CN2118815U - Micro sound receiver - Google Patents
Micro sound receiver Download PDFInfo
- Publication number
- CN2118815U CN2118815U CN92207913U CN92207913U CN2118815U CN 2118815 U CN2118815 U CN 2118815U CN 92207913 U CN92207913 U CN 92207913U CN 92207913 U CN92207913 U CN 92207913U CN 2118815 U CN2118815 U CN 2118815U
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- piezoelectric ceramic
- ceramic body
- housing
- hole
- sound receiver
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Abstract
The utility model relates to a detector used for detecting sound wave and infrasound wave, particularly to a micro sound receiver used for measuring the echo of the depth of the liquid level of an oil well in oilfield production. The micro sound receiver is composed of a casing, a piezoelectric ceramic body and a leading wire. The micro sound receiver thoroughly eliminates the disadvantages that the existing micro sound receiver has greater pressure difference existing at both faces of a piezoelectric ceramic body in a hyperbaric environment, and the total amount of the pressure is in the state of weak pressure difference and is in the state of no pressure difference. The utility model has the advantages of wide suitable atmospheric pressure range, high sensitivity, long service life, simple structure, convenient processing and small volume.
Description
The utility model relates to a kind of sound wave and infrasound detects, particularly the microphony receiver that the oil-well level echo sounding is used in the field produces.
The common method of measuring oil well liquid level depth is: a branch of sound wave of emission in well, utilize the microphony receiver of well head to receive the interior treated level of obtaining of reflection echo of pit shaft.Because of well depth does not wait to several kms from hundreds of rice, in the well air pressure from zero point several MPas to tens MPa differences, so require the microphony receiver that very high sensitivity should be arranged, very wide pressure adaptation scope is arranged again, and this mutual contradiction often.
This class microphony receiver has two kinds both at home and abroad at present.A kind of is the Totally-enclosed-type made from the cylinder type piezoceramic material.Though the cartridge type hollow-core construction has strengthened anti-pressure ability, has avoided acoustic short circuit, sensitivity is not high, in hyperbaric environment, can cause sensitive decline, even damage because of pressure reduction outside the tube inner core is excessive, and cartridge type piezoceramic material processing difficulties, cost is higher.Another kind be with the chip-type piezoelectric ceramic materials of cheapness make type semienclosed.One admission valve and an outlet valve are arranged on its housing, the opening pressure of two valves has determined the difference of microphony receiver inner and outer air pressure, when so ambient pressure changes, inner and outer air pressure remains a fixing difference, and the faint air pressure change of burst is not enough to open air valve, avoid acoustic short circuit, so both made that piezoelectric ceramic body also is unlikely to be damaged in hyperbaric environment, and can keep higher sensitivity.But its structure is complicated, is difficult for reduced volume, and piezoelectric ceramic body is in one fixedly under the differential pressure action for a long time, influences its application life to a certain extent.
The purpose of this utility model is that a kind of improved microphony receiver will be provided, and it can thoroughly eliminate the inside and outside differential pressure of microphony receiver, can avoid acoustic short circuit again, and can both keep higher sensitivity in high hypobaric.
The purpose of this utility model is achieved in that and is provided with the hole that feeds the inner space or the pipe that has the hole is housed on cartridge type or chip-type piezoelectric ceramic body stationary housing, ambient pressure can act on the inside and outside two sides of piezoelectric ceramic body by the hole, can reach the equilibrium state of zero pressure difference, do not damage so can adapt to hyperbaric environment, but because of the damping action in hole, the effect that air pressure change is always compared outer wall to the effect of inwall postpones just to enter balance after of short duration time.The utility model utilizes formed faint pressure reduction of this of short duration time difference to promote the fluctuation situation that the signal of telecommunication that piezoelectric ceramic body produces reflects air pressure just.Change the size and the degree of depth in hole, can control the damping degree, piezoelectric ceramic body always is in the state of atomic weak pressure reduction and no pressure reduction, reach and to prevent that piezoelectric ceramic body from being damaged by hyperbar, can eliminate acoustic short circuit again, under different air pressure environment, keep highly sensitive purpose.
The utility model only needs to establish the hole of suitable size or load onto the pipe that has the hole on the stationary housing of piezoelectric ceramic body, can achieve the goal, so not only structure very between singly, also help reduced volume; Intake and exhaust simultaneously all thus the hole carry out, the variation of ambient pressure reaches the equilibrium state of zero pressure difference very soon through the of short duration excessive phase of faint inside and outside differential pressure, so no matter be cartridge type or chip-type piezoelectric ceramic body, in high hypobaric, can both keep high sensitivity, and not damage.
Concrete structure of the present utility model is provided by following embodiment and accompanying drawing.
Accompanying drawing 1 is the microphony receiver sectional drawing according to the hole that has on the housing that the utility model proposes.
Accompanying drawing 2 is according to the microphony receiver sectional drawing that damper tube is housed on the housing that the utility model proposes.
Describe details of the present utility model and operating principle in detail below in conjunction with Fig. 1, Fig. 2.
This microphony receiver comprises: housing (1), piezoelectric ceramic body (2), lead-in wire (3) and damper tube (4), but damper tube (4) can be used in hole (1a) replacement that housing (1) is directly made; It is characterized in that: constitute a closed space (A) by housing (1) and piezoelectric ceramic body (2) and be in communication with the outside by hole (1a) or the damper tube (4) that is contained on the housing (1).
The operating principle of this microphony receiver is: on the one hand since hole (1a) or damper tube (4) closed space (A) by housing (1) and piezoelectric ceramic body (2) formation has been in communication with the outside, so no matter how ambient pressure changes, the capital reaches the balance of inner and outer air pressure by hole (1a) or damper tube (4), two sides equipressure because of piezoelectric ceramic body (2), so can not damaged, can adapt to hyperbaric environment by hyperbar; On the other hand because hole (1a) or damper tube (4) have certain air resistance effect, in the inside and outside air pressure balance process, can produce an extremely of short duration time difference, thereby form an of short duration and faint draught head (especially to the flow perturbation sensitivity) on the inside and outside two sides of piezoelectric ceramic body (2), just enter equilibrium state subsequently.The utility model just by change aperture (1a) or damper tube (4) hole geometry control damping time, reach and to form certain inside and outside differential pressure in the short time at the utmost point of air pressure change, be unlikely to again in hyperbaric environment because of forming the purpose that excessive pressure reduction damages piezoelectric ceramic body (2), and promote the signal of telecommunication that piezoelectric ceramic body (2) produces reflection air pressure fluctuation situation by this of short duration and faint pressure reduction, and by lead (3) output, so piezoelectric ceramic body (2) always is in the atomic weak pressure reduction and no pressure reduction state, sensitivity is higher.
Claims (4)
1, a kind of sound wave and infrasound detect, the microphony receiver that the oil-well level echo sounding is used in the field produces particularly, comprise housing (1), piezoelectric ceramic body (2) and lead-in wire (3), it is characterized in that: by the hole (1a) on damper tube (4) or the housing space (A) is in communication with the outside, and damper tube (4) can be used in hole (1a) replacement of directly making on the housing (1).
2, microphony receiver according to claim 1 is characterized in that: the damper tube (4) that the air damping effect has been housed on the housing (1).
3, microphony receiver according to claim 1 and 2 is characterized in that: damper tube (4) can be had hole (1a) replacement of air damping effect equally by a processing on housing (1).
4, microphony receiver according to claim 1 and 2 is characterized in that: damper tube (4) or hole (1a) connect unique passage extraneous and closed space (A) that is made of housing (1) and piezoelectric ceramic body (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92207913U CN2118815U (en) | 1992-04-27 | 1992-04-27 | Micro sound receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92207913U CN2118815U (en) | 1992-04-27 | 1992-04-27 | Micro sound receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2118815U true CN2118815U (en) | 1992-10-14 |
Family
ID=4953528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN92207913U Granted CN2118815U (en) | 1992-04-27 | 1992-04-27 | Micro sound receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2118815U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101571042B (en) * | 2009-06-04 | 2012-07-25 | 付吉平 | Continuous remote telemetering method for liquid levels of oil wells |
-
1992
- 1992-04-27 CN CN92207913U patent/CN2118815U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101571042B (en) * | 2009-06-04 | 2012-07-25 | 付吉平 | Continuous remote telemetering method for liquid levels of oil wells |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Wang Zemin Document name: payment instructions |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |