CN108074362A - The amplifying circuit of detectable signal in transformer anti-theft system - Google Patents
The amplifying circuit of detectable signal in transformer anti-theft system Download PDFInfo
- Publication number
- CN108074362A CN108074362A CN201610994472.2A CN201610994472A CN108074362A CN 108074362 A CN108074362 A CN 108074362A CN 201610994472 A CN201610994472 A CN 201610994472A CN 108074362 A CN108074362 A CN 108074362A
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- Prior art keywords
- amplifier
- resistance
- capacitance
- circuit
- amplification module
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- 230000003321 amplification Effects 0.000 claims abstract description 29
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 29
- 239000011324 bead Substances 0.000 claims description 21
- 230000005611 electricity Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
- G08B13/19—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infrared-radiation detection systems
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
- G08B29/18—Prevention or correction of operating errors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/68—Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Security & Cryptography (AREA)
- Burglar Alarm Systems (AREA)
Abstract
The invention discloses the amplifying circuits of detectable signal in transformer anti-theft system, including primary signal amplification module, secondary signal amplification module and signal output circuit, wherein, primary signal amplification module includes amplifier one, secondary signal amplification module includes amplifier two, adjustable resistance two, resistance three, resistance four and capacitance seven, seven both ends of capacitance are connected respectively with one output terminal of amplifier and two in-phase input end of amplifier, two both ends of adjustable resistance are connected respectively with two inverting input of amplifier and output terminal, three one end of resistance is connected on the circuit between two inverting input of amplifier and adjustable resistance two, its other end is grounded, four both ends of resistance are connected respectively with two output terminal of amplifier and signal output circuit.Amplify during present invention application by two-stage, be avoided that weak output signal caused by decaying and cannot intuitively show, and then can guarantee that transformer anti-theft system is effectively run.
Description
Technical field
The present invention relates to transformer anti-theft technology, the amplifying circuit of detectable signal specifically in transformer anti-theft system.
Background technology
In recent years, the phenomenon that electric power facility is stolen occurs often, this not only threatens the safe operation of power grid, also serious shadow
Industrial and agricultural production and the household electricity of the people are rung.In order to ensure the reliability service of power grid, electric power facility itself is improved
Anti-theft performance reduces electric power facility and is stolen event to greatest extent, this becomes current people's question of common concern.
It is higher transformer integrally to be stolen or stolen in electric power facility theft the ratio of copper core in transformer, therefore, is solved
The problem of transformer is stolen is as the important step that electric power facility is prevented to be stolen.Frequently with infrared sensing during transformer anti-theft
Device makes corresponding judgement by control system to detect the infrared signal that human body radiation goes out according to the signal detected, control
If system confirmation processed, which has, indicates that joint defence personnel rush towards scene and criminal is admonished during criminal's intervention, and then prevents not
Method molecule steals transformer.The weak output signal that sensor detects when transformer anti-theft monitoring system is applied, signal are being transmitted across
Cheng Zhonghui occurs attenuation and absorbs, and digital display circuit can not accurately reflect the signal detected, this has seriously affected transformation
Effective progress of device anti-theft monitoring system.
The content of the invention
Sensor detection signal can be put it is an object of the invention to overcome the deficiencies of the prior art and provide a kind of
Greatly, intuitively to show the amplifying circuit of detectable signal in the transformer anti-theft system of detectable signal.
The present invention, which solves the above problems, to be achieved through the following technical solutions：Detectable signal in transformer anti-theft system
Amplifying circuit, including primary signal amplification module, secondary signal amplification module and signal output circuit, the primary signal amplification
Module include amplifier one, the secondary signal amplification module include amplifier two, adjustable resistance two, resistance three, resistance four and
Capacitance seven, seven both ends of capacitance are connected respectively with one output terminal of amplifier and two in-phase input end of amplifier, adjustable resistance two
Both ends are connected respectively with two inverting input of amplifier and output terminal, three one end of resistance be connected to two inverting input of amplifier with
On circuit between adjustable resistance two, the other end ground connection, four both ends of resistance respectively with two output terminal of amplifier and signal
Outlet line connects.The present invention in application, the signal that detects of sensor by amplifier one in-phase input end and anti-phase input
End input, after amplifier one carries out primary amplification, by signal output after amplifying again using secondary signal amplification module
Circuit output.
