EP0178970A1 - Ultraschallkabelplombe - Google Patents

Ultraschallkabelplombe Download PDF

Info

Publication number
EP0178970A1
EP0178970A1 EP85401785A EP85401785A EP0178970A1 EP 0178970 A1 EP0178970 A1 EP 0178970A1 EP 85401785 A EP85401785 A EP 85401785A EP 85401785 A EP85401785 A EP 85401785A EP 0178970 A1 EP0178970 A1 EP 0178970A1
Authority
EP
European Patent Office
Prior art keywords
seal
sealing
capsule
delay line
module
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
Application number
EP85401785A
Other languages
English (en)
French (fr)
Other versions
EP0178970B1 (de
Inventor
René Denis
Giulio Ghiringhelli
Alfred Schaal
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Communaute Europeenne De L'energie Atomique Eura
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
European Atomic Energy Community Euratom
Commissariat a lEnergie Atomique CEA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by European Atomic Energy Community Euratom, Commissariat a lEnergie Atomique CEA filed Critical European Atomic Energy Community Euratom
Publication of EP0178970A1 publication Critical patent/EP0178970A1/de
Application granted granted Critical
Publication of EP0178970B1 publication Critical patent/EP0178970B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F3/03—Forms or constructions of security seals
    • G09F3/0376—Forms or constructions of security seals using a special technique to detect tampering, e.g. by ultrasonic or optical means
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/08—Fastening or securing by means not forming part of the material of the label itself
    • G09F3/18—Casings, frames or enclosures for labels
    • G09F3/20—Casings, frames or enclosures for labels for adjustable, removable, or interchangeable labels
    • G09F3/202—Casings, frames or enclosures for labels for adjustable, removable, or interchangeable labels for labels being formed by a combination of interchangeable elements, e.g. price labels
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S367/00—Communications, electrical: acoustic wave systems and devices
    • Y10S367/903—Transmit-receive circuitry
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00—Closure fasteners
    • Y10T292/48—Seals
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00—Closure fasteners
    • Y10T292/48—Seals
    • Y10T292/507—Tag type

