CN113804117A - System and method for measuring bore diameter of gun barrel rifling - Google Patents
System and method for measuring bore diameter of gun barrel rifling Download PDFInfo
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- CN113804117A CN113804117A CN202110902071.0A CN202110902071A CN113804117A CN 113804117 A CN113804117 A CN 113804117A CN 202110902071 A CN202110902071 A CN 202110902071A CN 113804117 A CN113804117 A CN 113804117A
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 55
- 239000000523 sample Substances 0.000 claims abstract description 55
- 238000005259 measurement Methods 0.000 claims abstract description 19
- 230000003287 optical effect Effects 0.000 claims abstract description 8
- 239000011324 bead Substances 0.000 claims description 10
- 210000000078 claw Anatomy 0.000 claims description 10
- 238000009434 installation Methods 0.000 abstract description 4
- 238000004364 calculation method Methods 0.000 abstract description 3
- 230000008859 change Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
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- 230000035939 shock Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
- G01B11/12—Measuring arrangements characterised by the use of optical techniques for measuring diameters internal diameters
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- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a system and a method for measuring the bore diameter of a gun barrel rifling, wherein the system comprises a measuring vehicle unit, a laser displacement sensor controller and a control computer, the measuring vehicle unit is connected with the laser displacement sensor controller through a probe optical cable, and the laser displacement sensor controller is connected with the control computer. The invention converts the inner diameter of the gun barrel into the distance measurement value converted from the eccentricity of the probe of the laser displacement sensor and the reflected light sensed by the probe, and the probe has a small structure, thereby solving the problem of strict limitation of installation size. In addition, the measuring system is more stable. In addition, the measurement and calculation data of the diameter of the inner wall of the gun barrel come from distance parameters measured by the probe of the laser displacement sensor and are related to the eccentric position of the probe.
Description
Technical Field
The invention relates to the technical field of inner diameter measurement, in particular to a system and a method for measuring the inner diameter of a rifling of a gun barrel.
Background
During the shooting process of the artillery, the inner diameter of the barrel of the artillery changes due to factors such as ablation and abrasion. The structural size condition of the gun bore is an important basis for judging the service life of the barrel and analyzing the shooting precision. Therefore, in various artillery and ammunition tests or firing test planning tests, the inner diameter of the barrel is required to be measured so as to check whether the size meets the specification of technical conditions or not and the change situation of the inner diameter of the barrel along with the increase of the number of projectiles, and compared with the detection of the inner diameter of a general pipeline, the detection of the artillery barrel mainly has the following special properties:
1. the cannon barrel is long and narrow, the ambient brightness is low, and the cannon barrel is difficult to observe by human eyes;
2. the inner diameter of the barrel is generally smaller, a measuring instrument is difficult to enter, and the measuring work is difficult to develop;
3. the barrel mainly comprises a slide chamber and a line chamber, and the required diameter measuring instrument can be simultaneously suitable for the two gun chambers;
4. the measurement process can not cause damage to the surface of the barrel bore, and the measurement precision requirement is high.
At present, the internal diameter of the gun barrel pipe is measured at home and abroad mainly by mechanical, electronic and optical sensors. The traditional mechanical method has small diameter measuring range and low precision; the electronic and optical sensors have high requirements on installation accuracy, poor shock resistance and complex structure, and are difficult to meet the measurement requirements of small-caliber artillery.
Disclosure of Invention
In view of the problems in the prior art, the invention aims to provide a system and a method for measuring the bore diameter of a gun barrel rifling.
In order to realize the purpose of the invention, the technical scheme provided by the invention is as follows:
a gun barrel rifling inner diameter measuring system comprises a measuring vehicle unit, a laser displacement sensor controller and a control computer, wherein the measuring vehicle unit is connected with the laser displacement sensor controller through a probe optical cable, and the laser displacement sensor controller is connected with the control computer;
the utility model discloses a measuring vehicle, including measuring vehicle shell, rotating bracket, laser displacement sensor probe and preceding motor flange, back motor flange, measuring vehicle shell left end and right-hand member set up respectively preceding motor flange, back motor flange, preceding motor flange and motor unit, rotating bracket sets up motor flange, back motor flange in the front and rotate and connect, motor unit with rotating bracket is connected, be provided with laser displacement sensor probe on the rotating bracket, measuring vehicle shell with the position that laser displacement sensor probe corresponds is provided with the measurement light trap, according to 90 intervals on measuring vehicle shell, opens four rectangular holes that the width is 4mm along circumference, supplies displacement sensor's detection light beam to see through, on reacing the bore inner wall, remains 2 ~ 3 m's splice bar. At the location of the connecting rib, the light beam is blocked and the distance to the inner wall of the area cannot be measured. The rotary support is connected with the laser displacement sensor probe through a positioning bead structure, and the position of the laser displacement sensor probe can be adjusted through adjusting the positioning bead structure.
The front motor flange and the rear motor flange are respectively connected with a front centering claw and a rear centering claw.
Correspondingly, the method for measuring the bore line inner diameter of the gun barrel is further provided, and the bore line inner diameter is calculated by a self-centering inner diameter measurement principle; the measured and calculated data are directly from the eccentricity of the laser displacement sensor probe and the distance values measured at each rotation angle.
During the use, pack this system into the barrel that awaits measuring after, the motor element drives and rotates the support rotation to drive laser displacement sensor probe and rotate, the measuring light that the probe sent is penetrated the barrel inner wall surface through measuring the light trap and is reflected back, and only the monochromatic light that satisfies the confocal condition can be sensed by the sensor. And calculating the sensed wavelength, and converting to obtain a distance value so as to solve a corresponding inner diameter value.
Compared with the prior art, the invention has the following characteristics and beneficial effects:
(1) to the accurate sensing of displacement in narrow and small space, adopt laser displacement sensor measurement scheme, convert the gun barrel internal diameter into the distance measurement value that laser displacement sensor probe eccentricity and the reverberation that the probe sensing was sensed converted out, the probe structure is small and exquisite, has solved the strict limited problem of installation size.
(2) The laser displacement sensor probe is fixed on the rotating support, the position is adjusted by the aid of the positioning balls, transverse displacement of the probe is limited, the body axis is coaxial with the barrel axis by virtue of centering action of the front centering claw and the rear centering claw, the measuring head axis is perpendicular to the barrel axis, and the probe can only rotate with the rotating support along with the speed reduction stepping motor to perform parameter measurement, so that a measuring system is stable.
(3) The measurement and calculation data of the diameter of the inner wall of the gun barrel come from distance parameters measured by a probe of the laser displacement sensor and are related to the eccentric position of the probe. After the position distance of the probe is adjusted and fixed through the positioning balls each time, the eccentric distance of the probe is fixed, and the probe can be corrected through calibration, so that the influence of the processing and mounting errors of the probe and the rotating support on a measuring result is well eliminated, and the measuring precision is improved.
Drawings
FIG. 1 is a schematic block diagram of embodiment 1 of the system provided herein;
FIG. 2 is a schematic block diagram of embodiment 2 of the system provided herein;
FIG. 3 is a first schematic view of a mounting structure of a laser displacement sensor probe provided herein;
FIG. 4 is a second schematic view of a mounting structure of a laser displacement sensor probe provided herein;
FIG. 5 is a schematic diagram illustrating a self-centering inner diameter solution principle provided by the present application;
in the figure, 101, a motor unit, 104, a rotating bracket, 105, a laser displacement sensor probe, 106, a probe optical cable, 107, a control computer, 108 and a laser displacement sensor controller; 201. the device comprises a speed-reducing stepping motor, 202, a front centering claw, 203, a front motor flange, 204, a front end bearing, 205, a motor cable, 206, a rotation limiting contact, 207, a rear end bearing, 208, a rear centering claw, 209, a laser displacement sensor probe, 210, a gun barrel inner wall, 211, a measuring vehicle shell, 212, a rotation support, 213, a probe optical cable, 214, a rear motor flange, 215, a push rod seat, 216, a positioning bead structure, 217, a supporting beam, 218 and a measuring light hole.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The invention is described in further detail below with reference to the figures and specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1, the inside diameter measuring system of the rifling of the gun barrel provided by this embodiment includes a measuring vehicle unit, a laser displacement sensor controller 108 and a control computer 107, where the measuring vehicle unit is connected to the laser displacement sensor controller 108 through a probe optical cable 106, and the laser displacement sensor controller 108 is connected to the control computer 107;
the utility model discloses a laser displacement sensor probe 105, including motor element 101, measuring car shell 211, rotation support 104, laser displacement sensor probe 105 and preceding motor flange 203, back motor flange 214, 11 left ends of measuring car shell and right-hand member set up respectively preceding motor flange 203, back motor flange 214, preceding motor flange 203 and motor element 101, rotation support 104 sets up motor flange 203, back motor flange 214 in the front and rotates and be connected, motor element 101 with rotation support 104 is connected, be provided with laser displacement sensor probe 105 on the rotation support 104, on measuring car shell 211 with the position that laser displacement sensor probe 105 corresponds is provided with and measures light trap 218.
During the use, pack this system into the barrel that awaits measuring after, the motor element drives and rotates the support rotation to drive laser displacement sensor probe and rotate, the measuring light that the probe sent is penetrated the barrel inner wall surface through measuring the light trap and is reflected back, and only the monochromatic light that satisfies the confocal condition can be sensed by the sensor. And calculating the sensed wavelength, and converting to obtain a distance value so as to solve a corresponding inner diameter value.
Example 2
As shown in fig. 2 to 4, in the present embodiment, the rotating bracket 104 is connected to the laser displacement sensor probe 105 through a positioning bead structure, and the position of the laser displacement sensor probe 105 can be adjusted by adjusting the positioning bead structure. When measuring gun barrels with different calibers, the fixed position of the laser displacement sensor probe 105 is switched by rotating the positioning bead structure on the bracket 104 according to the measured calibers.
The positioning bead structure can adopt the known technology.
In addition, after the measuring vehicle unit is installed in the cannon barrel to be measured, under the centering action of the front and rear centering claws, the axis of the whole system is coaxial with the axis of the barrel, and the longitudinal axis of the measuring vehicle is vertical to the axis of the barrel. In use, the front and rear centering jaws 202 and 208 of the respective calibers may be replaced.
Wherein, the power unit can adopt a speed reduction stepping motor.
In this embodiment, when in use, the rear motor flange 214 is connected to the push rod base 215, after the measurement vehicle unit is installed in the barrel of the artillery gun to be measured through the push rod base 215, the whole device is fixed in the barrel under the centering action of the front and rear centering claws, after the motor unit is started, the laser displacement sensor probe 105 rotates along with the reduction stepping motor 201 in the rotating bracket to perform rotary scanning, during the scanning process, the laser displacement sensor probe 105 emits a beam of broad-spectrum polychromatic light (white), and the spectral dispersion occurs through the dispersion lens to form monochromatic lights with different wavelengths, wherein each wavelength corresponds to a distance value to the measured object. The measuring light is reflected back by the inner wall 210 of the gun barrel through the measuring light hole 218, only monochromatic light meeting confocal conditions can be sensed by the sensor through the measuring light hole 218, and the distance value from the probe to the inner wall 210 of the gun barrel is converted out through calculating the sensed wavelength. Because the laser displacement sensor probe 105 has an eccentric amount when fixed by the positioning bead structure 216, the corresponding inner diameter value can be solved by the eccentric amount and the measured distance value.
Correspondingly to the embodiment, the embodiment provides a method for measuring the bore line inner diameter of the gun barrel by using the system, wherein the bore line inner diameter is calculated by a self-centering inner diameter measurement principle; the measured and calculated data are directly from the eccentricity of the laser displacement sensor probe and the distance values measured at each rotation angle.
FIG. 5 is a schematic diagram illustrating the principle of the self-centering inner diameter solution of the present invention.
In the measuring method, the displacement sensor measuring head performs rotary scanning under the driving of the speed reduction stepping motor. And setting the stepping motor to rotate for N steps, and rotating the measuring head of the displacement sensor just for one circle. At each corner, the distance of the inner wall of the barrel to the reference position of the displacement sensor is measured once. Because of the relation between the result and the measuring range, the measuring head of the displacement sensor only measures the distance d from the inner wall of the gun barrel to the reference positionvHowever, the distance from the reference position to the center of rotation is constant, and is adjusted and solidified at the time of installation, and is set as ds. The distance from the inner wall of the barrel to the center of rotation is then: r isri＝ds+dv
Let the rotation center be a coordinate of Or(xs,ys) Then (x) of each point on the inner wall of the barreli,yi) The rectangular coordinates are:
xi＝rri×cos(φi)+xs＝ds×cos(φi)+dv×cos(φi)+xs
yi＝rri×sin(φi)+ys＝ds×sin(φi)+dv×sin(φi)+ys
coordinate point (x) whether the rotation center is at the axis of the gun barrel or noti,yi) The relative position relation between each point in the series does not change, and the coordinate point (x)i,yi) The shape of the inner wall of the gun barrel formed by the series of points can not be changed, and the inner diameter of the gun barrel can not be changed. Thus, the coordinate point (x)i,yi) The series fully describes the shape of the inner wall of the barrel. The change of the coordinates of the center of rotation is made only at the coordinate point (x)i,yi) Each point of the series is superimposed with a respective rotation point coordinate. On the other hand, the coordinate point (x)i,yi) The center of the series does not change, the coordinates of the center of rotation change only so that the coordinate point (x)i,yi) The centers of the series are superimposed by a rotation center point coordinate.
Setting the center of the cross section circle of the gun barrel as a coordinate Ot(xt,yt) Then, then
Taking the axis of the gun barrel as a round point, and the distance from each point of the gun barrel wall is as follows:
according to the most basic fitting method, the average radius of the barrel is:
as can be seen from the above discussion and derivation, the measurement and calculation of the diameter of the inner wall of the barrel comes directly from dsAnd the distance value d measured at each cornervAmount of positional deviation from center of rotation (x)s,ys) It has no relation. When the method is used for measuring the radius of the gun barrel, automatic center compensation is carried out, namely self-centering measurement is carried out.
The technical method greatly reduces the pressure of the centering support device on the mechanical structure, and can eliminate the influence of the center deviation on the measurement precision on the premise of ensuring the precision and stability of the support.
The technical means not described in detail in the present application are known techniques.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. The utility model provides a artillery barrel rifling internal diameter measurement system which characterized in that: the device comprises a measuring vehicle unit, a laser displacement sensor controller (108) and a control computer (107), wherein the measuring vehicle unit is connected with the laser displacement sensor controller (108) through a probe optical cable (106), and the laser displacement sensor controller (108) is connected with the control computer (107);
the measuring vehicle unit comprises a motor unit (101), a measuring vehicle shell (211), a rotating support (104), a laser displacement sensor probe (105), a front motor flange (203), a rear motor flange (214), wherein the left end and the right end of the measuring vehicle shell (11) are respectively arranged on the front motor flange (203), the rear motor flange (214), the front motor flange (203) and the motor unit (101), the rotating support (104) is arranged on the front motor flange (203), the rear motor flange (214) and is rotatably connected, the motor unit (101) is connected with the rotating support (104), the laser displacement sensor probe (105) is arranged on the rotating support (104), and a measuring light hole (218) is formed in the position corresponding to the laser displacement sensor probe (105) on the measuring vehicle shell (211).
2. The system of claim 1, wherein: the rotating support (104) is connected with the laser displacement sensor probe (105) through a positioning bead structure, and the position of the laser displacement sensor probe (105) can be adjusted through adjusting the positioning bead structure.
3. The system of claim 1, wherein: the front motor flange (203) and the rear motor flange (214) are respectively connected with a front centering claw (202) and a rear centering claw (208).
4. A method for measuring the bore line inner diameter of a gun barrel is characterized by comprising the following steps: the inner diameter of the rifling is calculated by a self-centering inner diameter measurement principle; the measured and calculated data are directly from the eccentricity of the laser displacement sensor probe and the distance values measured at each rotation angle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110902071.0A CN113804117A (en) | 2021-08-06 | 2021-08-06 | System and method for measuring bore diameter of gun barrel rifling |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110902071.0A CN113804117A (en) | 2021-08-06 | 2021-08-06 | System and method for measuring bore diameter of gun barrel rifling |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114608434A (en) * | 2022-03-16 | 2022-06-10 | 中国人民解放军69214部队 | Diameter measuring device and method for pipe diameter of gun barrel |
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2021
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114608434B (en) * | 2022-03-16 | 2023-06-13 | 中国人民解放军69214部队 | Gun barrel pipe diameter measuring device and detection method |
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