CN109975420B - Water logging focusing ultrasonic probe parameter precision measurement device - Google Patents
Water logging focusing ultrasonic probe parameter precision measurement device Download PDFInfo
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- CN109975420B CN109975420B CN201711444905.8A CN201711444905A CN109975420B CN 109975420 B CN109975420 B CN 109975420B CN 201711444905 A CN201711444905 A CN 201711444905A CN 109975420 B CN109975420 B CN 109975420B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/24—Probes
- G01N29/2456—Focusing probes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention belongs to the technical field of water immersion ultrasonic detection, in particular to a water immersion focusing ultrasonic probe parameter precision measurement device, which comprises a water box assembly, a six-degree-of-freedom precision moving sliding table and a parameter measurement assembly, wherein the water box assembly is provided with coupling water, the parameter measurement assembly comprises a focusing parameter measurement tool and an angle measurement tool, and a calibration probe and a calibration tube are arranged in the water box assembly; six-degree-of-freedom precise movement sliding table can move up and down and comprises a measurement mounting seat and a pressing structure, a probe to be measured is placed in a V-shaped groove of a focusing parameter measurement tool, the angle measurement tool comprises an angle measurement mounting seat and an angle swing mandrel, and the parameter measurement device of the water immersion focusing ultrasonic probe can realize precise measurement of parameters such as a probe sound beam angle, a focal length, a focal spot, a focal column and the like. Parameters such as a probe focal length, a focal spot, a focal column and the like are obtained by measuring the probe head fillet sound beam echo, and a probe sound beam angle is obtained by measuring the sound beam echo of the outer wall of the thin-wall calibration tube.
Description
Technical Field
The invention belongs to the technical field of water immersion ultrasonic detection, and particularly relates to a device for measuring parameters of a water immersion ultrasonic probe.
Background
The water immersion focusing ultrasonic probe is an ultrasonic probe widely applied in industrial production, and ultrasonic parameter measurement and focusing parameter measurement of the probe are very important to ultrasonic inspection capability, and comprise the angle, focal length, focal spot and focal column of an acoustic beam of the water immersion focusing ultrasonic probe.
The frequency and bandwidth of an ultrasound probe affect the ability of ultrasound to propagate in a medium and the reflective diffraction characteristics of the ultrasound after encountering a reflector. For test objects of different materials and sizes, the appropriate probe frequency and bandwidth should be selected.
The angle of the water immersion focusing probe is generally 0 degrees, however, due to the influence of a processing technology, the angle of the water immersion focusing probe may have certain deviation, and the angle deviation can be ensured to be within a certain error range by measuring the angle.
The focal length of the water immersion focusing ultrasonic probe refers to the position with the highest ultrasonic energy of the probe, and the focal spot refers to the range of probe movement after the probe moves along the vertical sound beam plane and the probe energy decays to a certain amount (such as-6 dB). The focal column refers to the range of probe movement after the probe energy decays to a certain amount (such as-6 dB) after the probe moves up and down along the parallel sound beam direction. The water immersion focusing ultrasonic probe performs detection at a position with higher energy to obtain a better detection effect, so that focusing parameters such as a focal length, a focal spot, a focal column and the like are measured, the coverage range of the water immersion focusing ultrasonic probe can be obtained, and the parameters of ultrasonic scanning are optimized.
Disclosure of Invention
The invention aims to provide a parameter precise measuring device for a water immersion focusing ultrasonic probe, which can measure the angle, focal length, focal spot and focal column of the water immersion ultrasonic probe.
The technical scheme of the invention is as follows:
the utility model provides a probe swing angle measuring tool, includes the angle measurement mount pad and locates the rotatable angle swing dabber of angle measurement mount pad lower extreme, the probe that awaits measuring install and rotate along with the angle swing dabber at angle swing dabber, angle swing dabber stretch out and install swing scale and angle swing pointer on the one section of angle measurement mount pad lower end plate face, wherein angle swing scale is fixed relative angle measurement mount pad, angle swing dabber stretch out and install angle swing torsional spring and probe mount pad in proper order on the other section of angle measurement mount pad lower end plate face, probe mount pad on install the probe that awaits measuring, probe mount pad rotate along with angle swing dabber together, angle swing scale one side be equipped with the mount pad, angle swing knob passes through the mount pad install on angle swing scale, angle swing knob's tip with angle swing pointer contact.
The probe pressing plate is arranged at the lower end of the probe mounting seat, the probe pressing plate compresses the detected probe in the probe mounting seat, and two sides of the probe pressing plate are through spring pin shaft through holes.
The spring pin shaft is provided with a probe pressing plate spring, the end part of the spring pin shaft is provided with a spring pressing plate, and the spring pressing plate presses the probe pressing plate spring.
The parameter precise measurement device comprises a water box assembly, a six-degree-of-freedom precise movement sliding table and a parameter measurement assembly, wherein the six-degree-of-freedom precise movement sliding table and the parameter measurement assembly are arranged in the water box assembly, the parameter measurement assembly comprises a focusing parameter measurement tool and an angle measurement tool, and a calibration probe and a calibration tube with the same height are arranged in the water box assembly; the upper end of the water box assembly is provided with a movable sliding table mounting seat with adjustable height, and the lower end of the movable sliding table mounting seat is fixedly provided with a six-degree-of-freedom precise movable sliding table; the focusing parameter measuring tool comprises a measuring installation seat and a pressing structure arranged at the lower end of the measuring installation seat, wherein the measuring installation seat is fixed on the lower surface of a lifting sliding table of the six-degree-of-freedom precision moving sliding table, a V-shaped groove is formed in the lower end of the measuring installation seat, a probe to be measured is placed in the V-shaped groove and is pressed through the pressing structure, and coupling water is filled in the water containing box assembly.
The pressing structure comprises a probe pressing plate arranged at the lower end of the measurement installation seat and two spring pin shafts arranged on the probe pressing plate, a probe pressing plate spring is arranged on the spring pin shafts, a spring pressing plate is arranged at the end part of the spring pin shaft, and the spring pressing plate presses the probe pressing plate spring.
The water containing box assembly comprises a water containing box cavity and a telescopic movable sliding table supporting rod arranged on the water containing box cavity, wherein a movable sliding table mounting seat is arranged on the movable sliding table supporting rod, and a calibration probe and a calibration tube with equal heights are arranged at the bottom of the water containing box cavity.
The bottom of the cavity of the water box is provided with a probe mounting seat, and the probe mounting seat is provided with a calibration probe.
The lower ends of two opposite side walls of the cavity of the water containing box are respectively provided with a calibration pipe mounting seat, and a calibration pipe is arranged between the two calibration pipe mounting seats.
The calibration tube mounting seat is provided with a sealing structure.
The six-degree-of-freedom precise moving sliding table comprises two horizontal moving sliding tables and a vertical lifting sliding table, wherein the horizontal moving sliding tables and the vertical lifting sliding tables are distributed horizontally and at right angles.
The invention has the following remarkable effects:
the parameter measuring device of the water immersion focusing ultrasonic probe can realize the precise measurement of parameters such as the angle of the probe sound beam, the focal length, the focal spot, the focal column and the like. Parameters such as a probe focal length, a focal spot, a focal column and the like are obtained by measuring the probe head fillet sound beam echo, and a probe sound beam angle is obtained by measuring the sound beam echo of the outer wall of the thin-wall calibration tube.
The six-degree-of-freedom precise moving sliding table is used for realizing the movement of the detected probe relative to the calibration probe in the horizontal two orthogonal directions and the vertical directions, and the ultrasonic instrument is used for displaying the echo signal of the head of the calibration probe, so that the focal length, focal spot and focal column values of the detected probe are obtained;
after the six-degree-of-freedom precise moving sliding table is adjusted to a proper position, the sound beam of the detected probe circumferentially rotates around the calibration tube through the angle swing adjusting knob, and an echo signal of the axial nick of the calibration tube is displayed through the ultrasonic instrument, so that the sound beam angle value of the detected probe is obtained.
Drawings
FIG. 1 is a schematic diagram of a precise parameter measuring device of a water immersion focusing ultrasonic probe;
FIG. 2a is a schematic view of the water container assembly;
FIG. 2b is a schematic view of a water containing cartridge assembly;
FIG. 3 is a schematic diagram of a six degree-of-freedom mobile slipway;
FIG. 4 is a schematic diagram of a focus parameter measurement tool;
FIG. 5a is a schematic view of an angle measurement tool;
FIG. 5b is a diagram of an angle measurement tool pointer;
in the figure: 1. a water containing box assembly; 2. six-degree-of-freedom precise moving sliding table; 3. a parameter measurement component; 4. a water box cavity; 5. moving the sliding table supporting rod; 6. moving the slipway mounting seat; 7. a probe mounting seat; 8. calibrating a tube mounting seat; 9. calibrating the probe; 10. calibrating a tube; 11. horizontally moving the sliding table; 12. a vertical lifting sliding table; 13. a mounting base; 14. a probe pressing plate; 15. a spring pin; 16. a spring pressing plate; 17. a probe platen spring; 18. an angle measurement mounting seat; 19. the mandrel swings angularly; 20. a probe mounting seat; 21. an angle swinging torsion spring; 22. an angle swing scale plate; 23. an angle swing pointer; 24. an angle swing adjustment knob; 25. and a probe to be tested.
Detailed Description
The invention is further illustrated by the following figures and detailed description.
As shown in fig. 1, the probe parameter measuring device mainly comprises a water box assembly 1, a six-degree-of-freedom precision moving sliding table 2 and a parameter measuring assembly 3.
As shown in fig. 2a and 2b, the water containing cartridge assembly 1 includes a water containing cartridge cavity 4, which is a rectangular parallelepiped structure lacking an upper surface or a circular cavity structure, on several corners of an upper end face of which movable slide table support rods 5 are respectively installed (when it is a rectangular parallelepiped structure, three corners of four corners of the upper end face of which are respectively installed with movable slide table support rods 5), on the movable slide table support rods 5, movable slide table mounting seats 6 are installed, and the movable slide table mounting seats 6 are used for installing precise movable slide tables.
The water box cavity is formed by adopting an integral machine or welding processing, is used for providing a couplant water storage space during measurement of the water immersion ultrasonic probe, and simultaneously provides an installation position for the six-degree-of-freedom precision moving sliding table and the probe measurement target.
A probe mounting seat 7 is arranged at the bottom of the water box cavity 4, and a calibration probe 9 is arranged on the probe mounting seat 7. The calibration pipe installation seats 8 are respectively installed at the lower ends of the two opposite side walls of the water containing box cavity 4, the calibration pipe installation seats 8 are used for installing the calibration pipe 10, the calibration pipe 10 penetrates through the water containing box cavity 4, and the calibration pipe installation seats 8 are provided with sealing structures to prevent the coupling water in the water containing box cavity 4 from leaking.
The calibration probe 9 is used as a target for measuring parameters of the water immersion focusing ultrasonic probe, the top of the calibration probe is a round angle, and the radius of the round angle is adjusted according to the focal spot diameter and focal column length of the ultrasonic probe. The calibration tube 10 is a cylindrical thin-wall hollow tube as a target for measuring the angle deviation of the water immersion focusing ultrasonic probe, and the outer wall is carved with an artificial defect along the axial direction.
The height of the calibration probe 9 is the same as the height of the calibration tube 10 based on the bottom of the water box cavity 4.
The length of the movable slipway supporting rod 5 can be changed up and down, and the movable slipway mounting seat 6 is lifted to a proper height. At this time, the distance between the water immersed ultrasonic probe and the calibration tube is the rated focal length of the probe.
As shown in fig. 3, the six-degree-of-freedom precise moving sliding table 2 is installed below the moving sliding table installation seat 6, and is formed by splicing two horizontally and right-angle distributed horizontally moving sliding tables 11 and one vertically lifting sliding table 12, so that two orthogonal horizontal axis translation and vertical lifting of the parameter measuring assembly can be realized, and in order to ensure moving precision, three moving sliding tables are fed through a screw rod, and precise adjustment of positions in six directions is realized by adopting a micrometer knob. The six-degree-of-freedom precise moving sliding table belongs to the existing mature technology and is not described in detail here.
