CN202018489U - Leakage-detecting circuit - Google Patents
Leakage-detecting circuit Download PDFInfo
- Publication number
- CN202018489U CN202018489U CN2011201023394U CN201120102339U CN202018489U CN 202018489 U CN202018489 U CN 202018489U CN 2011201023394 U CN2011201023394 U CN 2011201023394U CN 201120102339 U CN201120102339 U CN 201120102339U CN 202018489 U CN202018489 U CN 202018489U
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- circuit
- residual current
- electric
- single chip
- leakage
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Abstract
The utility model relates to the field of electronic circuits, in particular to a leakage-detecting circuit, which comprises a residual-current collecting circuit, a singlechip control circuit, a display circuit and a bus communication circuit, wherein an output signal of the residual-current collecting circuit is sent to the singlechip control circuit through an A/D (Analog-to-Digital) converting circuit, the display circuit and the bus communication circuit are connected through the control output of the singlechip control circuit, circuit bidirectional data communication are generated by the singlechip control circuit and an analog switching signal, and a circuit is generated by the analog switching signal to send the signal to the residual-current collecting circuit. In the utility model, multistage protection contrast is adopted as a reference alarming value; and meanwhile, the singlechip control circuit is applied to display leakage alarming current, data is remotely transmitted to a fire-fighting control center or a duty room through a system bus to achieve the purpose of real-time monitoring, and the reliable operation of the circuit is guaranteed.
Description
Technical field
The utility model relates to electronic circuit field, particularly be a kind of electric-leakage detection circuit.
Background technology
The residual current signal is commonly called as electric leakage signal, when earth leakage protection is applied in the scope that Medical Devices or fire-fighting emergency power supply lamp do not allow to cut off the power supply, if because of earth leakage protective device misoperation or warning, just will cause serious accident to people.
Summary of the invention
The purpose of this utility model is to provide a kind of electric-leakage detection circuit that ensures the circuit reliability service.
The technical scheme that its technical matters that solves the utility model adopts is: a kind of electric-leakage detection circuit, comprise the residual current Acquisition Circuit, single chip machine controlling circuit, display circuit, the bus communication circuit, the output signal of described residual current Acquisition Circuit by A the D change-over circuit send to single chip machine controlling circuit, connect display circuit and bus communication circuit by single chip machine controlling circuit control output, described single chip machine controlling circuit and analog switch signal generating circuit bidirectional data communication, and send signal to the residual current Acquisition Circuit by the analog switch signal generating circuit.
Described residual current Acquisition Circuit by the telefault resistance in series after, parallel diode and electric capacity, the commutation diode of connecting again constitutes.
Described analog switch signal generating circuit is formed 8 sections different simulation residual current voltage signals by parallel resistance R1-R16.
Described bus communication circuit is connected to com port by 75176 communication interface chips.
By adopting above-mentioned technical scheme; the beneficial effects of the utility model are: the utility model adopts multi-stage protection contrast conduct with reference to alarming value; use single chip machine controlling circuit simultaneously; show the leakage-current alarm electric current; and by system bus with data remote to fire protection control center or duty room; reach the purpose of real-time monitoring, ensure the reliability service of circuit.
Description of drawings
Fig. 1 is a frame assumption diagram of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
As shown in Figure 1, a kind of electric-leakage detection circuit of the present utility model, comprise residual current Acquisition Circuit 1, single chip machine controlling circuit 2, display circuit 3, bus communication circuit 4, the output signal of described residual current Acquisition Circuit 1 by A D change-over circuit 11 send to single chip machine controlling circuit 2, connect display circuit 3 and bus communication circuit 4 by single chip machine controlling circuit 2 control outputs, described single chip machine controlling circuit 2 and analog switch signal generating circuit 21 bidirectional data communications, and send signal to residual current Acquisition Circuit 1 by analog switch signal generating circuit 21.
As shown in Figure 2, form residual current input Acquisition Circuit by telefault LN, resistance 1R1, adjustable resistance W, diode appearance D1, diode D2, capacitor C 1, diode D3, when phase line has earth fault, pass telefault LN and induction is arranged during electric leakage signal, the telefault LN other end produces small AC signal through diode D3 rectification, output direct current electric leakage signal, through the 1R2 current limliting be input to A the 2nd pin of D conversion chip U4 input end, through A after the D conversion with data-signal after, be input to the 7th, 8,27 pin of single-chip microcomputer U1.
B point current potential is subjected to the 3rd foot control system of analog switch signal circuit U3, resistance R 1-R16 forms the dividing potential drop comparison reference, the 4th of analog switch signal circuit U3,2,5,1,12,15,14,13 pin and resistance R 1-R16 form bleeder circuit, form 8 sections different simulation residual current voltage signals, by single-chip microcomputer U1 the control of analog switch signal circuit U3 is switched, the residual current signal of the 3rd pin output different brackets of analog switch signal circuit U3, this signal flows to resistance 1R1 through telefault LN Inside coil, through diode D1, the D2 amplitude limit is adjusted, diode D3 rectification, resistance 1R2 current limliting, capacitor C 2 filtering, be connected to A D conversion chip U4D the 2nd pin, carry out A the D data-switching, after single-chip microcomputer U1 internal data is handled judgement, divide two-way output, first via output drives display chip U2 and shows current electrical leakage, by single-chip microcomputer U1 the 36th, 37,38, the 1st of 39 pin and display chip U2,2,3,4 pin are formed the indicated data communication circuit, the second tunnel output is by the 11st of single-chip microcomputer U1,10, the 1st of 25 pin and bus communication IC circuit 1,2,3,4 pin are formed the RS485 telecommunication circuit, transmit real-time current electric leakage data message by single-chip microcomputer U1 to bus communication IC circuit 1, be sent to PC through bus communication IC circuit 1, show current leakage current and failure condition by the PC configuration software.
Above-described only is a preferred embodiment of the present utility model, can not limit the scope that this practicality is implemented, and every equalization of being done according to the utility model claim changes and decorates, and all should still belong in the scope that the utility model contains.
Claims (4)
1. electric-leakage detection circuit, it is characterized in that: comprise residual current Acquisition Circuit (1), single chip machine controlling circuit (2), display circuit (3), bus communication circuit (4), the output signal of described residual current Acquisition Circuit (1) by A D change-over circuit (11) send to single chip machine controlling circuit (2), connect display circuit (3) and bus communication circuit (4) by single chip machine controlling circuit (2) control output, described single chip machine controlling circuit (2) and analog switch signal generating circuit (21) bidirectional data communication, and send signal to residual current Acquisition Circuit (1) by analog switch signal generating circuit (21).
2. a kind of electric-leakage detection circuit according to claim 1 is characterized in that: described residual current Acquisition Circuit (1) by the telefault resistance in series after, parallel diode and electric capacity, the commutation diode of connecting again constitutes.
3. a kind of electric-leakage detection circuit according to claim 1 is characterized in that: described analog switch signal generating circuit (21) is formed 8 sections different simulation residual current voltage signals by parallel resistance R1-R16.
4. a kind of electric-leakage detection circuit according to claim 1 is characterized in that: described bus communication circuit (4) is connected to com port by 75176 communication interface chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201023394U CN202018489U (en) | 2011-04-11 | 2011-04-11 | Leakage-detecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201023394U CN202018489U (en) | 2011-04-11 | 2011-04-11 | Leakage-detecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202018489U true CN202018489U (en) | 2011-10-26 |
Family
ID=44812158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201023394U Expired - Fee Related CN202018489U (en) | 2011-04-11 | 2011-04-11 | Leakage-detecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202018489U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106443437A (en) * | 2016-11-16 | 2017-02-22 | 浙江方圆电气设备检测有限公司 | A residual current adjusting device |
| CN106443291A (en) * | 2015-08-04 | 2017-02-22 | 浙江诺尔康神经电子科技股份有限公司 | Electric leakage detecting device and electric leakage detecting method for artificial cochlear implantation prosthesis |
-
2011
- 2011-04-11 CN CN2011201023394U patent/CN202018489U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106443291A (en) * | 2015-08-04 | 2017-02-22 | 浙江诺尔康神经电子科技股份有限公司 | Electric leakage detecting device and electric leakage detecting method for artificial cochlear implantation prosthesis |
| CN106443437A (en) * | 2016-11-16 | 2017-02-22 | 浙江方圆电气设备检测有限公司 | A residual current adjusting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111026 Termination date: 20130411 |