CN111102931A - Solid engine grain inner hole diameter optical fiber sensing continuous measuring device - Google Patents
Solid engine grain inner hole diameter optical fiber sensing continuous measuring device Download PDFInfo
- Publication number
- CN111102931A CN111102931A CN201911096414.8A CN201911096414A CN111102931A CN 111102931 A CN111102931 A CN 111102931A CN 201911096414 A CN201911096414 A CN 201911096414A CN 111102931 A CN111102931 A CN 111102931A
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- CN
- China
- Prior art keywords
- inner hole
- optical fiber
- guide rail
- diameter
- solid engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 33
- 239000007787 solid Substances 0.000 title claims abstract description 25
- 239000002360 explosive Substances 0.000 claims abstract description 19
- 238000005259 measurement Methods 0.000 claims abstract description 18
- 238000006073 displacement reaction Methods 0.000 claims abstract description 14
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 5
- 238000012360 testing method Methods 0.000 abstract description 5
- 238000005096 rolling process Methods 0.000 abstract 2
- 230000000977 initiatory effect Effects 0.000 abstract 1
- 239000000835 fiber Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000004449 solid propellant Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
Images
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/268—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light using optical fibres
Abstract
An optical fiber sensing continuous measuring device for the diameter of an inner hole of a charge column of a solid engine belongs to the technical field of engines. The invention comprises the following steps: MEMS optical fiber displacement sensor, linear rolling guide rail and drawing wire; the MEMS optical fiber displacement sensor realizes high-precision measurement of displacement by reading the distance between grating stripes, is fixed on a linear rolling guide rail sliding block, the guide rail is fixed at the axis of a measured explosive column through a tool, and the diameter of an inner hole of the explosive column can be continuously measured by driving the sliding block to move along the guide rail through a traction line; the tool position is adjusted, and the diameters of inner holes of the explosive columns at different angles can be measured. The method for measuring the diameter of the inner hole of the grain has small volume, the minimum measurable inner hole diameter is 60mm, and the method can be used for measuring the diameters of the inner holes of various solid engine tubular grains and effectively solves the problem of measuring the diameter of the inner hole of the grain with large length-diameter ratio; based on the MEMS optical fiber displacement testing technology, the testing precision is high, no current exists during working, and the safety to initiating explosive devices is high; can realize the continuous test of the diameter of the inner hole of the grain.
Description
Technical Field
The invention relates to an optical fiber sensing continuous measuring device for the diameter of an inner hole of a charge column of a solid engine, belonging to the technical field of engines.
Background
The solid rocket engine is a power part of the missile, and the solid propellant charge is a main structural part and an energy material of a missile system and is also one of the irreparable weakest links in the missile engine. Charge bore deformation and structural integrity are key factors affecting ballistic performance and missile operational reliability in engines, to which most solid engine failures are closely related.
For a long time, the method is limited by the structural size, the mechanical property and the safety performance of a solid engine, and particularly for tactical missile solid engines with small inner hole diameters and large long diameters, the method is a prominent problem troubling the industry to accurately measure the change of the inner hole diameter. In recent years, some vision-based solid engine inner hole diameter measuring methods appear, good effects are obtained on large-scale solid engines, but the practical problem of large size generally exists, and the urgent application requirements of tactical missile solid engines with small inner hole diameters cannot be met.
Disclosure of Invention
The technical problem solved by the invention is as follows: the device overcomes the defects of the prior art, provides the optical fiber sensing continuous measuring device for the inner hole diameter of the explosive column of the solid engine, has small volume, the minimum measurable inner hole diameter of 60mm, can be used for testing the inner hole diameters of various tubular explosive columns of the solid engine, and effectively solves the testing problem of the inner hole diameter of the explosive column with large length-diameter ratio.
The technical solution of the invention is as follows: an optical fiber sensing continuous measuring device for the diameter of an inner hole of a charge column of a solid engine comprises a slide block assembly, a linear guide rail and a traction wire; the sliding block assembly comprises a sensor, a connecting bracket, a signal output optical fiber, a spring, a sliding block and a measuring terminal;
guide rail channels are arranged on two sides of the linear guide rail, and the sliding block is matched with the guide rail channels and can slide on the linear guide rail;
the sensor is arranged on the sliding block through the connecting bracket; one end of the compression spring is connected with the measuring terminal, and the other end of the compression spring is in contact with the sensor packaging sleeve;
the measuring terminal is used for contacting the surface of the inner hole of the measured explosive column and measuring the diameter change of the inner hole of the explosive column;
the signal output optical fiber is connected with the sensor and used for outputting a measuring signal;
the traction wires are fixedly arranged at the two ends of the sliding block along the direction of the linear guide rail.
Further, the spring is a stainless steel compression spring, and the rigidity of the spring does not exceed 15N/mm.
Further, the sensor is a MEMS optical fiber displacement sensor.
Further, the measuring terminal is of a spherical structure.
Furthermore, the connecting support is used for enabling the center of the position of the sensor after installation to be located on the central axis of the inner hole of the tested explosive column.
Further, the linear guide rail is made of high-strength alloy steel, and the straightness is +/-0.02.
Further, the movement of the slide is controlled by a pull wire for continuous measurement and alignment of the measurement point position.
Furthermore, the linear guide rail can rotate around the central shaft, so that the diameter of the inner hole of the tested explosive column at different angles can be measured.
Compared with the prior art, the invention has the advantages that:
(1) the characteristic length of the sensor is reduced, and the sensor can be suitable for measuring the tactical missile engine grain with small inner hole diameter;
(2) the sensor can freely move along the axial direction of the inner hole, and can realize continuous measurement of the diameter of the inner hole at different angles;
(3) the optical fiber displacement sensor is free of electricity, and the intrinsic safety of the solid propellant is realized;
(4) the invention has high measurement precision which can reach 0.01 mm;
(5) the invention is suitable for the environment with low temperature ranging from-60 ℃ to high temperature plus 70 ℃.
Drawings
FIG. 1 is a schematic view of a measuring device according to the present invention;
FIG. 2 is a schematic diagram of a matching structure of the MEMS optical fiber displacement sensor and the slider.
Detailed Description
The present invention will be described in more detail below with reference to the accompanying drawings, which illustrate embodiments of the invention. This invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
An optical fiber sensing continuous measuring device for the diameter of an inner hole of a charge column of a solid engine comprises a slide block assembly 1, a linear guide rail 2 and a traction wire 3; the slider assembly 1 comprises a sensor 4, a connecting bracket 5, a signal output optical fiber 6, a spring 7, a slider 8 and a measuring terminal 9; guide rail channels are arranged on two sides of the linear guide rail 2, and the sliding block 8 is matched with the guide rail channels and can slide on the linear guide rail 2; the sensor 4 is arranged on the sliding block 8 through the connecting bracket 5; one end of the compression spring 7 is connected with the measuring terminal 9, and the other end of the compression spring is in contact with the packaging sleeve of the sensor 4; the measuring terminal 9 is used for contacting the surface of the inner hole of the measured explosive column and measuring the diameter change of the inner hole of the explosive column; the signal output optical fiber 6 is connected with the sensor 4 and used for outputting a measuring signal; the traction wire 3 is fixedly arranged at two ends of the sliding block 8 along the direction of the linear guide rail 2.
Preferably, the sensor 4 is a MEMS fiber optic displacement sensor.
As shown in figure 1, the solid engine grain inner hole diameter optical fiber sensing continuous measuring device comprises a sensor slide block assembly 1, a linear guide rail 2 and a traction wire 3. Opening a hole on the sliding block according to the size of the shell of the MEMS optical fiber displacement sensor, enabling the sliding block to penetrate through the hole, and connecting the sliding block and the bracket; the linear guide rail 2 is provided with a hole, so that a sliding block can be arranged on the linear guide rail 2, and the MEMS optical fiber displacement sensor can pass through the hole; the traction wires 3 are fixed at the two ends of the sliding block, and the sliding block can continuously move in the corresponding direction by drawing the traction wires in different directions. The movement of the slide 8 is controlled by the traction wire 3 for continuous measurement and alignment of the measurement point position.
Preferably, the material of the linear guide rail 2 is high-strength alloy steel, and the straightness is +/-0.02.
Further, the linear guide rail 2 can rotate around the central shaft, and the diameter of the inner hole of the tested explosive column at different angles can be measured.
Fig. 2 is a specific display of a sensor slider assembly 1, comprising a MEMS fiber displacement sensor 4, a connecting bracket 5, a signal output fiber 6, a spring 7, a slider 8 and a measurement terminal 9. The spring 7 has lower rigidity so as to reduce the damage to the medicine surface; the measuring terminal 9 is connected with the MEMS optical fiber displacement sensor 4 through the spring 7; the MEMS optical fiber displacement sensor 4 is connected with the sliding block 8 through the connecting bracket 5. The connecting bracket 5 is used for enabling the center of the position of the sensor 4 after being installed to be positioned on the central axis of the inner hole of the tested explosive column.
Preferably, the spring 7 is a stainless steel compression spring, the stiffness of which does not exceed 15N/mm.
