CN106814271A - Detection circuit for detecting high voltagehigh frequency interference - Google Patents
Detection circuit for detecting high voltagehigh frequency interference Download PDFInfo
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- CN106814271A CN106814271A CN201710069815.9A CN201710069815A CN106814271A CN 106814271 A CN106814271 A CN 106814271A CN 201710069815 A CN201710069815 A CN 201710069815A CN 106814271 A CN106814271 A CN 106814271A
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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
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
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Abstract
The invention provides a kind of detection circuit for detecting high voltagehigh frequency interference, belong to field of electrical equipment, the detection circuit includes antenna, and the reception frequency selection circuit being connected with antenna, High Amplifier Circuit is connected with the output end for receiving frequency selection circuit, there is final stage rectification circuit in the output end connection of High Amplifier Circuit, being connected with signal in the output end of final stage rectification circuit keeps output circuit.The signal for receiving is chosen by using frequency selection circuit is received, then makes the triode operation in High Amplifier Circuit in critical closure state, and constitute Darlington transistor composite mode, to improve the sensitivity for letting off journey high.So as to improve the detection circuit anti-interference of itself, the damage of circuit and failure will not occur because being attacked；Power consumption is reduced simultaneously, reduces the requirement to system power supply.
Description
Technical field
The invention belongs to field of electrical equipment, more particularly to for detecting the detection circuit that high voltagehigh frequency is disturbed.
Background technology
With electric power, the development of mechanics of communication, also continuing to bring out for various destruction communications services and electric-power metering facility is high
Pressure High-frequency Interference attacks the characteristics of having destructive big, disguised strong.It is subjected to the equipment of interference attack often in the shape of deadlock
State, loses the due function of equipment, and larger economic loss and negative effect is brought to society.Current communication and electric power sets
Apply, be in terms of performance requirement not anti-electrion this, also just give lawless person and broken, open it is convenient it
Door.The circuit can fast and effectively detect the interference attack behavior of high voltagehigh frequency.It is that protection communication and electric power facility play product
The effect of pole.
Existing high voltagehigh frequency detection circuit is mainly used for the trouble hunt ing of electrical equipment malfunction point, when high-tension circuit is deposited
In the case of electric discharge or electric leakage, electric discharge (failure) position can be searched with this circuit.Common practice is to use audio collection
Method.Specific method is to deliver to microprocessor after amplifying through signal using sound transducer to carry out the frequency-domain analysis of waveform, its
Energy distribution is in the bandwidth of 20~150kHz.The characteristics of the method is relatively easy hardware circuit, has only included sensor electricity
Road and signal amplification circuit.Its most signal analysis work transfers to microprocessor to complete, and its algorithm is complicated, and need compared with
The high speed microprocessor of resource high.This just considerably increases the cost and power consumption of circuit.Due to the algorithm of substantial amounts of use software,
Its aspect of performance is also a big weakness.Be easiest to go wrong when whole detecting system is attacked is exactly microprocessor,
What it was showed is exactly program fleet, is resetted, or even is crashed.When there is above-mentioned phenomenon, its detecting system is also just lost
Its due function.
The content of the invention
In order to solve shortcoming and defect present in prior art, the invention provides for improving anti-interference, reducing
The detection circuit of power supply requirement.
In order to reach above-mentioned technical purpose, the invention provides the detection circuit for detecting high voltagehigh frequency interference, it is special
Levy and be, the detection circuit, including：Antenna E1, and the reception frequency selection circuit being connected with antenna E1, are receiving frequency selection circuit
Output end be connected with High Amplifier Circuit, High Amplifier Circuit output end connection have final stage rectification circuit, in final stage rectification circuit
Output end be connected with signal keep output circuit；
Wherein, electric capacity C4, inductance L1 and the electric capacity C6 being connected with antenna E1 are provided with frequency selection circuit is received, in electric capacity
The two ends of C6 are parallel with inductance L2；The first parallel circuit including resistance R6 Yu resistance R3, Yi Jiyu are provided with High Amplifier Circuit
First parallel circuit the second parallel circuit including resistance R12 Yu R8 in parallel, is additionally provided with triode Q1, three in High Amplifier Circuit
Pole pipe Q2, triode Q5 and triode Q6, are provided with triode Q4 and triode Q7 in final stage rectification circuit.
Optionally, in the High Amplifier Circuit, resistance R14 is additionally provided with, one end of resistance R14 connects with one end of resistance R6
Connect, the other end of resistance R14 is connected with the emitter stage of triode Q1, the emitting stage of triode Q1 also connects with the ground level of triode Q2
Connect, the emitting stage of triode Q2 is connected with one end of resistance R14, the colelctor electrode of triode Q2 is connected with resistance R2.
Optionally, in the High Amplifier Circuit, electric capacity C7 is additionally provided with, one end of electric capacity C7 is connected with frequency selection circuit is received,
The other end of electric capacity C7 is connected with resistance R9.
Optionally, second parallel circuit is connected with resistance R9, and is connected to the triode on the second parallel circuit
Q6, is connected with the ground level of resistance R15 and triode Q5 on the emitting stage of triode Q6, the High Amplifier Circuit be additionally provided with
Triode Q6 colelctor electrodes, the resistance R11 of the colelctor electrode connection of triode Q5, resistance is connected with the colelctor electrode of triode Q6
R10。
Optionally, triode Q4 and triode Q7 is provided with the final stage rectification circuit, the base stage of triode Q4 is through electricity
Resistance R4 is connected with the colelctor electrode of triode Q1, and the colelctor electrode of triode Q4 is connected with the colelctor electrode of triode Q7；
Triode Q3 is additionally provided with final stage rectification circuit, the ground level of triode Q3 is connected with resistance R10, triode Q3's
Colelctor electrode is connected through resistance R13 with the ground level of triode Q7, and diode D2 is also associated with the colelctor electrode of triode Q7.
Optionally, in the signal output apparatus, be provided with the resistance R16 being connected with diode D2, and with resistance R16
Electric capacity C8, voltage-regulator diode D3 in parallel, is additionally provided with resistance R20 between electric capacity C8 and voltage-regulator diode D3.
Optionally, it is characterised in that also including earthed circuit, the earthed circuit includes electric capacity C14 and electric capacity in parallel
C17。
Optionally, also including 5V voltage input ends.
The beneficial effect brought of technical scheme that the present invention is provided is：
The signal for receiving is chosen by using frequency selection circuit is received, then makes the triode work in High Amplifier Circuit
Make in critical closure state, and constitute Darlington transistor composite mode, to improve the sensitivity for letting off journey high.So as to improve this
The anti-interference of circuit itself is detected, the damage of circuit and failure will not occur because being attacked；Simultaneously power is reduced to disappear
Consumption, reduces the requirement to system power supply.
Brief description of the drawings
In order to illustrate more clearly of technical scheme, embodiment will be described below needed for the accompanying drawing to be used
It is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, general for this area
For logical technical staff, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of structural representation for detecting the detection circuit of high voltagehigh frequency interference that the present invention is provided.
Specific embodiment
To make structure of the invention and advantage clearer, structure of the invention is made further below in conjunction with accompanying drawing
Description.
Embodiment one
The invention provides a kind of detection circuit for detecting high voltagehigh frequency interference, as shown in figure 1, the detection circuit bag
Include：Antenna E1, and the reception frequency selection circuit being connected with antenna E1, electric discharge high is connected with the output end for receiving frequency selection circuit
Road, has final stage rectification circuit in the output end connection of High Amplifier Circuit, and being connected with signal in the output end of final stage rectification circuit protects
Hold output circuit；
Wherein, electric capacity C4, inductance L1 and the electric capacity C6 being connected with antenna E1 are provided with frequency selection circuit is received, in electric capacity
The two ends of C6 are parallel with inductance L2；The first parallel circuit including resistance R6 Yu resistance R3, Yi Jiyu are provided with High Amplifier Circuit
First parallel circuit the second parallel circuit including resistance R12 Yu R8 in parallel, is additionally provided with triode Q1, three in High Amplifier Circuit
Pole pipe Q2, triode Q5 and triode Q6, are provided with triode Q4 and triode Q7 in final stage rectification circuit.
In force, the embodiment of the present invention proposes a kind of detection circuit, for being detected to high voltagehigh frequency interference, is
This detection is completed, the detection circuit includes that receiving short frequency circuit, High Amplifier Circuit, final stage rectification circuit and signal keeps defeated
Go out the part of circuit four.
Wherein, electric capacity C4, inductance L1 and the electric capacity C6 being connected with antenna E1 are provided with frequency selection circuit is received, in electric capacity
The two ends of C6 are parallel with inductance L2.According to above-mentioned original paper, the high voltagehigh frequency interference signal received through antenna E1 enters by inductance
L1, inductance L2, electric capacity C4, the frequency-selective network of electric capacity C6 compositions.Because electrion is that occur with impulse form, its signal is included
Abundant harmonic components, the bandwidth of signal is very wide.For the antijamming capability for improving detection circuit avoids wireless and mobile device
Interference adds two stage filter circuit, is respectively C4, the band logical in parallel filter of the series connection bandpass filtering and L2, C6 composition of L1 compositions
Ripple.
High Amplifier Circuit is connected with the output end for receiving frequency selection circuit.In High Amplifier Circuit, except being provided with including resistance R6
With first parallel circuit of resistance R3, and second parallel circuit including resistance R12 Yu R8 in parallel with the first parallel circuit,
Triode Q1, triode Q2, triode Q5 and triode Q6 are additionally provided with High Amplifier Circuit, three are provided with final stage rectification circuit
Pole pipe Q4 and triode Q7.Resistance R14 is additionally provided with, one end of resistance R14 is connected with one end of resistance R6, and resistance R14's is another
End is connected with the emitter stage of triode Q1, and the ground level of the emitting stage of triode Q1 also with triode Q2 is connected, the hair of triode Q2
Penetrate level to be connected with one end of resistance R14, the colelctor electrode of triode Q2 is connected with resistance R2.
In addition, in High Amplifier Circuit, being additionally provided with electric capacity C7, one end of electric capacity C7 is connected with frequency selection circuit is received, electric capacity C7
The other end be connected with resistance R9.Second parallel circuit is connected with resistance R9, and is connected to three poles on the second parallel circuit
Pipe Q6, is connected with the ground level of resistance R15 and triode Q5 on the emitting stage of triode Q6, is additionally provided with and three in High Amplifier Circuit
Pole pipe Q6 colelctor electrodes, the resistance R11 of the colelctor electrode connection of triode Q5, are connected with resistance R10 on the colelctor electrode of triode Q6.
High Amplifier Circuit based on said structure, High Amplifier Circuit is provided without frequency-selective network, for the power consumption for reducing detection circuit is high
Put part and be operated in Class B state.Here Class B state is that the ideal efficiency according to amplifier under different working condition is carried out
Divide, specifically, the angle of flow φ that Class B state refers to amplifier is 90 °, ideal efficiency η is 78.5% state.
Resistance R6, resistance R3 in High Amplifier Circuit constitute circuit forward direction quiescent bias circuit, it is ensured that triode Q1, Q2 group
Into High Amplifier Circuit static state be in critical closure state；Same resistance R8, resistance R12 are the reverse quiescent biasing resistance of circuit,
To ensure that triode Q5, Q6 are static in critical closure state.To improve the sensitivity that height puts level, circuit employs Darlington transistor
Composite mode.Resistance R14, R15 are bleeder resistance, and its effect is to bypass the electric leakage that triode Q1, Q6 are produced by thermal noise
Stream, the operating point of stabilization triode Q2, Q5.Resistance R2, R11 are the load resistance of High Amplifier Circuit colelctor electrode output.Electric capacity C5, C7
It is the blocking coupled capacitor for putting input high, resistance R5, R9 are input current-limiting resistance, it is ensured that the safety of High Amplifier Circuit.
Optionally, triode Q4 and triode Q7 is provided with final stage rectification circuit, the base stage of triode Q4 is through resistance R4
Colelctor electrode with triode Q1 is connected, and the colelctor electrode of triode Q4 is connected with the colelctor electrode of triode Q7；In final stage rectification circuit
In be additionally provided with triode Q3, the ground level of triode Q3 is connected with resistance R10, and the colelctor electrode of triode Q3 is through resistance R13 and three poles
The ground level of pipe Q7 is connected, and diode D2 is also associated with the colelctor electrode of triode Q7.
In force, final stage output circuit is by being provided with triode Q4, Q7 to improve fan-out capability.Triode Q3 is anti-phase
Circuit, it is ensured that the uniformity of output phase.Resistance R4, R10 are input into current-limiting resistance as final stage, it is ensured that the reliability of final stage.Separately
The outer signal for why making triode Q4, Q7 export is exported after merging after diode D2, and the role of diode D2 is anti-
Only the leakage current of final stage is impacted to output.
Optionally, in signal output apparatus, the resistance R16 being connected with diode D2 is provided with, and it is in parallel with resistance R16
Electric capacity C8, voltage-regulator diode D3, resistance R20 is additionally provided between electric capacity C8 and voltage-regulator diode D3.
In force, signal holding circuit is mainly made up of C8 and R16.It is true because high-voltage discharging signal pulsewidth is very narrow
To protect subsequent conditioning circuit can reliably capture the signal, therefore increased C8 and keep the output of signal.Electrion is attacked after terminating
C8 then discharges electric charge by R16, and output resets.The power supply of 5V is used due to whole discharge detection circuit, then
Level is then 3.3V systems, is to match to increased by R20, the clamp circuit of D3 compositions with late-class circuit.
Optionally, earthed circuit is also included in the detection circuit, earthed circuit includes electric capacity C14 and electric capacity in parallel
C17.For realizing isolating over the ground.Also include 5V voltage input ends in the detection circuit.For to the unit in whole detection circuit
Device is powered.
In addition, detection circuit voltage proposed by the present invention is 5V, because circuit works in Class B state, quiescent dissipation
It is microampere order, when electrion attack is detected, its operating current is again smaller than 5mA.Therefore requirement of the circuit to power supply is very low,
Practical conventional power supply.
The invention provides a kind of detection circuit for detecting high voltagehigh frequency interference, the detection circuit includes antenna, with
And the reception frequency selection circuit being connected with antenna, High Amplifier Circuit is connected with the output end for receiving frequency selection circuit, in High Amplifier Circuit
Output end connection has final stage rectification circuit, and being connected with signal in the output end of final stage rectification circuit keeps output circuit.Pass through
The signal for receiving is chosen using frequency selection circuit is received, then makes the triode operation in High Amplifier Circuit in critical closure
State, and Darlington transistor composite mode is constituted, to improve the sensitivity for letting off journey high.So as to improve the detection circuit itself
Anti-interference, the damage of circuit and failure will not occur because being attacked；Power consumption is reduced simultaneously, is reduced to system
The requirement of power supply.
Each sequence number in above-described embodiment is for illustration only, and the elder generation during the assembling or use of each part is not represented
Afterwards sequentially.
Embodiments of the invention are the foregoing is only, is not intended to limit the invention, it is all in the spirit and principles in the present invention
Within, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (8)
1. it is used to detect the detection circuit of high voltagehigh frequency interference, it is characterised in that the detection circuit, including：Antenna E1, and
The reception frequency selection circuit being connected with antenna E1, is connected with High Amplifier Circuit, in High Amplifier Circuit in the output end for receiving frequency selection circuit
Output end connection has final stage rectification circuit, and being connected with signal in the output end of final stage rectification circuit keeps output circuit；
Wherein, electric capacity C4, inductance L1 and the electric capacity C6 being connected with antenna E1 are provided with frequency selection circuit is received, electric capacity C6's
Two ends are parallel with inductance L2；It is provided with the first parallel circuit including resistance R6 Yu resistance R3 in High Amplifier Circuit, and with first
Parallel circuit the second parallel circuit including resistance R12 Yu R8 in parallel, is additionally provided with triode Q1, triode in High Amplifier Circuit
Q2, triode Q5 and triode Q6, are provided with triode Q4 and triode Q7 in final stage rectification circuit.
2. it is according to claim 1 for detecting the detection circuit that high voltagehigh frequency is disturbed, it is characterised in that to be put in the height
In circuit, resistance R14 is additionally provided with, one end of resistance R14 is connected with one end of resistance R6, the other end and triode of resistance R14
The emitter stage connection of Q1, the ground level of the emitting stage of triode Q1 also with triode Q2 is connected, the emitting stage and resistance of triode Q2
One end connection of R14, the colelctor electrode of triode Q2 is connected with resistance R2.
3. it is according to claim 2 for detecting the detection circuit that high voltagehigh frequency is disturbed, it is characterised in that to be put in the height
In circuit, electric capacity C7 is additionally provided with, one end of electric capacity C7 is connected with frequency selection circuit is received, and the other end of electric capacity C7 is connected with resistance
R9。
4. it is according to claim 3 for detecting the detection circuit that high voltagehigh frequency is disturbed, it is characterised in that described second simultaneously
Connection circuit is connected with resistance R9, and is connected to the triode Q6 on the second parallel circuit, connects on the emitting stage of triode Q6
The ground level of resistance R15 and triode Q5 is connected to, is additionally provided with and triode Q6 colelctor electrodes, triode Q5 in the High Amplifier Circuit
The resistance R11 of colelctor electrode connection, is connected with resistance R10 on the colelctor electrode of triode Q6.
5. it is according to claim 4 for detecting the detection circuit that high voltagehigh frequency is disturbed, it is characterised in that in the final stage
Be provided with triode Q4 and triode Q7 in rectification circuit, the base stage of triode Q4 through resistance R4 and triode Q1 colelctor electrode phase
Even, the colelctor electrode of triode Q4 is connected with the colelctor electrode of triode Q7；
Triode Q3 is additionally provided with final stage rectification circuit, the ground level of triode Q3 is connected with resistance R10, the current collection of triode Q3
Pole is connected through resistance R13 with the ground level of triode Q7, and diode D2 is also associated with the colelctor electrode of triode Q7.
6. it is according to claim 5 for detecting the detection circuit that high voltagehigh frequency is disturbed, it is characterised in that in the signal
In output circuit, the resistance R16 being connected with diode D2, and electric capacity C8, the voltage-regulator diode in parallel with resistance R16 are provided with
D3, is additionally provided with resistance R20 between electric capacity C8 and voltage-regulator diode D3.
7. according to any one of claim 1 to 6 for detect high voltagehigh frequency interference detection circuit, it is characterised in that
Also include earthed circuit, the earthed circuit includes electric capacity C14 and electric capacity C17 in parallel.
8. it is according to claim 7 for detecting the detection circuit that high voltagehigh frequency is disturbed, it is characterised in that also including 5V electricity
Pressure input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710069815.9A CN106814271A (en) | 2017-02-08 | 2017-02-08 | Detection circuit for detecting high voltagehigh frequency interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710069815.9A CN106814271A (en) | 2017-02-08 | 2017-02-08 | Detection circuit for detecting high voltagehigh frequency interference |
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| Publication Number | Publication Date |
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| CN106814271A true CN106814271A (en) | 2017-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710069815.9A Pending CN106814271A (en) | 2017-02-08 | 2017-02-08 | Detection circuit for detecting high voltagehigh frequency interference |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280673A (en) * | 2014-09-17 | 2015-01-14 | 杭州普安科技有限公司 | Detecting circuit for 35kV high voltage discharging |
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2017
- 2017-02-08 CN CN201710069815.9A patent/CN106814271A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280673A (en) * | 2014-09-17 | 2015-01-14 | 杭州普安科技有限公司 | Detecting circuit for 35kV high voltage discharging |
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Application publication date: 20170609 |
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