CN2602355Y - Triaxial indoor piezoelectric ceramics organ soil sample wave velocity metering equipment - Google Patents
Triaxial indoor piezoelectric ceramics organ soil sample wave velocity metering equipment Download PDFInfo
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- CN2602355Y CN2602355Y CN 02261611 CN02261611U CN2602355Y CN 2602355 Y CN2602355 Y CN 2602355Y CN 02261611 CN02261611 CN 02261611 CN 02261611 U CN02261611 U CN 02261611U CN 2602355 Y CN2602355 Y CN 2602355Y
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Abstract
The utility model discloses a triaxial indoor piezoelectric ceramics organ soil sample wave velocity metering equipment, which comprises an upper gland and a lower gland of the soil sample in the triaxial chamber, whose interiors are respectively provided with a transmitting element and a receiving element which are sealed by epoxy resin. One cantilever-shaped end is inserted into the soil sample and the other end is filled with and fixed by epoxy resin, an outgoing line port is sealed by a sealing and pressing bolt, an outgoing signal wire sleeved with a waterproof pressure pipe is led to an outdoor place with help of the sealing and pressing bolt on a triaxial chamber base and further connected with shielding signal wires respectively. A transmitting signal wire is connected with a piezoelectric linear amplifier, a digital oscillograph and a memory, the piezoelectric linear amplifier is connected with any function generator; and a signal receiving wire is connected by a charge amplifier with the oscillograph and the memory. The utility model is capable to ensure a good working status of the transmitting element and the receiving element in a speed test made to the piezoceramics soil sample in the triaxial chamber under the high-pressure water ambient and has perfectly good water and damp proofing performance and durability. The utility model also has the advantages of definite principle, simple structure and convenient use.
Description
Technical field
The utility model is a kind of device that adopts piezoelectric ceramics unit test soil sample velocity of wave in triaxial chamber in high humility and the water under high pressure environment.
Technical background
At present, domestic piezoelectric ceramics unit's test macro and the corresponding device thereof of still not having interior soil sample compressional wave of triaxial chamber and transverse wave speed test, and the soil sample longitudinal wave velocity adopts the supercritical ultrasonics technology test usually, the shortcoming that exists compressional wave then to judge than difficulty.In triaxial chamber in high humility and the water under high pressure environment, the external epoxy resin that adopts usually seals and is installed in corresponding site to high impedance piezoelectric ceramics unit, but have that epoxy sealing layer thickness considerable influence piezoelectric ceramics unit rigidity, sealant exist easily that bubble causes that humidity resistance is relatively poor, the aging humidity resistance of epoxy resin reduces the first dither of serviceable life, piezoelectric ceramics that influence sensor and causes epoxy sealing layer microfracture and produce short circuit and problem such as scrap.
Summary of the invention
The purpose of this utility model provides the device of piezoelectric ceramics unit soil sample wave velocity testing in a kind of triaxial chamber, not only solve the electrical connection problem of whole test system, and solved high impedance piezoelectric ceramics emission unit, receive unit (hereinafter to be referred as emission unit, receive unit) installation in triaxial chamber, waterproof and dampproof and endurance issues.
The technical solution adopted in the utility model is as follows:
It is included in the upper press cover of soil sample in the triaxial chamber and is equipped with an emission unit, it is a cantilever-shaped end and inserts the soil sample upper end, the other end is fixed in the upper press cover and is connected with storer with outdoor piezoelectricity linear amplifier and digital oscilloscope through shielded signal wire, and the piezoelectricity linear amplifier is connected with arbitrary-function generator; Be equipped with one in the lower cover of soil sample and receive unit, it is a cantilever-shaped end and inserts the soil sample lower end, and the other end is fixed in the lower cover and is connected with outdoor charge amplifier through shielded signal wire, and charge amplifier connects digital oscilloscope and storer; Be connected with axial boosting-rod with upper press cover, be connected with soil sample base or built-in force transducer with lower cover; It is characterized in that:
1) emission unit surface epoxy sealing, being a cantilever-shaped end inserts in the soil sample upper end, the other end is mounted in the mounting groove of upper press cover with epoxy resin, and space first with flexible material filling emission and permeable stone, permeable stone connects drainpipe, the soil sample upper press cover is drawn the signal wire mouth and is pressed solidly bolt seal with sealing, and presses solidly the line that transmits that is with waterproof pressure-resistant plastic tube or nylon tube outside drawing the bolt from sealing;
2) receive unit's surface epoxy sealing, being a cantilever-shaped end inserts in the soil sample lower end, the other end is mounted in the mounting groove of lower cover with epoxy resin, and space first with flexible material filling reception and permeable stone, permeable stone connects down drainpipe, the soil sample lower cover is drawn the signal wire mouth and is pressed solidly bolt seal with sealing, and presses solidly the received signal line that is with waterproof pressure-resistant plastic tube or nylon tube outside drawing the bolt from sealing;
3) from the upper and lower gland of soil sample, draw emission, the received signal line that is with waterproof pressure-resistant plastic tube or nylon tube respectively, be added with pressing solidly in the bolt of O-ring seal on the triaxial chamber base and draw by being contained in, respectively by the emission shielded signal wire, receive shielded signal wire and connect piezoelectricity linear amplifier and digital oscilloscope, charge amplifier.
The beneficial effect that the utlity model has is:
By adopting such scheme, guaranteed the works fine state of the piezoceramic transducer of soil sample wave velocity testing in triaxial cell's inner high voltage water environment, and made piezoceramic transducer have fabulous waterproof and dampproof performance and permanance; This device also has principle characteristics clear and definite, simple in structure, easy to use.
Description of drawings
Fig. 1 is a piezoelectric ceramics unit soil sample wave velocity testing schematic diagram of device in the triaxial chamber;
Fig. 2 is a piezoelectric ceramics unit installation method synoptic diagram on soil sample upper press cover or the lower cover;
Fig. 3 is the vertical view of Fig. 2;
Fig. 4 is the emission of piezoelectric ceramics unit, received signal line and soil sample upper press cover, lower cover or triaxial chamber base seal connecting method synoptic diagram;
Fig. 5 is the another kind of connection diagram of Fig. 4 emission, received signal line and triaxial chamber base seal connecting method.
Among the figure 1, axial boosting-rod 2, last drainpipe 2 ', following drainpipe 3, upper press cover 3 ', lower cover 4, piezoelectric ceramics emission unit 4 ', piezoelectric ceramics receives unit 5, triaxial chamber 6,6 ', permeable stone 7,7 ', sealing presses solidly bolt 8,8 ', be respectively the emission that is contained in waterproof pressure-resistant plastic or the nylon tube, received signal line 9, soil sample 10,10 ', be respectively emission, the packoff 11,11 ' of received signal line and triaxial cell's base, be respectively emission, receive shielded signal wire 12, soil sample base 13, triaxial chamber base 14, flexible packing material 15, epoxy resin 16, waterproof pressure-resistant plastic or nylon signal conduit 17, nylon (rubber) O-ring seal+red copper sealing gasket+sealing raw material band 18, sealing presses solidly bolt 19, base signal wire passage.
Embodiment
As Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, piezoelectric ceramics unit soil sample wave velocity testing device in the triaxial chamber, it is included in the upper press cover 3 of soil samples 9 in the triaxial chamber 5 and is equipped with an emission unit 4, it is a cantilever-shaped end and inserts soil sample 9 upper ends, the other end is fixed in the upper press cover 3 and is connected with storer with outdoor piezoelectricity linear amplifier and digital oscilloscope through shielded signal wire 11, and the piezoelectricity linear amplifier is connected with arbitrary-function generator; Be equipped with one in the lower cover 3 ' of soil sample 9 and receive unit 4 ', it is a cantilever-shaped end and inserts soil sample 9 lower ends, the other end is fixed in the lower cover 3 ' and is connected with outdoor charge amplifier through shielded signal wire 11 ', and charge amplifier connects digital oscilloscope and storer; Be connected with axial boosting-rod 1 with upper press cover 3, be connected with soil sample base 12 or built-in force transducer with lower cover 3 '.
1) emission unit 4 surface epoxy sealings, being a cantilever-shaped end inserts in soil sample 9 upper ends, the other end is mounted in the mounting groove of upper press cover 3 with epoxy resin 15, and fill the space of emission unit 4 and permeable stone 6 with flexible material 14, permeable stone 6 connects drainpipe 2, soil sample upper press cover 3 is drawn the signal wire mouth and is pressed solidly bolt 7 sealing with sealing, and presses solidly the line 8 that transmits that is with waterproof pressure-resistant plastic tube or nylon tube 16 outside drawing the bolt 7 from sealing;
2) receive unit's 4 ' surface epoxy sealing, being a cantilever-shaped end inserts in soil sample 9 lower ends, the other end is mounted in the mounting groove of lower cover 3 ' with epoxy resin 15, and fill the space that receives unit 4 ' and permeable stone 6 ' with flexible material 14, permeable stone 6 ' connects down drainpipe 2 ', soil sample lower cover 3 ' is drawn the signal wire mouth and is pressed solidly bolt 7 ' sealing with sealing, and presses solidly the received signal line 8 ' that is with waterproof pressure-resistant plastic tube or nylon tube 16 outside drawing the bolt 7 ' from sealing;
3) from the upper and lower gland of soil sample 93,3 ', draw emission, the received signal line 8,8 ' that is with waterproof pressure-resistant plastic tube or nylon tube 16 respectively, be added with pressing solidly in the bolt 10,10 ' of O-ring seal 17 on the triaxial chamber base 13 and draw by being contained in, respectively by emission shielded signal wire 11, receive shielded signal wire 11 ' and connect piezoelectricity linear amplifier and digital oscilloscope, charge amplifier.
The emission unit 4 of piezoelectric ceramics unit soil sample wave velocity testing device and reception unit 4 ' are high impedance piezoelectric ceramics unit sensor in the triaxial chamber, the surface epoxy sealing.
As shown in Figure 4, test upper press cover 3 is drawn the signal wire mouth and is added with O-ring seal 17, presses solidly bolt 7 with sealing and seals, and press solidly the line 8 that transmits that is with waterproof pressure-resistant plastic tube or nylon tube 16 outside drawing the bolt 7 from sealing; Test lower cover 3 ' is drawn the signal wire mouth and is added with O-ring seal 17, presses solidly bolt 7 ' with sealing and seals, and press solidly the received signal line 8 ' that is with waterproof pressure-resistant plastic tube or nylon tube 16 outside drawing the bolt 7 ' from sealing.
As shown in Figure 5, from the upper and lower gland of soil sample 93,3 ', draw emission, the received signal line 8,8 ' that is with waterproof pressure-resistant plastic tube or nylon tube 16 respectively, by be contained in another sealing press solidly be added with O-ring seal 17 on the bolt 18 press solidly bolt 10,10 ' and be contained in and press solidly bolt 18 on the triaxial chamber base 13, from the passage 19 of triaxial chamber base 13, draw, respectively by emission shielded signal wire 11, receive shielded signal wire 11 ' and connect piezoelectricity linear amplifier and digital oscilloscope, charge amplifier.
O-ring seal 17 is made up of sealed nylon circle+red copper sealing gasket+sealing raw material band, or is made up of rubber seal+red copper sealing gasket+sealing raw material band.
The waterproof and dampproof installation of piezoelectric ceramics unit 4,4 ' in triaxial chamber 5 is the key of this test macro, can realize by the following method: high impedance piezoelectric ceramics unit 4,4 ' and the surface of its wiring pedestal with the epoxy sealing that contains an amount of hardening agent, sealant is wanted evenly, should not be too thick, must not there be bubble to exist, to guarantee waterproof and dampproof property, toughness and the ageing resistance of sealant; Piezoelectric ceramics unit 4,4 ' needs to insert that an end is cantilever position in the soil sample, and an end of its wiring pedestal embeds in the mounting groove of soil sample 9 upper press covers 3 or lower cover 3 ', fills fixing by epoxy resin 15.
Its course of work is: in triaxial chamber 5, emission unit 4 one ends of epoxy sealing insert soil sample 9 upper ends, the other end is mounted in soil sample 9 upper press covers 3 with epoxy resin 15, and is electrically connected through triaxial chamber base 13 and function generators by the waterproof and dampproof shielding line 8,11 that transmits; Reception unit 4 ' one end of epoxy sealing inserts soil sample 9 lower ends, and the other end is mounted in soil sample 9 lower covers 3 ' with epoxy resin 15, and is electrically connected with digital oscilloscope through triaxial chamber base 13 by waterproof and dampproof shielding received signal line 8 ', 11 '; When function generator produces a pulse signal after the piezoelectricity linear amplifier amplifies, reach emission unit 4 and digital oscilloscope, emission unit 4 will produce a faint vertical or horizontal vibration, in soil sample 9, produce a ripple based on compressional wave or shear wave, reach reception unit 4 ' and reception by soil sample 9, after charge amplifier is converted into voltage signal, on oscillograph by with from the contrast of the initial transmissions pulse signal of piezoelectricity linear amplifier, obtain the travel-time of ripple in soil sample 9, the velocity of wave that obtains soil sample 9 by the length and the wave propagation Time Calculation of soil sample 9.
Claims (6)
1. piezoelectric ceramics unit soil sample wave velocity testing device in the triaxial chamber, it is included in and is equipped with an emission unit (4) in the upper press cover (3) of the interior soil sample of triaxial chamber (5) (9), it is a cantilever-shaped end and inserts soil sample (9) upper end, the other end is fixed in the upper press cover (3) and is connected with storer with outdoor piezoelectricity linear amplifier and digital oscilloscope through shielded signal wire (11), and the piezoelectricity linear amplifier is connected with arbitrary-function generator; Be equipped with one in the lower cover (3 ') of soil sample (9) and receive unit's (4 '), it is a cantilever-shaped end and inserts soil sample (9) lower end, the other end is fixed in the lower cover (3 ') and is connected with outdoor charge amplifier through shielded signal wire (11 '), and charge amplifier connects digital oscilloscope and storer; Be connected with axial boosting-rod (1) with upper press cover (3), be connected with soil sample base (12) or built-in force transducer with lower cover (3 '); It is characterized in that:
1) emission unit (4) surface epoxy sealing, being a cantilever-shaped end inserts in soil sample (9) upper end, the other end is mounted in the mounting groove of upper press cover (3) with epoxy resin (15), and fill the space of emission unit (4) and permeable stone (6) with flexible material (14), permeable stone (6) connects drainpipe (2), soil sample upper press cover (3) is drawn the signal wire mouth and is pressed solidly bolt (7) sealing with sealing, and presses solidly the line that transmits (8) that is with waterproof pressure-resistant plastic tube or nylon tube (16) outside drawing the bolt (7) from sealing;
2) receive unit's (4 ') surface epoxy sealing, being a cantilever-shaped end inserts in soil sample (9) lower end, the other end is mounted in the mounting groove of lower cover (3 ') with epoxy resin (15), and fill to receive the space of unit's (4 ') and permeable stone (6 ') with flexible material (14), permeable stone (6 ') connects down drainpipe (2 '), soil sample lower cover (3 ') is drawn the signal wire mouth and is pressed solidly bolt (7 ') sealing with sealing, and presses solidly the received signal line (8 ') that is with waterproof pressure-resistant plastic tube or nylon tube (16) outside drawing the bolt (7 ') from sealing;
3) from the upper and lower gland of soil sample (9) (3,3 '), draw emission, the received signal line (8,8 ') that is with waterproof pressure-resistant plastic tube or nylon tube (16) respectively, be added with pressing solidly in the bolt (10,10 ') of O-ring seal (17) on the triaxial chamber base (13) and draw by being contained in, respectively by emission shielded signal wire (11), receive shielded signal wire (11 ') and connect piezoelectricity linear amplifier and digital oscilloscope, charge amplifier.
2. piezoelectric ceramics unit soil sample wave velocity testing device in the triaxial chamber according to claim 1 is characterized in that said emission unit (4) and receives unit's (4 ') being high impedance piezoelectric ceramics unit sensor, surface epoxy sealing.
3. piezoelectric ceramics unit soil sample wave velocity testing device in the triaxial chamber according to claim 1, it is characterized in that: test upper press cover (3) is drawn the signal wire mouth and is added with O-ring seal (17), press solidly bolt (7) sealing with sealing, and press solidly the line that transmits (8) that is with waterproof pressure-resistant plastic tube or nylon tube (16) outside drawing the bolt (7) from sealing.
4. piezoelectric ceramics unit soil sample wave velocity testing device in the triaxial chamber according to claim 1, it is characterized in that: test lower cover (3 ') is drawn the signal wire mouth and is added with O-ring seal (17), press solidly bolt (7 ') sealing with sealing, and press solidly the received signal line (8 ') that is with waterproof pressure-resistant plastic tube or nylon tube (16) outside drawing the bolt (7 ') from sealing.
5. piezoelectric ceramics unit soil sample wave velocity testing device in the triaxial chamber according to claim 1, it is characterized in that: on soil sample (9), lower cover (3,3 ') draw the emission that is with waterproof pressure-resistant plastic tube or nylon tube (16) in respectively, received signal line (8,8 '), by be contained in another sealing press solidly be added with O-ring seal (17) on the bolt (18) press solidly bolt (10,10 ') and the bolt (18) that presses solidly that is contained on the triaxial chamber base (13) from the passage (19) of triaxial chamber base (13), draw, respectively by the emission shielded signal wire (11), receive shielded signal wire (11 ') and connect piezoelectricity linear amplifier and digital oscilloscope, charge amplifier.
6. piezoelectric ceramics unit soil sample wave velocity testing device in the triaxial chamber according to claim 1, it is characterized in that said O-ring seal (17) is made up of sealed nylon circle+red copper sealing gasket+sealing raw material band, or form by rubber seal+red copper sealing gasket+sealing raw material band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02261611 CN2602355Y (en) | 2002-11-12 | 2002-11-12 | Triaxial indoor piezoelectric ceramics organ soil sample wave velocity metering equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02261611 CN2602355Y (en) | 2002-11-12 | 2002-11-12 | Triaxial indoor piezoelectric ceramics organ soil sample wave velocity metering equipment |
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| Publication Number | Publication Date |
|---|---|
| CN2602355Y true CN2602355Y (en) | 2004-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02261611 Expired - Fee Related CN2602355Y (en) | 2002-11-12 | 2002-11-12 | Triaxial indoor piezoelectric ceramics organ soil sample wave velocity metering equipment |
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| CN (1) | CN2602355Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101413823B (en) * | 2008-05-12 | 2011-01-19 | 浙江大学 | Portable piezoelectric ceramic bending element soil body shear wave speed test device |
| CN105649117A (en) * | 2016-01-20 | 2016-06-08 | 温州大学瓯江学院 | Vacuum preloading method effectiveness real-time detection method and device |
| CN109556945A (en) * | 2018-10-31 | 2019-04-02 | 同济大学 | A kind of flexure element velocity of wave Auto-Test System |
| CN112630416A (en) * | 2020-12-07 | 2021-04-09 | 温州大学 | Test device for simulating power generation performance of piezoelectric device under different vehicle loads based on triaxial apparatus |
-
2002
- 2002-11-12 CN CN 02261611 patent/CN2602355Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101413823B (en) * | 2008-05-12 | 2011-01-19 | 浙江大学 | Portable piezoelectric ceramic bending element soil body shear wave speed test device |
| CN105649117A (en) * | 2016-01-20 | 2016-06-08 | 温州大学瓯江学院 | Vacuum preloading method effectiveness real-time detection method and device |
| CN109556945A (en) * | 2018-10-31 | 2019-04-02 | 同济大学 | A kind of flexure element velocity of wave Auto-Test System |
| CN112630416A (en) * | 2020-12-07 | 2021-04-09 | 温州大学 | Test device for simulating power generation performance of piezoelectric device under different vehicle loads based on triaxial apparatus |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |