CN201173855Y - dynamic target generator - Google Patents

Abstract

The utility model relates to a dynamic target generator, which adopts the technical scheme: the drift angle rotating workbench is placed on the workbench, and its rotating shaft is dynamically matched with the round hole on the workbench; the precision turntable is fixed on the drift angle turntable Above; the dynamic target drum is fixed on the precision turntable, and a plurality of target plates are fixed on the circumferential surface of the dynamic target drum; the deflection mirror is located on the axis of the deflection angle rotating table, and its position is fixed, and the first reflector It is fixed on the central axis of the deflection angle rotating table; the light from the light source is irradiated on the target plate, and the target plate is reflected by the first reflector and then imaged on the deflection mirror. The utility model can simulate a dynamic infinite high-precision target, provide a forward moving target for the dynamic photographic detection of the aerial camera, and at the same time realize the bias flow action of the target, realize the dynamic resolution detection of the aerial camera in the laboratory, and greatly improve the The development and testing expenses are saved, the work efficiency is improved, and the development period is shortened.

Description

dynamic target generator

technical field

The utility model relates to a dynamic target generator, in particular to a long-distance target formed with a collimator to simulate ground objects to be photographed by an aerial camera at different flying heights and speeds, and to realize dynamic resolution detection of the aerial camera.

Background technique

At present, the detection of the dynamic resolution of the aerial camera is mainly through the method of flying in the external factory, laying targets on the ground, flying on the plane to take images of the ground targets, and returning to the ground by detecting the aerial images taken during the flight. Check the dynamic photography resolution of the aerial camera. This approach has several disadvantages:

1) The cost is high. The cost of each flight sortie is about tens of thousands of dollars, and at least a few or even a dozen sorties are required for one inspection, which will inevitably greatly increase the inspection cost and development cost of aerial cameras.

2) The cycle is long. Since the number of flights is greatly affected by the route and climate environment, the time of each flight cannot be determined in advance. It must be determined at any time according to the route and climate environment at that time. This will greatly prolong the detection cycle of aerial cameras and reduce work efficiency.

Contents of the invention

The technical problem to be solved by the utility model is to provide a dynamic target generator; the dynamic target generator can generate forward image movement and drift motion, and simulate the ground scene relative to the aerial camera, so that the aerial camera in the laboratory can be realized. dynamic resolution detection.

The dynamic target generator of the present utility model comprises a light source, a dynamic target drum, a first reflector, a bias mirror, a precision turntable, a drift angle rotating workbench, and a workbench; the drift angle turntable is placed on the workbench, and its rotating shaft It is dynamically matched with the round hole on the workbench; the precision turntable is fixed on the drift angle rotating worktable, and its axis deviates from the axis of the drift angle turntable; the dynamic target drum and light source are fixed on the precision turntable, and the circumference of the dynamic target drum There are multiple target plates fixed on the surface; the deflection mirror is located on the axis of the deflection angle rotating table, and its position is fixed, and the first reflector is fixed on the central axis of the deflection angle rotating table; On the board, the target plate is imaged on the deflector mirror after being reflected by the first reflector.

The light emitted by the light source is irradiated on the target plate on the circumference of the dynamic target drum, so that the target plate is reflected by the first reflector and then imaged on the deflector mirror. When the dynamic target drum rotates with the precision turntable, the target plate moves circumferentially along the circumference of the dynamic target drum, and the image formed on the deflection mirror is imaged on the receiving surface of the detection device through the collimator. At this time, the target board can simulate the ground scene to be photographed when the aircraft is flying forward; the drift angle rotation table rotates, driving the precision turntable and the first reflector to swing within a certain rotation angle range, and the dynamic target drum and light source follow the precision turntable Swing together within a certain range of rotation angle; since the deflection mirror is fixed, the moving direction of the image formed by the target plate on the receiving surface of the detection device after being reflected by the deflection mirror turns over a certain angle, which can simulate the forward flight of the aircraft under the action of airflow The ground scene to be photographed.

The utility model can simulate a dynamic infinite high-precision target, and the target is located on the focal plane of a reflective collimator with a focal length of 4m, which provides a forward moving target for the dynamic photographic detection of the aerial camera, and can realize the target at the same time The bias current action makes the infinite distance high-precision target produce the bias current effect. The utility model provides a multifunctional dynamic target for the detection of the aerial camera, and realizes the dynamic resolution detection of the aerial camera in the laboratory; on the one hand, it can accurately detect the dynamic photography resolution of the aerial camera; Save development and inspection funds, greatly improve the work efficiency of the final assembly inspection stage, shorten the development cycle, find problems early, and ensure that good photos and images are obtained in the field calibration flight test.

The worktable is located on the linear guide rail; the worktable can move on the linear guide rail, so that the image formed by the target plate on the deflector mirror is located on the focal plane of the collimator.

The light source includes a point light source, a condenser, and a filter; the light emitted by the point light source is converted into convergent light by the condenser, and the convergent light is irradiated on the target plate on the circumferential surface of the dynamic target drum after being homogenized by the filter .

The light emitted by the point light source passes through the condenser and becomes converging light, which can make the energy of the light converge at one point; and the converging light can get uniform light with appropriate illumination through the filter. In this way, the target board can be irradiated with uniform light with high energy and suitable illuminance, so that the receiving surface of the detection device can obtain a clear image of the target board.

A heat insulating sheet may also be included between the point light source and the condenser mirror to isolate the heat energy emitted by the point light source; a spherical reflector is also placed on the opposite side of the point light source to the heat insulating sheet for converting the point light source Energy converges into a single point.

A reflective mirror group may also be included between the optical filter and the target plate; the convergent light homogenized by the optical filter is changed in direction by the reflective mirror group and irradiated on the target plate.

The reflective mirror group includes a second reflective mirror and a third reflective mirror; the converged light homogenized by the filter is reflected by the second reflective mirror and the third reflective mirror and then irradiates on the target plate.

The utility model is described in further detail below in conjunction with accompanying drawing and specific embodiment.

Description of drawings

Fig. 1 is the structural representation of the utility model. In the figure, 1 dynamic target drum, 2 deflection mirror, 3 first reflector, 4 precision turntable, 5 deflection angle rotating table, 6 workbench, 7 point light source, 8 condenser, 9 optical filter, 10 second reflector , 11 third mirrors, 12 spherical mirrors, 13 heat shields, 14 support seats.

Detailed ways

As shown in Figure 1, the dynamic target generator of the present utility model comprises a light source, a dynamic target drum 1, a deflection mirror 2, a first reflector 3, a precision turntable 4, a deflection angle rotating table 5, and a workbench 6.

Described light source comprises point light source 7, condenser mirror 8, optical filter 9; The angle between the normal line of the second reflector 10 and the optical axis is 45 degrees, and the spherical reflector 12, the point light source 7, the heat shield 13, the condenser lens 8, the optical filter 9 and the second reflector 10 are fixedly installed In a shell, the shell is fixed on the dynamic target drum 1 and can rotate with the dynamic target drum 1; the third reflector 11 is fixedly installed in the dynamic target drum 1 and can rotate with the dynamic target drum 1, and The third reflector 11 is located on the reflection optical path of the second reflector 10 , and the second reflector 10 and the third reflector 11 are placed in parallel.

The dynamic target drum 1 is circular, and the target plate for detection is made on the outer circumferential curved surface of the circular drum, and the dynamic target drum 1 is fixed on the precision turntable.

The light emitted by the point light source 7 is converged by the spherical reflector 12 and the condenser lens 8, and after being insulated by the heat shield 13 and homogenized by the filter 9, the direction is changed by the second reflector 10 and the third reflector 11, and the light is irradiated on the target. board.

The precision turntable 4 is located on the support base 14, and the bottom end of the support base 14 is welded together with the upper surface of the drift angle rotary workbench 5, and the rotation axis of the precision turntable 4 is fixed to the shaft of the DC torque motor fixed in the support base 14. connect. The precision turntable 4 is driven to rotate by a DC torque motor. The precision turntable 4 is driven by a motor and can realize constant speed, variable speed, sinusoidal and other motions.

The drift angle rotating workbench 5 is placed on the workbench 6, and its rotation shaft and the through hole on the workbench 6 are dynamically matched through the non-standard dense bead rolling shaft system, and the rotation axis is connected with the shaft of the DC torque motor; the drift angle rotation The workbench 5 is driven by a DC torque motor and can swing within an angle of 90 degrees.

The workbench 6 is supported by rollers and placed on the linear guide rail, and can be driven by a motor to move on the linear guide rail, so that the image formed by the target plate on the deflector mirror is located on the focal plane of the collimator.

The dynamic target generator is generally placed next to the collimator with a focal length of 4m, on the focal plane of the collimator, and the detected camera is placed at the light outlet of the light tube. After being collimated by the collimator, the target plate on the dynamic target drum 1 becomes an infinite target relative to the camera lens under test. When the dynamic target drum 1 is perpendicular to the optical axis and rotates with a certain rule, the dynamic target plate can simulate a dynamic simulation target at a certain distance relative to the camera lens under test.

Claims (6)

1, a kind of dynamic object generator is characterized in that comprising light source, dynamic object rotary drum (1), first catoptron (3), bias current mirror (2), precise rotating platform (4), drift angle rotary work-table (5), worktable (6); Drift angle rotary work-table (5) places on the worktable (6), and the circular hole on its rotation axis and the worktable (6) movingly; Precise rotating platform (4) is fixed on the drift angle rotary work-table (5), the axis of its axis runout drift angle rotary work-table (5); Dynamic object rotary drum (1) is fixed on the precise rotating platform (4), and is fixed with a plurality of Target Boards on dynamic object rotary drum (1) periphery; Bias current mirror (2) is positioned on the axis of drift angle rotary work-table (5), and its stationkeeping is motionless, and first catoptron (3) is fixed on the central shaft of drift angle rotary work-table (5); The irradiate light of light source is on Target Board, and Target Board images on the bias current mirror (2) after first catoptron (3) reflection.

2, dynamic object generator according to claim 1 is characterized in that described worktable (6) is positioned on the line slideway.

3, dynamic object generator according to claim 1 is characterized in that described light source comprises pointolite (7), condenser (8), optical filter (9); The light that pointolite (7) sends is converted to converging light through condenser (8), and this converging light is radiated at behind the even light of mating plate (9) on the Target Board on dynamic object rotary drum (1) periphery more after filtration.

4, dynamic object generator according to claim 3 is characterized in that also comprising heat shield (13) between described pointolite (7) and the condenser (8); The opposite side relative with heat shield (13) at pointolite (7) also placed spherical reflector (12).

5, dynamic object generator according to claim 3 is characterized in that also comprising reflector group between described optical filter (9) and the Target Board.

6, dynamic object generator according to claim 5 is characterized in that described reflector group comprises second catoptron (10) and the 3rd catoptron (11); Be radiated on the Target Board after second catoptron (10) and the 3rd catoptron (11) reflection through the converging light after optical filter (9) homogenising.

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