC Switching Power Supplies：It can not consider the pressure difference of power input output, transfer efficiency is very high, Switching Power Supply core
Piece MP2560 its static working current (open power supply Enable Pin and non-loaded) is hundreds of microamperes of ranks, when closing power supply Enable Pin
Electric current (being few tens of microamps rank there are biasing resistor)；Switching Power Supply core BD8303MUV pieces, output sourcing current (SOURCE
CURRENT) tens of Naan ranks, sink current (SINK CURRENT) milliampere rank, its quiescent current that works together, which is at least, to be counted
Hundred microamperes.
Therefore it must be controlled using electronic switch when low-power consumption works.
Electronic switch controls power supply：Using triode NPN and PNP mode, triode belongs to current device, it is necessary to exist partially
Resistance is set, bias current is milliampere grade；Using triode and metal-oxide-semiconductor, chopped-off head triode switch is controlled there is also biasing resistor,
Its bias current is milliampere grade, and metal-oxide-semiconductor belongs to voltage devices, and conducting electric current is substantially zeroed, and electric current does not consider generally, whole
Body current power dissipation is milliampere grade；Make that optocoupler or relay can be used as switch, current power dissipation is milliampere grade.
In view of the application of Internet of Things NB-IoT is all timing working, if using the microprocessor of equipment as timer,
Power supply conversion is certainly existed, the work external clock of general purpose microprocessor is number MHz, according to several its suspend mode of MHz clocks
Power consumption is hundreds of microamperes；Be several microamperes according to internal low-speed clock its suspend mode power consumption, along with power supply conversion efficiency and
The bias current of quiescent current and above-mentioned electronic switch, total static current of lcd is in milliampere rank, therefore overall power is still not
It is low.For these reasons, it is necessary to which the electronic switch and timer for designing a super low-power consumption could meet Internet of Things NB-
The application of IoT super low-power consumptions.
Invention content
The purpose of the present invention is to solve defects in the prior art, provide a kind of Internet of Things substantially reducing its power consumption
NB-IoT super low-power consumption timed power switch circuits, to solve problems of the prior art.
To achieve the above object, technical scheme is as follows：
A kind of Internet of Things NB-IoT super low-power consumption timed power switch circuits and its detection method, including shell and setting exist
Circuit board in shell, the circuit board be integrated with microprocessor, timer, NB-IoT communication modules, combination metal-oxide-semiconductor modules A,
Combine metal-oxide-semiconductor module B, sensor assembly, 12V batteries, 3.3V power conversion modules, SIM card, 3V lithium batteries, the conversion of 4V power supplys
Module, the timer, NB-IoT communication modules, combination metal-oxide-semiconductor module B, sensor assembly and 3.3V power conversion modules with
Microprocessor is connected, and the combination metal-oxide-semiconductor modules A, combination metal-oxide-semiconductor module B and 4V power conversion module are connected with 12V batteries
It connects, the timer input terminal connects 3V lithium batteries, output end connection combination metal-oxide-semiconductor modules A, the 3.3V power conversion modules
Input terminal connection combination metal-oxide-semiconductor modules A, the 4V power conversion modules input terminal connection combination metal-oxide-semiconductor module B, output end connect
NB-IoT communication modules are connect, the NB-IoT communication modules input terminal connects SIM card；
The microprocessor is responsible for being communicated with each module, coordinates each module and orderly works；
The timer is clocking capability, using 8kHz crystal oscillator as input clock, it is thorough and with single lithium battery power supply
Bottom solves the problems, such as that the existing quiescent current of power supply conversion causes power consumption big, and operating current is only several microamperes, with microprocessor
It is communicated by PWM；
The NB-IoT communication modules are used to transmit with the communication of upper management center and information；
The microprocessor coordinates each module and orderly works for being communicated with each module.
In order to further realize the present invention, the shell is plastic shell.
In order to further realize the present invention, the combination metal-oxide-semiconductor modules A and combination metal-oxide-semiconductor module B include NMOS tube,
PMOS tube, R1 resistance, R2 resistance, R3 resistance and R4 resistance, control network signal connect R3 resistance and R4 resistance, R3 resistance simultaneously
The poles other foot connection NMOS tube G, the R4 resistance other foot connection poles NMOS tube S connect power cathode, R1 resistance and R2 simultaneously
Resistance connects the poles G of PMOS tube, the poles R2 other foot connection NMOS tube D simultaneously, and the poles R1 other foot connection PMOS tube S connect simultaneously
Input voltage terminal is connect, the poles PMOS tube D are connect with output voltage terminal.
Correspondingly, the present invention also provides a kind of detection sides of Internet of Things NB-IoT super low-power consumptions timed power switch circuit
Method, which is characterized in that include the following steps：
Step 1, timer is not timed out in timing, and timer is not turned on combination metal-oxide-semiconductor modules A switch, the conversion of 3.3V power supplys
Module can not export 3.3V voltages, and timing time one generates 3.3V power supplys, in turn to combination metal-oxide-semiconductor modules A switch is immediately turned on
Wake up microprocessor；
After microprocessor wakes up, combination metal-oxide-semiconductor is opened after the relevant information of microprocessor acquisition sensor assembly for step 2
Module B switches, generate 4V power supplys and power for NB-IoT communication modules, and sensor information is at the same time transmitted to NB-IoT communications
Module is simultaneously sent, once receiving transmission successful information, microprocessor immediately closes off 4V power supplys；
Step 3, microprocessor inform that timer, epicycle periodic duty have been completed by pwm signal, and timer can be with
Combination metal-oxide-semiconductor modules A is closed, power supply 3.3V is closed, immediately closes off microprocessor, only timer is being run on monoblock circuit board
Work waits until always that timing terminates to start a new wheel cycle in time status, and return to step one is handled.
Advantageous effect
The present invention can obtain ultralow power consumption using timer and combination metal-oxide-semiconductor, electric current (only timer work when work
Make) single 3V lithium battery is microampere order, combination metal-oxide-semiconductor conducting 12V batteries are other module for power supply, and the working time is shorter, conducting
Electric current is very small；Single 3V lithium battery of electric current (runs) is microampere order when standby (suspend mode), and combination metal-oxide-semiconductor closes 12V
Battery, no 3.3V outputs, other modules do not consume any electric current of 12V batteries, and standby (suspend mode) time is very long, the two weighted average
Power consumption is very low, and (microcontroller is in standby, power module etc. exists with the power consumptions of several milliamperes traditional of GPRS terminal standbies
Work) it compares, lower power consumption is quite big, the several orders of magnitude of lower power consumption.
Description of the drawings
Fig. 1 is the functional block diagram of Internet of Things NB-IoT super low-power consumptions timed power switch circuit of the present invention；
Fig. 2 is the principle that metal-oxide-semiconductor module is combined in Internet of Things NB-IoT super low-power consumptions timed power switch circuit of the present invention
Block diagram.
Reference sign：
1, microprocessor；2, timer；3, NB-IoT communication modules；4, metal-oxide-semiconductor modules A is combined；5, metal-oxide-semiconductor module is combined
B；6,12V batteries；7,3.3V power conversion modules；8, SIM card；9,3V lithium batteries；10,4V power conversion modules；11, sensor
Module.
Specific implementation mode
The present invention is further described in detail below in conjunction with the accompanying drawings, these attached drawings are simplified schematic diagram, only
Illustrate the basic structure of the present invention in a schematic way, the direction of this specific implementation is using the directions Fig. 1 as standard.
Embodiment one
As Figure 1-Figure 2, Internet of Things NB-IoT super low-power consumptions timed power switch circuit of the present invention includes shell and sets
Circuit board inside the shell is set, wherein：
Shell is plastic shell, and circuit board is integrated with microprocessor 1, timer 2, NB-IoT communication modules 3, combination MOS
Tube module A4, combination metal-oxide-semiconductor module B5, sensor assembly 11,12V batteries 6,3.3V power conversion modules 7, SIM card 8,3V lithiums
Battery 9,4V power conversion modules 10, timer 2, NB-IoT communication modules 3, combination metal-oxide-semiconductor module B5,11 and of sensor assembly
3.3V power conversion modules 7 are connected with microprocessor 1, and combination metal-oxide-semiconductor modules A 4, combination metal-oxide-semiconductor module B5 and 4V power supply turn
Mold changing block 10 is connected with 12V batteries 6；Timer 2 input terminal connects 3V lithium batteries 9, output end connection combination metal-oxide-semiconductor module
A4；7 input terminal of 3.3V power conversion modules connection combination metal-oxide-semiconductor modules A 4；10 input terminal of the 4V power conversion modules connection
Metal-oxide-semiconductor module B5 is combined, output end connects NB-IoT communication modules 3, and 3 input terminal of NB-IoT communication modules connects SIM card
8。
Microprocessor 1 is responsible for being communicated with each module, coordinates each module and orderly works.
Timer 2 is mainly clocking capability, using 8kHz crystal oscillator as input clock, and with single lithium battery power supply,
Thoroughly solve the problems, such as that the existing quiescent current of power supply conversion causes power consumption big, operating current is only several microamperes, with microprocessor
Device 1 is communicated by PWM.
NB-IoT communication modules 3 are used to transmit with the communication of upper management center and information.
Sensor assembly 11 can use different sensors, obtain various useful informations, such as voltage, air pressure, temperature.
3.3V power conversion modules 7 export 3.3V voltages, provide voltage for modules such as microprocessors 1, the 4V power supplys turn
It changes the mold block 10 and exports 4V voltages, be used for NB-IoT communication modules 3.
It includes NMOS tube, PMOS tube, R1 resistance, R2 resistance, R3 to combine metal-oxide-semiconductor modules A 4 and combination metal-oxide-semiconductor module B5
Resistance and R4 resistance, control network signal connect R3 resistance and R4 resistance simultaneously, and the other foot of R3 resistance connects the poles NMOS tube G,
The R4 resistance other foot connection poles NMOS tube S connect power cathode simultaneously, and R1 resistance and R2 resistance connect the G of PMOS tube simultaneously
Pole, the poles R2 other foot connection NMOS tube D, the R1 other foot connections poles PMOS tube S connect Input voltage terminal, PMOS tube D simultaneously
Pole is connect with output voltage terminal；When it is high level to control network signal, the voltage between the poles NMOS tube G and the poles S is more than conducting
Threshold voltage (is more than 0V), and for NMOS tube D pole tensions close to 0V, NMOS tube bias current is microampere order after conducting；At the same time electric
Resistance R1 and R2 is divided, and the voltage between the poles PMOS tube G and the poles S is less than on state threshold voltage (negative value, negative voltage), PMOS tube
Conducting, PMOS tube bias current are microampere order；Voltage is exported from output voltage terminal, since the conducting resistance between the poles D and the poles S is
Tens of milliohms, then the pressure drop for passing through PMOS tube is tens of microvolts (tens of milliohms are multiplied by 1 milliampere), the pressure drop of PMOS tube almost may be used
To ignore, an ideal switch can be used as；When it is low level (0V) to control network signal, NMOS and PMOS are not
Conducting, current power dissipation are essentially 0, can be ignored.
Its detection method is as follows：
Step 1, timer 2 is not timed out in timing, and timer 2 is not turned on combination metal-oxide-semiconductor modules A 4 and switchs, 3.3V power supplys
Conversion module 7 can not export 3.3V voltages, and in addition to timer 2 works normally, remaining module does not work and do not consume electricity, timing
2 internal operation timer of device, timing time one are opened to (EN1 signal levels are got higher by low) combination metal-oxide-semiconductor modules A 4 is immediately turned on
It closes, generates 3.3V power supplys, and then wake up microprocessor 1；
After microprocessor 1 wakes up, (EN2 is opened after the relevant information of the acquisition sensor assembly 11 of microprocessor 1 for step 2
Signal level is got higher by low) combination metal-oxide-semiconductor module B5 switches, it generates 4V power supplys and powers for NB-IoT communication modules 3, it is same with this
When sensor information is transmitted to NB-IoT communication modules 3 and is sent, once receiving transmission successful information, microprocessor 1 is vertical
It carves and closes (EN2 signal levels are lower by height) 4V power supplys；
Step 3, microprocessor 1 inform that timer 2, epicycle periodic duty have been completed by pwm signal, and timer 2 can
With closing (EN1 signal levels are lower by height) combination metal-oxide-semiconductor modules A 4, power supply 3.3V is closed, microprocessor 1 is immediately closed off, it is whole
Only have timer 2 in operation work on block circuit board, wait until that timing terminates to start a new wheel cycle always in time status,
Return to step one is handled.
The present invention can obtain ultralow power consumption using timer and combination metal-oxide-semiconductor, electric current (only timer work when work
Make) single 3V lithium battery is microampere order, combination metal-oxide-semiconductor conducting 12V batteries are other module for power supply, and the working time is shorter, conducting
Electric current is very small, and almost 0, it can be neglected；Single 3V lithium battery of electric current (runs) is microampere when standby (suspend mode)
Grade, combination metal-oxide-semiconductor close 12V batteries, no 3.3V output, and other modules do not consume any electric current of 12V batteries, when standby (suspend mode)
Between it is very long, the two weighted average power consumption is very low, and (microcontroller is in and waits for the power consumptions of several milliamperes traditional of GPRS terminal standbies
Machine state, power module etc. are working) it compares, lower power consumption is quite big, the several orders of magnitude of lower power consumption.
The foregoing is merely the better embodiments of the present invention, and the invention is not limited in the above embodiments, are implementing
There may be the small structural modifications in part in the process, if the various changes or modifications of the present invention are not departed from the essence of the present invention
God and range, and belong within the scope of the claim and equivalent technologies of the present invention, then the present invention is also intended to comprising these changes
And modification.
Claims (4)
1. a kind of Internet of Things NB-IoT super low-power consumptions timed power switch circuit, which is characterized in that outside including shell and setting
Circuit board in shell, the circuit board are integrated with microprocessor, timer, NB-IoT communication modules, combination metal-oxide-semiconductor modules A, group
Close metal-oxide-semiconductor module B, sensor assembly, 12V batteries, 3.3V power conversion modules, SIM card, 3V lithium batteries, 4V power supply moduluss of conversion
Block, the timer, NB-IoT communication modules, combination metal-oxide-semiconductor module B, sensor assembly and 3.3V power conversion modules with it is micro-
Processor is connected, and the combination metal-oxide-semiconductor modules A, combination metal-oxide-semiconductor module B and 4V power conversion module are connected with 12V batteries
It connects, the timer input terminal connects 3V lithium batteries, output end connection combination metal-oxide-semiconductor module
A, the 3.3V power conversion modules input terminal connection combination metal-oxide-semiconductor modules A, the 4V power conversion modules input terminal connect
Combination metal-oxide-semiconductor module B is met, output end connects NB-IoT communication modules, and the NB-IoT communication modules input terminal connects SIM card；
The microprocessor is responsible for being communicated with each module, coordinates each module and orderly works；
The timer is clocking capability, is communicated by PWM with microprocessor；
The NB-IoT communication modules are used to transmit with the communication of upper management center and information；
The microprocessor coordinates each module and orderly works for being communicated with each module.
2. Internet of Things NB-IoT super low-power consumptions timed power switch circuit according to claim 1, which is characterized in that described
Shell is plastic shell.
3. Internet of Things NB-IoT super low-power consumptions timed power switch circuit according to claim 1, which is characterized in that described
It includes NMOS tube, PMOS tube, R1 resistance, R2 resistance, R3 resistance and R4 electricity to combine metal-oxide-semiconductor modules A and combination metal-oxide-semiconductor module B
Resistance, control network signal connect R3 resistance and R4 resistance simultaneously, and the poles R3 resistance other foot connection NMOS tube G, R4 resistance is in addition
The one foot connection poles NMOS tube S connect power cathode simultaneously, and R1 resistance and R2 resistance connect the poles G of PMOS tube, R2 other one simultaneously
Foot connects the poles NMOS tube D, and the R1 other foot connections poles PMOS tube S connect Input voltage terminal, the poles PMOS tube D and output voltage simultaneously
End connection.
4. a kind of detection method for Internet of Things NB-IoT super low-power consumptions timed power switch circuit described in claim 1,
It is characterized by comprising the following steps：
Step 1, timer is not timed out in timing, and timer is not turned on combination metal-oxide-semiconductor modules A switch, 3.3V power conversion modules
3.3V voltages can not be exported, timing time one generates 3.3V power supplys, and then wake up to combination metal-oxide-semiconductor modules A switch is immediately turned on
Microprocessor；
After microprocessor wakes up, combination metal-oxide-semiconductor module is opened after the relevant information of microprocessor acquisition sensor assembly for step 2
B is switched, and is generated 4V power supplys and is powered for NB-IoT communication modules, sensor information is at the same time transmitted to NB-IoT communication modules
And send, once receiving transmission successful information, microprocessor immediately closes off 4V power supplys；
Step 3, microprocessor inform that timer, epicycle periodic duty have been completed by pwm signal, and timer can close
Metal-oxide-semiconductor modules A is combined, power supply 3.3V is closed, immediately closes off microprocessor, only timer is in operation work on monoblock circuit board
Make, waits until that timing terminates to start a new wheel cycle always in time status, return to step one is handled.
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| CN110588542A (en) * | 2019-09-09 | 2019-12-20 | 洛阳嘉盛电源科技有限公司 | Low-power-consumption self-awakening control circuit and control method for vehicle-mounted power supply |
| CN111127818A (en) * | 2019-12-06 | 2020-05-08 | 浙江大邦科技有限公司 | NB-IoT smoke sensing control system |
| CN112965422A (en) * | 2021-02-23 | 2021-06-15 | 山东晶捷信息科技有限公司 | Internet of things remote control system with ultra-low power consumption |
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| CN110209090A (en) * | 2019-06-14 | 2019-09-06 | 国网江苏省电力有限公司常州供电分公司 | Intelligent cable well lid |
| CN110588542A (en) * | 2019-09-09 | 2019-12-20 | 洛阳嘉盛电源科技有限公司 | Low-power-consumption self-awakening control circuit and control method for vehicle-mounted power supply |
| CN111127818A (en) * | 2019-12-06 | 2020-05-08 | 浙江大邦科技有限公司 | NB-IoT smoke sensing control system |
| CN112965422A (en) * | 2021-02-23 | 2021-06-15 | 山东晶捷信息科技有限公司 | Internet of things remote control system with ultra-low power consumption |
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Application publication date: 20180904 |