CN105372781B - The zoom control device and control method of a kind of axial variable-power optical system - Google Patents
The zoom control device and control method of a kind of axial variable-power optical system Download PDFInfo
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- CN105372781B CN105372781B CN201510888211.8A CN201510888211A CN105372781B CN 105372781 B CN105372781 B CN 105372781B CN 201510888211 A CN201510888211 A CN 201510888211A CN 105372781 B CN105372781 B CN 105372781B
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- zoom
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- optical system
- location switch
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
Abstract
The present invention relates to a kind of zoom control device of axial variable-power optical system and control method, control device includes control module, control module is moved for drive control zoom optical element on optical axis, and several location switches, control module sampling connection location switch are additionally provided with optical axis；Each location switch is corresponding with each visual field of optical system, located at setting position：For in zoom optical element into corresponding field positions moving process, location switch corresponding to triggering, in control, first paragraph direct drive zoom optical element moves axially, when corresponding to zoom optical element reaches corresponding visual field at location switch, start second segment control, the position accurate adjustment of small range is carried out to zoom optical element.The control mode is not only able to realize quick regulation, saves the time, but also have higher control and positioning precision.
Description
Technical field
The present invention relates to a kind of zoom control device of axial variable-power optical system and control method.
Background technology
The optical system of current zoomable regulation mainly has three kinds of zoom modes, is rotational variable multiple respectively, radially switches
Formula, axial zoom formula.Wherein axial zoom formula is to move Zoom lens group along the optical path direction of optical system, in former light
A new optical field of view is formed on the basis of visual field.Axial zoom formula is compared to be had with the infrared system of other two ways
Small volume, it is in light weight the advantages that, the zoom mode used at present in optical system is substantially all axial zoom formula.It is but traditional
The whole control that speed and position are carried out using PID of visual field switching, zoom mirror generally drives by motor, motor driven
Zoom mirror is moved axially, control module control connection motor drive module, and the software of PID control is provided with control module
Program, by PID software program controlled motor drive modules, motor drive module motor is rotated accordingly, is realized
The axial movement of zoom mirror.Although which positioning precision can meet the high-precision requirement of optical system, longer in stroke
Axial zoom mechanism in, switching time is longer, and its shortcoming is more obvious in the longer optical system of zoom stroke, and this is serious
Constrain the application of axial zoom infrared system.
The content of the invention
It is an object of the invention to provide a kind of zoom control device of axial variable-power optical system and control method, to solve
The problem of certainly traditional zoom control method regulating time is longer.
To achieve the above object, the solution of the present invention includes a kind of zoom control device of axial variable-power optical system, bag
Control module is included, control module moves on optical axis for drive control zoom optical element, several are additionally provided with optical axis and is arrived
Bit switch, the control module sampling connect the location switch；Each location switch is corresponding with each visual field of optical system, is located at
Setting position：For, into corresponding field positions moving process, being opened in place corresponding to triggering in the zoom optical element
Close.
The control module includes PID control unit, is arrived when zoom optical element moves axially to corresponding to corresponding visual field
When at bit switch, PID control unit controls the zoom optical element to be moved on optical axis, to realize to zoom optical element
Accurate adjustment.
The zoom optical element is arranged on a ball-screw, is moved axially using the ball-screw.
The zoom optical element is zoom mirror and/or compensating glass.
The control device also includes motor drive module, and the control module is driven by the motor drive module and controlled
The zoom optical element is made to move on optical axis.
A kind of zoom of the axial variable-power optical system for the zoom control device for being exclusively used in above-mentioned axial variable-power optical system
Control method, the control method are Discrete control mode：First paragraph direct drive zoom optical element moves axially, when
When corresponding to the corresponding visual field of zoom optical element arrival at location switch, start second segment control, the second segment control is pair
The zoom optical element carries out the position accurate adjustment of small range.
The position accurate adjustment of the small range is carried out to the zoom optical element using three ring pid control modes.
It is determined that after the position of the zoom optical element, control module control locks the zoom optical element.
Zoom control method sample segment formula control mode provided by the invention, first paragraph are sensed using location switch, real
The quick motion of existing long stroke, second segment carry out the position accurate adjustment of small range, and the more traditional whole process of this mode uses PID control
Mode, due to first paragraph using direct-driving motor rotate, quickly move optical element, the time taken in this way
Shorter, switching time is shorter, and in second segment by the way of accurate adjustment, positioning precision also obtains very big guarantee.So should
Control mode is not only able to realize quick regulation, saves the time, but also have higher control and positioning precision.
Brief description of the drawings
Fig. 1 is the system construction drawing of zoom control device；
Fig. 2 is the control flow chart of zoom control device.
Embodiment
The present invention will be further described in detail below in conjunction with the accompanying drawings.
As shown in figure 1, the zoom control device of axial zoom infrared system includes control module, bus communication module and electricity
Machine drive module.Have in the optical system and carry out the optical element of zoom regulation, motor drive module control by moving axially
System is connected to the motor for controlling the optical element to move axially, and motor drive module completes the task of motor operation, control
Molding block completes the tasks such as control flow execution and calculating, and is sent accordingly to motor drive module by bus communication module
Control instruction, the control module also have the function that the transmission of state and received.
The zoom control device also includes several location switches being arranged on optical axis, and control module sampling connection is all
Location switch.Location switch and the visual field of the optical system correspond, that is to say, that the optical system has several regard
, location switch just have it is several, such as：If the optical system has large, medium and small three visual fields, then, location switch is 3.
The present embodiment is so that the optical system has three visual fields as an example.
In addition, if if there was only a zoom mirror in variable-power optical system, then, controlling zoom mirror axial movement
When need three-arrive-place to switch.But in general, the optical element for being used for zoom regulation in optical system is zoom
Mirror and compensating glass, need during zoom to move axially zoom mirror and compensating glass simultaneously, then, zoom mirror needs three-arrive-place to switch,
Compensating glass also mutually switchs in requisition for three-arrive-place, i.e. the optical system just needs six location switches.
So it is exactly institute that the number by moving axially the optical element for realizing zoom control in optical system, which is multiplied by 3,
The number of the location switch needed.The present embodiment exemplified by being provided with the optical system of zoom mirror and compensating glass simultaneously.Correspondingly, become
Times mirror needs a motor axially to control, and compensating glass is also required to a motor and axially controlled.
Zoom mirror and compensating glass are arranged on a ball-screw, and two motors drive zoom mirror and compensating glass rolling respectively
Relative or move toward one another can be carried out along optical axis direction on ballscrew, to realize zoom.
Each location switch is located at setting position, in zoom mirror and compensating glass to corresponding field positions moving process
In, location switch corresponding to triggering.
Setting below for location switch is specifically described：
For zoom mirror, three visual fields are corresponding with three-arrive-place switch：The big corresponding location switch of visual field, middle visual field pair
Answer a location switch, the corresponding location switch of small field of view.Such as：Under middle visual field, zoom mirror has in optical system
One fixed position, zoom mirror optical system in the fixed position is middle visual field, also, is moved axially in zoom mirror
Location switch corresponding to being set on some point on the path of the fixed position, have between some point and the fixed position
A certain distance, this distance can be configured as the case may be.Under the regulation of middle visual field, zoom mirror moves axially
During the fixed position, corresponding location switch can be triggered on some point at this.For in big visual field and small field of view
The setting of location switch is identical with above-mentioned principle.
For compensating glass, the set-up mode of three-arrive-place switch is identical with zoom mirror.
So either zoom mirror or compensating glass, regardless of which of three visual fields visual field, under the visual field,
, can be in some point triggering during fixed position corresponding to the visual field is moved to when eyeglass moves axially
Corresponding location switch, by triggering location switch, realization correspondingly controls.
Control module interrupts control mode using trigger-type, and communication protocol uses RS422 bus protocols, control module
The state of being triggered is constantly in, after receiving the instruction from host computer, is instructed into interrupting and responding host computer, after the completion of response
Corresponding state is reported by RS422.
As shown in Fig. 2 after system electrification, system initialization is completed first and resets work, it is then complete using location switch
Worked into self-test, and load the current location information of two motors respectively, be arranged to relative zero-bit, then wait host computer to touch
Hair.
After control module receives the instruction of host computer zoom, bi-motor drives zoom mirror and compensating glass to assigned position respectively
Operation, two motors are used with sectional type motor control method, first paragraph direct-driving motor rotates, to carry out rapid axial shifting
It is dynamic, and sensed using location switch, zoom position is slightly responded, when at zoom mirror and compensating glass arrival location switch,
It is corresponding to start second segment control (i.e. when zoom mirror is reached at location switch, to the startup second segment control of zoom mirror；Work as compensating glass
When reaching at location switch, start second segment control to compensating glass, the control of two eyeglasses is separate), carry out small range
The accurate adjustment of PID positions, reach to the quick of motor movement and precise controlling.
Second segment motor control, by calculating, can obtain the real-time position of motor using typical three ring PID control structures
Put with real-time velocity information, ratio, integration, differential are then carried out with the specified location to be reached and is adjusted, as position ring
Output；Input of the output as speed ring, the speed needed by computational theory, and carry out ratio, product with real-time speed
Divide, differential regulation, the output as speed ring；Input of the output as electric current loop, the sampling resistor with armature electric current
The voltage at both ends carries out ratio, integration, differential, as the output of whole three close-loop control, so as to change accounting for for PWM (pulsewidth modulation)
Empty ratio, reach the purpose of controlled motor.
If above-mentioned PID control method to be regarded as to the One function module in control module, it is PID control list
Member, the PID control unit are internally provided with software program, PID control are realized by software program corresponding to execution.Work as zoom
When mirror and compensating glass are moved axially at corresponding location switch, PID control unit control zoom mirror and compensating glass are on optical axis
It is mobile, to realize the PID accurate adjustments to zoom mirror and compensating glass axle.
In addition, after determining zoom mirror and compensating glass during the control module free time and after by accurate adjustment, use is soft
Part electronics self-locking manner, keeps the accurate location of optical mirror slip, and eyeglass is locked in into current field, until next visual field is cut
Change the arrival of order.
In the present embodiment, control module is made up of DSP and its peripheral circuit, and using TMS320LF2407 as control
The core of molding block, it runs highest dominant frequency up to 40MHz, has a variety of peripheral hardwares, such as A/D converter, serial SCI, SPI, CAN
Communication, motor drive module EVA and EVB, the interior FLASH memory spaces with 32K of piece, using two-stage interrupt structure, it can meet
The system demand.
In addition, the axial movement of optical mirror slip is realized using ball-screw mode, can be fine while volume is reduced
Guarantee optical axis uniformity and repeatability precision；Driving source selects two brush direct current motors, and maximum speed is up to 10000r/
min；Matching used brush motor drive module, control accuracy can reach 2000 lines/r.
Specific embodiment is presented above, but the present invention is not limited to described embodiment.The base of the present invention
This thinking is above-mentioned basic scheme, for those of ordinary skill in the art, according to the teachings of the present invention, designs various changes
The model of shape, formula, parameter simultaneously need not spend creative work.It is right without departing from the principles and spirit of the present invention
The change, modification, replacement and modification that embodiment is carried out are still fallen within protection scope of the present invention.
Claims (7)
1. a kind of zoom control device of axial variable-power optical system, including control module, control module becomes for drive control
Times optical element is moved on optical axis, it is characterised in that several location switches, the control module sampling are additionally provided with optical axis
Connect the location switch；Each location switch is corresponding with each visual field of optical system, located at setting position：For in the change
Times optical element is into corresponding field positions moving process, location switch corresponding to triggering；
The control module includes PID control unit, is opened in place corresponding to corresponding visual field when zoom optical element moves axially to
When at pass, PID control unit controls the zoom optical element to be moved on optical axis, to realize the essence to zoom optical element
Adjust.
2. the zoom control device of axial variable-power optical system according to claim 1, it is characterised in that the zoom light
Learn element to be arranged on a ball-screw, moved axially using the ball-screw.
3. the zoom control device of axial variable-power optical system according to claim 1, it is characterised in that the zoom light
It is zoom mirror and/or compensating glass to learn element.
4. the zoom control device of axial variable-power optical system according to claim 1, it is characterised in that the control dress
Putting also includes motor drive module, and the control module passes through zoom optical element described in the motor drive module drive control
Moved on optical axis.
A kind of 5. axial variable-power optical system for the zoom control device for being exclusively used in axial variable-power optical system described in claim 1
Zoom control method, it is characterised in that the control method is Discrete control mode：First paragraph direct drive zoom optics member
Part moves axially, and when corresponding to zoom optical element reaches corresponding visual field at location switch, starts second segment control, institute
It is that the position accurate adjustment of small range is carried out to the zoom optical element to state second segment control.
6. the zoom control method of axial variable-power optical system according to claim 5, it is characterised in that using three rings
Pid control mode carries out the position accurate adjustment of the small range to the zoom optical element.
7. the zoom control method of axial variable-power optical system according to claim 5, it is characterised in that it is determined that described
After the position of zoom optical element, control module control locks the zoom optical element.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510888211.8A CN105372781B (en) | 2015-12-05 | 2015-12-05 | The zoom control device and control method of a kind of axial variable-power optical system |
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| CN201510888211.8A CN105372781B (en) | 2015-12-05 | 2015-12-05 | The zoom control device and control method of a kind of axial variable-power optical system |
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| CN105372781A CN105372781A (en) | 2016-03-02 |
| CN105372781B true CN105372781B (en) | 2018-02-13 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103345264A (en) * | 2013-05-31 | 2013-10-09 | 西安应用光学研究所 | Switching control method of dual-view-field optical lens |
| CN103513395A (en) * | 2012-06-15 | 2014-01-15 | 中兴通讯股份有限公司 | Passive auto-focusing method and device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5604122B2 (en) * | 2009-03-06 | 2014-10-08 | パナソニック株式会社 | Driving device, lens barrel and camera |
| CN202171675U (en) * | 2011-03-16 | 2012-03-21 | 东莞光阵显示器制品有限公司 | Multiple time optic zoom CCM |
| US9509913B2 (en) * | 2013-06-18 | 2016-11-29 | Olympus Corporation | Image pickup apparatus, method of controlling image pickup apparatus, image pickup apparatus system, and image pickup control program stored in storage medium of image pickup apparatus |
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2015
- 2015-12-05 CN CN201510888211.8A patent/CN105372781B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103513395A (en) * | 2012-06-15 | 2014-01-15 | 中兴通讯股份有限公司 | Passive auto-focusing method and device |
| CN103345264A (en) * | 2013-05-31 | 2013-10-09 | 西安应用光学研究所 | Switching control method of dual-view-field optical lens |
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