A device and method for detecting the spatial dimensions of a finished rocket with a canopy.

Abstract

A device and method for detecting the spatial dimensions of a finished product, including a rocket with a canopy, solves the problems of low efficiency and poor stability in detecting spatial dimensions. The detection device includes a support mechanism, a positioning fixture, a clamping mechanism, a sensor measurement mechanism, an air inlet valve, and an interactive system. The support mechanism provides a horizontal mounting surface through its own equipment plate to support the positioning fixture, clamping mechanism, and sensor measurement mechanism. The positioning fixture is installed on the equipment plate to ensure the initial positioning accuracy of the product under test and the installation accuracy of the displacement sensor. The clamping mechanism is installed on the left side of the equipment plate and performs secondary positioning of the left side of the rocket tube body of the product through radial and axial pressure during the measurement process. The sensor measurement module is kept perpendicular to each measurement plane through the positioning fixture to realize the measurement of spatial displacement changes of each measurement element. Compressed air is supplied to the sensor measurement mechanism through the air inlet valve. The interactive system serves as the operating system and is used to realize human-computer interaction.

Description

Technical Field

[0001] This invention relates to a device and method for detecting the spatial dimensions of a finished rocket with a canopy, and is particularly suitable for detecting the dimensions of the three-dimensional spatial angle between two planes of the rocket structure, the intersection of the axes, and the distance between the end face. Background Technology

[0002] The ejection rocket consists of two independent rocket bodies, which are connected and fixed to a base at an 80° angle. See the structural diagram below. Figure 1 The jettison rocket mainly consists of a triangular base assembly 1, a left cylindrical shell assembly 2, a right cylindrical shell assembly 3, a left nozzle support assembly 4, and a right nozzle support assembly 5. After assembly, it is necessary to measure the spatial angle between the left support 401 and the right support 501, the angle between the axes of the left cylindrical shell assembly 2 and the right cylindrical shell assembly 3, the distance between the intersection of the axes of the left cylindrical shell assembly 2 and the right cylindrical shell assembly 3 and the end face of the left support 401, and the distance between the intersection of the axes of the left cylindrical shell assembly 2 and the right cylindrical shell assembly 3 and the end face of the right support 501.

[0003] Currently, domestic measurements of spatial angles, distances, and other dimensions mainly rely on standard coordinate measuring machines (CMMs). After calibration, coordinate systems are established and dimensions are evaluated using coordinate point fitting calculations. This method takes approximately 3 minutes or more per measurement, resulting in low inspection efficiency. Furthermore, the finished rocket containing propellant charges poses a safety hazard when inspected using non-explosion-proof equipment. Additionally, the bottom reference points of the rocket are not on the same horizontal plane, requiring the design and manufacture of specialized positioning fixtures for CMM inspection, increasing the difficulty of equipment testing. Summary of the Invention

[0004] The technical problem to be solved by this invention is to overcome the shortcomings of the prior art and solve the problems of low efficiency and poor stability in detecting the spatial dimensions of the rocket with the canopy thrown.

[0005] The objective of this invention is achieved through the following technical solutions:

[0006] A spatial dimension detection device for a finished rocket launcher includes a support mechanism, a positioning fixture, a clamping mechanism, a sensor measurement mechanism, and a touch screen all-in-one machine. The support mechanism consists of a metal steel frame and a large equipment plate, which is kept horizontal to support the positioning fixture, clamping mechanism, and sensor measurement mechanism. The positioning fixture is installed on the large equipment plate to ensure the initial positioning accuracy of the product and the installation accuracy of the displacement sensor. The clamping mechanism is installed on the left side of the large equipment plate and performs secondary positioning of the left side of the rocket tube body of the product through radial and axial pressure during the measurement process. The sensor measurement module is kept perpendicular to each measurement plane through the positioning fixture to realize the measurement of spatial displacement changes of each measurement element. The touch screen all-in-one machine is installed on the side of the support mechanism for system operation and human-computer interaction.

[0007] The positioning fixture includes a top limiting fixture, a left-axis V-shaped positioning fixture, a right-axis trapezoidal positioning fixture, and a slot-type positioning fixture. The top limiting fixture is horizontally fixed above the large plate of the equipment and flush with the top of the product's triangular base, used for vertical positioning of the product. The left-axis V-shaped positioning fixture and the right-axis trapezoidal positioning fixture form an 80° angle between their axes, supporting the rocket tube bodies on both sides of the product. The slot-type positioning fixture has displacement sensor mounting holes set at 90° intervals in the left, lower, and right directions, which are embedded in the left-axis V-shaped positioning fixture and the right-axis trapezoidal positioning fixture, used for measuring the cylindrical surfaces of the rocket tube bodies on the left and right sides of the product.

[0008] The clamping mechanism includes a radial clamping mechanism and an axial clamping mechanism. The radial clamping mechanism consists of a telescopic rod and a radial clamping rod. The telescopic rod is vertically installed on the equipment plate, and the radial clamping rod is horizontally installed above the telescopic rod. A non-metallic washer is installed at the head of the radial clamping rod. The radial secondary positioning of the left cylindrical shell assembly of the product is achieved by controlling the telescopic rod and the radial clamping rod through a servo motor. The axial clamping mechanism is horizontally installed on the left side of the equipment plate. The secondary positioning of the axis of the left cylindrical shell assembly of the product is completed by pneumatically telescopic non-metallic clamping rod, thereby improving the product positioning repeatability and measurement accuracy.

[0009] The sensor measurement mechanism consists of seven measurement modules: a triangular base measurement module, a left-axis cylinder measurement module, a right-axis cylinder measurement module, a left support ear measurement module, a right support ear measurement module, a left support ear end face measurement module, and a right support ear end face measurement module. Each of the triangular base, left support ear, and right support ear measurement modules comprises three displacement sensors arranged in a triangular configuration for planar element measurement. Each of the left-axis and right-axis cylinder measurement modules comprises six displacement sensors arranged in two parallel circles radially on the cylinder for cylindrical element measurement. Each of the left and right support ear end face measurement modules is equipped with one displacement sensor installed perpendicular to the end face for end face displacement detection.

[0010] The displacement sensor is a 10mm cylinder-type pen sensor with a repeatability of ≤2μm.

[0011] During measurement, the product is placed on the left-axis V-shaped positioning fixture and the right-axis trapezoidal positioning fixture, keeping it horizontal; the radial clamping mechanism extends upward by 4cm, rotates counterclockwise 90° to above the left cylindrical shell assembly of the product, and retracts the telescopic rod downward to clamp the product; after the axial clamping mechanism is vented, a non-metallic clamping rod extends to apply axial pressure to the left cylindrical shell assembly of the product; all measuring modules are vented with 0.5MPa air pressure, and the displacement sensor touches the product surface. The product's spatial dimensions are quickly measured through a sample comparison detection method.

[0012] The measurement method for the sample comparison is based on the measured values ​​of the measured samples. It measures the corresponding dimensions of the product under test by measuring the changes in these changes. This includes: the distance L1 between the intersection of the axes of the left and right cylindrical shell assemblies of the sample and the end face of the left support; the measured distance L2 between the intersection of the axes of the left and right cylindrical shell assemblies of the sample and the end face of the right support; the measured angle r3 between the axes of the left and right cylindrical shell assemblies of the sample; the change in angle of the left cylindrical shell assembly axis Δr1; the change in angle of the right cylindrical shell assembly axis Δr2; the change in displacement sensor value of the left support end face ΔL1; and the distance L between the intersection of the axes of the left and right cylindrical shell assemblies of the product under test and the end face of the left support. ′ 1, The displacement sensor change at the right support end face is ΔL2, and the distance between the intersection of the axes of the left and right cylindrical housing assemblies of the tested product and the right support end face is L. ′ 2, The spatial angle between the left and right supports of the sample is A. The change in the normal vector angle (Line1) after the left support measurement module touches the plane of the left support, and the change in the normal vector angle (Line2) after the right support measurement module touches the plane of the right support, are calculated. The change in the normal vector angle between the left and right supports is ΔA = Line1 × Line2. The spatial angle between the left and right supports of the tested product is A. ′ =A + ΔA.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] (1) Combining the product structure characteristics, the present invention adopts a left-axis V-shaped positioning fixture and a right-axis trapezoidal positioning fixture to achieve dual-axis height positioning. The product is further positioned in the vertical direction and axial direction by a radial clamping mechanism and an axial clamping mechanism. The positioning accuracy is high, the repeatability is good, the distance repeatability accuracy is ≤3μm, and the angle repeatability accuracy is ≤1′.

[0015] (2) The present invention uses multiple sets of pneumatic displacement sensors to measure the displacement changes of the cylindrical shell assembly, triangular base assembly and nozzle lug of the ejector rocket, thereby reducing the mechanical action and the action time of the touch process is less than 10 seconds.

[0016] (3) The present invention reduces the size detection time of the rocket by 1 minute per launch, which is 60% more efficient than manual measurement of 3 minutes per launch;

[0017] (4) This invention enables automated detection of drug-containing products, reducing the safety risks to testing personnel;

[0018] (5) For the double cylindrical deflection lug structure of the cover-throwing rocket, the present invention designs positioning fixtures and clamping mechanisms to achieve rapid and accurate positioning of the product and detect changes in the spatial angle of the two lugs, the axial angle of the two cylinders, and the distance between the lug end faces. The present invention uses sample comparison detection technology to achieve automatic detection of spatial dimensions, thereby solving the problems of low efficiency and poor stability in spatial dimension detection of the cover-throwing rocket. Attached Figure Description

[0019] Figure 1 A simplified structural diagram of a rocket with a ballast jettison.

[0020] Figure 2 This is a simplified diagram of the mechanism of the present invention;

[0021] Figure 3 This is a side view of the invention in its non-operating state;

[0022] Figure 4 This is a side view of the ventilation touch test state of the present invention;

[0023] Figure 5 This is a simplified diagram of the clamping mechanism and pneumatic clamping mechanism of the present invention;

[0024] Figure 6 This is a simplified diagram of the two-axis positioning fixture of the present invention;

[0025] Figure 7 This is a simplified diagram of the top positioning fixture of the present invention;

[0026] Figure 8 This is a schematic diagram of the sensor layout of the present invention;

[0027] Figure 9 This is a schematic diagram illustrating the spatial dimension calculation of the present invention. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0029] A device and method for detecting the spatial dimensions of a finished rocket with a canopy, wherein the detection device is as follows: Figure 2 , 3 As shown in Figure 4, it includes a support mechanism, a positioning fixture, a clamping mechanism, a sensor measuring mechanism, a touch screen all-in-one machine, and an air intake valve 19.

[0030] The support mechanism is vertically constructed from a metal steel frame and a large equipment plate 18, which remains horizontal and is used to support the positioning fixtures, clamping mechanism, and sensor measurement mechanism.

[0031] The positioning fixtures include a top limiting fixture 6, a left-axis V-shaped positioning fixture 7, a right-axis trapezoidal positioning fixture 8, and a slot-type positioning fixture, which are used to ensure the initial positioning accuracy of the product and the installation accuracy of the displacement sensor. The slot-type positioning fixture has displacement sensor mounting holes set at 90° intervals in the left, lower, and right directions, and is embedded in the left-axis V-shaped positioning fixture and the right-axis trapezoidal positioning fixture, for measuring the cylindrical surfaces of the rocket tube body on the left and right sides of the product.

[0032] The clamping mechanism includes a radial clamping mechanism 9 and an axial clamping mechanism 10, which are installed on the left side of the equipment plate 18 and are used for secondary positioning of the product.

[0033] The sensor measurement mechanism includes seven measurement modules: a triangular base measurement module 11, a left-axis cylindrical measurement module 12, a right-axis cylindrical measurement module 13, a left support ear measurement module 14, a right support ear measurement module 15, a left support ear end face measurement module 16, and a right support ear end face measurement module 17. These modules are used to measure the position of various inspection elements of the product.

[0034] The touchscreen all-in-one machine is installed on the side of the support structure and is used for system operation and human-computer interaction.

[0035] like Figure 2 , Figure 5 As shown, the radial clamping mechanism 9 includes a telescopic rod 902 and a radial clamping rod 901 connected to the telescopic rod 902. The telescopic rod 902 can extend and retract 4cm in the vertical direction via a servo motor. A non-metallic washer is installed at the head of the radial clamping rod for radially clamping the product. The axial clamping mechanism 10 includes a non-metallic clamping rod 1001 and a clamping base 1002. The clamping base 1002 is vertically installed on the equipment plate 18, and the non-metallic clamping rod 1001 is horizontally installed inside the clamping base 1002.

[0036] like Figure 2 , Figure 6 , Figure 7 As shown, the top limiting fixture 6 is connected to the triangular base measuring module 11. The left-axis cylindrical measuring module 12 is embedded in the left-axis V-shaped positioning fixture 7, and the right-axis cylindrical measuring module 13 is embedded in the right-axis trapezoidal positioning fixture 8. The radial clamping mechanism 9 is parallel to the left-axis cylindrical measuring module 12 and is installed on the equipment plate 18 through the base. The axial clamping mechanism 10 is coaxial with the left-axis cylindrical measuring module 12. The right-axis trapezoidal positioning fixture 8 and the left-axis V-shaped positioning fixture 7 are symmetrically installed on the equipment plate 18, with their center lines forming an angle of 80°. They are used to support the right cylindrical shell assembly 3 and the left cylindrical shell assembly 2, thereby limiting the product axis. The top limiting fixture 6 is provided with a top limiting block 601, which is installed directly above the equipment plate 18 to limit the triangular base assembly 1 of the product in the front-back direction.

[0037] like Figure 8As shown, the triangular base measuring module 11 includes pneumatic displacement sensors 1101, 1102, and 1103, which are installed in a triangle shape within the measuring module for horizontal contact measurement of the triangular base assembly 1. The left-axis cylindrical measuring module 12 includes pneumatic displacement sensors 1201, 1202, 1203, 1204, 1205, and 1206. These six displacement sensors are installed in two layers, front and back, in the left, lower, and right directions of the module. The horizontal distance between the plane where displacement sensor 1203 is located and the planes where pneumatic displacement sensors 1204, 1205, and 1206 are located is 147mm, used for contact detection of the left cylindrical housing assembly 2; the right-axis cylindrical measuring module 13 includes pneumatic displacement sensors 1301, 1302, 1303, 1304, 1305, and 1306. These six displacement sensors are installed in two layers, front and back, on the left, bottom, and right sides of the module. The horizontal distance between the plane containing pneumatic displacement sensors 1304, 1305, and 1306 is 147mm, used for contact detection of the right cylindrical housing assembly 3; the left support ear measuring module 14 includes pneumatic displacement sensors 1401, 1402, and 1403, installed in a right-angled triangle within the measuring module, used for contact detection of the right plane of the left support ear 401, a sub-part of the left nozzle support ear assembly 4; the right support ear measuring module 15 includes pneumatic displacement sensors 1501, 1502, and 1503, installed in a right-angled triangle within the measuring module. Within the measurement module, a pneumatic displacement sensor 1601 is used to measure the left plane of the right support ear 501, a sub-part of the right nozzle support ear assembly 5; the left support ear end face measurement module 16 is equipped with a pneumatic displacement sensor 1601, the center line of which is parallel to the center line of the left shaft cylindrical measurement module 12, and is used to measure the end face of the left support ear 401, a sub-part of the left nozzle support ear assembly 4; the right support ear end face measurement module 17 is equipped with a pneumatic displacement sensor 1701, the center line of which is parallel to the center line of the right shaft cylindrical measurement module 13, and is used to measure the end face of the left support ear 501, a sub-part of the right nozzle support ear assembly 5; the stability of the relative positions of the 23 pneumatic displacement sensors ensures the direction, position, and accuracy of the measurement elements.

[0038] like Figure 3 , Figure 4As shown, during measurement, the product sample is placed horizontally on the left-axis V-shaped positioning fixture 7 and the right-axis trapezoidal positioning fixture 8, keeping it horizontal, with the top of the product's triangular base tightly against the top limiting block 601; the radial clamping mechanism 9 extends upward by 4cm, rotates counterclockwise 90° to above the left cylindrical housing assembly 2, and retracts the telescopic rod downward by 4cm to clamp the left cylindrical housing assembly 2; after the axial clamping mechanism is vented, the non-metallic clamping rod 1001 extends to apply axial pressure to the product; 0.5MPa compressed air is introduced through the air inlet valve 19 to the triangular base measuring module 11 and the left-axis cylindrical measuring module 12. The following components are included: right-axis cylindrical measuring module 13, left-side lug measuring module 14, right-side lug measuring module 15, left-side lug end face measuring module 16, and right-side lug end face measuring module 17; pneumatic displacement sensors 1101, 1102, and 1103 abut against the lower plane of the triangular base assembly 1; pneumatic displacement sensors 1201, 1202, 1203, 1204, 1205, and 1206 abut against the radial surface of the left cylindrical housing assembly 2. Pneumatic displacement sensors 1301, 1302, 1303, 1304, 1305, and 1306 abut against the radial surface of the right cylindrical housing assembly 3; pneumatic displacement sensors 1401, 1402, and 1403 abut against the right plane of the left support lug 401; displacement sensors 1501, 1502, and 1503 abut against the left plane of the right support lug 501; and pneumatic displacement sensor 1601 abuts against the left support lug 401. At the end face, the pneumatic displacement sensor 1701 touches the end face of the left support lug 501; then, input the measured values ​​of the spatial angle between the left and right support lugs, the measured values ​​of the angle between the axes of the left and right cylindrical shell assemblies, the measured values ​​of the distance between the intersection of the axes of the left and right cylindrical shell assemblies and the end face of the left support lug, and the measured values ​​of the distance between the intersection of the axes of the left and right cylindrical shell assemblies and the end face of the right support lug, to complete the calibration of the detection device; then remove the sample of the product to be tested, place the product to be tested on the left-axis V-shaped positioning fixture 7 and the right-axis trapezoidal positioning fixture 8, and measure again according to the above process.

[0039] During dimensional calculation and evaluation, the coordinate points detected by pneumatic displacement sensors 1101, 1102, and 1103 serve as the basic horizontal plane of the coordinate system; the coordinate points detected by pneumatic displacement sensors 1201, 1202, 1203, 1204, 1205, and 1206 form two concentric circles, constructing the left-side cylinder; the coordinate points detected by pneumatic displacement sensors 1301, 1302, 1303, 1304, 1305, and 1206 form the left-side cylinder. The coordinate points detected by the displacement sensor 1306 form two concentric circles, constructing the right cylinder; the coordinate points detected by the pneumatic displacement sensors 1401, 1402, and 1403 form the left measured deflection surface; the coordinate points detected by the pneumatic displacement sensors 1501, 1502, and 1503 form the right measured deflection surface; the coordinate point detected by the pneumatic displacement sensor 1601 serves as the axial displacement point of the left support 401 along the left cylindrical housing assembly 2; the coordinate point detected by the pneumatic displacement sensor 1701 serves as the axial displacement point of the right support 501 along the right cylindrical housing assembly 3.

[0040] like Figure 8 , Figure 9 As shown, during the calculation, the distance between the intersection of the axes of the left and right cylindrical shell assemblies of the sample and the end face of the left support is L1; the distance between the intersection of the axes of the left and right cylindrical shell assemblies of the sample and the end face of the right support is L2; ​​and the angle between the axes of the left and right cylindrical shell assemblies of the sample is r3. Pneumatic displacement sensors 1201, 1202, 1203, 1204, 1205, and [other pneumatic displacement sensors] are also included. The angle change of the cylinder axis formed by the coordinate points detected by pneumatic displacement sensors 1206 is Δr1. The angle change of the cylinder axis formed by the coordinate points detected by pneumatic displacement sensors 1301, 1302, 1303, 1304, 1305, and 1306 is Δr2. The change in pneumatic displacement sensor 1601 is ΔL1. The distance between the intersection of the axes of the left and right cylindrical housing assemblies of the tested product and the end face of the left support is L. ′ 1, The change in pneumatic displacement sensor 1701 is ΔL2, and the distance between the intersection of the axes of the left and right cylindrical housing assemblies of the measured product and the end face of the right support is L. ′ 2, The spatial angle between the left and right supports of the sample is A. The change in the normal vector angle of the coordinate point detected by pneumatic displacement sensors 1401, 1402, and 1403 is Line1. The change in the normal vector angle of the coordinate point detected by pneumatic displacement sensors 1501, 1502, and 1503 is Line2. The change in the normal vector of the spatial angle between the left and right supports is ΔA = Line1 × Line2. The spatial angle between the left and right supports of the tested product is A. ′ =A + ΔA.

[0041] according to Figures 1-6 The aforementioned mechanism and connection structure constitute the spatial dimension detection device for the finished product of the rocket with a canopy. It uses a left-axis V-shaped positioning fixture and a right-axis trapezoidal positioning fixture to achieve dual-axis height positioning. The vertical and axial directions of the product are further positioned by a clamping mechanism and a pneumatic clamping mechanism. The positioning accuracy is high, the repeatability measurement stability is good, the distance repeatability accuracy is ≤3μm, and the angle repeatability accuracy is ≤1′. Multiple sets of pneumatic displacement sensors are used to measure simultaneously, reducing the movement of the mechanism. The action time of the touch test process is less than 10 seconds. Finally, the size detection time of the rocket with a canopy is 1 minute / launch, which is 60% more efficient than the 3 minutes / launch of manual measurement. Each pneumatic displacement sensor extends its probe through air pressure control to measure the distance of the product detection elements. The protective cover is installed on the equipment plate to achieve explosion-proof and human-machine isolation functions, reducing the safety risks of the inspection personnel.

[0042] This invention uses a left-axis V-shaped positioning fixture 7 to fix the left cylindrical shell assembly 2, and a right-axis trapezoidal positioning fixture 8 to fix the right cylindrical shell assembly 3. A top limiting block controls the horizontal and vertical positioning of the triangular base assembly 1. A radial clamping mechanism 9 presses the left cylindrical shell assembly 2 downwards in the vertical direction, and an axial clamping mechanism 10 clamps it along the axis of the left cylindrical shell assembly 2, achieving rapid and accurate positioning of various parts of the product. The invention utilizes a triangular base measuring module 11, a left-axis cylindrical measuring module 12, a right-axis cylindrical measuring module 13, a left support ear measuring module 14, a right support ear measuring module 15, a left support ear end face measuring module 16, and a right support ear end face measuring module 17 installed on various inspection elements of the product to detect the actual dimensions and distances of the rocket. The actual size changes of the product are calculated based on the directional and positional relationships of the sensor measurement points. The actual product size is converted using the measured values ​​and changes from the measured sample, resulting in the final size measurement, thus improving the efficiency and stability of the measurement.

[0043] The contents not described in detail in this specification are common knowledge to those skilled in the art.

[0044] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

Claims

1. A device for detecting the spatial dimensions of a finished rocket with a canopy, characterized in that, Includes support mechanism, positioning fixture, clamping mechanism, sensor measuring mechanism, air intake valve, and interaction system; The support mechanism provides a horizontal mounting surface via its own large equipment plate to support the positioning fixture, clamping mechanism, and sensor measurement mechanism. The positioning fixture is mounted on the large equipment plate to ensure the initial positioning accuracy of the product under test and the installation accuracy of the displacement sensor. The clamping mechanism is mounted on the left side of the large equipment plate and performs secondary positioning of the left side rocket tube body of the product through radial and axial pressure during the measurement process. The sensor measurement module is kept perpendicular to each measurement plane through the positioning fixture to realize the measurement of spatial displacement changes of each measurement element. Compressed air is supplied to the sensor measurement mechanism through the air inlet valve. The interactive system serves as the operating system and is used to realize human-computer interaction. The positioning fixture includes a top limiting fixture, a left-axis V-shaped positioning fixture, a right-axis trapezoidal positioning fixture, and a slot-type positioning fixture. The top limiting fixture is horizontally fixed above the large plate of the equipment and is flush with the top of the triangular base of the product being tested, used for vertical positioning of the product. The angle between the axes of the left-axis V-shaped positioning fixture and the right-axis trapezoidal positioning fixture is a first preset value, supporting the rocket tube bodies on both sides of the product being tested. The slot-type positioning fixture has displacement sensor mounting holes set at preset angles in the left, lower, and right directions, which are embedded in the left-axis V-shaped positioning fixture and the right-axis trapezoidal positioning fixture, used for measuring the cylindrical surfaces of the rocket tube bodies on the left and right sides of the product being tested. The sensor measurement mechanism includes a triangular base measurement module, a left-axis cylinder measurement module, a right-axis cylinder measurement module, a left-support ear measurement module, a right-support ear measurement module, a left-support ear end face measurement module, and a right-support ear end face measurement module. Each of the triangular base, left-support ear, and right-support ear measurement modules consists of three displacement sensors arranged in a triangular configuration for planar feature measurement. Each of the left-axis and right-axis cylinder measurement modules consists of six displacement sensors arranged in two parallel circles radially on the cylinder for cylindrical feature measurement. Each of the left-support ear end face measurement modules is installed with one displacement sensor perpendicular to the end face for end face displacement detection.

2. The spatial dimension detection device for the finished product of the rocket with a canopy as described in claim 1, characterized in that, The clamping mechanism includes a radial clamping mechanism and an axial clamping mechanism. The radial clamping mechanism includes a telescopic rod and a radial clamping rod. The telescopic rod is vertically installed on the equipment plate, and the radial clamping rod is horizontally installed above the telescopic rod. A non-metallic washer is installed at the head of the radial clamping rod. The radial secondary positioning of the left cylindrical shell assembly of the product is achieved by controlling the telescopic rod and the radial clamping rod through a servo motor. The axial clamping mechanism is horizontally installed on the left side of the equipment plate. The secondary positioning of the axis of the left cylindrical shell assembly of the product is completed by pneumatically telescopic non-metallic clamping rod, thereby improving the product positioning repeatability and measurement accuracy.

3. The spatial dimension detection device for the finished product of the rocket with its canopy thrown according to claim 1, characterized in that, The displacement sensor is a pen-type sensor with a repeatability accuracy of ≤2µm.

4. A detection method based on the spatial dimension detection device for the finished product of a rocket with a canopy as described in claim 1, characterized in that, include: The product to be tested is placed on the left-axis V-shaped positioning fixture and the right-axis trapezoidal positioning fixture, and kept horizontal. The radial clamping mechanism extends upward and rotates counterclockwise to the left cylindrical shell assembly of the product to be tested, and then retracts the telescopic rod downward to clamp the product. After the axial clamping mechanism is ventilated, it extends a non-metallic clamping rod to apply axial pressure to the left cylindrical shell assembly of the product. All measuring modules of the sensor measuring mechanism are supplied with air, and the displacement sensor touches the surface of the product to be tested. The product's spatial dimensions are quickly measured through a sample comparison detection method.

5. The detection method according to claim 4, characterized in that, The measurement method for sample comparison refers to measuring the corresponding dimensions of the product under test by measuring the changes in the measured values ​​of the measured samples.

6. The detection method according to claim 5, characterized in that, The measurement method for sample comparison includes: the distance between the intersection of the axes of the left and right cylindrical shell assemblies of the sample and the end face of the left support lug is... The measured distance between the intersection of the axes of the left and right cylindrical shell assemblies of the sample and the end face of the right support is [value missing]. The measured value of the included angle between the axes of the left and right cylindrical shell assemblies of the sample is... The change in the axial angle of the left cylindrical shell assembly is The change in the axial angle of the right cylindrical shell assembly is The change in displacement of the left axle end face sensor is ; The distance between the intersection of the axes of the left and right cylindrical housing assemblies of the tested product and the end face of the left support lug is... , - The change in displacement of the right axle end face sensor is: The distance between the intersection of the axes of the left and right cylindrical housing assemblies of the tested product and the end face of the right support lug is... , - The spatial angle between the left and right supports of the sample is A. The change in the normal vector angle after the left support measurement module touches the plane of the left support (Line 1) and the change in the normal vector angle after the right support measurement module touches the plane of the right support (Line 2) are also shown. The change in the normal vector of the spatial angle between the left and right supports is also described. Line 1 × Line 2, the spatial angle between the left and right support ears of the tested product. =A+ .

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