CN208224505U - Vibration excitor and test device in a kind of steady state shearing wave instrument connection - Google Patents
Vibration excitor and test device in a kind of steady state shearing wave instrument connection Download PDFInfo
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- CN208224505U CN208224505U CN201820885309.7U CN201820885309U CN208224505U CN 208224505 U CN208224505 U CN 208224505U CN 201820885309 U CN201820885309 U CN 201820885309U CN 208224505 U CN208224505 U CN 208224505U
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- vibration excitor
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Abstract
The utility model provides vibration excitor and test device in a kind of steady state shearing wave instrument connection, the vibration excitor includes shell, stable state exciting device and wall attaching device, stable state exciting device includes silicon steel sheet frame, electromagnetic coil and vibration head, silicon steel sheet frame is fixed on being horizontally mounted in hole of shell, electromagnetic coil accesses half-wave ac signal, silicon steel sheet frame and electromagnetic coil constitute the static part of vibration excitor in hole together with shell, vibration head is connect with silicon steel sheet frame by elastomeric element, vibration head is made by soft magnetic materials, positioned at being horizontally mounted at the aperture in hole, vibration head is the moving part of vibration excitor in hole, the both ends of shell are arranged in wall attaching device, electromagnetic coil accesses the magnetic field that half-wave ac signal generates mechanical periodicity, vibration head moves back and forth under the magnetic fields of mechanical periodicity, exciting borehole wall, swash in drilling Shake stratum shearing wave out, to solve the problems, such as that hole depth is larger, rock-soil layer is harder or impenetrably table taps excitation shearing wave when drilling is located at waters.
Description
Technical field
The utility model belongs to Geotechnical Engineering field, more specifically, is related to a kind of steady state shearing wave test
Vibration excitor and test device in hole.
Background technique
Shear wave velocity is an important parameter for reflecting medium to shearing wave transmission capacity and Rock And Soil dynamic characteristics, ground
The shear wave velocity index of layer is widely used in engineering practice.Single-hole method wave velocity testing is tested in geotechnical investigation
The important means of Rock And Soil shear wave velocity.
Currently, single-hole method shear wave velocity measurement mostly uses earth's surface transient excitation, tapped using sledgehammer in aperture horizontal direction
The high seismic wave of the shear plate excitation shearing wave component accounting of upper ballast, is examined using the three-component for being placed on designated depth in hole
Wave device and wave velocity testing instrument receive ground exciting, are transferred to the seismic wave in hole by stratum media, using wave in focus and inspection
The distance between wave device and propagation time calculate stratum shear wave velocity.But it is this using earth's surface transient excitation mode, work as hole depth
Larger or rock-soil layer is harder, and the energy of earth's surface exciting may be unable to satisfy the test request of deep measuring point, or when drilling is located at
Waters, impenetrably table taps excitation shearing wave, leads to not the test for carrying out shearing wave.
Utility model content
The purpose of this utility model is to provide vibration excitor and test devices in a kind of hole of steady state shearing wave test, with solution
Certainly existing in the prior art to use earth's surface transient excitation, when hole depth is larger or rock-soil layer is harder, the energy of earth's surface exciting may
It is unable to satisfy the test request of deep measuring point, or when drilling is located at waters, impenetrably table taps excitation shearing wave, causes
The technical issues of can not carrying out the test of shearing wave.
Stable state provided by the embodiment of the utility model that in order to achieve the above purposes, the technical solution adopted by the utility model is:
Vibration excitor includes shell, stable state exciting device and wall attaching device in the hole of shearing wave test；
The stable state exciting device includes silicon steel sheet frame, electromagnetic coil and vibration head, and the silicon steel sheet frame is fixed on
The shell is horizontally mounted in hole, and the electromagnetic coil accesses half-wave ac signal, the silicon steel sheet frame and the electricity
Magnetic coil constitutes the static part of vibration excitor in hole together with the shell；The vibration head and the silicon steel sheet frame pass through bullet
Property component connection, the vibration head makes by soft magnetic materials, is horizontally mounted at the aperture in hole positioned at described, and the vibration head is institute
State the moving part of vibration excitor in hole；
The both ends of shell are arranged in the wall attaching device.
Further, the wall attaching device includes two adherent mechanisms for being symmetricly set on the shell end, the patch
Wall mechanism includes electric pushrod, reset spring, support wall bar；
On the housing, the support member that the support wall bar is arranged by middle part is rotatable for the electric pushrod setting
It is fixed on the side wall of the shell, one end of the support wall bar is connect with the electric pushrod, the other end of the support wall bar
It is connect with the shell by the reset spring.
Further, the electromagnetic coil is enameled wire electromagnetic coil.
Further, the side wall of the silicon steel sheet frame and the mounting hole is bolted.
Further, the shell is cylindrical type.
Further, the diameter of the shell is less than bore diameter.
Further, the elastomeric element is rubber spring or metal spring.
On the other hand, the utility model embodiment also provides a kind of steady state shearing wave test device, including above-mentioned stable state
Vibration excitor in the hole of shearing wave test, further includes wave detector, AC signal generator, power amplifier, half-wave rectification block, wave
Fast tester and wall attaching device control switch；
Vibration excitor, wave detector are placed in drilling in the steady state shearing wave instrument connection, the steady state shearing wave instrument connection
Interior vibration excitor, the wave detector are electrically connected with the shear wave velocity testing instrument respectively；
The AC signal generator is electrically connected with the power amplifier, the power amplifier and the halfwave rectifier
Module electrical connection, the half-wave rectification block are electrically connected with the electromagnetic coil；
The wall attaching device control switch is electrically connected with the wall attaching device.
Further, the quantity of the wave detector is two.
Further, the wave detector is equipped with the wall attaching device.
The beneficial effect of vibration excitor is in steady state shearing wave instrument connection provided by the utility model: with prior art phase
Than vibration excitor includes shell, stable state exciting device and wall attaching device, the stable state in the utility model steady state shearing wave instrument connection
Exciting device includes silicon steel sheet frame, electromagnetic coil and vibration head, and the silicon steel sheet frame is fixed on the horizontal peace of the shell
It fills in hole, the electromagnetic coil accesses half-wave ac signal, the silicon steel sheet frame and the electromagnetic coil and the shell
The static part of vibration excitor in hole is constituted together, and the vibration head is connect with the silicon steel sheet frame by elastomeric element, described
Vibration head is horizontally mounted at the aperture in hole described in being located at, and the vibration head is the moving part of vibration excitor in the hole, the patch
The both ends of shell are arranged in wall device, and electromagnetic coil accesses the magnetic field that half-wave ac signal generates mechanical periodicity, become in the period
Vibration head moves back and forth under the action of the magnetic field of change and elastomeric element, exciting borehole wall, and exciting goes out stratum and shears in drilling
Wave, to solve, hole depth is larger, rock-soil layer is harder or impenetrably table taps asking for excitation shearing wave when drilling is located at waters
Topic.
Detailed description of the invention
It, below will be to embodiment or the prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only that this is practical new
Some embodiments of type for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram of vibration excitor in steady state shearing wave instrument connection provided by the embodiment of the utility model；
Fig. 2 is the structural schematic diagram of steady state shearing wave test device provided by the embodiment of the utility model；
Fig. 3 is half-wave ac signal schematic diagram provided by the embodiment of the utility model.
Specific embodiment
In order to which technical problem to be solved in the utility model, technical solution and beneficial effect is more clearly understood, with
Lower combination accompanying drawings and embodiments, the present invention will be further described in detail.It should be appreciated that specific reality described herein
It applies example to be only used to explain the utility model, is not used to limit the utility model.
It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element
On one element or indirectly on another element.When an element is known as " being connected to " another element, it can
To be directly to another element or be indirectly connected on another element.
