CN206281931U - A kind of electric-leakage detection circuit with anti-tampering function - Google Patents
A kind of electric-leakage detection circuit with anti-tampering function Download PDFInfo
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- CN206281931U CN206281931U CN201621438977.2U CN201621438977U CN206281931U CN 206281931 U CN206281931 U CN 206281931U CN 201621438977 U CN201621438977 U CN 201621438977U CN 206281931 U CN206281931 U CN 206281931U
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Abstract
The utility model discloses a kind of electric-leakage detection circuit with anti-tampering function, including leakage current input, one-level amplification module, two grades of amplification modules, first passage output module, second channel output module, the leakage current input connects one-level amplification module, the one-level amplification module connects two grades of amplification modules, the first passage output module and second channel output module all connect two grades of amplification modules, the utility model passes through first passage output module, second channel output module exports total electric current, leakage current i.e. of the present utility model is exported by two passages, substantially increase accuracy, and the utility model filters direct current signal and influences by electric capacity C18, substantially increase accuracy, effectively shielding hand high-frequency signal interference.
Description
Technical field
The utility model is related to a kind of electric-leakage detection circuit with anti-tampering function.
Background technology
The existing anti-tampering ability of electric-leakage detection circuit is weak, easily by external influence, and existing detection of electrical leakage electricity
Road accuracy is low.
Utility model content
The purpose of this utility model is in overcoming the shortcomings of existing product, there is provided a kind of electric leakage inspection with anti-tampering function
Slowdown monitoring circuit.
In order to achieve the above object, the utility model is achieved through the following technical solutions：
A kind of electric-leakage detection circuit with anti-tampering function, including leakage current input, one-level amplification module, two grades put
Big module, first passage output module, second channel output module, the leakage current input connect one-level amplification module, institute
State one-level amplification module and connect two grades of amplification modules, the first passage output module and second channel output module all connect two
Level amplification module, the first passage output module include electric capacity C21, electric capacity C22, diode D22, resistance R50, resistance R70,
Resistance R72, resistance R74, resistance R50, resistance R60, resistance R61, resistance R64, operational amplifier U7C, the one of the electric capacity C21
Two grades of amplification modules of end connection, the in-phase input end of the other end concatenation operation amplifier U7C of the electric capacity C21, the computing
The in-phase input end of amplifier U7C is led to by the reverse input end that resistance R50 connects earth signal GND, the operational amplifier U7C
The reverse input end for crossing resistance R72 connection earth signals GND, the operational amplifier U7C connects resistance R60's by resistance R61
One end, the output end of the other end concatenation operation amplifier U7C of the resistance R60, the output end of the operational amplifier U7C is led to
The positive pole of resistance R74 connection diodes D22 is crossed, the positive pole of the diode D22 is described by electric capacity C22 connection earth signals GND
Resistance R64 is in parallel with diode D22, and the positive pole of negative pole connection the power supply VCC, the diode D22 of the diode D22 connects
One end of connecting resistance R70, the other end of the resistance R70 is the first output end after leakage current conversion, and the second channel is defeated
Go out one end connection two grade of the module including resistance R62, resistance R71, resistance R73, diode D2, electric capacity C19, the resistance R6 to put
Big module, the other end of the resistance R62 connects the other end of earth signal GND, the resistance R62 by electricity by electric capacity C19
Resistance R71 connections power supply VCC, the diode D2 and resistance R71 are in parallel, and the other end of the resistance R62 connects resistance R73's
One end, the other end of the resistance R73 is the second output end after leakage current conversion.
The one-level amplification module includes electric capacity C20, electric capacity C17, diode D20, diode D21, resistance R40, resistance
R41, resistance R49, resistance R59, resistance R67, operational amplifier U7A, one end of the leakage current input connection electric capacity C20,
The other end connection earth signal GND, the diode D20, diode D21, resistance R40 of the electric capacity C20 all with electric capacity C20 phases
Parallel connection, the input in the same direction of the operational amplifier U7A connects earth signal GND, one end of the electric capacity C20 by resistance R41
One end of resistance R59, the reverse input of the other end concatenation operation amplifier U7A of the resistance R59 are connected by resistance R49
End, the reverse input end of the operational amplifier U7A passes through the output end of resistance R67 concatenation operation amplifiers U7A, the electric capacity
C17 is in parallel with resistance R67.
