A hemispherical arc scanning test stand for laser countermeasure tests

Abstract

The present invention provides a hemispherical arc scanning test stand that can be used for laser confrontation testing, comprising at least two gear rings, the same number of gear ring bases, and at least the same number of cameras. The gear rings are semicircular structures, and the radii of different gear rings are different. Each gear ring is mounted on a gear ring base, and the gear ring bases are coaxially mounted and rotate around an axis driven by a motor. Each gear ring is equipped with at least one mounting base for mounting a camera. The mounting base is also equipped with a drive motor and a gear. The gear meshes with the gear ring and rotates under the action of the drive motor, driving the mounting base to move on the gear ring. During the movement, the camera always points to the center of the gear ring. The scanning device of the present invention has a large motion span, high positioning accuracy, and strong repeatability. It can simultaneously adjust the angle between the inner and outer rings and position the scanning device at any angle in the air, and can also ensure that the device always points to the center of the object to be tested.

Description

Technical Field

[0001] The invention relates to a device for reliability identification of laser countermeasure equipment, which is suitable for performance testing of laser interference imaging reconnaissance / guidance equipment and laser warning equipment. Background Art

[0002] Laser jamming equipment is a device that emits lasers at optoelectronic reconnaissance / guidance equipment to prevent or weaken its ability to intercept intelligence information or cause it to lose its function. Anti-laser jamming tests on reconnaissance and guidance equipment and evaluation of the laser jamming effectiveness of laser jamming equipment have always been the focus of test and identification.

[0003] However, existing laser capture devices are susceptible to significant external interference, especially under varying light intensities. The characteristics of laser interference imaging urgently require analysis. Current laser identification can only be performed outdoors, which is significantly affected by the environment and takes a long time. Furthermore, the capture process requires moving the camera, which incurs significant labor costs. Other existing brackets generally suffer from limitations such as small spans and low centering accuracy, making it difficult to simulate wide-angle testing from 0 to 180°. Furthermore, existing brackets typically have a fixed inner and outer ring angle, making it difficult to achieve adjustable angles. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology, the present invention provides a hemispherical arc scanning test frame that can be used for laser confrontation tests. It can install two devices (generally light sources or cameras) to move freely in the hemispherical area and ensure that the devices always point to the center. The present invention adopts digital control to achieve automatic positioning of the suspended equipment, shorten the identification project time, reduce the impact of the environment on the identification, and reduce the labor cost of the identification.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a hemispherical arc scanning test frame that can be used for laser confrontation test, including at least two gear rings, the same number of gear ring bases and at least the same number of cameras.

[0006] The gear ring is a semicircular structure, and the radius of different gear rings is different; each gear ring is installed on a gear ring base, and the outer diameter of each gear ring base is different; each gear ring base is coaxially installed and rotates around the axis under the drive of the motor; each gear ring is equipped with at least one mounting base for mounting a camera, and a driving motor and a gear are also installed on the mounting base. The gear is engaged with the gear ring and rotates under the action of the driving motor, driving the mounting base to move on the gear ring. During the movement, the camera always points to the center of the gear ring.

[0007] At least two mutually perpendicular rolling bearings are also installed on the mounting base. One rolling bearing cooperates with the gear to limit the radial position of the mounting base on the gear ring, and the other rolling bearing limits the position of the mounting base axially in the gear ring.

[0008] Each of the gear ring bases is respectively fixedly connected to a different hollow main shaft, and the main shafts are coaxially nested. Each main shaft is connected to a motor through a gear set, and drives the gear ring base to rotate under the drive of the motor.

[0009] A fixed turntable spindle is installed at the center of each spindle. The top end of the turntable spindle is located at the original center position of each gear ring and is used to place the object to be measured.

[0010] The plane where the gear ring is located maintains a set distance from the main axis of the turntable. The length of the distance is the distance between the optical axis of the camera and the gear ring plane, ensuring that the center of the camera motion trajectory coincides with the center of the object to be measured.

[0011] The gear ring is provided with a zero position switch as a starting point, and the position of the camera on the gear ring is determined according to the motor rotation angle and the transmission ratio, and the camera is triggered to work after being driven to the specified position.

[0012] The beneficial effects of the present invention are: the scanning device has a large motion span, high positioning accuracy, strong repeatability, and can adjust the angle between the inner and outer circles, can position the device at any angle in the air, and can ensure that the device always points to the center of the test frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention;

[0014] Figure 2 It is a structural diagram of the inner ring motion mechanism;

[0015] Figure 3 It is a structural diagram of a camera mechanism with a camera mounted on a gear ring;

[0016] Figure 4 It is a structural diagram of the base;

[0017] Figure 5 It is a structural diagram of the inner and outer ring bases;

[0018] Figure 6 This is the installation diagram of the inner and outer rings and the inner and outer ring bases;

[0019] Figure 7 This is a schematic diagram of the installation of the upper and lower frames;

[0020] Figure 8 It is a structural diagram of the fixed base;

[0021] Figure 9 It is an operational flow chart of the present invention;

[0022] Figure 10It is a schematic top view of the eccentric installation of the inner and outer gear rings, where (a) is the inner and outer gear ring angle of 0°, (b) is the inner and outer gear ring angle of 45°, and (c) is the inner and outer gear ring angle of 90°. DETAILED DESCRIPTION

[0023] The present invention is further described below with reference to the accompanying drawings and examples. The present invention includes but is not limited to the following examples.

[0024] The present invention comprises three parts: an inner ring 1, an outer ring 2, and a base 3. The inner ring 1 is located inside the hemispherical arc scanning test frame, while the outer ring 2 is located outside the hemispherical arc scanning test frame. Both the inner ring 1 and the outer ring 2 are fixed to the base 3. The inner ring 1 is connected to the inner ring base 3-2, and the outer ring 2 is connected to the outer ring base 3-3. The turntable 3-1 serves as a storage area for the test piece. The inner ring 1 includes a drive motor 1-1, a pinion 1-2, a rolling bearing 1-3, rolling bearings 1-4 and 1-5, a drive motor mounting base 1-6, a pendant mounting seat 1-7, an outer gear ring 1-8, and a pendant 1-9 (camera). The drive motor 1-1 is mounted on the drive motor mounting base 1-6 and connected to the pinion 1-2. The pinion 1-2 meshes with the outer gear ring 1-8. Driven by the motor 1-1, the pinion 1-2 rotates, thereby achieving movement of the pendant on the arc scanning test frame and ensuring that the pendant 1-9 always points to the center of the base 3. The bearing 1-3 is mounted on the drive motor mounting base 1-6, and cooperates with the bearing 1-4 mounted on the base plate 1-7 of the fixed suspension above the boss of the outer gear ring 1-8, thereby realizing the positioning of the inner ring motor 1-1, ensuring that it is not easy to fall off the outer gear ring, and reducing the friction resistance through the bearing 1-5.

[0025] The base 3 includes a turntable 3-1, an inner ring base 3-2, an outer ring base 3-3, a fixed base 3-4, a driving motor 3-5 of the inner ring base 3-2, a driving motor 3-6 of the outer ring base 3-3 and a turntable transmission system 4.

[0026] In the turntable part, the turntable 3-1 is connected to the turntable spindle 4-1 by bolts, and the spindle 4-1 is fixed to the support frame 3-4 by bolts. There are bearings 4-2 and 4-3 at both ends of the spindle 4-1. The inner ring of the bearing cooperates with the spindle 4-1, and the outer ring of the bearing cooperates with the spindle 4-4, thereby ensuring that the spindle 4-4 rotates and the spindle 4-1 does not move.

[0027] Motor 3-6 drives the inner ring base 3-2 of inner ring 1. Motor 3-6 rotates gear 4-6 via gear 4-5. Gear 4-6 is fixed to spindle 4-4, which is supported by bearings 4-7 and 4-8. Spindle 4-4 is connected to inner ring base 3-2. When motor 3-6 rotates, inner ring base 3-2 rotates with it, driving inner ring 1 with it. Because the connection between spindle 4-4 and outer ring base 3-3 contains two bearings 4-9 and 4-10, the inner rings of bearings 4-9 and 4-10 are connected to spindle 4-4, while the outer rings of bearings 4-9 and 4-10 are connected to outer ring base 3-3, spindle 4-4 rotates while outer ring base 3-3 remains stationary. This design allows for separate control of inner ring base 3-2 and outer ring base 3-3.

[0028] Motor 3-5 is the driving motor of the outer ring base 3-3 of the outer ring 2. Motor 3-5 drives gear 4-12 to rotate through gear 4-11. Gear 4-12 is connected to the outer ring base 3-3. The inner ring of gear 4-12 is equipped with bearing 4-9 and the outer ring of bearing 4-10, thereby realizing the rotation of gear 4-12, but the main shaft 4-1 and main shaft 4-4 do not move.

[0029] The angle between the two suspension devices mounted on the inner ring and the outer ring of the present invention can be arbitrarily changed within 0 to 90 degrees according to the user's requirements. Compared with a turntable with a degree of freedom of 1, it can obtain a larger range of motion and complete more flexible work tasks.

[0030] To improve the load-bearing capacity of this product, the gear sets of both the inner and outer rings adopt a reduction drive mode, with a reduction ratio of 3:1. For ease of processing, the gear module is uniformly selected to be 3 and the pressure angle is 15°.

[0031] During assembly, in order to ensure that the camera is always aligned with the center of the circular workbench, the two gear rings need to be installed at the eccentric position of the workbench, and they must not coincide with the center of the circle, so as to ensure that the center of the camera's motion trajectory coincides with the center of the circular workbench. Figure 10 As the inner and outer rings rotate along the center of the workbench, the eccentric mounting solution ensures that the camera is always aligned with the center of the workbench.

[0032] The present invention can control the rest position of the cameras on the inner ring and the outer ring respectively, and always keep the cameras pointing to the central platform. The present invention can control the rotational angular velocity of the inner ring and the outer ring respectively.

[0033] The present invention can realize a one-key return to zero function by setting a control program, that is, the inner and outer rings are driven by a motor to automatically return to zero.

[0034] The present invention can preset several positions of the camera on the inner ring and the outer ring. By installing a zero position switch as the starting point on the inner and outer gear rings respectively, it can be known whether the camera has reached the position according to the motor angle and transmission ratio, and the camera is triggered to work after being driven to the specified position.

[0035] The operation process of the present invention is as follows Figure 9 As shown, the following steps are included:

[0036] a) Power on the device.

[0037] b) Clear the operating table. The operating table must be cleared before the device is reset to zero.

[0038] c) Return the device to zero. Click the "Return to Zero" button on the screen and the device will automatically return to zero. When the return to zero is complete, a pop-up window will appear indicating "Return to Zero Successful."

[0039] d) Fix the object to be tested. Install and fix the object to be tested on the turntable to be tested.

[0040] e) Motion parameter settings: Set the inner and outer camera stop positions and the inner and outer rotation angular velocities.

[0041] f) Mode selection: Choose to have the camera stop for one shot or shoot at several locations as needed.

[0042] g) Start the action. Click the "Start" button and the device will automatically run according to the selected mode.

[0043] h) Stop. Wait for the equipment to come to a complete stop before starting subsequent tests.

[0044] i) Power off the equipment. The equipment must be powered off after the test.

Claims

1. A hemispherical arc scanning test stand for laser countermeasure testing, comprising at least two gear rings, the same number of gear ring bases, and at least the same number of cameras, characterized in that: The gear ring is a semicircular structure, and the radius of different gear rings is different; each gear ring is installed on a gear ring base, and the outer diameter of each gear ring base is different; each gear ring base is coaxially installed and rotates around the axis under the drive of the motor; each gear ring is equipped with at least one mounting base for mounting a camera, and a driving motor and a gear are also installed on the mounting base. The gear is engaged with the gear ring and rotates under the action of the driving motor, driving the mounting base to move on the gear ring. During the movement, the camera always points to the center of the gear ring.

2. The hemispherical arc scanning test stand for laser confrontation test according to claim 1, characterized in that: At least two mutually perpendicular rolling bearings are also installed on the mounting base. One rolling bearing cooperates with the gear to limit the radial position of the mounting base on the gear ring, and the other rolling bearing limits the position of the mounting base axially in the gear ring.

3. The hemispherical arc scanning test stand for laser confrontation test according to claim 1, characterized in that: Each of the gear ring bases is respectively fixedly connected to a different hollow main shaft, and the main shafts are coaxially nested. Each main shaft is connected to a motor through a gear set, and drives the gear ring base to rotate under the drive of the motor.

4. The hemispherical arc scanning test stand for laser confrontation test according to claim 3, characterized in that: A fixed turntable spindle is installed at the center of each spindle. The top of the turntable spindle is located at the original center position of each gear ring and is used to place the object to be measured.

5. The hemispherical arc scanning test stand for laser confrontation test according to claim 1, characterized in that: The plane where the gear ring is located maintains a set distance from the main axis of the turntable. The length of the distance is the distance between the optical axis of the camera and the gear ring plane, ensuring that the center of the camera motion trajectory coincides with the center of the object to be measured.

6. The hemispherical arc scanning test stand for laser confrontation test according to claim 1, characterized in that: The gear ring is provided with a zero position switch as a starting point, and the position of the camera on the gear ring is determined according to the motor rotation angle and the transmission ratio, and the camera is triggered to work after being driven to the specified position.

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