Because AD620 is the difference special instrument amplifier that is integrated by three accurate amplifiers, with low offset, high-gain, height
The characteristics of conjugated analoging systeming ratio, further, the amplifier one, use AD620 chips.
Further, the primary signal amplification module further includes adjustable resistance one, the both ends of adjustable resistance one respectively with
First pin of amplifier one and the connection of the 8th pin.
Power end noise coupling enters in amplifier one in order to prevent, and further, the primary signal amplification module is also
Including magnetic bead one, magnetic bead two, capacitance three, capacitance four, capacitance five and capacitance six, one both ends of magnetic bead connect positive pole respectively
With the 7th pin of amplifier one, the capacitance three and the parallel branch one end in parallel formed of capacitance four are connected to magnetic bead one with putting
On circuit between big device one, other end ground connection；Two both ends of magnetic bead connect the of power cathode and amplifier one respectively
Four pins, the capacitance five and the parallel branch one end in parallel formed of capacitance six are connected to the line between magnetic bead two and amplifier one
On the road, the other end is grounded.In this way, being connected to ground two capacitances to one each energization pins of amplifier during the present invention, and lead to
It crosses a magnetic bead series connection and carries out power decoupling.
Further, in transformer anti-theft system detectable signal amplifying circuit, further include resistance five, described resistance May Day
End is connected to output line road, other end external power supply.
Because OP777 chips are the low-noise operational amplifiers of a ultraprecise, deviated with extremely low voltage and current and very high
Gain stability, further, the amplifier two uses OP777 chips.
Further, the primary signal amplification module further includes capacitance one, capacitance two, resistance one and resistance two, described
One one end of capacitance is connected with the inverting input of amplifier one, and two one end of capacitance is connected with the in-phase input end of amplifier one, electricity
Both one end is grounded for resistance one and resistance two, and resistance one is connected to capacitance one with respect to the other end of its ground terminal and amplifier one is anti-
On circuit between phase input terminal, resistance two is connected to capacitance two and one homophase input of amplifier with respect to the other end of its ground terminal
On circuit between end.In this way, AC coupled input, capacitance one and electricity are carried out by capacitance one and capacitance two during present invention application
One composition high-pass filter of resistance, capacitance two form high-pass filter with resistance two, and the present invention passes through capacitance one, capacitance two, resistance
One and the high-pass filter that forms of resistance two to reduce the low-frequency disturbance in environment.
In conclusion the invention has the advantages that：Overall structure of the present invention is simple, is easy to implement, and the present invention should
Used time sensor detection signal is inputted and is amplified by amplifier one, then is inputted secondary signal amplification module and put again
Greatly, sensor detection signal can guarantee that digital display circuit accurately reflects detectable signal after two-stage is amplified, in this way, can guarantee
Transformer anti-theft monitoring system is effectively run.
Description of the drawings
The structure diagram of Fig. 1 one specific embodiment of the present invention.
It is entitled corresponding to reference numeral in attached drawing：R1, resistance one, R2, resistance two, R3, resistance three, R4, resistance four,
R5, resistance five, RW1, adjustable resistance one, RW2, adjustable resistance two, C1, capacitance one, C2, capacitance two, C3, capacitance three, C4, capacitance
Four, C5, capacitance five, C6, capacitance six, C7, capacitance seven, A1, amplifier one, A2, amplifier two, L1, magnetic bead one, L2, magnetic bead two.
Specific embodiment
With reference to embodiment and attached drawing, detailed description further, but embodiments of the present invention are done to the present invention
It is without being limited thereto.
Embodiment：
As shown in Figure 1, in transformer anti-theft system detectable signal amplifying circuit, including primary signal amplification module, secondary letter
Number amplification module and signal output circuit, wherein, primary signal amplification module includes one A1 of amplifier, one C1 of capacitance, capacitance two
C2, three C3 of capacitance, four C4 of capacitance, five C5 of capacitance, six C6 of capacitance, one R1 of resistance, two R2 of resistance, one L1 of magnetic bead, two L2 of magnetic bead and
One RW1 of adjustable resistance, one A1 of amplifier of the present embodiment using AD620 chips, the both ends of one RW1 of adjustable resistance respectively with amplification
The first pin of one A1 of device and the connection of the 8th pin, one C1 one end of capacitance are connected with the inverting input of one A1 of amplifier, capacitance
Two C2 one end are connected with the in-phase input end of one A1 of amplifier, and both one end is grounded by one R1 of resistance and two R2 of resistance, resistance one
R1 is connected to respect to the other end of its ground terminal on the circuit between one A1 inverting inputs of one C1 of capacitance and amplifier, resistance two
R2 is connected to respect to the other end of its ground terminal on the circuit between one A1 in-phase input ends of two C2 of capacitance and amplifier.Magnetic bead one
L1 both ends connect the 7th pin of one A1 of positive pole and amplifier, three C3 of capacitance and four C4 of the capacitance parallel connections in parallel formed respectively
Branch one end is connected on the circuit between one A1 of one L1 of magnetic bead and amplifier, other end ground connection.Distinguish at two L2 both ends of magnetic bead
The 4th pin of one A1 of power cathode and amplifier is connected, five C5 of capacitance and six C6 of capacitance parallel branch one end in parallel formed connect
It is connected on the circuit between one A1 of two L2 of magnetic bead and amplifier, other end ground connection.
The secondary signal amplification module of the present embodiment includes two A2 of amplifier, two RW2 of adjustable resistance, three R3 of resistance, resistance
Seven C7 of four R4 and capacitance, wherein, two A2 of amplifier also uses OP777 chips, and two A2 energization pins external power supplys of amplifier are positive and negative
Pole, seven C7 both ends of capacitance are connected respectively with one A1 output terminals of amplifier and two A2 in-phase input ends of amplifier, two RW2 of adjustable resistance
Both ends are connected respectively with two A2 inverting inputs of amplifier and output terminal, and it is defeated that three R3 one end of resistance is connected to two A2 reverse phases of amplifier
Enter on the circuit between two RW2 of end and adjustable resistance, other end ground connection, four R4 both ends of resistance export respectively with two A2 of amplifier
End is connected with signal output circuit.The present embodiment further includes five R5 of resistance, and five R5 one end of resistance is connected to output line road,
Its other end external power supply.In specific application, one A1 of amplifier and two A2's the present embodiment of amplifier are powered using 5V power supplys.
The resistance value of two R2 of one R1 of resistance and resistance is 24.7K Ω in the present embodiment, and the resistance value of three R3 of resistance is 10 K Ω,
The resistance value of five R5 of four R4 of resistance and resistance is 20 K Ω, and the resistance value adjustable extent of one RW1 of adjustable resistance is 0~50 K Ω, can
The resistance value adjustable extent of two RW2 of resistance is adjusted as 0~200 K Ω, one C1 of capacitance, two C2 of capacitance, three C3 of capacitance, electricity of the present embodiment
The capacitance for holding seven C7 of six C6 and capacitance is 0.1 μ F, four C4 of capacitance and five C5 of capacitance both using polarized tantalum capacitance, the two
Capacitance is 10 μ F.
The present embodiment is in application, the signal that sensor detects connects amplifier one by one C1 of capacitance and two C2 of capacitance is opposite
The other end input at A1 ends, is filtered out by one C1 of capacitance, two C2 of capacitance, one R1 of resistance and two R2 of the resistance high-pass filtering circuit formed
Low-frequency disturbance, by adjust the resistance value of one RW1 of adjustable resistance come to primary amplification gain be adjusted, and pass through adjust it is adjustable
The resistance value of two RW2 of resistance is adjusted come the gain to secondary amplification, carries out secondary amplified signal and is inputted by amplified signal
Circuit output.
As described above, it can preferably realize the present invention.
Claims (7)
1. the amplifying circuit of detectable signal in transformer anti-theft system, which is characterized in that including primary signal amplification module, secondary
Signal amplification module and signal output circuit, the primary signal amplification module include amplifier one（A1）, the secondary signal
Amplification module includes amplifier two（A2）, adjustable resistance two（RW2）, resistance three（R3）, resistance four（R4）And capacitance seven（C7）, institute
State capacitance seven（C7）Both ends respectively with amplifier one（A1）Output terminal and amplifier two（A2）In-phase input end connects, adjustable resistance
Two（RW2）Both ends respectively with amplifier two（A2）Inverting input is connected with output terminal, resistance three（R3）One end is connected to amplification
Device two（A2）Inverting input and adjustable resistance two（RW2）Between circuit on, the other end ground connection, the resistance four（R4）Two
End respectively with amplifier two（A2）Output terminal is connected with signal output circuit.
2. the amplifying circuit of detectable signal in transformer anti-theft system according to claim 1, which is characterized in that described to put
Big device one（A1）Using AD620 chips.
3. the amplifying circuit of detectable signal in transformer anti-theft system according to claim 2, which is characterized in that described first
Grade signal amplification module further includes adjustable resistance one（RW1）, adjustable resistance one（RW1）Both ends respectively with amplifier one（A1）'s
First pin and the connection of the 8th pin.
4. the amplifying circuit of detectable signal in transformer anti-theft system according to claim 2, which is characterized in that described first
Grade signal amplification module further includes magnetic bead one（L1）, magnetic bead two（L2）, capacitance three（C3）, capacitance four（C4）, capacitance five（C5）And
Capacitance six（C6）, the magnetic bead one（L1）Both ends connect positive pole and amplifier one respectively（A1）The 7th pin, the electricity
Hold three（C3）With capacitance four（C4）Parallel branch one end that parallel connection is formed is connected to magnetic bead one（L1）With amplifier one（A1）Between
Circuit on, the other end ground connection；The magnetic bead two（L2）Both ends connect power cathode and amplifier one respectively（A1）The 4th
Pin, the capacitance five（C5）With capacitance six（C6）Parallel branch one end that parallel connection is formed is connected to magnetic bead two（L2）With amplifier
One（A1）Between circuit on, the other end ground connection.
5. the amplifying circuit of detectable signal in transformer anti-theft system according to claim 1, which is characterized in that further include
Resistance five（R5）, the resistance five（R5）One end is connected to output line road, other end external power supply.
6. the amplifying circuit of detectable signal in transformer anti-theft system according to claim 1, which is characterized in that described to put
Big device two（A2）Using OP777 chips.
7. the amplifying circuit of detectable signal in the transformer anti-theft system according to any one in claim 1~6, special
Sign is that the primary signal amplification module further includes capacitance one（C1）, capacitance two（C2）, resistance one（R1）And resistance two
（R2）, the capacitance one（C1）One end and amplifier one（A1）Inverting input connection, capacitance two（C2）One end and amplifier
One（A1）In-phase input end connection, resistance one（R1）With resistance two（R2）Both one end is grounded, resistance one（R1）With respect to it
The other end of ground terminal is connected to capacitance one（C1）With amplifier one（A1）On circuit between inverting input, resistance two（R2）
The other end with respect to its ground terminal is connected to capacitance two（C2）With amplifier one（A1）On circuit between in-phase input end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610994472.2A CN108074362A (en) | 2016-11-11 | 2016-11-11 | The amplifying circuit of detectable signal in transformer anti-theft system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610994472.2A CN108074362A (en) | 2016-11-11 | 2016-11-11 | The amplifying circuit of detectable signal in transformer anti-theft system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108074362A true CN108074362A (en) | 2018-05-25 |
Family
ID=62153591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610994472.2A Withdrawn CN108074362A (en) | 2016-11-11 | 2016-11-11 | The amplifying circuit of detectable signal in transformer anti-theft system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108074362A (en) |
-
2016
- 2016-11-11 CN CN201610994472.2A patent/CN108074362A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180525 |