CN108169325B - A kind of mounting and positioning device and method of side-mounted flexure element - Google Patents
A kind of mounting and positioning device and method of side-mounted flexure element Download PDFInfo
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- CN108169325B CN108169325B CN201711267816.0A CN201711267816A CN108169325B CN 108169325 B CN108169325 B CN 108169325B CN 201711267816 A CN201711267816 A CN 201711267816A CN 108169325 B CN108169325 B CN 108169325B
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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
- G01N29/04—Analysing solids
- G01N29/043—Analysing solids in the interior, e.g. by shear waves
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Abstract
The present invention provides the mounting and positioning device and method of a kind of side-mounted flexure element, and device includes pressure cap (1), pedestal (2), rubber membrane (3), sample (4), chucking lug (5), flexure element (7), positioning base (8), locating support (12)；The locating support (12) is installed on positioning base (8), sample (4) is set in locating support (12) and positioning base (8), sample (4) center line is kept to be overlapped with positioning base (8) center line, and sample (4) bottom mounting seat (2), pressure cap (1) is installed at the top of sample (4), it is wrapped up outside sample (4) using rubber membrane (3), the top of rubber membrane (3) is fixed on the outer of pressure cap (1), and rubber membrane (3) lower part is fixed on the outer of pedestal (2).The present invention overcomes existing side-mounted flexure element installation positioning is coarse, often with the status of installation is visually observed, to realize that the accurate installation when experiment of side-mounted flexure element positions.
Description
Technical field
The invention belongs to the mounting and positioning device and method of a kind of geotechnical engineering testing element, more particularly to one kind are side-mounted
The mounting and positioning device and method of flexure element.
Background technique
In geomaterial test, the shear wave velocity and compression velocity of wave of Chang Liyong flexure element test material.Journal " one
Plant the exploitation of piezoelectric ceramic bending element shear wave speed test device " it is middle to record, in test process, since material and geometry damp shadow
The amplitude (strain) of sound shearing wave is not constant along the direction of propagation, greatest around to emit flexure element, and shearing strain is estimated 10-3% or so, other positions shearing strain are then smaller.What flexure element method was tested is the maximum shear modulus of soil sample.
It follows that using flexure element potsherd test when, the polar orientation of chip is extremely important, receive signal and
When transmitting signal phase is consistent, the signal post-processing received will be made more intuitive and simple, surveyed velocity of wave is rationally accurate.Cause
This, side-mounted flexure element installation when, need to ensure that the potsherd of two flexure elements is located in approximately the same plane, and need to guarantee two it is curved
The bent member line of centres crosses the sample center of circle.And the installation of existing side-mounted flexure element is often installed with naked-eye observation, be there is no and is accurately pacified
Fill positioning device.
Summary of the invention
It is an object of the invention to solve the problems of the above-mentioned prior art, a kind of installation of side-mounted flexure element is provided
Positioning device and method can overcome existing side-mounted flexure element installation positioning coarse, the status often installed with naked-eye observation, from
And realize the precise positioning when experiment of side-mounted flexure element.
The present invention adopts the following technical scheme:
A kind of mounting and positioning device of side-mounted flexure element, including chucking lug 5, positioning base 8, graduated scale 9, telescopic rod
10, adjusting nut 11, locating support 12；
The chucking lug 5 is the otic placode of a upper side opening, and otic placode internal diameter is slightly smaller than 7 outer diameter of flexure element, upper opening
In order to which in flexure element 7 smoothly insertion chucking lug 5, chucking lug 5 is welded on 12 both ends of locating support, 5 center of circle of chucking lug and positioning
Telescopic rod 10 on pedestal 8 is corresponding.
Positioning base 8 is made of two annulus and four vertical solid round rod, and vertical solid round rod upper diameter is slightly less than
Lower diameter can be inserted into the Hollow circular beam of locating support 12 in order to top, two vertical circles in four vertical solid round rod
Bar top is telescopic rod 10, is welded on annulus and the position of welding is opposite, and remaining 2 tops are graduated scale 9, are welded on annulus
On, welding position is also opposite.
Graduated scale 9 is graduated vertical solid round rod, graduated scale 9 can accurate measurement and positioning bracket 12 installation it is high
Degree.
