CN106563877A - Connecting method for vibration wire in vibration wire type earth pressure gauge - Google Patents
Connecting method for vibration wire in vibration wire type earth pressure gauge Download PDFInfo
- Publication number
- CN106563877A CN106563877A CN201610969405.5A CN201610969405A CN106563877A CN 106563877 A CN106563877 A CN 106563877A CN 201610969405 A CN201610969405 A CN 201610969405A CN 106563877 A CN106563877 A CN 106563877A
- Authority
- CN
- China
- Prior art keywords
- support seat
- vibratory string
- vibration wire
- right support
- pressure gauge
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/24—Preliminary treatment
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/10—Measuring force or stress, in general by measuring variations of frequency of stressed vibrating elements, e.g. of stressed strings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention discloses a connecting method for a vibration wire in a vibration wire type earth pressure gauge. The vibration wire and supporting seats are fixedly connected together in an ultrasonic welding mode, and ultrasonic vibration is applied to the outer surfaces of clamping plates of the supporting seats through an ultrasonic welding device, so that the vibration wire located in the clamping plates of the supporting seats and the clamping plates are welded firmly together. The connecting method for the vibration wire in the vibration wire type earth pressure gauge has the following beneficial effects that (1) the process is simple and easy to operate, the vibration wire is not loose after being connected, and the purpose that the tensioned vibration wire and the clamping plates of the supporting seats are permanently combined is realized; and (2) threaded holes do not need to be machined in the clamping plates of the supporting seats, the problem that the vibration wire is prone to be loose is solved, the service life is long, the stability is good, and the measurement data of the vibration wire type earth pressure gauge are accurate and consistent.
Description
Technical field
The invention belongs to civil engineering field of test instrument, is related to type vibration wire earth pressure gauge field, and in particular to be one
Plant the improvement of the method for attachment of vibratory string in type vibration wire earth pressure gauge.
Background technology
Type vibration wire earth pressure gauge is measurement earth and rockfill dam, breakwater, skyscraper, bridge pier, retaining wall, tunnel, subway, highway
The building foundations such as structure and effective monitoring device of the compressive stress of the soil body, simultaneously can be used for understanding soil pressure inside tested works
The temperature of power variable quantity, embedded point.
Existing type vibration wire earth pressure gauge is generally by backboard 1 ', tablet 2 ', signal-transmitting cable 3 ', vibratory string 4 ', support
Seat 5 ' and solenoid 6 ' etc. composition, as shown in Figure 1.Wherein tablet 2 ' threadably connects with backboard 1 ', tablet 2 '
The rubber washer 7 ' of a diameter of 2mm is lined between backboard 1 ', the operation principle of type vibration wire earth pressure gauge is when tested works
When interior soil stress changes, 2 ' the synchronous change for experiencing stress of tablet, tablet 2 ' will be deformed, and displacement transfer is given
Vibratory string 4 ' is transformed into the change of vibratory string stress, and so as to change the frequency of vibration of vibratory string 4 ', 6 ' exciting vibratory string 4 ' of solenoid is simultaneously surveyed
Its frequency of vibration is measured, frequency signal Jing signal-transmitting cables 3 ' are transmitted to reading plotter, you can the pressure for measuring tested works should
Force value, and can synchronously measure the temperature value of embedded point.At present type vibration wire earth pressure gauge be widely used in water conservancy and hydropower, road and rail,
Bridge tunnel, mine, national defence and Construction Safety monitor the physical quantity in field.
The vibratory string of existing type vibration wire earth pressure gauge fastens the mechanical connection manner of vibratory string, concrete connected mode using screw
It is as follows：Process the screwed hole being of moderate size first on the clamping plate of the support base 5 ' of clamping vibratory string 4 ', then by soket head cap screw
8 ' screw in screwed hole, the clamping plate of support base 5 ' is produced clamping force and is pressed from both sides the vibratory string 4 ' of tensioning by screwing soket head cap screw 8 '
Gu, but such clamping mode forever can not be consolidated.
Type vibration wire earth pressure gauge is chronically in the dynamic duty environment of complexity, current type vibration wire earth pressure gauge vibratory string
Connected mode can cause problems with occur：(1) due to using screw fastening means, with lengthening and the vibratory string of use time
Vibration, vibratory string occur easily loosening, and tension force is reduced, situations such as amplitude reduces；(2) loosening vibrated can cause sensor to be changed
There is larger error in data, it is impossible to the actual measured value of reflection, it is impossible to meet the demand of measuring instrument high accuracy result；(3) exist
On the clamping plate of the support base of vibratory string, thread mill drilling can reduce its working strength.
Ultrasonic bonding is mechanical vibrational energy (more than 16kHz) the connection same metal or xenogenesis gold using supersonic frequency
A kind of specific process of category, metal neither convey electric current to workpiece, also do not impose high temperature to workpiece when ultrasonic bonding is carried out
Vibrational energy, simply under static pressure, is changed into the frictional work between workpiece, deformation energy and limited temperature rise by thermal source.Some
Metallurgical binding between metal joint is a kind of solid State Welding realized in the case that mother metal does not occur to melt.Therefore ultrasonic bonding
Both splashing produced during resistance welding and oxidative phenomena had been effectively overcomed, electric arc welding heat had also been compensate for too high, molten
Fracture of wire string cannot form the shortcoming of effective joint.
The content of the invention
It is an object of the invention to provide in a kind of type vibration wire earth pressure gauge vibratory string method of attachment, the method for attachment technique
Simply, it is easy to operate, after the completion of connection, vibratory string does not loosen, and is achieved the permanent bond of vibratory string and support base, overcomes and shake
The problem that string easily loosens, long service life, good stability so that the measurement data of type vibration wire earth pressure gauge is accurate.
In order to reach above-mentioned purpose, the solution of the present invention is：
The method of attachment of vibratory string in a kind of type vibration wire earth pressure gauge, the support base reality that the method for attachment is fixed based on vibratory string
Existing, the support base includes the left support seat and right support seat of aluminum, the upper end of the left support seat and the right support seat
The clamping plate that upper end is oppositely arranged with two panels respectively, forms the crack passed through for vibratory string between the clamping blocks, at described left
Length direction in support seat along the left support seat opens up a through hole, or along the right support seat in the right support seat
Length direction opens up a through hole；
The method of attachment is comprised the following steps：
(1) pretreatment of vibratory string：Between length, two support bases according to the left support seat and the right support seat away from
From, corresponding length of the vibratory string in the crack is obtained, the vibratory string part being pointed in the crack sprays one layer of aluminium film；
(2) fixation of vibratory string：The through hole in through hole or the right support seat by vibratory string from the left support seat is worn
Later, then reversely penetrate between the crack of corresponding support base, one end of vibratory string is fixed outside through hole, and the other end of vibratory string passes through
Roller strainer is tensed, and keeps vibratory string and plane-parallel；
(3) determination of pad：Pad is located on the outer surface of the clamping plate of the left support seat and the right support
On the outer surface of the clamping plate of seat, the center of the pad on the left support seat is 10- with the spacing of the left hand edge of left support seat
15mm and be 5-10mm with the spacing of the top edge of left support seat, center and the right support seat of the pad on the right support seat
The spacing of right hand edge be 10-15mm and be 5-10mm with the spacing of the top edge of right support seat；
(4) ultrasonic bonding：First the left support seat or the right support seat that offer the through hole are positioned over
Between two applicators of ultrasonic brazing unit, each applicator is respectively aligned to into the pad of corresponding support base, to the left side
Support base or the right support seat apply ultrasonic activation, natural cooling so that positioned at the left support seat or right support
Vibratory string between the clamping plate of seat is integrally welded with clamping plate, then welds the vibratory string of another support base, finally cuts off positioned at described
The outer unnecessary vibratory string of support seat, just completes the connection between vibratory string and the support base.
The distance between described clamping plate is 0.25mm, a diameter of 0.25mm of the through hole.
In step (4), welding pressure is 14-18Mpa, and bonding power is 4000-4500W, and weld amplitude is 18-20 μm,
Weld interval is 1-1.5s.
In step (4), while welding, argon or nitrogen are passed through to pad.
