A seeker zero calibration device

Abstract

The utility model provides a kind of guide head zero calibration device, including target simulator mechanism, general interface mechanism and vertical support mechanism, the target simulator mechanism and general interface mechanism are respectively installed in the upper and lower ends of vertical support mechanism, general interface mechanism has the connecting portion compatible with the installation interface of the guide head to be calibrated, the optical center of the target simulator mechanism coincides with the mechanical axis of connecting portion. This guide head zero calibration device adopts vertical structure form, can be straight up to guide head and carry out zero calibration work, and occupies small space and is convenient to transfer, while guide head can be directly assembled through general interface mechanism, solve the problem that the existing horizontal guide head zero calibration device has big guide head assembly difficulty, and the space distance between target simulator mechanism and general interface mechanism is larger, can satisfy different length guide head and carry out zero calibration, expand application range.

Description

Technical Field

[0001] This utility model belongs to the field of seeker testing technology, specifically relating to a seeker zero-position calibration device. Background Technology

[0002] As the core component of precision-guided weapons, the seeker works by identifying targets through internal detectors and providing the target's position to the missile, guiding it to hit the target. Throughout the seeker's entire operation, its zero-position accuracy directly affects the missile's guidance precision and success rate.

[0003] The zero-position of the seeker is mainly affected by the line of sight of the optical system, the reference axis of the inertial measurement system, and the mechanical axis of the missile body. Theoretically, these three should be completely aligned and pointing forward of the missile body. However, due to manufacturing errors, assembly errors, and other factors, there are certain deviations between them. The purpose of zero-position calibration is to calibrate and correct these errors, providing the seeker with a true and accurate angular and inertial reference, thus ensuring the missile's accuracy.

[0004] Most existing seeker zero-position calibration devices are horizontal structures, mainly composed of a target simulator, an optical collimation mechanism, a high-precision turntable, and a seeker fixing mechanism. The entire device is placed on a horizontal platform. In use, parallel light is provided by the target simulator and the optical collimation mechanism. The mechanical axis of the seeker fixing mechanism is adjusted to be parallel to the light by the high-precision turntable. When calibrating, the seeker is installed on the seeker fixing mechanism, facing the target simulator to receive the horizontal parallel light source. The seeker frame is rotated to ensure that the optical axis is parallel to the projectile axis, thus realizing the seeker zero-position calibration.

[0005] However, the existing seeker zero-position calibration device needs to be installed on a horizontal platform, which is large and inconvenient to transport. At the same time, since the seeker spindle is mostly parallel to the optical center and the seeker mechanical interface is cylindrical, the seeker needs to be mounted on the side of the seeker fixing mechanism during calibration, which poses a certain assembly difficulty for larger seekers. Utility Model Content

[0006] The purpose of this invention is to provide a zero-position calibration device for a seeker head, which can at least solve some of the defects existing in the prior art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A seeker zero-position calibration device includes a target simulator mechanism, a universal interface mechanism, and an upright support mechanism. The target simulator mechanism and the universal interface mechanism are respectively installed at the upper and lower ends of the upright support mechanism. The universal interface mechanism has a connecting part adapted to the mounting interface of the seeker to be calibrated. The optical center of the target simulator mechanism coincides with the mechanical axis of the connecting part.

[0009] Furthermore, the target simulator mechanism includes a light source assembly, a target plate, an off-axis reflector, and a reflector adjustment assembly. The light emitted by the light source assembly passes through the target plate and is incident on the off-axis reflector. After being reflected by the off-axis reflector, it is directed towards the connection part of the universal interface mechanism. The reflector adjustment assembly is used to adjust the position of the off-axis reflector so that the central axis of the light reflected by the off-axis reflector coincides with the mechanical axis of the connection part.

[0010] Furthermore, the light source assembly includes a bulb, a bulb holder, and a simulator mounting base. The bulb is mounted on the bulb holder, and the bulb holder and the target plate are respectively threaded to both ends of the simulator mounting base.

[0011] Furthermore, the reflector adjustment assembly includes an adjustment base plate and a reflector mounting base. The off-axis reflector is mounted on the reflector mounting base, and the reflector mounting base is mounted on the adjustment base plate. The reflector mounting base has horizontal adjustment components on both sides for adjusting the horizontal angle of the off-axis reflector, and the adjustment base plate and / or the bottom surface of the reflector mounting base has vertical adjustment components for adjusting the vertical angle of the off-axis reflector.

[0012] Furthermore, the universal interface mechanism includes an adapter and a zero-position calibration adapter plate. The bottom of the adapter is mounted on the upright support mechanism, the zero-position calibration adapter plate is mounted on the upper surface of the adapter, and the connecting part is disposed on the zero-position calibration adapter plate.

[0013] Furthermore, the adapter is a cylindrical structure, and an opening is provided on the side wall of the adapter.

[0014] Furthermore, the upright support mechanism includes a light source support, a simulator support plate, and a mounting base. The simulator support plate is installed on the upper part of the light source support, and the bottom of the light source support is fixedly installed on the mounting base. The parallelism between the upper and lower end faces of the simulator support plate is no greater than 0.02 mm, and the perpendicularity between the simulator support plate on the light source support and the mounting end face of the mounting base is no greater than 0.03 mm.

[0015] Furthermore, the light source bracket is a hollow column structure, and the side wall of the light source bracket is provided with a groove.

[0016] Furthermore, the aforementioned seeker zero-position calibration device also includes a calibration mechanism for calibrating the optical center of the target simulator mechanism to coincide with the mechanical axis of the connecting part.

[0017] Furthermore, the calibration mechanism includes a CCD camera, an industrial control computer, and a calibration component with a crosshair cursor. The calibration component is mounted on the universal interface mechanism, and the center of the crosshair cursor of the calibration component is located on the mechanical axis of the universal interface mechanism. The CCD camera is electrically connected to the industrial control computer, and the CCD camera and the universal interface mechanism are arranged coaxially.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] The zero-position calibration device for a seeker provided by this utility model adopts an upright structure, which allows the seeker to be erected for zero-position calibration. It occupies little space and is easy to transport. At the same time, the seeker can be directly assembled through a universal interface mechanism, which solves the problem of large seeker assembly difficulty in existing horizontal seeker zero-position calibration devices. Moreover, the space distance between the target simulator mechanism and the universal interface mechanism is large, which can meet the zero-position calibration of seekers of different lengths and expand the application range.

[0020] The present invention will be further described in detail below with reference to the accompanying drawings. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the zero-position calibration device for the guide head in an embodiment of this utility model;

[0022] Figure 2 This is a schematic diagram of the target simulator mechanism in an embodiment of this utility model;

[0023] Figure 3 This is a schematic diagram of the general interface mechanism in the embodiments of this utility model;

[0024] Figure 4 This is a schematic diagram of the upright support mechanism in an embodiment of this utility model;

[0025] Figure 5 This is a schematic diagram of the calibration mechanism performing calibration in an embodiment of this utility model;

[0026] Figure 6 This is a schematic diagram of the calibration component in an embodiment of this utility model.

[0027] Explanation of reference numerals in the attached drawings: 100, Target simulator mechanism; 200, Universal interface mechanism; 300, Upright support mechanism; 400, Guide head to be calibrated; 500, Calibration component; 600, CCD camera; 700, Industrial control computer; 101, Reflector mounting base; 102, Off-axis reflector; 103, Adjustment base plate; 104, Target plate; 105, Simulator mounting base; 106, Bulb holder; 107, Bulb; 108, Threaded hole; 201, Zero-position calibration adapter plate; 202, Positioning pin; 203, Connecting part; 204, Adapter base; 205, Opening; 301, Simulator support plate; 302, Light source bracket; 303, Mounting base; 501, Cross-shaped dividing plate adapter; 502, Cross-shaped dividing lens; 503, Claw adapter. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0029] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, abutting connections, or integral connections. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0032] like Figure 1As shown, this embodiment provides a seeker zero-position calibration device, including a target simulator mechanism 100, a universal interface mechanism 200, and an upright support mechanism 300. The target simulator mechanism 100 and the universal interface mechanism 200 are respectively mounted on the upper and lower ends of the upright support mechanism 300. The universal interface mechanism 200 has a connecting part adapted to the mounting interface of the seeker 400 to be calibrated. The optical center of the target simulator mechanism 100 coincides with the mechanical axis of the connecting part. The mounting interface of the seeker 400 to be calibrated refers to the port connected to the missile body.

