CN110492446A - A kind of electric energy meter liquid-crystal apparatus fault detection method and system - Google Patents
A kind of electric energy meter liquid-crystal apparatus fault detection method and system Download PDFInfo
- Publication number
- CN110492446A CN110492446A CN201711132970.7A CN201711132970A CN110492446A CN 110492446 A CN110492446 A CN 110492446A CN 201711132970 A CN201711132970 A CN 201711132970A CN 110492446 A CN110492446 A CN 110492446A
- Authority
- CN
- China
- Prior art keywords
- sequence current
- main control
- zero
- control chip
- machine box
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
- H02H3/046—Signalling the blowing of a fuse
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/263—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of measured values
-
- 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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Landscapes
- Measurement Of Current Or Voltage (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a kind of electric energy meter liquid-crystal apparatus fault detection method and systems; including fitting machine box; the outer surface of fitting machine box is inlaid with liquid crystal display and function selection key; integrated circuit board is installed inside fitting machine box; main control chip is welded on integrated circuit board; the data input pin of main control chip is connected with zero-sequence current detection module, and order output terminal is connected with breaker protector and sound and light alarm module；Zero-sequence current detection module includes external probe, external probe input terminal is connected with crocodile clip, crocodile clip clamping connection is in circuit under test, the output end of external probe is connected with zero sequence current mutual inductor, the output end of zero sequence current mutual inductor is connected with linear operational amplifier, and linear operational amplifier is also connected with voltage comparator and analog to digital conversion circuit.The present invention can effectively detect leaky, and sound an alarm while realizing circuit protection in time, reduce safety accident odds.
Description
Technical field
The present invention relates to electric wiring security technology area, specially a kind of electric energy meter liquid-crystal apparatus fault detection method and
System.
Background technique
High-voltage fence people are not easy to contact, and low voltage electric network covering surface is big, and electrical equipment is more, and the chance that people touches also compares
It is more, since electric wiring makes moist, the overload power utilization of peak times of power consumption, service conductor, lead-out wire insulation ag(e)ing or breakage, rubber
Insulated wire sheath, flexible cable sheath and insulating layer rupture, flexible cable splice insulation binder select it is improper or loosely fall off etc. because
Element can all cause the electric leakage accident of low-voltage supply line to occur, to cause the disasters such as electric shock, fire.
Summary of the invention
In view of the above problems, the present invention provides a kind of electric energy meter liquid-crystal apparatus fault detection method and system, Ke Yiyou
Effect detection leaky, and circuit protection is sounded an alarm while realized in time, reduce safety accident odds, it can be effective
Solve the problems in background technique.
To achieve the above object, the invention provides the following technical scheme: a kind of electric energy meter liquid-crystal apparatus fault detection method
And system, including fitting machine box, the outer surface of the fitting machine box be inlaid with liquid crystal display and function selection key, fitting machine
Integrated circuit board is installed inside box, main control chip, the data input of the main control chip are welded on the integrated circuit board
End is connected with zero-sequence current detection module, and order output terminal is connected with breaker protector and sound and light alarm module；The zero sequence electricity
Flowing detection module includes external probe, and the external probe is pierced by from the side of fitting machine box, and input terminal is connected with crocodile clip, institute
Crocodile clip clamping connection is stated in circuit under test, the output end of external probe is connected with zero sequence current mutual inductor, and the zero-sequence current is mutual
The output end of sensor is connected with linear operational amplifier, and the output end of the linear operational amplifier is also connected with voltage comparator
And analog to digital conversion circuit.
As a preferred technical solution of the present invention, the main control chip uses 8051 enhanced series monolithics
STCl5F2K60S2, and main control chip is also connected with battery and data storage.
As a preferred technical solution of the present invention, the sound and light alarm module includes Current amplifier driver, described
The output end of Current amplifier driver is connected with buzzer and flash lamp.
As a preferred technical solution of the present invention, analog-digital conversion circuit as described uses 10 A/D conversion chips
TLC1543, and the communication port for being connected to main control chip of the DATAOUT of chip.
It compared with prior art, the beneficial effects of the present invention are: should be based on the electric wiring leak current fault inspection that signal triggers
Device is surveyed, by the way that zero-sequence current detection module is arranged, external circuit is connected with crocodile clip using external probe, utilizes zero-sequence current
Mutual inductor carries out zero-sequence current detection, carries out current signal processing in conjunction with linear operational amplifier and voltage comparator, recycles
Breaker protector forms closed loop feedback control, effectively realizes down circuitry protection operation；It can by setting buzzer and flash lamp
To realize that light warning operates；The present invention can effectively detect leaky, and sound an alarm while realizing circuit protection in time,
Reduce safety accident odds.
Detailed description of the invention
Fig. 1 is modular structure schematic diagram of the present invention；
Fig. 2 is schematic structural view of the invention；
Fig. 3 is analog to digital conversion circuit schematic diagram.
In figure: 1- fitting machine box；2- liquid crystal display；3- function selection key；4- integrated circuit board；5- main control chip；
6- zero-sequence current detection module；7- breaker protector；8- sound and light alarm module；The external probe of 9-；10- crocodile clip；11- zero sequence electricity
Current transformer；12- linear operational amplifier；13- voltage comparator；14- battery；15- data storage；16- Current amplifier
Driver；17- buzzer；18- flash lamp；19- analog to digital conversion circuit.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment:
It please refers to Fig.1 to Fig.3, the present invention provides a kind of technical solution: a kind of electric energy meter liquid-crystal apparatus fault detection method
And system, including fitting machine box 1, the outer surface of the fitting machine box 1 be inlaid with liquid crystal display 2 and function selection key 3, pacifies
Integrated circuit board 4 is installed inside installation box 1, main control chip 5 is welded on the integrated circuit board 4, the main control chip 5
Data input pin is connected with zero-sequence current detection module 6, and order output terminal is connected with breaker protector 7 and sound and light alarm module 8；
The zero-sequence current detection module 6 includes external probe 9, and the external probe 9 is pierced by from the side of fitting machine box 1, input terminal
It is connected with crocodile clip 10, for 10 clamping connection of crocodile clip in circuit under test, it is mutual that the output end of external probe 9 is connected with zero-sequence current
Sensor 11, the output end of the zero sequence current mutual inductor 11 are connected with linear operational amplifier 12, the linear operational amplifier
12 output end is also connected with voltage comparator 13 and analog to digital conversion circuit 19；
The main control chip 5 uses 8051 enhanced series monolithic STCl5F2K60S2, and main control chip 5 is also connected with
There are battery 14 and data storage 15；The sound and light alarm module 8 includes Current amplifier driver 16, and the Current amplifier drives
The output end of dynamic device 16 is connected with buzzer 17 and flash lamp 18；Analog-digital conversion circuit as described 19 converts core using 10 A/D
Piece TLC1543, and the communication port for being connected to main control chip 5 of the DATAOUT of chip.
The working principle of the invention: the fitting machine box 1 is made of insulation shielding material, for protecting internal circuit knot
Structure；The integrated circuit board 4 is used to all circuit structures assembling integral structure, and the function selection key 3 is used for
Corresponding operation mode and running parameter setting are selected, the liquid crystal display 2 can show current operation value, the master control core
Piece 5 carries out data receiver and Data Analysis Services；
For the zero-sequence current detection module 6 for detecting whether there is leaky, the crocodile clip 10 can be convenient folder
It holds in the line node for being fixed on and needing to detect, the external probe 9 is wired to crocodile clip 10, will be on crocodile clip 10
Signal be introduced to zero sequence current mutual inductor 11, when there is leaky to occur, the secondary side of zero sequence current mutual inductor 11 is generated
Corresponding induced current, linear operational amplifier 12 are fed through voltage comparator after the induced current of generation is carried out Linear Amplifer
13 and analog to digital conversion circuit 19, the end in the same direction of the voltage comparator 13 is connected with reference data voltage, carries out pair with input value
Than exporting high level when being less than reference value, 5 decision circuitry of main control chip is normal at this time, exports low electricity when being greater than reference value
Flat, main control chip 5 can then trigger breaker protector 7 and sound and light alarm module 8 immediately, and the triggering breaker protector 7 is by circuit
Power supply at disconnect, the Current amplifier driver 16 will be after output Current amplifier, and driving buzzer 17 issues alarm, simultaneously
Light flash lamp 18；
Collected analog voltage is converted into digital signal by analog-digital conversion circuit as described 19, and is sent into main control chip 5,
The main control chip 5 calls internal processes to handle current data, and stores to data storage 15, while passing through liquid crystal
Display 2 is shown.
The electric wiring leak current fault detection device based on signal triggering, by the way that zero-sequence current detection module 6, benefit is arranged
External circuit is connected with external probe 9 and crocodile clip 10, carries out zero-sequence current detection, bonding wire using zero sequence current mutual inductor 11
Property operational amplifier 12 and voltage comparator 13 carry out current signal processing, recycle breaker protector 7 formed closed loop feedback control
System effectively realizes down circuitry protection operation；Light warning operation may be implemented by setting buzzer 17 and flash lamp 18；This
Invention can effectively detect leaky, and sound an alarm while realizing circuit protection in time, reduce the several of safety accident generation
Rate.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (4)
1. a kind of electric energy meter liquid-crystal apparatus fault detection method and system, including fitting machine box (1), the fitting machine box (1)
Outer surface is inlaid with liquid crystal display (2) and function selection key (3), is equipped with integrated circuit board inside fitting machine box (1)
(4), it is characterised in that: be welded with main control chip (5) on the integrated circuit board (4), the data input of the main control chip (5)
End is connected with zero-sequence current detection module (6), and order output terminal is connected with breaker protector (7) and sound and light alarm module (8)；Institute
Stating zero-sequence current detection module (6) includes external probe (9), and the external probe (9) is pierced by from the side of fitting machine box (1),
Input terminal is connected with crocodile clip (10), and crocodile clip (10) clamping connection is in circuit under test, the output end connection of external probe (9)
Having zero sequence current mutual inductor (11), the output end of the zero sequence current mutual inductor (11) is connected with linear operational amplifier (12),
The output end of the linear operational amplifier (12) is also connected with voltage comparator (13) and analog to digital conversion circuit (19).
2. a kind of electric energy meter liquid-crystal apparatus fault detection method according to claim 1 and system, it is characterised in that: described
Main control chip (5) uses 8051 enhanced series monolithic STCl5F2K60S2, and main control chip (5) is also connected with battery
(14) and data storage (15).
3. a kind of electric energy meter liquid-crystal apparatus fault detection method according to claim 1 and system, it is characterised in that: described
Sound and light alarm module (8) includes Current amplifier driver (16), and the output end of the Current amplifier driver (16) is connected with bee
Ring device (17) and flash lamp (18).
4. a kind of electric energy meter liquid-crystal apparatus fault detection method according to claim 1 and system, it is characterised in that: described
Analog to digital conversion circuit (19) uses 10 A/D conversion chip TLC1543, and the DATAOUT of chip is connected to main control chip
(5) communication port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711132970.7A CN110492446A (en) | 2017-11-15 | 2017-11-15 | A kind of electric energy meter liquid-crystal apparatus fault detection method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711132970.7A CN110492446A (en) | 2017-11-15 | 2017-11-15 | A kind of electric energy meter liquid-crystal apparatus fault detection method and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110492446A true CN110492446A (en) | 2019-11-22 |
Family
ID=68543033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711132970.7A Pending CN110492446A (en) | 2017-11-15 | 2017-11-15 | A kind of electric energy meter liquid-crystal apparatus fault detection method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110492446A (en) |
-
2017
- 2017-11-15 CN CN201711132970.7A patent/CN110492446A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20191122 |
|
| WD01 | Invention patent application deemed withdrawn after publication |