CN213986856U - In-hole excitation type wave velocity tester - Google Patents
In-hole excitation type wave velocity tester Download PDFInfo
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- CN213986856U CN213986856U CN202023093787.0U CN202023093787U CN213986856U CN 213986856 U CN213986856 U CN 213986856U CN 202023093787 U CN202023093787 U CN 202023093787U CN 213986856 U CN213986856 U CN 213986856U
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Abstract
The utility model relates to the technical field of wave velocity testers, and discloses a hole excitation type wave velocity tester which mainly comprises a host, a transverse wave signal automatic acquisition system and a probe; the host is in data connection with the automatic transverse wave signal acquisition system and controls the probe; the probe consists of four parts, including a cable, an excitation source, two-stage vibration dampers and a plurality of transverse wave sensors, wherein the excitation source, the two-stage vibration dampers and the plurality of transverse wave sensors are sequentially connected in series on the cable in a bead shape; the host machine automatically collects transverse wave signals from the plurality of transverse wave sensors through the automatic transverse wave signal collecting system, and calculates the transverse wave speed according to the distance between two transverse wave sensors. Compared with the prior art, the utility model discloses changed and received the traditional measuring mode of artifical interpretation in the round trip ground hitting hole, realized arousing in the hole and received (in the hole from arousing to receive) automatic interpretation, the transverse wave speed of the measured soil horizon of instant display.
Description
Technical Field
The utility model relates to a wave speed tester technical field, more specifically the excitation type wave speed tester in hole that says so relates to.
Background
The shear wave velocity is an important parameter reflecting the wave propagation capacity of the medium and the dynamic characteristics of the soil body, and the shear wave velocity index of the soil layer is widely applied in engineering practice and is clearly explained in the current specification. At present, the conventional measurement method is to generate a shear wave with uncontrollable frequency, phase and amplitude by transient excitation, blasting, hammering and the like, and estimate the time difference between the initial motion moment of a measuring point and the sending moment of the shear wave to estimate the shear wave velocity of the rock-soil layer. The time difference error obtained by the transient excitation method is large, automatic interpretation cannot be carried out, and the transverse wave velocity is displayed in real time.
Therefore, in order to solve the above problems, it is an urgent need to solve the problems by those skilled in the art to provide an in-hole excitation type wave velocity tester.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an excitation type wave velocity tester in hole has effectively solved above-mentioned problem.
In order to achieve the above object, the utility model provides a following technical scheme:
an in-hole excitation type wave velocity tester mainly comprises a host, a transverse wave signal automatic acquisition system and a probe; the host is in data connection with the automatic transverse wave signal acquisition system and controls the probe; the probe consists of four parts, including a cable, an excitation source, two-stage vibration dampers and a plurality of transverse wave sensors, wherein the excitation source, the two-stage vibration dampers and the plurality of transverse wave sensors are sequentially connected in series on the cable in a bead shape; the host machine automatically collects transverse wave signals from the plurality of transverse wave sensors through the automatic transverse wave signal collecting system, and calculates the transverse wave speed according to the distance between two transverse wave sensors.
Preferably, in the above in-hole excitation type wave velocity tester, the host sends out an instruction manually to drive the excitation source to excite vibration, the soil layer near the excitation source vibrates, and the host automatically collects the transverse wave signal from the transverse wave sensor and automatically stores related original data and processing results.
Preferably, in the above-mentioned hole excitation type wave velocity tester, the probe is provided with at least two shear wave sensors, and the shear wave velocity can be measured by knowing the distance between the shear wave sensors.
Preferably, in the above in-hole excitation type wave velocity tester, the host performs correlation processing on the two transverse wave signals, and calculates a first arrival time difference Δ t (sec) of the two transverse wave signals; given a distance S of 1 m between two shear wave sensors, the velocity V of the shear wave is S ÷ Δ t (meters per second).
Preferably, in the above in-hole excitation type wave velocity tester, the interior of the excitation source is composed of an excitation coil, a reset coil and a columnar magnet; the exciting coil is horizontally impacted by a direct current pulse signal magnet to form vibration; after the signals are collected, the host automatically supplies direct current pulse signals to the reset coil, and the magnet automatically resets to wait for the next excitation.
Preferably, in the above in-hole excitation type wave velocity tester, the two-stage vibration damper is a common metal block, and blocks the vibration signal of the excitation source from the transverse wave sensor by using the inertia principle, so as to ensure that the transverse wave sensor receives the soil layer propagation signal.
According to the technical scheme, compare with prior art, the utility model discloses changed and to have received artifical interpretation's traditional measuring mode in the ground knocking hole with round trip, realized arousing in the hole and receive (in the hole from arousing to receive) automatic interpretation, the transverse wave velocity of the measured soil horizon of instant display.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic structural diagram of the probe of the present invention;
the attached drawing of fig. 3 is the work flow schematic diagram of the present invention.
In the figure: 1. a host; 2. a probe; 3. a cable; 4. exciting a seismic source; 5. a two-stage vibration damper; 6. a transverse wave sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-3, the in-hole excitation type wave velocity tester disclosed by the present invention mainly comprises a main machine 1, an automatic transverse wave signal acquisition system, and a probe 2; the host 1 is in data connection with an automatic transverse wave signal acquisition system and controls the probe 2; the probe 2 consists of four parts, including a cable 3, an excitation source 4, a two-stage vibration damper 5 and a plurality of transverse wave sensors 6, wherein the excitation source 4, the two-stage vibration damper 5 and the plurality of transverse wave sensors 6 are sequentially connected in series on the cable 3 in a bead shape; the host 1 automatically collects the transverse wave signals from the plurality of transverse wave sensors 6 through an automatic transverse wave signal collecting system, and calculates the transverse wave speed according to the distance between two transverse wave sensors 6.
Preferably, in the above in-hole excitation type wave velocity tester, the host 1 manually sends out an instruction to drive the excitation source 4 to vibrate, the soil layer near the excitation source 4 vibrates, and the host 1 automatically acquires the transverse wave signal from the transverse wave sensor 6 and automatically stores the related original data and the processing result.
Preferably, in the above-mentioned hole excitation type wave velocity measuring instrument, the probe 2 is provided with at least two shear wave sensors 6, and the shear wave velocity can be measured by knowing the distance between the shear wave sensors 6.
Preferably, in the above in-hole excitation type wave velocity tester, the host 1 performs correlation processing on the two transverse wave signals, and calculates a first arrival time difference Δ t (sec) of the two transverse wave signals; given a spacing S of 1 meter between two shear wave sensors 6, the shear wave velocity V is S ÷ Δ t (meters per second).
Preferably, in the above in-hole excitation type wave velocity tester, the excitation source 4 is internally composed of an excitation coil, a reset coil and a columnar magnet; the exciting coil is horizontally impacted by a direct current pulse signal magnet to form vibration; after the signals are collected, the host 1 automatically supplies direct current pulse signals to the reset coil, and the magnet automatically resets to wait for the next excitation.
Preferably, in the above in-hole excitation type wave velocity tester, the two-stage vibration damper 5 is a common metal block, and it blocks the vibration signal of the excitation source 4 from the transverse wave sensor 6 by using the inertia principle, so as to ensure that the transverse wave sensor 6 receives the soil layer propagation signal.
The working process is as follows: the pulse current is supplied by the power supply, so that the electromagnetic shock source 4 is excited to generate P, S waves propagating along the borehole wall stratum, the transverse wave sensor 6 receives the vibration signals of the waves and converts the vibration signals into electric signals, then transmitted to a pre-amplifying and filtering part of the instrument, firstly amplified by variable gain to achieve enough signal-to-noise ratio, then filtered (high-low pass, harmonic suppression, etc.), and the multi-channel synchronous pulse signal is amplified to the range of amplitude required by the A/D converter, and is quantized (digitalized) by the high-speed successive approximation A/D converter and converted into corresponding digital signal, the signals are controlled by the host 1 in a unified way, the selection and control of various functions are realized through a logic control circuit, the digitalized data is stored in the hard disk of the host 1 according to a specified format, and simultaneously, displaying the original waveform curve and the analyzed and processed result on a display screen of the host 1.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. An in-hole excitation type wave velocity tester is characterized by mainly comprising a host, a transverse wave signal automatic acquisition system and a probe; the host is in data connection with the automatic transverse wave signal acquisition system and controls the probe; the probe consists of four parts, including a cable, an excitation source, two-stage vibration dampers and a plurality of transverse wave sensors, wherein the excitation source, the two-stage vibration dampers and the plurality of transverse wave sensors are sequentially connected in series on the cable in a bead shape; the host machine automatically collects transverse wave signals from the plurality of transverse wave sensors through the automatic transverse wave signal collecting system, and calculates the transverse wave speed according to the distance between two transverse wave sensors.
2. The borehole excitation type wave velocity tester as recited in claim 1, wherein the host computer sends out an instruction manually to drive the excitation source to vibrate, the soil layer near the excitation source vibrates, the host computer automatically collects the transverse wave signal from the transverse wave sensor, and automatically stores the related original data and the processing result.
3. The apparatus of claim 1, wherein the probe has at least two shear wave sensors, and the shear wave velocity can be measured by knowing the distance between the shear wave sensors.
4. The in-hole excitation type wave velocity tester as claimed in claim 3, wherein the host machine performs correlation processing on the two transverse wave signals to calculate a first arrival time difference Δ t of the two transverse wave signals; when the distance S between two shear wave sensors is 1 meter, the velocity V of the shear wave is S ÷ Δ t.
5. The in-hole excitation type wave velocity tester as claimed in claim 1, wherein the excitation source is internally composed of an excitation coil, a reset coil and a columnar magnet; the exciting coil is communicated with a direct current pulse signal, and the magnet is horizontally impacted to form vibration; after the signals are collected, the host automatically supplies direct current pulse signals to the reset coil, and the magnet automatically resets to wait for the next excitation.
6. The in-hole excitation type wave velocity tester as claimed in claim 1, wherein the two-stage vibration damper is a metal block, which blocks the vibration signal of the excitation source from the transverse wave sensor by using the inertia principle, so as to ensure that the transverse wave sensor receives the soil layer propagation signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023093787.0U CN213986856U (en) | 2020-12-21 | 2020-12-21 | In-hole excitation type wave velocity tester |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023093787.0U CN213986856U (en) | 2020-12-21 | 2020-12-21 | In-hole excitation type wave velocity tester |
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| CN213986856U true CN213986856U (en) | 2021-08-17 |
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| CN202023093787.0U Active CN213986856U (en) | 2020-12-21 | 2020-12-21 | In-hole excitation type wave velocity tester |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116972954A (en) * | 2023-09-25 | 2023-10-31 | 山东省地震工程研究院 | Rock-soil wave velocity measurement method and device based on in-situ excitation |
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2020
- 2020-12-21 CN CN202023093787.0U patent/CN213986856U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116972954A (en) * | 2023-09-25 | 2023-10-31 | 山东省地震工程研究院 | Rock-soil wave velocity measurement method and device based on in-situ excitation |
| CN116972954B (en) * | 2023-09-25 | 2023-12-19 | 山东省地震工程研究院 | Rock-soil wave velocity measurement method and device based on in-situ excitation |
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