DK143523B - RECEIVING ISAs TO SEISMIC BALLS WITH LONG LENGTH AND CONTINUOUS BUILDING - Google Patents
RECEIVING ISAs TO SEISMIC BALLS WITH LONG LENGTH AND CONTINUOUS BUILDING Download PDFInfo
- Publication number
- DK143523B DK143523B DK293577AA DK293577A DK143523B DK 143523 B DK143523 B DK 143523B DK 293577A A DK293577A A DK 293577AA DK 293577 A DK293577 A DK 293577A DK 143523 B DK143523 B DK 143523B
- Authority
- DK
- Denmark
- Prior art keywords
- isas
- receiving
- long length
- electrode
- continuous building
- Prior art date
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/20—Arrangements of receiving elements, e.g. geophone pattern
- G01V1/201—Constructional details of seismic cables, e.g. streamers
- G01V1/208—Constructional details of seismic cables, e.g. streamers having a continuous structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/0292—Electrostatic transducers, e.g. electret-type
Description
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Den foreliggende opfindelse angår en modtager, især til seismiske bølger, med stor længde og kontinuert opbygning omfattende mindst én følsom enhed forsynet med to ledende elektroder anbragt på hver sin side af et deformerbart 5 element, som har en permanent elektrisk polarisation (elek-tret) og et sammentrykkeligt og elektrisk isolerende element, som er indrettet til at undergå væsentlige volumenændringer i afhængighed af udøvede påvirkninger. Fra patentansøgning nr. 2177/75 kendes en modtager af denne art. lo Det deformerbare element er udført f.eks. af et ma teriale af elektrettypen. Dette materiale kan f.eks. tilvejebringes ved at polarisere bånd med en tykkelse på mellem 8 og 25 mikron og udført af et plastmateriale af poly-propylentypen, polytetrafluorethylen, polyethylenterephtha-15 lat osv. Denne polarisation opnås ved elektronisk bombardement, ved påtrykning af et elektrisk felt, idet materialet opvarmes til i nærheden af sit blødgøringspunkt, ved coro-naeffekt, ultraviolet bestråling osv.The present invention relates to a receiver, particularly for large-length seismic waves, of continuous construction, comprising at least one sensitive unit provided with two conductive electrodes disposed on each side of a deformable element having a permanent electric polarization (electric) and a compressible and electrically insulating member adapted to undergo significant volume changes as a result of exerted effects. From patent application No. 2177/75 a recipient of this kind is known. lo The deformable element is made e.g. of a material of the electret type. This material can e.g. is provided by polarizing bands of 8 to 25 microns in thickness and made of a polypropylene-type plastic material, polytetrafluoroethylene, polyethylene terephthalate, etc. This polarization is achieved by electronic bombardment, by application of an electric field as the material is heated to near its softening point, by corona effect, ultraviolet radiation, etc.
Den følsomme enhed er udført ved successiv stabling 2o af et metalbånd eller en metalfletning, der danner en første elektrode, et sammentrykkeligt element udført af et elektrisk isolerende materiale i form af et regelmæssigt perforeret eller vævet bånd og en metalfolie, som danner en anden elektrode.The sensitive unit is formed by successive stacking 20 of a metal band or metal braid forming a first electrode, a compressible element made of an electrically insulating material in the form of a regular perforated or woven band, and a metal foil forming a second electrode.
25 Når påvirkninger udøves på den følsomme enhed, vil metalfolien og elektretfolien deformeres og ændre afstanden mellem elektroderne. Det elektriske felt, som frembringes permanent af elektretfolien, inducerer således en potentialforskel mellem elektroderne.25 When stresses are exerted on the sensitive unit, the metal foil and electret foil will deform and change the distance between the electrodes. Thus, the electric field produced permanently by the electret foil induces a potential difference between the electrodes.
3o Elektretfolien opfylder i dette arrangement en dob belt funktion, dels at frembringe et elektrisk felt, og dels at overføre mekaniske deformationer.In this arrangement, the electret foil fulfills a dual function, partly to produce an electric field and partly to transmit mechanical deformations.
Det har vist sig, at visse materialer, som anvendes ved fremstillingen af elektretfolien, f.eks. polyte-35 trafluorethylen, har mekaniske egenskaber, som er utilstrækkelige til pålideligt at overføre de mekaniske påvirkninger, som de udsættes for.It has been found that certain materials used in the manufacture of the electret film, e.g. polythrafrafluoroethylene, has mechanical properties which are insufficient to reliably transfer the mechanical stresses to which they are subjected.
143523 2143523 2
Ved visse udførelsesformer er metalfolien/ som danner den anden elektrode, udført i form af en belægning påført under vakuum på overfladen af elektretfolien.In certain embodiments, the metal foil / forming the second electrode is made in the form of a coating applied under vacuum to the surface of the electret foil.
