FR2505041A1 - USE OF SURFACE TEXTURES AS A RANDOM MARK OF UNIQUE IDENTITY - Google Patents
USE OF SURFACE TEXTURES AS A RANDOM MARK OF UNIQUE IDENTITY Download PDFInfo
- Publication number
- FR2505041A1 FR2505041A1 FR8207747A FR8207747A FR2505041A1 FR 2505041 A1 FR2505041 A1 FR 2505041A1 FR 8207747 A FR8207747 A FR 8207747A FR 8207747 A FR8207747 A FR 8207747A FR 2505041 A1 FR2505041 A1 FR 2505041A1
- Authority
- FR
- France
- Prior art keywords
- profile
- identifying objects
- unique identity
- analyzed
- surface textures
- Prior art date
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/60—Type of objects
- G06V20/64—Three-dimensional objects
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/80—Recognising image objects characterised by unique random patterns
Abstract
SELON L'INVENTION, ON PREND UNE PARTIE DE LA SURFACE DE L'OBJET A IDENTIFIER, ON ANALYSE LES INFORMATIONS CONTENUES DANS UN PROFIL DE LADITE SURFACE ET ON ENREGISTRE LEDIT PROFIL, LES SIGNAUX POUVANT ETRE TRANSPOSES ET ECHANTILLONNES DANS LE DOMAINE DES FREQUENCES.ACCORDING TO THE INVENTION, A PART OF THE SURFACE OF THE OBJECT TO BE IDENTIFIED IS TAKEN, THE INFORMATION CONTAINED IN A PROFILE OF SUCH SURFACE IS ANALYZED AND THIS PROFILE RECORDED, THE SIGNALS CAN BE TRANSPOSED AND SAMPLED IN THE FREQUENCY FIELD.
Description
La présente invention concerne la réalisation d'une méthode qui utilise laThe present invention relates to the realization of a method which uses the
texture ou l'état de surface d'un objet pour texture or surface texture of an object for
pouvoir le caractériser et l'identifier d'une manière unique. be able to characterize and identify it in a unique way.
On pourra ainsi reconnaître un objet une partie de l'objet par un caractère immuable qui lui est propre. Les possibilités d'identification des objets sont nombreuses: on connaît, par exemple, depuis longtemps le principe d'identification par sceau, mais le sceau est un objet par luimême que l'on cherche à reconnaître; il faut après garantir que le sceau appartient bien à l'objet qu'il protège Il est donc d'une fiabilité We can thus recognize an object a part of the object by an immutable character which is proper to it. The possibilities of identifying objects are numerous: we have known, for example, for a long time the principle of identification by seal, but the seal is an object by itself that we seek to recognize; it is then necessary to guarantee that the seal belongs to the object it protects It is therefore reliable
limitée et résistant mal à la fraude. limited and poorly resistant to fraud.
Dans le domaine du contrôle des installations ou structures nucléaires, des techniques de marquage aléatoire sont In the field of control of nuclear installations or structures, random marking techniques are
déjà utilisées On peut citer le marquage par dispersion de parti- already used We can cite the marking by dispersion of parti-
cules solides dans une matrice solide; le caractère immuable étant la répartition des particules ainsi que leur taille, figées une fois pour toutes au sein d'un volume solide; le moyen de mesure fait appel aux ondes ultrasonores et à leur réflexion dans le système hétérogène, lequel, avec le transducteur révélateur employé,doit solid cells in a solid matrix; the immutable nature being the distribution of the particles as well as their size, frozen once and for all within a solid volume; the measuring device uses ultrasonic waves and their reflection in the heterogeneous system, which, with the revealing transducer used, must
constituer un tout immuable.constitute an immutable whole.
La reconnaissance demande une transmission par ultra- Recognition requires transmission by ultra-
sons de l'information, c'est-à-dire un exact repositionnement du transducteur, et une identité absolue entre transducteurs utilisés successivement par rapport au réseau tridimensionnel des particules information sounds, i.e. an exact repositioning of the transducer, and an absolute identity between transducers used successively with respect to the three-dimensional network of particles
dispersées Dans ce cas donc, le caractère utilise des ondes ultra- scattered so in this case the character uses ultra-
sonores pour être mesuré; il n'est pas directement révélé De plus, sound to be measured; it is not directly revealed Furthermore,
des technologies très spéciales sont nécessaires. very special technologies are needed.
