Device for comprehensively measuring inner diameter and defect size of large-diameter artillery

Abstract

The invention discloses a comprehensive measuring device for the inner diameter and defect size of a large-caliber artillery, which is characterized in that a laser CCD (Charge Coupled Device) diameter measuring testing system and a binocular peeping bore testing system which are carried on a measuring trolley are pushed into a barrel to realize bore testing, so that the measurement of parameters such as the inner diameter, defect depth and area of the barrel of the large-caliber artillery is realized; and data support is provided for the processes of artillery barrel design, research and development, maintenance and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of artillery, and in particular relates to a comprehensive measuring device for the inner diameter and defect size of a large-caliber artillery. Background Art

[0002] Due to physical effects such as high-pressure airflow and high-speed projectile erosion, as well as long-term chemical reactions, the gun barrel suffers varying degrees of wear and damage. Therefore, after a period of shooting, it is necessary to measure the internal parameters of the barrel to evaluate the rationality of the gun barrel matching design and the processing quality of the barrel.

[0003] Currently, the commonly used devices for measuring the inner diameter of large-caliber artillery barrels include grating rulers, eddy current sensors, CCD sensors, etc., which measure by penetrating into the interior of the barrel. However, such devices cannot obtain the inner diameter size on the entire circumference. In addition, the barrel of the artillery barrel is mainly measured by a bore peek trolley equipped with an image sensor. Most of them are currently monocular imaging, mainly used for observation or two-dimensional measurement, and cannot perform three-dimensional measurement of defective parts, and thus cannot obtain parameters such as defect depth. In addition, most current bore test systems can only measure diameter or bore peek, and cannot obtain two types of parameters simultaneously in a single test, resulting in low test efficiency and other problems.

[0004] Therefore, there is a need for an inner bore testing device that can quickly adapt to multiple calibers, measure both diameter and defect detection, and reliably and stably send the inner bore testing system into the barrel, so as to obtain parameters such as the inner diameter, defect area and depth of large-caliber artillery barrels with high precision, providing data support for the design, research and development, processing, after-sales maintenance and other processes of large-caliber artillery barrels. Summary of the Invention

[0005] In order to overcome the shortcomings of the existing technology, the present invention provides a comprehensive measurement device for the inner diameter and defect size of large-caliber artillery. The device realizes inner bore testing by pushing the laser CCD diameter measurement test system and binocular bore peek test system mounted on a measuring carriage into the barrel, thereby solving the measurement of parameters such as the inner diameter, defect depth, and area of ​​large-caliber artillery barrels, and providing data support for the design, development, and maintenance of artillery barrels.

[0006] The technical solutions adopted by the present invention to solve the technical problems are as follows:

[0007] A comprehensive measuring device for the inner diameter and defect size of a large-caliber artillery, comprising a measuring carriage, a binocular sensor, a laser CCD sensor, a laser ranging sensor, a propulsion rod, a rotating plate, and a back-end processor;

[0008] The measuring trolley includes a main shaft, a spring and a three-claw support structure; the three-claw support structure is divided into two groups, front and rear, with each group of three-claw support structures spaced 120 degrees apart and evenly distributed around the main shaft; the spring is sleeved on the main shaft, with one end pressing against the three-claw support structure and the other end blocked by a plug. When the three-claw support structure is compressed and subjected to radial force, the force is converted into a force in the direction of the main shaft through the three-claw support structure. At this time, the spring is compressed, giving the three-claw support structure an outward tension, which plays a centering support role;

[0009] The binocular sensor includes a macro binocular camera and a fill light; the fill light is distributed on both sides of the binocular camera to provide high-quality uniform light for the shooting area;

[0010] The laser CCD sensor is mounted on both ends of a rotating plate, and the laser beam it generates is perpendicular to the main axis. The rotating plate has adjustment holes that can adjust the distance between the laser CCD sensor and the object being measured, i.e., the inner wall of the barrel, to accommodate the inner diameter testing of barrels of different calibers. The rotating plate is mounted on a micro servo motor and driven by a rear-end host computer to achieve full circumferential scanning measurement of the micro laser CCD sensor.

[0011] A laser ranging sensor is installed at the center of the rotating plate; a cover plate is installed at the other end of the barrel to enable the integrated measuring device to measure the position in the bore;

[0012] An electric slip ring is installed in the inner cavity of the micro servo motor, which can connect all the transmission lines of the laser CCD sensor and the laser ranging sensor, and extend them together with the transmission lines of the micro servo motor and the binocular image sensor through the inner cavity of the spindle to the test interface on the end face of the rear spindle.

[0013] Preferably, the push rod is divided into sections, which are connected by threads, and the inner cavity of the push rod can transmit cables; during testing, the cables are passed through the push rods in advance, and the number of push rods is adjusted according to the distance.

[0014] Preferably, the back-end processor consists of a notebook and software. The notebook is installed with comprehensive measurement software, which includes three functions: one is to realize binocular image acquisition and processing, select the area to be tested through the software, and give parameters such as the defect depth and size of the area; the second is to realize laser CCD data acquisition and processing, and can give the ideal circle diameter after fitting; the third is to record the position in the bore of the comprehensive measuring device in real time, and realize the reading of the position in the bore of the comprehensive measuring device.

[0015] Preferably, the top of the three-claw support structure is provided with an arc-shaped roller, the width of which is greater than the width of the rifling. When the integrated measuring device is subjected to axial propulsion force, the arc-shaped roller can rotate smoothly, driving the integrated measuring device to move forward stably.

[0016] Preferably, the binocular sensor is required to have more than 100,000 pixels and be able to receive high-definition images of the barrel wall.

[0017] Preferably, the distance between the binocular sensor and the object to be measured, i.e., the object distance, can be adjusted by tightening the button up and down to adapt to the inner bore testing of barrels of different calibers.

[0018] Preferably, the different calibers are 120 mm and 155 mm.

[0019] Preferably, the laser CCD sensor has a test accuracy of ≤10 microns, and its size and center distance are smaller than the barrel caliber.

[0020] Preferably, the laser ranging sensor has an accuracy of 0.1 mm.

[0021] The beneficial effects of the present invention are as follows:

[0022] The present invention solves the problem of measuring parameters such as the inner diameter, defect depth, and area of ​​large-caliber artillery barrels, and provides data support for the design, development, and maintenance of artillery barrels. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the device for measuring the inner diameter and defect size of a gun;

[0024] Figure 2 This is the structural diagram of the measuring trolley;

[0025] Figure 3 This is a schematic diagram of a miniature binocular sensor;

[0026] Figure 4 This is a schematic diagram of the installation of laser CCD sensor and laser ranging sensor. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the accompanying drawings and examples.

[0028] This invention mainly addresses the problem of lack of effective testing methods for caliber measurement and bore peek of large-caliber artillery. It invents a comprehensive measuring device for the inner diameter and defect size of large-caliber artillery, which solves the measurement of parameters such as the inner diameter, defect depth, and area of ​​large-caliber artillery barrels, and provides data support for the design and development of artillery barrels.

[0029] The integrated measuring device mounted on the measuring trolley is pushed deep into the barrel for measurement via a multi-section push rod. A non-contact micro-laser CCD sensor is arranged in an upper and lower position for scanning measurement, enabling the acquisition of multiple sets of diameter measurement data on the circumference, and ultimately providing the measurement results via the back-end host computer. The micro-binocular image sensor uses binocular imaging and processing to provide the three-dimensional dimensions of the inner wall defect. Furthermore, in order to stably deliver the test system into the barrel and improve test accuracy, the present invention employs front and rear umbrella-shaped support structures to stably clamp the test system on the barrel's central axis. At the same time, for smooth movement, six auxiliary wheels are installed on the front and rear sets of umbrella-shaped support structures to ensure the stable movement of the test system. Secondly, in order to test the inner bores of barrels of different calibers, the distance between the sensor and the object being measured can be fine-tuned structurally. The above invention can solve the problem of simultaneously measuring the barrel's inner diameter and defect size with high precision.

[0030] Example:

[0031] The comprehensive measuring device for the inner diameter and defect size of large-caliber artillery is mainly composed of a measuring trolley, a binocular sensor, a laser CCD sensor, a laser ranging sensor, a propulsion rod, a back-end processor, etc. Figure 1 shown.

[0032] The measuring trolley is mainly composed of a spindle, a spring and a 3-claw support structure, such as Figure 2 As shown. The three-claw support structure is divided into two groups, front and rear, with each group of three-claw support structures spaced 120° apart and evenly distributed around the front and rear spindles. A spring is sleeved on the spindle, with one end resting on the three-claw support structure and the other end blocked by a plug. When the three-claw support wheel is compressed and subjected to radial force, the three-claw support structure converts this force into spindle-direction force. The spring is now compressed, imparting an outward tension to the three-claw support structure, securing the test system to the barrel's central axis and providing centering support. Furthermore, the top of the three-claw support structure is equipped with an arc-shaped roller, the width of which is greater than the width of the rifling. When the integrated measuring device is subjected to axial propulsion, the arc-shaped roller can rotate smoothly, driving the integrated measuring device to move forward stably.

[0033] The binocular sensor consists of a macro binocular camera and a fill light. Figure 3 As shown in the figure, the binocular sensor must have at least 100,000 pixels to capture high-definition images of the barrel wall. Fill lights are located on both sides of the binocular camera, providing high-quality, uniform light for the recording area. The entire test system is mounted between the front and rear three-prong support structures. By tightening the knobs up and down, the distance between the binocular sensor and the object under test—the object distance—can be adjusted to accommodate internal bore testing of different caliber barrels (120mm, 155mm).

[0034] The test accuracy of the laser CCD sensor is ≤10 microns, and its size and center distance are smaller than the barrel diameter. The laser CCD sensor is installed at both ends of the rotating plate. The generated laser beam is perpendicular to the main axis. There are adjustment holes on the rotating plate to adjust the distance between the laser CCD sensor and the object to be measured (the inner wall of the barrel) to adapt to the inner diameter test of barrels of different calibers. The entire rotating plate is installed on a micro servo motor and driven by the rear-end host computer to realize the full circumferential scanning measurement of the micro laser CCD sensor. A laser ranging sensor with an accuracy of 0.1mm is installed in the center of the rotating plate. By adding a cover plate at the other end of the barrel, the position measurement of the integrated measuring device in the bore can be realized. The entire installation is at the front end of the front spindle, such as Figure 4 Because the laser CCD sensor requires rotational testing, an electric slip ring is installed inside the micro servo motor cavity. This allows all transmission lines from the laser CCD sensor and laser ranging sensor to be connected. These lines, along with the transmission lines from the micro servo motor and binocular image sensor, are then extended through the spindle cavity to the test interface on the rear spindle end face.

[0035] The push rod is divided into sections, each connected by a threaded connection. The inner cavity of the push rod can transmit the cable. When testing, the cable is pre-threaded into the push rod. The number of push rods can be adjusted according to the distance.

[0036] The back-end processor is mainly composed of a notebook and software. The notebook is installed with comprehensive measurement software, which has three main functions. The first is to realize binocular image acquisition and processing. The area to be tested is selected through the software, and parameters such as the defect depth and size of the area are given; the second is to realize laser CCD data acquisition and processing, and can give the ideal circle diameter after fitting; the third is to record the position inside the bore of the comprehensive measuring device in real time, and realize the reading of the position inside the bore of the comprehensive measuring device.

Claims

1. A comprehensive measuring device for the inner diameter and defect size of large-caliber artillery, characterized in that: It includes measuring trolley, binocular sensor, laser CCD sensor, laser distance sensor, propulsion rod, rotating plate and back-end processor; The measuring trolley includes a main shaft, a spring and a three-claw support structure; the three-claw support structure is divided into two groups, front and rear, with each group of three-claw support structures spaced 120 degrees apart and evenly distributed around the main shaft; the spring is sleeved on the main shaft, with one end pressing against the three-claw support structure and the other end blocked by a plug. When the three-claw support structure is compressed and subjected to radial force, the force is converted into a force in the direction of the main shaft through the three-claw support structure. At this time, the spring is compressed, giving the three-claw support structure an outward tension, which plays a centering support role; The binocular sensor includes a macro binocular camera and a fill light; the fill light is distributed on both sides of the binocular camera to provide high-quality uniform light for the shooting area; The laser CCD sensor is mounted on both ends of a rotating plate, and the laser beam it generates is perpendicular to the main axis. The rotating plate has adjustment holes that can adjust the distance between the laser CCD sensor and the object being measured, i.e., the inner wall of the barrel, to accommodate the inner diameter testing of barrels of different calibers. The rotating plate is mounted on a micro servo motor and driven by a rear-end host computer to achieve full circumferential scanning measurement of the micro laser CCD sensor. A laser ranging sensor is installed at the center of the rotating plate; a cover plate is installed at the other end of the barrel to enable the integrated measuring device to measure the position in the bore; An electric slip ring is installed in the inner cavity of the micro servo motor, which can connect all the transmission lines of the laser CCD sensor and the laser ranging sensor, and extend them together with the transmission lines of the micro servo motor and the binocular image sensor through the inner cavity of the spindle to the test interface on the end face of the rear spindle.

2. A comprehensive measuring device for the inner diameter and defect size of large-caliber artillery according to claim 1, characterized in that: The push rod is divided into sections, which are connected by threads. The inner cavity of the push rod can transmit cables. During testing, the cables are passed through the push rod in advance, and the number of push rods is adjusted according to the distance.

3. A comprehensive measuring device for the inner diameter and defect size of large-caliber artillery according to claim 1, characterized in that: The back-end processor consists of a notebook and software. The notebook is installed with comprehensive measurement software, which includes three functions: one is to realize binocular image acquisition and processing, select the area to be tested through the software, and give parameters such as the defect depth and size of the area; the second is to realize laser CCD data acquisition and processing, and can give the ideal circle diameter after fitting; the third is to record the position in the bore of the comprehensive measuring device in real time, and realize the reading of the position in the bore of the comprehensive measuring device.

4. A comprehensive measuring device for the inner diameter and defect size of large-caliber artillery according to claim 1, characterized in that: The top of the three-claw support structure is provided with an arc-shaped roller, the width of which is greater than the width of the rifling. When the integrated measuring device is subjected to axial propulsion force, the arc-shaped roller can rotate smoothly, driving the integrated measuring device to move forward stably.

5. The device for comprehensive measurement of inner diameter and defect size of large-caliber artillery according to claim 1, characterized in that: The binocular sensor is required to have more than 100,000 pixels and be able to receive high-definition images of the barrel wall.

6. A comprehensive measuring device for the inner diameter and defect size of a large-caliber artillery according to claim 1, characterized in that: The distance between the binocular sensor and the object to be measured, i.e., the object distance, can be adjusted by tightening the button up and down to adapt to the inner bore testing of barrels of different calibers.

7. A comprehensive measuring device for the inner diameter and defect size of large-caliber artillery according to claim 6, characterized in that: The different calibers are 120mm and 155mm.

8. The device for comprehensive measurement of inner diameter and defect size of large-caliber artillery according to claim 1, characterized in that: The laser CCD sensor has a test accuracy of ≤10 microns, and its size and center distance are smaller than the barrel caliber.

9. A comprehensive measuring device for the inner diameter and defect size of a large-caliber artillery according to claim 1, characterized in that: The laser distance sensor has an accuracy of 0.1 mm.

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