Two grades of amplification modules include electric capacity C18, resistance R42, resistance R46, resistance R51, resistance R52, resistance R75,
The output end of one end concatenation operation amplifier U7A of operational amplifier U7D, the electric capacity C18, the other end of the electric capacity C18
The other end of earth signal GND, the electric capacity C18 is connected also by resistance R51 concatenation operation amplifiers U7D's by resistance R75
Input in the same direction, the reverse input end of the operational amplifier U7D connects earth signal GND, the operation amplifier by resistance R52
The reverse input end of device U7D connects one end of resistance R42 by resistance R46, and the other end concatenation operation of the resistance R42 is amplified
The output end of device U7D.
The power supply VCC is 5V.
The electric capacity C20 is 0.1uF, and the electric capacity C17 is 0.01uF.
The electric capacity C18 is 2.2uF.
The electric capacity C21 is 2.2uF, and the electric capacity C19, electric capacity C22 are 0.001uF.
The beneficial effects of the utility model are as follows：The utility model is exported by first passage output module, second channel
Module exports total electric current, i.e., leakage current of the present utility model is exported by two passages, substantially increases accuracy, Er Qieben
Utility model filters direct current signal by electric capacity C18 to be influenceed, and substantially increases accuracy, effectively the interference of shielding hand high-frequency signal.
Brief description of the drawings
Fig. 1 is circuit theory schematic diagram of the present utility model,
Specific embodiment
The technical solution of the utility model is described further with reference to Figure of description：
As shown in figure 1, a kind of electric-leakage detection circuit with anti-tampering function, including leakage current input, one-level are amplified
Module 1, two grades of amplification modules 2, first passage output module 3, second channel output modules 4, the leakage current input connection
One-level amplification module 1, the one-level amplification module 1 connects two grades of amplification modules 2, the first passage output module 3 and second
Passage output module 4 all connects two grades of amplification modules 2, and the first passage output module 3 includes electric capacity C21, electric capacity C22, two
Pole pipe D22, resistance R50, resistance R70, resistance R72, resistance R74, resistance R50, resistance R60, resistance R61, resistance R64, computing
One end of amplifier U7C, the electric capacity C21 connect two grades of amplification modules, the other end concatenation operation amplifier of the electric capacity C21
The in-phase input end of U7C, the in-phase input end of the operational amplifier U7C connects earth signal GND, the fortune by resistance R50
The reverse input end for calculating amplifier U7C connects earth signal GND, the reverse input end of the operational amplifier U7C by resistance R72
One end of resistance R60, the output end of the other end concatenation operation amplifier U7C of the resistance R60, institute are connected by resistance R61
The output end for stating operational amplifier U7C connects the positive pole of diode D22 by resistance R74, and the positive pole of the diode D22 passes through
Electric capacity C22 connections earth signal GND, the resistance R64 and diode D22 are in parallel, and the negative pole of the diode D22 connects power supply
One end of the positive pole connection resistance R70 of VCC, the diode D22, after the other end of the resistance R70 is for leakage current conversion
First output end, the second channel output module 4 includes resistance R62, resistance R71, resistance R73, diode D2, electric capacity C19,
One end of the resistance R6 connects two grades of amplification modules, and the other end of the resistance R62 connects earth signal GND by electric capacity C19,
The other end of the resistance R62 is in parallel by resistance R71 connection power supplys VCC, the diode D2 and resistance R71, the electricity
One end of the other end connection resistance R73 of R62 is hindered, the other end of the resistance R73 is the second output end after leakage current conversion.
As shown in figure 1, one-level amplification module 1 includes electric capacity C20, electric capacity C17, diode D20, diode D21, resistance
R40, resistance R41, resistance R49, resistance R59, resistance R67, operational amplifier U7A, the leakage current input connection electric capacity C20
One end, the other end connection earth signal GND, the diode D20, diode D21, resistance R40 of the electric capacity C20 all with electricity
Hold C20 to be in parallel, the input in the same direction of the operational amplifier U7A connects earth signal GND, the electric capacity C20 by resistance R41
One end one end of resistance R59 is connected by resistance R49, the other end concatenation operation amplifier U7A's of the resistance R59 is reverse
Input, the reverse input end of the operational amplifier U7A passes through the output end of resistance R67 concatenation operation amplifiers U7A, described
Electric capacity C17 is in parallel with resistance R67.
As shown in figure 1, two grades of amplification modules 2 include electric capacity C18, resistance R42, resistance R46, resistance R51, resistance R52, electricity
Resistance R75, the output end of one end concatenation operation amplifier U7A of operational amplifier U7D, the electric capacity C18, the electric capacity C18's
The other end also passes through resistance R51 concatenation operation amplifiers by the other end that resistance R75 connects earth signal GND, the electric capacity C18
The input in the same direction of U7D, the reverse input end of the operational amplifier U7D connects earth signal GND, the fortune by resistance R52
The reverse input end for calculating amplifier U7D connects one end of resistance R42, the other end connection fortune of the resistance R42 by resistance R46
Calculate the output end of amplifier U7D.
As shown in figure 1, power supply VCC is 5V.
As shown in figure 1, electric capacity C20 is 0.1uF, the electric capacity C17 is 0.01uF.
As shown in figure 1, electric capacity C18 is 2.2uF.
As shown in figure 1, electric capacity C21 is 2.2uF, the electric capacity C19, electric capacity C22 are 0.001uF.
The measurement 0-1000mA electric leakages of first passage output module, measurement more than the 1000mA electric leakages of second channel output module,
Pinpoint accuracy, while increased electric capacity C18, C20, C17, C21, filters direct current signal influence.
The utility model exports total electric current, i.e. this practicality by first passage output module, second channel output module
New leakage current is exported by two passages, substantially increases accuracy, and the utility model is filtered directly by electric capacity C18
Stream effect of signals, substantially increases accuracy, effectively the interference of shielding hand high-frequency signal.
It should be noted that listed above is only a kind of specific embodiment of the present utility model.Obviously, the utility model
Above example is not limited to, there can also be many deformations.In a word, one of ordinary skill in the art can disclose from the utility model
Content directly derive or associate its have deformation, be considered as protection domain of the present utility model.
Claims (7)
1. a kind of electric-leakage detection circuit with anti-tampering function, it is characterised in that amplify mould including leakage current input, one-level
Block (1), two grades of amplification modules (2), first passage output module (3), second channel output modules (4), the leakage current input
End connection one-level amplification module (1), the one-level amplification module (1) connects two grades of amplification modules (2), the first passage output
Module (3) and second channel output module (4) all connect two grades of amplification modules (2), and the first passage output module (3) includes
Electric capacity C21, electric capacity C22, diode D22, resistance R50, resistance R70, resistance R72, resistance R74, resistance R50, resistance R60, electricity
Resistance R61, resistance R64, one end of operational amplifier U7C, the electric capacity C21 connect two grades of amplification modules, and the electric capacity C21's is another
The in-phase input end of one end concatenation operation amplifier U7C, the in-phase input end of the operational amplifier U7C is connected by resistance R50
The reverse input end of ground signalling GND, the operational amplifier U7C connects earth signal GND by resistance R72, and the computing is put
The reverse input end of big device U7C connects one end of resistance R60 by resistance R61, and the other end concatenation operation of the resistance R60 is put
The output end of big device U7C, the output end of the operational amplifier U7C connects the positive pole of diode D22 by resistance R74, described
The positive pole of diode D22 is in parallel by electric capacity C22 connection earth signals GND, the resistance R64 and diode D22, two pole
One end of the positive pole connection resistance R70 of negative pole connection the power supply VCC, the diode D22 of pipe D22, the resistance R70's is another
It is the first output end after leakage current conversion to hold, and the second channel output module (4) includes resistance R62, resistance R71, resistance
R73, diode D2, one end of electric capacity C19, the resistance R6 connect two grades of amplification modules, and the other end of the resistance R62 passes through
The other end of electric capacity C19 connections earth signal GND, the resistance R62 by resistance R71 connect power supply VCC, the diode D2 with
Resistance R71 is in parallel, one end of the other end connection resistance R73 of the resistance R62, and the other end of the resistance R73 is electric leakage
The second output end after circulationization.
2. there is the electric-leakage detection circuit of anti-tampering function according to claim 1, it is characterised in that the one-level amplifies mould
Block (1) including electric capacity C20, electric capacity C17, diode D20, diode D21, resistance R40, resistance R41, resistance R49, resistance R59,
Resistance R67, operational amplifier U7A, one end of the leakage current input connection electric capacity C20, the other end of the electric capacity C20
Connection earth signal GND, the diode D20, diode D21, resistance R40 are in parallel with electric capacity C20, the operational amplifier
The input in the same direction of U7A connects resistance by one end that resistance R41 connects earth signal GND, the electric capacity C20 by resistance R49
One end of R59, the reverse input end of the other end concatenation operation amplifier U7A of the resistance R59, the operational amplifier U7A
Reverse input end by the output end of resistance R67 concatenation operation amplifiers U7A, the electric capacity C17 and resistance R67 is in parallel.
3. there is the electric-leakage detection circuit of anti-tampering function according to claim 2, it is characterised in that two grades of amplifications mould
Block (2) includes electric capacity C18, resistance R42, resistance R46, resistance R51, resistance R52, resistance R75, operational amplifier U7D, the electricity
Hold the output end of one end concatenation operation amplifier U7A of C18, the other end of the electric capacity C18 connects earth signal by resistance R75
The other end of GND, the electric capacity C18 also by the input in the same direction of resistance R51 concatenation operation amplifiers U7D, put by the computing
The reverse input end of big device U7D connects earth signal GND by resistance R52, and the reverse input end of the operational amplifier U7D passes through
One end of resistance R46 connection resistance R42, the output end of the other end concatenation operation amplifier U7D of the resistance R42.
4. the electric-leakage detection circuit with anti-tampering function according to claim 1, it is characterised in that the power supply VCC is
5V。
5. the electric-leakage detection circuit with anti-tampering function according to claim 2, it is characterised in that the electric capacity C20 is
0.1uF, the electric capacity C17 are 0.01uF.
6. the electric-leakage detection circuit with anti-tampering function according to claim 3, it is characterised in that the electric capacity C18 is
2.2uF。
7. the electric-leakage detection circuit with anti-tampering function according to claim 1, it is characterised in that the electric capacity C21 is
2.2uF, the electric capacity C19, electric capacity C22 are 0.001uF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621438977.2U CN206281931U (en) | 2016-12-26 | 2016-12-26 | A kind of electric-leakage detection circuit with anti-tampering function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621438977.2U CN206281931U (en) | 2016-12-26 | 2016-12-26 | A kind of electric-leakage detection circuit with anti-tampering function |
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| Publication Number | Publication Date |
|---|---|
| CN206281931U true CN206281931U (en) | 2017-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621438977.2U Active CN206281931U (en) | 2016-12-26 | 2016-12-26 | A kind of electric-leakage detection circuit with anti-tampering function |
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| CN (1) | CN206281931U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107995752A (en) * | 2018-01-05 | 2018-05-04 | 江苏恒鹏电气集团有限公司 | It is a kind of to detect lamp stand principal current, leakage current, the detection device of water logging at the same time |
-
2016
- 2016-12-26 CN CN201621438977.2U patent/CN206281931U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107995752A (en) * | 2018-01-05 | 2018-05-04 | 江苏恒鹏电气集团有限公司 | It is a kind of to detect lamp stand principal current, leakage current, the detection device of water logging at the same time |
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