The parameter measuring component 3 is composed of two kinds of focusing parameter measuring tools and angle measuring tools, wherein the focusing parameter measuring tools are used for measuring parameters such as focal length, focal spot, focal column and the like of the water immersion focusing ultrasonic probe, and the angle measuring tools are used for measuring angle deviation of the ultrasonic probe.
As shown in fig. 4, the focusing parameter measuring tool is composed of a measuring mounting seat 13, a probe pressing plate 14, a spring pin shaft 15, a spring pressing plate 16 and a probe pressing plate spring 17.
The measuring mounting seat 13 connects the focusing parameter measuring tool with the six-degree-of-freedom precision moving sliding table, and the upper plane of the measuring tool is attached to the lower surface of the lifting sliding table 12 and is connected with the lower surface of the lifting sliding table through screws.
The probe pressing plate 14 presses the ultrasonic probe 25 to be detected at the lower end of the measurement mounting seat 13, and is of a flat plate structure, and through holes are formed in two sides of the probe pressing plate through the spring pin shafts 15. In order to maintain the continuous pressing force of the probe pressing plate 14 on the detected probe, a probe pressing plate spring 17 and a spring pin shaft 15 are adopted, the probe pressing plate spring 17 is sleeved on the spring pin shaft 15, the spring pin shaft 15 is fixed at the lower end of the measurement mounting seat 13 through threaded connection, and the spring pressing plate 16 abuts against the probe pressing plate spring at the other end of the probe pressing plate spring 17.
As shown in fig. 5a and 5b, the angle measuring tool is composed of an angle measuring mount 18, an angle swinging mandrel 19, a probe mount 20, an angle swinging torsion spring 21, an angle swinging scale plate 22, an angle swinging pointer 23 and an angle swinging adjusting knob 24.
The angle measurement mounting seat 18 is arranged on the vertical lifting sliding table 12, and the upper surface of the angle measurement mounting seat is attached to the vertical lifting sliding table 12; the probe is of an L-shaped plate structure, a central hole is machined at the lower end of a vertical plate surface, the hole is connected with an angle swing mandrel 19 through a bearing, the angle swing mandrel 19 extends out of the central hole, one end of the extending plate surface is fixedly provided with an angle swing scale plate 22 and an angle swing pointer 23, the angle swing scale plate 22 is fixed relative to the vertical plate surface of the angle measurement mounting seat 18, an angle swing torsion spring 21 and a probe mounting seat 20 are sequentially arranged on the angle swing mandrel 19 at the other end of the plate surface, a probe to be tested is arranged on the probe mounting seat 20, a probe pressing plate 14, a spring pin shaft 15, a spring pressing plate 16 and a probe pressing plate spring 17 are arranged at the lower end of the probe mounting seat 20, and the mounting structure of the probe pressing plate is consistent with the corresponding structure in the focusing parameter measurement tool and is used for pressing a detected probe 25 in the probe mounting seat and can be replaced quickly.
The angular oscillation mandrel 19 is able to rotate, thus bringing both the probe mount 20 and the angular oscillation pointer 23 to oscillate about an axis relative to the angular measurement mount 18.
The angle swinging knob 24 is installed through an installation seat fixedly installed on one side of the angle swinging scale plate 22, and the angle swinging knob 24 enables the angle swinging pointer 23 to be in contact with the angle swinging adjusting knob 24 at any time through pretwisting force.
The angle swing mandrel 19 is an installation frame of the probe installation seat 20 and the angle swing pointer 23, and the swing of the probe installation seat 20 is realized through the angle swing adjusting knob 24, and the angle swing pointer 23 synchronously indicates the swing angle. The angle swinging knob 24 enables the angle swinging pointer 23 to be in contact with the angle swinging adjusting knob 24 at any time through pre-torsion, and the display inconsistency of the angle swinging of the detected probe and the angle swinging pointer is eliminated.
Claims (9)
1. The utility model provides a water logging focus ultrasonic probe parameter precision measurement device, includes flourishing water box subassembly (1), locates six degrees of freedom precision movement slip table (2) and parameter measurement subassembly (3) in flourishing water box subassembly (1), its characterized in that: the parameter measurement assembly (3) comprises a focusing parameter measurement tool and an angle measurement tool, and a calibration probe (9) and a calibration tube (10) with the same height are arranged in the water box assembly (1); the upper end of the water box assembly (1) is provided with a movable sliding table mounting seat (6) with adjustable height, and the lower end of the movable sliding table mounting seat (6) is fixedly provided with a six-degree-of-freedom precise movable sliding table (2); the focusing parameter measuring tool comprises a measuring installation seat (13) and a compression structure arranged at the lower end of the measuring installation seat (13), the measuring installation seat (13) is fixedly connected with the six-degree-of-freedom precise moving sliding table (2), a V-shaped groove is formed in the lower end of the measuring installation seat (13), a probe to be measured is placed in the V-shaped groove and is compressed through the compression structure, and coupling water is filled in the water containing box assembly (1); the angle measuring tool comprises an angle measuring installation seat (18) and an angle swinging mandrel (19) which is arranged at the lower end of the angle measuring installation seat (18) and can rotate, the probe to be measured is installed on the angle swinging mandrel (19) and rotates along with the angle swinging mandrel (19), a swinging scale plate (22) and an angle swinging pointer (23) are installed at one end, extending out of the lower end plate surface of the angle measuring installation seat (18), of the angle swinging mandrel (19), the angle swinging scale plate (22) is fixed relative to the angle measuring installation seat (18), an angle swinging torsion spring (21) and a probe installation seat (20) are sequentially installed at the other end, extending out of the lower end plate surface of the angle measuring installation seat (18), of the probe installation seat (20) is provided with the probe to be measured, the probe installation seat (20) rotates along with the angle swinging mandrel (19), one side of the angle swinging scale plate (22) is provided with an installation seat, an angle swinging knob (24) is installed on the angle swinging scale plate (22) through the installation seat, and the end part of the angle swinging knob (24) is contacted with the angle pointer (23); the calibration probe (9) is used as a target for measuring parameters of the water immersion focusing ultrasonic probe, the top of the probe is a round angle, the radius of the round angle is adjusted according to the focal spot diameter and focal column length of the ultrasonic probe, the calibration tube (10) is used as a target for measuring angle deviation of the water immersion focusing ultrasonic probe, the probe is a cylindrical thin-wall hollow tube, and the outer wall is carved with an artificial defect along the axial direction; the six-degree-of-freedom precise movement sliding table is used for realizing the movement of the probe to be tested in the horizontal two orthogonal directions and the vertical direction relative to the calibration probe (9), and the ultrasonic instrument is used for displaying the echo signals of the head of the calibration probe (9), so that the focal length, focal spot and focal column values of the probe to be tested are obtained; after the six-degree-of-freedom precise moving sliding table is adjusted to a proper position, the sound beam of the probe to be detected is enabled to circumferentially rotate around the calibration tube (10) through the adjusting angle swinging knob (24), echo signals of axial nicks of the calibration tube (10) are displayed through the ultrasonic instrument, and the sound beam angle value of the probe to be detected is obtained.
2. The precise measurement device for parameters of the water immersion focusing ultrasonic probe according to claim 1, wherein: the pressing structure comprises a probe pressing plate (14) arranged at the lower end of the measurement installation seat (13), and two spring pins (15) arranged on the probe pressing plate (14), wherein a probe pressing plate spring (17) is arranged on the spring pins (15), a spring pressing plate (16) is arranged at the end part of the spring pins (15), and the spring pressing plate (16) presses the probe pressing plate spring (17).
3. The precise measurement device for parameters of the water immersion focusing ultrasonic probe according to claim 1, wherein: the water containing box assembly (1) comprises a water containing box cavity (4) and a telescopic movable sliding table supporting rod (5) arranged on the water containing box cavity (4), wherein a movable sliding table mounting seat (6) is arranged on the movable sliding table supporting rod (5), and a calibrating probe (9) and a calibrating tube (10) with equal heights are arranged at the bottom of the water containing box cavity (4).
4. A water immersion focusing ultrasonic probe parameter precision measurement device as claimed in claim 3, wherein: the bottom of the water box cavity (4) is provided with a probe mounting seat (7), and the probe mounting seat (7) is provided with a calibration probe (9).
5. A water immersion focusing ultrasonic probe parameter precision measurement device as claimed in claim 3, wherein: the lower ends of two opposite side walls of the water containing box cavity (4) are respectively provided with a calibration pipe mounting seat (8), and a calibration pipe (10) is arranged between the two calibration pipe mounting seats (8).
6. The precise measurement device for parameters of the water immersion focusing ultrasonic probe according to claim 5, wherein: the calibration tube mounting seat (8) is provided with a sealing structure.
7. The precise measurement device for parameters of the water immersion focusing ultrasonic probe according to claim 1, wherein: the six-degree-of-freedom precise moving sliding table (2) comprises two horizontal moving sliding tables (11) and a vertical lifting sliding table (12), wherein the horizontal moving sliding tables are horizontally and vertically distributed.
8. The precise measurement device for parameters of the water immersion focusing ultrasonic probe according to claim 1, wherein: the probe pressing plate (14) is arranged at the lower end of the probe mounting seat (20), the probe pressing plate (14) presses the detected probe in the probe mounting seat (20), and two sides of the probe pressing plate (14) are through holes through the spring pin shafts (15).
9. The precise measurement device for parameters of the water immersion focusing ultrasonic probe according to claim 8, wherein: the probe pressing plate spring (17) is arranged on the spring pin shaft (15), the spring pressing plate (16) is arranged at the end part of the spring pin shaft (15), and the spring pressing plate (16) presses the probe pressing plate spring (17).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711444905.8A CN109975420B (en) | 2017-12-27 | 2017-12-27 | Water logging focusing ultrasonic probe parameter precision measurement device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711444905.8A CN109975420B (en) | 2017-12-27 | 2017-12-27 | Water logging focusing ultrasonic probe parameter precision measurement device |
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| CN109975420A CN109975420A (en) | 2019-07-05 |
| CN109975420B true CN109975420B (en) | 2023-05-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5426978A (en) * | 1992-10-09 | 1995-06-27 | Mitsubishi Denki Kabushiki Kaisha | Non-destructive axle flaw detecting apparatus |
| CN202710522U (en) * | 2012-06-26 | 2013-01-30 | 国核电站运行服务技术有限公司 | Parameter testing device for immersion focusing detection probe |
| CN103697798A (en) * | 2013-12-30 | 2014-04-02 | 长城汽车股份有限公司 | Measuring device and measuring method for swing angle of ball head |
| CN204630531U (en) * | 2015-02-15 | 2015-09-09 | 宁波明润机械制造有限公司 | Angel measuring instrument |
| CN106018543A (en) * | 2016-05-16 | 2016-10-12 | 北京理工大学 | Bolt connecting part damage in-situ monitoring device based on magnetic memory effect |
| CN107490627A (en) * | 2016-06-12 | 2017-12-19 | 中国航发商用航空发动机有限责任公司 | Focus ultrasonic probe parameter scaling method |
-
2017
- 2017-12-27 CN CN201711444905.8A patent/CN109975420B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5426978A (en) * | 1992-10-09 | 1995-06-27 | Mitsubishi Denki Kabushiki Kaisha | Non-destructive axle flaw detecting apparatus |
| CN202710522U (en) * | 2012-06-26 | 2013-01-30 | 国核电站运行服务技术有限公司 | Parameter testing device for immersion focusing detection probe |
| CN103697798A (en) * | 2013-12-30 | 2014-04-02 | 长城汽车股份有限公司 | Measuring device and measuring method for swing angle of ball head |
| CN204630531U (en) * | 2015-02-15 | 2015-09-09 | 宁波明润机械制造有限公司 | Angel measuring instrument |
| CN106018543A (en) * | 2016-05-16 | 2016-10-12 | 北京理工大学 | Bolt connecting part damage in-situ monitoring device based on magnetic memory effect |
| CN107490627A (en) * | 2016-06-12 | 2017-12-19 | 中国航发商用航空发动机有限责任公司 | Focus ultrasonic probe parameter scaling method |
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