CN109391776A - A kind of focusing compensating control method for photoelectric nacelle continuous vari-focus infrared assembly - Google Patents
A kind of focusing compensating control method for photoelectric nacelle continuous vari-focus infrared assembly Download PDFInfo
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- CN109391776A CN109391776A CN201811498057.3A CN201811498057A CN109391776A CN 109391776 A CN109391776 A CN 109391776A CN 201811498057 A CN201811498057 A CN 201811498057A CN 109391776 A CN109391776 A CN 109391776A
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- focusing
- visual field
- zoom
- zoom motor
- small electromotor
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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
- H04N23/67—Focus control based on electronic image sensor signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/30—Transforming light or analogous information into electric information
- H04N5/33—Transforming infrared radiation
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Automatic Focus Adjustment (AREA)
- Lens Barrels (AREA)
- Closed-Circuit Television Systems (AREA)
- Control Of Position Or Direction (AREA)
Abstract
The present invention proposes a kind of focusing compensating control method for photoelectric nacelle continuous vari-focus infrared assembly, utilize articulation point and visual field size of the zoom motor with focusing small electromotor in multiple positions in parallel light tube and turntable calibration infrared assembly, being calculated by linear interpolation arithmetic can make image keep clearly zoom motor and focusing small electromotor position curve and its corresponding visual field, infrared visual field given value even variation is kept according to zoom instructions when control, the given value of zoom motor and small electromotor position of focusing is calculated according to visual field and clear curve of focusing, use the current location of photoelectric encoder measurement zoom motor and small electromotor of focusing, according to the difference of the given value of motor current location and position, motor and eyeglass is set to be maintained at given position by control algolithm to make image keep clear.The present invention does not need Image Information Processing, and operand is small, at low cost, and adjustment speed is fast, image can be kept clear always on entire zoom stroke when observing distant objects.
Description
Technical field
The invention belongs to automatic control technologys, are related to a kind of novel tune for photoelectric nacelle continuous vari-focus infrared assembly
Burnt compensating control method.
Background technique
Currently, photoelectric nacelle is more and more to replace traditional more visual field infrared assemblies using continuous vari-focus infrared assembly, and
It is more complicated that the zoom focusing of continuous vari-focus infrared assembly controls more visual field infrared assembly.
Continuous vari-focus infrared assembly in existing domestic and international photoelectric nacelle generally uses manual focusing, or based at image
Reason carries out focusing compensation.
Manual focusing again is needed after each zoom of manual focusing, operating quantity is very big, and efficiency is very low.Based on image procossing into
Focusing compensation of going carries out image-processing operations after needing to acquire image and then moves back and forth searching by focus adjusting mechanism dragging eyeglass
Articulation point, image procossing calculation amount is larger, at high cost, and speed of focusing is slower.
Summary of the invention
In order to solve the problems existing in the prior art, the present invention proposes a kind of for photoelectric nacelle continuous vari-focus infrared assembly
Focusing compensating control method.Distant object is observed since photoelectric nacelle generally more, this focusing compensating control method ensure that infrared
Variable focus package visual field even variation on entire zoom stroke, and focal length is directed at always infinite point, thus in photoelectric nacelle
Infrared assembly keeps image clear always when observing distant objects, and has and do not need Image Information Processing, and operand is small, at
The advantages that this is low, and adjustment speed is fast, does not need manual focusing again generally in each zoom, substantially reduces operating quantity,
Improve task efficiency.
Basic principle of the invention is: utilizing zoom motor and focusing compensation in parallel light tube and turntable calibration infrared assembly
For motor in the articulation point and visual field size of multiple positions, being calculated by linear interpolation arithmetic can make image keep clearly zoom
Motor and focusing small electromotor position curve and its corresponding visual field keep infrared visual field given when control according to zoom instructions
It is worth even variation, the given value of zoom motor and small electromotor position of focusing is calculated according to visual field and clear curve of focusing, is used
Photoelectric encoder measures the current location of zoom motor and small electromotor of focusing, according to the given value of motor current location and position
Difference, so that motor and eyeglass is maintained at given position by control algolithm to make image keep clear.
The technical solution of the present invention is as follows:
A kind of focusing compensating control method for photoelectric nacelle continuous vari-focus infrared assembly, it is characterised in that: packet
Include following steps:
Step 1: the clear curve of infrared assembly being demarcated: on the zoom motor stroke of continuous vari-focus infrared assembly
M point of covering stroke is set, and obtaining zoom motor encoder values corresponding to this M location point is respectively P1,P2,
P3..., PM；Continuous vari-focus infrared assembly is placed on turntable, infinite point target in parallel light tube is directed at, zoom motor is locked
It is scheduled on P1Position controls the focusing small electromotor of continuous vari-focus infrared assembly, and focusing compensation at this time is write down when target is clear
Motor encoder value T1, and the infrared image orientation visual field degree θ using turntable measurement at this time1；Zoom motor is locked in P again2
Position repeats above procedure, obtains corresponding focusing small electromotor encoder values T2With infrared image orientation visual field degree θ2, according to
It is secondary to analogize, zoom motor is obtained in P1,P2,P3..., PMFocusing small electromotor encoder values T corresponding to position1,T2,T3...,
TMAnd infrared image orientation visual field degree θ1,θ2,θ3..., θM；
Step 2: in practical control process, self-test being carried out to continuous vari-focus infrared assembly, adjusts zoom motor after self-test
To P1Focusing small electromotor is adjusted to T by position1Position；It is arranged one 0 to the variable x between N, initial value 0, wherein N
For setting value；When receiving makes the increased zoom commands of visual field, x is made from increasing 1 when receiving in each calculating cycle finish time
When the zoom commands that visual field reduces, x is subtracted 1 certainly in each calculating cycle finish time；
Step 3: in each calculating cycle, the given value θ of current field is calculated according to current x valuex:
And determine θxLocating infrared image orientation visual field degree section, if θxIn θnWith θn+1Between, n=1,2 ...,
M, then according to formula
Obtain the given value P of zoom motor positionx；Further according to PxCalculate the focusing compensation that image clearly needs at this time of sening as an envoy to
The given value T of motor positionx:
Obtain the given value P of zoom motor positionxWith the given value T of focusing small electromotor positionxAfterwards, zoom motor is acquired
With the present position values of focusing small electromotor, zoom motor and focusing small electromotor are adjusted according to corresponding position deviation, make to become
Burnt motor and focusing small electromotor are on given position.
Beneficial effect
The present invention makes the infrared variable focus package of photoelectric nacelle visual field even variation on entire zoom stroke, and focal length one
Straight alignment infinite point has to not have to frequent manual focusing in the infrared zoom of gondola and does not need Image Information Processing,
The advantages that operand is small, at low cost, and adjustment speed is fast
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 is the infrared focusing compensation control block diagram of photoelectric nacelle continuous vari-focus of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, the embodiment is exemplary, it is intended to it is used to explain the present invention, and
It is not considered as limiting the invention.
Photoelectric nacelle continuous vari-focus infrared assembly can control there are two eyeglass, with the fortune of two linear motor control eyeglasses
Dynamic, zoom motor controls the movement of focus-variable lens, the movement of focusing small electromotor control focusing compensation eyeglass.It is compiled with two photoelectricity
Code device acquires the turned position of two motors respectively, to calculate the mobile distance of eyeglass.
The clear curve of infrared assembly is demarcated first: being set on the zoom motor stroke of continuous vari-focus infrared assembly
The M roughly equidistant point of covering stroke is set, takes M=20 in the present embodiment, and obtains the electricity of zoom corresponding to this M location point
Machine encoder values are respectively P1,P2,P3..., PM；Continuous vari-focus infrared assembly is placed on turntable, is aligned infinite in parallel light tube
Zoom motor is locked in P by distant object1Position controls the focusing small electromotor of continuous vari-focus infrared assembly, when target is clear
When write down focusing small electromotor encoder values T at this time1, and the infrared image orientation visual field degree θ using turntable measurement at this time1；
Zoom motor is locked in P again2Position repeats above procedure, obtains corresponding focusing small electromotor encoder values T2With infrared figure
Image aspect visual field degree θ2, and so on, zoom motor is obtained in P1,P2,P3..., PMFocusing small electromotor corresponding to position
Encoder values T1,T2,T3..., TMAnd infrared image orientation visual field degree θ1,θ2,θ3..., θM。
Step 2: in practical control process, self-test being carried out to continuous vari-focus infrared assembly, adjusts zoom motor after self-test
To P1Focusing small electromotor is adjusted to T by position1Position；It is arranged one 0 to the variable x between N, initial value 0, wherein N
For setting value, N=5000 is taken in the present embodiment；When receiving makes the increased zoom commands of visual field, terminate in each calculating cycle
X, when receiving the zoom commands for reducing visual field, is subtracted 1 certainly in each calculating cycle finish time from increasing 1 by x by the moment.
Step 3: in each calculating cycle, the given value θ of current field is calculated according to current x valuex:
When infrared assembly is to visual field augment direction zoom, θ at the uniform velocity becomes larger at any time, when infrared assembly is to visual field reduction side
When to zoom, θ at the uniform velocity becomes smaller at any time.Determine θxLocating infrared image orientation visual field degree section, if θxIn θnWith θn+1
Between, n=1,2 ..., M utilize calibration result linear interpolation then according to formula:
Obtain the given value P of zoom motor positionx；Further according to PxCalculate the focusing compensation that image clearly needs at this time of sening as an envoy to
The given value T of motor positionx:
T ceaselessly is updated according to zoom instructions using above-mentioned algorithmxAnd PxValue obtain zoom in each calculating cycle
The given value P of motor positionxWith the given value T of focusing small electromotor positionxAfterwards, acquisition zoom motor and small electromotor of focusing
Present position values adjust zoom motor and focusing small electromotor according to corresponding position deviation, make zoom motor and focusing compensation
Motor is on given position.
The algorithm is at the uniform velocity become larger at any time by the visual field θ that interpolation arithmetic maintains infrared assembly, while being transported by interpolation
Calculation ensure that when infrared assembly zoom be on the position of M point of calibration not only clearly, while on other aspects be also clearly
Clear.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are not departing from the principle of the present invention and objective
In the case where can make changes, modifications, alterations, and variations to the above described embodiments within the scope of the invention.
Claims (1)
1. a kind of focusing compensating control method for photoelectric nacelle continuous vari-focus infrared assembly, it is characterised in that: including following
Step:
Step 1: the clear curve of infrared assembly being demarcated: being arranged on the zoom motor stroke of continuous vari-focus infrared assembly
M point of stroke is covered, and obtaining zoom motor encoder values corresponding to this M location point is respectively P1,P2,P3..., PM；
Continuous vari-focus infrared assembly is placed on turntable, infinite point target in parallel light tube is directed at, zoom motor is locked in P1Position
It sets, controls the focusing small electromotor of continuous vari-focus infrared assembly, focusing small electromotor coding at this time is write down when target is clear
Device value T1, and the infrared image orientation visual field degree θ using turntable measurement at this time1；Zoom motor is locked in P again2Position, weight
Multiple above procedure, obtains corresponding focusing small electromotor encoder values T2With infrared image orientation visual field degree θ2, and so on,
Zoom motor is obtained in P1,P2,P3..., PMFocusing small electromotor encoder values T corresponding to position1,T2,T3..., TMAnd it is red
Outer image orientation visual field degree θ1,θ2,θ3..., θM；
Step 2: in practical control process, self-test being carried out to continuous vari-focus infrared assembly, zoom motor is adjusted to P after self-test1Position
It sets, focusing small electromotor is adjusted to T1Position；It is arranged one 0 to the variable x between N, initial value 0, wherein N is setting
Value；When receiving makes the increased zoom commands of visual field, subtract visual field when receiving from increasing 1 x in each calculating cycle finish time
When small zoom commands, in each calculating cycle finish time by x from subtracting 1；
Step 3: in each calculating cycle, the given value θ of current field is calculated according to current x valuex:
And determine θxLocating infrared image orientation visual field degree section, if θxIn θnWith θn+1Between, n=1,2 ..., M, then
According to formula
Obtain the given value P of zoom motor positionx；Further according to PxCalculate the focusing small electromotor that image clearly needs at this time of sening as an envoy to
The given value T of positionx:
Obtain the given value P of zoom motor positionxWith the given value T of focusing small electromotor positionxAfterwards, zoom motor and tune are acquired
The present position values of burnt small electromotor adjust zoom motor and focusing small electromotor according to corresponding position deviation, keep zoom electric
Machine and focusing small electromotor are on given position.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811498057.3A CN109391776B (en) | 2018-12-07 | 2018-12-07 | Focusing compensation control method for photoelectric pod continuous zooming infrared assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811498057.3A CN109391776B (en) | 2018-12-07 | 2018-12-07 | Focusing compensation control method for photoelectric pod continuous zooming infrared assembly |
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| CN109391776A true CN109391776A (en) | 2019-02-26 |
| CN109391776B CN109391776B (en) | 2020-11-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112433333A (en) * | 2020-11-19 | 2021-03-02 | 湖北久之洋红外系统股份有限公司 | Synchronous parfocal error compensation method for large-zoom-ratio continuous zooming infrared lens |
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| US20070211912A1 (en) * | 2006-03-10 | 2007-09-13 | Altus Technology Inc. | Method and apparatus for lens auto-focusing in camera module test |
| CN104092933A (en) * | 2014-04-11 | 2014-10-08 | 华为技术有限公司 | Method and device for carrying out temperature compensation on camera |
| CN108259760A (en) * | 2018-03-22 | 2018-07-06 | 浙江大华技术股份有限公司 | A kind of zoom focus-compensating method and device of ball cover ball machine |
| CN108830216A (en) * | 2018-06-11 | 2018-11-16 | 北京理工大学 | A kind of adjustable continuous vari-focus target identification system of visual field and method |
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2018
- 2018-12-07 CN CN201811498057.3A patent/CN109391776B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070211912A1 (en) * | 2006-03-10 | 2007-09-13 | Altus Technology Inc. | Method and apparatus for lens auto-focusing in camera module test |
| CN104092933A (en) * | 2014-04-11 | 2014-10-08 | 华为技术有限公司 | Method and device for carrying out temperature compensation on camera |
| CN108259760A (en) * | 2018-03-22 | 2018-07-06 | 浙江大华技术股份有限公司 | A kind of zoom focus-compensating method and device of ball cover ball machine |
| CN108830216A (en) * | 2018-06-11 | 2018-11-16 | 北京理工大学 | A kind of adjustable continuous vari-focus target identification system of visual field and method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112433333A (en) * | 2020-11-19 | 2021-03-02 | 湖北久之洋红外系统股份有限公司 | Synchronous parfocal error compensation method for large-zoom-ratio continuous zooming infrared lens |
| CN112433333B (en) * | 2020-11-19 | 2022-04-05 | 湖北久之洋红外系统股份有限公司 | Synchronous parfocal error compensation method for large-zoom-ratio continuous zooming infrared lens |
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