CN113048916A - Dynamic target simulation source for measuring tracking precision of photoelectric tracking and aiming instrument - Google Patents
Dynamic target simulation source for measuring tracking precision of photoelectric tracking and aiming instrument Download PDFInfo
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- G01—MEASURING; TESTING
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- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
Abstract
The invention belongs to the technical field of optical measurement and measurement, and particularly relates to a dynamic target simulation source for measuring the tracking precision of a photoelectric tracking and aiming instrument. The dynamic target simulation source comprises: the system comprises a bracket, a dynamic target generator, a display screen controller, a computer, a preamplifier and a signal acquisition card; aiming at the problems that the motion target simulation in one direction can be only carried out and the motion angular velocity range of the simulated dynamic target is small in the prior art, the dynamic simulation target source can carry out motion target simulation in two directions, the simulated motion target angular velocity and the simulated angular acceleration are determined by the refreshing frequency of an OLED display screen and the space angle of a light-emitting unit, and the simulated motion angular velocity of the dynamic target is accurate and wide in range.
Description
Technical Field
The invention belongs to the technical field of optical measurement and measurement, and particularly relates to a dynamic target simulation source for measuring the tracking precision of a photoelectric tracking and aiming instrument.
Background
The photoelectric tracking and aiming instrument mainly realizes the functions of searching, tracking, aiming and the like of a target. The performance of the photoelectric tracking instrument determines the working distance, the hitting precision and the like of the photoelectric tracking instrument. With the development of modern science and technology, the requirements on the photoelectric tracking instrument are higher and higher, and therefore, accurate measurement and evaluation must be carried out on the tracking accuracy index of the photoelectric tracking instrument.
The tracking precision refers to the deviation between the target position output by the video tracking subsystem and the actual target position after the photoelectric tracking collimator enters the tracking mode, and is usually represented by a deviation angle.
The domestic tracking precision measurement generally comprises two means of outfield drone aircraft detection and indoor detection. The motion rule of the target drone is not easy to master when the outfield target drone is detected, standard motion information cannot be provided for a detected system, the tracking precision of the detected system cannot be obtained quantitatively, and the outfield target drone is easy to be influenced by other factors such as weather and the like, and is high in detection cost.
The indoor detection device mainly adopts a method that a target generator is driven by a motion mechanism such as a rotary table and the like to rotate to simulate an infinite telecontrol target and finish the tracking precision detection, and the angular speed range and the angular speed precision of the simulated dynamic target are greatly influenced by a shaft system of a rotary table rotating mechanism.
For the measurement of the tracking accuracy, chinese patent 201510250710.4 discloses a detection device for the orientation tracking accuracy of a photoelectric tracker. The device mainly comprises an infinite target generator, a rotary table and a linear motion platform, wherein the infinite target generator is used for simulating an infinite target, and the rotary table and the linear motion platform are matched to drive the infinite target generator to rotate to generate a moving target in a pitching direction. The target is tracked by the tested instrument, and the tracking precision of the tested instrument is obtained through processing the tracking video image. The device has the disadvantages that the device can only simulate the moving target in one direction, and the range of the motion angular speed of the simulated dynamic target is small.
Chinese patent 201320019753 discloses a dynamic tracking precision calibration device for photoelectric tracking system, which comprises a beacon light splitting system, a high-speed image acquisition system and a processing subsystem, wherein the beacon light splitting system comprises a high-precision laser target simulator, a laser target controller, a first computer and a target plate, the image acquisition system comprises a high-speed camera, and the processing subsystem comprises a second computer. The beacon light splitting system generates a beacon mark to project to the target plate, the light spot is collected through the high-speed collecting system, and the high-speed digital image processing technology is adopted to obtain high measurement precision, so that the photoelectric tracking system is quickly and accurately corrected according to the measurement of the tracking precision. The device has the defects that the projection distance is limited, the target is not infinite for a tested photoelectric tracking system, and the device is not in line with the actual situation.
Chinese patent 201610398214 discloses a simulated dynamic target, which mainly comprises seven parts, including a main body base, a rotary shaft system, a system counterweight component, a target transmitting and detecting system, a rotary arm, a plane mirror and a touch system control box. Similar to the device disclosed in the Chinese patent 201510890772.1, the device has the disadvantages of high requirement on the rotation precision of a shaft system, small range of motion angular velocity, and vibration generated in the rotation process to influence the measurement result.
In order to solve the problems, along with the continuous improvement of the tracking and aiming precision of the photoelectric tracking and aiming instrument, a high-precision dynamic target simulation source for measuring the tracking precision of the photoelectric tracking and aiming instrument is urgently needed to be developed, and the accuracy of the evaluation of the actual tracking capability of the photoelectric tracking and aiming instrument is improved.
Disclosure of Invention
Technical problem to be solved
The technical problem to be solved by the invention is as follows: aiming at the defects of the prior art, how to provide a dynamic target simulation source for measuring the tracking precision of a photoelectric tracking and aiming instrument, which has the advantages of large simulation angular velocity range, infinite target position, no vibration in the measuring process and accurate adjustment of angular velocity and acceleration.
(II) technical scheme
In order to solve the above technical problem, the present invention provides a dynamic target simulation source for measuring tracking accuracy of a photoelectric tracking and aiming instrument, wherein the dynamic target simulation source comprises: the system comprises a support 1, a dynamic target generator 2, a display screen controller 7, a computer 8, a preamplifier 9 and a signal acquisition card 10;
the support 1 comprises a semicircular horizontal beam and a semicircular 45-degree oblique beam, the position with the largest chord length between the horizontal beam and the 45-degree oblique beam is supported and reinforced through an arc-shaped longitudinal beam, two ends of the horizontal beam are fixedly connected through a switching structure, and a plurality of upright posts are installed at the bottom of the horizontal beam to ensure that the support 1 is stably installed on the ground;
the dynamic target generator 2 comprises: the device comprises a collimating objective lens 3, an OLED display screen 4, a monitoring detector 5 and a shell 6;
the casing 6 is cylindrical, and a collimating objective 3, a monitoring detector 5 and an OLED display screen 4 are sequentially arranged in the cylinder from left to right;
the collimating objective lens 3 is arranged at the left end of the shell 6 and is positioned in the cylinder of the shell 6; the field of view of the collimating objective lens 3 is +/-omega, and the focal length is f;
the OLED display screen 4 is rectangular and is formed by arranging m multiplied by n light-emitting units; the size of a single light-emitting unit on the OLED display screen 4 is d, and m x d is equal to 2f x tan omega; the OLED display screen 4 is arranged in a right end cylinder of the shell 6 and is positioned on the focal plane of the collimating objective lens 3;
the monitoring detector 5 is arranged on one side, close to the OLED display screen 4, of the collimating objective lens 3 and the OLED display screen 4 and is used for acquiring the time information of each light emission of the OLED display screen 4;
the semicircular 45-degree oblique beam of the bracket 1 is equally divided by k-1, and the angular interval is required
K dynamic target generators 2 with the same parameters are installed at the equal division positions through connecting pieces, so that the view fields of two adjacent dynamic target generators 2 are spliced with each other and are uninterrupted in the middle; the ends of the collimating objective lenses 3 of the k dynamic target generators 2 are in the direction close to the circle center of the 45-degree oblique beam, the optical axes of the k dynamic target generators 2 converge at the circle center of the 45-degree oblique beam, and the optical axes of the k dynamic target generators 2 are in the same plane;
thus, the k dynamic target generators 2 comprise k OLED display screens 4 for a total of k × m × n light emitting units; defining the circle center of a 45-degree oblique beam on a bracket 1 as a coordinate origin, and then k x m x n light-emitting units on k OLED display screens 4 on k dynamic target generators 2 on the 45-degree oblique beam have own space angular coordinates (alpha, beta) relative to the coordinate origin;
the display screen controller 7 is connected with the k OLED display screens 4 and provides a uniform external clock for the k OLED display screens 4, so that synchronous refreshing and synchronous display of the k OLED display screens 4 are realized;
the preamplifier 9 is connected with the monitoring detector 5 and is used for amplifying the signals collected by the monitoring detector 5;
the signal acquisition card 10 is connected with the preamplifier 9 and is used for recording and displaying the signal waveform of the monitoring detector 5;
the computer 8 is connected with the display screen controller 7; installing a measuring tool on a computer 8, and communicating with a display screen controller 7 so as to control the display graphs and the display time of the k OLED display screens;
the computer 8 is connected with the signal acquisition card 10, and records and stores the light-emitting time curve detected by the monitoring detector 5.
The working principle of the dynamic target simulation source is as follows:
the computer 8 is communicated with the display screen controller 7, so that the k OLED display screens 4 are controlled to display a fixed graph; at different times, the pattern is positioned differently on the k OLED display screens 4, so that it can be seen as a moving object;
the figure is collimated into parallel beams through the collimating objective 3 and then emitted, so that a moving infinite target is simulated; because the light-emitting units on the OLED display screen 4 are very small, the refresh rate is high, and therefore the simulated moving object is equivalent to continuous movement;
the monitoring detector 5, the preamplifier 9 and the signal acquisition card 10 form a signal acquisition processing module, and the computer 8 controls, records and stores the luminous time curves of the k OLED display screens 4; by combining the calculation with the spatial angle (alpha, beta) of each light-emitting unit on the OLED display screen 4, the information of the angular velocity and the angular acceleration of the simulated moving object can be accurately obtained.
Wherein, the monitoring detector 5 adopts a photodiode, and the response time is ns level.
And 5 upright posts are arranged at the bottom of the horizontal beam.
Wherein the resolution of the OLED display screen 4 is 256 multiplied by 64;
wherein, the monitoring detector 5 is selected from S9055-01 silicon photodiode of HAMAMATSU company of Japan; the preamplifier 9 is selected from an SR570 current amplifier of Stanford corporation in America; the signal acquisition card 10 is a synchronous acquisition card with high precision and high stability of DT9824 from Data transfer company of America.
A plurality of x semicircular 45-degree oblique beams are arranged on an arc-shaped longitudinal beam of the bracket 1 at equal angular intervals, k dynamic target generators 2 are arranged on each 45-degree oblique beam in the same way, according to the size of the field of view of the dynamic target generators 2, the i (i) th at the same position on two adjacent 45-degree oblique beams is 1, 2, …, the field of view of the k dynamic target generators 2 is spliced with each other, the middle is uninterrupted, and the dynamic target simulation source can simulate a moving target in two spatial angular directions.
(III) advantageous effects
Compared with the prior art, the invention has the following beneficial effects:
(1) aiming at the problems that the motion target simulation in one direction can be only carried out and the motion angular velocity range of the simulated dynamic target is small in the prior art, the dynamic simulation target source can carry out motion target simulation in two directions, the simulated motion target angular velocity and the simulated angular acceleration are determined by the refreshing frequency of an OLED display screen and the space angle of a light-emitting unit, and the simulated motion angular velocity of the dynamic target is accurate and wide in range.
(2) Aiming at the problems that the projection distance is limited in the prior art, the target is not infinite for a measured photoelectric tracking system and is not in line with the actual situation, the dynamic target simulation source uses the collimating objective lens to collimate the light emitted by the OLED display screen into flat light, simulates the infinite target and is in line with the actual working situation of the photoelectric tracking and aiming instrument.
(3) Aiming at the problems that in the prior art, the requirement on the rotation precision of a shaft system is high, vibration is generated in the rotation process, and the measurement result is influenced, the dynamic target simulation source simulates a moving target by controlling the position of the light-emitting unit, has no moving part, avoids the influence of factors such as movement on the simulation precision of the dynamic target, and has high simulation precision.
Drawings
FIG. 1 is a schematic diagram of a dynamic target simulation source configuration according to the present invention.
FIG. 2 is a schematic diagram of the components and connections of a single dynamic object generator of the present invention.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
In order to solve the above technical problem, the present invention provides a dynamic target simulation source for measuring tracking accuracy of a photoelectric tracking and aiming device, as shown in fig. 1 and 2, the dynamic target simulation source includes: the system comprises a support 1, a dynamic target generator 2, a display screen controller 7, a computer 8, a preamplifier 9 and a signal acquisition card 10;
the support 1 comprises a semicircular horizontal beam and a semicircular 45-degree oblique beam, the position with the largest chord length between the horizontal beam and the 45-degree oblique beam is supported and reinforced through an arc-shaped longitudinal beam, two ends of the horizontal beam are fixedly connected through a switching structure, and a plurality of upright posts are installed at the bottom of the horizontal beam to ensure that the support 1 is stably installed on the ground;
the dynamic target generator 2 comprises: the device comprises a collimating objective lens 3, an OLED display screen 4, a monitoring detector 5 and a shell 6;
the casing 6 is cylindrical, and a collimating objective 3, a monitoring detector 5 and an OLED display screen 4 are sequentially arranged in the cylinder from left to right;
the collimating objective lens 3 is arranged at the left end of the shell 6 and is positioned in the cylinder of the shell 6; the field of view of the collimating objective lens 3 is +/-omega, the focal length is f, and the focal length is more than or equal to 450 mm;
the OLED display screen 4 is rectangular and is formed by arranging m multiplied by n light-emitting units; the size of a single light-emitting unit on the OLED display screen 4 is d, which is less than or equal to 0.2mm, m x d is equal to 2f x tan omega, and the refreshing frequency is greater than or equal to 60 Hz; the OLED display screen 4 is arranged in a right end cylinder of the shell 6 and is positioned on the focal plane of the collimating objective lens 3;
the monitoring detector 5 is arranged on one side, close to the OLED display screen 4, of the collimating objective lens 3 and the OLED display screen 4 and is used for acquiring the time information of each light emission of the OLED display screen 4;
the semicircular 45-degree oblique beam of the bracket 1 is equally divided by k-1, and the angular interval is required
K dynamic target generators 2 with the same parameters are installed at the equal division positions through connecting pieces, so that the view fields of two adjacent dynamic target generators 2 are spliced with each other and are uninterrupted in the middle; the ends of the collimating objective lenses 3 of the k dynamic target generators 2 are in the direction close to the circle center of the 45-degree oblique beam, the optical axes of the k dynamic target generators 2 converge at the circle center of the 45-degree oblique beam, and the optical axes of the k dynamic target generators 2 are in the same plane;
thus, the k dynamic target generators 2 comprise k OLED display screens 4 for a total of k × m × n light emitting units; defining the circle center of a 45-degree oblique beam on a bracket 1 as a coordinate origin, and then k x m x n light-emitting units on k OLED display screens 4 on k dynamic target generators 2 on the 45-degree oblique beam have own space angular coordinates (alpha, beta) relative to the coordinate origin;
the display screen controller 7 is connected with the k OLED display screens 4 and provides a uniform external clock for the k OLED display screens 4, so that synchronous refreshing and synchronous display of the k OLED display screens 4 are realized;
the preamplifier 9 is connected with the monitoring detector 5 and is used for amplifying the signals collected by the monitoring detector 5;
the signal acquisition card 10 is connected with the preamplifier 9 and is used for recording and displaying the signal waveform of the monitoring detector 5;
the computer 8 is connected with the display screen controller 7; installing a measuring tool on a computer 8, and communicating with a display screen controller 7 so as to control the display graphs and the display time of the k OLED display screens;
the computer 8 is connected with the signal acquisition card 10, and records and stores the light-emitting time curve detected by the monitoring detector 5.
The working principle of the dynamic target simulation source is as follows:
the computer 8 is communicated with the display screen controller 7, so that the k OLED display screens 4 are controlled to display a fixed graph; at different times, the pattern is positioned differently on the k OLED display screens 4, so that it can be seen as a moving object;
the figure is collimated into parallel beams through the collimating objective 3 and then emitted, so that a moving infinite target is simulated; because the light-emitting units on the OLED display screen 4 are very small, the refresh rate is high, and therefore the simulated moving object is equivalent to continuous movement;
the monitoring detector 5, the preamplifier 9 and the signal acquisition card 10 form a signal acquisition processing module, and the computer 8 controls, records and stores the luminous time curves of the k OLED display screens 4; by combining the calculation with the spatial angle (alpha, beta) of each light-emitting unit on the OLED display screen 4, the information of the angular velocity and the angular acceleration of the simulated moving object can be accurately obtained.
Wherein, the monitoring detector 5 adopts a photodiode, and the response time is ns level.
And 5 upright posts are arranged at the bottom of the horizontal beam.
Wherein the resolution of the OLED display screen 4 is 256 multiplied by 64;
wherein, the monitoring detector 5 is selected from S9055-01 silicon photodiode of HAMAMATSU company of Japan; the preamplifier 9 is selected from an SR570 current amplifier of Stanford corporation in America; the signal acquisition card 10 is a synchronous acquisition card with high precision and high stability of DT9824 from Data transfer company of America.
A plurality of x semicircular 45-degree oblique beams are arranged on an arc-shaped longitudinal beam of the bracket 1 at equal angular intervals, k dynamic target generators 2 are arranged on each 45-degree oblique beam in the same way, according to the size of the field of view of the dynamic target generators 2, the i (i) th at the same position on two adjacent 45-degree oblique beams is 1, 2, …, the field of view of the k dynamic target generators 2 is spliced with each other, the middle is uninterrupted, and the dynamic target simulation source can simulate a moving target in two spatial angular directions.
Example 1
As shown in fig. 1, the dynamic target simulation source of this embodiment includes a support 1, a dynamic target generator 2, a display screen controller 7, a computer 8, a preamplifier 9, and a signal acquisition card 10.
The support 1 comprises a semicircular horizontal beam and a semicircular 45-degree oblique beam, the maximum chord length position between the horizontal beam and the 45-degree oblique beam is supported and reinforced through an arc-shaped longitudinal beam, two ends of the support are fixedly connected through a switching structure, and 5 stand columns are installed at the bottom of the horizontal beam to ensure that the support 1 is stably installed on the ground. In the preferred embodiment, the semi-circular 45 ° stringer has a radius of 2.5m and a span of 180 °. The supporting leg height is 600 mm. The support 1 is designed into a structure convenient to disassemble and reassemble, and is made of a high-rigidity material and not easy to deform.
The dynamic target generator 2 comprises: the device comprises a collimating objective lens 3, an OLED display screen 4, a monitoring detector 5 and a shell 6;
the casing 6 is cylindrical, and a collimating objective 3, a monitoring detector 5 and an OLED display screen 4 are sequentially arranged in the cylinder from left to right.
The collimator objective 3 is arranged at the left end of the shell 6 and is positioned in the cylinder of the shell 6. In the preferred embodiment, the aperture of the collimator objective lens 3 is phi 80mm, the field of view is +/-2 degrees, and the focal length is 500 mm.
The OLED display screen 4 is rectangular and is arranged on the focal plane of the collimating objective lens 3, in the preferred embodiment, the resolution of the OLED display screen 4 is 256 multiplied by 64, the size of a single light-emitting unit is 0.2mm, and the refreshing frequency is 60 Hz.
The monitoring detector 5 is arranged on one side, close to the OLED display screen 4, of the collimating objective lens 3 and the OLED display screen 4 and is used for collecting the time information of each light emission of the OLED display screen. In the preferred embodiment, the monitoring detector 5 is implemented by using a S9055-01 silicon photodiode of HAMAMATSU corporation of Japan, and the response time of the photodiode is less than 0.5 ns.
In the preferred embodiment, the semicircular 45 ° diagonals of the bracket 1 are equally divided by 44 with an angular separation of 4 °. 45 dynamic target generators 2 with the same parameters are installed at the equal division positions through connecting pieces, and the fields of view of two adjacent dynamic target generators 2 are spliced with each other without interruption. The collimator objective 3 ends of the 45 dynamic target generators 2 are in the direction close to the circle center of the 45-degree oblique beam, the optical axes of the 45 dynamic target generators 2 converge at the circle center of the 45-degree oblique beam, and the optical axes of the 45 dynamic target generators 2 are in the same plane.
The 45 dynamic object generators 2 have 45 OLED display screens 4, and a total of 45 × 256 × 64 — 737200 light-emitting units. The circle center of the 45-degree oblique beam on the bracket 1 is defined as the origin of coordinates, and 737200 light-emitting units on the 45 dynamic target generators 2 on the 45-degree oblique beam have own spatial angular coordinates (alpha, beta) relative to the origin of coordinates.
In the preferred embodiment, the display controller 7 is connected to the 45 OLED display screens 4 to provide a uniform external clock for the 45 OLED display screens 4, so as to implement synchronous refresh and synchronous display of the 45 OLED display screens 4, and thus, the 45 spatially separated OLED display screens 4 constitute a large display screen, and the display controller 7 controls the large display screen to display a cross pattern, and coordinates (α, β) of light emitting units in the center of the cross pattern are different at different times, so as to simulate uniform motion, uniform acceleration motion and sinusoidal motion. In the preferred embodiment, the range of angular acceleration of the moving object is simulated: 0.1 degree/s2～180°/s2(ii) a Angular velocity range: 0.1 degree/s-180 degree/s.
The preamplifier 9 is connected with the monitoring detector 5 and is used for amplifying the signals acquired by the monitoring detector 5. In the preferred embodiment, the preamplifier 6 is selected from the current amplifier SR570 available from Stanford, USA. The sensitivity range is from 1pA/V to 1mA/V, and the frequency response is as follows: 0.5dB to 1 MHz; sensitivity: 1pA/V-1 mA/V; stability: is better than 0.001 percent.
The signal acquisition card 10 is connected with the preamplifier 9 and is used for recording and displaying the signal waveform of the monitoring detector 5. In the preferred embodiment, the acquisition card 10 is a synchronous acquisition card with high precision and high stability of DT9824 from Data transfer of America, which can provide a measurement precision of 10ppm (0.001%), and the maximum noise is 1.5 ppm.
The computer 8 is connected with the display screen controller 7. In the preferred embodiment, measurement software is installed on the computer 8 and communicates with the display screen controller 7 to control the display graphics and display time of the 45 OLED display screens.
The computer 8 is connected with the acquisition card 10, and records and stores the light-emitting time curve detected by the monitoring detector 5.
In the preferred embodiment, the computer 8 communicates with the display controller 7 to control 45 OLED displays 4 to display a cross pattern, and two orthogonal lines of the cross pattern are composed of 5 adjacent light-emitting units. At different moments, the positions of the cross-shaped patterns on the 45 OLED display screens 4 are different, and the change of the relative positions of the cross-shaped patterns along with time can be regarded as the motion process of one target. The cross pattern is collimated into parallel beams by the collimating objective 3 and then emitted, so that a moving infinite target is simulated.
When the dynamic target simulation source works, the display screen controller 7 controls all the light-emitting units on the OLED display screen 4 to emit light at different moments according to a set motion mode, so as to simulate a dynamic moving target. The monitoring detector 5, the preamplifier 9 and the signal acquisition card 10 form a signal acquisition processing module, and the computer 8 controls, records and stores the light-emitting time curves of the 45 OLED display screens 4. By combining the calculation with the spatial angle (alpha, beta) of each light-emitting unit on the OLED display screen 4, the information of the angular velocity and the angular acceleration of the simulated moving object can be accurately obtained. Therefore, the preferred embodiment provides a dynamic target simulation source which has a large simulation angular velocity range, an infinite target, no vibration in the measurement process and an accurately adjustable angular velocity and acceleration for the tracking precision measurement of the photoelectric tracking and aiming device.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A dynamic target simulation source for measuring tracking accuracy of a photoelectric tracking and aiming device, which is characterized by comprising: the system comprises a support (1), a dynamic target generator (2), a display screen controller (7), a computer (8), a preamplifier (9) and a signal acquisition card (10);
the support (1) comprises a semicircular horizontal beam and a semicircular 45-degree oblique beam, the position with the largest chord length between the horizontal beam and the 45-degree oblique beam is supported and reinforced through an arc-shaped longitudinal beam, two ends of the horizontal beam are fixedly connected through a switching structure, and a plurality of stand columns are installed at the bottom of the horizontal beam to ensure that the support (1) is stably installed on the ground;
the dynamic target generator (2) comprises: the device comprises a collimating objective lens (3), an OLED display screen (4), a monitoring detector (5) and a shell (6);
the casing (6) is cylindrical, and a collimating objective lens (3), a monitoring detector (5) and an OLED display screen (4) are sequentially arranged in the cylinder from left to right;
the collimating objective (3) is arranged at the left end of the shell (6) and is positioned in the cylinder of the shell (6); the field of view of the collimating objective lens (3) is +/-omega, and the focal length is f;
the OLED display screen (4) is rectangular and is formed by arranging m multiplied by n light-emitting units; the size of a single light-emitting unit on the OLED display screen (4) is d, and m multiplied by d is equal to 2f multiplied by tan omega; the OLED display screen (4) is arranged in the right end cylinder of the shell (6) and is positioned on the focal plane of the collimating objective lens (3);
the monitoring detector (5) is arranged on one side, close to the OLED display screen (4), of the collimating objective lens (3) and the OLED display screen (4) and is used for collecting time information of each time of light emission of the OLED display screen (4);
the semicircular 45-degree oblique beam of the bracket (1) is equally divided by k-1, and the angular interval is required
K dynamic target generators (2) with the same parameters are installed at the equal dividing positions through connecting pieces, so that the fields of view of two adjacent dynamic target generators (2) are spliced with each other and are uninterrupted in the middle; the ends of the collimating objective lenses (3) of the k dynamic target generators (2) are in the direction close to the circle center of the 45-degree oblique beam, the optical axes of the k dynamic target generators (2) converge at the circle center of the 45-degree oblique beam, and the optical axes of the k dynamic target generators (2) are in the same plane;
thus, the k dynamic target generators (2) comprise k OLED display screens (4) with a total of k × m × n light emitting units; defining the circle center of a 45-degree oblique beam on a bracket (1) as a coordinate origin, and setting the spatial angular coordinates (alpha, beta) of k x m x n light-emitting units on k OLED display screens (4) on k dynamic target generators (2) on the 45-degree oblique beam relative to the coordinate origin;
the display screen controller (7) is connected with the k OLED display screens (4) and provides a uniform external clock for the k OLED display screens (4), so that synchronous refreshing and synchronous display of the k OLED display screens (4) are realized;
the preamplifier (9) is connected with the monitoring detector (5) and is used for amplifying the signals collected by the monitoring detector (5);
the signal acquisition card (10) is connected with the preamplifier (9) and is used for recording and displaying the signal waveform of the monitoring detector (5);
the computer (8) is connected with the display screen controller (7); installing a measuring tool on a computer (8), and communicating with a display screen controller (7) so as to control the display graphs and the display time of the k OLED display screens;
the computer (8) is connected with the signal acquisition card (10) and is used for recording and storing the light-emitting time curve detected by the monitoring detector (5).
2. The dynamic target simulation source for measuring the tracking accuracy of the photoelectric tracker according to claim 1, wherein the working principle of the dynamic target simulation source is as follows:
communicating with a display screen controller (7) by a computer (8) to control k OLED display screens (4) to display a fixed pattern; at different times, the pattern is positioned differently on the k OLED display screens (4) and can thus be seen as a moving object;
the pattern is collimated into parallel beams through a collimating objective lens (3) and then emitted, so that a moving infinite target is simulated; because the luminous units on the OLED display screen (4) are small and the refresh rate is high, the simulated moving object is equivalent to continuous movement;
the monitoring detector (5), the preamplifier (9) and the signal acquisition card (10) form a signal acquisition processing module, and a computer (8) controls, records and stores light-emitting time curves of the k OLED display screens (4); the information of the angular speed and the angular acceleration of the simulated moving target can be accurately obtained through the combined calculation with the spatial angles (alpha, beta) of each light-emitting unit on the OLED display screen (4).
3. The dynamic target simulation source for measurement of tracking accuracy of photoelectric trackers according to claim 1, characterized in that the focal length of the collimator objective (3) is equal to or greater than 450 mm.
4. The dynamic target simulation source for measurement of tracking accuracy of photoelectric tracker according to claim 1, characterized in that the size d of the single light emitting unit on the OLED display screen (4) is equal to or less than 0.2 mm.
5. The dynamic target simulation source for measurement of tracking accuracy of a photoelectric tracker according to claim 1, characterized in that the refresh frequency of the OLED display screen (4) is equal to or higher than 60 Hz.
6. The dynamic target simulation source for the tracking accuracy measurement of the photoelectric tracker according to claim 1, wherein the monitoring detector (5) is a photodiode, and the response time is ns level.
7. The dynamic target simulation source for the tracking accuracy measurement of the photoelectric tracker according to claim 1, wherein 5 vertical columns are installed at the bottom of the horizontal beam.
8. The dynamic target simulation source for measurement of tracking accuracy of a photoelectric tracker according to claim 1, characterized in that the OLED display screen (4) resolution is 256 x 64.
9. The dynamic target simulation source for the tracking accuracy measurement of the photoelectric tracker according to claim 1, wherein the monitoring detector (5) is a silicon photodiode of HAMAMATSU S9055-01, japan; the preamplifier (9) is an SR570 current amplifier of Stanford company in America; the signal acquisition card (10) is a synchronous acquisition card with high precision and high stability of DT9824 of American Data transfer company.
10. The dynamic target simulation source for the tracking accuracy measurement of the photoelectric tracking aiming device is characterized in that a plurality of x semicircular 45-degree oblique beams are arranged on the arc-shaped longitudinal beam of the bracket (1) at equal angular intervals, k dynamic target generators (2) are arranged on each 45-degree oblique beam, the view fields of the ith, i-1, 2, …, k dynamic target generators (2) at the same position on two adjacent 45-degree oblique beams are spliced with each other according to the view field size of the dynamic target generators (2), and the dynamic target simulation source can simulate a moving target in two spatial angular directions without interruption.
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