CN2804819Y - Piezoelectric ceramic primary sample wave velocity measuring device mounted on consolidation meter - Google Patents
Piezoelectric ceramic primary sample wave velocity measuring device mounted on consolidation meter Download PDFInfo
- Publication number
- CN2804819Y CN2804819Y CN 200520013094 CN200520013094U CN2804819Y CN 2804819 Y CN2804819 Y CN 2804819Y CN 200520013094 CN200520013094 CN 200520013094 CN 200520013094 U CN200520013094 U CN 200520013094U CN 2804819 Y CN2804819 Y CN 2804819Y
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- piezoelectric ceramics
- soil sample
- pressure cap
- wave velocity
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The utility model discloses a a piezoelectric ceramic element soil sample wave velocity measurement device mounted on a consolidation meter, which comprises an emission element and a reception element which are sealed by ethoxyline and are respectively arranged between a pressure cap and a base of the consolidation meter, wherein one cantilever-shaped end is exposed and is inserted into a soil body, and the rest part is embedded and fixed in an installation groove by the ethoxyline. Signal lines of bending elements of emission and reception are respectively led out from the pressure cap and a pore canal on the base and are packaged in a plastic hose wiich is firmly sealed in the pore canal by the ethoxyline. An emission signal line, a piezoelectric linear amplifier, a digital oscilloscope and a memory are connected, the piezoelectric linear amplifier and an arbitrary function generator are connected, and a reception signal line is connected with the digital oscilloscope and the memory through a charge amplifier. The utility model assures that the bending elements for measuring wave velocity have good working state in the range of low pressure and high pressure, and the utility model has good durability, water resistance and humidity resistance performance, and also has the characteristics of definite principle, simple structure and convenient manufacture and use.
Description
Technical field
The utility model relates to a kind of piezoelectric ceramics unit soil sample wave velocity testing device of installing on consolidometer.
Background technology
Zhejiang University had once installed piezoelectric ceramic bending element soil sample wave velocity testing device and had applied for the patent (patent No.: ZL 02261611.X) in triaxial chamber, but at present domestic piezoelectric ceramic bending element test macro and the corresponding device thereof of still not having soil sample compressional wave and transverse wave speed test on the consolidometer, the soil sample longitudinal wave velocity adopted the supercritical ultrasonics technology test usually in the past, have the then difficult shortcoming of judging of compressional wave, and it is very difficult that the supercritical ultrasonics technology test macro is installed on consolidometer.In the environment of consolidometer high pressure and high humidity, the external epoxy resin that adopts usually seals and is installed in corresponding site to the high impedance piezoelectric ceramic bending element, but have that epoxy sealing layer thickness considerable influence piezoelectric ceramic bending element 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 is to provide a kind of piezoelectric ceramics unit soil sample wave velocity testing device of installing on consolidometer.
The technical solution adopted in the utility model is as follows:
Comprise base, permeable stone and pressure cap.On the small boss of the center of spill base permeable stone under the annular is housed, following permeable stone lower surface contacts with following drainage channel, and following permeable stone upper surface contacts with the soil sample lower surface; On the center small boss of convex pressure cap the annular upper dankness stone is housed, the upper dankness stone upper surface contacts with last drainage channel on the pressure cap, and the upper dankness stone lower surface contacts with the soil sample upper surface; Piezoelectric ceramics emission unit is installed in the middle of the pressure cap, one end inserts the soil sample upper end, remainder is fixed in the last mounting groove of pressure cap, the line that transmits of stiff end end is drawn through the emission shielded signal wire from pressure cap and is connected with an end of piezoelectricity linear amplifier and digital oscilloscope and storer respectively, and the piezoelectricity linear amplifier is connected with arbitrary-function generator; Piezoelectric ceramics is installed on the base receives unit, it is a cantilever-shaped end and inserts the soil sample lower end, remainder is fixed in the following mounting groove of base, the received signal line that draw the stiff end end is connected with charge amplifier through receiving shielded signal wire, and charge amplifier connects the other end of digital oscilloscope and storer.
The beneficial effect that the utlity model has is:
It has not only solved the electrical connection problem of whole test system, and has solved high impedance piezoelectric ceramics emission unit, installation, the waterproof and dampproof and endurance issues of reception unit on consolidometer.Guaranteed on the consolidometer that piezoelectric ceramics unit has good working order in the high pressure and water environment, and made piezoelectric ceramics unit have good waterproof and dampproof performance and permanance; This device also has the characteristics that principle is clear and definite, simple in structure, making is easy to use.
Description of drawings
Fig. 1 is a piezoelectric ceramics unit soil sample wave velocity testing schematic diagram of device on the consolidometer;
Fig. 2 is a piezoelectric ceramics unit installation method cut-open view on the pressure cap;
Fig. 3 is the upward view of Fig. 2;
Fig. 4 is a piezoelectric ceramics unit installation method vertical view on the base;
Fig. 5 is the A-A cut-open view of Fig. 4.
Among the figure: 1,1 ', be respectively emission, received signal line; 2,2 ', be respectively emission, receive shielded signal wire; 3, pressure cap; 4, base; 5, piezoelectric ceramics emission unit; 5 ', piezoelectric ceramics receives unit; 6,6 ', be respectively upper and lower drainage channel; 7,7 ', be respectively upper and lower permeable stone; 8, cuff; 9, soil sample; 10, cutting ring; 11,11 ', be respectively upper and lower mounting groove; 12,12 ', be respectively upper and lower duct.
Embodiment
As Fig. 1～shown in Figure 5, the utility model is on the small boss of the center of spill base 4 permeable stone 7 ' under the annular to be housed, and following permeable stone 7 ' lower surface contacts with following drainage channel 6 ', and following permeable stone 7 ' upper surface contacts with soil sample 9 lower surfaces; On the center small boss of convex pressure cap 3 annular upper dankness stone 7 is housed, upper dankness stone 7 upper surfaces contact with last drainage channel 6 on the pressure cap 3, and upper dankness stone 7 lower surfaces contact with soil sample 9 upper surfaces; Piezoelectric ceramics emission unit 5 is installed in the middle of the pressure cap 3, one end inserts soil sample 9 upper ends, remainder is fixed in the last mounting groove 11 of pressure cap 3, the line 1 that transmits of stiff end end is drawn through emission shielded signal wire 2 from pressure cap and is connected with an end of piezoelectricity linear amplifier and digital oscilloscope and storer respectively, and the piezoelectricity linear amplifier is connected with arbitrary-function generator; Piezoelectric ceramics is installed on the base 4 receives unit 5 ', it is a cantilever-shaped end and inserts soil sample 9 lower ends, remainder is fixed in the following mounting groove 11 ' of base 4, the received signal line 1 ' that draw the stiff end end is connected with charge amplifier through receiving shielded signal wire 2 ', and charge amplifier connects the other end of digital oscilloscope and storer.Soil sample 9 usefulness cutting rings 10 cut out, and overcoat cuff 8 is contained between the upper and lower permeable stone.
It is high impedance piezoelectric ceramics unit sensor that described piezoelectric ceramics emission unit 5 and piezoelectric ceramics receive unit 5 ', the surface epoxy sealing.
The described line 1 that transmits is drawn the duct 12 from pressure cap 3, is with plastic flexible pipe outward, is enclosed in admittedly in the duct 12 with epoxy resin filling duct and with plastic flexible pipe.
Described received signal line 1 ' is drawn from 4 times ducts 12 ' of base, is with plastic flexible pipe outward, is enclosed in down in the duct 12 ' admittedly with epoxy resin filling duct and with plastic flexible pipe.
The necessary instrument that the utility model adopts has:
1. arbitrary-function generator: AFG 310
2. piezoelectricity linear amplifier: EPA-104
3. charge amplifier: 4102
4. digital oscilloscope and storer: TDS 3032
In order to guarantee that piezoelectric ceramic bending element has good working performance under consolidometer high pressure and high humidity environment, this test macro notes following problem when fabrication and installation: at the surface of high impedance piezoelectric ceramic bending element and its wiring pedestal 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 one end is cantilever position and inserts in the soil sample (end of no wiring pedestal), and remainder is mounted in the mounting groove of pressure cap or base with epoxy resin.
Principle of work of the present utility model is: piezoelectric ceramics emission unit 5 one ends of epoxy sealing insert soil sample 9 upper ends, the other end is mounted on the pressure cap 3 in the mounting groove 11 with epoxy resin, and by the line 1 that transmits, the emission shielded signal wire 2 be connected with storer with piezoelectricity linear amplifier and digital oscilloscope, the piezoelectricity linear amplifier is connected with arbitrary-function generator; The piezoelectric ceramics of epoxy sealing receives unit's 5 ' one end and inserts soil sample 9 lower ends, the other end is mounted in the following mounting groove 11 ' of base 4 with epoxy resin, and by received signal line 1 ', receive shielded signal wire 2 ' and be connected with charge amplifier, charge amplifier connects digital oscilloscope; When function generator produces a pulse signal after the piezoelectricity linear amplifier amplifies, reach piezoelectric ceramics emission unit 5 and digital oscilloscope, piezoelectric ceramics emission unit 5 will produce a faint vertical or horizontal vibration, in soil sample 9, produce a fluctuation based on compressional wave or shear wave, reach piezoelectric ceramics by soil sample 9 and receive unit 5 ' and reception, 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, obtain the velocity of propagation of ripple in soil sample 9 by the length and the wave propagation Time Calculation of soil sample 9.
Claims (5)
1. piezoelectric ceramics unit soil sample wave velocity testing device is installed on consolidometer, comprise base, permeable stone and pressure cap, it is characterized in that: permeable stone (7 ') under the annular is housed on the center small boss of spill base (4), following permeable stone (7 ') lower surface contacts with following drainage channel (6 '), and following permeable stone (7 ') upper surface contacts with soil sample (9) lower surface; Annular upper dankness stone (7) is housed on the center small boss of convex pressure cap (3), and upper dankness stone (7) upper surface contacts with last drainage channel (6) on the pressure cap (3), and upper dankness stone (7) lower surface contacts with soil sample (9) upper surface; Piezoelectric ceramics emission unit (5) is installed in the middle of the pressure cap (3), one end inserts soil sample (9) upper end, remainder is fixed in the last mounting groove (11) of pressure cap (3), the line that transmits (1) of stiff end end is drawn through emission shielded signal wire (2) from pressure cap and is connected with an end of piezoelectricity linear amplifier and digital oscilloscope and storer respectively, and the piezoelectricity linear amplifier is connected with arbitrary-function generator; Piezoelectric ceramics is installed on the base (4) receives unit's (5 '), it is a cantilever-shaped end and inserts soil sample (9) lower end, remainder is fixed in the following mounting groove (11 ') of base (4), the received signal line (1 ') that draw the stiff end end is connected with charge amplifier through receiving shielded signal wire (2 '), and charge amplifier connects the other end of digital oscilloscope and storer.
2. the piezoelectric ceramics unit soil sample wave velocity testing device of on consolidometer, installing according to claim 1, it is characterized in that: described piezoelectric ceramics emission unit (5) and piezoelectric ceramics receive unit's (5 ') and are high impedance piezoelectric ceramics unit sensor, surface epoxy sealing.
3. the piezoelectric ceramics unit soil sample wave velocity testing device of on consolidometer, installing according to claim 1, it is characterized in that: the described line that transmits (1) is gone up the duct (12) from pressure cap (3) and is drawn, be with plastic flexible pipe outward, be enclosed in admittedly in the duct (12) with epoxy resin filling duct and with plastic flexible pipe.
4. the piezoelectric ceramics unit soil sample wave velocity testing device of on consolidometer, installing according to claim 1, it is characterized in that: described received signal line (1 ') is drawn the duct (12 ') down from base (4), be with plastic flexible pipe outward, be enclosed in down admittedly in the duct (12 ') with epoxy resin filling duct and with plastic flexible pipe.
5. the piezoelectric ceramics unit soil sample wave velocity testing device of installing on consolidometer according to claim 1, it is characterized in that: pressure cap (3) and base (4) center small boss height equate with the upper and lower permeable stone of annular (7,7 ') thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520013094 CN2804819Y (en) | 2005-07-08 | 2005-07-08 | Piezoelectric ceramic primary sample wave velocity measuring device mounted on consolidation meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520013094 CN2804819Y (en) | 2005-07-08 | 2005-07-08 | Piezoelectric ceramic primary sample wave velocity measuring device mounted on consolidation meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2804819Y true CN2804819Y (en) | 2006-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520013094 Expired - Lifetime CN2804819Y (en) | 2005-07-08 | 2005-07-08 | Piezoelectric ceramic primary sample wave velocity measuring device mounted on consolidation meter |
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| Country | Link |
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| CN (1) | CN2804819Y (en) |
Cited By (8)
| 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 |
| CN102645266A (en) * | 2012-04-01 | 2012-08-22 | 浙江大学 | Soil mass elastic wave velocity testing piezoelectric sensor for centrifugal model test |
| 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 |
| CN105651605A (en) * | 2016-01-12 | 2016-06-08 | 浙江大学 | Minitype piezoelectric telescopic element, compression wave measurement device and compression wave measurement method for centrifuge testing |
| 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 |
| CN107525577A (en) * | 2017-08-21 | 2017-12-29 | 兰州交通大学 | Attenuation of P-wave measurement apparatus and method |
| CN113029816A (en) * | 2020-12-18 | 2021-06-25 | 浙江理工大学 | Real-time monitoring device and method for curing contaminated soil process based on MICP |
| CN113029816B (en) * | 2020-12-18 | 2024-05-31 | 浙江理工大学 | Real-time monitoring device and method for polluted soil curing process based on MICP |
-
2005
- 2005-07-08 CN CN 200520013094 patent/CN2804819Y/en not_active Expired - Lifetime
Cited By (11)
| 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 |
| CN102645266A (en) * | 2012-04-01 | 2012-08-22 | 浙江大学 | Soil mass elastic wave velocity testing piezoelectric sensor for centrifugal model test |
| 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 |
| CN102879468B (en) * | 2012-09-18 | 2014-09-03 | 东北大学 | Double-bending-element ultrasonic sensing test device and method for evaluating rock damage |
| CN105651605A (en) * | 2016-01-12 | 2016-06-08 | 浙江大学 | Minitype piezoelectric telescopic element, compression wave measurement device and compression wave measurement method for centrifuge testing |
| CN105651605B (en) * | 2016-01-12 | 2019-05-07 | 浙江大学 | Miniature piezoelectric telescopic element, compression wave measuring apparatus and the method for centrifuge test |
| 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 |
| CN107525577A (en) * | 2017-08-21 | 2017-12-29 | 兰州交通大学 | Attenuation of P-wave measurement apparatus and method |
| CN107525577B (en) * | 2017-08-21 | 2023-04-07 | 兰州交通大学 | Longitudinal wave attenuation measuring device and method |
| CN113029816A (en) * | 2020-12-18 | 2021-06-25 | 浙江理工大学 | Real-time monitoring device and method for curing contaminated soil process based on MICP |
| CN113029816B (en) * | 2020-12-18 | 2024-05-31 | 浙江理工大学 | Real-time monitoring device and method for polluted soil curing process based on MICP |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150708 Granted publication date: 20060809 |
|
| EXPY | Termination of patent right or utility model |