CN110806307A - Method for rapidly detecting stability precision of photoelectric sight-stabilizing system - Google Patents
Method for rapidly detecting stability precision of photoelectric sight-stabilizing system Download PDFInfo
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- CN110806307A CN110806307A CN201911134167.6A CN201911134167A CN110806307A CN 110806307 A CN110806307 A CN 110806307A CN 201911134167 A CN201911134167 A CN 201911134167A CN 110806307 A CN110806307 A CN 110806307A
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Abstract
The invention discloses a method for quickly detecting the stability precision of a photoelectric sight stabilizing system, which belongs to the field of detection of the photoelectric sight stabilizing system.
Description
Technical Field
The invention relates to the field of detection of photoelectric sight stabilizing systems, in particular to a method for quickly detecting the stability precision of a photoelectric sight stabilizing system.
Background
With the wide application of the aviation, aerospace, vehicle-mounted and ship-based photoelectric sight stabilizing systems, the requirements on the stability of the photoelectric sight stabilizing systems are higher and higher. The stability refers to a function that the photoelectric sight stabilizing system keeps stable in a certain specified coordinate system, that is, when the surrounding environment changes dynamically, angles of the direction, the pitch direction and the roll direction of the photoelectric sight stabilizing system relative to the coordinate system are always kept unchanged. The stability accuracy of the photoelectric sight stabilizing system is taken as an important index, and the feasibility and the reliability of the detection method are particularly important, so that the patent provides a method for detecting the stability accuracy of the photoelectric sight stabilizing system, and the detection method has the characteristics of rapidness and effectiveness.
At present, there are some methods for detecting the stability accuracy of the photoelectric sight-stabilizing system, as shown in fig. 1, based on that a plane mirror is fixedly connected to the photoelectric sight-stabilizing system and is placed on a swing table, light emitted by a light source is reflected by the plane mirror to a Position Sensitive Detector (PSD), and then the stability accuracy of the photoelectric sight-stabilizing system is calculated according to corresponding data processing, which has the main defects that: the gyro-stabilization-based photoelectric sight-stabilizing system cannot eliminate line-of-sight stabilization errors of the photoelectric sight-stabilizing system caused by translation of a moving carrier.
Disclosure of Invention
In order to solve the technical problems, the invention discloses a method for quickly detecting the stability precision of a photoelectric sight stabilizing system, which is simple and convenient to operate, simple in calculation and high in implementability.
The invention is realized by the following technical scheme:
a method for rapidly detecting the stability precision of a photoelectric sight-stabilizing system takes a six-freedom-degree swing platform, a semiconductor laser indicator, a collimating lens, a PSD, a processing circuit and a computer as a test tool, and comprises the following steps:
1) mounting a semiconductor laser indicator on a sight stabilizing optical bench of a photoelectric sight stabilizing system to enable a laser beam to be parallel to a sight stabilizing line of the photoelectric sight stabilizing system;
2) keeping the swing table in a stop state, and fixing the photoelectric sight stabilizing system on the swing table with six degrees of freedom;
3) placing an optical platform at a position 2-5 meters away from the laser emitting direction, and installing a collimating lens on the optical platform to enable laser to enter along the optical axis direction of the collimating lens;
4) the PSD is arranged on an optical platform, is arranged at a focal plane which is f meters away from the collimating lens and is used for receiving laser emergent light spots, is connected with a corresponding processing circuit and a computer, and records the motion data of the light spots;
5) starting the detection work formally, starting the semiconductor laser indicator and the photoelectric sight stabilizing system, and recording the position data P of the light spot on the PSD by the computer0(x0,y0)；
6) Starting the six-freedom-degree swing platform, and recording the position coordinate P of the light spot on the PSD by using a computeri(xi,yi) Then Δ Sx＝xi-x0，ΔSy＝yi-y0；
7) Calculating the stability accuracy sigma of the photoelectric sight stabilizing system in the azimuth and the pitch respectively according to the formula tan α ═ delta S/fx＝actan(Δsx/f)，σy＝actan(ΔsyAnd/f), wherein f is the focal length of the collimating lens.
In the invention, a laser is directly arranged on a photoelectric sight stabilizing system, so that a laser beam is parallel to a sight line of the photoelectric sight stabilizing system, enters a collimating lens along an optical axis direction and is focused on a PSD (phase-sensitive detector) placed on a rear focal plane of the collimating lens, when the posture of the photoelectric sight stabilizing system is changed, a light ray emitted by the laser enters the collimating lens at an angle of α degrees with the optical axis, a distance delta S is formed between an image point formed on the rear focal plane and an original image point, and the focal length of the collimating lens is f, so that the stability precision of the photoelectric sight stabilizing system is sigmax＝actan(Δsx/f)，σy＝actan(Δsy/f)，σxIndicating the amount of displacement, σ, of the laser beam in the horizontal direction relative to the initial point of sightyThe offset of the laser beam relative to the initial aiming point in the high-low direction is represented, in the running process of the six-freedom-degree swing table, the photoelectric sight stabilizing system overcomes the disturbance of a carrier to keep the aiming line to be stably pointed in an inertial space, the aiming line of the photoelectric sight stabilizing system is parallel to the laser beam, the offset of a laser spot is equivalent to the offset of the aiming line, the smaller the value of the offset represents that the degree of the aiming line deviating from the initial aiming point is, the smaller the value is, the smaller the offsetThe better the line sight stability of the photoelectric sight stabilizing system is, the simple and convenient operation, the simple calculation and the high implementability of the method are realized.
In step 5), the test tool needs to be calibrated before the detection work formally starts.
Further, the calibration method comprises the following steps: the method comprises the steps of starting a semiconductor laser indicator, finely adjusting a collimating lens to enable an incident point of laser to be on the central point of the collimating lens, ensuring that the incident point of the laser can be within the aperture of the collimating lens after a swing table is started, adjusting a PSD plane to enable emergent rays to fall within the range of the central point of a PSD photosensitive surface, ensuring that a transmission light point of the laser can fall in an area with good linearity of a PSD device when the swing table works, and closing all devices after test work is finished.
Furthermore, the central point range is within the central point radius A-Bcm of the PSD photosensitive surface.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention relates to a method for quickly detecting the stability precision of a photoelectric sight stabilizing system0Aiming line s of photoelectric sight-stabilizing system0Maintained parallel, laser beam l0The light enters the collimating lens along the direction of the optical axis of the collimating lens and is focused on the PSD (phase-sensitive detector) placed on the rear focal plane of the collimating lens, and when the photoelectric sight stabilizing system overcomes the disturbance of a carrier and keeps the sight line stable in the inertial space, if the sight line siWith the initial line of sight s0When the included angle α is generated, the laser beam l of the laser indicatoriThe light beam enters the collimating lens at an angle of α degrees with the optical axis of the collimating lens, the distance between the image point formed on the back focal plane and the original image point is delta S, the focal length of the collimating lens is f, and the stability precision of the photoelectric sight stabilizing system is sigmax＝actan(Δsx/f)，σy＝actan(ΔsyAnd/f). If the carrier moves in the process of translation, the line of sight of the photoelectric sight stabilizing system and the laser beam of the laser indicator can synchronously and equivalently translate, and because the collimating lens converges the beams incident parallel to the optical axis on the focal point of the back focal plane, the translation amount of the laser beam penetrating through the collimating lens is eliminated, so that the laser beam can be synchronously translated in the same directionAnd the influence of the carrier translation on the stability precision is eliminated.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic diagram of a detection method in the background art.
FIG. 2 is a schematic view of the detection method of the present invention.
Reference numbers and corresponding part names in the drawings:
1-a swing table, 2-a photoelectric sight stabilizing system, 3-a semiconductor laser indicator, 4-a collimating lens, 5-PSD, 6-a processing circuit and 7-a computer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
As shown in fig. 2, the method for rapidly detecting the stability precision of the photoelectric sight-stabilizing system of the present invention uses a six-degree-of-freedom swing table 1, a semiconductor laser pointer 3, a collimating lens 4, a PSD5, a processing circuit 6 and a computer 7 as test tools, and comprises the following steps:
1) mounting a semiconductor laser indicator 3 on a sight stabilizing optical bench of a photoelectric sight stabilizing system 2, wherein a light beam is parallel to a sight stabilizing line of the photoelectric sight stabilizing system;
2) keeping the swing table 1 in a stop state, and fixing the photoelectric sight stabilizing system 2 on the swing table 1 with six degrees of freedom;
3) placing an optical platform at a position 2-5 meters away from the laser emitting direction, and installing a collimating lens 4 on the optical platform to enable laser to be incident along the optical axis direction of the collimating lens 4;
4) the PSD5 is arranged on an optical platform, is arranged at a focal plane f meters away from the collimating lens and is used for receiving laser emergent light spots, is connected with a corresponding processing circuit 6 and a computer 7, and records the motion data of the light spots;
5) starting the detection work formally, starting the semiconductor laser indicator 3 and the photoelectric sight stabilizing system 2, and recording the position data P of the light spot on the PSD by the computer 70(x0,y0)；
6) The six-degree-of-freedom swing platform 1 is started, and the position coordinate P of the light spot on the PSD5 at the moment is recorded by the computer 7i(xi,yi) Then Δ Sx＝xi-x0，ΔSy＝yi-y0；
7) Calculating the stability accuracy sigma of the photoelectric sight stabilizing system in the azimuth and the pitch respectively according to the formula tan α ═ delta S/fx＝actan(Δsx/f)，σy＝actan(ΔsyAnd/f), wherein f is the focal length of the collimating lens.
In step 5), before the detection work formally starts, the test tool needs to be calibrated.
The calibration method comprises the following steps: the semiconductor laser indicator 3 is started, the collimating lens 4 is finely adjusted, the incident point of laser is located at the central point of the collimating lens 4, the incident point of the laser can be located within the aperture of the collimating lens 4 after the swing table 1 is started, the PSD5 plane is adjusted, the emergent ray is located within the range of the central point of the PSD photosensitive surface, it is ensured that when the swing table works, the transmission light point of the laser can be located in an area with good linearity of a PSD device, and after the test work is finished, all devices are closed.
The central point range is within the central point radius A-Bcm of the PSD photosensitive surface.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. A method for rapidly detecting the stability precision of a photoelectric sight stabilizing system is characterized in that a six-degree-of-freedom swing table (1), a semiconductor laser indicator (3), a collimating lens (4), a PSD (5), a processing circuit (6) and a computer (7) are used as testing tools, and the method comprises the following steps:
1) mounting a semiconductor laser indicator (3) on a sight stabilizing optical bench of a photoelectric sight stabilizing system (2), wherein a light beam is parallel to a sight stabilizing line of the photoelectric sight stabilizing system;
2) keeping the swing table (1) in a stop state, and fixing the photoelectric sight stabilizing system (2) on the swing table (1) with six degrees of freedom;
3) an optical platform is placed in the laser emergent direction, and a collimating lens (4) is arranged on the optical platform to enable laser to be incident along the optical axis direction of the collimating lens (4);
4) the PSD (5) is arranged on an optical platform, is arranged at a focal plane f meters away from the collimating lens and is used for receiving laser emergent light spots, is connected with a corresponding processing circuit (6) and a computer (7) and records motion data of the light spots;
5) when the detection work formally starts, the semiconductor laser indicator (3) and the photoelectric sight stabilizing system (2) are started, and the computer records (7) the position data P of the light spot on the PSD0(x0,y0)；
6) Starting the six-degree-of-freedom swing platform (1), and recording the position coordinate P of the light spot on the PSD (5) by using a computer (7)i(xi,yi) Then Δ Sx＝xi-x0，ΔSy＝yi-y0；
7) Calculating the stability accuracy sigma of the photoelectric sight stabilizing system in the azimuth and the pitch respectively according to the formula tan α ═ delta S/fx＝actan(Δsx/f)，σy＝actan(ΔsyAnd/f), wherein f is the focal length of the collimating lens.
2. The method for rapidly detecting the stability accuracy of the photoelectric sight-stabilizing system according to claim 1, wherein in the step 5), the test tool needs to be calibrated before the detection work formally starts.
3. The method for rapidly detecting the stability precision of the photoelectric sight stabilizing system according to claim 2, wherein the calibration method comprises the following steps: the method comprises the steps of starting a semiconductor laser indicator (3), finely adjusting a collimating lens (4), enabling an incident point of laser to be on the central point of the collimating lens (4), ensuring that the incident point of the laser can be within the caliber of the collimating lens (4) after a swing table (1) is started, adjusting a PSD (5) plane, enabling emergent rays to fall within the central point range of a PSD photosensitive surface, ensuring that a transmission light spot of the laser can fall in an area with good linearity of a PSD device when the swing table works, and closing all devices after test work is finished.
4. The method according to claim 3, wherein the center point range is within a center point radius A-Bcm of the PSD photosurface.
5. The method for rapidly detecting the stability precision of the photoelectric sight-stabilizing system according to claim 1, wherein the distance between the semiconductor laser pointer (3) and the optical platform is 2-5 m.
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Cited By (3)
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| CN111982153A (en) * | 2020-08-11 | 2020-11-24 | 中国人民解放军海军潜艇学院 | Method and system for testing collimation model of inertial navigation platform of submarine-launched missile |
| CN112903246A (en) * | 2021-01-20 | 2021-06-04 | 西安应用光学研究所 | Method for measuring stability precision of coarse-fine combined two-stage stable photoelectric system |
| CN116147891A (en) * | 2023-01-04 | 2023-05-23 | 北京东方锐镭科技有限公司 | Laser aiming precision measuring equipment |
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| CN116147891A (en) * | 2023-01-04 | 2023-05-23 | 北京东方锐镭科技有限公司 | Laser aiming precision measuring equipment |
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