CN106791444B - The method of the active anti-Laser emission moment video interference of electro-optical system - Google Patents
The method of the active anti-Laser emission moment video interference of electro-optical system Download PDFInfo
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- CN106791444B CN106791444B CN201710061754.1A CN201710061754A CN106791444B CN 106791444 B CN106791444 B CN 106791444B CN 201710061754 A CN201710061754 A CN 201710061754A CN 106791444 B CN106791444 B CN 106791444B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/66—Remote control of cameras or camera parts, e.g. by remote control devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
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Abstract
A kind of method that the present invention proposes active anti-Laser emission moment video interference of electro-optical system, Laser interferometers point is in the position of television video, infrared video when detecting Laser emission by using oscillograph, integrated data calculates the laser synchronization offset for needing to adjust, laser synchronization signal is adjusted by being embedded in the software module real-time online in control computer in timing synchronization control circuit, so that the moment super-high pressure pulse generated when Laser emission not will cause the interference of vision signal.The present invention provides a kind of means of anti-Laser emission moment video interference for multisensor line-of-sight stabilization electro-optical system.
Description
Technical field
The invention belongs to field of photoelectric technology, a kind of method for improving video quality is related generally to, more particularly to eliminates and swashs
The method of light emitting moment video interference.
Background technique
For the electro-optical system of multisensor line-of-sight stabilization, either following-up type or warning type optoelectronic device,
Using multiple sensors, orientation, pitching and the distance measurements of acquisition target are particularly important in real time simultaneously.
It is mutually isolated between traditional distributed independent current source and each probe power with the development of accurate optoelectronic device
Design scheme be no longer satisfied high-precision multisensor line-of-sight stabilization electro-optical system miniaturization, precise treatment demand.For
Keep the TV detector, the infrared detector that share a DC power supply consistent with the sight line of laser range finder multisensor
(guaranteeing high-precision), TV detector, infrared detector and laser range finder are mounted on same pitching frame by compact, this
It allows for being equipped with filter or electromagnetism interference isolation device etc. without more spaces and load in Electric-Optic Turret mechanism.Currently,
Multiple country's beforehand research fund projects have required electro-optical system using the design scheme, but can program target reach,
Key is the anti-electromagnetic interference capability of electro-optical system, the super-high pressure pulse that moment generates when especially needing to cope with Laser emission
Interference signal.In Traditional project application, generated when using the methods of field flyback transmitting laser, power filter reply Laser emission
The effect of instantaneous pressure disturbing pulse signal be not obvious.Moreover there are the differences of high-voltage charging time when due to Laser emission
It is different, so that the laser with batch is also possible to the presence of this；And noise spot when Laser emission on TV, infrared video is deposited
In the Uncertainty for being not more than 1us, this needs to develop a kind of method of active anti-Laser emission moment video interference just to protect
Multisensor normal table in system is demonstrate,proved to work.
Summary of the invention
In order to solve the problems existing in the prior art, the invention proposes a kind of electro-optical system active anti-Laser emission moments
The method of video interference provides what a kind of anti-Laser emission moment video interfered for the electro-optical system of multisensor line-of-sight stabilization
Means.
Laser interferometers point is in the position of television video, infrared video when this method detects Laser emission by using oscillograph
It sets, integrated data calculates the laser synchronization offset for needing to adjust, by being embedded in timing synchronization control circuit in control computer
In software module realize.Real-time online adjusts laser synchronization signal, so that the moment super-high pressure pulse generated when Laser emission
The interference of vision signal is not will cause.
In electro-optical system, to control computer as information processing centre, pass through interrupt mode real-time reception operation bench
Control instruction and laser synchronization offset, and the instruction and offset are exported in real time and give timing synchronization control circuit.Timing
Synchronous control circuit is embedded in control computer, carries out data and instruction friendship by high speed cpci bus and control computer
It changes；Meanwhile timing synchronization control circuit receives outside timing system reference signal, the requirement according to electro-optical system to each equipment generates
The television clocks synchronization signal synchronous with outside timing system reference signal and infrared clock sync signal；It is sent according to control computer
Control instruction and laser synchronization offset generate laser synchronization signal after carrying out integrated treatment in real time.Pass through these synchronization signals
Control makes each sensor synchronization, orderly work inside optronic tracker, while eliminating Laser emission moment and doing to vision signal
It disturbs.
The technical solution of the present invention is as follows:
A kind of method of the active anti-Laser emission moment video interference of the electro-optical system, it is characterised in that: including with
Lower step:
Step 1: electro-optical system powers on, normal to start TV detector, thermal infrared imager and laser range finder；
Step 2: after electro-optical system completes target tenacious tracking, control laser range finder emits laser ranging；
Step 3: the step number that laser synchronization signal need to adjust is obtained by following steps:
Step 3.1: generating fully synchronized television clocks synchronization signal, infrared clock sync signal and laser synchronization letter
Number；
Step 3.2: the Infrared Video Signal for television video frequency signal and the infrared detector output that TV detector is exported
It is coupled with the two-way input terminal of oscillograph, Laser interferometers signal is found on oscilloscope display interface in TV, infrared video
The time point T of signalls；
Step 3.3: calculating Laser emission shift time L=Tls-TO, wherein TOFor the field synchronization time started；
Step 3.4: being calculated according to formula S=6H-L and obtain laser adjusting parameter amount S, wherein H is the row period；
Step 3.5: the step number D that laser synchronization signal need to adjust being calculated according to formula D=S/ λ, wherein λ is that laser synchronization is inclined
Shifting amount adjusting step；
Step 4: control laser range finder stops transmitting laser, and the laser synchronization signal obtained according to step 3 needs to adjust
Step number, adjust laser synchronization signal to change laser emission time, it is dry to realize that electro-optical system eliminates Laser emission moment video
It disturbs.
Further preferred embodiment, a kind of method of the active anti-Laser emission moment video interference of electro-optical system,
It is characterized by: the Laser emission charging time is not more than 2 λ.
Beneficial effect
The beneficial effects of the present invention are embodied in the following aspects:
(1) present invention is by the timing control to working sensor synchronization signal each in electro-optical system, in conjunction with laser reality
The synchronisation offset that emission measurement arrives adjusts laser synchronization signal by algorithm real time modifying, to guarantee that different sensors regard
The consistency of frequency evidence, while when improving electro-optical system tenacious tracking target, the performance indicator of real-time property.
(2) in the present invention, eliminating the interference of Laser emission moment video is software implementation method.It is steady with other video denoisings
Determine the prior arts such as technology (hardware devices such as multi-purpose filter) to compare, volume of the invention, weight and cost decline to a great extent, very
The miniaturization of photoelectric stable platform proposition, the war skill requirement of precise treatment are met well.
(3) since the present invention is during photovoltaic carries out laser ranging, adjustment laser synchronization signal in real time is first passed through
It is pre-processed, variation range of the Laser emission instantaneous interference signal in TV, infrared video is limited, so as to effectively
The extra-high voltage for avoiding Laser emission moment from occurring, to electromagnetic interference caused by vision signal in optoelectronic device.
Detailed description of the invention
Fig. 1 is the composition block diagram of preferred embodiment providing method of the present invention.
Fig. 2 is the schematic diagram of composite video signal field synchronization and field blanking.
Fig. 3 is the step block diagram that the operating process of present example method executes.
Specific embodiment
With reference to the accompanying drawing and preferred embodiment the present invention is described in further detail.
The method that the active anti-Laser emission of electro-optical system that the preferred embodiment of the present invention provides causes moment video to interfere,
Its form as shown in Figure 1, the system include operation bench, it is control computer, timing synchronization control circuit, TV detector, infrared
Detector, laser range finder and oscillograph.
Operation bench provides man-machine interactive interface, assigns laser range finder ranging order, adjusts laser synchronization using step-by-step movement
Offset, the operation control of canbe used on line laser synchronization offset increase and decrease.Outside timing system reference signal is provided simultaneously, makes electro-optical system
Internal each monomer timing is consistent with operation bench timing.
Computer is controlled as information processing centre, passes through the control instruction and laser of interrupt mode real-time reception operation bench
Synchronisation offset, and the instruction and offset are exported in real time and give timing synchronization control circuit.
Timing synchronization control circuit is embedded in control computer, is counted by high speed cpci bus and control computer
It is exchanged according to instruction；Meanwhile timing synchronization control circuit receives outside timing system reference signal, according to electro-optical system to each equipment
It is required that generating the TV synchronousing signal and infrared synchronous signal synchronous with outside timing system reference signal；It is sent according to control computer
Control instruction and laser synchronization offset integrated treatment after generate laser synchronization signal in real time.Pass through the control of these synchronization signals
System makes each unit synchronization, orderly work inside optronic tracker, controls different sensors in synchronization and detects same mesh
Mark realizes each sensor output data synchronous acquisition, synchronous transmission.
TV detector receives the television clocks synchronization signal of timing synchronization control circuit output, exports television video in real time
Signal is synchronous with outside timing system reference signal.Infrared detector receives the synchronous letter of infrared clock of timing synchronization control circuit output
Number, it is synchronous with outside timing system reference signal that Infrared Video Signal is exported in real time.It is defeated that laser range finder receives timing synchronization control circuit
Laser synchronization signal out emits laser according to the timing, realizes to target when receiving the ranging order of operation bench sending
Ranging.Noise spot when oscillograph is used to measure television video frequency signal, Infrared Video Signal and laser ranging on video.
The method of the active anti-Laser emission instantaneous interference of the present invention is by being embedded in timing synchronization control in control computer
Software module is realized in circuit processed, on-line tuning laser synchronization signal, so that the Laser interferometers generated when Laser emission moment
It will not influence the stability of video.Specific method the following steps are included:
Step 1: electro-optical system powers on, normal to start TV detector, thermal infrared imager and laser range finder；
Detailed start-up course are as follows:
Step 1.1: electro-optical system powers on, and completes control computer initialization, by TV detector, thermal infrared imager and swashs
The power-up instruction of ligh-ranging machine is set to 0；Laser synchronization offset D is set to 0；
Step 1.2: " power-up " instruction being successively respectively issued to laser range finder, TV detector and thermal infrared imager；
Step 1.3: judging whether that receiving laser range finder, TV detector and thermal infrared imager returns " power-up " accused
State, if NO, then return step 1.2 then carry out step 2 operation if YES；
Step 2: after electro-optical system completes target tenacious tracking, control laser range finder emits laser ranging；
Detailed step are as follows:
Step 2.1: after electro-optical system completes target tenacious tracking, when needing to obtain the distance measurements of target, operation bench will
Laser range finder is issued in " laser ranging " instruction, and is received laser range finder and returned " ranging " state of announcement；
Step 2.2: judge whether laser range finder emits laser, if NO, then return step 2.1, if YES, then
Carry out step 3 operation；
Step 3: the step number that laser synchronization signal need to adjust is obtained by following steps:
Step 3.1: the timing synchronization control circuit for being embedded in control computer generates fully synchronized television clocks and synchronizes
Signal, infrared clock sync signal and laser synchronization signal detect same target to control different sensors in synchronization；
Step 3.2: the Infrared Video Signal for television video frequency signal and the infrared detector output that TV detector is exported
It is coupled with the two-way input terminal of oscillograph, Laser interferometers signal is found on oscilloscope display interface in TV, infrared video
The time point T of signalls；There may be the deviation for being less than 0.1us between television video frequency signal and Infrared Video Signal, it can
It ignores；
Step 3.3: calculating Laser emission shift time L=Tls-TO, wherein TOFor the field synchronization time started；
Step 3.4: can be seen that from the functional block diagram of Fig. 2 composite video signal field synchronization and field blanking can be according to formula S
=6H-L, which is calculated, obtains laser adjusting parameter amount S, and wherein H is the row period, according to full television image principle, row cycle H=
64us；
Step 3.5: laser adjusting parameter amount S being converted into the data as unit of step-length, so as to subsequent middle using soft
Part is adjusted laser synchronization signal: calculating the step number that laser synchronization signal need to adjust according to formula D=S/ λ, (i.e. laser is same
Walk offset) D, wherein λ is laser synchronization offset adjusting step；There are the differences of high-voltage charging time when due to Laser emission
Different, the general charging time is no more than the error of 1us, so the step-length of laser synchronization offset, which is set as a step-length, is
0.5us, i.e. charging time are not more than 2 step-lengths；
Step 4: control laser range finder stops transmitting laser, and the laser synchronization signal obtained according to step 3 needs to adjust
Step number, adjust laser synchronization signal to change laser emission time, it is dry to realize that electro-optical system eliminates Laser emission moment video
It disturbs；
Detailed process are as follows:
Step 4.1: " stopping laser ranging ", laser range finder is issued in instruction, and is received laser range finder and returned to accuse and " stop
Ranging " state；
Step 4.2: judge whether laser range finder stops emitting laser, if NO, then return step 4.1, if it is
It is then to carry out step 4.3 operation；
Step 4.3: judging whether to receive " adjusting parameter " instruction of operation bench sending, if it is otherwise repeating this step
Suddenly, if YES, then step 4.4 operation is carried out；
Step 4.4: adjusting parameter being sent to timing synchronization control circuit, timing synchronization control circuit, which receives, to be needed to adjust
Step quantity D, former laser synchronization signal is handled by software, can be adjusted laser synchronization signal change Laser emission when
Between, to realize that electro-optical system eliminates the interference of Laser emission moment video.
Claims (2)
1. a kind of method of the active anti-Laser emission moment video interference of electro-optical system, it is characterised in that: the following steps are included:
Step 1: electro-optical system powers on, normal to start TV detector, thermal infrared imager and laser range finder；
Step 2: after electro-optical system completes target tenacious tracking, control laser range finder emits laser ranging；
Step 3: the step number that laser synchronization signal need to adjust is obtained by following steps:
Step 3.1: the timing synchronization control circuit for being embedded in electro-optical system control computer generates fully synchronized television clocks
Synchronization signal, infrared clock sync signal and laser synchronization signal；
Step 3.2: the Infrared Video Signal difference for television video frequency signal and the infrared detector output that TV detector is exported
It is connected to the two-way input terminal of oscillograph, Laser interferometers signal is found on oscilloscope display interface in TV, Infrared Video Signal
Time point Tls；
Step 3.3: calculating Laser emission shift time L=Tls-TO, wherein TOFor the composite video signal field synchronization time started；
Step 3.4: being calculated according to formula S=6H-L and obtain laser adjusting parameter amount S, wherein H is the composite video signal row period；
Step 3.5: the step number D that laser synchronization signal need to adjust being calculated according to formula D=S/ λ, wherein λ is laser synchronization offset
Adjusting step；
Step 4: control laser range finder stops transmitting laser, and judges whether to need adjusting parameter, if desired, then by step 3
The step number that obtained laser synchronization signal need to adjust is sent into timing synchronization control circuit, and it is same that timing synchronization control circuit adjusts laser
Step signal realizes that electro-optical system eliminates the interference of Laser emission moment video to change laser emission time.
2. the method for the active anti-Laser emission moment video interference of a kind of electro-optical system according to claim 1, feature
Be: the Laser emission charging time is not more than 2 λ.
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| CN201710061754.1A CN106791444B (en) | 2017-01-26 | 2017-01-26 | The method of the active anti-Laser emission moment video interference of electro-optical system |
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|---|---|---|---|---|
| CN102289231A (en) * | 2011-05-03 | 2011-12-21 | 中国兵器工业第二〇五研究所 | Receiving control circuit synchronized with absolute time of photoelectric tracer |
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2017
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|---|---|---|---|---|
| CN102289231A (en) * | 2011-05-03 | 2011-12-21 | 中国兵器工业第二〇五研究所 | Receiving control circuit synchronized with absolute time of photoelectric tracer |
| CN103345192A (en) * | 2013-06-12 | 2013-10-09 | 西安应用光学研究所 | Intelligent clock synchronous-control circuit used for photoelectric tracker |
| CN103869806A (en) * | 2014-03-18 | 2014-06-18 | 江苏杰瑞科技集团有限责任公司 | Photoelectric video target echo simulating device |
Non-Patent Citations (2)
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| 光电搜跟系统模式切换特性及控制研究;马东玺等;《中国博士学位论文全文数据库》;20120715;全文 |
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