It is to be appreciated that term " length ", " width ", "upper", "lower", "front", "rear", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "top", "bottom" "inner", "outside" is that orientation based on the figure or position are closed
System, is merely for convenience of describing the present invention and simplifying the description, rather than the device or element of indication or suggestion meaning are necessary
It with specific orientation, is constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features." multiple ", " several " are meant that two in the description of the present invention,
It is a or more than two, unless otherwise specifically defined.
Referring to Fig. 1, existing be illustrated vibration excitor in a kind of hole of steady state shearing wave test provided by the utility model.
Vibration excitor in the steady state shearing wave instrument connection, comprising: shell 9, stable state exciting device 10 and wall attaching device 8.
Stable state exciting device includes silicon steel sheet frame 11, electromagnetic coil 13 and vibration head 15, and silicon steel sheet frame 11 is fixed on
Shell 9 is horizontally mounted in hole 91, and electromagnetic coil 13 accesses half-wave ac signal, silicon steel sheet frame 11 and electromagnetic coil 13 with
Shell 9 constitutes the static part of vibration excitor in hole together, and vibration head 15 is connect by elastomeric element 16 with silicon steel sheet frame 11, shaken
Dynamic head 15, which is located at, to be horizontally mounted at the aperture in hole 91, and vibration head 15 is the moving part of vibration excitor in hole, and the setting of wall attaching device 8 exists
The both ends of shell 9.
In the present embodiment, half-wave ac signal is as shown in Figure 3.15 material of vibration head can be soft magnetic materials and be made.
The both ends of shell 9 are arranged in wall attaching device 8, and wall attaching device 8 and vibration head are located at the symmetrical two sides of shell 9, and wall attaching device 8 is by pasting
The control of wall device control switch 700 is realized adherent.
Shell 9 is made of anticorrosion material.
Vibration excitor working principle is as follows in steady state shearing wave instrument connection provided by the utility model: electromagnetic coil accesses half-wave
Ac signal, silicon steel sheet frame and electromagnetic coil generate the magnetic field of mechanical periodicity under the action of half-wave ac signal, vibration
Dynamic head moves reciprocatingly to form vibration under the magnetic field of mechanical periodicity and the influencing each other of elastomeric element, while wall attaching device exists
Wall attaching device control switch 700 can be adherent so that vibration head touch borehole wall under controlling, vibration head exciting borehole wall,
Exciting goes out stratum shearing wave in drilling.
As can be seen from the above description, vibration excitor in steady state shearing wave instrument connection provided by the embodiment of the utility model, Neng Gou
Exciting goes out stratum shearing wave in drilling, can solve that hole depth is larger, rock-soil layer is harder or when drilling is located at waters impenetrably
Table taps the problem of excitation shearing wave.
Further, referring to Fig. 1, as steady state shearing wave provided by the utility model test hole in vibration excitor one
Kind specific embodiment, the wall attaching device 8 include two adherent mechanisms 17 for being symmetricly set on 9 end of shell, adherent mechanism
17 include electric pushrod 19, reset spring 18, support wall bar 21；
Electric pushrod 19 is arranged on shell 9, and support wall bar 21 is rotatably fixed by the support member 22 that middle part is arranged
On the side wall of shell 9, one end of support wall bar 21 is connect with electric pushrod 19, and the other end and shell 9 for supportting wall bar 21 pass through multiple
Position spring 18 connects.
Wherein, the one end for supportting wall bar 21 is connect with electric pushrod 19 by connecting rod 20.
When original state, wall bar is supportted by reset spring pulling force, is attached on vibration excitor shell；When electric pushrod receives control
Signal processed, electric pushrod are shunk, and support pulling force of the one end of wall bar by electric pushrod, and support wall bar expansion supports to borehole wall
On.
As can be seen from the above description, vibration excitor takes adherent manner in through hole, the energy of vibration excitor can be more intensively
It is applied on borehole wall, while effectively reducing the influence for the interference wave (such as Stoneley wave) propagated in water, improve survey
The reliability of trial signal.
Further, the electromagnetic coil 13 is enameled wire electromagnetic coil.
Further, the side wall of the silicon steel sheet frame 11 and mounting hole 91 is bolted.
Further, the shell 9 is cylindrical type, is put into drilling with facilitating.
Further, the diameter of the shell 9 is less than bore diameter.
Fig. 1 and Fig. 2 are please referred to, now a kind of steady state shearing wave test device provided by the utility model is illustrated.Institute
State for steady state shearing wave test test device include vibration excitor 100 in the hole of above-described embodiment, further include wave detector 200,
AC signal generator 300, power amplifier 400, half-wave rectification block 500, shear wave velocity measurement instrument 600 and wall attaching device control
Make switch 700.
Vibration excitor 100, wave detector 200 are placed in drilling in steady state shearing wave instrument connection, in steady state shearing wave instrument connection
Vibration excitor 100, wave detector 200 are electrically connected with shear wave velocity testing instrument 600 respectively.
AC signal generator 300 is electrically connected with power amplifier 400, power amplifier 400 and half-wave rectification block 500
Electrical connection, half-wave rectification block 500 are electrically connected with electromagnetic coil 13.
Wall attaching device control switch 700 is electrically connected with wall attaching device 8.Wherein wall attaching device control switch 700 is pushed away with electronic
Bar 19 is electrically connected, flexible for controlling electric pushrod 19.
In the present embodiment, solid by sound insulating material between vibration excitor 100, wave detector 200 in steady state shearing wave instrument connection
Fixed connection.
Further, the quantity of the wave detector 200 is two.
Further, the wave detector 200 is equipped with wall attaching device 8.
The working principle of steady state shearing wave test device provided by the utility model is as follows: AC signal generator output is handed over
Galvanic electricity signal is to power amplifier, the changeable frequency for the ac signal that wherein AC signal generator exports；Power amplifier
Processing is amplified to ac signal, and is output to half-wave rectification block, ac signal is after half-wave rectification block
The ac signal of output is as shown in Figure 3；Half-wave rectification block carries out halfwave rectifier processing to amplified ac signal, and
It is output to vibration excitor in hole；Vibration excitor produces in the earth formation according to the ac signal horizontal vibration after halfwave rectifier in the hole
Raw shearing wave signal；Wave detector receives shearing wave signal, and shear wave velocity testing instrument receives the shearing wave signal of wave detector, and root
Shear-wave velocity is calculated according to shearing wave signal.
Wherein, shear wave velocity testing instrument is existing shear wave velocity testing instrument.Such as when the quantity of wave detector 200 is
At two, method that shear wave velocity testing instrument calculates stratum shear-wave velocity according to shearing wave signal are as follows: two wave detectors
The time difference for receiving shearing wave signal is Δ t, and the distance of two wave detectors is L, then stratum shear-wave velocity Vs=L/ Δ t.
It should be understood that wave detector can be simple component wave detector or three-component geophone.Preferably, wave detector is single
Component piezoelectric acceleration transducer, preamplifier built in the piezoelectric acceleration transducer, high sensitivity, bandwidth.Hole
The sound insulating material being coupled between interior vibration excitor and wave detector, while guaranteeing the exciting of vibration excitor in the sensitive direction and hole of wave detector
Direction is consistent.Since vibration signal is faint, especially drill deep measuring point and lithostratigraphy, and the amplitude of vibration is very small, therefore makes
It is very necessary with highly sensitive sensor, it requires vibration frequency higher when lithostratigraphy is tested, needs sensor to have wider
Frequency band, in contrast, test request is more easily satisfied in piezoelectric acceleration transducer.Under the conditions of suitable, also it can be used
Sensitivity, frequency bandwidth meet the other kinds of wave detector of test request.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (10)
1. vibration excitor in a kind of steady state shearing wave instrument connection, which is characterized in that including shell, stable state exciting device and adherent dress
It sets；
The stable state exciting device includes silicon steel sheet frame, electromagnetic coil and vibration head, and the silicon steel sheet frame is fixed on described
Shell is horizontally mounted in hole, and the electromagnetic coil accesses half-wave ac signal, the silicon steel sheet frame and the electromagnetic wire
Circle constitutes the static part of vibration excitor in hole together with the shell；The vibration head and the silicon steel sheet frame pass through elastic portion
Part connection, the vibration head are made by soft magnetic materials, are horizontally mounted at the aperture in hole positioned at described, and the vibration head is the hole
The moving part of interior vibration excitor；
The both ends of shell are arranged in the wall attaching device.
2. vibration excitor in steady state shearing wave instrument connection as described in claim 1, which is characterized in that the wall attaching device includes two
A adherent mechanism for being symmetricly set on the shell end, the adherent mechanism include electric pushrod, reset spring, support wall bar；
On the housing, the support member that the support wall bar is arranged by middle part is rotatably fixed for the electric pushrod setting
On the side wall of the shell, one end of the support wall bar is connect with the electric pushrod, the other end of the support wall bar and institute
Shell is stated to connect by the reset spring.
3. vibration excitor in steady state shearing wave instrument connection as described in claim 1, which is characterized in that the electromagnetic coil is enamel-cover
Line electromagnetic coil.
4. vibration excitor in steady state shearing wave instrument connection as described in claim 1, which is characterized in that the silicon steel sheet frame and institute
The side wall for stating mounting hole is bolted.
5. vibration excitor in steady state shearing wave instrument connection as described in claim 1, which is characterized in that the shell is cylindrical type.
6. vibration excitor in steady state shearing wave instrument connection as claimed in claim 5, which is characterized in that the diameter of the shell is less than
Bore diameter.
7. vibration excitor in steady state shearing wave instrument connection as described in claim 1, which is characterized in that the elastomeric element is rubber
Spring or metal spring.
8. a kind of steady state shearing wave test device, which is characterized in that cut including stable state as described in any one of claim 1 to 7
Vibration excitor in the hole of wave test is cut, further includes wave detector, AC signal generator, power amplifier, half-wave rectification block, velocity of wave
Tester and wall attaching device control switch；
Vibration excitor, wave detector are placed in drilling in the steady state shearing wave instrument connection, are swashed in the steady state shearing wave instrument connection
Vibration device, the wave detector are electrically connected with the shear wave velocity testing instrument respectively；
The AC signal generator is electrically connected with the power amplifier, the power amplifier and the half-wave rectification block
Electrical connection, the half-wave rectification block are electrically connected with the electromagnetic coil；
The wall attaching device control switch is electrically connected with the wall attaching device.
9. steady state shearing wave test device as claimed in claim 8, which is characterized in that the quantity of the wave detector is two.
10. steady state shearing wave test device as claimed in claim 8, which is characterized in that the wave detector is equipped with described adherent
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820885309.7U CN208224505U (en) | 2018-06-07 | 2018-06-07 | Vibration excitor and test device in a kind of steady state shearing wave instrument connection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820885309.7U CN208224505U (en) | 2018-06-07 | 2018-06-07 | Vibration excitor and test device in a kind of steady state shearing wave instrument connection |
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| Publication Number | Publication Date |
|---|---|
| CN208224505U true CN208224505U (en) | 2018-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820885309.7U Expired - Fee Related CN208224505U (en) | 2018-06-07 | 2018-06-07 | Vibration excitor and test device in a kind of steady state shearing wave instrument connection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110426732A (en) * | 2019-08-02 | 2019-11-08 | 中铁第四勘察设计院集团有限公司 | A kind of seismic source apparatus and its control method of sound wave gaging hole |
-
2018
- 2018-06-07 CN CN201820885309.7U patent/CN208224505U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110426732A (en) * | 2019-08-02 | 2019-11-08 | 中铁第四勘察设计院集团有限公司 | A kind of seismic source apparatus and its control method of sound wave gaging hole |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181211 |
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| CF01 | Termination of patent right due to non-payment of annual fee |