An embedded conformal array calibration device and method

Abstract

This application provides an embedded conformal array calibration device and method. The device includes: a base, a pad, a wedge, a protective plate, and a reference plane mirror. The pad and the protective plate are respectively installed on two sides of the base, and the wedge is installed on the top surface of the base. The reference plane mirror is installed at the pad. The base is integrally formed with a hollow inner cavity. The calibration method of this application does not rely on external resources, reducing the difficulty of calibration and simplifying the calibration steps.

Description

Technical Field

[0001] This application relates to the field of electronic device structure technology, and in particular to an embedded conformal array calibration device and method. Background Technology

[0002] Array calibration is an important part of array development, testing, and use. Its purpose is to check and adjust the mechanical and electrical zero points of the array to meet the design specifications. Array calibration typically includes two parts: mechanical axis calibration and electrical axis calibration.

[0003] For a phased array, the mechanical axis pointing direction is the pointing direction of the antenna at the front of the array. Array mechanical axis calibration refers to ensuring that the antenna pointing direction meets certain azimuth and elevation angle requirements. Currently, the calibration methods for shipborne phased array equipment mainly include tower calibration, synchronization satellite calibration, towerless calibration, and calibration based on curve fitting.

[0004] Existing calibration methods are complex and neglect shipboard environment and operating conditions. When the phased array equipment is installed on board for testing, limitations often prevent static calibration in dry dock. Furthermore, the test vessel experiences significant swaying when docked, and there are no available reference points or calibration towers around the dock, rendering optical calibration methods unsuitable. Additionally, some phased arrays are mounted on the ship using an embedded wall-mounted installation. After installation, a radome needs to be installed at the antenna front end to conform to the ship's design and protect the antenna. Calibration of all shipboard equipment follows this process, but once the radome is installed, antenna pointing cannot be measured.

[0005] Therefore, how to make the antenna pointing measurable without relying on external resources has become the key problem in calibrating such phased array surfaces. Summary of the Invention

[0006] This application provides an embedded conformal array calibration device and method, which can be used to solve the technical problem that antenna pointing measurement requires external resources.

[0007] This application provides an embedded conformal array calibration device, the device comprising:

[0008] Base, pad, wedge, protective plate, reference plane mirror;

[0009] Pads and protective plates are installed on the two sides of the base, and inclined blocks are installed on the top surface of the base;

[0010] The reference plane mirror is installed at the pad;

[0011] The base is integrally molded with a hollow inner cavity;

[0012] The roughness of each mounting surface of the base shall not exceed 1.6, and the flatness shall be grade 7.

[0013] Optionally, the base includes two first mounting surfaces, a second mounting surface, and a third mounting surface, which correspond to the mounting pad, the inclined block, and the side wall of the array device, respectively.

[0014] The two first mounting surfaces are symmetrical; one is used to mount the reference plane mirror, and the other is used to mount the protective plate to protect the first mounting surfaces.

[0015] The second mounting surface has markings in four directions: "0°, 90°, 180°, 270°", to indicate the installation direction of the wedge block.

[0016] Optionally, the pad may include one mounting surface and two mounting surfaces;

[0017] Among them, one mounting surface is fixedly connected to the first mounting surface of the pad and the base with screws;

[0018] The second mounting surface is used to mount the reference plane mirror;

[0019] The angle between the first and second mounting surfaces is A°; A° is the tilt angle of the array equipment after it is installed on the ship;

[0020] One mounting surface has flatness accuracy requirements, and the other mounting surface has flatness and tilt accuracy requirements to ensure the installation accuracy of the reference plane mirror;

[0021] The surface roughness of each mounting surface of the pad does not exceed 1.6, the flatness is grade 7, and the inclination of the two mounting surfaces is grade 7.

[0022] Optionally, the inclined block may include mounting surface one and mounting surface two;

[0023] Mounting surface one is used for screw fixing connection between the wedge block and the second mounting surface of the base;

[0024] Mounting surface three is used during the ship-wide calibration process to place a level and measure the levelness of the inclined block relative to the ship's reference plane.

[0025] The mounting surface has markings in four directions: "0°, 90°, 180°, and 270°" to indicate the installation direction of the array calibration device.

[0026] The angle between mounting surface one and mounting surface two is B°, where B° is the tilt angle of the array equipment after it is installed on the ship.

[0027] Mounting surface one has flatness accuracy requirements, and mounting surface two has flatness and tilt accuracy requirements to ensure the accuracy of the horizontality of the inclined block during the calibration of the entire ship;

[0028] The roughness of each mounting surface of the inclined block does not exceed 1.6, the flatness is grade 7, and the inclination of mounting surface two is grade 7.

[0029] Optionally, the protective plate's dimensions are the same as the first mounting surface of the base.

[0030] Optionally, the reference plane mirror has a mirror diameter of 80mm, a thickness of 9mm, and a vacuum-plated silver external reflective film on the reflective surface, with an installation error accuracy of no more than 1'.

[0031] The bracket is equipped with a sealed protective cover. During non-calibration periods, the reference plane mirror is covered with the sealed protective cover to protect the mirror surface.

[0032] The base of the reference plane mirror has four 30° wide, 7-inch waist-shaped grooves, evenly distributed on a 120mm circumference.

[0033] The reference plane mirror is fixed by four M6 hex head bolts.

[0034] When calibrating the mechanical shafts of the entire ship, the normal of the protective mirror of the reference plane mirror is used to replace the azimuth and elevation of the antenna at the front end of the array to obtain the antenna array pointing parameters.

[0035] This application also provides a method for calibrating a conformal array surface, which involves connecting the array surface calibration device to the array surface frame via shafts and screws, fixing the array surface equipment on a coordinate measuring machine platform, measuring the coordinates of several points on the reference platform using probes on the detector, and establishing a reference plane.

[0036] The probe on the detector measures the coordinates of several points on the inclined block mounting surface 1, constructs a plane, and projects the normal of the reference plane and the normal of the inclined block mounting surface 1 onto the vertical plane to measure the levelness of the mounting surface 1 relative to the reference plane. If the accuracy requirements are not met, the levelness is adjusted by rotating the base. Each adjustment is measured with a coordinate measuring machine until the requirements are met. At this point, the positioning pins are installed using the two pin holes on the base to lock the array calibration device, and then the screws are tightened.

[0037] The probe on the detector measures the coordinates of several points on the reference platform and the second inclined block mounting surface. Planes are constructed respectively, and the normals of the two planes are projected vertically to calculate the inclination of the second inclined block mounting surface. If the accuracy requirements are not met, the inclination is adjusted by adjusting the mounting screws. Each adjustment is measured with a coordinate measuring machine until the accuracy requirements are met. The inclination is used to check the levelness of the second inclined block mounting surface relative to the ship's reference plane after installation.

[0038] The probe on the detector measures the coordinates of several points on the front plane of the array and the mirror surface of the reference plane mirror. Planes are constructed respectively, and the normals of the two planes are projected in the horizontal and vertical directions. The error accuracy of the normal of the reference plane mirror and the normal of the front plane of the array in the azimuth and elevation directions is calculated. If the accuracy requirement is not met, the mounting screws of the pad are adjusted, and the measurement and calculation are repeated until the accuracy requirement is met. The results are recorded.

[0039] The array calibration device designed in this application converts the array mechanical axis calibration, which solves the problem that the antenna pointing cannot be measured after the equipment is installed on the ship due to the installation of the radome.

[0040] The calibration method in this application does not rely on external resources, which reduces the difficulty of calibration and simplifies the calibration process;

[0041] The array calibration device designed in this application only requires redesigning and replacing the pads when the shipboard tilt angle changes for the same equipment, thus reducing costs.

[0042] This application has applicability and design reference value for the mechanical axis calibration of similar shipborne phased array surfaces. Attached Figure Description

[0043] Figure 1 Assembly diagram of the array surface calibration device provided in the embodiments of this application;

[0044] Figure 2 A base diagram provided for an embodiment of this application;

[0045] Figure 3 A diagram of the pad block provided in the embodiments of this application;

[0046] Figure 4 A slanted block diagram provided for embodiments of this application;

[0047] Figure 5 Protection board diagram provided for embodiments of this application;

[0048] Figure 6 A schematic diagram of a reference plane mirror provided in an embodiment of this application;

[0049] Figure 7 A view of the array calibration device provided in the embodiments of this application mounted on a phased array;

[0050] Figure 8 A diagram showing the array device tilted at 15° according to an embodiment of this application;

[0051] Figure 9 Provided for the embodiments of this application Figure 7 One of the magnified views of a section;

[0052] Figure 10 Provided for the embodiments of this application Figure 7 The second enlarged view of a part. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0054] The following section will first combine the appendix. Figure 1 The embodiments of this application will be described.

[0055] This application provides an embedded conformal array calibration device, the device comprising:

[0056] 1. Base; 2. Pad; 3. Inclined block; 4. Protective plate; 5. Reference plane mirror;

[0057] Pad 2 and protective plate 4 are respectively installed on the two sides of base 1, and inclined block 3 is installed on the top surface of base 1;

[0058] The reference plane mirror 5 is installed at the pad 2;

[0059] The base 1 is integrally molded with a hollow inner cavity, which reduces weight while ensuring strength and rigidity;

[0060] The roughness of each mounting surface of the base 1 shall not exceed 1.6, and the flatness shall be grade 7.

[0061] The pad 2 and the inclined block 3 are fixedly connected to the two mounting surfaces of the base 1 by screws respectively. The protective plate 4 is used to protect the mounting surface of the base. The reference plane mirror 5 is installed on the pad 2 by screws. The horizontality of the array calibration device is adjusted by the shaft cooperation between the base 1 and the array device. After meeting the accuracy requirements, the base 1 is fixedly connected to the side wall of the array by positioning pins and screws.

[0062] The base 1 includes two first mounting surfaces 1-1, a second mounting surface 1-2, and a third mounting surface 1-3, which correspond to the mounting pad 2, the inclined block 3, and the side wall of the array device 6, respectively.

[0063] The two first mounting surfaces 1-1 are symmetrical, allowing the reference plane mirror 5 to be installed on either the left or right side of the array equipment depending on the on-site loading conditions. This symmetrical design ensures that the calibration device can be flexibly installed on either side of the array, even under demanding loading conditions. One surface is used to install the reference plane mirror 5, and the other is used to install the PTFE protective plate 4, which protects the first mounting surface 1-1.

[0064] The first mounting surface 1-1 has high precision requirements for flatness and perpendicularity to ensure the installation accuracy of the final reference plane mirror 5;

[0065] The second mounting surface 1-2 is marked with engraved lines in four directions: "0°, 90°, 180°, 270°" to indicate the installation direction of the inclined block 3. The mounting surface 1-2 has precision requirements for flatness and verticality to ensure the horizontality of the inclined block 3 relative to the ship's reference plane during the calibration of the entire ship, and ultimately ensure the accuracy of the reference plane mirror 5 in measuring azimuth and pitch.

[0066] The third mounting surface 1-3 has high flatness requirements to ensure that the calibration device installed on the array equipment 8 meets the accuracy requirements for azimuth and levelness.

[0067] Meanwhile, since the mounting surfaces are perpendicular to each other and their installation accuracy affects each other, the perpendicularity between the mounting surfaces must be guaranteed. The design requires that the perpendicularity of the mounting surfaces after processing must be guaranteed to be at level 7, so as to ensure the accuracy of the normal direction of the inclined surface after the pad and the inclined block are installed.

[0068] The pad 2 includes a mounting surface 2-1 and a second mounting surface 2-2;

[0069] Among them, a mounting surface 2-1 is fixedly connected to the first mounting surface 1-1 of the pad 2 and the base 1 with screws;

[0070] Mounting surface 2-2 is used for mounting the reference plane mirror 5;

[0071] The angle between mounting surface 2-1 and mounting surface 2-2 is A°; A° is the tilt angle of the phased array equipment after it is installed on the ship. For the phased array equipment in this example [8], A = 15°.

[0072] Mounting surface 2-1 has flatness accuracy requirements, and mounting surface 2-2 has flatness and tilt accuracy requirements to ensure the installation accuracy of the reference plane mirror 5.

[0073] The surface roughness of each mounting surface of pad 2 shall not exceed 1.6, the flatness shall be grade 7, and the inclination of the second mounting surface 2-2 shall be grade 7.

[0074] The pad 2 adopts a structural design conforming to the reference plane mirror, and the mounting surfaces are designed with mutual tilt angles. The tilt angle is consistent with the tilt angle of the array equipment on the ship, ensuring that the reference plane mirror is parallel to the ship's reference plane after installation, which greatly facilitates instrument measurements during calibration. To ensure the measurement accuracy of the azimuth and elevation angles of the array equipment after the reference plane mirror is installed, that is, to ensure the accuracy of converting the antenna pointing angle measurement at the front end of the array into the normal measurement of the reference plane mirror surface, the design requires that the roughness of each mounting surface after machining does not exceed 1.6, the flatness is guaranteed to be grade 7, and the tilt angle of the tilted surface must also be guaranteed to be grade 7 after machining.

[0075] The inclined block 3 includes mounting surface 3-1 and mounting surface 3-2;

[0076] Mounting surface 3-1 is used for screw fixing connection between the inclined block 3 and the second mounting surface 1-2 of the base 1;

[0077] Mounting surface 3-3 is used during the ship-wide calibration process to place a level and measure the levelness of the inclined block 3 relative to the ship's reference plane.

[0078] The mounting surface has markings in four directions: "0°, 90°, 180°, and 270°" to indicate the installation direction of the array calibration device.

[0079] The angle between mounting surface 1 3-1 and mounting surface 2 3-2 is B°, where B° is the tilt angle of the phased array equipment after it is installed on the ship. For the phased array equipment 8 in this example, B = 15°, that is, in the design, A = B = the tilt angle of the phased array equipment.

[0080] Mounting surface 1 3-1 has flatness accuracy requirements, and mounting surface 2 3-2 has flatness and tilt accuracy requirements to ensure the accuracy of the horizontality of the inclined block 3 during the calibration of the entire ship;

[0081] The roughness of each mounting surface of the inclined block 3 shall not exceed 1.6, the flatness shall be grade 7, and the inclination of mounting surface 3-2 shall be grade 7.

[0082] The mounting surfaces of the inclined block 3 are designed with mutual inclination angles, which are consistent with the inclination angle of the array equipment. This ensures that after the array equipment is installed on the ship, the inclined surface of the inclined block is parallel to the horizontal plane of the ship's deck coordinate system. During ship-wide calibration, a level can be used instead of an inclinometer, greatly facilitating instrument measurement. To ensure the accuracy of the inclined block's levelness relative to the ship's reference plane, the design requires that the surface roughness of each mounting surface after machining does not exceed 1.6, the flatness is guaranteed to be grade 7, and the inclination of the inclined surface must also be guaranteed to be grade 7 after machining.

[0083] The protective plate 4 has the same external dimensions as the first mounting surface 1-1 of the base 1, and maintains an aesthetically pleasing appearance after installation. It is made of polytetrafluoroethylene, which is lightweight and easy to process.

[0084] The mirror 5-1 of the reference plane mirror 5 is a precision instrument with a mirror diameter of 80mm and a thickness of 9mm. The reflective surface is a vacuum-plated silver external reflective film, and the installation error accuracy is no greater than 1'.

[0085] During installation, the mirror must not be wiped with hands or other objects to ensure the testing accuracy of the mirror surface. The plane mirror is installed in an adjustable spherical support bracket, and the angle of the mirror surface normal can be adjusted using four symmetrical adjusting screws. The bracket is equipped with a sealed protective cover 5-2. During non-calibration periods, the reference plane mirror 5 is covered with the sealed protective cover 5-2 to protect the mirror surface 5-1.

[0086] The base of the reference plane mirror 5 has four 30° wide 7-inch waist grooves, evenly distributed on a Φ120 circumference;

[0087] When installing the reference plane mirror 5, use 4 M6 hex head bolts for installation and fixation;

[0088] When calibrating the mechanical shaft of the entire ship, the normal of the protective mirror 5-1 of the reference plane mirror 5 is used to replace the azimuth and elevation of the antenna at the front end of the array to obtain the antenna array pointing parameters.

[0089] This application also provides a method for calibrating conformal array surfaces.

[0090] First, clean the primary reference platform of the coordinate measuring machine to ensure that the level of the measuring platform meets the requirements.

[0091] Connect the array calibration device to the array frame via shaft 6 and screws, fix the array equipment on the coordinate measuring machine platform, use the probe on the detector to measure the coordinates of several points on the reference platform, and establish the reference plane.

[0092] The probe on the detector measures the coordinates of several points on the mounting surface 3-1 of the inclined block 3, constructs a plane, and projects the normal of the reference plane and the normal of the mounting surface 3-1 of the inclined block 3 onto the vertical plane to measure the levelness of the mounting surface 3-1 relative to the reference plane. If the accuracy requirements are not met, the levelness is adjusted by rotating the base 1. Each adjustment is measured with a coordinate measuring machine until the requirements are met. At this time, the positioning pin 7 is installed in the two pin holes on the base 1 to lock the array calibration device, and then it is tightened with screws.

[0093] The probe on the detector measures the coordinates of several points on the reference platform and the mounting surface 3-2 of the inclined block 3. Planes are constructed respectively, and the normals of the two planes are projected vertically to calculate the inclination of the mounting surface 3-2 of the inclined block. If the accuracy requirements are not met, the inclination is adjusted by adjusting the mounting screws. Each adjustment is measured with a coordinate measuring machine until the requirements are met. This data is used for the levelness check of the array equipment 8 after it is installed on the ship.

[0094] The probe on the detector is used to measure the coordinates of several points on the front plane of the array and the mirror surface 5-1 of the reference plane mirror. Planes are constructed for each plane, and the normals of the two planes are projected horizontally and vertically respectively. The azimuth and elevation errors between the normal of the reference plane mirror surface 5-1 and the normal of the front plane of the array are calculated. If the accuracy requirements are not met, the mounting screws of the shim 2 are adjusted, and the measurements and calculations are repeated until the requirements are met. Record the results. After this, the relevant structural components at the front of the array should not be disassembled or reassembled, and the array equipment 8 should be protected from external impacts; otherwise, the array calibration device needs to be recalibrated.

[0095] During the calibration of the array's mechanical axis, the antenna pointing at the front of the array is switched to the reference plane mirror. The angle between the reference plane mirror and the antenna pointing at the front of the array must meet certain error accuracy requirements. In addition to assembly errors, the errors mainly come from the structural components that mount the reference plane mirror. Therefore, error allocation is performed on the base, pads, and wedges. By controlling the tolerance accuracy of the structural components, the cumulative error after assembly meets the requirements.

[0096] In the embodiments of this application, the flatness, perpendicularity, and tilt of the mounting surfaces of the base, pad, and inclined block are designed to ensure the pointing accuracy of the reference plane mirror.

[0097] The array calibration device designed in this application converts the array mechanical axis calibration, which solves the problem that the antenna pointing cannot be measured after the equipment is installed on the ship due to the installation of the radome.

[0098] The calibration method in this application does not rely on external resources, which reduces the difficulty of calibration and simplifies the calibration process;

[0099] The array calibration device designed in this application only requires redesigning and replacing the pads when the shipboard tilt angle changes for the same equipment, thus reducing costs.

[0100] This application has applicability and design reference value for the calibration of mechanical axes of similar shipborne phased array surfaces. The embodiments described above do not constitute a limitation on the scope of protection of this application.

Claims

1. A conformal array calibration device, characterized in that, The device includes: Base (1), pad (2), inclined block (3), protective plate (4), reference plane mirror (5); Pad (2) and protective plate (4) are respectively installed on the two sides of the base (1), and inclined block (3) is installed on the top surface of the base (1); The reference plane mirror (5) is installed at the pad (2); The base (1) is integrally formed with a hollow inner cavity; The roughness of each mounting surface of the base (1) shall not exceed 1.6, and the flatness shall be grade 7. The pad 2 adopts a structural appearance design that conforms to the reference plane mirror (5), and the mounting surfaces are designed to be inclined at each other, with the tilt angle consistent with the tilt angle of the array equipment on the ship; The pad (2) includes a mounting surface (2-1) and a second mounting surface (2-2); The angle between the first mounting surface (2-1) and the second mounting surface (2-2) is A°; The inclined block (3) includes mounting surface one (3-1) and mounting surface two (3-2); The angle between mounting surface one (3-1) and mounting surface two (3-2) is B°; A = B = the tilt angle of the array equipment after it is loaded onto the ship.

2. The embedded conformal array calibration device according to claim 1, characterized in that, The base (1) includes two first mounting surfaces (1-1), a second mounting surface (1-2), and a third mounting surface (1-3), which correspond to the mounting pad (2), the inclined block (3), and the side wall of the array device (6), respectively; Among them, the two first mounting surfaces (1-1) are symmetrical, one is used to install the reference plane mirror (5), and the other is used to install the protective plate (4); to protect the first mounting surface (1-1); The second mounting surface (1-2) is marked with engraved lines in four directions: "0°, 90°, 180°, 270°", which are used to indicate the mounting direction of the inclined block (3).

3. The embedded conformal array calibration device according to claim 1, characterized in that, The mounting surface (2-1) of the pad (2) is fixedly connected to the first mounting surface (1-1) of the base (1) by screws; The second mounting surface (2-2) is used to mount the reference plane mirror (5); The first mounting surface (2-1) has flatness accuracy requirements, and the second mounting surface (2-2) has flatness and tilt accuracy requirements to ensure the installation accuracy of the reference plane mirror (5); The roughness of each mounting surface of the pad (2) shall not exceed 1.6, the flatness shall be grade 7, and the inclination of the two mounting surfaces (2-2) shall be grade 7.

4. The embedded conformal array calibration device according to claim 1, characterized in that, Mounting surface 1 (3-1) is used for screw fixing connection between the inclined block (3) and the second mounting surface (1-2) of the base (1); Mounting surface three (3-3) is used for placing a level instrument and measuring the levelness of the inclined block (3) relative to the ship's reference plane during the ship's calibration. Mounting surface two (3-2) has engraved lines in four directions: 0°, 90°, 180°, and 270°, which are used to indicate the installation direction of the array calibration device; Mounting surface one (3-1) has flatness accuracy requirements, and mounting surface two (3-2) has flatness and tilt accuracy requirements, in order to ensure the accuracy of the horizontality of the inclined block (3) during the calibration of the whole ship; The roughness of each mounting surface of the inclined block (3) does not exceed 1.6, the flatness is grade 7, and the inclination of mounting surface two (3-2) is grade 7.

5. The embedded conformal array calibration device according to claim 1, characterized in that, The protective plate (4) has the same external dimensions as the first mounting surface (1-1) of the base (1) and is made of polytetrafluoroethylene.

6. The embedded conformal array calibration device according to claim 1, characterized in that, The mirror (5-1) of the reference plane mirror (5) has a mirror diameter of 80mm and a thickness of 9mm. The reflective surface is a vacuum-plated silver external reflective film, and the installation error accuracy is no greater than 1'. The bracket is equipped with a sealed protective cover (5-2). During non-calibration periods, the reference plane mirror (5) is covered with the sealed protective cover (5-2) to protect the mirror surface (5-1). The base of the reference plane mirror (5) has four 30° wide 7-inch waist grooves, which are evenly distributed on the circumference of Φ120. When installing the reference plane mirror (5), use 4 M6 hex head bolts to install and fix it; When calibrating the mechanical shaft of the entire ship, the normal of the protective mirror (5-1) of the reference plane mirror (5) is used to replace the azimuth and elevation of the antenna at the front end of the array to obtain the antenna array pointing parameters.

7. A method for calibrating an embedded conformal array surface, said method being implemented based on the embedded conformal array surface calibration device according to any one of claims 1 to 6, characterized in that, Connect the array calibration device to the array frame via shaft (6) and screws, fix the array equipment on the coordinate measuring machine platform, use the probe on the detector to measure the coordinates of several points on the reference platform, and establish the reference plane; The probe on the detector measures the coordinates of several points on the mounting surface (3-1) of the inclined block (3), constructs a plane, projects the normal of the reference plane and the normal of the mounting surface (3-1) of the inclined block (3) onto the vertical plane, and measures the levelness of the mounting surface (3-1) relative to the reference plane. If the accuracy requirements are not met, the levelness is adjusted by rotating the base (1). Each adjustment is measured with a coordinate measuring machine until the requirements are met. At this time, the positioning pins (7) are installed in the two pin holes on the base (1) to lock the array calibration device, and then the screws are tightened. The probe on the detector measures the coordinates of several points on the reference platform and the mounting surface of the inclined block (3) (3-2), respectively. Planes are constructed, and the normals of the two planes are projected vertically to calculate the inclination of the mounting surface of the inclined block (3-2). If the accuracy requirements are not met, the inclination is adjusted by adjusting the mounting screws. Each adjustment is measured with a coordinate measuring machine until the accuracy requirements are met. The inclination is used to check the levelness of the mounting surface of the inclined block (3) (3-2) relative to the ship's reference plane after it is installed on the ship. The probe on the detector measures the coordinates of several points on the front plane of the array and the mirror surface (5-1) of the reference plane mirror. The planes are constructed respectively, and the normals of the two planes are projected in the horizontal and vertical directions respectively. The error accuracy between the normal of the mirror surface (5-1) of the reference plane mirror and the normal of the front plane of the array in the azimuth and elevation directions is calculated. If the accuracy requirement is not met, the mounting screws of the pad (2) are adjusted, and the measurement and calculation are repeated until the requirement is met. The results are recorded.

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