Det har ligeledes vist sig, at en metallisering af 5 overfladen af visse dielektriske folier forringer de elektriske egenskaber af materialer ved diffusion af metalioner, eksempelvis under metalliseringen under vakuum. Anvendelsen af elektretfolier, der ikke er metalliserede, er således at foretrække.It has also been found that a metallization of the surface of certain dielectric foils degrades the electrical properties of materials by diffusion of metal ions, for example during the metallization under vacuum. The use of non-metallized electrolyte foils is thus preferred.
lo Formålet med den foreliggende opfindelse er at und gå de ovennævnte ulemper.The object of the present invention is to avoid the above-mentioned disadvantages.
Dette opnås ifølge opfindelsen ved, at den ene af elektroderne i den følsomme enhed danner en lokalt ikke-deformerbar understøtning for det deformerbare element, 15 og at det sammentrykkelige element er anbragt mellem det deformerbare element og den anden elektrode, der består af en tynd bøjelig folie.This is achieved according to the invention in that one of the electrodes in the sensitive unit forms a local non-deformable support for the deformable element, and the compressible element is arranged between the deformable element and the other electrode consisting of a thin flexible foil.
Den anden elektrode kan være helt af metal eller 2o bestå af en metalbelægning på den ene af siderne af et bånd med lille tykkelse, som er udført af et plastmateriale.The second electrode may be entirely of metal or may consist of a metal coating on one of the sides of a small-thickness band made of a plastic material.
De ovenfor angivne ulemper er undgået ved, at elektretfolien ikke mere anvendes som mekanisk overføringsmiddel, men alene til frembringelse af et elektrisk felt.The above-mentioned disadvantages have been avoided in that the electret foil is no longer used as a mechanical transfer agent, but only for the production of an electric field.
25. Deformationerne hidrørende fra påvirkningerne overføres kun af det sammentrykkelige element og den udvendige elektrode. Desuden er den anden elektrode, der eventuelt er udført ved metallisering, i kontakt med det sammentrykkelige element og ikke med elektretet.25. The deformations resulting from the stresses are transmitted only by the compressible element and the external electrode. In addition, the second electrode, possibly made by metallization, is in contact with the compressible element and not with the electret.
3o Opfindelsen skal herefter forklares nærmere under henvisning til tegningen, hvor fig. 1 viser en første udførelsesform for anordningen ifølge opfindelsen, fig. 2 en første variant af den første udførelses-35 form og fig. 3 en anden variant af den første udførelsesform.The invention will now be explained in more detail with reference to the drawing, in which fig. 1 shows a first embodiment of the device according to the invention; FIG. 2 shows a first variant of the first embodiment and FIG. 3 shows another variant of the first embodiment.
3 1435233 143523
Udførelsesformen i fig. 1 omfatter et fladt relativt tykt metalbånd 2, som er tilstrækkeligt bøjeligt til at kunne opvikles, men kan betragtes som lokalt stift. Dette bånd danner den første elektrode. På dette bånd er der 5 anbragt, limet eller påsvejset en relativt tynd elektret-folie 4, som er dækket af et elektrisk isolerende og sam-mentrykkeligt element 3 dannet af et bånd udført af et stift og regelmæssigt perforeret materiale. En anden elektrode hviler på det isolerende element. Den anden elektro-lo de er dannet af en metalmembran 6, hvis tykkelse er af størrelsesordenen nogle mikron. Metaller, hvoraf membranen er udført, er valgt i afhængighed af den ønskede følsomhed.The embodiment of FIG. 1 comprises a flat relatively thick metal band 2 which is sufficiently flexible to be wound but can be considered locally rigid. This band forms the first electrode. On this belt, a relatively thin electret foil 4, which is covered by an electrically insulating and compressible element 3 formed by a band made of a rigid and regularly perforated material, is affixed, glued or welded. Another electrode rests on the insulating element. The second electrode is formed by a metal membrane 6, the thickness of which is on the order of a few microns. Metals from which the membrane is made are selected depending on the desired sensitivity.
Den anden elektrode kan ligeledes bestå af en folie af tynd plastmateriale, som er metalliseret på den ene af 15 siderne. De mekaniske egenskaber af plastmaterialet, hvoraf folien er udført, muliggør, at den virker som membran, der pålideligt overfører de udøvede påvirkninger. Der vælges f.eks. polypropylen, polycarbonat, polyethylenterephthaiat osv. Tykkelsen af folien er fortrinsvis valgt mellem 2o 8 og 25 mikron. Den metalliserede overflade er anbragt overfor elektretfolien.The second electrode may also consist of a sheet of thin plastic material which is metallized on one of the 15 sides. The mechanical properties of the plastic material from which the film is made allow it to act as a membrane that reliably transmits the applied stresses. For example, polypropylene, polycarbonate, polyethylene terephthalate, etc. The thickness of the foil is preferably selected between 20 and 25 microns. The metallized surface is arranged opposite the electret film.
Det sammentrykkelige element 3, der i udførelsesformen i fig. 1 er udført som et stift regelmæssigt perforeret bånd, kan ligeledes ifølge en første variant bestå af 25 et bånd dannet af sammenflettede elementer (fig. 2) udført af plastmateriale eller et vævet bånd og ifølge en anden variant af et bånd (fig. 3) udført af sammentrykkeligt elastisk materiale, f.eks. celleformet materiale.The compressible element 3, which in the embodiment of FIG. 1 is constructed as a rigid regular perforated band, according to a first variant may also consist of a band formed of interlaced elements (Fig. 2) made of plastic material or a woven band and according to a second variant of a band (Fig. 3). made of compressible elastic material, e.g. cellular material.
I de to ovenfor angivne varianter kan den anden 3o elektrode ligeledes bestå enten af en metalmembran eller af en tynd plastfolie, der er metalliseret på den ene af siderne.In the two above-mentioned variants, the second electrode may also consist either of a metal membrane or of a thin plastic film metallized on one of the sides.
De ovenfor beskrevne udførelsesformer egner sig til de samme kombinationer, som dem der er vist i fig. 3-7 i 35 patentansøgning nr. 2177/75, nemlig i forbindelse i serie af to følsomme enheder ved direkte kontakt mellem deres tykke elektroder og forbindelse i serie eller i parallel 4 143523 åf flere følsomme enheder, stablet med indskydning af bøjelige isolerende bånd for at kompensere parasitsignalerne, som skyldes bøjningerne.The above described embodiments are suitable for the same combinations as those shown in FIG. 3-7 of 35 patent application No. 2177/75, namely in series of two sensitive units by direct contact between their thick electrodes and in series or in parallel 4 in several sensitive units, stacked with the insertion of flexible insulating bands for to compensate for the parasite signals caused by the bends.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK126280A DK144394C (en) | 1976-07-02 | 1980-03-24 | LARGE LENGTH AND CONTINUOUS BUILDING RECEIVER, ISIS FOR SEISMIC |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7620550A FR2357136A2 (en) | 1974-05-17 | 1976-07-02 | Continuous long length load detector - comprises band of compressible material between deformable and fixed electrodes |
FR7620550 | 1976-07-02 |
Publications (3)
Publication Number | Publication Date |
---|---|
DK293577A DK293577A (en) | 1978-01-03 |
DK143523B true DK143523B (en) | 1981-08-31 |
DK143523C DK143523C (en) | 1982-01-11 |
Family
ID=9175278
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK293577A DK143523C (en) | 1976-07-02 | 1977-06-30 | RECEIVER, ISIS TO SEISMIC BULGES, OF LONG LENGTH AND CONTINUOUS BUILDING |
Country Status (10)
Country | Link |
---|---|
JP (2) | JPS5333651A (en) |
AU (1) | AU513212B2 (en) |
BE (1) | BE856235R (en) |
DE (1) | DE2729905A1 (en) |
DK (1) | DK143523C (en) |
GB (2) | GB1584303A (en) |
IT (1) | IT1114621B (en) |
NL (1) | NL7707298A (en) |
NO (1) | NO144863C (en) |
SE (1) | SE7707584L (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62196908U (en) * | 1986-06-04 | 1987-12-15 | ||
JPH0440013Y2 (en) * | 1986-06-18 | 1992-09-18 | ||
GB9620391D0 (en) | 1996-09-30 | 1996-11-13 | Geco Prakla Uk Ltd | Land seismic data acquisition method and seismic cable and cable spool vehicle therefor |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2271733B1 (en) * | 1974-05-17 | 1979-08-03 | Inst Francais Du Petrole |
-
1977
- 1977-06-29 AU AU26559/77A patent/AU513212B2/en not_active Expired
- 1977-06-29 BE BE1008235A patent/BE856235R/en not_active IP Right Cessation
- 1977-06-30 NO NO772313A patent/NO144863C/en unknown
- 1977-06-30 NL NL7707298A patent/NL7707298A/en not_active Application Discontinuation
- 1977-06-30 SE SE7707584A patent/SE7707584L/en not_active Application Discontinuation
- 1977-06-30 DK DK293577A patent/DK143523C/en not_active IP Right Cessation
- 1977-07-01 JP JP7897077A patent/JPS5333651A/en active Pending
- 1977-07-01 DE DE19772729905 patent/DE2729905A1/en active Granted
- 1977-07-01 GB GB27641/77A patent/GB1584303A/en not_active Expired
- 1977-07-01 IT IT25316/77A patent/IT1114621B/en active
- 1977-07-01 GB GB280/80A patent/GB1584304A/en not_active Expired
-
1985
- 1985-02-27 JP JP60036747A patent/JPS60220886A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS60220886A (en) | 1985-11-05 |
DK293577A (en) | 1978-01-03 |
NL7707298A (en) | 1978-01-04 |
DE2729905A1 (en) | 1978-01-26 |
JPS614061B2 (en) | 1986-02-06 |
NO144863C (en) | 1981-12-02 |
IT1114621B (en) | 1986-01-27 |
BE856235R (en) | 1977-12-29 |
GB1584304A (en) | 1981-02-11 |
JPS5333651A (en) | 1978-03-29 |
NO772313L (en) | 1978-01-03 |
AU2655977A (en) | 1979-01-04 |
SE7707584L (en) | 1978-01-03 |
AU513212B2 (en) | 1980-11-20 |
DE2729905C2 (en) | 1988-10-20 |
DK143523C (en) | 1982-01-11 |
NO144863B (en) | 1981-08-17 |
GB1584303A (en) | 1981-02-11 |
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PBP | Patent lapsed |