[0033] During calibration, the guide head 400 to be calibrated is connected to the connecting part of the universal interface mechanism 200 to ensure that the mechanical axis of the guide head 400 to be calibrated coincides with the mechanical axis of the connecting part of the universal interface mechanism 200. Then, after powering on the guide head 400 to be calibrated, the servo system of the guide head 400 to be calibrated is adjusted to control the internal optical field of view angle of the guide head 400 to ensure that the target is located at the center of the field of view of the guide head 400 to be calibrated. At this time, it can be confirmed that the mechanical axis of the guide head 400 to be calibrated coincides with the center of the optical field of view. The position of the inertial measurement system at this time is marked as zero, and the zero-position calibration of the guide head to be calibrated is completed. The seeker zero-position calibration device in this embodiment adopts an upright structure, which allows the seeker to be erected for zero-position calibration. It occupies little space and is easy to transport. At the same time, the seeker can be directly assembled through the universal interface mechanism 200, which solves the problem of large seeker assembly difficulty in existing horizontal seeker zero-position calibration devices. Moreover, the spatial distance between the target simulator mechanism 100 and the universal interface mechanism 200 is large, which can meet the zero-position calibration of seekers of different lengths and expand the application range.

[0034] In this embodiment, the target simulator mechanism 100 is mainly used to provide a simulated observation target at infinity. As a specific implementation method, such as... Figure 2 As shown, the target simulator mechanism 100 includes a light source assembly, a target plate 104, an off-axis reflector 102, and a reflector adjustment assembly. The light source assembly provides a light source, which can be emitted by a specific signal source. The light emitted by the light source is blocked and imaged by the target plate 104 and then hits the off-axis reflector 102. The off-axis reflector 102 reflects the light into parallel light and directs it to the connection part of the universal interface mechanism 200. The reflector adjustment assembly adjusts the position of the off-axis reflector 102 so that the central axis of the light reflected by the off-axis reflector 102 coincides with the mechanical axis of the connection part.

[0035] In some embodiments, such as Figure 2As shown, the light source assembly includes a bulb 107, a bulb holder 106, and a simulator mounting base 105. The bulb 107 is mounted on the bulb holder 106. Specifically, the bulb 107 can be fixed to the bulb holder 106 by dispensing adhesive. The bulb holder 106 and the target plate 104 are respectively fastened to both ends of the simulator mounting base 105 by threads. The target plate 104 has a round hole target with a very small diameter. The bulb 107 forms a point source for testing through the round hole target on the target plate 104. The position of the light source can be adjusted by adjusting the thread engagement depth between the target plate 104 and the simulator mounting base 105.

[0036] Preferably, a threaded hole 108 is reserved directly above the simulator mounting base 105. After the light source position is adjusted, the screw is screwed into the target plate 104 at the top dead center to avoid the light source position from shifting.

[0037] In some embodiments, such as Figure 2 As shown, the reflector adjustment assembly includes an adjustment base plate 103 and a reflector mounting base 101. The off-axis reflector 102 is mounted on the reflector mounting base 101. Specifically, the off-axis reflector 102 is mounted on the reflector mounting base 101 by three screws and two pins, and the connection is reinforced by adhesive. The reflector mounting base 101 is mounted on the adjustment base plate 103. Specifically, the reflector mounting base 101 is mounted on the adjustment base plate 103 by four screws. The reflector mounting base 101 has two sides for adjusting the horizontal angle of the off-axis reflector 102. The horizontal adjustment component can be, but is not limited to, an adjusting screw; the bottom surface of the adjusting base plate 103 and / or the reflector mounting base 101 is provided with a vertical adjustment component for adjusting the vertical angle of the off-axis reflector 102. The vertical adjustment component can be, but is not limited to, a shim. The vertical angle of the off-axis reflector 102 is adjusted by shimming the bottom surface of the adjusting base plate 103 and / or the reflector mounting base 101 with a copper shim. By adjusting the horizontal and vertical angles of the off-axis reflector 102, the optical center of the target simulator mechanism 100 is ensured to coincide with the mechanical axis of the universal interface mechanism 200.

[0038] As one specific implementation method, such as Figure 3As shown, the universal interface mechanism 200 includes an adapter 204 and a zero-position calibration adapter 201. The bottom of the adapter 204 is mounted on the upright support mechanism 300, and the zero-position calibration adapter 201 is mounted on the upper surface of the adapter 204. Specifically, the zero-position calibration adapter 201 mates with the shaft hole of the adapter 204 and is locked onto the adapter 204 by an axial screw. The connecting part 203 is disposed on the zero-position calibration adapter 201. Optionally, the connecting part 203 can be an annular boss structure protruding upward from the surface of the zero-position calibration adapter 201. Preferably, the connecting part 203 is coaxially arranged with the zero-position calibration adapter 201. The adapter 204 provides a standard interface. When the device is used in a compatible manner, it is only necessary to design the corresponding zero-position calibration adapter 201 according to the installation interface of different guide heads 400 to be calibrated. By replacing different zero-position calibration adapters 201, the installation and calibration operations of different guide heads 400 to be calibrated can be realized, which improves the versatility of the device.

[0039] Preferably, the zero-position calibration adapter plate 204 is equipped with a positioning pin 202 to ensure its roll angle relative to the adapter seat 204.

[0040] Since most of the guide heads have cables exiting from the rear, the adapter 204 is optimized to have a cylindrical structure. This ensures that the mounting surface of the zero-position calibration adapter plate 201 is at a certain height from the bottom surface of the adapter 204, facilitating the insertion and removal of the guide head signal output cable. Furthermore, an opening 205 is provided on the side wall of the adapter 204 to facilitate cable placement and operator operation during equipment debugging.

[0041] The upright support mechanism 300 provides an installation platform for the general interface mechanism 200 and the target simulator mechanism 100, ensuring that their positions are relatively fixed and will not shift significantly; as one specific implementation, such as Figure 4 As shown, the upright support mechanism 300 includes a light source support 302, a simulator support plate 301, and a mounting base 303. The simulator support plate 301 is mounted on the upper part of the light source support 302, the target simulator mechanism 100 is mounted on the simulator support plate 301, the bottom of the light source support 302 is fixedly mounted on the mounting base 303, and the universal interface mechanism 200 is mounted on the upper surface of the mounting base 303.

[0042] To reduce the errors caused by processing and assembly inside the upright support mechanism 300, the parallelism of the upper and lower end faces of the simulator support plate 301 is optimized to be no greater than 0.02mm, and the perpendicularity between the simulator support plate 301 on the light source bracket 302 and the mounting end face of the mounting base 303 is no greater than 0.03mm.

[0043] The simulator support plate 301 and the light source bracket 302 have been optimized to reduce weight without affecting structural strength. Specifically, the light source bracket 302 is designed as a hollow column structure with grooves on its side walls, reducing weight and facilitating equipment handling. The simulator support plate 301 can also be designed as a hollow column structure. The mounting base 303 has a notch identical to that of the adapter 204 for cable insertion / removal. The mounting base 303 also has several suitable countersunk holes for placing the positioning pins 202. While reducing weight, the overall device maintains a relatively low center of gravity, approximately 150mm above the ground, resulting in a total weight of only about 15KG.

[0044] In order to optimize the above technical solution, the seeker zero-position calibration device also includes a calibration mechanism, which is mainly used to calibrate the optical center of the target simulator mechanism 100 and the mechanical axis of the connecting part before the seeker zero-position calibration device is used. In order to avoid device calibration errors caused by stress deformation, the device needs to be calibrated regularly before and during use.

[0045] In some embodiments, such as Figure 5 As shown, the calibration mechanism includes a CCD camera 600, an industrial control computer 700, and a calibration component 500 with a crosshair cursor. The calibration component 500 is mounted on the universal interface mechanism 200, and the center of the crosshair cursor of the calibration component 500 is located on the mechanical axis of the universal interface mechanism 200. The CCD camera 600 is electrically connected to the industrial control computer 700, and the CCD camera 600 and the universal interface mechanism 200 are arranged coaxially. During calibration, the seeker zero-position calibration device is placed horizontally on a horizontal platform. The calibration component 500 is assembled on the adapter 204 of the universal interface mechanism 200. At the same time, the CCD camera 600 is placed on the same horizontal plane as the device. The distance between the imaging spot of the target simulator mechanism 100 and the crosshair position on the calibration component 500 is observed by the industrial control computer 700 connected to the CCD camera 600. By adjusting the reflector mounting base 101 and adjusting the position of the base plate 103, the center of the imaging spot and the crosshair of the calibration component 500 are ensured to coincide. This is considered as completing the calibration and ensuring the mechanical axis of the universal interface on the target source optical parallel adapter 204.

[0046] Specifically, such as Figure 6As shown, the calibration component 500 includes a cross-shaped splitting lens 502 with a crosshair, a cross-shaped splitting plate adapter 501, and a claw adapter 503. Since the position of the crosshair on the calibration component 500 directly affects the reliability of the device, the lens installation of the calibration component 500 also has very strict requirements. Specifically, the cross-shaped splitting lens 502 with the crosshair is bonded to the cross-shaped splitting plate adapter 501. The cross-shaped splitting plate adapter 501 and the claw adapter 503 are fastened with screws. In actual assembly and adjustment, the claw adapter 503 is fixed by a three-jaw chuck. The mounting end face of the cross-shaped splitting plate adapter 501 and the adapter seat 204 is perpendicular to the axis of the turntable, and the center of the cross-shaped splitting plate adapter 501 coincides with the center of the turntable. The installation position of the cross-shaped splitting lens 502 is tested and adjusted using a light source and lens to ensure that the eccentricity and tilt of the cross-shaped splitting lens 502 meet the usage requirements after bonding.

[0047] In summary, the zero-position calibration device for the guide head provided by this utility model can realize the calibration after the product is directly placed and installed. It is easy to install and enables a single person to quickly and safely perform zero-position calibration of the guide head equipment, improve the efficiency of the equipment calibration process, eliminate the potential risks to the equipment during the calibration process, and the device has a compact structure with small size and weight, reducing the cost of structural components and facilitating transportation and use.

[0048] The above examples are merely illustrative of the present invention and do not constitute a limitation on the scope of protection of the present invention. All designs that are the same as or similar to the present invention are within the scope of protection of the present invention.

Claims

1. A zero-position calibration device for a seeker head, characterized in that: It includes a target simulator mechanism, a universal interface mechanism, and an upright support mechanism. The target simulator mechanism and the universal interface mechanism are respectively installed at the upper and lower ends of the upright support mechanism. The universal interface mechanism has a connecting part that is adapted to the mounting interface of the guide head to be calibrated. The optical center of the target simulator mechanism coincides with the mechanical axis of the connecting part.

2. The zero-position calibration device for the guide head as described in claim 1, characterized in that: The target simulator mechanism includes a light source assembly, a target plate, an off-axis reflector, and a reflector adjustment assembly. The light emitted by the light source assembly passes through the target plate and is incident on the off-axis reflector. After being reflected by the off-axis reflector, it is directed towards the connection part of the universal interface mechanism. The reflector adjustment assembly is used to adjust the position of the off-axis reflector so that the central axis of the light reflected by the off-axis reflector coincides with the mechanical axis of the connection part.

3. The zero-position calibration device for the guide head as described in claim 2, characterized in that: The light source assembly includes a bulb, a bulb holder, and a simulator mounting base. The bulb is mounted on the bulb holder, and the bulb holder and the target plate are respectively threaded to both ends of the simulator mounting base.

4. The zero-position calibration device for the guide head as described in claim 2, characterized in that: The reflector adjustment assembly includes an adjustment base plate and a reflector mounting base. The off-axis reflector is mounted on the reflector mounting base, and the reflector mounting base is mounted on the adjustment base plate. The reflector mounting base has horizontal adjustment components on both sides for adjusting the horizontal angle of the off-axis reflector. The adjustment base plate and / or the bottom surface of the reflector mounting base has vertical adjustment components for adjusting the vertical angle of the off-axis reflector.

5. The zero-position calibration device for the guide head as described in claim 1, characterized in that: The universal interface mechanism includes an adapter base and a zero-position calibration adapter plate. The bottom of the adapter base is mounted on the upright support mechanism, the zero-position calibration adapter plate is mounted on the upper surface of the adapter base, and the connecting part is disposed on the zero-position calibration adapter plate.

6. The zero-position calibration device for the guide head as described in claim 5, characterized in that: The adapter is a cylindrical structure, and an opening is provided on the side wall of the adapter.

7. The zero-position calibration device for the guide head as described in claim 1, characterized in that: The upright support mechanism includes a light source support, a simulator support plate, and a mounting base. The simulator support plate is installed on the upper part of the light source support, and the bottom of the light source support is fixedly installed on the mounting base. The parallelism between the upper and lower end faces of the simulator support plate is no greater than 0.02 mm, and the perpendicularity between the simulator support plate on the light source support and the mounting end face of the mounting base is no greater than 0.03 mm.

8. The zero-position calibration device for the guide head as described in claim 7, characterized in that: The light source bracket is a hollow column structure, and the side wall of the light source bracket is provided with a groove.

9. The zero-position calibration device for the guide head as described in claim 1, characterized in that: It also includes a calibration mechanism for aligning the optical center of the target simulator mechanism with the mechanical axis of the connecting part.

10. The seeker zero-position calibration device as described in claim 9, characterized in that: The calibration mechanism includes a CCD camera, an industrial control computer, and a calibration component with a crosshair cursor. The calibration component is mounted on the universal interface mechanism, and the center of the crosshair cursor of the calibration component is located on the mechanical axis of the universal interface mechanism. The CCD camera is electrically connected to the industrial control computer, and the CCD camera and the universal interface mechanism are arranged coaxially.

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