Pour pallie r les susdits inconvénients on propose, To overcome the above drawbacks,
selon l'invention, une nouvelle méthode d'identification des obiets. according to the invention, a new method of identifying objects.
Tout objet solide est limité par une surface Si un objet solide est immuable par nature, sa surface, considérée comme enveloppe indissociable, l'est aussi Dans les conditions usuelles, Any solid object is limited by a surface If a solid object is immutable by nature, its surface, considered as an inseparable envelope, is also so Under the usual conditions,
la surface d'un objet contribue déjà à son identification. the surface of an object already contributes to its identification.
On propose donc d'utiliser la texture ou état de We therefore propose to use the texture or state of
surface des objets pour pouvoir les caractériser d'une manière unique. surface of objects to be able to characterize them in a unique way.
La surface doit présenter,dans la zone o elle est utilisée, un caractère aléatoire certain; c'est en général le cas au niveau de la rugosité des surfaces mécaniques Si elle est The surface must present, in the area where it is used, a certain randomness; this is generally the case with the roughness of mechanical surfaces If it is
utilisée telle que venue de construction, on la dira naturelle. used as coming from construction, it will be said to be natural.
Si nécessaire, on la transformera localement par surfaçage ou rayurage ou grattage superficiel pour lui conférer une texture If necessary, it will be locally transformed by surfacing or scratching or surface scraping to give it a texture.
bien aléatoire c'est-à-dire un marquage adéquat. very random, that is to say an adequate marking.
La texture, naturelle ou conférée, est le caractère immuable Son relevé, par palpeur, stylo ou tout autre moyen, est The texture, natural or imparted, is the immutable character Its record, by feeler, pen or any other means, is
le moyen d'identification.the means of identification.
Selon la caractéristique principale de l'invention, According to the main characteristic of the invention,
on prend une partie de la surface de l'objet à identifier, on ana- we take a part of the surface of the object to identify, we ana-
lyse les informations contenues dans un profil de ladite surface lyses the information contained in a profile of said surface
et on enregistre ledit profil.and saving said profile.
Selon une autre caractéristique de l'invention, les According to another characteristic of the invention, the
signaux du profil de la surface à analyser sont transposés et échan- signals from the profile of the surface to be analyzed are transposed and exchanged
tillonnés dans le domaine de fréquences. staggered in the frequency domain.
La figure annexée montre comment la section d'une surface mécanique présente un aspect topographique aléatoire Le The attached figure shows how the section of a mechanical surface presents a random topographic aspect.
caractère d'unicité de la coupe provient de la richesse d'informa- uniqueness of the cut comes from the wealth of informa-
tions résidant à la surface d'un objet: pics, vallées, plateaux, hauteurs, directions, etc, quand elle est explorée à l'échelle voulue. En conséquence, si deux surfaces ont des dimensions et des aspects similaires à l'échelle de la fabrication (tolérance, finis, profil), on peut toujours trouver, à une échelle plus fine, un état de rugosité pouvant les différencier Dans notre cas, c'est l'élément aspérité et l'élément vallée et leur emplacement qui sont importants. Se pose donc après, pour l'identification, le prob Lème du repositionnement exact du palpeur en face de la section explorée antérieurement. On a vérifié qu'une pièce posée sur un simple statif muni d'un ergot, quand on la replace une autre fois sur le même tions residing on the surface of an object: peaks, valleys, plateaus, heights, directions, etc., when it is explored at the desired scale. Consequently, if two surfaces have similar dimensions and aspects on the manufacturing scale (tolerance, finishes, profile), we can always find, on a finer scale, a state of roughness that can differentiate them. In our case, it is the roughness element and the valley element and their location that are important. Therefore arises afterwards, for identification, the prob Lème of the exact repositioning of the probe in front of the section explored previously. We have verified that a part placed on a simple stand fitted with a lug, when we replace it again on the same
statif,redonne bien la même information. stand, gives the same information well.
Le repositionnement peut être de deux types: l'iden- There are two types of repositioning:
tité (plaquette ou autre support) est amende à l'appareil de mesure, il s'agit ici de marque transportable; ou bien l'appareil est amené tity (plate or other medium) is fine to the measuring device, here it is a transportable mark; or the device is brought
à la structure marquée et il s'agit alors de marque fixe. with the marked structure and it is then a fixed mark.
Le signal des profils des surfaces peut être visualisé directement sur papier ou bien on peut le digitaliser, c'est-à-dire on compte les aspérités, on mesure les hauteurs, les distances et The surface profile signal can be viewed directly on paper or it can be digitized, i.e. counting the roughness, measuring heights, distances and
on obtient une clef digitale dudit signal. a digital key is obtained from said signal.
Les signaux de profil peuvent être aussi transposés et échantillonnés dans le domaine des fréquences, de façon que des Profile signals can also be transposed and sampled in the frequency domain, so that
spectres partiels puissent à volonté être utilisés comme clef d'iden- partial spectra can be used as an identification key at will
tité d'une texture.texture.
La méthode d'identification proposée par le présent brevet permet de garantir des structures déjà protégées par des sceaux conventionnels Elle peut constituer en soi une technique de scellement Par l'exemple, l'ensemble tige filetée et boulon peut être limé à ras et constituer une marque unique; si quelqu'un devait dévisser le boulon, il ne pourrait jamais le revisser et le repositionner exactement par rapport à la vis La mesure de The identification method proposed by this patent makes it possible to guarantee structures already protected by conventional seals. It can in itself constitute a sealing technique. For example, the threaded rod and bolt assembly can be filed flush and constitute a single brand; if someone were to unscrew the bolt, they could never re-screw it and reposition it exactly in relation to the screw.
profil, à cheval sur vis et boulon, détecterait cette fraude. profile, straddling screws and bolts, would detect this fraud.
Cette méthode se prête bien à l'identification des objets en utilisant leur propre texture topographique, sans devoir y pratiquer de trou de référence Comme par exemple: tableaux, This method lends itself well to the identification of objects using their own topographic texture, without having to practice a reference hole. For example: tables,
statues ou meubles, là ou les autres méthodes ou techniques d'iden- statues or furniture, where other methods or techniques of identification
tification ne seraient pas possibles sans endommager l'oeuvre d'art. tification would not be possible without damaging the work of art.
Un autre avantage de l'invention réside dans le fait que l'appareil de lecture peut être de petites dimensions et ne nécessite pas de gros moyens pour l'identification, comme c'est Another advantage of the invention lies in the fact that the reading device can be of small dimensions and does not require large means for identification, as is
le cas pour les transducteurs piézoélectriques. the case for piezoelectric transducers.
Claims (4)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU83333A LU83333A1 (en) | 1981-05-04 | 1981-05-04 | USE OF SURFACE TEXTURES AS A SINGLE IDENTITY MARK |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2505041A1 true FR2505041A1 (en) | 1982-11-05 |
| FR2505041B1 FR2505041B1 (en) | 1986-11-28 |
Family
ID=19729640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8207747A Expired FR2505041B1 (en) | 1981-05-04 | 1982-05-04 | USE OF SURFACE TEXTURES AS A RANDOM MARK OF UNIQUE IDENTITY |
Country Status (5)
| Country | Link |
|---|---|
| DE (1) | DE3216867C2 (en) |
| FR (1) | FR2505041B1 (en) |
| GB (1) | GB2097979B (en) |
| IT (1) | IT1147935B (en) |
| LU (1) | LU83333A1 (en) |
Families Citing this family (46)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2567947B1 (en) * | 1984-07-23 | 1986-12-26 | Euratom | SURFACE TEXTURE READING ACCESS CONTROL SYSTEM |
| DE3935207A1 (en) * | 1989-10-23 | 1991-05-02 | Dornier Gmbh | Identification marking partic. for armoured vehicles - has cpd. of iron oxide, aluminium and higher m.pt. particles fired, casting to armour, cooled and ultrasonically recorded for screening |
| RU2267160C2 (en) * | 1999-07-19 | 2005-12-27 | Российский Федеральный Ядерный Центр-Всероссийский Научно-Исследовательский Институт Технической Физики Им. Акад. Е.И. Забабахина (Рфяц-Вниитф) | Object identification method |
| DE10040188A1 (en) * | 2000-08-17 | 2002-02-28 | Infineon Technologies Ag | Seal for the authentication of sealed objects and methods for producing and testing the seal |
| DE10155780A1 (en) * | 2001-11-14 | 2003-05-22 | Vision Tools Hard Und Software | Securing objects against counterfeiting and/or imitation involves inserting and/or attaching non-reproducible physical random pattern during manufacture for later detection and comparison |
| US8171567B1 (en) | 2002-09-04 | 2012-05-01 | Tracer Detection Technology Corp. | Authentication method and system |
| WO2005088517A1 (en) | 2004-03-12 | 2005-09-22 | Ingenia Technology Limited | Methods and apparatuses for creating authenticatable printed articles and subsequently verifying them |
| BRPI0508631A (en) | 2004-03-12 | 2007-08-07 | Ingenia Technology Ltd | apparatus for determining a signature of an article arranged in a reading volume, use of the apparatus, methods for identifying an article made of paper or cardboard, an article made of plastic, a product by its packaging, a document, a garment or footwear, and a disc, method for tagging an article, and, tagged article |
| GB2417592B (en) | 2004-08-13 | 2006-07-26 | Ingenia Technology Ltd | Authenticity verification of articles |
| WO2007012816A1 (en) | 2005-07-27 | 2007-02-01 | Ingenia Technology Limited | Verification of authenticity |
| EP1969525A1 (en) | 2005-12-23 | 2008-09-17 | Ingenia Holdings (UK)Limited | Optical authentication |
| DE102006006733B3 (en) * | 2006-02-13 | 2007-08-23 | Iba Ag | Method and device for identifying a section of a semifinished product |
| GB2440386A (en) * | 2006-06-12 | 2008-01-30 | Ingenia Technology Ltd | Scanner authentication |
| DE102007030384B4 (en) | 2007-06-29 | 2009-02-05 | Dade Behring Marburg Gmbh | Method for identifying a transparent object based on its absorption spectrum |
| GB2466465B (en) | 2008-12-19 | 2011-02-16 | Ingenia Holdings | Authentication |
| GB2466311B (en) | 2008-12-19 | 2010-11-03 | Ingenia Holdings | Self-calibration of a matching algorithm for determining authenticity |
| GB2476226B (en) | 2009-11-10 | 2012-03-28 | Ingenia Holdings Ltd | Optimisation |
| DE102010015014A1 (en) | 2010-04-14 | 2011-10-20 | Bayer Technology Services Gmbh | Optical scanner |
| DE102010021380A1 (en) | 2010-05-25 | 2011-12-01 | Bayer Technology Services Gmbh | Identification of objects |
| US8526743B1 (en) | 2010-11-01 | 2013-09-03 | Raf Technology, Inc. | Defined data patterns for object handling |
| US8774455B2 (en) | 2011-03-02 | 2014-07-08 | Raf Technology, Inc. | Document fingerprinting |
| US9443298B2 (en) | 2012-03-02 | 2016-09-13 | Authentect, Inc. | Digital fingerprinting object authentication and anti-counterfeiting system |
| US9152862B2 (en) | 2011-09-15 | 2015-10-06 | Raf Technology, Inc. | Object identification and inventory management |
| DE102011110478B4 (en) | 2011-08-17 | 2018-07-26 | Gottfried Wilhelm Leibniz Universität Hannover | Method for recognizing a three-dimensional object, device and computer program therefor |
| DE102013219591A1 (en) * | 2013-09-27 | 2015-04-16 | Albert-Ludwigs-Universität Freiburg | METHOD FOR AUTHENTICATING MICROELECTRONIC COMPONENTS |
| DE102014108664B4 (en) * | 2014-06-20 | 2017-09-21 | Friedrich Wilhelm Bauer | Identification of components |
| US10037537B2 (en) | 2016-02-19 | 2018-07-31 | Alitheon, Inc. | Personal history in track and trace system |
| EP3236401A1 (en) | 2016-04-18 | 2017-10-25 | Alitheon, Inc. | Authentication-triggered processes |
| US10614302B2 (en) | 2016-05-26 | 2020-04-07 | Alitheon, Inc. | Controlled authentication of physical objects |
| US10740767B2 (en) | 2016-06-28 | 2020-08-11 | Alitheon, Inc. | Centralized databases storing digital fingerprints of objects for collaborative authentication |
| US10915612B2 (en) | 2016-07-05 | 2021-02-09 | Alitheon, Inc. | Authenticated production |
| US10902540B2 (en) | 2016-08-12 | 2021-01-26 | Alitheon, Inc. | Event-driven authentication of physical objects |
| US10839528B2 (en) | 2016-08-19 | 2020-11-17 | Alitheon, Inc. | Authentication-based tracking |
| EP3435287A3 (en) | 2017-07-25 | 2019-05-01 | Alitheon, Inc. | Model-based digital fingerprinting |
| EP3514715A1 (en) | 2018-01-22 | 2019-07-24 | Alitheon, Inc. | Secure digital fingerprint key object database |
| US10963670B2 (en) | 2019-02-06 | 2021-03-30 | Alitheon, Inc. | Object change detection and measurement using digital fingerprints |
| EP3734506A1 (en) | 2019-05-02 | 2020-11-04 | Alitheon, Inc. | Automated authentication region localization and capture |
| EP3736717A1 (en) | 2019-05-10 | 2020-11-11 | Alitheon, Inc. | Loop chain digital fingerprint method and system |
| US11238146B2 (en) | 2019-10-17 | 2022-02-01 | Alitheon, Inc. | Securing composite objects using digital fingerprints |
| EP3859603A1 (en) | 2020-01-28 | 2021-08-04 | Alitheon, Inc. | Depth-based digital fingerprinting |
| EP3885982A3 (en) | 2020-03-23 | 2021-12-22 | Alitheon, Inc. | Hand biometrics system and method using digital fingerprints |
| US11568683B2 (en) | 2020-03-23 | 2023-01-31 | Alitheon, Inc. | Facial biometrics system and method using digital fingerprints |
| EP3929806A3 (en) | 2020-04-06 | 2022-03-09 | Alitheon, Inc. | Local encoding of intrinsic authentication data |
| US11663849B1 (en) | 2020-04-23 | 2023-05-30 | Alitheon, Inc. | Transform pyramiding for fingerprint matching system and method |
| US11700123B2 (en) | 2020-06-17 | 2023-07-11 | Alitheon, Inc. | Asset-backed digital security tokens |
| FR3120269A1 (en) | 2021-03-01 | 2022-09-02 | TiHive | Individualized authentication of products using terahertz waves |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2755702A (en) * | 1951-10-11 | 1956-07-24 | Gen Electric | Smoothness monitoring device |
| US3857640A (en) * | 1973-07-19 | 1974-12-31 | E Hilbon | Identification means for an article and method and apparatus for recording same |
| US4200394A (en) * | 1971-01-13 | 1980-04-29 | The United States Of America As Represented By The Secretary Of The Army | Hologram technique for establishing the integrity of packages |
| US4218674A (en) * | 1975-09-09 | 1980-08-19 | Dasy Inter S.A. | Method and a system for verifying authenticity safe against forgery |
| EP0018198A2 (en) * | 1979-04-24 | 1980-10-29 | European Atomic Energy Community (Euratom) | System for the identification of objects, for example nuclear fuel elements |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1099839A (en) * | 1965-11-04 | 1968-01-17 | British Petroleum Co | Improvements relating to the separation of hydrocarbon mixtures |
| DE1808298B2 (en) * | 1968-11-12 | 1971-09-30 | METHOD AND DEVICE FOR DETECTING AND EVALUATING FINGERPRINTS | |
| GB1357734A (en) * | 1970-05-13 | 1974-06-26 | Int Art Registry Uk Ltd | Authentication of works of art |
| CH529398A (en) * | 1971-03-23 | 1972-10-15 | Landis & Gyr Ag | Method for preventing successful counterfeiting of stamps |
-
1981
- 1981-05-04 LU LU83333A patent/LU83333A1/en unknown
-
1982
- 1982-04-28 IT IT48297/82A patent/IT1147935B/en active
- 1982-04-30 GB GB8212700A patent/GB2097979B/en not_active Expired
- 1982-05-03 DE DE3216867A patent/DE3216867C2/en not_active Expired - Fee Related
- 1982-05-04 FR FR8207747A patent/FR2505041B1/en not_active Expired
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2755702A (en) * | 1951-10-11 | 1956-07-24 | Gen Electric | Smoothness monitoring device |
| US4200394A (en) * | 1971-01-13 | 1980-04-29 | The United States Of America As Represented By The Secretary Of The Army | Hologram technique for establishing the integrity of packages |
| US3857640A (en) * | 1973-07-19 | 1974-12-31 | E Hilbon | Identification means for an article and method and apparatus for recording same |
| US4218674A (en) * | 1975-09-09 | 1980-08-19 | Dasy Inter S.A. | Method and a system for verifying authenticity safe against forgery |
| EP0018198A2 (en) * | 1979-04-24 | 1980-10-29 | European Atomic Energy Community (Euratom) | System for the identification of objects, for example nuclear fuel elements |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3216867A1 (en) | 1982-12-02 |
| IT8248297A0 (en) | 1982-04-28 |
| FR2505041B1 (en) | 1986-11-28 |
| IT1147935B (en) | 1986-11-26 |
| GB2097979B (en) | 1985-11-27 |
| DE3216867C2 (en) | 1994-02-17 |
| LU83333A1 (en) | 1983-03-24 |
| GB2097979A (en) | 1982-11-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| FR2505041A1 (en) | USE OF SURFACE TEXTURES AS A RANDOM MARK OF UNIQUE IDENTITY | |
| Holbrook et al. | Estimating oceanic turbulence dissipation from seismic images | |
| Barbour et al. | Detection of seismic signals using seismometers and strainmeters | |
| Williams et al. | Measurements of turbulence in the benthic boundary layer over a gravel bed | |
| Bertuccioli et al. | A submersible particle image velocimetry system for turbulence measurements in the bottom boundary layer | |
| Randolph et al. | Optical measurements of small deeply penetrating bubble populations generated by breaking waves in the Southern Ocean | |
| Webb | Long-period acoustic and seismic measurements and ocean floor currents | |
| FR3089301A1 (en) | System and method for determining characteristics of a crack | |
| Ronan et al. | Acoustic and seismic fields of hydraulic jumps at varying Froude numbers | |
| Parrott et al. | Measurement and evaluation of the acoustic reflectivity of the sea floor | |
| Lisimenka et al. | Estimation of dimensions and orientation of multiple riverine dune generations using spectral moments | |
| CN112904409B (en) | Device and method for measuring deposition characteristics of underwater sediments based on distributed acoustic sensing technology | |
| Igel et al. | Extracting shear wave polarizations from different source orientations: Synthetic modelling | |
| Look et al. | Cavitation Damage Detection Through Acoustic Emissions | |
| Miller et al. | Density and velocity fine structure enhancement in oceanic eddies | |
| Frankenstein | The effects of waves on pancake ice | |
| Zhang et al. | Terahertz EM Backscattering from Sea Surface Covered by Oil Film with Finite Thickness at Small Incident Angle | |
| Chen et al. | Analysis of the Variation in Bearing Estimation Error with Frequency Band for a Source beneath Arctic Ice by a Geophone | |
| Lowenstein | Position determination near the sea floor | |
| Eshaghi et al. | Moment magnitude estimation using Iran strong motion data | |
| CN109917458A (en) | Oil gas analyzing method and device | |
| Assemien et al. | NOISE INDUCED BY DYNAMIC CONTACT FORCES OF A RUBBER CYLINDER ROLLING ON ROAD PAVEMENT SAMPLES | |
| Bjørnø | Nonlinear acoustics of water‐saturated marine sediments | |
| FR2904687A1 (en) | Mechanical deformation e.g. traction deformation, measuring device for electric supply contact line of electric train, has Bragg grating optical fiber sensors arranged at distinct distances from neutral axis plane of line | |
| Saenger et al. | Measurement of the Statistical Properties of the Ocean Surface with Instrumented Surface Floats, Part I: Theory of Measurement |