The locating support 12 is made of an annulus and four vertical Hollow circular beams, and chucking lug 5 is welded on annulus top,
Graduated scale 9 reads 12 height of locating support, and the 11 stationary positioned bracket 12 of adjusting nut by being mounted on Hollow circular beam side exists
Piezoelectric ceramic piece 6 on flexure element 7 is inserted into sample 4 by the position on telescopic rod, the cut hole on rubber membrane 3.
A kind of mounting and positioning device installation method of side-mounted flexure element:
1. sample 4 is mounted on pedestal 2, rubber membrane 3 is put on to sample 4, the bottom of rubber membrane 3 is covered in the outer of pedestal 2
Side, and tightened with rubber band；
2. installing pressure cap 1 at the top of sample 4, and by 3 sets of the rubber membrane outsides in pressure cap 1, and tightened with rubber band；
3. by 8 sets of positioning base pressure cap 1, sample 4 and pedestal 2, and be located at the center of circle of positioning base 8 in sample 4
On axis；
4. reading the height of locating support 12 using graduated scale 9, sight needs level；Pass through 11 stationary positioned branch of adjusting nut
Position of the frame 12 on telescopic rod 10, need to tighten adjusting nut 11, in order to avoid locating support 12 slides, cause positioning inaccurate；
5. making inserting for the piezoelectric ceramic piece 6 of flexure element 7 on the rubber membrane 3 of package sample 4 using the center of chucking lug 5
Enter position and mark, in the mark aperture of rubber membrane 3, the piezoelectric ceramic piece 6 of flexure element 7 is inserted into sample 4；
6. flexure element 7 is clipped on chucking lug 5, keep the central axes of flexure element 7 horizontal, rotoflector member 7, to ensure two
Polarity is opposite after piezoelectric ceramic piece 6 on a flexure element 7 is inserted into sample.
The present invention overcomes existing side-mounted flexure element installations to position coarse, often to install with naked eyes status, to realize
Accurate installation positioning when the experiment of side-mounted flexure element, eliminates interference of the abnormal factors to signal, so that test reception is believed
Number last handling process it is more intuitive and simple, the reasonability and accuracy of test result effectively improve.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is mounting and positioning device main view of the invention；
Fig. 3 is mounting and positioning device side view of the invention；
Fig. 4 is the main view and cross-sectional view of positioning base structure；
Fig. 5 is main view, side view, the top view of positioning rack structure；
Fig. 6 is the side-mounted flexure element test macro schematic diagram of the present invention；
Piezoelectric ceramic piece polarity is with respect to schematic diagram when Fig. 7 is flexure element test；
Test schematic diagram when Fig. 8 is flexure element accurate positioning of the present invention；
Fig. 9 positions clutter and the incorrect test schematic diagram when there is deviation for background technique flexure element.
In figure: 1- pressure cap, 2- pedestal, 3- rubber membrane, 4- sample, 5- chucking lug, 6- piezoelectric ceramic piece, 7- flexure element, 8-
Positioning base, 9- graduated scale, 10- telescopic rod, 11- adjusting nut, 12- locating support, 13- positioning rule slot, 14- telescopic chute.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the technical solution below in the present invention carries out clear
Chu is fully described by, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in figs. 1-7:
1 embodiment 1 of embodiment is the structure of apparatus of the present invention
A kind of mounting and positioning device of side-mounted flexure element, including pressure cap 1, pedestal 2, rubber membrane 3, sample 4, chucking lug 5,
Flexure element 7, positioning base 8, locating support 12.
The locating support 12 is installed on positioning base 8, and sample 4 is located in locating support 12 and positioning base 8, is protected
It holds 4 central axes of sample to be overlapped with 8 central axes of positioning base, and 4 bottom of sample is mounted on pedestal 2, installs pressure cap at the top of sample 4
1, it is wrapped up using rubber membrane 3 outside sample 4, the top of rubber membrane 3 is fixed on the outer of pressure cap 1, and the lower part of rubber membrane 3 is fixed on
The outer of pedestal 2, the rubber membrane 3 radially symmetrical two side opening install the pressure of flexure element 7 in two symmetrical holes respectively
Electroceramics piece 6, one end of flexure element 7 are respectively equipped with the opposite piezoelectric ceramic piece 6 of polarity.
Center of two piezoelectric ceramic pieces, 6 line by sample is kept, and in the same plane, piezoelectric ceramic piece 6 is affixed on
In sample 4, the one end of flexure element 7 with piezoelectric ceramic piece 6 is inserted into sample 4 and is close to by two side opening of rubber membrane 3；It is fixed
Position ear 5 is the elastic otic placode of upside opening, and flexure element 7 is clipped in the opening of chucking lug 5, and chucking lug 5 is welded in
On locating support 12.
The otic placode internal diameter that chucking lug 5 is open is slightly smaller than 7 outer diameter of flexure element, has certain elasticity, and upper side opening is conducive to curved
Bent member 7 is smoothly clipped in chucking lug 5.
The positioning base 8 is made of 2 equal diameter concentric loops, graduated scale 9, telescopic rod 10, two concentric loops
Between by 4 vertical solid round rod connections, graduated scale 9, telescopic rod 10 are the vertical round bar of variable diameters, and graduated scale 9 is indicates
The vertical round bar of scale, 2 telescopic rods 10 are welded on annulus, and keeping the angle between two telescopic rods 10 is 180 °, 2 quarters
Degree ruler 9 is welded on the annulus of installation 10 ipsilateral of telescopic rod, and keeping the angle between two graduated scales 9 is 180 °, and makes to appoint
The angle anticipated between graduated scale 9 and telescopic rod 10 is 90 °.
The locating support 12 is made of an annulus and 4 Hollow circular beams, and Hollow circular beam is welded on annulus, is kept
Angle between any two Hollow circular beam is 90 °, and has and be equipped with adjusting nut 11 on the outside of 2 opposite Hollow circular beams, is equipped with
Chucking lug 5 is welded in the upside of the Hollow circular beam of adjusting nut 11, and the Hollow circular beam inside groove equipped with adjusting nut 11 is telescopic chute 14,
11 Hollow circular beam inside groove of adjusting nut is not set as positioning rule slot 13.
2 graduated scales, 9,2 telescopic rods 10 of the positioning base 8 are respectively arranged in the Hollow circular beam of locating support 12
It is interior, and adjusting nut 11 is installed on the outside of the Hollow circular beam for keeping telescopic rod 10 to install.
The pressure cap 1 and pedestal 2 is cylindric, and diameter is identical, the radial diameter of sample 4 and 1 diameter phase of pressure cap
Together.
Embodiment 2: embodiment 2 is operating process of the invention
The rubber membrane 3 of sample 4 is wrapped up, and 3 top of rubber membrane is fixed on 1 outer of pressure cap, 3 lower part of rubber membrane is fixed
On 2 outer of pedestal, guarantee that rubber membrane 3 is close to internal sample 4.
By 8 sets of positioning base pressure cap 1, sample 4 and pedestal 2, and guarantee positioning base 8 central axes and sample 4 in
Axis is overlapped.
Locating support 12 is mounted on positioning base 8 by telescopic rod 10 and graduated scale 9, it can be with by adjusting nut 11
The mounting height for adjusting locating support 12, the numerical value of mounting height can be read using graduated scale 9, due to the graduated scale 9 of setting
It is symmetrical two, can guarantees 12 upper level of locating support by reading.
Two flexure elements 7 are sandwiched on chucking lug 5, the piezoelectric ceramic piece being arranged on flexure element 7 is made by respective chucking lug 5
6, by being provided with the rubber membranes 3 of symmetrical holes, are inserted into sample 4, are close to piezoelectric ceramic piece 6 with sample 4, and ensure two piezoelectricity pottery
Tile 6 is in the same plane, and the plane passes through the central axes of sample 4.
Flexure element 7 passes through the signal wire and piezoelectric linear amplifier and electricity of insulative water-proof without one end of piezoelectric ceramic piece 6
Lotus amplifier is connected, and piezoelectric linear amplifier is connected with arbitrary-function generator, digital oscilloscope and computer access device.
It needs to guarantee in installation process:
1. pressure cap 1 and pedestal 2 are cylindric, and diameter is identical, and the radial diameter of sample 4 is identical as 1 diameter of pressure cap.
2. reading graduated scale 9 needs sight level, and tightens adjusting nut 11, in order to avoid locating support 12 slides, lead to positioning not
It is quasi-.
3. 6 polarity of liang piezoelectric ceramic piece need to be oppositely arranged.
When work, arbitrary-function generator generates pulse signal after the amplification of piezoelectric linear amplifier, reaches 7 He of flexure element
Digital oscilloscope, the piezoelectric ceramic piece 6 on flexure element 7 generate weak vibration, longitudinal wave or shear wave are generated in sample 4, passes through examination
Sample 4 reaches other side piezoelectric ceramic piece 6, after charge amplifier is converted into voltage signal, on oscillograph by with from pressure
The initial transmissions pulse signal of linear amplifier compares, and obtains propagation time of the wave in sample 4, by sample 4 length and
The velocity of wave of sample is calculated in the propagation time of wave.
Comparative experiments:
One group of comparative experiments is set, and experimental group is propagation time and velocity of wave of the test waves of apparatus of the present invention in sample 4
(Fig. 8)；
Control group is using conventional apparatus, and the phase of chip is biography of the test waves in sample 4 in asymmetrical situation
Between sowing time and velocity of wave (Fig. 9).
Stablize it can be seen that control group (Fig. 8) receives signal waveform, no clutter, velocity of wave is readily discernible, the propagation time
0.776ms, velocity of wave 128.9m/s；And under same excitation signal (Fig. 9), flexure element causes waveform more random due to position inaccurate,
Clutter and interference signal are more, and velocity of wave is difficult to recognize, propagation time 0.755ms, velocity of wave 132.5m/s, and test result deviation occurs very
It is extremely unreasonable.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (8)
1. a kind of mounting and positioning device of side-mounted flexure element, which is characterized in that including pressure cap (1), pedestal (2), rubber membrane
(3), sample (4), chucking lug (5), flexure element (7), positioning base (8), locating support (12)；
The locating support (12) is installed on positioning base (8), and sample (4) is set to locating support (12) and positioning base
(8) in, sample (4) center line is kept to be overlapped with positioning base (8) center line, and sample (4) bottom is mounted on pedestal (2),
It is equipped with pressure cap (1), is wrapped up outside sample (4) using rubber membrane (3), the top of rubber membrane (3) is fixed on pressure at the top of sample (4)
The outer of cap (1), the lower part of rubber membrane (3) are fixed on the outer of pedestal (2), the rubber membrane (3) radially symmetrical two sides
Aperture；
Two piezoelectric ceramic pieces (6) are respectively arranged on two flexure elements (7), keep two piezoelectric ceramic pieces (6) in the same plane,
And its line of centres has the one of piezoelectric ceramic piece (6) by the center of circle of sample (4) on same plane, two flexure elements (7)
End is interior by two side opening insertion sample (4) of rubber membrane (3) respectively and is close to, and the polarity of piezoelectric ceramic piece (6) is opposite, fixed
Position ear (5) is the upper flexible otic placode of side opening, and flexure element (7) is sandwiched in the opening of chucking lug (5), chucking lug (5)
It is welded on locating support (12)；
The positioning base (8) is made of 2 equal diameter concentric loops, graduated scale (9), telescopic rod (10), two concentric circles
It is welded to connect between ring by 4 solid round rod, 2 graduated scales (9) of the positioning base (8), 2 telescopic rods (10) point
It is not installed in the Hollow circular beam of locating support (12), and outside the Hollow circular beam of the locating support (12) in installation telescopic rod (10)
Side is equipped with adjusting nut (11).
2. a kind of mounting and positioning device of side-mounted flexure element according to claim 1, which is characterized in that graduated scale (9),
Telescopic rod (10) is the vertical round bar of variable diameters, and graduated scale (9) is to mark graduated vertical round bar, 2 telescopic rod (10) welding
On annulus, and keeping the angle between two telescopic rods (10) is 180 °, and 2 graduated scales (9) are welded on installation telescopic rod (10)
On the annulus of ipsilateral, and keeping the angle between two graduated scales (9) is 180 °, and makes arbitrary scale ruler (9) and telescopic rod
(10) angle between is 90 °.
3. a kind of mounting and positioning device of side-mounted flexure element according to claim 1, which is characterized in that the positioning
Bracket (12) is made of an annulus and 4 Hollow circular beams, and Hollow circular beam is welded on annulus, keep any two Hollow circular beam it
Between angle be 90 °, and have and adjusting nut (11) be installed on the outside of 2 opposite Hollow circular beams, be equipped with adjusting nut (11)
Hollow circular beam upside weld chucking lug (5), be equipped with adjusting nut (11) Hollow circular beam inside groove be telescopic chute (14), do not set
Adjusting nut (11) Hollow circular beam inside groove is positioning rule slot (13).
4. a kind of mounting and positioning device of side-mounted flexure element according to claim 1, which is characterized in that the pressure cap
(1) and pedestal (2) is cylindric, and diameter is identical, and the diameter of sample (4) radial direction is identical as pressure cap (1) diameter.
5. a kind of installation and locating method of side-mounted flexure element, which is characterized in that
Sample (4) are wrapped up with rubber membrane (3) including step 1., rubber membrane (3) one end is installed on to the outer of pedestal (2), rubber
Epithelium (3) other end is installed on the outer of pressure cap (1)；Guarantee that rubber membrane (3) are close to internal sample (4)；
The concentric circles ring set over-voltage cap (1), sample (4) and pedestal (2) of positioning base (8) are held in position pedestal (8) by step 2.
Central axes be overlapped with the central axes of sample (4)；
Locating support (12) is installed on positioning base (8) by step 3., guarantees that telescopic rod (10) are installed in telescopic chute (14),
Graduated scale (9) is installed in positioning rule slot (13), and the height of locating support (12) is adjusted by adjusting nut (11), and passes through quarter
Spend the mounting height that ruler (9) read locating support (12)；
Flexure element (7) are installed in the aperture of chucking lug (5) by step 4., keep piezoelectric ceramic piece (6) and the examination of flexure element (7)
Sample (4) axis parallel, and it is in the same plane, another opposite side repeats the above process；
Step 5. passes through rubber in the diametrically opposite two sides aperture of rubber membrane (3), by the piezoelectric ceramic piece (6) of flexure element (7)
In aperture insertion sample (4) of film (3) radially, it is close to piezoelectric ceramic piece (6) with sample (4)；On same plane, two are kept
Piezoelectric ceramic piece (6) is in same plane, and the plane passes through the central axes of sample (4).
6. a kind of installation and locating method of side-mounted flexure element according to claim 5, which is characterized in that the step
Pressure cap (1) and pedestal (2) are cylindric in 1, and diameter is identical, and the diameter of sample (4) radial direction is identical as pressure cap (1) diameter.
7. a kind of installation and locating method of side-mounted flexure element according to claim 5, which is characterized in that the step
In 3, reading graduated scale (9) needs sight level, and tightens adjusting nut (11), in order to avoid locating support (12) slides, leads to positioning not
It is quasi-.
8. a kind of installation and locating method of side-mounted flexure element according to claim 5, which is characterized in that the step
In 5, two piezoelectric ceramic pieces (6) polarity need to be oppositely arranged.
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| CN201711267816.0A CN108169325B (en) | 2017-12-05 | 2017-12-05 | A kind of mounting and positioning device and method of side-mounted flexure element |
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| CN110988141B (en) * | 2019-11-29 | 2021-09-14 | 同济大学 | On-site soil sample three-dimensional testing device and method based on shear wave velocity |
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| CN102879468A (en) * | 2012-09-18 | 2013-01-16 | 东北大学 | Double-bending-element ultrasonic sensing test device and method for evaluating rock damage |
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| CN206531697U (en) * | 2017-01-22 | 2017-09-29 | 中国电建集团华东勘测设计研究院有限公司 | A kind of side-mounted flexure element measurement apparatus |
| CN207751938U (en) * | 2017-12-05 | 2018-08-21 | 中国科学院武汉岩土力学研究所 | A kind of mounting and positioning device of side-mounted flexure element |
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| CN102879468A (en) * | 2012-09-18 | 2013-01-16 | 东北大学 | Double-bending-element ultrasonic sensing test device and method for evaluating rock damage |
| CN103115964A (en) * | 2013-01-29 | 2013-05-22 | 中广核检测技术有限公司 | Ultrasonic automatic scanning device of main pump main shaft of nuclear power station |
| CN204988827U (en) * | 2015-08-25 | 2016-01-20 | 安徽理工大学 | Crooked first test sample preparation saturator of piezoceramics |
| CN205749154U (en) * | 2016-07-14 | 2016-11-30 | 中国科学院武汉岩土力学研究所 | A kind of temp.-controlled type triaxial apparatus surveyed with flexure element and accurate body variable |
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