Preferably, the measuring terminal 9 is a spherical structure.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (8)
1. The utility model provides a solid engine powder column hole diameter optical fiber sensing continuous measurement device which characterized in that: comprises a slide block assembly (1), a linear guide rail (2) and a traction wire (3); the slider assembly (1) comprises a sensor (4), a connecting bracket (5), a signal output optical fiber (6), a spring (7), a slider (8) and a measuring terminal (9);
guide rail channels are arranged on two sides of the linear guide rail (2), and the sliding block (8) is matched with the guide rail channels and can slide on the linear guide rail (2);
the sensor (4) is arranged on the sliding block (8) through the connecting bracket (5); one end of the compression spring (7) is connected with the measuring terminal (9), and the other end of the compression spring is in contact with the packaging sleeve of the sensor (4);
the measuring terminal (9) is used for contacting the surface of the inner hole of the measured explosive column and measuring the diameter change of the inner hole of the explosive column;
the signal output optical fiber (6) is connected with the sensor (4) and is used for outputting a measuring signal;
the traction wires (3) are fixedly arranged at two ends of the sliding block (8) along the direction of the linear guide rail (2).
2. The solid engine grain inner hole diameter optical fiber sensing continuous measurement device of claim 1, characterized in that: the spring (7) is a stainless steel compression spring, and the rigidity of the spring does not exceed 15N/mm.
3. The solid engine grain inner hole diameter optical fiber sensing continuous measurement device of claim 1, characterized in that: the sensor (4) is an MEMS optical fiber displacement sensor.
4. The solid engine grain inner hole diameter optical fiber sensing continuous measurement device of claim 1, characterized in that: the measuring terminal (9) is of a spherical structure.
5. The solid engine grain inner hole diameter optical fiber sensing continuous measurement device of claim 1, characterized in that: the connecting bracket (5) is used for enabling the center of the position of the sensor (4) after installation to be positioned on the central axis of the inner hole of the tested explosive column.
6. The solid engine grain inner hole diameter optical fiber sensing continuous measurement device of claim 1, characterized in that: the linear guide rail (2) is made of high-strength alloy steel, and the straightness is +/-0.02.
7. The solid engine grain inner hole diameter optical fiber sensing continuous measurement device of claim 1, characterized in that: the movement of the slide (8) is controlled by a traction wire (3) for continuous measurement and alignment of the measurement point position.
8. The solid engine grain inner hole diameter optical fiber sensing continuous measurement device of claim 1, characterized in that: the linear guide rail (2) can rotate around the central shaft, and the diameter of the inner hole of the tested explosive column at different angles can be measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911096414.8A CN111102931A (en) | 2019-11-11 | 2019-11-11 | Solid engine grain inner hole diameter optical fiber sensing continuous measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911096414.8A CN111102931A (en) | 2019-11-11 | 2019-11-11 | Solid engine grain inner hole diameter optical fiber sensing continuous measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111102931A true CN111102931A (en) | 2020-05-05 |
Family
ID=70420647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911096414.8A Pending CN111102931A (en) | 2019-11-11 | 2019-11-11 | Solid engine grain inner hole diameter optical fiber sensing continuous measuring device |
Country Status (1)
| Country | Link |
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| CN (1) | CN111102931A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116952182A (en) * | 2023-09-19 | 2023-10-27 | 北京理工大学 | Internal diameter measuring device and method for solid rocket engine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7815530B2 (en) * | 2008-06-20 | 2010-10-19 | Joseph M Cannata | Golf ball proximity to hole measurement |
| CN103234467A (en) * | 2013-04-19 | 2013-08-07 | 中北大学 | Method and device for measuring thickness of bonding layer of variable-diameter solid rocket engine |
| KR101944929B1 (en) * | 2017-03-23 | 2019-02-01 | 박근휘 | Apparatus for inspecting tap hole |
| CN109596080A (en) * | 2019-01-14 | 2019-04-09 | 燕山大学 | Damper inner hole of cylinder instrument for testing precision |
-
2019
- 2019-11-11 CN CN201911096414.8A patent/CN111102931A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7815530B2 (en) * | 2008-06-20 | 2010-10-19 | Joseph M Cannata | Golf ball proximity to hole measurement |
| CN103234467A (en) * | 2013-04-19 | 2013-08-07 | 中北大学 | Method and device for measuring thickness of bonding layer of variable-diameter solid rocket engine |
| KR101944929B1 (en) * | 2017-03-23 | 2019-02-01 | 박근휘 | Apparatus for inspecting tap hole |
| CN109596080A (en) * | 2019-01-14 | 2019-04-09 | 燕山大学 | Damper inner hole of cylinder instrument for testing precision |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116952182A (en) * | 2023-09-19 | 2023-10-27 | 北京理工大学 | Internal diameter measuring device and method for solid rocket engine |
| CN116952182B (en) * | 2023-09-19 | 2023-12-29 | 北京理工大学 | Internal diameter measuring device and method for solid rocket engine |
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Application publication date: 20200505 |