CN107024830A - The delay of camera mechanical shutter exposure determines device and method - Google Patents
The delay of camera mechanical shutter exposure determines device and method Download PDFInfo
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- CN107024830A CN107024830A CN201710179716.6A CN201710179716A CN107024830A CN 107024830 A CN107024830 A CN 107024830A CN 201710179716 A CN201710179716 A CN 201710179716A CN 107024830 A CN107024830 A CN 107024830A
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- camera
- light source
- measured
- controllable light
- graticle
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B43/00—Testing correct operation of photographic apparatus or parts thereof
- G03B43/02—Testing shutters
Abstract
The invention belongs to electronic information technical field, specifically related to camera mechanical shutter exposure delay determines device and method, light tight housing including being arranged on camera taking lens front end to be measured, graticle and controllable light source are provided with light tight housing, graticle and controllable light source are arranged on the front of camera lens to be measured, graticle is between controllable light source and camera lens to be measured, closed between controllable light source and camera lens to be measured, it is imaged so that the light that controllable light source is sent enters in camera to be measured after only breaking up through graticle, trigger control device is connected in controllable light source, trigger control device and the camera of camera to be measured control port of taking pictures are connected, trigger control device is used to control camera progress shutter opening to be measured or closing and controllable light source to carry out time-delay closing or unlatching in shutter opening or closing, whole device can be on the basis of not disassembling to camera, realize and camera exposure delay is accurately determined.
Description
【Technical field】
The invention belongs to electronic information technical field, and in particular to the delay of camera mechanical shutter exposure determines device and side
Method.
【Background technology】
Digital camera is with the continuous lifting of technology, and the life with us is more and more nearer.The sparetime either gone in for photography
Friend fan, still specializes in the practitioner of camera work, and the measurement of the use camera work newly risen in recent years should
With, want to obtain preferable photo, all can the state of logarithmic code camera in itself be concerned about very much with parameter, such as during the shutter of camera
Stagnant and exposure delay (shutter speed).Camera user can not almost complete the measure of these parameters, camera life by oneself
Production manufacturer also can seldom provide these parameters.Part camera production firm can also be measured to shutter time lag and exposure delay,
But its measure device is complicated, and test equipment technical requirements are high, and is all preceding for this group of camera shutter in camera assembling mostly
Part is carried out, and measurement result precision is also poor.Therefore, its method of testing, test device can not all be applied to be reluctant to carry out camera
The camera user disassembled, its measuring accuracy can not also meet the demand of professional, for photogrammetric work.
【The content of the invention】
To solve problems of the prior art, determined it is an object of the invention to provide the delay of camera mechanical shutter exposure
Device and method, the measure device is realized and camera exposure delay is accurately surveyed on the basis of not disassembled to camera
It is fixed.
The technical solution adopted in the present invention is：
The delay of camera mechanical shutter exposure determines device, including is arranged on the impermeable bare hull of camera taking lens front end to be measured
Graticle and controllable light source are provided with body, light tight housing, graticle and controllable light source are being arranged on camera lens to be measured just
Front and graticle are between controllable light source and camera lens to be measured, are closed between controllable light source and camera lens to be measured, with
The light for sending controllable light source enters in camera to be measured after only breaking up through graticle to be imaged, and triggering control is connected with controllable light source
Device, trigger control device and the camera of camera to be measured control port of taking pictures is connected, and trigger control device is used to control phase to be measured
Machine carries out shutter opening or closing and controllable light source carries out time-delay closing or unlatching in shutter opening or closing.
The light tight housing is light source and focusing component, and controllable light source and graticle are arranged on light source and focusing component
In, the material of light source and focusing component is light tight material, and light source and focusing component are arranged on camera lens front end to be measured, light source
Controllable light source and graticle can be adjusted with focusing component synchronously to move up and down, can be clear in camera to be measured to adjust graticle
Clear imaging.
Tight shot is provided between the light source and focusing component and camera lens front end to be measured, graticle is arranged on fixed
The focal position of zoom lens.
The camera to be measured is CCD camera, and control device is to be connected with control and time keeping device, control and time keeping device
Computer and the electric supply installation powered for control and time keeping device, control and time keeping device and camera to be measured and trigger control device
Connection.
The trigger control device includes being connected with camera trigger signal interface, numeral method on single-chip microcomputer, single-chip microcomputer
Battery is connected with adjustment module, light source and indicator lamp signaling interface, crystal oscillator and power supply module, power supply module, is touched
Hair control device is connected by camera trigger signal interface with camera to be measured, passes through light source and indicator lamp signaling interface and controllable light
Source is connected.
The graticle is that the division line for printing opacity is offered on impermeable tabula rasa, graticle.
The upper surface of the graticle is provided with chromium coating, and division line is engraved on chromium coating, and division line is included along graticle
The symmetrically arranged some light transmission strips of spaced radial and several loopholes, diameter residing for light transmission strip and diameter residing for loophole
It is mutually perpendicular to.
Camera mechanical shutter exposure delay assay method, comprises the following steps：
Step one, the delay time that controllable light source is opened and closed is set；
Step 2, control controllable light source carries out state switching and image shot by camera to be measured to measure camera shutter to be measured
Start-up time value t2And shutter close moment value t6；
Step 3, passes through camera shutter start-up time value t to be measured2With shutter close moment value t6Exposed to calculate camera to be measured
Light delay value T,
In the step 2, control controllable light source carries out state switching and image shot by camera to be measured to measure phase to be measured
Machine shutter opening moment value t2Detailed process it is as follows：
First, controllable light source is set on state, the light that adjustment controllable light source is sent is being treated after breaking up through graticle
Surveying has clear and legible pattern in the image that camera is shot；
Then, while controlling camera to be measured to be taken pictures and controllable light source progress state switching, controllable light source carries out shape
When state switches, controllable light source switches to closed mode after delay by unlatching；
Then, the pattern after the light that controllable light source is sent in image breaks up through graticle in the picture is observed, when in image
Have, pattern-free phenomenon when, pre-estimation delay value, the delay value is camera shutter start-up time value t2。
In the step 2, control controllable light source carries out state switching and image shot by camera to be measured to measure phase to be measured
Machine shutter opening moment value t6Detailed process it is as follows：
First, controllable light source is set on state, the light that adjustment controllable light source is sent is being treated after breaking up through graticle
Surveying has clear and legible pattern in the image that camera is shot, then controllable light source is set to off into closed state；
Then, while controlling camera to be measured to be taken pictures and controllable light source progress state switching, controllable light source carries out shape
When state switches, controllable light source switches to opening after delay by closing；
Then, the pattern after the light that controllable light source is sent in image breaks up through graticle in the picture is observed, when in image
When nothing occur, having pattern phenomenon, pre-estimation delay value, the delay value is camera shutter close moment value t6。
Compared with prior art, the present invention has the advantages that：
The camera mechanical shutter exposure delay of the present invention determines device, it is adaptable to for line traffic control function, using machinery
The camera of shutter, by the light tight housing in camera taking lens front end to be measured, is provided with graticle, no in light tight housing
The outside of light-permeable shell be provided with for camera exposure controllable light source, light tight housing controllable light source can be sent without
The whole barriers of the light of graticle are fallen, and only allow the light through graticle to be imaged into camera to be measured, also connect in controllable light source
Connect for controlling controllable light source to carry out delayed start-up or the trigger control device of closing, trigger control device connects with camera to be measured
Connect, trigger control device can control camera to be measured to carry out shutter opening or closing and controllable light source in shutter opening or closing
Shi Jinhang time-delay closings or unlatching；
When determining camera mechanical shutter exposure to be measured delay, by trigger control device set controllable light source open and
The delay time of closing；Then controllable light source is controlled to carry out state switching and camera to be measured shooting by trigger control device
Image measures camera shutter start-up time value t to be measured2And shutter close moment value t6, shutter opening is carried out in camera to be measured
Or controllable light source carries out time-delay closing or unlatching after the delay time by setting when closing；It is fast finally by camera to be measured
Door start-up time value t2With shutter close moment value t6To calculate camera exposure delay value T to be measured,
The measure device of the present invention to camera on the basis of not disassembled, and realization is accurately determined to camera exposure delay, and
Assay method simple and fast.
Further, controllable light source and graticle are arranged in light source and focusing component, the material of focusing component is not
Light-transmitting materials, can adjust controllable light source and graticle by light source and focusing component and synchronously move up and down, to adjust graticle
In camera to be measured can blur-free imaging, therefore, it is possible to solve the problem of not good imaging brought of graticle installation site is unclear,
So that the installation of graticle is easier, the problem of position installation accuracy of graticle is not high can be made up, when saving assembling
Between and cost.
Further, tight shot is provided between light source and focusing component and camera lens front end to be measured, graticle is set
Put in the focal position of tight shot, the light through graticle can be switched to directional light by tight shot, therefore be treated in measurement
Survey camera shutter start-up time value t2And shutter close moment value t6, it is easy to determine exposure time point, it is possible to increase exposure delay
Precision.
Further, the upper surface of graticle is provided with chromium coating, and division line is engraved on chromium coating, and division line includes edge point
The symmetrically arranged some light transmission strips of spaced radial and several loopholes of plate are drawn, residing for diameter residing for light transmission strip and loophole
Diameter is mutually perpendicular to, by vertically disposed light transmission strip and loophole, when observing image can according to light transmission strip on image and
The imaging of loophole detects whether graticle fills just, but also come correspondence can adjust graticle according to their imaging, because
This can be further ensured that the precision of exposure delay.
Further, camera shutter start-up time value t to be measured is being measured2When, controllable light source carry out state switching when be by
Unlatching switchs to close, thus be easy in check image to find out in image have, pattern-free phenomenon when critical point so that expose
Light delay time point is easy to find out, and is easy to operation so that the delay value estimated is more nearly actual value.
Further, camera shutter start-up time value t to be measured is being measured6When, controllable light source carry out state switching when be by
Closing switchs to open, thus be easy in check image to find out in image have, pattern-free phenomenon when critical point so that expose
Light delay time point is easy to find out, and is easy to operation so that the delay value estimated is more nearly actual value.
