CN103491303B - Recording device for images of high-speed movement process - Google Patents
Recording device for images of high-speed movement process Download PDFInfo
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Abstract
The invention discloses a recording device for images of a high-speed movement process. The recording device for the images of the high-speed movement process comprises a front-end optical coupling module, a strobing type proximity focusing image intensifier, a strobing time sequence trigger and control module, a strobing high-voltage pulse generation module, a rear-end optical coupling module, a CCD image recording module and a main control computer, wherein images of a detected high-speed movement object are formed on a photocathode of the strobing type proximity focusing image intensifier through the front-end optical coupling module, the images on the photocathode are controlled by the strobing high-voltage pulse generation module to form sequential framing images of the high-speed movement object on a fluorescent screen of the strobing type proximity focusing image intensifier, the sequential framing images are coupled to the CCD image recording module through the rear-end optical coupling module, digital images are output, and a framing record of the movement process of the shot object is accomplished. The recording device for the images of the high-speed movement process can provide high-quality digitized images for research of ultra-fast processes of shock wave and detonation physical tests, analysis of trajectories of conventional weapon projectiles, material micro-jet and interface instability, track recording of high-speed flying objects and the like.
Description
Technical field
The invention belongs to high-speed photography device and technical field, it is related to one kind and can completely assume motion in piece image
The high speed optoelectronic frame imaging device of object of which movement process, is exactly specifically using when pulse number, pulse width and pulse
Between be spaced adjustable sequence high-voltage pulse string and drive single gating formula proximity-focus image intensifier photocathode to realize to motion
The image record of object of which movement process.
Background technology
High speed frame photography technology is a kind of important method of testing of research high speed motions, and it is with general camera work
Difference the most basic, it is simply that it has high time resolving power, can be followed the tracks of the generation of quick change or motion process and send out
Exhibition, and record.It is high that high speed frame photography technology has temporal resolution（Time for exposure is short）, photographic frequency high the advantages of,
The image that it shoots can reflect high speed transient process development trend in visual pattern ground, thus the generation for research high-speed motion phenomenon
Mechanism and rule provide authentic data, have the irreplaceable advantage of other means of testing.
High speed frame photography technology can be divided into opto-mechanical mechanisms high speed frame photography technology and high-speed light by imaging mode
Electric framing camera work.The former generally adopts the high-speed rotation mirror imager of electric and pneumatic control, because high-speed rotation is anti-
Penetrate mirror job stability under certain rotating speed and decline and even can deform, this leads to improve photographic frequency further very tired
Difficulty, in sub-micro second-time, photographic frequency is 10 for current each image time resolution6About width/second；Additionally, opto-mechanical mechanisms
High-speed photography device structure is complicated, bulky, complex operation, also significantly limit its application.For overcoming optical-mechanical
The high speed photography time resolution of structure and the very difficult shortcoming improving further of photographic frequency, high speed optoelectronic framing camera work
Arise at the historic moment, mainly include microwave transmission type photoelectricity framing camera work, intersect spot scan many light bars frame imaging technology, lead to more
Road optical framing photoelectricity camera work.
Microwave transmission type photoelectricity framing camera work is initially with optics pin-hole imaging method by moving object target image planes
It is divided into the multiple image planes being spatially separated, making on the microchannel plate of the proximity-focus image intensifier of rear end has microwave transmission
Line, is distributed along microwave transmission line by the detached multiple imaging image planes of optics pin-hole imaging method, when a high-voltage pulse is along microwave
During transmission line, the multiple image planes along microwave transmission line distribution will be by this pulse successively gated imaging, thus being moved
Target image planes are in not record image in the same time.Due to the motion process image temporal interval obtained by the method with pulse along micro-
The transmission time of ripple transmission line is relevant, generally in tens of picoseconds magnitude, so such system cannot obtain between the nanosecond above time
Every framing record image.
Intersect spot scan many light bars frame imaging technology and high speed frame imaging is realized using flying-spot tube electronic deflection mode, its
Single width time resolution can reach magnitude of subnanosecond, but its major defect is time resolution with picture interval be associated it is impossible to reality
Show separately adjustable, and its whole record time only has several nanoseconds it is impossible to meet motion process in microsecond or millisecond time range
Several record.
Multi-channel optical framing photoelectricity camera work is initially with prism or plane spectroscopic modes by moving object target picture
Face is divided into multiple image planes being spatially separated, and then each image planes carries out selecting at a high speed with a gating formula proximity-focus image intensifier
Logical imaging, is finally recorded by CCD again.The record picture number of this kind of technology is closely pasted by image planes quantity after light splitting and corresponding gating formula
Facused image intensifier number determines.Although single width several nanoseconds can be realized to the regulation of millisecond above time for exposure, application
Also very wide, but testee is imaged on different image intensifiers the optical spectroscopic system that this technology employs complexity, if
Unavoidably because of the introduced image deformation of the inconsistency of each beam splitting system and aberration in meter, nor in same piece image
The movement locus of upper display testee.Additionally, each separates image planes needs a corresponding gating formula proximity-focus image intensifier,
System complexity and cost certainly will be increased, reduce the stability of a system and reliability.
High speed frame imaging technology also has and utilizes selfoc lens array spectroscopic imaging, laser pulse illumination imaging etc.
Mode.Selfoc lens array spectroscopic imaging general principle is same with Multi-channel optical framing photoelectric camera shade, is also by target picture
Face is divided into multiple image planes being spatially separated and then is recorded as picture using rear end CCD；Laser pulse illumination imaging is swashed using pulse
Light illuminates target and forms short exposure time, is then recorded as picture using CCD, this high-speed imaging technology can only in background ambient light relatively
Dark place application, and higher to the hot spot uniformity requirement of laser beam, otherwise expose uneven, image quality is poor.
Content of the invention
The weak point existing for above-mentioned prior art, the main object of the present invention is to propose a kind of structure simply, only
With a channel optical coupling module and a gating formula proximity-focus image intensifier it is possible to realize high speed motions are entered
The device of the quick picture frame record of row.Because this device is not using multichannel beam splitting system, it is to avoid introduce during multi-channel image
Image deformation and aberration, and it realizes the multiple imaging to moving target with very simple structure.The exposure of imaging every time
Time is adjustable more than several nanoseconds to millisecond, and multiple imaging interval also can be more than ten nanoseconds to millisecond adjustable.This device upper
The feature of stating makes it particularly suited for the image record in few tens of nano-seconds to millisecond magnitude motion process for the time range.
The present invention adopts the following technical scheme that：A kind of high speed motions image recording structure, including front-end optical coupling
Module, gating formula proximity-focus image intensifier, gating sequential triggering and control module, gating high-voltage pulse generation module, rear end
Optical coupled module, ccd image logging modle and main control computer, the output end of described front-end optical coupling module and gating formula
The input of proximity-focus image intensifier connects, and gating formula proximity-focus image intensifier exports back-end optical coupling module and leads to
Cross ccd image logging modle and export main control computer；Described gating sequential triggering and control module complete and main control computer
While communication, control in ccd image logging modle, gating high-voltage pulse generation module connection and front-end optical coupling module
Electromagnetic shutter, described gating high-voltage pulse generation module is connected with gating formula proximity-focus image intensifier.
In technique scheme, described front-end optical coupling module include principal goods mirror, graticle, electromagnetic shutter and front in
Continue object lens, and described gating sequential triggering and control module are connected with electromagnetic shutter.
In technique scheme, described gating high-voltage pulse generation module adopts Complementary MOSFET output and its drives electricity
Line structure, described circuit include action of low-voltage pulse low and high level detection and oscillating circuit, mosfet driver, driving pulse shaping and
Drive accelerating circuit, a pair of P-channel field-effect transistor (PEFT) pipe and N-channel FET.
In technique scheme, the circuit structure of described gating sequential triggering and control module includes communication interface mould
Block, delay counter, high frequency clock module, clock counter, the CCD time of integration counts and discrimination module, multiple comparator with
And pulse combination module.
In technique scheme, the method comprising the steps of：
Step one：Initialization data, sets ccd image logging modle, gating sequential triggering by main control computer and controls
The indices of molding block, and wait external trigger input signal；
Step 2：Tested moving target is imaged onto the light of gating formula proximity-focus image intensifier through the optical coupled module in front end
On negative electrode, this photocathode is connected with gating high-voltage pulse generation module；
Step 3：When outer trigger arrives, gating sequential triggering and control module control gating high-voltage pulse to produce
Module output sequence high-voltage pulse, makes target object be imaged onto the image on photocathode and is led to by sequentially column selection, be converted into electronics
Image；
Step 4：After high pressure on the microchannel plate through being applied to gating formula proximity-focus image intensifier for the electronic image accelerates
Bombardment forms the object of which movement process being associated with moving object position on the fluorescent screen of gating formula proximity-focus image intensifier
Image；
Step 5：Image is coupled to ccd image logging modle through back-end optical coupling module and carries out by setting time
Export after integration, image information is transferred to by main control computer by ethernet communication interface and shows or process.
In technique scheme, described gating sequential triggering and control module control gating high-voltage pulse generation module defeated
Go out the high speed train pulse string that amplitude arrives alternately change between -180V in+60V.
In technique scheme, output normality voltage is+60V, and turning-on voltage is -180V.
In technique scheme, the controlled high speed train pulse string of described alternately change realizes gating formula proximity focus picture
The multiple opening and closing of booster, by motive target imaging in gating formula proximity-focus image intensifier fluoroscopic difference position
Put.
Described gating formula proximity-focus image intensifier is by photocathode, microchannel plate and the fluorescent screen group that can repeat at a high speed gating
Become, under sequence high-voltage pulse controls, movement destination image high-speed strobe is imaged on its fluorescent screen, the near patch of this gating formula is gathered
The narrowest gating time of burnt image intensifier single can reach for ten nanoseconds, and the longest gating time can reach more than ten milliseconds.
Described gating high-voltage pulse generation module is by action of low-voltage pulse shaping unit, low-voltage driving and symmetrical high frequency FET
Composition.Its Main Function is to produce the pulse controlling gating formula proximity-focus image intensifier, is specially controlled by 5V pulse signal
+ 60V arrive -180V peak-to-peak value high pressure train pulse.This high pressure train pulse normality output level is+60V, and pulse output is low
Level -180V, exports the shortest low level pulse width 10ns, the longest more than low level pulse width 10ms, output sequence pulse
Interval between number, each pulse width and pulse all can be set by gating sequential triggering and control module.
Described gating sequential triggering and control module by communication interface, delay counter, high frequency clock, clock counter,
Multichannel comparator, the CCD time of integration count and differentiate, pulse combination several part composition.Communication interface completes this gating sequential
Triggering and the communication of control module and main control computer, the time of delay counter determining sequence pulses generation, high frequency clock is made
For the clock reference of system control work, clock counter and multichannel comparator determine to produce width and the number of train pulse,
The CCD time of integration counts and differentiates the integral counting time determining rear end ccd image logging modle, pulse combination be mainly used to by
The pulse combination one tunnel output of multiple comparator outputs.Wherein, high frequency clock can by the internal phaselocked loop of FPGA improve to
200MHz even more high, the part such as remaining delay counter, clock counter and multichannel comparator also all can be in a piece of FPGA
Interior realization.
Described ccd image logging modle has external trigger control function it is ensured that CCD is defeated in gating high-voltage pulse generation module
Start before going out train pulse the fluorescent screen images of gating formula proximity-focus image intensifier to be integrated record, integrate the record time
Length is determined according to the rising time generating last train pulse by gating sequential triggering and control module.
The beneficial effects of enforcing the present invention are：First, using the simply optical coupled module of single-path architecture, overcome and lead to more
Road optical splitting system adopts image deformation and the aberration of multiplex optical coupling module introducing, and makes whole tape deck volume
It is substantially reduced, be convenient for carrying and use；Second, frame imaging, single width are carried out using high-speed strobe formula proximity-focus image intensifier
Time for exposure is very short, the shortest image dynamic fuzzy up to 10ns, effectively in suppression shooting process；3rd, time for exposure root
According to needing adjustable on a large scale, the shortest gate duration 10ns of single width, the longest more than gate duration 10ms, meet the different record times high
The shooting demand of fast motion process；4th, only realized to motion mesh with a gating formula proximity-focus image intensifier and a CCD
The multiple frame imaging of target, each Imagewise exposure time, exposure time interval was controlled by the pulse spacing by respective pulses width control system
System, frame imaging number of times is determined by train pulse number, easy to control；5th, only with the formula proximity focus image intensifying of a gating
Device, it is to avoid using output image brightness irregularities during multiple gating formula proximity-focus image intensifier；6th, adopted using ccd image
The collection way of output, by record complete for the motion process of moving object on piece image, allows the operator to directly perceived, convenient
Analysis kinetic characteristic simultaneously directly carries out subsequent digital image process, improves conventional efficient；7th, system gates sequential triggers and controls
Molding block adopts a piece of fpga logic device design to realize, and structure is simple, and integrated level is high, and SECO precision can reach 5ns, and
And can realize to Synchronization Control such as gating high-voltage pulse, the startup of ccd image logging modle and dwell times simultaneously.
Device involved in the present invention has broad application prospects in ultrahigh speed motion process field tests, is fully able to
For shock wave and detonation physics test, the trajectory analysis of conventional weapon bullet, the micro- spray of material and Rayleigh Taylor, high-speed flight
The research of the ultrafast processes such as the track record of object provides high-quality digitized image.
Brief description
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein：
Fig. 1 is assembly of the invention structure composition block diagram；
Fig. 2 is frame imaging principle schematic of the present invention；
Fig. 3 is gating high-voltage pulse generation module composition frame chart in the present invention；
Fig. 4 is mesohigh pulses generation module working timing figure of the present invention；
Fig. 5 is the triggering of gating sequential and control module composition frame chart in the present invention；
Fig. 6 is the triggering of gating sequential and control module working timing figure in the present invention.
Specific embodiment
All features disclosed in this specification, or disclosed all methods or during step, except mutually exclusive
Feature and/or step beyond, all can combine by any way.
A kind of main assembly block diagram of structure of the present invention simple high speed motions image recording structure as shown in figure 1,
Produce mould including front-end optical coupling module, gating formula proximity-focus image intensifier, high-voltage suppling power, gating high-voltage pulse
Block, gating sequential triggering and control module, back-end optical coupling module, ccd image logging modle and main control computer totally eight
Part.Its course of work is as follows：Moving target place being shot visual field is imaged onto near patch of gating formula through the optical coupled module in front end and gathers
On the photocathode of burnt image intensifier, this photocathode is connected with gating high-voltage pulse generation module, when gating high-voltage pulse produces
When module output voltage is+60V, the image that target object is imaged onto on photocathode is not to be strobed, and only a small amount of veiling glare bangs
Hit the fluorescent screen in gating formula proximity-focus image intensifier and form background noise；When gating high-voltage pulse generation module voltage be-
During 180V, the image that target object is imaged onto on photocathode is strobed, and this image is converted into electronic image by photocathode, through applying
Bombard in gating formula proximity-focus image intensifier after the high pressure on the microchannel plate of gating formula proximity-focus image intensifier accelerates
Fluorescent screen on form the image that is associated with moving object position.In above-mentioned imaging process, during by presetting gating
Sequence triggering and control module, thus control gating high-voltage pulse generation module output amplitude to arrive in+60V alternately become between -180V
The high speed train pulse string changed, it is possible to realize the multiple opening and closing to gating formula proximity-focus image intensifier, is beaten every time
Holding all can be by motive target imaging in the gating fluoroscopic diverse location of formula proximity-focus image intensifier, and this record moving target is transported
The image of dynamic position is coupled to ccd image logging modle through back-end optical coupling module and is integrated exporting, and is connect by Ethernet
Image information is transferred to main control computer by mouth, can show that a width characterizes moving object motion process on computer display
High speed frame photography image.
For making system work process become apparent from, in conjunction with shown in Fig. 2, former to its work taking the frame imaging that double exposes as a example
Reason is further elaborated.Assume object with perpendicular to the motion of record system central optical axis upwardly direction, in t1In the moment, object exists
Position in moving target image planes is X1, it is imaged onto gating formula proximity-focus image intensifier time through the optical coupled module in front end
χ is corresponded in the image planes of pole1, at this moment gating sequential triggering and control module control gating high-voltage pulse by the work schedule setting
Generation module output voltage is the low level short pulse of -180V, and gating formula proximity-focus image intensifier photocathode drives in this pulse
Once, object is in photocathode χ for dynamic lower switch1Place's image planes are electronics through proximity-focus image intensifier photocathode opto-electronic conversion, pass through
The multiplication of proximity-focus image intensifier microchannel plate simultaneously forms χ on its fluorescent screen1' as this image planes is again through back-end optical coupled mode
Block is imaged onto image planes X that the formation of CCD image planes is associated with target moving object position1'；Equally, in t2In the moment, object is in motion
Position in target image planes is X2, gate formula proximity-focus image intensifier and equally gating under high-voltage pulse generation module controls again
Open once, be then similarly formed, in rear end CCD image planes, image planes X being associated with target moving object position2'.Due to above-mentioned
During, rear end CCD is constantly in integration imaging state, so moving target imaging X at CCD image planes1' and X2' by
Recording in one picture, as long as rationally setting interval according to the movement velocity of moving object, making the figure recording twice
As not overlapping, it is achieved that the shooting twice to object on same picture, is equivalent to and target object has been carried out with framing twice
Imaging.In the same manner, multiple frame imaging can also be realized according to above-mentioned principle.
In above-mentioned imaging process, it is applied to the sequence high speed and high pressure pulse of gating formula proximity-focus image intensifier photocathode
To the Imagewise exposure time（I.e. time resolution）And time interval tool is marginal.This sequence high speed and high pressure pulse needs to solve
Three difficult points：One is this high-speed pulse of requirement from the transfer process that positive electricity is pressed onto negative voltage and negative electricity is pressed onto positive voltage very
Hurry up, normality voltage, about+60V, opens rear voltage about -180V；Two negative pulse width being intended to be formed can be according to each
Time for exposure was adjusted to ten milliseconds of wide scopes from ten nanoseconds；The three sequence negative pulses being intended to be formed are spaced also dependent on needs from number
Ten nanoseconds were adjusted to several ms wide scope.The domestic research with regard to the formation of high speed subnanosecond pulse is a lot, but major part is all
Formed using snowslide pipe, pulse voltage is generally about upper kilovolt, and pulse width cannot be realized adjusting on a large scale, between pulse
Every the time in musec order.
For solving the problems, such as above-mentioned sequence high speed and high pressure pulses generation, the present invention adopts shown in Fig. 3 in specific design
Complementary MOSFET（Insulating gate type field effect tube）Output and its driving circuit structure, are detected and vibrated by action of low-voltage pulse low and high levels
Circuit, mosfet driver, driving pulse shaping and driving accelerating circuit, a pair of P-channel field-effect transistor (PEFT) pipe and N-channel FET
Composition.The detection of action of low-voltage pulse low and high level and oscillating circuit are realized to input low voltage control pulse low and high level detection, its function
As shown in figure 4, when action of low-voltage pulse control input is low level（0V）When, low voltage control pulse output 1 output oscillating impulse, low pressure
Pulse output 2 is controlled to stop oscillation and keep high level；Conversely, action of low-voltage pulse control input is high level（5V）When, low pressure control
Pulse output 1 processed stops oscillation and keeps high level, low voltage control pulse output 2 output oscillating impulse.Two-way complementary vibration arteries and veins
Punching drives a pair of P respectively through after mosfet driver Current amplifier, high voltage capacitor coupling, driving pulse shaping and accelerating circuit
Channel field-effect pipe and N-channel FET are alternately opened, are turned off.Specific works sequential is as shown in figure 4, action of low-voltage pulse control is defeated
When entering for low level, P-channel MOSFET is open-minded, and N-channel MOS FET turns off, and final high-voltage pulse exports+60V high level；Low pressure
When Pulse Width Control inputs as high level, P-channel MOSFET turns off, and N-channel MOS FET is open-minded, final high-voltage pulse output -180V
Low level, forms the high-voltage bipolar pulse output being controlled by front end gating pulse.Meanwhile, the width of this high-voltage pulse and pulse
Interval is determined by the width of front end low voltage control pulse and pulse spacing.
For high-speed moving object, centre section region interested in its motion process to be obtained, need to many
The initial time of secondary frame imaging exposure, number of times, exposure time interval etc. are controlled on demand；Meanwhile, also will be for difference
Motion process sets to each Imagewise exposure time width.The present invention is completed using gating sequential triggering and control module
State function.
Gating sequential triggering and control module structure as shown in figure 5, mainly include communication interface module, delay counter,
High frequency clock module, clock counter, the CCD time of integration counts and discrimination module, multiple comparator and pulse combination module
Seven functional parts.Each functional part is XC3SD1800A-4CSG484I's all in a piece of XLINX company SPANT serial model No.
Realize inside FPGA, greatly improve integrated level and the reliability of image recording structure, and this chip embedded clock frequency multiplication and pipe
Reason module, work clock can reach more than 200MHz, so that each Imagewise exposure time and imaging interval degree of regulation can be reached
To 5ns.
Gating sequential triggering and the control module course of work are：Main control computer according to the parameter setting of user will be first
System exposes the information such as delay value, the time of each exposure, the time interval of multiexposure, multiple exposure and number of times first and sends to communication interface
Module；Communication interface module calculates exposure delay value corresponding count pulse number according to pre-set parameter and is sent to time delay meter
Number device, the time according to each exposure and the time interval of multiexposure, multiple exposure（I.e. train pulse width, interval）Calculate corresponding
Count pulse number is sent to corresponding comparator 1 and arrives comparator N, calculates CCD integration according to multiple total exposure time length gauge
Time corresponding pulse count value is simultaneously sent to the CCD time of integration and counts and discrimination module, is converted into according to total exposure frequency
Train pulse number sets the working condition of pulse combination module；After the setting that communication interface module completes to other each modules
To delay counter, clock counter, the CCD time of integration counts and discrimination module, pulse combination module are once reset again
Position, and wait the arrival of external trigger input signal.
More clear with the course of work of control module for making gating sequential trigger, in conjunction with shown in Fig. 6, with 4 exposures point
As a example width imaging, its course of work is further elaborated.Fig. 6 medium-high frequency clock operating frequencies are 200MHz, are each in module
The benchmark job clock of counter.As it was previously stated, after communication interface module completes the setting to other each modules and resets, CCD
Control signal and the output of low pressure train pulse are low level（0V）.After outer trigger input signal rising edge arrives, time delay meter
Number devices are started working, when counting down to setting value T1When, delay counter output enables signal enabling clock counter, pulse combination
Module and the CCD time of integration count and discrimination module, and now the CCD time of integration counts and discrimination module exports high level, controls
Ccd image logging modle starts integration record.When clock counter is T2When, consistent with comparator 1 setting value, compare
Device 1 exports a burst pulse, and pulse combination module captures, during this burst pulse, the level of low pressure train pulse carried out 0V a to 5V
Upset；Clock counter continues accumulated counts, through T3After individual clock count, its value is consistent with comparator 2 setting value, compares
Device 2 exports a burst pulse, and pulse combination module captures and the level of low pressure train pulse carries out during this burst pulse a 5V again arrives
The upset of 0V, forming a width is T3The pulse of individual counting clock.The like, when clock counter is respectively T4、
T4+T5、T6、T6+T7、T8、T8+T9When, corresponding comparator all exports a burst pulse, and pulse combination module is at each burst pulse
All a level upset is carried out to the output of low pressure train pulse, thus forming a pulse spacing to be respectively T4-（T3+T2）、T6-
（T5+T4）、T8-（T7+T6）, pulse width is respectively T3、T5、T7、T9Train pulse string, by adjust comparator value can
So that independent adjustment is carried out to the pulse width of this train pulse string and pulse spacing.When the pulse number in train pulse string and arteries and veins
Rush synthesis module setting pulse number equal when, pulse combination module stop to follow-up comparator export burst pulse differentiation,
Output low level is kept to start to shooting next time.Additionally, when clock counter is T10When, the CCD time of integration counts
And discrimination module output low level, control ccd image logging modle to stop integration record, and reset pulse synthesis module, complete
Picture frame recording process.
In the present invention, for making ccd image logging modle effectively record gating formula proximity-focus image intensifier fluorescent screen images,
Need to make the fluorescent screen output image time fall within the CCD effective integral time by SECO, accordingly, it would be desirable to selection has outward
The CCD acquisition module that triggering controls, and require the CCD time of integration can export with the triggering of above-mentioned gating sequential and control module
CCD control signal high-level pulse width adjust.
Additionally, the present invention is in actual applications, for ensureing multiexposure, multiple exposure frame imaging quality, moving object and background color
Be preferably able to that there is higher contrast, or cooperation Gao Zhongying pulse light irradiation object be greatly improved image definition and
Contrast.
The invention is not limited in aforesaid specific embodiment.The present invention expands to and any discloses in this manual
New feature or any new combination, and the arbitrary new method of disclosure or the step of process or any new combination.
Claims (7)
1. a kind of high speed motions image recording structure, it is characterized by include front-end optical coupling module, the near patch of gating formula is gathered
Burnt image intensifier, gating sequential triggering and control module, gating high-voltage pulse generation module, back-end optical coupling module, CCD figure
As logging modle and main control computer, the output end of described front-end optical coupling module and gating formula proximity-focus image intensifier
Input connects, and gating formula proximity-focus image intensifier exports back-end optical coupling module and passes through ccd image logging modle
Export main control computer；While described gating sequential triggering and control module complete to communicate with main control computer, control CCD
Electromagnetic shutter in image recording module, gating high-voltage pulse generation module and front-end optical coupling module, described gating high pressure
Pulses generation module is connected with gating formula proximity-focus image intensifier；
Described front-end optical coupling module is made up of principal goods mirror, graticle, electromagnetic shutter and front relay objective, and prolongs optical path direction
Be followed successively by principal goods mirror, graticle, electromagnetic shutter and front relay objective, and electromagnetic shutter be arranged on differentiation plate and front relay objective it
Between, described gating sequential triggering is connected with electromagnetic shutter with control module.
2. a kind of high speed motions image recording structure according to claim 1, it is characterized by described gating high-tension pulse
Rush generation module and adopt Complementary MOSFET output and its driving circuit structure, described circuit includes the detection of action of low-voltage pulse low and high level
And oscillating circuit, mosfet driver, driving pulse shaping and driving accelerating circuit, a pair of P-channel field-effect transistor (PEFT) pipe and N-channel field
Effect pipe.
3. a kind of high speed motions image recording structure according to claim 1, it is characterized by described gating sequential is touched
Send out and the circuit structure of control module includes communication interface module, delay counter, high frequency clock module, clock counter, CCD
The time of integration counts and discrimination module, multiple comparator and pulse combination module.
4. the recording method of a kind of high speed motions image recording structure according to claim 1, it is characterized by described
Method comprises the following steps：
Step one：Initialization data, sets ccd image logging modle, gating sequential triggering by main control computer and controls mould
The indices of block, and wait external trigger input signal；
Step 2：Tested moving target is imaged onto the photocathode of gating formula proximity-focus image intensifier through the optical coupled module in front end
On, this photocathode is connected with gating high-voltage pulse generation module；
Step 3：When outer trigger arrives, gating sequential triggering and control module control gating high-voltage pulse generation module
Output sequence high-voltage pulse, makes target object be imaged onto the image on photocathode and is led to by sequentially column selection, be converted into electronic image；
Step 4：High pressure on the microchannel plate through being applied to gating formula proximity-focus image intensifier for the electronic image bombards after accelerating
The object of which movement procedural image being associated with moving object position is formed on the fluorescent screen of gating formula proximity-focus image intensifier；
Step 5：Image is coupled to ccd image logging modle through back-end optical coupling module and is integrated by setting time
After export, image information is transferred to by main control computer by ethernet communication interface and shows or process.
5. imaging method according to claim 4, it is characterized by described gating sequential triggering and control module control gating
High-voltage pulse generation module output amplitude arrives the high speed train pulse string of alternately change between -180V in+60V.
6. imaging method according to claim 5, it is characterized by shown output normality voltage be+60V, turning-on voltage be-
180V.
7. imaging method according to claim 5, it is characterized by the controlled high speed train pulse string of described alternately change is real
Now gate the multiple opening and closing of formula proximity-focus image intensifier, by motive target imaging in gating formula proximity focus image intensifying
The fluoroscopic diverse location of device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310437040.8A CN103491303B (en) | 2013-09-24 | 2013-09-24 | Recording device for images of high-speed movement process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310437040.8A CN103491303B (en) | 2013-09-24 | 2013-09-24 | Recording device for images of high-speed movement process |
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| CN104079828B (en) * | 2014-06-30 | 2017-12-19 | 中国科学院西安光学精密机械研究所 | A kind of ultrafast Gao Zhongying imaging detecting device of low-light and method |
| CN104333349B (en) * | 2014-08-21 | 2017-04-19 | 中国空气动力研究与发展中心超高速空气动力研究所 | Device and method for ultra-high speed sequential control |
| CN106713733B (en) * | 2015-11-17 | 2022-08-09 | 清华大学 | Device and method for recording object motion information |
| CN107147378A (en) * | 2017-07-03 | 2017-09-08 | 中国工程物理研究院流体物理研究所 | Dual-pulse power supply and double-exposure photoelectricity framing camera |
| CN107734232B (en) * | 2017-11-07 | 2019-12-27 | 西北核技术研究所 | Image capturing method for ultrafast random physical process |
| CN108873595B (en) * | 2018-09-12 | 2023-10-31 | 中国空气动力研究与发展中心超高速空气动力研究所 | Ultra-high speed flight model front light and shadow imaging device |
| CN111397536B (en) * | 2020-05-20 | 2021-05-04 | 西北核技术研究院 | Three-dimensional contour measuring method for penetration bullet hole of large-size reinforced concrete target plate |
| CN112433483B (en) * | 2020-09-03 | 2023-06-30 | 南京理工大学 | Sequential controller based on multi-microprocessor structure |
| CN112945204B (en) * | 2021-01-27 | 2023-03-21 | 西北核技术研究所 | Device and method for detecting framing images |
| CN115361506B (en) * | 2022-08-17 | 2024-05-24 | 中科微机电技术（北京）有限公司 | Control method of active pixel sensor, active pixel sensor and electronic equipment |
| CN116320803B (en) * | 2023-05-23 | 2023-07-25 | 苏州洞悉科技有限公司 | Driving device of image intensifier |
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