CN203465426U

CN203465426U - Piezoelectric type universal geophone

Info

Publication number: CN203465426U
Application number: CN201320523105.6U
Authority: CN
Inventors: 张朋; 强明明; 李建超; 牛小英
Original assignee: Xian Sitan Apparatus Co Ltd
Current assignee: Xian Sitan Apparatus Co Ltd
Priority date: 2013-08-26
Filing date: 2013-08-26
Publication date: 2014-03-05
Anticipated expiration: 2023-08-26

Abstract

The utility model relates to a piezoelectric type universal geophone. The piezoelectric type universal geophone comprises a housing, a double universal structure disposed in the housing, a geophone machine core and a matcher. The geophone machine core is fixedly disposed in the double universal structure, the geophone machine core is connected with the matcher, and the geophone machine core is a piezoelectric geophone machine core. The utility model provides the piezoelectric type universal geophone having high sensitivity and strong reliability.

Description

The universal wave detector of piezoelectric type

Technical field

The utility model belongs to passive detection technical field, relates to a kind of seismic prospecting wave detector, relates in particular to the universal wave detector of a kind of piezoelectric type.

Background technology

In geologic prospecting seismic signal, contain low-and high-frequency component.Wherein low frequency component is abundanter.In the process that signal is propagated in stratum, the energy loss of high fdrequency component is very fast, propagates far, and loss ratio is larger.High-frequency signal is more weak, more unfavorable to exploration stratigraphic resolution.At present, geology geophysical prospecting technology has been developed to high resolution exploration, and the bottleneck of high resolution exploration is mainly that the source of collection is wave detector for the collection of deep layer, thin layer high frequency weak signal.The wave detector that physical prospecting industry is used is mainly divided into velocity profile wave detector and acceleration type wave detector two classes.Velocity profile wave detector is identical to the ability to accept of low-and high-frequency component, and the serious high fdrequency component that decays is difficult for accepting.Acceleration type wave detector all has good ability to accept to low-and high-frequency signal, especially the acceptance of the serious high-frequency signal of decaying is had more to advantage.Acceleration type wave detector, can improve high-resolution exploration effect, can reflect sooner, more accurately the stratal configuration of detecting layer, realizes the high resolving power exploration of underground deep layer, shallow-layer, thin layer.

Existing universal wave detector is mainly that two or six moving-coil wave detectors use universal structures, and this universal wave detector is due to the reason of movement: the universal wave detector dynamic range of this class is little, and frequency band is narrow, and sensitivity is not high.

Utility model content

In order to solve the above-mentioned technical matters existing in background technology, the utility model provides a kind of piezoelectric type highly sensitive and that reliability is strong universal wave detector.

Technical solution of the present utility model is: the utility model provides a kind of piezoelectric type universal wave detector, comprises housing, is arranged on two universal structures, wave detector movement and the adaptation of enclosure interior; Described wave detector movement is fixedly installed in two universal structures; Described wave detector movement is connected with adaptation; Its special character is: described wave detector movement is piezoelectric seismometer movement.

Above-mentioned piezoelectric seismometer movement comprises inertial mass, piezoelectric ceramics and base; Described inertial mass, piezoelectric ceramics and base superpose successively and form one-piece construction from top to bottom; Described base is fixedly installed in two universal structures; Described piezoelectric ceramics is connected with adaptation.

The utility model has the advantages that:

The utility model provides a kind of piezoelectric type universal wave detector, the universal wave detector of this piezoelectric type is to utilize some strong dielectric crystal to receive after external force, its intramolecule produces polarization phenomena, make two surface produce the contrary electric charge of quantity equal symbol, produced electronic heat, the principle of work of piezoelectric seismometer for Here it is land, this wave detector has not only improved sensitivity and signal to noise ratio (S/N ratio), in reliability, be also greatly improved, particularly, the utlity model has following advantage:

1, the utility model has good acquisition capacity to the high frequency weak signal of deep layer, thin layer, can take into account low frequency signal again, and have enough bandwidth simultaneously, and bandwidth is 0～400Hz.2, the quality of coasting body and the high conformity of damping, therefore that the uniformity in waveform that sensor collects is lineups is good; The steady quality of coasting body, collects the high conformity of waveform; Damping is reasonable, and the aftershock of waveform is the requirement that " tail " meets exploration.3, adopt universal structure that piezoelectric seismometer movement is kept straight down at any time, guaranteed the correctness of signal.4, anti-electromagnetic field interference performance is strong.Movement is placed in the betal can of a sealing simultaneously, makes movement can protect preferably the outside various interference of electromagnetic field, the quality of collection signal is improved greatly.5, anti-mechanical interference performance is strong.The outer coated one deck urethane rubber cover of betal can, makes movement have good anti-mechanical interference performance and good impact resistance, has further improved the quality of collection signal.6, at output terminal of the present utility model, be connected with impedance transducer, can realize the long-distance transmissions of useful signal.7, the utility model is passive seismometer, without power supply is provided, and use that can be permanently effective.

Accompanying drawing explanation

Fig. 1 is the mechanical model schematic diagram of movement that the utility model adopts;

Fig. 2 is the structural model schematic diagram of movement that the utility model adopts;

Fig. 3 is the structural representation of the universal wave detector of piezoelectric type provided by the utility model;

Wherein:

1-piezoelectric seismometer movement; 2-adaptation; The two universal structures of 3-; 4-housing; 5-rubber waterproof protective case; 6-408 plug; 11-inertial mass; 12-piezoelectric ceramics; 13-base.

Embodiment

Referring to Fig. 3, the utility model provides a kind of piezoelectric type universal wave detector, comprises housing 4, is arranged on two universal structures 3, wave detector movement and the adaptation 2 of housing 4 inside; Wave detector movement is fixedly installed in two universal structures 3; Wave detector movement is connected with adaptation 2; The wave detector movement that the utility model adopts is piezoelectric seismometer movement 1.

Referring to Fig. 1 and Fig. 2, the piezoelectric seismometer movement 1 that the utility model adopts comprises inertial mass 11, piezoelectric ceramics 12 and base 13; Inertial mass 11, piezoelectric ceramics 12 and base 13 superpose successively and form one-piece construction from top to bottom; Base 13 is fixedly installed in two universal structures 3; Piezoelectric ceramics 12 is connected with adaptation 2.

Piezoelectric seismometer movement 1 is fixed in two universal structures, and two universal structures are the conventional various universal structures in this area, for example, can adopt the mode of large canoe.Piezoelectric seismometer movement 1 is fixed in canoe, and canoe is fixed on again in large ship, and the bicipital bearing fixed mount of large ship connects, and rear and front end is by two end cap end sockets, and last front end is drawn 1.5 rice noodles band 408 plugs 6 and formed; Two universal structures guarantee piezoelectricity movement straight down at any time, and O RunddichtringO sealing for front and rear cover and inner silicone oil effectively guarantees sealing.

Desirable wave detector both had good acquisition capacity to the high frequency weak signal of deep layer, thin layer, can take into account low frequency signal again, and had enough bandwidth, was generally 3～400Hz.The utility model i.e. design according to this: the quality of coasting body mass 11 and the high conformity of damping, can guarantee that the consistance of waveform that sensor collects is lineups; The quality of coasting body mass 11 is large, and the amplitude of the waveform that gathers is large; Piezoelectric seismometer movement 1 is in silicone oil, and damping is enough large, and the aftershock of the waveform that gathers i.e. " tail " is little.

The large ship of basic structure, canoe, bearing bracket stand that the utility model is simplified, top cover, rubber waterproof protective case 5, contact chip, line etc., piezoelectric seismometer movement 1 is the core of whole device.Its ultimate principle that detects seismic acceleration signal is: land is to utilize some strong dielectric crystal to receive after external force with piezoelectric seismometer movement, its intramolecule produces polarization phenomena, make two surface produce the contrary electric charge of quantity equal symbol, produced electronic heat, the land principle of work of piezoelectric seismometer that Here it is, take inertial mass 11 as medium medium, it is feedback that the inertial mass 11 of take presses potsherds 12 to produce voltage signals, then take adaptation 2 as signal amplifier by voltage, be output.When external vibration forces inertial mass 11 displacement, by inertial mass 11 compressing piezoelectric ceramics 12, produce voltage signal.Because the voltage producing depends on excitation signal, inertial mass 11, the change curve that therefore character of piezoelectric ceramics 12 and adaptation 2 control voltage is with regard to real-time follow-up external force change curve, whole movement is in a set of universal structure, so just formed a set of complete mechanical shock system, added that corresponding match circuit has just formed the universal acceleration detector of piezoelectric type.

Claims

1. the universal wave detector of piezoelectric type, comprises housing, is arranged on two universal structures, wave detector movement and the adaptation of enclosure interior; Described wave detector movement is fixedly installed in two universal structures; Described wave detector movement is connected with adaptation; It is characterized in that: described wave detector movement is piezoelectric seismometer movement.

2. the universal wave detector of piezoelectric type according to claim 1, is characterized in that: described piezoelectric seismometer movement comprises inertial mass, piezoelectric ceramics and base; Described inertial mass, piezoelectric ceramics and base superpose successively and form one-piece construction from top to bottom; Described base is fixedly installed in two universal structures; Described piezoelectric ceramics is connected with adaptation.