【Brief description of the drawings】
Fig. 1 is the structure composition schematic diagram of the measure device embodiment of the present invention；
Fig. 2 is the light source and focusing component structural representation of the measure device of the i.e. present invention in A portions in Fig. 1；
Fig. 3 is D-D schematic cross-sections in Fig. 2；
Fig. 4 is E-E schematic cross-sections in Fig. 2；
Fig. 5 is F-F schematic cross-sections in Fig. 2；
Fig. 6 is the light source board schematic diagram for determining device of the invention；
Fig. 7 is the graticle schematic diagram for determining device of the invention；
Fig. 8 is that the super long distance tight shot and Digital Zenith Camera main frame of the measure device of the present invention connect for B portions in Fig. 1
The structural representation of socket part；
Fig. 9 is the trigger control device schematic diagram of the present invention；
Figure 10 is the optical principle schematic diagram that the present invention determines device embodiment；
Figure 11 is the structural representation of the measure device of the present invention；
Figure 12 is the control signal schematic diagram that the present invention determines device.
In figure, 1. light sources and focusing component 2. surpass long distance tight shot, 3. connection components, 4. Digital Zenith Camera masters
Machine, 5. electric supply installations, 6. controls and time keeping device, 7. camera power supply cables, 8. camera data cables, 9. special images transmission electricity
Cable, 10. computers, 11. trigger control devices, 12. cameras triggering cable, 13. light source control cables；14. fixed seat, 15. points
Draw plate, 15-1. chromium coatings, 16. graduation panel seats, 17. focusing drums, 18. leads, 19. light source boards, 19-1. controllable light sources, 20.
Socket, 21. mounting seats, 22. trim rings, 23. locking handwheels, 24. coupling seats, 25. handle larynx hoops, 26. light tight housings, 27. treat
Survey camera lens, 28 cameras to be measured.
【Embodiment】
Come that the present invention is further illustrated below in conjunction with the accompanying drawings.
As shown in Fig. 1, Fig. 9-Figure 11, with reference to Fig. 2 to Fig. 8, camera mechanical shutter exposure delay of the invention determines device
Overall technical architecture it is as follows：
Graduation is provided with light tight housing 26 including being arranged on camera taking lens front end to be measured, light tight housing 26
Plate 15 and controllable light source 19-1, graticle 15 and controllable light source 19-1 are arranged on the front of camera lens 27 to be measured and graticle
15 are between controllable light source 19-1 and camera lens to be measured 27, are closed between controllable light source 19-1 and camera lens to be measured, with
The light for sending controllable light source 19-1 is imaged after only breaking up through graticle 15 in camera 28 to be measured, is connected on controllable light source 19-1
Have to be connected with trigger control device 11, trigger control device 11 and be connected with the camera of camera to be measured control port of taking pictures, triggered
Control device 11 is used to control camera to be measured to carry out shutter opening or closing and controllable light source 19-1 in shutter opening or closing
Shi Jinhang time-delay closings or unlatching；
For the camera with line traffic control function, trigger control device 11 is directly connected with camera, for such as digital day
Push up for this camera of photographic apparatus, CCD camera is to separate with camera control circuit, picture need to be by control device (as controlled
And time keeping device 6) processing can just pass to computer, now trigger control device 11 need by control and time keeping device 6 and camera
Connection.
Light tight housing is light source and focusing component, with reference to Fig. 2, controllable light source 19-1 and graticle 15 be arranged on light source and
In focusing component 1, the material of focusing component 1 is light tight material, and light source and focusing component 1 are arranged on before camera lens to be measured
End, light source and focusing component 1 can adjust controllable light source 19-1 and graticle 15 is synchronously moved up and down, and be existed with adjusting graticle 15
Being capable of blur-free imaging in camera to be measured.
With reference to Fig. 1 and Figure 10, tight shot is provided between light source and focusing component 1 and camera lens front end to be measured, point
The focal position that plate 15 is arranged on tight shot is drawn, tight shot can switch to the light through graticle directional light and in phase
It is imaged in machine.
As shown in figure 9, trigger control device 11 includes being connected with camera trigger signal interface, number on single-chip microcomputer, single-chip microcomputer
It is connected with code pipe vision-control module, light source and indicator lamp signaling interface, crystal oscillator and power supply module, power supply module
Battery, trigger control device 11 is connected by camera trigger signal interface with camera to be measured, is connect by light source and instruction modulating signal
Mouth is connected with controllable light source 19-1.The graticle 15 is that the division line for printing opacity is offered on impermeable tabula rasa, graticle 15,
Crystal oscillator selects High Precision Crystal Oscillator, can realize high-precision delay, and send control signal control controllable light source switching state.
As shown in fig. 7, the upper surface of graticle 15 is provided with chromium coating 15-3, division line is engraved on chromium coating, division line
Including the symmetrically arranged some light transmission strip 15-1 of the spaced radial along graticle and several loopholes 15-2, light transmission strip 15-1
Residing diameter is mutually perpendicular to diameter residing for loophole 15-2.
The process prolonged by the device progress camera mechanical shutter exposure of the present invention comprises the following steps：
Step one, the delay time for setting control controllable light source 19-1 to open and close；
Step 2, control controllable light source 19-1 carries out state switching and image shot by camera to be measured to measure camera to be measured
Shutter opening moment value t2And shutter close moment value t6；
Control controllable light source 19-1 carries out state switching and image shot by camera to be measured is opened to measure camera shutter to be measured
Open moment value t2Detailed process it is as follows：
First, control controllable light source 19-1 is set on state, the light that adjustment controllable light source 19-1 is sent is through graduation
Plate 15 has clear and legible pattern after breaking up in the image that camera to be measured is shot；
Then, while controlling camera to be measured to be taken pictures and made control controllable light source 19-1 carries out state switching, control
When controllable light source 19-1 carries out state switching, control controllable light source 19-1 switches to closed mode after delay by unlatching；
Then, check controllable light source 19-1 is sent in the image that camera to be measured is shot, observation image light through graticle 15
Pattern after differentiation in the picture, when being had in image, pattern-free phenomenon when, pre-estimation delay value, the delay value is phase
Machine shutter opening moment value t2；
Control controllable light source 19-1 carries out state switching and image shot by camera to be measured is opened to measure camera shutter to be measured
Open moment value t6Detailed process it is as follows：
First, control controllable light source 19-1 is set on state, the light that adjustment controllable light source 19-1 is sent is through graduation
Plate 15 has clear and legible pattern in the image that camera to be measured is shot after breaking up, then control controllable light source 19-1 is set to
Closed mode；
Then, while controlling camera to be measured to be taken pictures and made control controllable light source 19-1 carries out state switching, control
When controllable light source 19-1 carries out state switching, control controllable light source 19-1 switches to opening after delay by closing；
Then, check controllable light source 19-1 is sent in the image that camera to be measured is shot, observation image light through graticle 15
Pattern after differentiation in the picture, when occurring nothing in image, having pattern phenomenon, pre-estimation delay value, the delay value is phase
Machine shutter close moment value t6；
Step 3, passes through camera shutter start-up time value t to be measured2With shutter close moment value t6Exposed to calculate camera to be measured
Light delay value T,
The present invention is further detailed with reference to embodiment.
Embodiment：
Illustrated by taking digital zenith photography alignment system as an example, digital zenith photography alignment system is photogrammetric big
Typical case's application in ground astrofix measurement, is mainly used in the digital measurement of the accurate astrofix of ground point.Digital day top shot
Shadow alignment system has elimination personal and instrumental equation limitation, measurement accuracy is high, observation time is short, it is excellent to provide astronomical surveing result etc. in time
Point, creative realizes geodesic astronomy high-precision rapid survey.Digital zenith photography alignment system is minimum by ground survey station point
The zenith fixed star image moment survey station point zenith star place relationship match corresponding with star catalogue shot in visual field, so as to accurately calculate
Go out the astronomical longitude and latitude that Digital Zenith Camera rotates direction of principal axis.Obtain the high-precision measuring result of astronomical longitude, survey station point
The shooting time value of zenith fixed star image just must be very accurate.Accordingly, it is capable to the no digital zenith photography alignment system of accurate measure
In CCD camera exposure delay (CCD camera from receive photographing instruction to exposure intermediate time time delay), with regard to directly
Connect the measurement accuracy for determining survey station astronomical longitude.
As shown in Fig. 1-Figure 10, the camera machine that the exposure of the CCD camera in digital zenith photography alignment system is delayed is determined
Tool shutter time-delay mechanism, including electric supply installation 5, control and time keeping device 6, computer 10, the sum of trigger control device 11
Word Zenith Camera main frame 4, the optical telescope 4-3 of Digital Zenith Camera main frame 4 top, which is coaxially located by connecting, super remote
Away from tight shot 2, the top of super long distance tight shot 2 is coaxially connected with light source and focusing component 1, light source and focusing component 1
Material is the controllable light for irradiating graticle 15 in light tight material, light source and focusing component 1 provided with graticle 15 and from the top down
Source 19-1, controllable light source 19-1 are light emitting diode, and graticle 15 is provided with the division line of printing opacity, light source and the energy of focusing component 1
Enough adjustment controllable light source 19-1 and graticle 15 are synchronously moved up and down, and electric supply installation 5 is connected with control and time keeping device 6, are triggered
Control device 11 is all connected with controllable light source 19-1 and control and time keeping device 6, and computer is connected with control and time keeping device 6,
Control and time keeping device 6 are also connected with Digital Zenith Camera main frame 4, and computer 10 selects ruggedized computer.
As shown in Fig. 2-Fig. 7, light source and focusing component 1 include being used to light source and the stationary positioned of focusing component 1 being arranged on
Being located by connecting in the fixed seat 14 on the super top of long distance tight shot 2, fixed seat 14 has focusing component, controllable light source 19-1 and graduation
Plate 15 is arranged in focusing component；
The part being connected in fixed seat 14 with the top of super long distance tight shot 2 be arranged with for by fixed seat 14 with it is super remote
Circumferentially uniformly offered in the position for being arranged handle larynx hoop 25 in handle larynx hoop 25 away from the lock ring of tight shot 2, fixed seat 14
The telescopic chute 14-2 of some longitudinal directions；
Focusing component includes coupling seat 24, and coupling seat 24 is fixedly connected with the upper end of fixed seat 14, is connected in coupling seat 24
There is the focusing drum 17 that locking can be rotated and be capable of relative to coupling seat 24, the thread in inner cavity of focusing drum 17 is connected with mounting seat 21,
Mounting seat 21 and focusing drum 17 are coaxial, and the upper end of coupling seat 24 sets the lead 18 that promising mounting seat 21 is oriented to, controllable light source
19-1 and graticle 15 are fixedly mounted in mounting seat 21；
The bottom of mounting seat 21 is connected with the graduation panel seat 16 for installing graticle, graduation panel seat 16 and is threaded with
Trim ring 22 for compressing graticle 15, the upper end of trim ring 22 is connected with light source board 19, and controllable light source 19-1 is arranged on light source board
The center of 19 lower surfaces.
As shown in fig. 7, the upper surface of graticle 15 is provided with chromium coating 15-3, division line is engraved on chromium coating, division line
Including the symmetrically arranged some light transmission strip 15-1 of the spaced radial along graticle and several loopholes 15-2, light transmission strip 15-1
Residing diameter is mutually perpendicular to diameter residing for loophole 15-2；Light transmission strip 15-1 sets 24, and loophole 15-2 sets 25.
As shown in figure 8, the optical telescope 4-3 of Digital Zenith Camera main frame 4 top leads to super long distance tight shot 2
Connection component 3 is crossed coaxially to be located by connecting, connection component 3 include being used for optical telescope 4-3 top coordinating respectively position with
And coordinate the connector 3-1 of positioning and for by connector 3-1 and super long distance tight shot with the bottom of super long distance tight shot 2
The 2 locking handwheel 3-2 locked.
As shown in figure 12, trigger control device sends trigger signal of taking pictures (rising edge is effective), sets t1Moment value is 0.
Controllable light source is received after trigger signal, by T1(shutter opening delay) or T2(shutter close delay) light source state changes afterwards.
CCD camera receives trigger signal in t2Moment shutter starts to open, in t3Moment shutter is opened completely, in t4Moment shutter
Half, in t5Moment shutter is begun to shut off, in t6Moment shutter is completely closed.
The camera mechanical shutter that the present embodiment determines the exposure delay of the CCD camera in digital zenith photography alignment system exposes
The process of light delay comprises the following steps：
Step one, controllable light source 19-1 is opened；
Step 2, adjustment light source and focusing component 1, make the division line on graticle 15 straight and even, and in digital zenith photography
The clear shadow-free of division line in the image that instrument main frame 4 is shot；
Step 3, determines CCD camera shutter opening moment value t in Digital Zenith Camera main frame 42With CCD camera shutter
Close moment value t6；
Determine CCD camera shutter opening moment value t in Digital Zenith Camera main frame 42Detailed process it is as follows：
CCD camera is set to by low level triggering exposal model by computer and taken pictures, triggering control dress is set
Put and control controllable light source 19-1 states bright for length, set the initial millisecond number of delay of trigger control device as 15 to 25ms, press
The triggering shoot button of trigger control device, light source and focusing component controllable light source 19-1 switch to extinguishing by growing bright process delay,
Controllable light source 19-1 switchs to grow bright again after CCD camera is taken pictures；
Division line in the image that CCD camera is shot, observation image is checked, adjustment delay millisecond number is taken pictures, directly again
During to having in image captured by adjacent millisecond number, without division line phenomenon, pre-estimation delay value microsecond number simultaneously records now milli
Number of seconds, the i.e. delay value are exactly CCD camera shutter opening moment value t2；
Determine CCD camera shutter close moment value t in Digital Zenith Camera main frame 46Detailed process it is as follows：
Exposal model is triggered for low level by computer installation CCD camera and taken pictures, trigger control device is set
Control controllable light source 19-1 states to be gone out for length, set trigger control device and be delayed initial millisecond number as 520 to 620ms, press institute
Triggering shoot button is stated, the triggering shoot button of trigger control device is pressed, light source and focusing component controllable light source 19-1 are by growing
Go out and switch to light by delay, controllable light source 19-1 switchs to long go out again after CCD camera is taken pictures；
Division line in the image that CCD camera is shot, observation image is checked, adjustment delay millisecond number is taken pictures, directly again
During to having in image captured by adjacent millisecond number, without division line phenomenon, pre-estimation delay value microsecond number simultaneously records now milli
Number of seconds, the i.e. delay value are exactly the CCD camera shutter close moment value t6；
Step 4, the CCD camera shutter opening moment value t obtained by step 32With CCD camera shutter close moment value
t6CCD camera exposure delay value T is calculated,
As shown in figure 1, with reference to Figure 10, in the present embodiment, Digital Zenith Camera main frame 4 include instrument stringer 4-1,
Turntable and levelling device 4-2, optical telescope 4-3, the parts of CCD camera focus control 4-4 tetra-；
Instrument stringer 4-1 be used for instrument set up and outline leveling, to medium, including frame head, telescopic outrigger component, even
Connected components, circular bubble component, locking hand wheel component；
Turntable and levelling device are used for accurate leveling, rotation etc. during digital zenith photography positioning measurement, including foot screw group
Part, leveling component, transmission component, gyro black assembly etc.；
Optical telescope includes module of optical system, bubble tube component, inclinator component；
CCD camera focus control 4-4 is installed on optical telescope 4-3 end, optical telescope 4-3 optical axis and CCD
Camera imaging face is vertical, for position adjustments between section after optical telescope and CCD camera imaging surface.
Control and time keeping device 6 are used for digital zenith photography aligner measurements hardware controls and at time, image information
Reason, electric supply installation 5 provides power supply for digital zenith photography aligner measurements, and computer 10 is used for digital zenith photography and measured
Process control and data processing.
As shown in Figure 10, super long distance tight shot 2 is parallel for light source and the veiling glare that focusing component 1 is sent to be converted to
Light injects Digital Zenith Camera optical telescope, and then is presented on CCD camera imaging surface.
As shown in figure 8, with reference to Fig. 1 and Figure 10, connection component 3 of the invention includes connector 3-1 and locking handwheel 3-2,
Connector one end and the optical telescope camera lens front end of Digital Zenith Camera main frame 4 coordinate, and the other end focuses mirror with super long distance
First 2 front end coordinates, and forces to overlap for Digital Zenith Camera optical telescope optical axis and super long distance tight shot optical axis；Locking
Handwheel is used for the locking for surpassing long distance tight shot.
As shown in Fig. 2-Fig. 7, with reference to Fig. 1 and Figure 10, light source of the invention and focusing component 1 include controllable light source 19-1,
Controllable light source 19-1 is 1 high brightness LED, is welded on the center of light source board 19, by cable with being arranged on peace
The UNICOM of socket 20 on seat 21 is filled, the light source board 19 is arranged on the outer face of trim ring 22 by screw, trim ring 22 is an annular
Part, centre has a through hole to pass through light source, there is the first screw thread of circle 22-1 outside the trim ring 22, and the trim ring 22 passes through the
Graticle 15 is pressed in the first step hole 16-1 of graduation panel seat 16 by one screw thread, in the graticle 15 and graduation panel seat 16
Stepped hole location fit, the graticle 15 is overlapped with the axis of graduation panel seat 16, and there is a hole at the center of the graduation panel seat 16,
It can pass through the light through graticle 15, the graduation panel seat 16 and the stepped hole location fit of mounting seat 21, described point
Draw panel seat 16 to be connected with mounting seat 21 by screw, the mounting seat 21 has a Step Shaft 21-1, and the small end of Step Shaft is axially
Be carved with scale, there is a breach 21-2 at circle the second screw thread 21-3 and two at big end, 2 leads respectively with two at breach slide
Coordinate, the mounting seat screw thread and the screw-internal thread fit of focusing drum 17, the lead 18 are vertically mounted on the coupling seat
24 end faces so that the mounting seat 21 is only capable of realizing that axial movement can not rotate, and the cylindrical hole of focusing drum 17 is coupled with described
24 Step Shafts of seat coordinate, and have a ring annular groove 24-1, the focusing drum 17 end circle greatly on one end face of cylinder of coupling seat 24
There are 3 screwed holes on cylinder, wherein 2 are withstood in annular groove by cylindrical end positioning screw 24-2 respectively so that the focusing drum
Being only capable of rotation can not be axially moveable, and the coupling seat external cylindrical surface has a circle circular scale, and the focusing drum face of cylinder has one
Groove mark is alignd with circular scale, and a locking handwheel is provided with last screwed hole of the focusing drum, locks handwheel
23 front end cylinders are also stuck in the coupling seat annular groove, can make focusing drum 17 locked in any position by rotational lock handwheel
Put, the fixed seat 14 is fixed by location fit and by mode connects for screw with the coupling seat 24, described one end of fixed seat 14 has 1
Individual annular groove 14-1 and 4 telescopic chute 14-2, the handle larynx hoop 25 is installed in the annular groove 14-1 of fixed seat 14, rotary handle
Constantly larynx hoop is tightened up so that fixed seat 14 is fastened on super bayonet socket one end of long distance tight shot 2.The trigger control device includes 4
Charactron for display delayed millisecond value, 8 delay adjustment buttons, 1 light source conversion keys, 1 triggering shoot button etc.,
Taken pictures and light source state delays time to control for triggering CCD camera simultaneously.
Determine the preparation of the CCD camera exposure delay：The digital photography instrument main frame is set up as shown in Figure 1,
The light source and focusing component are connected to the super long distance tight shot bayonet socket end, the super long distance is focused with connection component
The camera lens other end is erected on the Digital Zenith Camera optical telescope camera lens, couples the electric supply installation with controlling and keeping
When device, connection camera power supply cable, camera data cable are respectively to the Digital Zenith Camera CCD camera focus control bottom
Portion and the control and time keeping device panel, couple the special image data cable two ends and control and keep to described respectively
When device side, ruggedized computer, connection camera control cable two ends are focused to the Digital Zenith Camera CCD camera respectively
Bottom of device, the trigger control device front end, connection light source control cable two ends are respectively to the light source and focus control, institute
State trigger control device front end.The control and time keeping device power switch are opened, switches the light source of the trigger control device
Conversion keys cause light source to be in bright state.CCD camera software of taking pictures is opened in the ruggedized computer to be clapped
According to, and check that software opens division line in shooting image, observation image with RAW format pictures；Unclamp the light source and focusing is filled
Handle larynx hoop is put, the light source and focus control is rotated to the differentiation straight and even rear set lever larynx hoop of line；Adjust the light source and tune
The focusing drum of coke installation so that break up the clear shadow-free of line in image.
Determine the CCD camera shutter opening moment value：The ruggedized computer CCD take pictures software design patterns for low level touch
Send out exposal model and click on and take pictures, set the trigger control device light source state bright for length, the setting trigger control device
Be delayed initial millisecond number (CCD camera is generally 15 to 25ms), presses the triggering shoot button, the light source and focusing
Device light source switchs to extinguishing by growing bright process delay, CCD camera after taking pictures the light source switch to grow again it is bright.Picture checks that software is beaten
Division line in shooting image, observation image is opened, appropriate adjustment delay millisecond number again taps on software triggering of taking pictures and takes pictures and press
The triggering shoot button, during up to being had in image captured by adjacent millisecond number, without division line phenomenon, pre-estimation delay value
Microsecond number and record now millisecond number, the i.e. delay value are exactly the CCD camera shutter opening moment value t2.
Determine the CCD camera shutter close moment value：The ruggedized computer CCD take pictures software design patterns for low level touch
Send out exposal model and click on and take pictures, set the trigger control device light source state to be gone out for length, the setting trigger control device
Be delayed initial millisecond number (CCD camera is generally 520 to 620ms), presses the triggering shoot button, the light source and tune
Coke installation light source is switched to light by long go out by delay, CCD camera after taking pictures the light source switch to grow again and go out.Picture checks software
Open division line in shooting image, observation image, appropriate adjustment delay millisecond number, again tap on software triggering of taking pictures take pictures and by
Under the triggering shoot button, until image captured by adjacent millisecond number in have, without division line phenomenon when, pre-estimation delay
Be worth microsecond number and record now millisecond number, the i.e. delay value are exactly the CCD camera shutter close moment value t6.
CCD camera exposure delay value is calculated：As shown in figure 12, the CCD camera exposure delay value T should be the CCD phases
Machine shutter opening and the half and CCD camera shutter opening moment value sum of close moment difference, i.e.,：
Determine device to determine in digital zenith photography alignment system by the camera mechanical shutter exposure delay of the present invention
CCD camera exposure delay beneficial effect be：
The precision of digital zenith photography positioning measurement survey station longitude is substantially increased, measurement efficiency is improved.Due to by CCD phases
The influence of machine shutter abrasion etc., interior during the camera shutter life-span, exposure delay will necessarily change, it is therefore necessary to periodically
It is measured, to ensure digital zenith photography positioning measurement precision.
The present invention is not used, digital zenith photography alignment system wants to obtain sufficiently high precision, just must be in known day
Multiple instrument status parameters demarcation is carried out on text point.System correspondence exposure delay is drawn by counter push away, then carries out astronomical surveing.Such as
This, it is extremely inefficient, and it is counter push away that the exposure delay time error drawn is larger, astronomical surveing error is big.
Using device of the present invention, the measure that the digital zenith photography alignment system of separate unit carries out multiexposure, multiple exposure delay is tried
Test and contrasted with Extrapolation value, as shown in table 1, table 1 is single camera exposure delay measured value to result of the test.
Table 1
Many number of units word zenith photography alignment systems are exposed respectively delay determination test and with Extrapolation value pair
Than as shown in table 2, table 2 is many camera exposure delay measured values to result of the test.
Table 2
By Experimental Comparison, the measure of the achievable high-precision exposure delay of the present invention.
Compared with prior art, the present invention has the advantages that：
, can be not to Digital Zenith Camera master when the device of the present invention is applied in digital zenith photography alignment system
On the basis of CCD camera is disassembled in machine, by light source, the high-precision parallel light tube of super long distance tight shot formation, digital day
Push up the optical telescope and CCD imaging device optical axis coincidences on photographic apparatus main frame, control and time keeping device and trigger control device
Control controllable light source state change to be taken pictures with triggering CCD camera simultaneously, by contrasting the image captured by different delayed time, analyze
It is worth at the time of going out CCD camera shutter opening, closing, and then calculates the exposure delay of CCD camera, therefore the present invention can be realized
Millisecond is carried out to CCD camera exposure delay accurately to determine, and accurately and reliably camera is provided for digital zenith photography positioning measurement
Exposure delay.
Further, the part being connected in fixed seat with the top of super long distance tight shot be arranged with for by fixed seat with
Circumferentially uniformly offered in the position for being arranged handle larynx hoop in the handle larynx hoop of super long distance tight shot lock ring, fixed seat some
The telescopic chute of bar longitudinal direction, when handle larynx band tightener, the external diameter for the position for opening up telescopic chute in fixed seat can reduce and be close to
The top of super long distance tight shot so that fixed seat reliably and is dismounted and easy to adjust with the fastening of super long distance tight shot, and
It ensure that the axiality of installation.
Claims (10)
1. the delay of camera mechanical shutter exposure determines device, it is characterised in that including being arranged on camera taking lens front end to be measured
Light tight housing (26), be provided with graticle (15) and controllable light source (19-1) in light tight housing, graticle (15) and can
Control light source (19-1) is arranged on the front of camera lens to be measured (27) and graticle (15) is in controllable light source (19-1) with treating
Survey between camera lens, closed between controllable light source (19-1) and camera lens to be measured, so that what controllable light source (19-1) was sent
Light enters in camera to be measured after only breaking up through graticle (15) to be imaged, and trigger control device is connected with controllable light source (19-1)
(11), trigger control device (11) and the camera of camera to be measured control port of taking pictures are connected, and trigger control device (11) is used to control
Make camera progress shutter opening to be measured or closing and controllable light source (19-1) carries out time-delay closing in shutter opening or closing
Or open.
2. camera mechanical shutter exposure delay according to claim 1 determines device, it is characterised in that the impermeable bare hull
Body is light source and focusing component, and controllable light source (19-1) and graticle (15) be arranged in light source and focusing component (1), light source with
The material of focusing component (1) is light tight material, and light source and focusing component (1) are arranged on camera lens front end to be measured, light source and
Focusing component (1) can adjust light source (19-1) and graticle (15) is synchronously moved up and down, to adjust graticle (15) to be measured
Being capable of blur-free imaging in camera.
3. camera mechanical shutter exposure delay according to claim 2 determines device, it is characterised in that the light source and tune
Tight shot is provided between burnt component (1) and camera lens front end to be measured, graticle (15) is arranged on the focus of tight shot
Position.
4. camera mechanical shutter exposure delay according to claim 1 determines device, it is characterised in that the camera to be measured
For CCD camera, control device is to be connected with computer (10) in control and time keeping device (6), control and time keeping device (6) and be
Control and the electric supply installation (5) of time keeping device (6) power supply, control and time keeping device (6) and camera to be measured and trigger control device
(11) connect.
5. camera mechanical shutter exposure delay according to claim 1 determines device, it is characterised in that the triggering control
Device (11) includes being connected with camera trigger signal interface, numeral method adjustment module, light source on single-chip microcomputer, single-chip microcomputer and referred to
Show and battery is connected with modulating signal interface, crystal oscillator and power supply module, power supply module, trigger control device (11) passes through
Camera trigger signal interface is connected with camera to be measured, is connected by light source and indicator lamp signaling interface with controllable light source (19-1).
6. camera mechanical shutter exposure delay according to claim 1 determines device, it is characterised in that the graticle
(15) it is impermeable tabula rasa, the division line for printing opacity is offered on graticle (15).
7. camera mechanical shutter exposure delay according to claim 6 determines device, it is characterised in that the graticle
(15) upper surface is provided with chromium coating, and division line is engraved on chromium coating, and division line includes symmetrical along the spaced radial of graticle
Some light transmission strips (15-1) set and several loopholes (15-2), diameter residing for light transmission strip (15-1) and loophole (15-
2) diameter is mutually perpendicular to residing for.
The assay method 8. camera mechanical shutter exposure is delayed, it is characterised in that comprise the following steps：
Step one, the delay time that control controllable light source (19-1) is opened and closed is set；
Step 2, control controllable light source (19-1) carry out state switching and image shot by camera to be measured are fast to measure camera to be measured
Door start-up time value t2And shutter close moment value t6；
Step 3, passes through camera shutter start-up time value t to be measured2With shutter close moment value t6Prolong to calculate camera exposure to be measured
Duration T,
The assay method 9. camera mechanical shutter exposure according to claim 8 is delayed, it is characterised in that the step 2
In, when control controllable light source (19-1) carry out state switching and image shot by camera to be measured are opened to measure camera shutter to be measured
Quarter value t2Detailed process it is as follows：
First, controllable light source (19-1) is set on state, the light that adjustment controllable light source (19-1) is sent is through graticle
(15) there is clear and legible pattern after breaking up in the image that camera to be measured is shot；
Then, while controlling camera to be measured to be taken pictures and controllable light source (19-1) progress state switching, controllable light source is controlled
When (19-1) carries out state switching, controllable light source (19-1) switches to closed mode after delay by unlatching；
Then, pattern of the light that controllable light source (19-1) is sent in observation image after graticle (15) differentiation in the picture, when
Had in image, pattern-free phenomenon when, pre-estimation delay value, the delay value is camera shutter start-up time value t2。
The assay method 10. camera mechanical shutter exposure according to claim 8 is delayed, it is characterised in that the step 2
In, when control controllable light source (19-1) carry out state switching and image shot by camera to be measured are opened to measure camera shutter to be measured
Quarter value t6Detailed process it is as follows：
First, controllable light source (19-1) is set on state, the light that adjustment controllable light source (19-1) is sent is through graticle
(15) there is clear and legible pattern after breaking up in the image that camera to be measured is shot, then controllable light source (19-1) is set to off
Closed state；
Then, while controlling camera to be measured to be taken pictures and controllable light source (19-1) progress state switching, controllable light source (19-
1) when carrying out state switching, controllable light source (19-1) switches to opening after delay by closing；
Then, pattern of the light that controllable light source (19-1) is sent in observation image after graticle (15) differentiation in the picture, when
When occurring nothing in image, having pattern phenomenon, pre-estimation delay value, the delay value is camera shutter close moment value t6。
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| CN110971892A (en) * | 2019-11-27 | 2020-04-07 | 深圳市派科斯科技有限公司 | Exposure delay measuring method, device and storage medium |
| CN111093021A (en) * | 2018-10-23 | 2020-05-01 | 光速视觉（北京）科技有限公司 | Time domain synchronization method of camera |
| CN111355947A (en) * | 2018-12-24 | 2020-06-30 | 清华大学 | Method for measuring starting time of camera |
| CN112584132A (en) * | 2019-09-29 | 2021-03-30 | 深圳市光鉴科技有限公司 | Device and method for measuring delay time between cameras in different wave bands |
| CN113438473A (en) * | 2021-06-25 | 2021-09-24 | 广州极飞科技股份有限公司 | Method and device for testing camera shutter lag time and terminal equipment |
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| CN113438473A (en) * | 2021-06-25 | 2021-09-24 | 广州极飞科技股份有限公司 | Method and device for testing camera shutter lag time and terminal equipment |
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