The method of attachment of vibratory string in a kind of type vibration wire earth pressure gauge of the present invention, by the way of ultrasonic bonding by vibratory string with
Support base is fixed together, and has the advantages that：
(1) process is simple, it is easy to operate, after the completion of connection, vibratory string does not loosen, and reaches the vibratory string of tensioning and the folder of support base
Plate reaches the purpose of permanent bond；
(2) without the need for the thread mill drilling on the clamping plate of support base, overcome the problem that vibratory string easily loosens, long service life,
Good stability so that the measurement data of type vibration wire earth pressure gauge is accurate.
Further, the weld amplitude of welding process determined by the thickness and material of weldment, with material hardness and thickness
Improve, the amplitude of selection accordingly increases, Application Range is 18～20 μm；In order to prevent excessive pressure from making, frictional force is excessive to be caused
Between weldment, relative motion weakens, and welding pressure is advisable with 14Mpa, weld interval refer to ultrasonic energy input weldment when
Between, the formation of solder joint has a minimum weld interval, be not enough to destroy metal oxide film surface less than the weld interval and cannot
Welding, for the weld interval of metal thick plate is usually no more than 1.5s, therefore weld interval is advisable with 1-1.5s.
Further, during welding, in order to prevent the surface of the support base of aluminum from causing oxidation due to the temperature rise that friction is produced, can
It is passed through argon or helium is protected.
Description of the drawings
Fig. 1 is the connection diagram of vibratory string in existing type vibration wire earth pressure gauge；
Fig. 2 is the positive structure schematic of left support seat in the present invention；
Fig. 3 is the side structure schematic view of left support seat in the present invention；
Fig. 4 is the side structure schematic view of right support seat in the present invention；
Fig. 5 is the schematic diagram of the pretreatment of vibratory string in the present invention；
Fig. 6 is the structural representation that support base is connected with vibratory string in the present invention；
Fig. 7 is the schematic diagram of left support seat and vibratory string welding in the present invention；
Fig. 8 is the schematic diagram of right support seat and vibratory string welding in the present invention；
Fig. 9 is the schematic diagram for completing in the present invention to weld between support base and vibratory string.
In figure：
1 ' tablet 2 ' of backboard
3 ' vibratory string 4 ' of signal-transmitting cable
5 ' solenoid 6 ' of support base
7 ' soket head cap screw 8 ' of rubber washer
1 clamping plate 11 of left support seat
12 through hole 13 of crack
2 clamping plate 21 of right support seat
22 vibratory string 3 of crack
4 roller strainer 5 of locating wheel
6 applicator 61 of ultrasonic brazing unit
611 hemispherical end face 612 of applicator body
Specific embodiment
In order to technical scheme is explained further, the present invention is explained in detail below by specific embodiment
State.
The method of attachment of vibratory string in a kind of type vibration wire earth pressure gauge, the support base reality that the method for attachment is fixed based on vibratory string
Existing, the method for attachment is comprised the following steps：
(1) processing of support base train wheel bridge：As shown in figs 2-4, the material of support base be LY12 aluminium alloys, support base bag
Include left support seat 1 and right support seat 2, what the upper end of left support seat 1 and the upper end of right support seat 2 were oppositely arranged with two panels respectively
Clamping plate, the processing between the clamping plate 11 of left support seat 1 form the crack 12 that passes through for vibratory string, right support seat 2 clamping plate 21 it
Between also processing form the crack 22 that passes through for vibratory string, the width b of crack 12 and 22 is 0.25mm, takes negative common difference -0.1mm (i.e. same
Spacing on one support base between two panels clamping plate is 0.25mm), open up in the 1 interior length direction along left support seat 1 of left support seat
One through hole 13, the diameter D of through hole 13 is 0.25mm.
(2) pretreatment of vibratory string：As shown in Figure 3-Figure 5, according to left support seat 1 and right support seat 2 length d, two supports
The distance between seat 1, obtains corresponding length of the vibratory string 3 in crack 12 and 22, the vibratory string portion being pointed in crack 12 and 22
Divide spraying one layer of aluminium film.
