CN104296881A - Scanning pendulum mirror signal processing circuit for linear array infrared detectors - Google Patents
Scanning pendulum mirror signal processing circuit for linear array infrared detectors Download PDFInfo
- Publication number
- CN104296881A CN104296881A CN201310627579.XA CN201310627579A CN104296881A CN 104296881 A CN104296881 A CN 104296881A CN 201310627579 A CN201310627579 A CN 201310627579A CN 104296881 A CN104296881 A CN 104296881A
- Authority
- CN
- China
- Prior art keywords
- signal
- circuit
- processing circuit
- signal processing
- zero
- 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.)
- Granted
Links
Abstract
The invention discloses a scanning pendulum mirror signal processing circuit for linear array infrared detectors, comprising a signal conversion circuit of which the signal input end is used for being connected with a ray machine scanning component. The signal output end of the signal conversion circuit is connected with a zero signal processing circuit. The signal conversion circuit comprises an operational amplifier of which the in-phase and reverse-phase input ends are respectively used for being connected with two output ends of a detection receiver. The pre-amplifier of the invention adopts a low-noise, high-precision and high-speed operational amplifier, the post processing circuit adopts an analog/digital hybrid circuit, and that a zero crossing signal is precise and stable is ensured. The signal processing circuit of the invention has the advantages of small zero signal error, high precision, high shock and impact resistance, high stability, and high environmental adaptability. Moreover, the signal processing circuit is compact in structure and small and has high reliability, and the accuracy can be maintained for both high and low-temperature test.
Description
Technical field
The present invention relates to a kind of scanning pendulum len signal processing circuit for alignment infrared eye.
Background technology
Infrared thermal imagery sensor is typical photoelectric detection equipment, and in airborne fire control system, be mainly used to carry out imaging, search, tracking, aiming to target, its basic structure as shown in Figure 1.The principle of work of infrared sensor is: the infrared radiation from scenery is assembled by infrared optical system, imaging on the detector, after detector, light signal is converted to electric signal, the parameter signals of target and the vision signal of image can be obtained by signal processing system, export visual picture by monitor.
Require to expand range of observation in modern practical application, improve pointing accuracy, have good picture quality.But within the scope of 8 ~ 12 mu m wavebands, corresponding focus planardetector technique is still immature at present, usually adopts detector array.Infrared optical system, to general objective imaging, must add optical mechaical scanning parts in the optical path, so that scenic focal point object space decomposes, makes detector array can receive the scene image of predetermined field of view, realizes the detection to target, tracking and aiming.
In optical mechaical scanning imaging system, scanning mechanism has Oscillating flat mirror (referred to as pendulum mirror), rotary reflection mirror drum and rotating wedge etc., and scanning pendulum len is the most frequently used a kind of scan mode.Compared with other scan modes, pendulum scarnning mirror an important advantage be scan efficiency can do higher, be conducive to signal to noise ratio (S/N ratio) and the radiosensitivity of raising system like this.And the existing scanning pendulum len signal processing circuit for alignment infrared eye, a large amount of discrete component overlap joints is adopted to form signal processing circuit, form positive and negative zero cross signal with Sheffer stroke gate and trigger and produce circuit, although precision is high, but the design of this signal processing circuit is complicated, use a large amount of discrete component, reliability is not high.In addition, the power amplifier volume of generation pendulum mirror coil drive signal is large, amplification efficiency is low.
Summary of the invention
The object of this invention is to provide a kind of scanning pendulum len signal processing circuit for alignment infrared eye, to solve the low and bulky problem of available circuit reliability.
In order to realize above object, the technical solution adopted in the present invention is: a kind of scanning pendulum len signal processing circuit for alignment infrared eye, it is characterized in that: comprise the signal conversion circuit of signal input part for being connected with optical mechaical scanning parts, the signal output part of described signal conversion circuit is connected with zero signal treatment circuit; Described signal conversion circuit comprises the operational amplifier that homophase and inverting input are respectively used to be connected with two of detector corresponding output terminals of oppositely going here and there the search receiner established; Described zero signal treatment circuit comprises the limiting amplifier, emitter follower and the positive and negative zero cross signal shaper that connect in turn, described positive and negative zero cross signal shaper comprises two monostable unit, the output terminal of described emitter follower is connected with the normal phase input end of a monostable unit and the inverting input of another monostable unit respectively, at the output terminal positive zero cross signal of corresponding generation and the negative zero cross signal respectively of described two monostable unit.
Described positive and negative zero cross signal shaper adopts two monostable unit.
Described emitter follower adopts triode to form.
Described signal conversion circuit adopts signal converter plate, and zero signal treatment circuit adopts zero signal disposable plates.
Described zero signal disposable plates also comprises a power amplifier circuit, the control signal input end of described power amplifier circuit is used for being connected with the control signal output terminal of following control system, and the signal output part of power amplifier circuit is used for being connected with pendulum mirror coil drive by a diode current limliting bridge circuit.
The simulating signal that the optical mechaical scanning parts of scanning pendulum len produce by the scanning pendulum len signal processing circuit that the present invention is used for alignment infrared eye is connected with the emitter follower that triode is formed after operational amplifier exports, the output terminal of emitter follower with connect the zero cross signal shaper circuit that comprises two monostable unit, two monostable unit are arranged respectively to one for rising edge triggering, one is negative edge triggering, and then correspondence is just being formed respectively, negative zero cross signal, prime amplifier of the present invention adopts low noise, high precision, high speed amplifier is calculated amplifier and is realized, post processing electric circuit adopts analog/digital hybrid circuit, guarantee that zero cross signal is accurate, stable.Signal processing circuit zero signal error of the present invention is little, precision is high, vibration resistance and impact, good stability, and environmental suitability is strong; Compact conformation, small and exquisite, good reliability, thermocycling still can keep precision.
Zero cross signal shaper adopts two monostable unit to produce positive and negative zero cross signal, and integrated level is high, saves printed board area.
In addition, adopt power amplifier to produce pendulum mirror coil drive signal, volume is little, and power is high.
Accompanying drawing explanation
Fig. 1 is the basic structure block diagram of existing infrared imaging system;
Fig. 2 is the scanning pendulum len signal processing circuit embodiment schematic block circuit diagram of the present invention for alignment infrared eye;
Fig. 3 is signal conversion circuit schematic diagram of the present invention;
Fig. 4 is the schematic diagram of zero signal treatment circuit of the present invention;
Fig. 5 is scanning pendulum len treatment circuit signal relation figure of the present invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the present invention is described further.
Be illustrated in figure 2 the scanning pendulum len signal processing circuit embodiment schematic block circuit diagram of the present invention for alignment infrared eye, as seen from the figure, this circuit comprises the signal conversion circuit of signal input part for being connected with optical mechaical scanning parts, and the signal output part of signal conversion circuit is connected with zero signal treatment circuit; Signal conversion circuit comprises the operational amplifier that homophase and inverting input are respectively used to be connected with two of infrared eye corresponding output terminals of oppositely going here and there the search receiner established; Zero signal treatment circuit comprises the limiting amplifier, emitter follower and the positive and negative zero cross signal shaper that connect in turn, positive and negative zero cross signal shaper comprises two monostable unit, the output terminal of emitter follower is connected with the normal phase input end of a monostable unit and the inverting input of another monostable unit respectively, at the output terminal positive zero cross signal of corresponding generation and the negative zero cross signal respectively of two monostable unit.
The signal conversion circuit of the present embodiment adopts signal converter plate, and zero signal treatment circuit adopts zero signal disposable plates.
As shown in Figure 3, when the scanning pendulum len of infrared eye swings, the luminous point that the infrared-emitting diode V2 of scanning pendulum len optical mechaical scanning parts launches alternately impinges upon two field photodetection diode V1(and search receiner) two receiving planes on.Two photodetection diodes are two adjacent photodiodes, its two output terminals are connected to in-phase input end+IN and the inverting input-IN of the operational amplifier D1 of scanning pendulum len signal converter plate respectively, like this along with the swing of scanning pendulum len, the input end of operational amplifier just obtains the near sinusoidal ripple half-wave voltage signal be directly proportional to photodetection diode received power, near sinusoidal ripple signal is just obtained at the output terminal of amplifier, as shown in Figure 5 after homophase and inverting input difference.Two photodiode tie point ground connection of two photodetection diode V1, equally, the homophase of D1 and inverting input are also respectively by resistance R4 and the R5 ground connection of correspondence; The output terminal output of D1 is connected with inverting input-IN by resistance R1, and the positive source+Un of D1 connects a slide rheostat R2, and between power cathode and positive source, string is provided with electric capacity C11 ~ C12, and operational amplifier D1 selects the OP37 of AD company.
As shown in Figure 4, the near sinusoidal ripple signal that scanning pendulum len signal converter plate exports enters the OP37 of the operational amplifier D2(AD company of scanning pendulum len zero signal disposable plates), D2 and electric capacity C1 ~ C4, resistance R6 ~ R9 and R15 together form limiting amplifier, carry out homophase and anti-phase amplification and amplitude limiting processing to input signal.Because the power supply of the large device D2 of integrated transporting discharging is ± 15V, enlargement factor is set as 1000 times, and the sine waveform that therefore operational amplifier D2 exports is the approximate square waves of peak-to-peak value ± 15V, as shown in Figure 5.Square-wave signal is through by triode V3(3DK9H) emitter follower that forms, emitter follower i.e. common-collector amplifier, its feature is that voltage gain is close to 1, input signal and output signal homophase, size is substantially equal, and in addition, its input impedance is large, output impedance is little, has the effect of isolated impedance conversion.In the present embodiment because the collector supply of V3 is+5V, therefore emitter follower output signal is the approximate figure square-wave signal of amplitude 0V ~ 5V, so just utilize emitter follower to achieve the conversion of simulating signal and digital signal, the square-wave signal that emitter follower exports is as the input signal of digital device.
The positive and negative zero cross signal shaper of the present embodiment adopts two monostable unit D3(54LS221), comprise two monostable unit A and B, after square-wave signal exports from emitter follower, be input to the inverting input of the monostable unit A of D3 and the positive input of monostable unit B simultaneously, monostable unit A is set to rising edge and triggers, monostable unit B is set to negative edge and triggers, the trigger pulse width exported is by adjusting the electric capacity that is connected of RCext with Cext and resistance is determined, then A exports as positive zero cross signal, B exports as negative zero cross signal, owing to have employed reliable and stable circuit design, effectively overcome the ability that circuit self-excitation improves anti-system interference.
In addition, zero signal disposable plates also comprises a power amplifier circuit, the control signal input end of power amplifier circuit is used for being connected with the control signal output terminal of following control system, and the signal output part of power amplifier circuit is used for being connected with pendulum mirror coil drive by a diode current limliting bridge circuit.As shown in Figure 4, zero signal disposable plates receives from PWM+, the PWM-of CPU board in following control system and power amplifier enable signal, PWM+ and PWM-is input to input end 1 and the input end 2 of power amplifier D4, power amplifier output signal, after 4 diode current limlitings, produce two-way pendulum mirror coil drive signal, transmission and the stopping of drive singal are controlled by the Enable Pin of power amplifier.The frequency that pendulum mirror swings is determined by the frequency of PWM+ and PWM-, and amplitude of fluctuation is by the V of power amplifier
sthe voltage of end determines.According to frequency of operation and the visual field needs of alignment infrared eye, scanning pendulum len can be operated in 25Hz(V
s=20V) and 100Hz(V
s=10V) two states.
Claims (5)
1. the scanning pendulum len signal processing circuit for alignment infrared eye, it is characterized in that: comprise the signal conversion circuit of signal input part for being connected with optical mechaical scanning parts, the signal output part of described signal conversion circuit is connected with zero signal treatment circuit; Described signal conversion circuit comprises operational amplifier, and homophase and the inverting input of described operational amplifier are respectively used to be connected with two of search receiner output terminals; Described zero signal treatment circuit comprises the limiting amplifier, emitter follower and the positive and negative zero cross signal shaper that connect in turn, described positive and negative zero cross signal shaper comprises two monostable unit, the output terminal of described emitter follower is connected with the normal phase input end of a monostable unit and the inverting input of another monostable unit respectively, at the output terminal positive zero cross signal of corresponding generation and the negative zero cross signal respectively of described two monostable unit.
2. the scanning pendulum len signal processing circuit for alignment infrared eye according to claim 1, is characterized in that: described positive and negative zero cross signal shaper adopts two monostable unit.
3. the scanning pendulum len signal processing circuit for alignment infrared eye according to claim 1, is characterized in that: described emitter follower adopts triode to form.
4. the scanning pendulum len signal processing circuit for alignment infrared eye according to claim 1, is characterized in that: described signal conversion circuit adopts signal converter plate, and zero signal treatment circuit adopts zero signal disposable plates.
5. the scanning pendulum len signal processing circuit for alignment infrared eye according to claim 4, it is characterized in that: described zero signal disposable plates also comprises a power amplifier circuit, the control signal input end of described power amplifier circuit is used for being connected with the control signal output terminal of following control system, and the signal output part of power amplifier circuit is used for being connected with pendulum mirror coil drive by a diode current limliting bridge circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310627579.XA CN104296881B (en) | 2013-11-28 | 2013-11-28 | A kind of scanning pendulum len signal processing circuit for alignment infrared detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310627579.XA CN104296881B (en) | 2013-11-28 | 2013-11-28 | A kind of scanning pendulum len signal processing circuit for alignment infrared detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104296881A true CN104296881A (en) | 2015-01-21 |
| CN104296881B CN104296881B (en) | 2017-12-15 |
Family
ID=52316711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310627579.XA Active CN104296881B (en) | 2013-11-28 | 2013-11-28 | A kind of scanning pendulum len signal processing circuit for alignment infrared detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104296881B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764966A (en) * | 2019-02-15 | 2019-05-17 | 东莞传晟光电有限公司 | A kind of high impedance integrated chip and pyroelectric sensor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03188338A (en) * | 1989-10-19 | 1991-08-16 | Matsushita Electric Ind Co Ltd | Two-dimensional infrared image sensing apparatus |
| US5694237A (en) * | 1996-09-25 | 1997-12-02 | University Of Washington | Position detection of mechanical resonant scanner mirror |
| CN1936754A (en) * | 2006-09-30 | 2007-03-28 | 北京航空航天大学 | Real-time optical-axis s-tabilizing system for controlling super-magnetic extending quick inclination mirror |
| CN101702615A (en) * | 2009-11-09 | 2010-05-05 | 天津理工大学 | Motor infrared remote control rotating speed control system based on double singlechips |
-
2013
- 2013-11-28 CN CN201310627579.XA patent/CN104296881B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03188338A (en) * | 1989-10-19 | 1991-08-16 | Matsushita Electric Ind Co Ltd | Two-dimensional infrared image sensing apparatus |
| US5694237A (en) * | 1996-09-25 | 1997-12-02 | University Of Washington | Position detection of mechanical resonant scanner mirror |
| CN1936754A (en) * | 2006-09-30 | 2007-03-28 | 北京航空航天大学 | Real-time optical-axis s-tabilizing system for controlling super-magnetic extending quick inclination mirror |
| CN101702615A (en) * | 2009-11-09 | 2010-05-05 | 天津理工大学 | Motor infrared remote control rotating speed control system based on double singlechips |
Non-Patent Citations (2)
| Title |
|---|
| 刘晓玮: "扫描型热像仪扫描控制技术研究", 《中国优秀硕士学位论文全文数据库信息科技辑》 * |
| 郭庆鼎等: "《交流伺服系统》", 31 July 1994 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764966A (en) * | 2019-02-15 | 2019-05-17 | 东莞传晟光电有限公司 | A kind of high impedance integrated chip and pyroelectric sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104296881B (en) | 2017-12-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Moss et al. | Low-cost compact MEMS scanning ladar system for robotic applications | |
| CN106248347B (en) | A kind of MEMS scanning mirror performance parameter measuring system and method | |
| CN104236464A (en) | Laser vibration displacement sensor and measuring method thereof | |
| CN103499819A (en) | Measuring device and method for target line-of-sight angel offset and distance | |
| CN101995233A (en) | Angle measuring method for sun precision tracking and digital photoelectric angle sensor | |
| CN202793374U (en) | Distance meter through laser triangulation | |
| CN112882052A (en) | Laser radar for space rendezvous and docking | |
| CN108303182A (en) | A kind of infrared imaging temperature monitoring system | |
| CN108051796A (en) | A kind of miniaturization coaxial-type laser radar system based on TOF | |
| CN116990826B (en) | High dynamic precision laser phase range finder | |
| CN108710135A (en) | A kind of video mosaic system configuring big visual field laser three-D detection for different axis | |
| CN205899019U (en) | Ranging system based on laser radar | |
| CN104296881A (en) | Scanning pendulum mirror signal processing circuit for linear array infrared detectors | |
| CN106291579A (en) | A kind of laser detection system having cooperative target | |
| CN204085453U (en) | A kind of laser vibrometer, displacement transducer | |
| CN208384106U (en) | laser radar device | |
| CN110133660A (en) | A kind of Quantum Well car bulb radar system | |
| CN203587223U (en) | A TDI infrared scanning imaging debugging apparatus | |
| CN206460170U (en) | A kind of new pattern laser distance-measuring equipment | |
| CN211717753U (en) | External field performance testing device for photoelectric instrument | |
| CN109238133A (en) | The collecting method and device of the facula position measurement device of Gao Zhongying laser | |
| CN205484805U (en) | Laser rangefinder with calibration function | |
| CN211013929U (en) | High-sensitivity oil smoke concentration measuring device | |
| CN110687517B (en) | Scanning range unit based on high peak power VCSEL laser instrument | |
| CN1624493A (en) | Laser aiming device in free space optical communication system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |