A comprehensive detection device and method for physical quantities of a correction cabin

Abstract

The present invention discloses a comprehensive detection device for physical quantities of a correction cabin, including: a detection platform, a pressure measurement component, a photoelectric measurement component, a servo motor, and an external encoder; a front support wheel with adjustable height and two groups of rear support wheels of different sizes are arranged on the detection platform, and four support wheels support the horizontal placement of the product to be tested; a servo motor drives a rear support wheel to rotate it, thereby driving the entire product to be tested to rotate, and an external encoder is installed on another rear support wheel as a signal point for the servo motor to stop rotating; the photoelectric measurement component is a total of six photoelectric distance measuring sensors arranged at the head and bottom of the rear support wheel, which are used to measure the spatial position and length of the product to be tested in the axial direction; the pressure measurement component is four pressure sensors arranged at the front and rear ends of the detection platform, which read sensor data and calculate the mass value of the product to be tested according to its different installation positions. The present invention has high efficiency, high precision and is easy to implement.

Description

Technical Field

[0001] The invention belongs to the field of detection technology and relates to a comprehensive detection device and a detection method for physical quantities of a correction cabin. Background Art

[0002] The physical quantity measurement of ammunition is an important part of conventional weapons testing at the shooting range. It provides geometric raw data for various ammunition experiments and provides a basis for evaluating the reliability of products. High-precision assembly can improve the accuracy of the physical quantity parameters of the projectile, thereby reducing the difficulty of controlling the projectile during flight, and is an important guarantee for improving the success rate and hit rate of flight tests. As an important part of projectile detection, physical quantity measurement mainly includes length, swing difference, weight, center of mass, maximum outer diameter and other items. However, traditional measurement methods are mainly operated manually, and their equipment has problems such as low degree of automation, low measurement accuracy, low measurement efficiency, and special machine use, which cannot adapt to the rhythm of modern mass production.

[0003] With the development of various industries, detection technology has been widely used in different fields and its development focus has been towards non-contact, high-precision and high-speed. Non-contact measurement is a method that does not touch the surface to be measured. It has the advantages of high speed and no scratches on the measured object. In recent years, due to the rapid development of non-contact measurement methods, more and more non-contact measurement methods have been applied in the measurement field. For example, triangulation, laser ranging, image scanning, etc.

[0004] At present, there are several main problems with traditional measurement equipment and methods: dedicated machines, contact measurement, paper-based data recording, and scattered and time-consuming measurement projects. Summary of the invention

[0005] (I) Purpose of the invention

[0006] The purpose of the present invention is: to address the problems of traditional measurement, to propose a comprehensive detection device and method for physical quantities of a correction cabin, to abandon the traditional vertical measurement structure of the product on the equipment, and to adopt a horizontal structural design, to use high-precision, non-contact sensors to avoid surface damage to the product during measurement, and to set multiple product placement points to achieve the use of multiple products; in terms of measurement methods, based on structural design and the measurement principle of physical quantities, a new physical quantity measurement algorithm is proposed; and the measurement functions of items such as length, runout, mass, center of mass, and maximum outer diameter are integrated using a simple structure and measurement values.

[0007] (II) Technical solution

[0008] In order to solve the above technical problems, the present invention provides a correction cabin physical quantity comprehensive detection equipment and detection method, including: detection platform, pressure measurement component, photoelectric measurement component, industrial computer, servo motor, motor driver, encoder. Since the device takes into account the size differences of different products to be tested, the front support wheel can adjust the height in a small range in the structural design, and the rear support wheel is designed into two groups of large and small to adapt to the products to be tested with different outer diameters. The four support wheels support the products to be tested to be placed horizontally, and the bearing is used as an axial limiter to fix the products to be tested to avoid axial displacement but not limit their rotation. The servo motor drives the rear right support wheel to rotate, thereby driving the rotation of the entire product to be tested, because it is necessary to ensure that the product to be tested rotates one circle during the calculation process of the swing difference and the maximum outer diameter. Therefore, in order to prevent the error caused by the relative slip between the product to be tested and the rear active support wheel, the rear left support wheel is installed with an external encoder as a signal point for the motor to stop rotating. The distance sensor is designed in the corresponding position according to the different structures of the function, but in order to adapt to different models of products to be tested, it is not absolutely fixed in the design, and can be moved in a small range perpendicular to the measurement calculation plane. The support wheels are made of 66+GF30 material, which has the characteristics of small deformation, stable size, strong wear resistance and will not scratch the surface of the product to be tested. The front support roller adopts a conical surface design to achieve position correction of the cabin during rotation.

[0009] The workflow of a comprehensive detection method for physical quantities of a correction cabin of the present invention is as follows: first, place the product to be tested on the detection equipment, and use two high-precision photoelectric distance sensors at the front and rear to measure the spatial position and length of the product to be tested in the axial direction. At the same time, four pressure sensors collect data to calculate the mass value of the product to be tested. The center of mass calculation formula is used to calculate the center of mass of the product to be tested in the axial direction based on the measured mass and length. The product to be tested is then rotated, and during the entire rotation process, the minimum value of the distance sensor at the maximum outer diameter measured at the rear end is read to obtain the maximum outer diameter of the product to be tested. At the same time, the distance between the product to be tested and the six sensors can be obtained through six photoelectric distance sensors, the spatial position of the product to be tested can be determined, and the radial runout during the entire rotation process can be calculated as the swing error.

[0010] The present invention provides a method for measuring the physical quantity parameters of the correction chamber of the product to be tested. For the measurement method of the swing difference and the maximum outer diameter, the traditional vertical measurement is abandoned and the horizontal rotation measurement is adopted. There are three photoelectric sensors at the head and the bottom respectively. One of the sensors is designed at the bottom to measure the laser beam vertically upward, and the other two sensors are in a horizontal position to shoot oppositely. The opposite laser and the diameter of the product to be tested on the slice circle coincide. Fig.11 For the measurement of the maximum outer diameter, the product to be tested rotates 360° and the sensor collects readings every 2°. The diameter of the circle is calculated theoretically.

[0011] d=L-l2-l4 (1)

[0012] d: The theoretical value of the diameter of the circle of the product to be tested;

[0013] L: The installation distance between two opposing photoelectric sensors;

[0014] l2: The reading of the object surface measured by the photoelectric sensor at the left end;

[0015] l4: The reading of the object surface measured by the photoelectric sensor at the right end;

[0016] In the actual rotation process, the reading of the bottom sensor will have a distance difference of △, indicating that the slice circle has a small radial displacement, which will cause the incident laser and the diameter to deviate from each other, resulting in the reading of the incident laser being substituted into formula 1. The result is not equal to the diameter but the chord length. Therefore, we need to calculate the compensation amount x. △ produces an angle θ, so the compensation amount

[0017] x=△*tanθ (2)

[0018] x: diameter compensation caused by radial displacement;

[0019] △: The distance difference generated by the sensor in the radial direction;

[0020] θ: The angle between the line connecting the end point of one side of the chord and the center of the circle and the horizontal direction on the same side caused by radial deviation;

[0021] So the actual diameter

[0022] D=d+2*x (3)

[0023] D: Actual calculated diameter length

[0024] The result is saved as a set of results. When the product to be tested rotates one circle, 180 sets of results are obtained, from which the maximum value is selected as the maximum diameter of the product to be tested.

[0025] For the measurement of swing error, Figure 4 When the product to be tested is not rotating, the sensor reads once to obtain four distances: l1, l2, l3, and l4. Set the distance difference between the left and right sides

[0026] L 左 =l1–l2 (4)

[0027] L 右 =l3–l4 (5)

[0028] l1, l2, l3, l4: The four sensors on the horizontal plane correspond to the measured distances;

[0029] L 左: The vertical distance from the bottom of the bullet to the tip of the bullet on the left;

[0030] L 右 : The vertical distance from the right bullet bottom to the bullet tip;

[0031] When the product to be tested rotates 2°, the second set of data L is generated 左1 , L 右1 Subtract the corresponding data from the previous set to get △L 左 , △L 右 This is the runout value produced by rotating the product under test by 2°. |△L 左 |=|△L 右 |, the absolute values ​​of the two are equal. In order to increase the measurement accuracy, we finally calculated the 2° runout value.

[0032] △L=(|△L 左 |+|△L 右 |) / 2 (6)

[0033] △L: Final runout value of the product to be tested after rotating 2°;

[0034] △L 左 : Rotate the product to be tested by 2° to the left to measure the runout value;

[0035] △L 右 : Rotate the product to be tested by 2° and measure the runout value on the right side;

[0036] When the product to be tested is rotated 4°, the data generated is subtracted from the initial data to obtain L 左2 , L 右2 According to the previous calculation formula, the 4° runout value △L is obtained 2 The product to be tested will generate 179 △Ls when it rotates one circle. The maximum value among them is the maximum radial runout value of the product to be tested when it rotates one circle, which is the runout.

[0037] (III) Beneficial effects

[0038] The comprehensive detection device and detection method of physical quantities of the correction cabin provided by the above technical solution have the following beneficial effects:

[0039] 1. The patented structure of the present invention is relatively simple and compact, which reduces the error in the assembly process. The structure has strong adaptability and can be used to measure products within a certain size range. It improves the flexibility of the equipment and solves the problem of special machine for special purpose.

[0040] 2. The present invention uses a micron-level photoelectric sensor, which improves the measurement accuracy while abandoning the traditional method to achieve non-contact measurement, reduces the measurement error caused by manual measurement and avoids damage to the product surface.

[0041] 3. The present invention realizes real-time data collection and transmission statistics, utilizes heterogeneous data processing technology to integrate and analyze the statistical data, and finally generates a corresponding data format; the system can change the original manual recording method, avoid recording errors and recording losses, and can effectively manage and control the data.

[0042] 4. The present invention realizes full automation and one-button operation in manual mode, and can be incorporated into an automated production line to realize the function of automated detection.

[0043] 5. With respect to the physical parameters of the product that need to be tested, such as height, weight, center of mass, runout, maximum outer diameter, etc., the device of the present invention can measure these parameters simultaneously, thereby reducing the measurement time and improving the measurement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a front view of a physical quantity detection device of a correction cabin of the present invention.

[0045] Figure 2 It is an isometric diagram of a physical quantity detection device of a correction cabin of the present invention.

[0046] Figure 3 It is a top view of a physical quantity detection device of a correction cabin of the present invention.

[0047] Figure 4 This is the front view of the connection structure between the motor system and the rear support wheel.

[0048] Figure 5 It is an isometric diagram of the connection structure between the motor system and the rear support wheel.

[0049] Figure 6 This is the main view of the load backend structure.

[0050] Figure 7 It is a top view of the rear end structure of the load.

[0051] Figure 8 It is an isometric diagram of the load rear end structure.

[0052] Fig. 9 It is an isometric drawing of a limit bearing.

[0053] Fig.10 It is a schematic diagram of the calculation for the maximum outer diameter measurement in the measurement method.

[0054] Fig.11 It is a schematic diagram of the calculation of the swing difference in the measurement method.

[0055] In the figure: 1. Foot; 2. Fixing plate I; 3. Fixing plate II; 4. Fixing plate III; 5. Overall support platform; 6. Pressure sensor; 7. Encoder mounting plate; 8. Tailstock; 9. Rear support wheel; 10. Front support; 11. Runout measurement assembly; 12. Head distance sensor support frame; 13. Front transfer support for the product to be tested; 14. External hexagon screw; 15. Support body; 16. Encoder sheet metal cover; 17. Photoelectric distance sensor; 18. Wire slot sheet metal cover; 19 Synchronous belt sheet metal cover; 20. External pressure sensor Sensor protection cover I; 21. Servo motor sheet metal cover; 22. External pressure sensor protection cover II; 23. Support wheel locking nut; 24. Side sensor support frame; 25. Bottom sensor fixing frame; 26. Bottom sensor bracket; 27. Limit bearing; 28. Coupling; 29. ​​Tail double sensor support frame; 30. External encoder; 31. Synchronous gear belt; 32. Fixed bearing baffle; 33. Reducer; 34. Servo motor; 35. Front support wheel; 36. Front support wheel retaining ring; 37. Sensor insulation pad. DETAILED DESCRIPTION

[0056] In order to make the purpose, content and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples.

[0057] The structure of the comprehensive detection equipment for physical quantities of the correction cabin of this embodiment includes: a detection platform, a pressure measurement component, a photoelectric measurement component, a servo motor, and an external encoder; a front support wheel with adjustable height and two sets of rear support wheels of different sizes are arranged on the detection platform, and the four support wheels support the product to be tested to be placed horizontally; the servo motor drives one rear support wheel to rotate it, thereby driving the entire product to be tested to rotate, and an external encoder is installed on the other rear support wheel as a signal point for the servo motor to stop rotating; the photoelectric measurement component is a total of six photoelectric ranging sensors arranged at the head and bottom of the rear support wheel, which are used to measure the axial spatial position and length of the product to be tested; the pressure measurement component is four pressure sensors arranged at the front and rear ends of the detection platform, which read the sensor data and calculate the mass value of the product to be tested according to its different installation positions.

[0058] Reference Figures 1 to 9 As shown, the detection platform includes an overall supporting platform 5, at the bottom of which 8 feet 1 are arranged to support the entire equipment and be responsible for leveling the equipment; four pressure sensors 6 are placed on the overall supporting platform 5, and a supporting body 15 is installed on the upper end of the pressure sensor 6, and the front supporting wheel 35 and the rear supporting wheel 9 are installed on the supporting body 15.

[0059] According to the size of the product to be tested, support wheels can be installed on the front transfer support 13 of the product to be tested. The product to be tested is placed on the equipment and supported by the front support wheels 35 and the rear support wheels 9. At the same time, the limit bearing 27 is used as an axial limiter to fix the product to be tested.

[0060] A fixed bearing stopper 32 is provided on one side of the limit bearing 27 to prevent the limit bearing 27 from axial displacement but not to restrict its rotation.

[0061] For the front support wheel 35 and the rear support wheel 9, 66+GF30 material is used. This material has small deformation, stable size, strong wear resistance and will not scratch the surface of the product to be tested. The front support roller adopts a conical surface design to achieve position correction of the cabin during rotation.

[0062] The servo motor 34 is connected to the reducer 33 and provides driving force for the rear support wheel 9 through the synchronous gear belt 31. The external encoder 30 is connected to the rear support wheel 9 through the coupling 28 for recording data.

[0063] A plurality of photoelectric distance measuring sensors 17 are respectively arranged at the front and rear of the rear support wheel 9, and are respectively fixed by the head distance measuring sensor support frame 12, the tail double sensor support frame 29, the bottom sensor fixing frame 25 and the bottom sensor bracket 26.

[0064] A sensor heat insulation pad 37 is arranged between the photoelectric distance measuring sensor 17 and the corresponding mounting bracket.

[0065] Side sensor support frames 24 are respectively arranged on both sides of the photoelectric distance measuring sensor 17 at the rear side of the rear supporting wheel 9 .

[0066] The front support wheel 35 is installed on the support body 15 through the front support 10 , and a front support wheel retaining ring 36 is arranged between the front support wheel 35 and the support body 15 .

[0067] A plurality of fixing plates are provided on the side of the support body 15 , such as the fixing plate I2 , the fixing plate II3 , and the fixing plate III4 shown in the figure, for lateral positioning and supporting of the mounting parts on the support body 15 .

[0068] The external encoder 30 is mounted on the support body 15 via the encoder mounting plate 7 .

[0069] The rear support wheel 9 is installed on the support body 15 through the tailstock 8. The rear support wheel 9 is fixed on the tailstock 8 through the support wheel locking nut 23.

[0070] A swing difference measuring assembly 11 is also installed on the head distance measuring sensor support frame 12. When the rear supporting wheel drives the product to be measured to rotate, the swing difference measuring assembly 11 measures the runout value of the product to be measured.

[0071] The support body 15 is fixed to the pressure sensor 6 by means of hexagonal screws 14 .

[0072] The detection equipment also includes an encoder sheet metal cover 16, a wire trough sheet metal cover 18, a synchronous belt sheet metal cover 19, an external pressure sensor protection cover I20, an external pressure sensor protection cover II22, and a servo motor sheet metal cover 21, which respectively cover and protect the wire trough, synchronous belt, pressure sensor 6, and servo motor sheet metal opened on the detection equipment.

[0073] When the equipment is working, the two high-precision photoelectric distance sensors 17 in front and behind the rear support wheel 9 measure the spatial position and length of the product to be tested in the axial direction. At the same time, the four pressure sensors 6 collect the data obtained and calculate the mass value of the product to be tested according to their different installation positions. The center of mass of the product to be tested in the axial direction is calculated based on the measured mass and length using the torque balance calculation formula. The servo motor drives the rear right support wheel through the transmission of the synchronous gear belt to rotate it. Due to the friction between the product to be tested and the support wheel, the entire product to be tested rotates with it. Because the product to be tested must be guaranteed to rotate one circle during the calculation of the swing difference and the maximum outer diameter, during the rotation process, the minimum value of the distance sensor at the maximum outer diameter of the rear end is read, and the theoretical maximum outer diameter of the product to be tested is obtained by subtracting it according to the absolute distance of the installation position. At the same time, the distance sensor at the bottom end of the rear end can eliminate the error through the radial displacement △ generated during operation, and the comprehensive formula 7 is obtained by combining formula 1, formula 2, and formula 3 to calculate the maximum outer diameter.

[0074] D=(L-l2-l4)+2△*tanθ (7)

[0075] For the calculation of the swing difference, the change difference of the distance between the product to be tested and the sensor can be obtained by continuously reading the values ​​of the four surrounding photoelectric distance sensors. According to the formula

[0076] △L=(|△L 左 |+|△L 右 |) / 2 (8)

[0077] Calculate the radial runout value at different rotation angles. When the product to be tested rotates one circle, a set of runout value arrays can be obtained. The maximum value is selected by comparison as the maximum runout difference of the product to be tested. The distance sensor is designed in the corresponding position according to the different functions, but in order to adapt to different models of products to be tested, it is not absolutely fixed in design. It can be moved in a small range perpendicular to the measurement calculation plane for easy adjustment.

[0078] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A comprehensive detection method for physical quantities of a correction cabin, characterized in that: The detection is carried out based on a comprehensive detection device for physical quantities of a correction cabin, the detection device comprising: a detection platform, a pressure measurement component, a photoelectric measurement component, a servo motor, and an external encoder; a front support wheel with adjustable height and two sets of rear support wheels of different sizes are arranged on the detection platform, and the four support wheels support the product to be tested to be placed horizontally; the servo motor drives one rear support wheel to rotate, thereby driving the entire product to be tested to rotate, and an external encoder is installed on the other rear support wheel as a signal point for the servo motor to stop rotating; the photoelectric measurement component is a total of six photoelectric distance measuring sensors arranged at the head and bottom of the rear support wheel, which are used to measure the axial spatial position and length of the product to be tested; the pressure measurement component is four pressure sensors arranged at the front and rear ends of the detection platform, which read sensor data and calculate the mass value of the product to be tested according to their different installation positions; the detection platform comprises an overall support platform (5), the bottom of which is provided with 8 feet (1) to support the entire device and be responsible for leveling the device; four The pressure sensor (6) is placed on the overall support platform (5), the upper end of the pressure sensor (6) is installed with a support body (15), and the front support wheel 35 and the rear support wheel (9) are installed on the support body (15); a limit bearing (27) is arranged on the support body (15) to fix the product to be tested as an axial limiter; a fixed bearing baffle (32) is arranged on one side of the limit bearing (27) to prevent it from generating axial displacement but not to restrict its rotation; the front support wheel (35) and the rear support wheel (9) are made of 66+GF30 material; the servo motor (34) is connected to the reducer (33) and provides driving force for the rear support wheel (9) through the synchronous gear belt (31); the external encoder (30) is connected to the rear support wheel (9) through a coupling (28) to record data; a swing difference measurement component (11) is also installed on the head distance sensor support frame (12), and when the rear support wheel drives the product to be tested to rotate, the swing difference measurement component (11) measures the runout value of the product to be tested; The process of the detection method is as follows: first, the product to be tested is placed on the detection equipment, and the photoelectric distance sensor is used to measure the spatial position and length of the product to be tested in the axial direction; at the same time, four pressure sensors collect data to calculate the mass value of the product to be tested; the center of mass calculation formula is used to calculate the center of mass of the product to be tested in the axial direction according to the measured mass and length; then the product to be tested rotates, and during the entire rotation process, the minimum value of the photoelectric distance sensor at the rear end measuring the maximum outer diameter is read to obtain the maximum outer diameter of the product to be tested; at the same time, the distance between the product to be tested and the six photoelectric distance sensors is obtained through six photoelectric distance sensors, the spatial position of the product to be tested is determined, and the radial runout during the entire rotation process is calculated as the runout error; There are three photoelectric sensors at the head and bottom of the rear support wheel (9), one of which is designed at the bottom to measure the laser beam vertically upward, and the other two sensors are in a horizontal position to shoot oppositely, and the shooting laser coincides with the diameter of the slice circle of the product to be tested. For the measurement of the maximum outer diameter, the product to be tested rotates 360° and the sensor collects readings every 2°, and the diameter of the circle is calculated according to the theory: d=L-l2-l4 (1) d: The theoretical value of the diameter of the circle of the product to be tested; L: The installation distance between two opposing photoelectric sensors; l2: The reading of the object surface measured by the photoelectric sensor at the left end; l4: The reading of the object surface measured by the photoelectric sensor at the right end; During the actual rotation process, the reading of the bottom sensor has a distance difference of △. The compensation amount x is calculated. △ produces an angle θ, so the compensation amount is: x=△*tanθ (2) x: diameter compensation caused by radial displacement; △: The distance difference generated by the sensor in the radial direction; θ: The angle between the line connecting the end point of one side of the chord and the center of the circle and the horizontal direction on the same side caused by radial deviation; Actual diameter D=d+2*x (3) D: Actual calculated diameter length; The results are saved as a group of results. When the product to be tested rotates one circle, 180 groups of results are obtained, and the maximum value is selected as the maximum diameter of the product to be tested. When the product to be tested is not rotating, the sensor reads once to obtain four distances: l1, l2, l3, and l4. The distance difference between the left and right sides is set as follows: L 左 ＝l1–l2 (4) L 右 ＝l3–l4 (5) l1, l2, l3, l4: The four sensors on the horizontal plane correspond to the measured distances; L 左 : The vertical distance from the bottom of the bullet to the tip of the bullet on the left; L 右 : The vertical distance from the right bullet bottom to the bullet tip; When the product to be tested rotates 2°, the second set of data L is generated 左1 , L 右1 Subtract the corresponding data from the previous set to get △L 左 , △L 右 It is the runout value produced by rotating the product under test by 2°; |△L 左 |=|△L 右 |, the absolute values ​​of the two are equal. In order to increase the measurement accuracy, we finally calculated the 2° runout value. △L=(|△L 左 |+|△L 右 |) / 2 (6) △L: Final runout value of the product to be tested after rotating 2°; △L 左 : Rotate the product to be tested by 2° to the left to measure the runout value; △L 右 : Rotate the product to be tested by 2° and measure the runout value on the right side; When the product to be tested is rotated 4°, the data generated is subtracted from the initial data to obtain L 左2 , L 右2 According to the previous calculation formula, the runout value △L2 of 4° is obtained; when the product to be tested rotates one circle, 179 △Ls will be generated. The maximum value among them is screened out, which is the maximum radial runout value of the product to be tested when it rotates one circle, that is, the runout.

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