CN108111130A - A kind of amplifying circuit for infrared detection system - Google Patents
A kind of amplifying circuit for infrared detection system Download PDFInfo
- Publication number
- CN108111130A CN108111130A CN201711475379.1A CN201711475379A CN108111130A CN 108111130 A CN108111130 A CN 108111130A CN 201711475379 A CN201711475379 A CN 201711475379A CN 108111130 A CN108111130 A CN 108111130A
- Authority
- CN
- China
- Prior art keywords
- resistance
- operational amplifier
- capacitance
- resistor
- variable resistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 11
- 230000003321 amplification Effects 0.000 claims abstract description 16
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 16
- 238000001914 filtration Methods 0.000 claims abstract description 13
- 230000005611 electricity Effects 0.000 claims description 11
- 230000009466 transformation Effects 0.000 claims description 2
- 230000005855 radiation Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 235000019504 cigarettes Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001141 propulsive effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/26—Modifications of amplifiers to reduce influence of noise generated by amplifying elements
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/04—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only
- H03F3/08—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only controlled by light
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The invention discloses a kind of amplifying circuits for infrared detection system, including power supply, pre-amplification circuit and filtering and amplifying circuit, the pre-amplification circuit includes first resistor, second resistance, 3rd resistor, 4th resistance, first capacitance, first variable resistor and the first operational amplifier, the filtering and amplifying circuit includes the 5th resistance, 6th resistance, 7th resistance, 8th resistance, 9th resistance, tenth resistance, 11st resistance, the second adjustable resistance, 3rd variable resistor, second capacitance, 3rd capacitance, 4th capacitance, 5th capacitance, second operational amplifier, 3rd operational amplifier and four-operational amplifier, using pre-amplification circuit and filtering and amplifying circuit, noise can effectively be inhibited, ensure the complete of signal, and it also avoids signal serious distortion or is submerged in noise.
Description
Technical field
The present invention relates to amplifying circuits, more particularly to a kind of amplifying circuit for infrared detection system.
Background technology
Infrared warning system is the warning system based on infrared acquisition principle, and significant fire is generated in transmitting to attack guided missile
Flame can be found and be alerted by alarm device, can also be detected and alert in flight course.
Not only body is heated by self-propelled system during flight, but also the plumage cigarette that when missile propulsive plant is burnt generates is backward
It is ejected into air, the temperature of body and plumage cigarette generates far above environment temperature and outwards substantial amounts of infra-red radiation, in addition also has
Aerodynamic Heating radiates.Aerodynamic Heating radiation is high-speed moving object covering caused by air-flow viscosity and air are heated up by compression.
In MISSILE LAUNCHING and burning phase, the combustion gas stream radiation signal of engine discharge is most strong, and closing engine in guided missile enters
Coast period, then based on Aerodynamic Heating radiation signal.
It can be divided into middle infrared warning, far infrared alarm and the compound alarm of multiband by the detecting band of warning system, by
It is very faint in the signal of existing middle infrared warning device output, in order to reach the requirement of the output amplitude of filtering and acquisition, it is necessary to
Signal is amplified processing, the design of the amplifying circuit of centering infrared warning is substantially carried out in this programme.
The content of the invention
For above-mentioned existing issue, the technical problem to be solved in the present invention, which is to provide, can ensure that signal is undistorted, and
And it can effectively inhibit noise and ensure a kind of complete amplifying circuit for infrared detection system of signal.
The present invention provides a kind of amplifying circuit for infrared detection system, including power supply, pre-amplification circuit and amplification
Filter circuit, the pre-amplification circuit include first resistor, second resistance, 3rd resistor, the 4th resistance, the first capacitance, the
One variable resistor and the first operational amplifier, the filtering and amplifying circuit include the 5th resistance, the 6th resistance, the 7th resistance, the
Eight resistance, the 9th resistance, the tenth resistance, the 11st resistance, the second adjustable resistance, the 3rd variable resistor, the second capacitance, the 3rd electricity
Appearance, the 4th capacitance, the 5th capacitance, second operational amplifier, the 3rd operational amplifier and four-operational amplifier, first electricity
Inverting input of the second end of the first end of resistance and the second resistance with the first operational amplifier is connected, second electricity
The first end of resistance is connected as signal input part, first variable resistor with the first end of the 3rd resistor, and the described 3rd
The first end of the second end of resistance, the first end of the first capacitance and the 4th resistance is defeated with the positive of first operational amplifier
Enter end to be connected, the second end of first capacitance and the equal signal ground of second end of the 4th resistance, the second of the first resistor
Output terminal of the first end of end and the 7th resistance with the first operational amplifier is connected, the second end and the 5th resistance of the 7th resistance
First end be connected with the inverting input of second operational amplifier, the first end of the second adjustable resistance and the 8th resistance
It is connected, the first end of the second end of the 8th resistance, the first end of the second capacitance and the 11st resistance is put with the second computing
The normal phase input end of big device is connected, the second end of second capacitance and the second end signal ground of the 11st resistance, and described the
Output terminal of the normal phase input end of the second end of five resistance and the 3rd operational amplifier with the second operational amplifier is connected,
The first end signal ground of 6th resistance, the second end of the 6th resistance, the first end of the 5th capacitance and the 3rd are variable
Inverting input of the first end of resistance with the 3rd operational amplifier is connected, the output of the 3rd operational amplifier
The first end of end, the second end of the second end of the 3rd variable resistor and the 5th capacitance with the 3rd capacitance is connected, and described the
First end of the second end of three capacitances respectively with the first end of the 9th resistance and the 4th capacitance is connected, the 9th resistance
Signal output part of the second end respectively with the inverting input of four-operational amplifier and four-operational amplifier is connected, and described
Normal phase input end of the second end of four capacitances respectively with the first end of the tenth resistance and four-operational amplifier is connected, described
The second end signal ground of tenth resistance, the anode of the power supply are put respectively with the positive terminal of the first variable resistor, the first computing
The big power positive end of device, the positive terminal of the second adjustable resistance, the power positive end of second operational amplifier, the 3rd operation amplifier
The power positive end of device and the power positive end of four-operational amplifier are connected, and the cathode of the power supply respectively can power transformation with first
The negative pole end of resistance, the power cathode end of the first operational amplifier, the negative pole end of the second adjustable resistance, the electricity of second operational amplifier
Source negative pole end, the power cathode end of the 3rd operational amplifier are connected with the power cathode end of four-operational amplifier.
The beneficial effects of the present invention are：
The present invention is a kind of amplifying circuit for infrared detection system, is filtered by using pre-amplification circuit and amplification
Circuit, it is undistorted so as to which signal be effectively ensured, but also can effectively inhibit noise, ensure the complete of signal, while also avoid
Signal serious distortion is submerged in noise.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only the preferred embodiment of the present invention, for
For those of ordinary skill in the art, without having to pay creative labor, it can also be obtained according to these attached drawings
His attached drawing.
Fig. 1 is a kind of circuit diagram of amplifying circuit for infrared detection system of the invention；
Fig. 2 is a kind of schematic diagram of amplifying circuit for infrared detection system of the invention.
Specific embodiment
In order to be best understood from the technology of the present invention content, specific embodiment is provided below, and with reference to attached drawing the present invention is done into
The explanation of one step.
Referring to Fig. 1 and Fig. 2, the present invention provides a kind of amplifying circuit for infrared detection system, including power supply VCC, preceding
Amplifying circuit and filtering and amplifying circuit are put, the pre-amplification circuit includes first resistor R1, second resistance R2,3rd resistor
R3, the 4th resistance R4, the first capacitance C1, the first variable resistor Rp1 and the first operational amplifier A 1, the filtering and amplifying circuit bag
Include the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, the 11st electricity
Hinder R11, the second adjustable resistance Rp2, the 3rd variable resistor Rp3, the second capacitance C2, the 3rd capacitance C3, the 4th capacitance C4, the 5th electricity
Appearance C5, second operational amplifier A2, the 3rd operational amplifier A 3, four-operational amplifier A4, the first of the first resistor R1
Inverting input of the second end of end and the second resistance R2 with the first operational amplifier A 1 is connected, the second resistance R2
First end as signal input part Vin, the signal input part Vin can receive infrared signal, first variable resistor
Rp1 is connected with the first end of the 5th resistance R5, the second end of the 5th resistance R5, the first end of the first capacitance C1 and
Normal phase input end of the first end of seven resistance R7 with first operational amplifier A 1 is connected, and the second of the first capacitance C1
End and the equal signal ground of second end of the 7th resistance R7, the second end of the first resistor R1 and the first end of the 4th resistance R4 are equal
It is connected with the output terminal of the first operational amplifier A 1, the second end of the 4th resistance R4 and the first end of 3rd resistor R3 are with second
The inverting input of operational amplifier A 2 is connected, and the second adjustable resistance Rp2 is connected with the first end of the 8th resistance R8, described
The first end of the second end of 8th resistance R8, the first end of the second capacitance C2 and the 11st resistance R11 with the second operation amplifier
The normal phase input end of device A2 is connected, the second end of the second capacitance C2 and the second end signal ground of the 11st resistance R11, institute
The second end of 3rd resistor R3 and the normal phase input end of the 3rd operational amplifier A 3 are stated with the second operational amplifier A2's
Output terminal is connected, the first end signal ground of the 6th resistance R6, the second end of the 6th resistance R6, the 5th capacitance C5
The inverting input of first end and the first end of the 3rd variable resistor Rp3 with the 3rd operational amplifier A 3 is connected, described
The second end of the output terminal of 3rd operational amplifier A 3, the second end of the 3rd variable resistor Rp3 and the 5th capacitance C5 with it is described
The first end of 3rd capacitance C3 is connected, the second end of the 3rd capacitance C3 respectively with the first end of the 9th resistance R9 and
The first end of four capacitance C4 is connected, the second end of the 9th resistance R9 inverting input with four-operational amplifier A4 respectively
It is connected with the signal output part Vout of four-operational amplifier A4, the signal output part Vout can be by amplification and filtered letter
Number being transmitted to subsequent data processing circuit is handled, the second end of the 4th capacitance C4 respectively with the described tenth electricity
The first end of resistance R10 is connected with the normal phase input end of four-operational amplifier A4, and the second end signal of the tenth resistance R10 connects
Ground, the anode of the power supply VCC respectively with the positive terminal of the first variable resistor Rp1, the first operational amplifier A 1 power supply VCC just
Extremely, the positive terminal of the second adjustable resistance Rp2, the power supply VCC positive terminals of second operational amplifier A2, the 3rd operational amplifier A 3
Power supply VCC positive terminals and the power supply VCC positive terminals of four-operational amplifier A4 be connected, the cathode of the power supply VCC respectively with
Power supply VCC negative pole ends, the cathode of the second adjustable resistance Rp2 of the negative pole end of first variable resistor Rp1, the first operational amplifier A 1
End, the power supply VCC negative pole ends of second operational amplifier A2, the power supply VCC negative pole ends of the 3rd operational amplifier A 3 and the 4th computing
The power supply VCC negative pole ends of amplifier A4 are connected, due to middle infrared detector output signal it is very faint, in order to reach filtering and
The output amplitude requirement of acquisition, processing is amplified by input signal, by using pre-amplification circuit and filtering and amplifying circuit,
It is undistorted so as to which output signal be effectively ensured, but also can effectively inhibit noise, ensure the complete of output signal, while also keep away
Exempt from output signal serious distortion or be submerged in noise, but also can be filtered according to pulse width, and will filtering
The data of output are handled by data processing circuit, and obtained result then is sent into subsequent processing.Because single-stage amplifier
Closed loop gain generally cannot be excessive, conference is crossed in gain causes the disadvantages such as frequency characteristic is poor, stability is poor, noise is big, in order to the greatest extent
Amount ensures that signal is undistorted, employs three-stage amplifier.Wherein pre-amplification circuit is most critical, to inhibit to make an uproar as far as possible
Sound ensures the complete of signal, and otherwise after filtering and amplifying circuit amplifies, signal either serious distortion or is submerged in noise
In, so the gain of pre-amplification circuit cannot be too big, and the gain of the third level amplifying circuit in filtering and amplifying circuit can be with
It is adjusted by the 3rd variable resistor Rp3 to suitable numerical value.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modifications, equivalent replacements and improvements are made should all be included in the protection scope of the present invention god.
Claims (1)
1. a kind of amplifying circuit for infrared detection system, which is characterized in that including power supply, pre-amplification circuit and amplification filter
Wave circuit, the pre-amplification circuit include first resistor, second resistance, 3rd resistor, the 4th resistance, the first capacitance, first
Variable resistor and the first operational amplifier, the filtering and amplifying circuit include the 5th resistance, the 6th resistance, the 7th resistance, the 8th
Resistance, the 9th resistance, the tenth resistance, the 11st resistance, the second adjustable resistance, the 3rd variable resistor, the second capacitance, the 3rd electricity
Appearance, the 4th capacitance, the 5th capacitance, second operational amplifier, the 3rd operational amplifier and four-operational amplifier, first electricity
Inverting input of the second end of the first end of resistance and the second resistance with the first operational amplifier is connected, second electricity
The first end of resistance is connected as signal input part, first variable resistor with the first end of the 3rd resistor, and the described 3rd
The first end of the second end of resistance, the first end of the first capacitance and the 4th resistance is defeated with the positive of first operational amplifier
Enter end to be connected, the second end of first capacitance and the equal signal ground of second end of the 4th resistance, the second of the first resistor
Output terminal of the first end of end and the 7th resistance with the first operational amplifier is connected, the second end and the 5th resistance of the 7th resistance
First end be connected with the inverting input of second operational amplifier, the first end of the second adjustable resistance and the 8th resistance
It is connected, the first end of the second end of the 8th resistance, the first end of the second capacitance and the 11st resistance is put with the second computing
The normal phase input end of big device is connected, the second end of second capacitance and the second end signal ground of the 11st resistance, and described the
Output terminal of the normal phase input end of the second end of five resistance and the 3rd operational amplifier with the second operational amplifier is connected,
The first end signal ground of 6th resistance, the second end of the 6th resistance, the first end of the 5th capacitance and the 3rd are variable
Inverting input of the first end of resistance with the 3rd operational amplifier is connected, the output of the 3rd operational amplifier
The first end of end, the second end of the second end of the 3rd variable resistor and the 5th capacitance with the 3rd capacitance is connected, and described the
First end of the second end of three capacitances respectively with the first end of the 9th resistance and the 4th capacitance is connected, the 9th resistance
Signal output part of the second end respectively with the inverting input of four-operational amplifier and four-operational amplifier is connected, and described
Normal phase input end of the second end of four capacitances respectively with the first end of the tenth resistance and four-operational amplifier is connected, described
The second end signal ground of tenth resistance, the anode of the power supply are put respectively with the positive terminal of the first variable resistor, the first computing
The big power positive end of device, the positive terminal of the second adjustable resistance, the power positive end of second operational amplifier, the 3rd operation amplifier
The power positive end of device and the power positive end of four-operational amplifier are connected, and the cathode of the power supply respectively can power transformation with first
The negative pole end of resistance, the power cathode end of the first operational amplifier, the negative pole end of the second adjustable resistance, the electricity of second operational amplifier
Source negative pole end, the power cathode end of the 3rd operational amplifier are connected with the power cathode end of four-operational amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711475379.1A CN108111130A (en) | 2017-12-29 | 2017-12-29 | A kind of amplifying circuit for infrared detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711475379.1A CN108111130A (en) | 2017-12-29 | 2017-12-29 | A kind of amplifying circuit for infrared detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108111130A true CN108111130A (en) | 2018-06-01 |
Family
ID=62214747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711475379.1A Pending CN108111130A (en) | 2017-12-29 | 2017-12-29 | A kind of amplifying circuit for infrared detection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108111130A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203970389U (en) * | 2014-07-28 | 2014-12-03 | 陈小微 | A kind of ecg signal acquiring circuit |
| CN104545858A (en) * | 2013-10-23 | 2015-04-29 | 成都芮腾科技有限公司 | Signal measuring circuit for continuous dynamic monitoring of miniature electronic sphygmomanometer |
| CN204479749U (en) * | 2015-01-22 | 2015-07-15 | 广东省自动化研究所 | A kind of ultrasonic ranging system for indoor flight unmanned plane |
| CN206673918U (en) * | 2017-05-04 | 2017-11-24 | 哈尔滨理工大学 | Pyroelectricity signal amplification circuit filter |
| CN207732730U (en) * | 2017-12-29 | 2018-08-14 | 西安柒凌防务科技有限公司 | A kind of amplifying circuit for infrared detection system |
-
2017
- 2017-12-29 CN CN201711475379.1A patent/CN108111130A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104545858A (en) * | 2013-10-23 | 2015-04-29 | 成都芮腾科技有限公司 | Signal measuring circuit for continuous dynamic monitoring of miniature electronic sphygmomanometer |
| CN203970389U (en) * | 2014-07-28 | 2014-12-03 | 陈小微 | A kind of ecg signal acquiring circuit |
| CN204479749U (en) * | 2015-01-22 | 2015-07-15 | 广东省自动化研究所 | A kind of ultrasonic ranging system for indoor flight unmanned plane |
| CN206673918U (en) * | 2017-05-04 | 2017-11-24 | 哈尔滨理工大学 | Pyroelectricity signal amplification circuit filter |
| CN207732730U (en) * | 2017-12-29 | 2018-08-14 | 西安柒凌防务科技有限公司 | A kind of amplifying circuit for infrared detection system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104242254B (en) | A kind of high-power IGBT temperature sampling protection circuit | |
| WO2009032739A3 (en) | Variable gain amplifier | |
| JP2019528657A5 (en) | ||
| CN207732730U (en) | A kind of amplifying circuit for infrared detection system | |
| CN108111130A (en) | A kind of amplifying circuit for infrared detection system | |
| CN110289817A (en) | A kind of small signal amplifier | |
| CN202838572U (en) | Simple active infrared intrusion detector warning device | |
| CN202443547U (en) | Animal detection alarm of unmanned substation | |
| KR101775487B1 (en) | Circuit for preventing mal-function of sensor light | |
| CN202231680U (en) | Microwave signal amplification and rectification circuit | |
| US20200371200A1 (en) | Radar, signal processing circuit, and signal processing method | |
| CN212301502U (en) | Digital gas probe circuit and digital gas probe | |
| CN205666801U (en) | Humidity signal collector's signal amplification circuit | |
| CN208637065U (en) | The analogue system of infrared band alarm in a kind of utilization | |
| CN207340172U (en) | One kind recording interferometer | |
| CN207753688U (en) | It discharges before a kind of photodiode road | |
| CN205647443U (en) | Electron radio signal transmits amplifier | |
| CN206370949U (en) | Industrial audio preamplifier | |
| CN203563006U (en) | Front amplification circuit for infrared alarm | |
| CN206117607U (en) | Active bandwidth -limited circuit of low frequency | |
| CN211452592U (en) | Audio signal detection circuit | |
| US5349333A (en) | Threat sector indicating warner | |
| CN208720269U (en) | A kind of boiler-burner silencing means | |
| CN206698190U (en) | A kind of human body induction detection circuit | |
| CN106303834B (en) | Mute control device and method of power amplification system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |