CN102853998A - Variable pitch dynamic goal simulating system and using method thereof - Google Patents
Variable pitch dynamic goal simulating system and using method thereof Download PDFInfo
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Abstract
The invention discloses a variable pitch dynamic goal simulating system and using method of the variable pitch dynamic goal simulating system, belonging to the field of the optical imaging resolution ratio detection. The system comprises a light source, a resolution ratio rotary drum, a parallel light pipe, a linear displacement device, a grating ruler and a rotary drum rotating shaft; the light emitted by the light source is irradiated on the resolution ratio rotary drum, the rotary drum rotating shaft drives the resolution ratio rotary drum to rotate and generate a dynamic goal; by using the linear displacement device, the position of the resolution ratio rotary drum relative to a focal plane of the parallel light pipe is adjusted, the position movement amount is accurately measured by the grating ruler; the shooting distance of simulating the dynamic goal is calculated; and a ground dynamic goal of an aerial camera is simulated under a certain flying height. By using the linear displacement device, the dynamic goal of the simple linear movement and the parallel light pipe are combined to form a set of simulating systems capable of generating the dynamic goals with different shooting distances; and the imaging ability index of the dynamic goals at different movement speeds can be detected under the condition of different shooting distances of the aerial camera.
Description
Technical field
The invention belongs to optical imagery resolution detection field, relate to a kind of displacement dynamic object simulation system and using method thereof, it is that a kind of optics dynamic object that the photograph distance of variation can be provided is realized system and detection method thereof that dynamic resolution of aerial camera is detected.
Background technology
Dynamic resolution to aerial camera detects, and the way that normally adopts outer field aerial school to fly is in the past taken the dynamic resolution that the ground target image detects aerial camera with aerial camera aboard, and this method cost is high, the cycle is long.So aerial camera is carried out the laboratory dynamic resolution detect and just become a kind of trend indoor.
According to the work characteristics of aerial camera, the imaging index and the image-forming condition that need to detect comprise the imaging working index under target, different temperatures and the air pressure conditions of moving target, different photograph distances etc.The dynamic object equipment of the produced moving target that can find at present has two kinds, a kind of be Zhou Xingyi etc. patent " dynamic target generator " (ZL200820071670.2) and article " design of CCD camera dynamic transfer function core the testing apparatus " (optical technology of He Xu etc., 2010Vol.36, No.3) the middle rotary drum dynamic target generator that adopts; A kind of is the resolution chi formula dynamic target generator that adopts in the brave patent " system for detecting dynamic resolution of aerial camera " (application number 200810050576.3) that waits of peace will.The rotary drum dynamic target generator that Zhou Xingyi and He Xu etc. adopt is engraved in the resolving power test target pattern of GB on the face of cylinder of cylindrical rotary drum, utilizes the rotary drum rotational motion to produce dynamic object; Peace will bravely waits the resolution chi formula dynamic target generator that adopts, and the resolving power test target pattern of GB is engraved on the plane of resolution chi, utilizes the rectilinear motion generation dynamic object of resolution chi.These two kinds of dynamic target generators all are that the resolving power test target pattern of dynamic target generator is demarcated on the focal plane of parallel light tube in use, and the resolving power test target pattern moves along the direction perpendicular to the parallel light tube optical axis, thereby simulates the dynamic object of unlimited distance.
But, these present two kinds of dynamic object analog machines all can only simulate the dynamic object of infinite distance, if want to simulate the dynamic object of distance variable, then need moving parallel light pipe or dynamic goal simulator, done like this shortcomings, the one, be inconvenient to operate, the 2nd, the registration that needs after moving to readjust the two concerns, the 3rd, adjust between rear parallel light tube and the target resolution plate pattern apart from can not accurately measuring, so can not give the actual range of dynamic object.
Summary of the invention
The problem that can only simulate the dynamic object of infinity and can not provide the actual range of dynamic object in order to solve prior art, the invention provides a kind of displacement dynamic object simulation system and using method thereof, it can provide the optics dynamic object that changes the photograph distance to realize detection to dynamic resolution of aerial camera, and distance can accurately provide.
The technical scheme that technical solution problem of the present invention is taked is as follows:
A kind of scheme is to adopt the system schema of rotary drum dynamic target generator: displacement dynamic object simulation system comprises light source assembly, resolution rotary drum, parallel light tube, linear displacement device, grating scale and rotary drum rotation axis system; On the extended line that is centered close to the parallel light tube optical axis of resolution rotary drum, the parallel light tube optical axis is perpendicular to the tangential direction of resolution rotary drum, and on optical axis direction, the striped of resolution rotary drum delineation face overlaps with the focal plane of parallel light tube; The irradiation that light source assembly sends is on the resolution rotary drum, and the rotary drum rotation axis system drives the resolution drum rotating, produces dynamic object; Resolution rotary drum and rotary drum rotation axis system are installed on the table top of linear displacement device, and can carry out rectilinear motion along the optical axis direction of parallel light tube with linear displacement device, its rectilinear motion shift length calculates the photograph distance of the dynamic object of simulation by optical grating ruler measurement according to the shift value of optical grating ruler measurement.
The using method of above-mentioned displacement dynamic object simulation system comprises the steps:
1) with the optical axis coincidence of aerial camera and parallel light tube, the center of resolution rotary drum is adjusted on the extended line of aerial camera and the common optical axis of parallel light tube, adjust linear displacement device, the resolution pattern delineation face of resolution rotary drum is adjusted on the focal plane of parallel light tube, numerical value zero setting with displacement of the lines digital display case simulates the infinity target;
2) control system drives the rotary drum rotation axis system and drives the resolution drum rotating, produces dynamic object, and the control aerial camera carries out resolution to the infinity dynamic object and detects target imaging;
3) adjust linear displacement device, make the resolution rotary drum to parallel light tube one side shifting apart from l, according to formula H=f
2 Light pipe/ l calculates the target range H that simulates this moment, wherein f
Light pipeFocal length for parallel light tube;
4) the control aerial camera is to target imaging, and the dynamic object for H of adjusting the distance carries out dynamic resolution and detects;
5) repeating step 3) and step 4), adjust many groups apart from the l value, obtain different photograph distance H, obtaining aerial camera takes a picture apart from the situation in difference, to the image that dynamic resolution plate target becomes, personnel judge camera dynamic object resolution testing result under difference photograph distance condition after testing.
Another kind of scheme is to adopt the system schema of resolution chi formula dynamic target generator: displacement dynamic object simulation system comprises light source assembly, resolution chi, parallel light tube, linear displacement device, grating scale and resolution chi translation mechanism; The delineation plane of resolution chi is perpendicular to the parallel light tube optical axis, and the striped of resolution chi delineation face overlaps with the focal plane of parallel light tube; The irradiation that light source assembly sends is on the resolution chi, and resolution chi translation mechanism drives the resolution chi and carries out rectilinear motion along the optical axis direction perpendicular to parallel light tube, produces dynamic object; Resolution chi and resolution chi translation mechanism are installed on the table top of linear displacement device, and can carry out rectilinear motion along the optical axis direction of parallel light tube with linear displacement device, its rectilinear motion shift length calculates the photograph distance of the dynamic object of simulating by optical grating ruler measurement according to the shift value of optical grating ruler measurement.
The using method of above-mentioned displacement dynamic object simulation system comprises the steps:
1) with the optical axis coincidence of aerial camera and parallel light tube, the striped of resolution chi is delineated face perpendicular to the optical axis of parallel light tube, adjust linear displacement device, the striped delineation face of resolution chi is adjusted on the focal plane of parallel light tube, numerical value zero setting with displacement of the lines digital display case simulates the infinity target;
2) control system driving resolution chi translation mechanism drive resolution chi carries out rectilinear motion along the optical axis direction perpendicular to parallel light tube, produces dynamic object, and the control aerial camera carries out the resolution detection to target imaging to the infinity dynamic object;
3) adjust linear displacement device, make the resolution chi to parallel light tube one side shifting apart from l, according to formula H=f
2 Light pipe/ l calculates the target range H that simulates this moment, wherein f
Light pipeFocal length for parallel light tube;
4) the control aerial camera is to target imaging, and the dynamic object for H of adjusting the distance carries out dynamic resolution and detects;
5) repeating step 3) and step 4), adjust many groups apart from the l value, obtain different photograph distance H, obtaining aerial camera takes a picture apart from the situation in difference, to the image that dynamic resolution plate target becomes, personnel judge camera dynamic object resolution testing result under difference photograph distance condition after testing.
The invention has the beneficial effects as follows: utilize linear displacement device that simple traveling priority dynamic object and parallel light tube are combined and form the simulation system that a cover can produce the dynamic object of different photograph distances, can the imaging capability index of the dynamic object of the different motion speed under the different photographic altitude conditions of aerial camera be detected, linear displacement device is when demarcating zero-bit, can simulate the dynamic object of infinity, adjust linear displacement device, then can change the photograph distance of dynamic object, taking a picture provides apart from calculating behind the amount of movement of accurately being measured linear displacement device by grating scale.
Description of drawings
Fig. 1 adopts the resolution rotary drum that the displacement dynamic object simulation system structural representation of moving target is provided;
Fig. 2 adopts the resolution chi that the displacement dynamic object simulation system structural representation of moving target is provided.
Fig. 3 is the instrument layout synoptic diagram that adopts the displacement dynamic object simulation system detection dynamic resolution of aerial camera of resolution rotary drum;
Fig. 4 is the vertical view of Fig. 3.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in further details.
As shown in Figure 1, displacement dynamic object simulation system of the present invention comprises light source assembly 1, resolution rotary drum 2, parallel light tube 3, linear displacement device 4, grating scale 5 and rotary drum rotation axis system 6; Light source assembly 1 is thrown light on resolution rotary drum 2 uniformly, is carved with the resolving power test target of national standard on the resolution rotary drum 2, and is different according to operating position, can select the resolving power test target candy strip A1 ~ A7 of different plates of GB number; On the extended line that is centered close to parallel light tube 3 optical axises of resolution rotary drum 2, the optical axis of parallel light tube 3 is perpendicular to the tangential direction of resolution rotary drum 2, and on optical axis direction, the striped of resolution rotary drum 2 delineation face overlaps with the focal plane of parallel light tube 3; The irradiation that light source assembly 1 sends is on resolution rotary drum 2, and rotary drum rotation axis system 6 drives 2 rotations of resolution rotary drum, produces dynamic object; Resolution rotary drum 2 and rotary drum rotation axis system 6 are installed on the table top of linear displacement device 4, utilize linear displacement device 4 to adjust resolution rotary drum 2 with respect to the position of parallel light tube 3 focal planes, and by grating scale 5 the position movement amount is accurately measured, calculate the photograph distance of dynamic object simulation, the ground dynamic object of simulation aerial camera under certain flying height.
As shown in Figure 2, displacement dynamic object simulation system of the present invention comprises light source assembly 1, resolution chi 7, parallel light tube 3, linear displacement device 4, grating scale 5 and resolution chi translation mechanism 8; Light source assembly 1 is thrown light on resolution chi 7 uniformly, be carved with the resolving power test target of national standard on the resolution chi 7, different according to operating position, can select the resolving power test target candy strip of different plates of GB number, also can delineate the resolution candy strip of plurality of plate number; The delineation plane of resolution chi 7 is perpendicular to parallel light tube 3 optical axises, and the striped of resolution chi 7 delineation face overlaps with the focal plane of parallel light tube 3; The irradiation that light source assembly 1 sends is on resolution chi 7, and resolution chi translation mechanism 8 drives resolution chi 7 and carries out rectilinear motion along the optical axis direction perpendicular to parallel light tube 3, produces dynamic object, and dynamic object forms the infinity dynamic object through parallel light tube 3; Resolution chi 7 and resolution chi translation mechanism 8 are installed on the table top of linear displacement device 4, utilize linear displacement device 4 to adjust resolution chi 7 with respect to the position of parallel light tube 3 focal planes, and by grating scale 5 the position movement amount is accurately measured, calculate the photograph distance of dynamic object simulation, the ground dynamic object of simulation aerial camera under certain flying height.
As shown in Figure 3 and Figure 4, the optical axis coincidence of parallel light tube 3 and camera 10, the optical axis of parallel light tube 3 is perpendicular to the tangential direction of resolution rotary drum 2.Resolution rotary drum 2 is with the speed rotation of rotary drum rotation axis system 6 to set, resolution rotary drum 2 and rotary drum rotation axis system 6 are installed on the table top of linear displacement device 4, they can carry out rectilinear motion along the optical axis direction of parallel light tube 3 with linear displacement device 4, its straight-line shift length is measured by grating scale 5, shown by displacement of the lines digital display case 9, calculate the photograph distance of the dynamic object of simulation according to the shift value of grating scale 5 measurements.The 10 photograph work of control camera to the dynamic object imaging of specific photograph distance, are carried out the imaging resolution index and are detected.
Adopt resolution rotary drum displacement dynamic object simulation system of the present invention as follows apart from the detection method of dynamic object imaging resolution index to the different photograph of aerial camera:
1) with the optical axis coincidence of aerial camera 10 with parallel light tube 3, the center of resolution rotary drum 2 is adjusted on the extended line of aerial camera 10 and parallel light tube 3 common optical axises, adjust linear displacement device 4, the resolution pattern delineation face of resolution rotary drum 2 is adjusted on the focal plane of parallel light tube 3, numerical value zero setting with displacement of the lines digital display case 9, at this moment, the target that simulates is the infinity target;
2) control system drives rotary drum rotation axis system 6 and drives 2 rotations of resolution rotary drum, produces dynamic object, and 10 pairs of target imagings of control aerial camera carry out resolution to the infinity dynamic object and detect;
3) adjust linear displacement device 4, make target resolution rotary drum 2 to parallel light tube 3 one side shiftings apart from l, according to formula H=f
2 Light pipe/ l calculates the target range H that simulates this moment, wherein f
Light pipeFocal length for parallel light tube 3;
4) control aerial camera 10 pairs of target imagings, the dynamic object for H of adjusting the distance carries out dynamic resolution and detects;
5) by that analogy, adjust many groups apart from the l value, can obtain different photograph distance H, can obtain aerial camera takes a picture apart from the situation in difference, to the image that dynamic resolution plate target becomes, personnel judge camera dynamic object resolution testing result under difference photograph distance condition after testing.
In addition, change the velocity of rotation of resolution rotary drum 2 or the translational speed of change resolution chi 7, combine from the setting of different photograph distance, just can the imaging resolution index of the dynamic object of the different motion speed of aerial camera under difference photograph distance condition be detected.
Claims (4)
1. displacement dynamic object simulation system is characterized in that, this system comprises light source assembly (1), resolution rotary drum (2), parallel light tube (3), linear displacement device (4), grating scale (5) and rotary drum rotation axis system (6); On the extended line that is centered close to parallel light tube (3) optical axis of resolution rotary drum (2), the tangential direction of parallel light tube (3) optical axis vertical resolution rotary drum (2), on optical axis direction, the striped of resolution rotary drum (2) delineation face overlaps with the focal plane of parallel light tube (3); The irradiation that light source assembly (1) sends is on resolution rotary drum (2), and rotary drum rotation axis system (6) drives resolution rotary drum (2) rotation, produces dynamic object; Resolution rotary drum (2) and rotary drum rotation axis system (6) are installed on the table top of linear displacement device (4), and can carry out rectilinear motion along the optical axis direction of parallel light tube (3) with linear displacement device (4), its rectilinear motion shift length is measured by grating scale (5), calculates the photograph distance of the dynamic object of simulating according to the shift value of grating scale (5) measurement.
2. the using method of displacement dynamic object simulation system as claimed in claim 1 is characterized in that the method comprises the steps:
1) with the optical axis coincidence of aerial camera (10) with parallel light tube (3), the center of resolution rotary drum (2) is adjusted on the extended line of aerial camera (10) and the common optical axis of parallel light tube (3), adjust linear displacement device (4), the resolution pattern delineation face of resolution rotary drum (2) is adjusted on the focal plane of parallel light tube (3), numerical value zero setting with displacement of the lines digital display case (9) simulates the infinity target;
2) control system drives rotary drum rotation axis system (6) and drives resolution rotary drum (2) rotation, produces dynamic object, and control aerial camera (10) carries out resolution to the infinity dynamic object and detects target imaging;
3) adjust linear displacement device (4), make resolution rotary drum (2) to parallel light tube (3) one side shiftings apart from l, according to formula H=f
2 Light pipe/ l calculates the target range H that simulates this moment, wherein f
Light pipeFocal length for parallel light tube (3);
4) control aerial camera (10) is to target imaging, and the dynamic object for H of adjusting the distance carries out dynamic resolution and detects;
5) repeating step 3) and step 4), adjust many groups apart from the l value, obtain different photograph distance H, obtaining aerial camera takes a picture apart from the situation in difference, to the image that dynamic resolution plate target becomes, personnel judge camera dynamic object resolution testing result under difference photograph distance condition after testing.
3. displacement dynamic object simulation system is characterized in that, this system comprises light source assembly (1), resolution chi (7), parallel light tube (3), linear displacement device (4), grating scale (5) and resolution chi translation mechanism (8); The delineation plane of resolution chi (7) is perpendicular to parallel light tube (3) optical axis, and the striped of resolution chi (7) delineation face overlaps with the focal plane of parallel light tube (3); The irradiation that light source assembly (1) sends is on resolution chi (7), and resolution chi translation mechanism (8) drives resolution chi (7) and carries out rectilinear motion along the optical axis direction perpendicular to parallel light tube (3), produces dynamic object; Resolution chi (7) and resolution chi translation mechanism (8) are installed on the table top of linear displacement device (4), and can carry out rectilinear motion along the optical axis direction of parallel light tube (3) with linear displacement device (4), its rectilinear motion shift length is measured by grating scale (5), calculates the photograph distance of the dynamic object of simulating according to the shift value of grating scale (5) measurement.
4. the using method of displacement dynamic object simulation system as claimed in claim 3 is characterized in that the method comprises the steps:
1) with the optical axis coincidence of aerial camera (10) with parallel light tube (3), the striped of resolution chi (7) is delineated face perpendicular to the optical axis of parallel light tube (3), adjust linear displacement device (4), the striped delineation face of resolution chi (7) is adjusted on the focal plane of parallel light tube (3), numerical value zero setting with displacement of the lines digital display case (9) simulates the infinity target;
2) control system driving resolution chi translation mechanism (8) drive resolution chi (7) carries out rectilinear motion along the optical axis direction perpendicular to parallel light tube (3), produce dynamic object, control aerial camera (10) carries out resolution to the infinity dynamic object and detects target imaging;
3) adjust linear displacement device (4), make resolution chi (7) to parallel light tube (3) one side shiftings apart from l, according to formula H=f
2 Light pipe/ l calculates the target range H that simulates this moment, wherein f
Light pipeFocal length for parallel light tube (3);
4) control aerial camera (10) is to target imaging, and the dynamic object for H of adjusting the distance carries out dynamic resolution and detects;
5) repeating step 3) and step 4), adjust many groups apart from the l value, obtain different photograph distance H, obtaining aerial camera takes a picture apart from the situation in difference, to the image that dynamic resolution plate target becomes, personnel judge camera dynamic object resolution testing result under difference photograph distance condition after testing.
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| CN103278934A (en) * | 2013-05-31 | 2013-09-04 | 中国科学院西安光学精密机械研究所 | Focal plane butt joint device and method for satellite-borne optical remote sensor |
| CN104061947A (en) * | 2014-07-14 | 2014-09-24 | 中国科学院光电研究院 | Dynamic target simulation system |
| CN104865848A (en) * | 2015-06-05 | 2015-08-26 | 吉林大学 | Dynamic object generation system for aviation spectral camera |
| CN106060535A (en) * | 2016-07-07 | 2016-10-26 | 西安应用光学研究所 | Television camera performance detector capable of simulating imaging characteristics of external field target |
| CN107314889A (en) * | 2017-08-07 | 2017-11-03 | 中山依瓦塔光学有限公司 | Become the display precise parallel light tube as simulated range |
| CN107504982A (en) * | 2017-08-22 | 2017-12-22 | 中国科学院长春光学精密机械与物理研究所 | Aerial camera Imaging Simulation system over the ground |
| CN107655495A (en) * | 2017-09-22 | 2018-02-02 | 公安部第三研究所 | Unmanned plane differentiates force checking device and method with video camera |
| CN108020871A (en) * | 2017-12-11 | 2018-05-11 | 中国科学院长春光学精密机械与物理研究所 | aerial camera infrared imaging device dynamic imaging quality test device and test method |
| CN109632267A (en) * | 2018-12-06 | 2019-04-16 | 中国科学院长春光学精密机械与物理研究所 | A kind of dynamic optical target simulator and dynamic imaging test equipment and method |
| CN112526746A (en) * | 2020-12-05 | 2021-03-19 | 中国人民解放军国防科技大学 | Simulation system and method for targets with different distances |
| CN113281014A (en) * | 2021-05-31 | 2021-08-20 | 中科院南京耐尔思光电仪器有限公司 | Dynamic scene simulation system and method for space camera test |
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| CN107655495A (en) * | 2017-09-22 | 2018-02-02 | 公安部第三研究所 | Unmanned plane differentiates force checking device and method with video camera |
| CN108020871A (en) * | 2017-12-11 | 2018-05-11 | 中国科学院长春光学精密机械与物理研究所 | aerial camera infrared imaging device dynamic imaging quality test device and test method |
| CN109632267A (en) * | 2018-12-06 | 2019-04-16 | 中国科学院长春光学精密机械与物理研究所 | A kind of dynamic optical target simulator and dynamic imaging test equipment and method |
| CN112526746A (en) * | 2020-12-05 | 2021-03-19 | 中国人民解放军国防科技大学 | Simulation system and method for targets with different distances |
| CN113281014A (en) * | 2021-05-31 | 2021-08-20 | 中科院南京耐尔思光电仪器有限公司 | Dynamic scene simulation system and method for space camera test |
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