Definitions

  • the present invention relates to an ultrasonic seal. It finds an application in a large number of fields and in particular in the surveillance of containers containing dangerous products, precious materials, documents, etc ...
  • the principle of surveillance by ultrasonic seals is known. It consists in permanently fixing an ultrasonic seal on a container to be monitored, this seal being provided with a unique and non-reproducible marking placed in the vicinity of the pre-established area of rupture of the seal. This marking is obtained by irregularities in the structure of the matrix which contains the seal, for example by inclusions of material or cavities distributed randomly.
  • an ultrasonic seal comprises a transducer capable of transforming an electrical excitation into an ultrasonic wave and vice versa
  • the structural irregularities present on the path of the ultrasound wave emitted, give rise to ultrasonic echoes detected by the transducer, which delivers return an electrical signal whose complex shape is specific to the seal.
  • Electronic means are provided to excite the transducer and to collect the electrical signal which it delivers and analyze this signal.
  • the ultrasonic transducer works both as a transmitter and a receiver, so that a seal comprises only one transducer.
  • ultrasonic seals which comprise two transducers, namely a transmitting ultrasonic transducer and a receiving ultrasonic transducer.
  • a transmitting ultrasonic transducer namely a transmitting ultrasonic transducer and a receiving ultrasonic transducer.
  • a receiving ultrasonic transducer namely a transmitting ultrasonic transducer and a receiving ultrasonic transducer.
  • the seal of the prior art comprises a body 1, two coaxial sockets 2 and 3 connected to electronic processing means not shown, an ultrasonic transmitter transducer TE and an ultrasonic transducer receiver TR, both connected to the cores 6 and 7 of the coaxial sockets.
  • a conductive plate 8 forming an electrical screen, is interposed between the two transducers TE and TR. This plate is connected by wires 9 to the external conductors 4 and 5 of the sockets 1 and 2.
  • Each transducer is composed of a piezoelectric element 18, of an electrically conductive damper 19 made of resin (for example epoxy) charged with metallic particles to high concentration (tungsten for example) and a contact electrode 20.
  • the transducers are bonded to a delay line 11 using an adhesive (for example cyanoacrytate).
  • the piezoelectric parts 18 of the TE and TR transducers are bonded to the element 11 forming a delay line for the ultrasonic waves.
  • This element can be in duralumin. Its end is flush with the surface 12 of the seal.
  • a sealing stud 13, for example made of duralumin, is glued against the surface 12 of the seal. It is therefore in contact with the delay line 11.
  • This stud has an acoustic identity.
  • the stud 13 includes three par. ties: a waveguide 14, a rupture zone 15 and an anchoring zone 16. The latter is inserted in the cover of the container to be monitored. The stud must necessarily be broken at the level of the rupture zone 15 so that the container can be opened. The part remaining integral with the stud, after rupture, is removed by machining and the seal can be recovered, a new stud being fixed by gluing.
  • This device is satisfactory, but it is limited to the case where the container is sealed by introducing the non-removable stud into the structure of the container.
  • the object of the present invention is to avoid this limitation by widening the field of use of the seal.
  • the seal of the invention can be used whenever it is advisable to pass a security cable around a package or an object, or through some hole made for this purpose in the structure of the object to be sealed.
  • the invention relates to an ultrasonic seal comprising a module similar to that which has been described above and a capsule for sealing a cable between the module and this capsule.
  • the seal of the invention is first characterized by the fact that the delay line is extended by two frustoconical parts terminated by a spherical cap.
  • the purpose of the first frustoconical part is to guide the major part of the beam emitted towards the second frustoconical part where the marking of the seal takes place, that is to say the various conversions of mode of the longitudinal wave into transverse wave and of area.
  • the dimensions (diameter and length) of this second part have been chosen for the best possible distribution of these different modes.
  • the surface of this cap is marked before sealing and gives the seal a temporary identity.
  • the seal of the invention is characterized in that the sealing capsule is pierced in its counter with a conical hole which is located opposite the frustoconical part of the identity module after sealing.
  • This capsule is force-fitted at the time of sealing and it makes it possible to maintain the sealing cable which is pinched between said capsule and the identity module.
  • the lower part of the identity module is deformed, which creates additional marking.
  • the identity module represented in FIG. 2 comprises two ultrasonic transducers, one for transmission TE, the other for reception TR, a metal screen 8 which separates these transducers and a delay line 11, playing the role of guide of acoustic waves.
  • This delay line presents a first shoulder constituted by a skirt 30 necessary for blocking the cable.
  • An internal conical portion 31 is extended by a frustoconical end piece 32.
  • the conicity is of the order of 4 °.
  • the sealing tool (which will be described in connection with FIG. 5) reduces the diameter of the cone in its end part (from about 0.4 to 0.5 mm) and repels the metal to form a bead 43.
  • the two strands of the sealing cable 46 are pinched between the capsule 40 and the base of the module, locally deforming the skirt 30.
  • Figure 4 shows the assembly in top view.
  • Figure 3 corresponds to the section marked ab.
  • These connections can consist of hollow tubes (for example brass).
  • the sealing operation is carried out using a special clamp which is shown in FIGS. 5 and 6.
  • This clamp maintains on the same axis an identity module and a sealing capsule
  • a wire guide maintains the spacing of the sealing wire to a correct value, which allows you to get as close as possible to the object to be sealed.
  • the clamp (which is of the type used for injecting silicone in cartridges) comprises a body 50, a handle 52, a trigger 54, a pin 56 actuating a spiral spring 58, a support for a sealing capsule 60, an identity module support 62 and a socket 64 for the identity check during sealing In FIG. 6, one can see the position of the different parts being sealed
  • the end of the delay line engages in force in the conical hole 41 of the sealing capsule 4 0 up to clamp the cable 4 6.
  • a punch completes the mechanical connection by removing material of the along the end zone of the part 32. This material is pushed back up to the sealing capsule to form the bead 43. This mechanical connection between the identity module and the sealing capsule is non-removable and the cable blocking is final.
  • the identity of the seal is defined as follows. An imprint is made on the spherical cap 34 of the delay line, which has the effect of modifying the shape of the measured electrical signal. It is sufficient to slightly modify the surface condition of the spherical cap before sealing, to give the seal a temporary identity. This is modified by the sealing operation, which guarantees a non-reproducible identity, even after a possible recovery of the seal.
  • the transducers and the delay line contribute in any case, by their acoustic properties, to ensure the final and unique identity of the seal.
  • the marking of the spherical cap is mainly intended to distribute a sufficient number of information (4 to 5 peaks) in the time interval during which the detected electrical signal is sampled (approximately 10 ⁇ s) with amplitudes contained in a dynamic reasonable (about 10 dB).
  • the dismantling of the seal in order to recover the identity module, can only take place by machining the sealing capsule.
  • Such an operation even if it is carried out with great care, has a high probability of modifying the frustoconical surface 32 of the delay line and, therefore, the identity of the seal.
  • any overheating beyond 60 ° C or any abnormal effort on the delay line causes deterioration of the seal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Package Closures (AREA)
EP85401785A 1984-09-18 1985-09-16 Ultraschallkabelplombe Expired - Lifetime EP0178970B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8414279A FR2570533B1 (fr) 1984-09-18 1984-09-18 Sceau ultrasonore a cable
FR8414279 1984-09-18

Publications (2)

Publication Number Publication Date
EP0178970A1 true EP0178970A1 (de) 1986-04-23
EP0178970B1 EP0178970B1 (de) 1990-03-21

Family

ID=9307815

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85401785A Expired - Lifetime EP0178970B1 (de) 1984-09-18 1985-09-16 Ultraschallkabelplombe

Country Status (6)

Country Link
US (1) US4673922A (de)
EP (1) EP0178970B1 (de)
JP (1) JPS6181925A (de)
CA (1) CA1241733A (de)
DE (1) DE3576748D1 (de)
FR (1) FR2570533B1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1248941B (it) * 1990-06-04 1995-02-11 Agip Spa Procedimento e dispositivo per l'identificazione con ultrasuoni di materiali e attrezzature
US5125700A (en) * 1990-07-30 1992-06-30 Fattori Lazzaro A Security seal
US5120097A (en) * 1990-07-30 1992-06-09 The Rel Corporation Security seal
US5169188A (en) * 1991-08-19 1992-12-08 The United States Of America As Represented By The United States Department Of Energy Ceramic tamper-revealing seals

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR796298A (fr) * 1935-10-15 1936-04-03 Moyens destinés à empêcher ou à déceler les fraudes ou le vol dans les emballages, etc.
EP0082763A1 (de) * 1981-12-22 1983-06-29 Communaute Europeenne De L'energie Atomique (Euratom) Überwachungssystem für eine Vielzahl von Behältern mit ultraschallgesicherten Verschlüssen
EP0102405A1 (de) * 1982-09-03 1984-03-14 Communaute Europeenne De L'energie Atomique (Euratom) Ultraschallidentitätssiegel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR796298A (fr) * 1935-10-15 1936-04-03 Moyens destinés à empêcher ou à déceler les fraudes ou le vol dans les emballages, etc.
EP0082763A1 (de) * 1981-12-22 1983-06-29 Communaute Europeenne De L'energie Atomique (Euratom) Überwachungssystem für eine Vielzahl von Behältern mit ultraschallgesicherten Verschlüssen
EP0102405A1 (de) * 1982-09-03 1984-03-14 Communaute Europeenne De L'energie Atomique (Euratom) Ultraschallidentitätssiegel

Also Published As

Publication number Publication date
CA1241733A (en) 1988-09-06
DE3576748D1 (de) 1990-04-26
US4673922A (en) 1987-06-16
FR2570533B1 (fr) 1987-05-22
FR2570533A1 (fr) 1986-03-21
EP0178970B1 (de) 1990-03-21
JPS6181925A (ja) 1986-04-25

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