CN104201773A - Distribution automation terminal provided with standby power source system and used under low temperature environment - Google Patents
Distribution automation terminal provided with standby power source system and used under low temperature environment Download PDFInfo
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- CN104201773A CN104201773A CN201410408046.7A CN201410408046A CN104201773A CN 104201773 A CN104201773 A CN 104201773A CN 201410408046 A CN201410408046 A CN 201410408046A CN 104201773 A CN104201773 A CN 104201773A
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- 238000013461 design Methods 0.000 claims abstract description 13
- 230000008859 change Effects 0.000 claims abstract description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 4
- 239000004065 semiconductor Substances 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 238000004146 energy storage Methods 0.000 description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 239000003792 electrolyte Substances 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 210000000481 breast Anatomy 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 150000003376 silicon Chemical class 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000008485 antagonism Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000020411 cell activation Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/12—Energy storage units, uninterruptible power supply [UPS] systems or standby or emergency generators, e.g. in the last power distribution stages
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/248—UPS systems or standby or emergency generators
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- Stand-By Power Supply Arrangements (AREA)
Abstract
The invention relates to a distribution automation terminal provided with a standby power source and used under a low temperature environment. The distribution automation terminal provided with the standby power source and used under the low temperature environment is characterized in that a power source control module supplies electricity to a CPU (central processing unit) of a device for converting an electric current output by a power source of an efficient low temperature resistance power module into a 5V direct current, a distribution automation terminal core unit is designed in double CPU mode, two CPU chips BF518 and BF533 are industrial grade chips, the two CPU chips are embedded into an industrial grade design circuit, resistors of R11, R12 and R13 and a potential transformer PT100 in a temperature collection module form a sensor measuring bridge, a transmission line TL431 stabilizes voltage of an input end of the sensor measuring bridge, the bridge arm resistor R13 is adjusted so as to change the magnitude of a differential voltage signal output to an operational amplifier, and the differential voltage signal is used for zero setting. The distribution automation terminal provided with the standby power source and used under the low temperature environment has the advantages of being long in cycle life, good in high and low temperature performance, and high in capacity under low temperature, and keeping the capacity above 80% under the condition that environment temperature is minus 40 degree centigrade, and furthermore can normally work within a range from minus 40 degree centigrade to 70 degree centigrade, has a temperature compensation function, and can normally work in a range from minus 50 degree centigrade to 70 degree centigrade.
Description
Technical field
The present invention relates to the distribution power automation terminal that possesses backup power system under a kind of low temperature environment, belong to Power System and its Automation field.
Background technology
Distribution Automation Construction is the inexorable trend of following intelligent grid development.In electrical power distribution automatization system, most of terminal core cells can normally be worked at normal temperatures, meet all technical of distribution terminal in intelligent grid is built.But, under extremely frigid zones low temperature environment, tend to the phenomenon that appearance cannot normally start, have a strong impact on electrical power distribution automatization system in popularization and the construction of high latitude area.So, naturally just produced antagonism low temperature ability strong, the normally directly active demand of the novel distribution terminal core cell of cold start-up of low temperature environment.
Due in distribution automatic system, most of terminals are all to disperse to install, and there is no special direct-current cabinet power supply.Therefore the distribution power automation terminal of, locating to install as on-pole switch, ring main unit, switching station etc. must be furnished with back-up source.Conventional distribution terminal back-up source adopts lead acid accumulator power supply mostly at present.Working properly under normal temperature, energy storage capacity is large, can meet the technical indicator of repeatedly breaker tripping and closing operation.But exist working life short, shortcoming that at low temperatures can not normal power supply, has had a strong impact on the Large scale construction of electrical power distribution automatization system.Distribution power automation terminal cannot normally start in extremely frigid zones device core unit such as the north situation that causes distribution network to occur that mass termination goes offline and happen occasionally.The problem that at present Intelligent power distribution terminal core cell and backup power system cannot normally directly cold start-up cause distribution terminal and distribution network normally to move at low temperature environment.
Summary of the invention
The object of the present invention is to provide the distribution power automation terminal that possesses backup power system under a kind of low temperature environment.Distribution power automation terminal core cell is chosen the technical grade core cell process chip that anti-low temperature ability is strong, make this terminal can be under-40 ° of C low temperature environments directly cold start-up.Distribution terminal back-up source adopts silicon energy storage device, and silicon energy storage device has and has extended cycle life, and high temperature performance is good, and under low temperature, capacity is high, and under ° C condition of environment-40, capacity still can remain on more than 80%; Within the scope of-40 ℃ to+70 ℃, can normally work, the two unified complete formation be possessed to the distribution power automation terminal of back-up source, make its function that possesses temperature-compensating, can within the scope of-50 ℃ to+70 ℃, normally work.
Technical scheme of the present invention is achieved in that the distribution power automation terminal that possesses backup power system under a kind of low temperature environment, by temperature collect module and energy supply control module, formed, it is characterized in that: energy supply control module is that its power supply of Effective Anti low temp. electric source module turns 5V/DC device CPU power supply; Distribution power automation terminal core cell adopts two CPU designs, two cpu chip BF518 and BF533 are technical grade chip, two cpu chips embed in technical grade design circuit, R11 in temperature collect module, R12, R13 and PT100 form sensor measurement electric bridge, and electric bridge input is by TL431 voltage stabilizing; Adjust arm resistance R13, change the differential voltage signal size that is input to amplifier, for zeroing; Electric bridge output has designed two-stage amplifying circuit, and integrated operational amplifier adopts LM358; In energy supply control module, input voltage V
infirst through EMI filter circuit filtering EMI, disturb and to exchanging input rectifying, obtain stable DC input voitage V
dc, RCD clamp circuit is positioned at transformer primary, is used for suppressing the spike that leakage inductance energy excites; The output of energy supply control module circuit connects close loop negative feedback, output voltage V
outthrough dividing potential drop, obtain feedback voltage V
fb, V
fbsampled voltage V with temperature collection circuit output
o1through difference amplifier EA output modulation voltage V
c, V
cafter optocoupler, through PWM pulse width modulator (LD7575), control metal-oxide-semiconductor (Q
1) ON time t
onthereby, control output voltage V
out.
Good effect of the present invention is cannot normally start and cause distribution network to occur after power-off at extremely frigid zones equipment backup power systems such as the north for distribution power automation terminal, back-up source is unable to supply situation, its storage battery adopts newborn body silicon energy storage device, with newborn body electrolyte, replace sulfuric acid electrolyte, electrolyte has adopted novel complex silicon salt, make the cryogenic property of battery obtain very big improvement, thereby guarantee that storage battery is when-40 ° of C, capacity still can remain on more than 80%, at-40 ° of C, to the outdoor environment of+60 ° of C degree, work simultaneously, be not less than 5 years useful life, this back-up source is mainly used in electrical power distribution automatization system.
Accompanying drawing explanation
Fig. 1 is can be at the distribution power automation terminal core cell power unit design principle figure of-40 ° of direct cold start-ups of C.
Fig. 2 is can be at the distribution power automation terminal core cell CPU of-40 ° of direct cold start-ups of C partial design schematic diagram.
Fig. 3 is can be at the distribution power automation terminal core cell fundamental diagram of-40 ° of direct cold start-ups of C.
Fig. 4 be can be under-40 ° of C environment direct applied Intelligent power distribution terminal backup power system
Energy supply control module part pinouts.
Fig. 5 be can be under-40 ° of C environment direct applied Intelligent power distribution terminal backup power system
Fundamental diagram.
Fig. 6 be can be under-40 ° of C environment direct applied Intelligent power distribution terminal backup power system
A storage battery-40 ° C discharge and recharge experimental curve diagram.
Fig. 7 possesses the fundamental diagram of the Intelligent power distribution terminal system of back-up source under ° C environment of-50 ° of C ~ 70.
In Fig. 8, be the intelligent power distribution automatization terminal Simple line figure that possesses back-up source.
In Fig. 9, be temperature collect module and energy supply control module circuit diagram.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described: the distribution power automation terminal that possesses backup power system under a kind of low temperature environment, by temperature collect module and energy supply control module, formed, it is characterized in that: energy supply control module is that its power supply of Effective Anti low temp. electric source module turns 5V/DC device CPU power supply.Distribution power automation terminal core cell adopts two CPU designs, and two cpu chip BF518 and BF533 are technical grade chip, and two cpu chips embed in technical grade design circuits.R11 in temperature collect module, R12, R13 and PT100 form sensor measurement electric bridge, and electric bridge input is by TL431 voltage stabilizing; Adjust arm resistance R13, change the differential voltage signal size that is input to amplifier, for zeroing; Electric bridge output has designed two-stage amplifying circuit, and integrated operational amplifier adopts LM358; In energy supply control module, input voltage V
infirst through EMI filter circuit filtering EMI, disturb and to exchanging input rectifying, obtain stable DC input voitage V
dc.RCD clamp circuit is positioned at transformer primary, is used for suppressing the spike that leakage inductance energy excites.LD7575 is logical good scientific and technological PWM generation and control chip, the constant-duty cycle (T=t of holding circuit switch element
on+ t
off); The output of energy supply control module circuit connects close loop negative feedback, output voltage V
outthrough dividing potential drop, obtain feedback voltage V
fb, V
fbsampled voltage V with temperature collection circuit output
o1through difference amplifier EA output modulation voltage V
c, V
cafter optocoupler, through PWM pulse width modulator (LD7575), control metal-oxide-semiconductor (Q
1) ON time t
onthereby, control output voltage V
out.
The present invention adopts full technical grade design, by choosing technical grade components and parts, anti-cryogenic circuit designs, and embed technical grade Effective Anti low temp. electric source module and cpu chip, thereby make the novel distribution terminal core cell power unit can be at low temperature environment normal power supply, and CPU board can normally start work at low temperature environment.The present invention partly adopts Novel breast body silicon energy storage device at storage battery, with the complex silicon salt of brand-new mechanism, does electrolyte, with the newborn body electrolyte sulfuric acid electrolyte that replaced, thereby makes the novel distribution terminal backup power system can be at low temperature environment normal power supply.
As shown in Figure 1, PDZ800 Series Intelligent distribution terminal core cell power unit is chosen modular power transmitter, utilizes modular Effective Anti low temperature ability fundamentally to solve conventional power source circuit elements device in the impaired difficult problem that cannot normally work of low temperature environment performance.By Fig. 2-3, can find out that Intelligent power distribution terminal core cell adopts two cpu models, CPU information gathering and processing thereof, another CPU is responsible for communications, two CPU all choose the technical grade chip that anti-low temperature ability is strong, the anti-low temp. electric source module that coordinates power unit, has well solved normally starting problem of low temperature environment tradition core cell.
From Fig. 4-5, can find out that energy supply control module comprises that two-way exchanges the interface that discharges and recharges of input and the output of two-way direct current and storage battery, technical grade chip has guaranteed that module also can normally start under the low temperature environment of-40 ° of C.When exchanging input when normal, module can not only input dc power, can also charge to storage battery, keeps the electric weight of storage battery sufficient; When exchanging dead electricity, module automatic seamless is switched to storage battery power supply pattern, and direct current input remains stable.In module, also have in addition the node of cell activation, can to storage battery, activate at any time, thereby make storage battery still can keep good working state under cryogenic conditions.The storage battery of backup power system adopts Novel breast body silicon energy storage device as can be seen from Figure 6, and cryogenic property is good, and under the condition of-40 ° of C, charging and discharging currents still can remain normal stable.
As shown in Figure 7, back-up source and Intelligent power distribution terminal are designed for uniformity, can adapt to the low temperature environment job requirement under ° C environment of-50 ° of C ~ 70.When carrying out Alternating Current Power Supply, alternating current, through inverter power circuit, on the one hand, changes into DC supply and powers to distribution terminal, also can charge to backup power system on the other hand.When stopping Alternating Current Power Supply, back-up source changes into DC supply through inverter circuit and powers to distribution terminal.
In Fig. 8, be the intelligent power distribution automatization terminal Simple line figure that possesses back-up source.Energy supply control module can be operated under low temperature environment.When alternating current is powered, through energy supply control module, can charge to back-up source, can also provide working power to device simultaneously.In the time of alternating current power-off, energy supply control module can switch power supply automatically, makes backup power system enter power supply state.Realized the protection of installation's power source.In temperature during lower than-40 ° of C, it is too low that the transducer of temperature compensator detects temperature, trigger immediately super capacitor power supply, start-up temperature compensation program, to installing residing casing environment, heat, until temperature during higher than-40 ° of C, is recovered energy supply control module power supply, the super capacitor in temperature compensator is charged simultaneously.
Fig. 9 is temperature collect module and energy supply control module circuit diagram.Circuit is comprised of two modules, temperature collect module and energy supply control module.As Fig. 9, the R11 in temperature collect module, R12, R13 and PT100 form sensor measurement electric bridge, and electric bridge input is by TL431 voltage stabilizing.Adjust arm resistance R13, can change the differential voltage signal size that is input to amplifier, be generally used for zeroing.For preventing the too high nonlinearity erron that causes of single-stage multiplication factor, electric bridge output has designed two-stage amplifying circuit (integrated operational amplifier can adopt LM358 etc.).When temperature declines, PT100 resistance diminishes, and the differential signal that is input to amplifying circuit diminishes, the corresponding reduction of output voltage V o1 of amplifying circuit.In energy supply control module, input voltage V
infirst through EMI filter circuit filtering EMI, disturb and to exchanging input rectifying, obtain stable DC input voitage V
dc.RCD clamp circuit is positioned at transformer primary, is used for suppressing the spike that leakage inductance energy excites.LD7575 is for logical good scientific and technological PWM generation and control chip, by design, the constant-duty cycle (T=t of holding circuit switch element
on+ t
off).Modular circuit output connects close loop negative feedback, output voltage V
outthrough dividing potential drop, obtain feedback voltage V
fb, V
fbsampled voltage V with temperature collection circuit output
o1through difference amplifier EA output modulation voltage V
c, V
cafter optocoupler, through PWM pulse width modulator (LD7575), control metal-oxide-semiconductor (Q
1) ON time t
onthereby, control output voltage V
out.
The present invention proposes the method for the distribution power automation terminal with backup power system of anti-low temperature ability, catered to as to improve power distribution automation in the demand of cold area in north work on the spot adverse circumstances.Mode by power module solves conventional power source cannot be in a difficult problem for extremely frigid zones normal power supply.In addition, choose the strong cpu chip of anti-low temperature ability, successfully solve the problem that low temperature environment distribution terminal core cell main program cannot normally start.Choose energy supply control module and the good newborn body silicon energy storage device of cryogenic property that anti-low temperature ability is strong, successfully solve the problem that low temperature environment distribution terminal backup power system cannot normally start.The two is carried out to whole design, and be equipped with temperature compensation function, make the whole system can be the environmental work of low temperature more, adaptability be stronger.Band back-up source and cryophylactic distribution power automation terminal are brand-new changes, also make distribution terminal towards the future development of intellectuality, modernization, high efficiency, hommization simultaneously.
Claims (1)
1. the distribution power automation terminal that possesses backup power system under low temperature environment, is comprised of temperature collect module and energy supply control module, it is characterized in that: energy supply control module is that its power supply of Effective Anti low temp. electric source module turns 5V/DC device CPU power supply; Distribution power automation terminal core cell adopts two CPU designs, two cpu chip BF518 and BF533 are technical grade chip, two cpu chips embed in technical grade design circuit, R11 in temperature collect module, R12, R13 and PT100 form sensor measurement electric bridge, and electric bridge input is by TL431 voltage stabilizing; Adjust arm resistance R13, change the differential voltage signal size that is input to amplifier, for zeroing; Electric bridge output has designed two-stage amplifying circuit, and integrated operational amplifier adopts LM358; In energy supply control module, input voltage V
infirst through EMI filter circuit filtering EMI, disturb and to exchanging input rectifying, obtain stable DC input voitage V
dc, RCD clamp circuit is positioned at transformer primary, is used for suppressing the spike that leakage inductance energy excites; The output of energy supply control module circuit connects close loop negative feedback, output voltage V
outthrough dividing potential drop, obtain feedback voltage V
fb, V
fbsampled voltage V with temperature collection circuit output
o1through difference amplifier EA output modulation voltage V
c, V
cafter optocoupler, through PWM pulse width modulator LD7575, control metal-oxide-semiconductor Q
1oN time t
onthereby, control output voltage V
out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410408046.7A CN104201773A (en) | 2014-08-19 | 2014-08-19 | Distribution automation terminal provided with standby power source system and used under low temperature environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410408046.7A CN104201773A (en) | 2014-08-19 | 2014-08-19 | Distribution automation terminal provided with standby power source system and used under low temperature environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104201773A true CN104201773A (en) | 2014-12-10 |
Family
ID=52087026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410408046.7A Pending CN104201773A (en) | 2014-08-19 | 2014-08-19 | Distribution automation terminal provided with standby power source system and used under low temperature environment |
Country Status (1)
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|---|---|
| CN (1) | CN104201773A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106368600A (en) * | 2016-09-06 | 2017-02-01 | 深圳市玖品空气净化科技有限公司 | Intelligent rock drilling device used for petroleum exploration |
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| CN201352719Y (en) * | 2008-12-31 | 2009-11-25 | 佛山市顺德区瑞德电子实业有限公司 | Electric vehicle charger with automatic temperature compensation function |
| CN103389753A (en) * | 2012-05-11 | 2013-11-13 | 四川优的科技有限公司 | Water temperature monitoring system with water temperature signal amplification function |
| CN103986235A (en) * | 2014-05-23 | 2014-08-13 | 国电南瑞科技股份有限公司 | Table zone state monitoring intelligent terminal based on Bluetooth communication |
| CN204089343U (en) * | 2014-08-19 | 2015-01-07 | 国家电网公司 | The distribution power automation terminal possessing backup power system under low temperature environment |
-
2014
- 2014-08-19 CN CN201410408046.7A patent/CN104201773A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201352719Y (en) * | 2008-12-31 | 2009-11-25 | 佛山市顺德区瑞德电子实业有限公司 | Electric vehicle charger with automatic temperature compensation function |
| CN103389753A (en) * | 2012-05-11 | 2013-11-13 | 四川优的科技有限公司 | Water temperature monitoring system with water temperature signal amplification function |
| CN103986235A (en) * | 2014-05-23 | 2014-08-13 | 国电南瑞科技股份有限公司 | Table zone state monitoring intelligent terminal based on Bluetooth communication |
| CN204089343U (en) * | 2014-08-19 | 2015-01-07 | 国家电网公司 | The distribution power automation terminal possessing backup power system under low temperature environment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106368600A (en) * | 2016-09-06 | 2017-02-01 | 深圳市玖品空气净化科技有限公司 | Intelligent rock drilling device used for petroleum exploration |
| CN106368600B (en) * | 2016-09-06 | 2018-10-09 | 东营市洁东石油技术开发有限公司 | A kind of intelligent rock drilling device for oil exploration |
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Application publication date: 20141210 |