(3) fixation of vibratory string：As shown in Fig. 3, Fig. 4 and Fig. 6, by the first end of vibratory string 3 by the right-hand member of left support seat 1 from logical
After hole 13 passes through, then the crack 22 for reversely penetrating the crack 12 of left support seat 1, right support seat 2 from the left end of left support seat 1 successively
Interior, the second end of vibratory string 3 is fixed outside the through hole 13 of left support seat 1 by locating wheel 4, and the first end of vibratory string 3 is by roller
Tight mechanism 5 tenses, and keeps vibratory string 3 and plane-parallel.
(4) determination of pad：As shown in fig. 6, pad be located at left support seat 1 two panels clamping plate 11 outer surface on
And on the outer surface of the two panels clamping plate 21 of right support seat 2, the center of the pad on left support seat 1 and the left side of left support seat 1
The interval S 1 of edge is 10-15mm and is 5-10mm with the interval S 2 of the top edge of left support seat 1, the pad on right support seat 2
The interval S 3 of right hand edge of center and right support seat 2 be 10-15mm and be 5- with the interval S 4 of the top edge of right support seat
10mm。
(5) ultrasonic bonding：As shown in Fig. 3, Fig. 7-Fig. 9, the left support seat 1 for offering through hole 13 is positioned over into ultrasound first
Between two applicators 61 of wave soldering connection device 6, each applicator 61 is respectively aligned to into the pad on the clamping plate 11 of left support seat 1,
The clamping plate 11 of support base 1 applies ultrasonic activation to the left, and welding pressure is 14Mpa, and bonding power is 4000W, and weld amplitude is
18-20 μm, stop ultrasonic activation, natural cooling after welding 1-1.5s so that the vibratory string positioned between the clamping plate 11 of left support seat 1
3 is integrally welded with clamping plate 11, then with the vibratory string 3 in same method welding right support seat 2, finally apart from right support seat 2
Cut off at outer 5mm positioned at 2 outer unnecessary vibratory string 3 of right support seat, just complete the connection between vibratory string 3 and support base.
The method of attachment of vibratory string in a kind of type vibration wire earth pressure gauge of the present invention, by the way of ultrasonic bonding by vibratory string with
Support base is fixed together, and has the advantages that：
(1) process is simple, it is easy to operate, after the completion of connection, vibratory string does not loosen, and reaches the vibratory string of tensioning and the folder of support base
Plate reaches the purpose of permanent bond；
(2) without the need for the thread mill drilling on the clamping plate of support base, overcome the problem that vibratory string easily loosens, long service life,
Good stability so that the measurement data of type vibration wire earth pressure gauge is accurate.
Further, as vibratory string 3 is steel wire string, and support base is made by aluminium alloy, the vibratory string being pointed in crack
Part sprays one layer of aluminium film, it is therefore an objective to as same metal is consistent to the amplitude of ultrasonic sensing, can make after ultrasonic bonding
The vibratory string that must be located in crack preferably can be welded together with the clamping plate of support base.
Further, in step (3), vibratory string tension force (tensioning degree) is adjusted by roller strainer 5 so that vibratory string 3
Tensioning degree meets the requirement standard of type vibration wire earth pressure gauge.
Further, the weld amplitude of welding process determined by the thickness and material of weldment, with material hardness and thickness
Improve, the amplitude of selection accordingly increases, Application Range is 18-20 μm；In order to prevent excessive pressure from making, frictional force is excessive to be caused
Between weldment, relative motion weakens, and welding pressure is advisable with 14Mpa, weld interval refer to ultrasonic energy input weldment when
Between, the formation of solder joint has a minimum weld interval, be not enough to destroy metal oxide film surface less than the weld interval and cannot
Welding, for the weld interval of metal thick plate is usually no more than 1.5s, therefore weld interval is advisable with 1-1.5s.
Further, as shown in fig. 7, the hemispherical end face that includes applicator body 611 and contact with pad of applicator 61
612, applicator body 611 is made using high-speed steel, and hemispherical end face 612 is made using beating steel GCr15, hemispherical
The radius of end face 612 is 25mm, and during welding, the center of hemispherical end face 612 is aligned with the center of pad, so as to ensure weldering
Connect effect.
Further, during welding, in order to prevent the surface of the support base of aluminum from causing oxidation due to the temperature rise that friction is produced, can
Argon is passed through at pad or helium is protected.
Roller strainer 5, ultrasonic brazing unit 6 in the present invention is the known device of this area.
The product form and style of above-described embodiment and schema the non-limiting present invention, any art it is common
Appropriate change or modification that technical staff is done to which, all should be regarded as the patent category without departing from the present invention.
Claims (4)
1. in a kind of type vibration wire earth pressure gauge vibratory string method of attachment, the support base reality that the method for attachment is fixed based on vibratory string
Existing, the support base includes the left support seat and right support seat of aluminum, the upper end of the left support seat and the right support seat
The clamping plate that upper end is oppositely arranged with two panels respectively, forms the crack passed through for vibratory string between the clamping blocks, at described left
Length direction in support seat along the left support seat opens up a through hole, or along the right support seat in the right support seat
Length direction opens up a through hole；
The method of attachment is comprised the following steps：
(1) pretreatment of vibratory string：The distance between length, two support bases according to the left support seat and the right support seat,
Corresponding length of the vibratory string in the crack is obtained, the vibratory string part being pointed in the crack sprays one layer of aluminium film；
(2) fixation of vibratory string：After the through hole in through hole or the right support seat by vibratory string from the left support seat is passed through,
Reversely penetrated between the crack of corresponding support base again, one end of vibratory string is fixed outside through hole, and the other end of vibratory string passes through roller
Strainer is tensed, and keeps vibratory string and plane-parallel；
(3) determination of pad：Pad is located on the outer surface of the clamping plate of the left support seat and the right support seat
On the outer surface of clamping plate, the center of the pad on the left support seat is 10-15mm with the spacing of the left hand edge of left support seat
And be 5-10mm, the center of the pad on the right support seat and the right side of right support seat with the spacing of the top edge of left support seat
The spacing at edge is 5-10mm for 10-15mm and with the spacing of the top edge of right support seat；
(4) ultrasonic bonding：The left support seat or the right support seat that offer the through hole are positioned over into ultrasound first
Between two applicators of wave soldering connection device, each applicator is respectively aligned to into the pad of corresponding support base, to the left support
Seat or the right support seat apply ultrasonic activation, natural cooling so that positioned at the left support seat or right support seat
Vibratory string between clamping plate is integrally welded with clamping plate, then welds the vibratory string of another support base, finally cuts off positioned at the support base
Outer unnecessary vibratory string, just completes the connection between vibratory string and the support base.
2. in a kind of type vibration wire earth pressure gauge according to claim 1 vibratory string method of attachment, it is characterised in that：The folder
The distance between plate is 0.25mm, a diameter of 0.25mm of the through hole.
3. in a kind of type vibration wire earth pressure gauge according to claim 1 vibratory string method of attachment, it is characterised in that：Step
(4), in, welding pressure is 14-18Mpa, and bonding power is 4000-4500W, and weld amplitude is 18-20 μm, and weld interval is 1-
1.5s。
4. in a kind of type vibration wire earth pressure gauge according to claim 1 vibratory string method of attachment, it is characterised in that：Step
(4), in, while welding, argon or nitrogen are passed through to pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610969405.5A CN106563877B (en) | 2016-10-27 | 2016-10-27 | The connection method of vibratory string in a kind of type vibration wire earth pressure gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610969405.5A CN106563877B (en) | 2016-10-27 | 2016-10-27 | The connection method of vibratory string in a kind of type vibration wire earth pressure gauge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106563877A true CN106563877A (en) | 2017-04-19 |
| CN106563877B CN106563877B (en) | 2018-10-16 |
Family
ID=58541453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610969405.5A Active CN106563877B (en) | 2016-10-27 | 2016-10-27 | The connection method of vibratory string in a kind of type vibration wire earth pressure gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106563877B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112414603A (en) * | 2020-12-01 | 2021-02-26 | 交通运输部公路科学研究所 | Fixed concrete structure stress test system and use method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3430331A (en) * | 1963-09-30 | 1969-03-04 | Philips Corp | Apparatus and process for ultrasonically welding a wire to the surface of an object |
| CN1038352A (en) * | 1988-06-07 | 1989-12-27 | 三菱化成株式会社 | Zooming and capturing system with lighting light guide device |
| US5277356A (en) * | 1992-06-17 | 1994-01-11 | Rohm Co., Ltd. | Wire bonding method |
| US5603445A (en) * | 1994-02-24 | 1997-02-18 | Hill; William H. | Ultrasonic wire bonder and transducer improvements |
| CN202420727U (en) * | 2011-12-26 | 2012-09-05 | 杨波 | Long-acting clamping mechanism of vibrating-string type sensor string wire |
| CN205437480U (en) * | 2016-02-19 | 2016-08-10 | 广州市新栋力超声电子设备有限公司 | Ultrasonic wave pencil welding machine |
| CN205538037U (en) * | 2016-01-27 | 2016-08-31 | 王建美 | Vibrating wire type taseometer |
-
2016
- 2016-10-27 CN CN201610969405.5A patent/CN106563877B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3430331A (en) * | 1963-09-30 | 1969-03-04 | Philips Corp | Apparatus and process for ultrasonically welding a wire to the surface of an object |
| CN1038352A (en) * | 1988-06-07 | 1989-12-27 | 三菱化成株式会社 | Zooming and capturing system with lighting light guide device |
| US5277356A (en) * | 1992-06-17 | 1994-01-11 | Rohm Co., Ltd. | Wire bonding method |
| US5603445A (en) * | 1994-02-24 | 1997-02-18 | Hill; William H. | Ultrasonic wire bonder and transducer improvements |
| CN202420727U (en) * | 2011-12-26 | 2012-09-05 | 杨波 | Long-acting clamping mechanism of vibrating-string type sensor string wire |
| CN205538037U (en) * | 2016-01-27 | 2016-08-31 | 王建美 | Vibrating wire type taseometer |
| CN205437480U (en) * | 2016-02-19 | 2016-08-10 | 广州市新栋力超声电子设备有限公司 | Ultrasonic wave pencil welding machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112414603A (en) * | 2020-12-01 | 2021-02-26 | 交通运输部公路科学研究所 | Fixed concrete structure stress test system and use method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106563877B (en) | 2018-10-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5374179B2 (en) | Fastener with welded ultrasonic stress transducer | |
| Adams et al. | A critical assessment of the block impact test for measuring the impact strength of adhesive bonds | |
| US3794236A (en) | Monitoring and control means for evaluating the performance of vibratory-type devices | |
| JP4311582B1 (en) | Resonator support device | |
| JP6223535B2 (en) | Ultrasonic welding quality judgment device and method | |
| US20070214892A1 (en) | System and methods to determine and monitor changes in rail conditions over time | |
| CN106563877B (en) | The connection method of vibratory string in a kind of type vibration wire earth pressure gauge | |
| CN205080084U (en) | A sensor for $monitoring crackle speed | |
| CN101239432A (en) | Crack arrest method of alloy surface fine crack crack arrest method and device thereof | |
| CN106197342A (en) | Fracture width change dynamic monitor based on strain sensing | |
| JP3772175B2 (en) | Ultrasonic welding equipment | |
| CN208019614U (en) | A kind of ultrasonic vibration auxiliary soldering test device | |
| Paradowska et al. | The effect of heat input on residual stress distribution of steel welds measured by neutron diffraction | |
| Objois et al. | Theoretical and experimental analysis of the scarf joint bonded structure: Influence of the adhesive thickness on the micro-mechanical behavior | |
| CN106441651A (en) | Measuring device for pressure of railway vehicle | |
| JP2019188405A (en) | Ultrasonic jointing device | |
| CN205228788U (en) | Test of laser focus and laser energy evaluation device | |
| Larson | Bibliography on resistance welding 1950–1971 | |
| JP6231894B2 (en) | Inspection method and apparatus for spot welding | |
| LI et al. | The reflection and transmission of Lamb waves at overlap joints | |
| JP2006053095A (en) | Method of measuring opening variation amount of surface crack in structure, method of measuring surface crack depth, and database used therefor | |
| Xu et al. | Effects of vibratory weld conditioning on residual stresses and transverse contraction distortions in multipass welding | |
| CN105758725B (en) | The measuring device and measuring method of weld strength | |
| Beaty | Experimental testing procedures to investigate and improve insulated rail joint design and life cycle | |
| Okamura et al. | Ultrasonic joining of Si3N4 plates at 19 kHz using Al, Cu and Ni plates as insert metal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |