CN107015050A - Voltage detecting circuit and voltage tester - Google Patents
Voltage detecting circuit and voltage tester Download PDFInfo
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- CN107015050A CN107015050A CN201710341816.4A CN201710341816A CN107015050A CN 107015050 A CN107015050 A CN 107015050A CN 201710341816 A CN201710341816 A CN 201710341816A CN 107015050 A CN107015050 A CN 107015050A
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- voltage
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- electric capacity
- detecting circuit
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/06—Measuring real component; Measuring reactive component
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention provides a kind of voltage detecting circuit and voltage tester, is related to universal meter field, including：Gear shift voltage changing module, rectification module and display module；Wherein, the first input end ground connection of gear shift voltage changing module, the connection load of the second input；A voltmeter is connected between first input end and the second input；The output end of gear shift voltage changing module connects the input of rectification module；The output end connection display module of rectification module；When voltmeter has a registration, and display module, when being shown, the voltage is active voltage；When voltmeter has a registration, and display module without display when, the voltage is reactive voltage.Can be that active voltage or reactive voltage are identified to electrical leakage voltage, accurately to remind whether maintenance personal needs that electrical equipment is placed under repair or disabled by the voltage detecting circuit and voltage tester.
Description
Technical field
The present invention relates to universal meter field, more particularly, to a kind of voltage detecting circuit and voltage tester.
Background technology
During being overhauled to power transmission sequence or electrical equipment, when occur Leaked Current of Line to Ground when, electric leakage circuit with
Ground formation loop, while there is voltage generation, has electric current to flow through.This voltage can drive electrical equipment to work, with using power supply
Voltage phase difference is very few, and usual this voltage is referred to as：Active voltage.It can just be measured using voltmeter or universal meter.
But not all voltage measured by voltmeter or universal meter, electrical equipment can be driven to do work, make electricity
Gas equipment works, that is to say, that the voltage measured by voltmeter or universal meter may without carrying load ability, generally by it is this not
The voltage that can be done work is referred to as reactive voltage, and this voltage will not drive loaded work piece, and more people will not be damaged.It is existing at present
Technology can not be that active voltage or reactive voltage are identified to electrical leakage voltage, maintenance personal can usually be carried out unnecessary
Maintenance, cause the waste of human and material resources resource.
The content of the invention
In view of this, can be to leakage it is an object of the invention to provide a kind of voltage detecting circuit and voltage tester
Piezoelectric voltage is that active voltage or reactive voltage are identified, accurately to remind whether maintenance personal needs to carry out electrical equipment
Repair or disable.
In a first aspect, the embodiments of the invention provide a kind of voltage detecting circuit, including：Gear shift voltage changing module, rectification mould
Block and display module；
The first input end ground connection of gear shift voltage changing module, the connection load of the second input；
A voltmeter is connected between first input end and the second input；
The output end of gear shift voltage changing module connects the input of rectification module；
The output end connection display module of rectification module；
When voltmeter has a registration, and display module, when being shown, the voltage is active voltage；
When voltmeter has a registration, and display module without display when, the voltage is reactive voltage.
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of the first of first aspect, wherein, change
Shelves voltage changing module includes：Transformer and many GSS Gear Select Switch；
Transformer includes：Primary coil, iron core and secondary coil；
The first port of primary coil, is used as the second input of gear shift voltage changing module；
Multiple ports are drawn at the different numbers of turn of primary coil, to constitute multiple different voltage gears；
Multiple ports are connected with the folding end of many GSS Gear Select Switch；
The other end of many GSS Gear Select Switch, is used as the first input end of gear shift voltage changing module；
Voltage gear includes：2V grades, 127V grades, 220V grades, 380V grades, 660V grades, 1140V grades, 1250V grades.
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of second of first aspect, wherein, it is whole
Flow module includes：Bridge rectifier；
Bridge rectifier includes：Diode D1, diode D2, diode D3, diode D4；
Diode D1 anode is connected with the first port of secondary coil and diode D2 negative electrode respectively；
Diode D1 negative electrode is connected as the first output end of rectification module with diode D4 negative electrode；
Diode D4 anode is connected with the second port of secondary coil and diode D3 negative electrode respectively；
Diode D3 anode is connected as the second output end of rectification module with diode D2 anode.
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of the third of first aspect, wherein, bridge
Formula rectifier is also associated with filtration module；
Filtration module is connected with display module.
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of the 4th of first aspect kind, wherein, filter
Ripple module includes：Electric capacity C1, electric capacity C2, electric capacity C3 and resistance R1；
Electric capacity C1 two ends connect the first output end and the second output end of rectification module respectively；
Electric capacity C2, resistance R1 one end connect electric capacity C1 one end respectively；
Electric capacity C2, the resistance R1 other end connect electric capacity C3 one end respectively；
The electric capacity C3 other end connection electric capacity C1 other end.
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of the 5th of first aspect kind, wherein, show
Show that module includes：Light emitting diode；
Light emitting diode is in parallel with electric capacity C3.
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of the 6th of first aspect kind, wherein, hair
The quantity of optical diode is two.
Second aspect, the embodiment of the present invention also provides a kind of voltage tester, including：Tester body, gear regulation are opened
Pass, digital display screen, p-wire；
Voltage detecting circuit as described in relation to the first aspect is installed in tester body；
Gears regulating switch, digital display screen and p-wire are arranged on tester body；
Digital display screen is shown for the registration of voltmeter in voltage detecting circuit and the brightness of light emitting diode is shown；
P-wire is provided with test pen.
With reference to second aspect, the embodiments of the invention provide the possible embodiment of the first of second aspect, wherein, also
Including：Test wire winding device；
Test wire winding device is fixedly installed in tester body, and is connected with p-wire.
With reference to second aspect, the embodiments of the invention provide the possible embodiment of second of second aspect, wherein, also
Including：Neck；
Neck is arranged on tester body, for fixing test pen.
Technical scheme provided in an embodiment of the present invention brings following beneficial effect：A kind of electricity provided in an embodiment of the present invention
In pressure detection circuit, including：Gear shift voltage changing module, rectification module and display module, wherein, the first of gear shift voltage changing module is defeated
Enter end ground connection, the connection load of the second input；A voltmeter, gear shift transformation are also connected between first input end and the second input
The output end of module connects the input of rectification module；The output end connection display module of rectification module.
The voltage detecting circuit provided using the embodiment of the present invention, when the second input connection of gear shift voltage changing module is negative
During load, voltmeter detects voltage, and has registration to show, meanwhile, display module is shown, at this point it is possible to judge the electricity
Press as active voltage；When voltmeter has a registration, and display module without display when, then the voltage is reactive voltage.By this
Voltage detecting circuit, can be that active voltage or reactive voltage are identified to electrical leakage voltage, accurately to remind maintenance personal
Whether need that electrical equipment is placed under repair or disabled.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The accompanying drawing used required in embodiment or description of the prior art is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of structured flowchart for voltage detecting circuit that the embodiment of the present invention one is provided；
Fig. 2 is a kind of circuit diagram for voltage detecting circuit that the embodiment of the present invention two is provided；
The circuit diagram of filtration module in a kind of voltage detecting circuit that Fig. 3 provides for the embodiment of the present invention two；
Fig. 4 is a kind of schematic diagram for voltage tester that the embodiment of the present invention three is provided.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with accompanying drawing to the present invention
Technical scheme be clearly and completely described, it is clear that described embodiment is a part of embodiment of the invention, rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belongs to the scope of protection of the invention.
After being detected by existing voltmeter or universal meter to electrical leakage voltage, it is impossible to which it is to have to judge the voltage
Work(voltage or reactive voltage, can frequently result in maintenance personal and are repaired for reactive voltage, cause unnecessary manpower, thing
The power wasting of resources., can be to electric leakage the embodiments of the invention provide a kind of voltage detecting circuit and voltage tester based on this
Voltage is that active voltage or reactive voltage are identified, accurately to remind whether maintenance personal needs to repair electrical equipment
Reason is disabled.
Embodiment one：
The embodiment of the present invention provides a kind of voltage detecting circuit, and shown in Figure 1, the voltage detecting circuit includes：Gear shift
Voltage changing module 11, rectification module 12 and display module 13.
Wherein, the first input end ground connection of gear shift voltage changing module 11, the connection load of the second input；First input end and
A voltmeter is connected between two inputs；The output end of gear shift voltage changing module 11 connects the input of rectification module 12；Rectification mould
The output end connection display module 13 of block 12；When voltmeter has a registration, and display module 13, when being shown, the voltage is active
Voltage；When voltmeter has a registration, and display module without display when, the voltage is reactive voltage.
When implementing, gear shift voltage changing module 11 can be detected to the electrical leakage voltage of various different loads,
By the voltage detected by its output end, transmit to rectification module 12, by its output end, voltage is passed again for rectification module 12
Display module 13 is delivered to, when display module 13 is not shown, and voltmeter is when having registration, it is possible to determine that the voltage now detected
For reactive voltage.The detection gear of electrical leakage voltage has multiple, is specially：2V grades, 127V grades, 220V grades, 380V grades, 660V grades,
1140V grades, 1250V grades, the electrical equipment or power transmission sequence of a variety of different voltages can so be detected.
The voltage generally detected using voltmeter or universal meter, it may be possible to the voltage that can be done work to external world, that is, had
Work(voltage, it is also possible to the voltage without carrying load ability, i.e. reactive voltage, therefore, is detected using voltmeter or universal meter,
It is active voltage or reactive voltage that the voltage, which can not be judged, and then can not know and the voltage should be taken measures or not, is carried out
Maintenance of equipment or deactivation.
The voltage detecting circuit provided using the embodiment of the present invention, when the second input of gear shift voltage changing module 11 is connected
During load, voltmeter detects voltage, and has registration to show, meanwhile, display module 13 is shown, at this point it is possible to judge
The voltage is active voltage；When voltmeter has a registration, and display module without display when, then the voltage is reactive voltage.It is logical
The voltage detecting circuit is crossed, can be that active voltage or reactive voltage are identified to electrical leakage voltage, is repaired with accurate remind
Whether personnel need that electrical equipment is placed under repair or disabled.
Embodiment two：
The embodiment of the present invention provides a kind of voltage detecting circuit, as a kind of preferred embodiment, as shown in Fig. 2 gear shift becomes
The first input end B ground connection of die block 21, the second input A connections load；Connect between first input end B and the second input A
Connect a voltmeter；The output end of gear shift voltage changing module 21 connects the input of rectification module 22；The output end of rectification module 22 connects
Connect display module 23；In the voltage detecting circuit, gear shift voltage changing module 21 includes：Transformer and many GSS Gear Select Switch.
Wherein, transformer includes：Primary coil, iron core and secondary coil.The first port of primary coil, is used as gear shift
Second input of voltage changing module；Multiple ports are drawn at the different numbers of turn of primary coil, to constitute multiple different voltages
Gear；Multiple ports are connected with the folding end of many GSS Gear Select Switch；The other end of many GSS Gear Select Switch, is used as gear shift transformation
The first input end of module.Voltage gear includes：2V grades, 127V grades, 220V grades, 380V grades, 660V grades, 1140V grades, 1250V
Shelves.
In addition, the second input of gear shift voltage changing module 21 is also connected with a master switch K, the work for controlling whole circuit
Make with stopping, for the sake of security, switch K is also associated with a fuse, and the other end of fuse connects the primary of transformer
The first port of coil.
Transformer (Transformer) is the device for changing alternating voltage using the principle of electromagnetic induction, main member
It is primary coil, secondary coil and iron core (magnetic core).Major function has：Voltage transformation, current transformation, impedance are converted, isolated, surely
Press (magnetic saturation transformer) etc..It can be divided into, according to use,：Distribution transformer, full-sealed transformer, combined transformer, dry type become
Depressor, oil-filled transformer, single-phase transformer, furnace transformer, rectifier transformer etc..Transformer in the embodiment of the present invention with
Rectification module is connected, and realizes the effect of rectifier transformer.
Rectification module 22 includes：Bridge rectifier.
Specifically, bridge rectifier includes：Diode D1, diode D2, diode D3, diode D4；Wherein, diode
D1 anode is connected with the first port of secondary coil and diode D2 negative electrode respectively；Diode D1 negative electrode is used as rectification
First output end of module, is connected with diode D4 negative electrode；The second port of diode D4 anode respectively with secondary coil
And diode D3 negative electrode connection；Diode D3 anode is as the second output end of rectification module, the sun with diode D2
Pole is connected.
Within each work period of rectifier bridge, the same time, only two diodes were operated, and passed through diode
One-way conduction function, strong alternating current is converted into unidirectional DC pulse voltage, with the rectification effect realized.
In addition, in order that rectifying and wave-filtering effect is best, as a kind of preferred embodiment, bridge rectifier is also associated with filtering
Module 24, the filtration module 24 is connected with display module 23.
Specifically, filtration module 24 includes：Electric capacity C1, electric capacity C2, electric capacity C3 and resistance R1.
Electric capacity C1 two ends connect the first output end and the second output end of rectification module respectively；Electric capacity C2, resistance R1
One end connect electric capacity C1 one end respectively；Electric capacity C2, the resistance R1 other end connect electric capacity C3 one end respectively；Electric capacity C3's
The other end connection electric capacity C1 other end.
Certainly, filtration module 24 can also be other filter circuits, such as, shown in Figure 3, the filter circuit bag
Include：Electric capacity vC1, mu balanced circuit vU1 and electric capacity vC2.
Wherein, electric capacity vC1 and electric capacity vC2 be connected between mu balanced circuit vU1 grounding ports and input port with
And between grounding ports and output port；Mu balanced circuit vU1 output port is also connected with the output end of rectification module, passes through the filter
Wave circuit can equally realize filter effect.
Display module 23 includes：Light emitting diode, the light emitting diode is in parallel with electric capacity C3.
The quantity of light emitting diode, can be two, or multiple, in parallel with electric capacity C3, in present invention implementation
In example, display module 23 includes：Light emitting diode D5, light emitting diode D6.
It should be noted that display module 23 can also be other display circuits, as long as can be detected for judgement
To voltage whether can do work.
The voltage detecting circuit provided by the embodiment of the present invention, when the second input of gear shift voltage changing module 21 is connected
During load, voltmeter detects voltage, and has registration to show, meanwhile, the lumination of light emitting diode in display module 23, this
When, it can be determined that the voltage is active voltage；When voltmeter has the light emitting diode in registration, and display module 23 not light
When, then the voltage is reactive voltage.Can be active voltage or reactive voltage to electrical leakage voltage by the voltage detecting circuit
It is identified, accurately to remind whether maintenance personal needs that electrical equipment is placed under repair or disabled.
Embodiment three：
The embodiment of the present invention also provides a kind of voltage tester, shown in Figure 4, and the voltage tester includes：Tester
Body 41, gears regulating switch 43, digital display screen 42, p-wire 44.
Wherein, the voltage detecting circuit as described in above-mentioned any embodiment is installed in tester body 41；Gear is adjusted
Switch 43, digital display screen 42 and p-wire 44 are arranged on tester body 41；Digital display screen 42 is examined for voltage
The registration of voltmeter is shown in slowdown monitoring circuit and the brightness of light emitting diode is shown；P-wire 44 is provided with test pen 45.
In addition, also including：Test wire winding device 47.
Test wire winding device 47 is fixedly installed in tester body 41, and is connected with p-wire 44.
The voltage tester that the embodiment of the present invention is provided also includes：Neck 46；
Neck 46 is arranged on tester body 41, for fixing test pen 45.
The voltage tester can directly be controlled the work or stopping of the tester or be changed by gears regulating switch 43
Shelves, can also set a master switch, to realize the work or stopping of the tester on tester body 41 again.
During using the voltage tester, user need to only remove test pen 45, and the p-wire 44 that pulls outward so that test
The length of line 44 meets the length of user's needs test.The voltage tester that the embodiment of the present invention is provided, it is simple in construction, make
With convenient, measure accurate, convenient reading, cost is low, applied widely, and service life is long, with safe and reliable effect.
In a kind of voltage tester provided in an embodiment of the present invention, when 45 1 ground connection of test pen, when another connects load,
There is registration to show on digital display screen 42, while can light, at this point it is possible to judge the voltage for active voltage；Work as numeral
Display screen 42 has registration, but when not lighting, then the voltage is reactive voltage., can be to electric leakage by the voltage tester
Voltage is that active voltage or reactive voltage are identified, accurately to remind whether maintenance personal needs to repair electrical equipment
Reason is disabled.
Voltage tester provided in an embodiment of the present invention, has identical with the voltage detecting circuit that above-described embodiment is provided
Technical characteristic, so can also solve identical technical problem, reach identical technique effect.
If the function is realized using in the form of SFU software functional unit and is used as independent production marketing or in use, can be with
It is stored in a computer read/write memory medium.Understood based on such, technical scheme is substantially in other words
The part contributed to prior art or the part of the technical scheme can be embodied in the form of software product, the meter
Calculation machine software product is stored in a storage medium, including some instructions are to cause a computer equipment (can be individual
People's computer, processor, or network equipment etc.) perform all or part of step of each of the invention embodiment method.And it is preceding
The storage medium stated includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only Memory), random access memory
(RAM, Random Access Memory), magnetic disc or CD etc. are various can be with the medium of store program codes.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to
Be easy to the description present invention and simplify description, rather than indicate or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicating or implying relative importance.
Finally it should be noted that：Above example, is only the embodiment of the present invention, the skill to illustrate the present invention
Art scheme, rather than its limitations, protection scope of the present invention is not limited thereto, although entering with reference to the foregoing embodiments to the present invention
Go detailed description, it will be understood by those within the art that：Any one skilled in the art is at this
Invent in the technical scope disclosed, it still can modify to the technical scheme described in previous embodiment or can think easily
Equivalent substitution is carried out to change, or to which part technical characteristic；And these modifications, change or replacement, do not make corresponding
The essence of technical scheme departs from the spirit and scope of technical scheme of the embodiment of the present invention, should all cover in protection scope of the present invention
Within.Therefore, protection scope of the present invention should be defined by scope of the claims.
Claims (10)
1. a kind of voltage detecting circuit, it is characterised in that including：Gear shift voltage changing module, rectification module and display module；
The first input end ground connection of the gear shift voltage changing module, the connection load of the second input；
A voltmeter is connected between the first input end and second input；
The output end of the gear shift voltage changing module connects the input of the rectification module；
The output end connection display module of the rectification module；
When the voltmeter has a registration, and the display module, when being shown, the voltage is active voltage；
When the voltmeter has a registration, and the display module without display when, the voltage is reactive voltage.
2. voltage detecting circuit according to claim 1, it is characterised in that the gear shift voltage changing module includes：Transformer
And many GSS Gear Select Switch；
The transformer includes：Primary coil, iron core and secondary coil；
The first port of the primary coil, is used as the second input of the gear shift voltage changing module；
Multiple ports are drawn at the different numbers of turn of the primary coil, to constitute multiple different voltage gears；
The multiple port is connected with the folding end of many GSS Gear Select Switch；
The other end of many GSS Gear Select Switch, is used as the first input end of the gear shift voltage changing module；
The voltage gear includes：2V grades, 127V grades, 220V grades, 380V grades, 660V grades, 1140V grades, 1250V grades.
