CN101806920A - Ultra-wide band seismic prospecting detector - Google Patents
Ultra-wide band seismic prospecting detector Download PDFInfo
- Publication number
- CN101806920A CN101806920A CN 201010179041 CN201010179041A CN101806920A CN 101806920 A CN101806920 A CN 101806920A CN 201010179041 CN201010179041 CN 201010179041 CN 201010179041 A CN201010179041 A CN 201010179041A CN 101806920 A CN101806920 A CN 101806920A
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- China
- Prior art keywords
- amplifier
- piezoelectric crystal
- lead
- detector
- sleeve
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The invention relates to an ultra-wide band seismic prospecting detector. A piezoelectric crystal with a through hole manufactured in the middle is installed inside a bottom opening of a metal sleeve; a metal substrate with an annular lug in the middle is encapsulated on the opening of the sleeve and spliced with the piezoelectric crystal; the annular lug of the substrate is embedded in the middle through hole of the piezoelectric crystal; an integration circuit amplifier provided with a charge amplifier at the front end and an impedance conversion circuit at the rear end is installed on the inner wall of the sleeve, wherein the charge amplifier is connected with the piezoelectric crystal by a piezoelectric crystal lead, the impedance conversion circuit is connected to a signal receiver through an amplifier lead, and the amplifier is connected with an external power supply with an additional power lead. The used frequency range of the detector is not near the inherent vibration frequency of the detector and is far away from the inherent frequency range, and therefore, the sensitivity of various vibration frequencies can be consistent in the used frequency range. In order to improve the sensitivity of the detector, the integration circuit amplifier is arranged in the detector, thereby the purpose that no suppress exists in the broadband range or a certain frequency is especially amplified for picking up the seism is achieved.
Description
Technical field
A kind of seismic prospecting detector of ultrabroad band the present invention relates to the ultra broadband wave detector that a kind of seismic prospecting is used, and belongs to the wave detector technical field.
Background technology
The wave detector that comes into operation at present has two classes, and a class is an inductor, utilizes the displacement of wave detector when receiving seismic event to drive a coil cutting magnetic line, makes and produces induction electromotive force in the coil, reaches the reception main frame by lead; Another kind is to adopt piezoelectric crystal, and piezoelectric crystal produces electric charge when wave detector receives vibrations, passes to the reception main frame by lead, has higher sensitivity in the frequency range of setting.But this two classes wave detector all is a natural frequency of utilizing it, and wave detector has higher sensitivity near natural frequency, and this has been the rule or the general knowledge of wave detector industry.Therefore, no matter be any wave detector, all be frequency range is narrower.Physical prospecting circle for many years is all in the frequency of managing to improve seismic acquisition.
Summary of the invention:
The objective of the invention is to overcome the narrower shortcoming of original wave detector manufacturing technology Mid Frequency, a kind of ultrabroad band is provided and can in this frequency band, suppress or give prominence to especially the wave detector that amplifies a certain frequency.
The present invention is achieved in that ultra-wide band seismic prospecting detector, the acceleration type wave detector that adopts piezoelectric crystal to make, select for use away from the frequency range of wave detector natural frequency reception frequency range as wave detector, this is away from the receiver section of natural frequency, the sensitivity that can remain on wave detector in the frequency range of acceptance is consistent, promptly not to the wave pressure system or the amplification of arbitrary frequency range.The present invention installs an amplifier in wave detector, the piezoelectric charge brought from piezoelectric crystal is amplified, and carry out impedance conversion output potential difference and lead to the receiving instrument main frame, can make the highly sensitive in the wave detector of routine of wave detector.
Chao Kuan Frequency band seismic prospecting detector of the present invention is made of piezoelectric crystal, metal sleeve, metal base, integrated amplifier, piezoelectric crystal lead, amplifier lead and power lead, in the inside of metal sleeve bottom end opening a piezoelectric crystal that is shaped on middle open-work is installed, the metal base that the centre is shaped on ring-shaped lug is encapsulated on the sleeve openings, and bonding with piezoelectric crystal, the ring-shaped lug in the middle of the metal base is inlaid in the middle open-work of piezoelectric crystal; Install on the sleeve lining and comprise that front end is that charge amplifier and rear end are the integrated amplifier of impedance inverter circuit output potential difference, the charge amplifier of amplifier front end is connected with the piezoelectric crystal lead with piezoelectric crystal, the impedance inverter circuit of amplifier rear end is connected to the amplifier lead on the signal receiver of peripheral hardware, and amplifier is connected with external power source with power lead in addition.
Advantage of the present invention is:
1. can the wide ultrabroad band that reaches 5000Hz～10000Hz of frequency acceptance band;
2. in the band limits that wave detector receives, do not suppress or a certain frequency of outstanding especially amplification, realize that perfect information receives;
3. high sensitivity is arranged, and the amplifier of information in placing wave detector amplifies through lead output again, can transmit hundreds of rice distance and keeps being received the intensity that main frame receives.
Description of drawings
Fig. 1 looks synoptic diagram for the master of wave detector;
Fig. 2 is the schematic top plan view of wave detector;
Fig. 3 is the cross-sectional schematic of wave detector;
Fig. 4 is the family curve of wave detector.
Among the figure:
1, piezoelectric crystal; 2, metal sleeve; 3, metal base;
4 integrated amplifiers;
5,6, piezoelectric crystal lead;
7,8, amplifier lead;
9, power lead;
F, frequency; f
0, piezoelectric crystal vibration natural frequency;
DB, enlargement factor; The frequency range of M, N, sensitivity unanimity;
Embodiment:
As Fig. 1,2, shown in 3, the present invention is by piezoelectric crystal (1), metal sleeve (2), metal base (3), integrated amplifier (4), piezoelectric crystal lead (5,6), amplifier lead (7,8) and power lead (9) constitute, in the inside of metal sleeve bottom end opening a piezoelectric crystal (1) that is shaped on middle open-work is installed, the metal base (3) that the centre is shaped on ring-shaped lug is encapsulated on the opening of sleeve (2) mutually bonding with piezoelectric crystal (1), be inlaid on the ring-shaped lug in the middle of the metal base (3) in the middle open-work on the piezoelectric crystal (1), install on the sleeve lining and comprise that front end is that charge amplifier and rear end are the integrated amplifier (4) of impedance inverter circuit output potential difference, the charge amplifier of amplifier (4) front end and piezoelectric crystal (1) piezoelectric crystal lead (5,6) be connected, the impedance inverter circuit of amplifier (4) rear end amplifier lead (7,8) be connected on the receiver of peripheral hardware, and link to each other with external power source with power lead (9).
Shown in Figure 4 is the frequency-sensitivity curve of piezoelectric crystal wave detector, f
0Be the natural frequency of piezoelectric crystal (1), the line segment of M, N point-to-point transmission is away from wafer vibration natural frequency f
0The family curve section, the sensitivity of this section is lower than f
0The front and back section still to the sensitivity unanimity of different frequency, is neither amplified, and does not also suppress any frequency.The amplifier of integrated circuit is consistent with the frequency of this section frequency range.From the frequency characteristic of this wave detector as seen, do not suppress and do not amplify the ripple of arbitrary frequency, have the characteristic of ultra broadband perfect information at the wide wave detector that reaches in thousands of Hz scopes.Receive wide band ripple, can differentiate different reflecting bodys, can excise the interference wave of some frequency range by frequency spectrum.
Claims (1)
1. ultra-wide band seismic prospecting detector, by piezoelectric crystal, metal sleeve, metal base, integrated amplifier, the piezoelectric crystal lead, amplifier lead and power lead constitute, it is characterized in that: a piezoelectric crystal that is shaped on middle open-work is installed in the inside of metal sleeve bottom end opening, the metal base that the centre is shaped on ring-shaped lug is encapsulated on the opening of sleeve and is bonding with piezoelectric crystal, ring-shaped lug in the middle of the metal base is inlaid in the middle open-work on the piezoelectric crystal, install on the sleeve lining and comprise that front end is that charge amplifier and rear end are the integrated amplifier of impedance inverter circuit output potential difference, the charge amplifier of amplifier front end is connected with the piezoelectric crystal lead with piezoelectric crystal, the impedance inverter circuit of amplifier rear end is connected to the amplifier lead on the signal receiver of peripheral hardware, and amplifier is connected with external power source with power lead in addition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010179041 CN101806920A (en) | 2010-05-21 | 2010-05-21 | Ultra-wide band seismic prospecting detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010179041 CN101806920A (en) | 2010-05-21 | 2010-05-21 | Ultra-wide band seismic prospecting detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101806920A true CN101806920A (en) | 2010-08-18 |
Family
ID=42608792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010179041 Pending CN101806920A (en) | 2010-05-21 | 2010-05-21 | Ultra-wide band seismic prospecting detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101806920A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5889731A (en) * | 1995-05-04 | 1999-03-30 | Institut Francais Du Petrole | Vibration detector |
| CN201319073Y (en) * | 2008-12-09 | 2009-09-30 | 重庆地质仪器厂 | 2HZ detector core body |
| CN201716424U (en) * | 2010-07-16 | 2011-01-19 | 钟世航 | High resolution geophone in seismic prospecting |
-
2010
- 2010-05-21 CN CN 201010179041 patent/CN101806920A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5889731A (en) * | 1995-05-04 | 1999-03-30 | Institut Francais Du Petrole | Vibration detector |
| CN201319073Y (en) * | 2008-12-09 | 2009-09-30 | 重庆地质仪器厂 | 2HZ detector core body |
| CN201716424U (en) * | 2010-07-16 | 2011-01-19 | 钟世航 | High resolution geophone in seismic prospecting |
Non-Patent Citations (1)
| Title |
|---|
| 《地质装备》 20060228 易碧金等 地震压电检波器及其测试仪原理与测试方法 32-35 1 第7卷, 第1期 2 * |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100818 |