CN107677914A - A kind of Intelligent household leakage protector and guard method - Google Patents
A kind of Intelligent household leakage protector and guard method Download PDFInfo
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- CN107677914A CN107677914A CN201710592721.XA CN201710592721A CN107677914A CN 107677914 A CN107677914 A CN 107677914A CN 201710592721 A CN201710592721 A CN 201710592721A CN 107677914 A CN107677914 A CN 107677914A
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- chip microcomputer
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- intelligent household
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- electric current
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- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a kind of Intelligent household leakage protector; including acquisition terminal and residual current sensor; acquisition terminal turns potential circuit, gain circuitry, rectification circuit, single-chip microcomputer and communication module including electric current; residual current sensor turns potential circuit with electric current and is connected; electric current turns potential circuit and is connected with gain circuitry; gain circuitry is connected with rectification circuit; the GPIO mouths of single-chip microcomputer are connected with gain circuitry; the ADC mouths of single-chip microcomputer are connected with rectification circuit, and the UART mouths of single-chip microcomputer are connected with communication module.Intelligent household leakage protector and guard method can be quickly detected user equipment drain conditions, and inform long-range repair personnel by communication module, repair personnel is quickly known the information of user equipment electric leakage.
Description
Technical field
The present invention relates to family expenses electric leakage protection technology field, a kind of Intelligent household leakage protector and protection side are referred in particular to
Method.
Background technology
At present, low-voltage distribution network user equipment in rural area leaks electricity, and causes the breakdown repair of power distribution station intelligence total security tripping operation frequent,
The 95% of power supply station's breakdown repair amount is accounted for, and is all that failure blind spot is rushed to repair, it is necessary to which repair personnel is to power distribution station low-voltage customer
Exclusive method finds trouble point one by one, and repair personnel both has security risk, and time and effort consuming, extends troubleshooting time and recovery
Electric power feeding time, power supply reliability is reduced, add the probability of customer complaint.China Patent Publication No. CN204706260U, it is public
Open on October 2015 day 14, it is entitled《Investigation of visiting one house after another analogue means》Utility model patent in disclose one kind and visit one house after another investigation
Analogue means, including supply unit, supply unit include isolating transformer, the power-supply filter being sequentially connected（That is three phase mains
Wave filter）With current leakage detection protection device, isolating transformer electrically connects with city, in addition to fault simulator, fault simulator and leakage
Electro-detection protector connects, and fault simulator includes electric energy meter analogue means, low-voltage customer analogue means and automatic fault
Device is set, and current leakage detection protection device is connected with electric energy meter analogue means, electric energy meter analogue means and low-voltage customer
Analogue means connects, and automatic fault sets device to be loaded respectively with current leakage detection protection device, electric energy meter analogue means and family
Analogue means connects, and the automatic fault sets device to include some relays, resistance, electric capacity and rc absorber, relay
It is connected respectively with electric energy meter analogue means with low-voltage customer analogue means.It is disadvantageous in that, in the patent if it happens
Repair personnel still can not know electric leakage place in time during electric leakage, still have deficiency using upper.
The content of the invention
The purpose of the present invention be overcome in the prior art rural area low-voltage distribution network user equipment electric leakage when, repair personnel can not and
When find the position of fault, the defects of causing emergency repair time increase, there is provided a kind of Intelligent household leakage protector and guard method.
The purpose of the present invention is achieved by following technical proposals：
A kind of Intelligent household leakage protector, is powered by power circuit, including acquisition terminal and residual current sensor, and collection is eventually
End includes electric current and turns potential circuit, gain circuitry, rectification circuit, single-chip microcomputer and communication module, residual current sensor and electric current
Turn potential circuit to be connected, electric current turns potential circuit and with gain circuitry is connected, and gain circuitry is connected with rectification circuit, monolithic
The GPIO mouths of machine are connected with gain circuitry, and the ADC mouths of single-chip microcomputer are connected with rectification circuit, and the UART mouths of single-chip microcomputer are with leading to
Letter module is connected.Chip Microcomputer A/D C-terminal mouth will be directly connected to after alternating current after filtering rectification, uses single-chip microcomputer on piece
Sampling, because requirement of real-time is higher, virtual value scheme is calculated using simple maximum value process, and multiple weeks are used to reduce error
Expect the mode averaged and calculate maximum, to improve speed, by signal rectification, each cycle there are two peak values.Design
Each periodic sampling 128 times, sample frequency requirement is 6.4K.
As a kind of preferred scheme, residual current sensor includes magnet ring, and three-phase power line and zero line pass through magnet ring, magnet ring
On also winding be provided with detection coil, detection coil turns potential circuit with electric current and is connected.
As a kind of preferred scheme, the scope of the electric current of detection coil collection is 0-300mA, and the frequency of the electric current of collection is
10HZ。
As a kind of preferred scheme, single-chip microcomputer is the single-chip microcomputer that signal is MC9S08DZ60.Single-chip microcomputer uses Freescale
Automotive grade chip MC9S08DZ60, the chip maximum operation frequency is 48MHz, and ADC maximums sample rate is 400KHz, and RAM is
4KB, use enough.
As a kind of preferred scheme, communication module is GPRS communication modules, and GPRS communication modules are provided with the SIM for identifying
Card, GPRS communication modules are connected by antenna with communication base station.Current sampling data is stored using 2 bytes, and resolution ratio is about
5uA or so, meet to require.Data volume per second is 2*10=20B, and rate request is not high, uses GPRS transmission；Every month number
It is 2*10*3600*24*30=49.4MB according to amount.GPRS module uses the M35 modules of Yi Yuan companies, package area only 20*24
Mm, small volume, it is easy to minimize；Small power consumption, reduce operation power consumption.The mobile 80M Internet of Things network interface cards of SIM card selection, flow is suitable,
And mobile network is preferable in the vast rural areas covering.
A kind of guard method of Intelligent household leakage protector, residual current sensor detection residual current, when remaining electricity
Outflow is current, and residual current sensor produces induced-current, and induced-current turns potential circuit through overcurrent and is changed into magnitude of voltage simultaneously
Preliminary amplification, the magnitude of voltage being then exaggerated carry out secondary amplification by gain circuitry, and the voltage after secondary amplification passes through rectification
Become d. c. voltage signal after circuit rectifies, single-chip microcomputer is received to send to signal by communication module after d. c. voltage signal and connect
Receiving end.
As a kind of preferred scheme, the method for residual current sensor detection residual current is specially three-phase power line and zero
Line passes through magnet ring, and when leaky occurs, electric current returns without going past zero line, the black current phasor of magnet ring and is not zero, and examines
Test coil produces induced-current.
The invention has the advantages that Intelligent household leakage protector and guard method can be quickly detected user equipment leakage
Electric situation, and long-range repair personnel is informed by communication module, repair personnel is quickly known the letter of user equipment electric leakage
Breath.Reduce troubleshooting time and recover electric power feeding time, improve power supply reliability.
Brief description of the drawings
Fig. 1 is a kind of schematic block circuit diagram of the present invention；
Fig. 2 is the structure chart of residual current sensor.
Wherein：1st, residual current sensor, 2, electric current turn potential circuit, 3, gain circuitry, 4, rectification circuit, 5, monolithic
Machine, 6, GPRS communication modules, 7, SIM card, 8, magnet ring, 9, detection coil.
Embodiment
The present invention is further described with reference to the accompanying drawings and examples.
Embodiment：A kind of Intelligent household leakage protector, as shown in figure 1, powered by power circuit, including acquisition terminal and
Residual current sensor 1, acquisition terminal turn potential circuit 2, gain circuitry 3, rectification circuit 4, single-chip microcomputer 5 and communication including electric current
Module, residual current sensor turn potential circuit with electric current and are connected, and electric current turns potential circuit and is connected with gain circuitry, gain
Circuit is connected with rectification circuit, and the GPIO mouths of single-chip microcomputer are connected with gain circuitry, ADC mouths and the rectification circuit phase of single-chip microcomputer
Connection, the UART mouths of single-chip microcomputer are connected with communication module.
Chip Microcomputer A/D C-terminal mouth will be directly connected to after alternating current after filtering rectification, be sampled using single-chip microcomputer on piece,
Because requirement of real-time is higher, virtual value scheme is calculated using simple maximum value process, to reduce error using expecting in multiple weeks
The mode averaged calculates maximum, to improve speed, by signal rectification, each cycle is had two peak values.Design is each
Periodic sampling 128 times, sample frequency requirement is 6.4K.
Single-chip microcomputer is the single-chip microcomputer that signal is MC9S08DZ60.Communication module is GPRS communication modules 6, GPRS communication modules
Provided with the SIM card 7 for identification, GPRS communication modules are connected by antenna with communication base station.Single-chip microcomputer uses Freescale
Automotive grade chip MC9S08DZ60, the chip maximum operation frequency is 48MHz, and ADC maximums sample rate is 400KHz, and RAM is
4KB, use enough.Current sampling data is stored using 2 bytes, and resolution ratio is about 5uA or so, meets to require.Data volume per second
For 2*10=20B, rate request is not high, uses GPRS transmission；Every month data volume be 2*10*3600*24*30=
49.4MB.GPRS module uses the M35 modules of Yi Yuan companies, package area only 20*24 mm, small volume, is easy to minimize；Work(
Consume small, reduction operation power consumption.The mobile 80M Internet of Things network interface cards of SIM card selection, flow is suitable, and mobile network is in vast rural area
Regional coverage is preferable.
For residual current sensor as shown in Fig. 2 including magnet ring 8, three-phase power line and zero line pass through magnet ring, are also twined on magnet ring
Detection coil 9 is arranged with, detection coil turns potential circuit with electric current and is connected.The scope of the electric current of detection coil collection is 0-
300mA, the frequency of the electric current of collection is 10HZ.
A kind of guard method of Intelligent household leakage protector, residual current sensor detection residual current, when remaining electricity
Outflow is current, and residual current sensor produces induced-current, and induced-current turns potential circuit through overcurrent and is changed into magnitude of voltage simultaneously
Preliminary amplification, the magnitude of voltage being then exaggerated carry out secondary amplification by gain circuitry, and the voltage after secondary amplification passes through rectification
Become d. c. voltage signal after circuit rectifies, single-chip microcomputer is received to send to signal by communication module after d. c. voltage signal and connect
Receiving end.
The method of residual current sensor detection residual current is specially that three-phase power line and zero line pass through magnet ring, works as generation
During leaky, electric current returns without going past zero line, the black current phasor of magnet ring and is not zero, and detection coil produces induced electricity
Stream.
Claims (7)
1. a kind of Intelligent household leakage protector, is powered by power circuit, it is characterized in that, including acquisition terminal and residual current biography
Sensor, acquisition terminal turn potential circuit, gain circuitry, rectification circuit, single-chip microcomputer and communication module including electric current, and residual current passes
Sensor turns potential circuit with electric current and is connected, and electric current turns potential circuit and is connected with gain circuitry, gain circuitry and rectification circuit
It is connected, the GPIO mouths of single-chip microcomputer are connected with gain circuitry, and the ADC mouths of single-chip microcomputer are connected with rectification circuit, single-chip microcomputer
UART mouths be connected with communication module.
2. a kind of Intelligent household leakage protector according to claim 1, it is characterized in that, described residual current sensor
Including magnet ring, three-phase power line and zero line pass through magnet ring, are also wound on magnet ring and are provided with detection coil, detection coil turns electricity with electric current
Volt circuit is connected.
3. a kind of Intelligent household leakage protector according to claim 2, it is characterized in that, the collection of described detection coil
The scope of electric current is 0-300mA, and the frequency of the electric current of collection is 10HZ.
4. according to a kind of Intelligent household leakage protector described in claim 1 or 2 or 3, it is characterized in that, described single-chip microcomputer is
Signal is MC9S08DZ60 single-chip microcomputer.
5. a kind of Intelligent household leakage protector according to claim 4, it is characterized in that, described communication module is GPRS
Communication module, GPRS communication modules are provided with the SIM card for identifying, GPRS communication modules are connected by antenna with communication base station
Connect.
6. a kind of guard method of Intelligent household leakage protector, it is characterized in that, residual current sensor detection residual current, when
When residual current occurs, residual current sensor produces induced-current, and induced-current turns potential circuit through overcurrent and is changed into electricity
Pressure value is simultaneously tentatively amplified, and then exaggerated magnitude of voltage carries out secondary amplification by gain circuitry, and the voltage after secondary amplification leads to
Become d. c. voltage signal after over commutation circuit rectifies, single-chip microcomputer receive after d. c. voltage signal by communication module send to
Signal receiving end.
7. a kind of guard method of Intelligent household leakage protector according to claim 6, it is characterized in that, described residue
The method of current sensor detection residual current is specially that three-phase power line and zero line pass through magnet ring, when leaky occurs,
Electric current returns without going past zero line, the black current phasor of magnet ring and is not zero, and detection coil produces induced-current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710592721.XA CN107677914A (en) | 2017-07-19 | 2017-07-19 | A kind of Intelligent household leakage protector and guard method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710592721.XA CN107677914A (en) | 2017-07-19 | 2017-07-19 | A kind of Intelligent household leakage protector and guard method |
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| Publication Number | Publication Date |
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| CN107677914A true CN107677914A (en) | 2018-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710592721.XA Pending CN107677914A (en) | 2017-07-19 | 2017-07-19 | A kind of Intelligent household leakage protector and guard method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108931687A (en) * | 2018-04-27 | 2018-12-04 | 东南大学 | Household electric leakage real-time monitoring system based on Bluetooth communication |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85205360U (en) * | 1985-12-07 | 1988-06-08 | 柏正东 | Phase-sensitive rectification type pulsating current mode protective cut-out |
| CN103308744A (en) * | 2013-05-28 | 2013-09-18 | 国家电网公司 | Leakage current detector for ground wire of high-voltage cable shielding net |
| CN104459449A (en) * | 2014-12-31 | 2015-03-25 | 常熟市九洲电器设备有限公司 | Electric leakage detection device of electrical appliance |
| CN204666757U (en) * | 2015-05-08 | 2015-09-23 | 无锡乐尔科技有限公司 | Leakage current sensor |
| CN106872839A (en) * | 2015-12-11 | 2017-06-20 | 天津赛思科技发展有限公司 | Arc monitoring system is climbed in a kind of high-tension insulator electric leakage |
| CN207281216U (en) * | 2017-07-19 | 2018-04-27 | 国网浙江省电力公司衢州供电公司 | A kind of Intelligent household leakage protector |
-
2017
- 2017-07-19 CN CN201710592721.XA patent/CN107677914A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85205360U (en) * | 1985-12-07 | 1988-06-08 | 柏正东 | Phase-sensitive rectification type pulsating current mode protective cut-out |
| CN103308744A (en) * | 2013-05-28 | 2013-09-18 | 国家电网公司 | Leakage current detector for ground wire of high-voltage cable shielding net |
| CN104459449A (en) * | 2014-12-31 | 2015-03-25 | 常熟市九洲电器设备有限公司 | Electric leakage detection device of electrical appliance |
| CN204666757U (en) * | 2015-05-08 | 2015-09-23 | 无锡乐尔科技有限公司 | Leakage current sensor |
| CN106872839A (en) * | 2015-12-11 | 2017-06-20 | 天津赛思科技发展有限公司 | Arc monitoring system is climbed in a kind of high-tension insulator electric leakage |
| CN207281216U (en) * | 2017-07-19 | 2018-04-27 | 国网浙江省电力公司衢州供电公司 | A kind of Intelligent household leakage protector |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108931687A (en) * | 2018-04-27 | 2018-12-04 | 东南大学 | Household electric leakage real-time monitoring system based on Bluetooth communication |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 324400 9 Ping Zheng Road, Longzhou street, Longyou County, Quzhou, Zhejiang Applicant after: Quzhou electric company of State Grid Zhejiang Electric Power Company Applicant after: STATE GRID ZHEJIANG LONGYOU COUNTY POWER SUPPLY CO., LTD. Applicant after: State Grid Corporation of China Address before: 324000 6 New River along Kecheng District, Quzhou, Zhejiang Applicant before: Quzhou electric company of State Grid Zhejiang Electric Power Company Applicant before: STATE GRID ZHEJIANG LONGYOU COUNTY POWER SUPPLY CO., LTD. Applicant before: State Grid Corporation of China |
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20180209 |