3. voltage detecting circuit according to claim 2, it is characterised in that the rectification module includes：Bridge rectifier；
The bridge rectifier includes：Diode D1, diode D2, diode D3, diode D4；
The anode of the diode D1 is connected with the first port of the secondary coil and the negative electrode of the diode D2 respectively；
The negative electrode of the diode D1 is connected as the first output end of the rectification module with the negative electrode of the diode D4；
The anode of the diode D4 is connected with the second port of the secondary coil and the negative electrode of the diode D3 respectively；
The anode of the diode D3 is connected as the second output end of the rectification module with the anode of the diode D2.
4. voltage detecting circuit according to claim 3, it is characterised in that the bridge rectifier is also associated with filtering mould
Block；
The filtration module is connected with the display module.
5. voltage detecting circuit according to claim 4, it is characterised in that the filtration module includes：Electric capacity C1, electric capacity
C2, electric capacity C3 and resistance R1；
The two ends of the electric capacity C1 connect the first output end and the second output end of the rectification module respectively；
The electric capacity C2, one end of the resistance R1 connect one end of the electric capacity C1 respectively；
The electric capacity C2, the other end of the resistance R1 connect one end of the electric capacity C3 respectively；
The other end of the electric capacity C3 connects the other end of the electric capacity C1.
6. voltage detecting circuit according to claim 5, it is characterised in that the display module includes：Light emitting diode；
The light emitting diode is in parallel with the electric capacity C3.
7. voltage detecting circuit according to claim 6, it is characterised in that the quantity of the light emitting diode is two.
8. a kind of voltage tester, it is characterised in that including：Tester body, gears regulating switch, digital display screen, test
Line；
Voltage detecting circuit as described in claim 1-7 is installed in the tester body；
The gears regulating switch, the digital display screen and the p-wire are arranged on the tester body；
The digital display screen be used for the voltage detecting circuit in voltmeter registration show and light emitting diode brightness
Display；
The p-wire is provided with test pen.
9. voltage tester according to claim 8, it is characterised in that also include：Test wire winding device；
The test wire winding device is fixedly installed in the tester body, and is connected with the p-wire.
10. voltage tester according to claim 9, it is characterised in that also include：Neck；
The neck is arranged on the tester body, for fixing the test pen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710341816.4A CN107015050A (en) | 2017-05-15 | 2017-05-15 | Voltage detecting circuit and voltage tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710341816.4A CN107015050A (en) | 2017-05-15 | 2017-05-15 | Voltage detecting circuit and voltage tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107015050A true CN107015050A (en) | 2017-08-04 |
Family
ID=59450118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710341816.4A Pending CN107015050A (en) | 2017-05-15 | 2017-05-15 | Voltage detecting circuit and voltage tester |
Country Status (1)
| Country | Link |
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| CN (1) | CN107015050A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280597A (en) * | 2013-07-12 | 2015-01-14 | 海洋王（东莞）照明科技有限公司 | Voltage detecting system and detecting device |
| CN104914293A (en) * | 2015-05-08 | 2015-09-16 | 深圳市盈科互动科技有限公司 | Power failure detection circuit and power failure detection device |
| CN207067232U (en) * | 2017-05-15 | 2018-03-02 | 中领世能（天津）科技有限公司 | Voltage detecting circuit and voltage tester |
-
2017
- 2017-05-15 CN CN201710341816.4A patent/CN107015050A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280597A (en) * | 2013-07-12 | 2015-01-14 | 海洋王（东莞）照明科技有限公司 | Voltage detecting system and detecting device |
| CN104914293A (en) * | 2015-05-08 | 2015-09-16 | 深圳市盈科互动科技有限公司 | Power failure detection circuit and power failure detection device |
| CN207067232U (en) * | 2017-05-15 | 2018-03-02 | 中领世能（天津）科技有限公司 | Voltage detecting circuit and voltage tester |
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