EP0149114B1 - Tiefensensor für Unterwassermunition - Google Patents

Tiefensensor für Unterwassermunition Download PDF

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Publication number
EP0149114B1
EP0149114B1 EP84114972A EP84114972A EP0149114B1 EP 0149114 B1 EP0149114 B1 EP 0149114B1 EP 84114972 A EP84114972 A EP 84114972A EP 84114972 A EP84114972 A EP 84114972A EP 0149114 B1 EP0149114 B1 EP 0149114B1
Authority
EP
European Patent Office
Prior art keywords
evaluation circuit
piezoelectric
hydrophone
piezoelement
depth
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.)
Expired
Application number
EP84114972A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0149114A3 (en
EP0149114A2 (de
Inventor
Gerhard Schweitzer
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.)
Dornier GmbH
Original Assignee
Dornier GmbH
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 Dornier GmbH filed Critical Dornier GmbH
Publication of EP0149114A2 publication Critical patent/EP0149114A2/de
Publication of EP0149114A3 publication Critical patent/EP0149114A3/de
Application granted granted Critical
Publication of EP0149114B1 publication Critical patent/EP0149114B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C11/00—Electric fuzes
    • F42C11/001—Electric circuits for fuzes characterised by the ammunition class or type
    • F42C11/005—Electric circuits for fuzes characterised by the ammunition class or type for marine warheads, e.g. torpedoes, mines, depth charges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B22/00—Marine mines, e.g. launched by surface vessels or submarines
    • F42B22/04—Influenced mines, e.g. by magnetic or acoustic effect
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C11/00—Electric fuzes
    • F42C11/02—Electric fuzes with piezo-crystal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C13/00—Proximity fuzes; Fuzes for remote detonation
    • F42C13/06—Proximity fuzes; Fuzes for remote detonation operated by sound waves

Definitions

  • the invention relates to an evaluation circuit for a piezoelectric hydrophone or for a piezoelectric impact sensor on sea mines, torpedoes or underwater projects.
  • Underwater weapons such as mines which have one or more hydrophones for acoustic target recognition or target location.
  • An evaluation circuit is connected to the hydrophone, which determines the distance or the type of target from the strength, frequency or direction of the sound. It is often necessary to know your own water depth for the calculation. So far, our own depth sensors have been used, which show the static pressure and thus the water depth from the deformation of an elastic element (can, membrane or spring).
  • the measurement signal is usually supplied as an electrical quantity.
  • the depth sensor is a separate component that makes the overall system more expensive, takes up space in the warhead and requires the capacity of the on-board battery.
  • the object of the invention is to provide evaluation circuits for underwater weapons that are inexpensive and small, require little electricity and function reliably over a long period of time with an accuracy of approximately ⁇ 0.1 m.
  • the evaluation circuit according to the invention uses the charge shift caused by water pressure in the piezo crystal of the hydrophone already present, as a result of which free charges occur at the interfaces as depth information.
  • the voltage at electrodes corresponding to the water pressure is tapped via a high-impedance amplifier (charge amplifier) and fed to further processing electronics in the weapon computer.
  • the use of the direct voltage component of the hydrophone saves a separate component for depth measurement.
  • the query period is set much shorter for moving projectiles or torpedoes, e.g. B. every second, as with mines (hourly to daily) that have a long life with relatively small changes in depth.
  • the evaluation circuit can be equipped with an automatic system which, for larger pressure changes (depth changes) z. B. turns on the computer by overvoltages, which is usually turned off to save battery capacity. With projectiles or torpedoes z. B. also the piezoelectric impact sensor can be used as a measuring device for the depth.
  • the figure shows a block diagram of a hydrophone evaluation circuit, which also serves as a depth sensor of a marine mine.
  • a piezoelectric hydrophone 4 directly on an outer wall, which, via a crossover 8 and an amplifier 10, supplies electrical alternating signals, which correspond to the ambient noise, to the listening input 12 of a weapon computer 14, where the signals are analyzed for intensity and frequency spectrum.
  • the computer output 16 leads to the ignition mechanism.
  • the piezoelectric hydrophone 4 is also used to measure the depth.
  • a computer-controlled switch 6 and a high-impedance amplifier 20 are provided in the DC voltage output 18 of the crossover 8.
  • the computer 14 closes the switch 6.
  • the output signal of the amplifier 20 corresponding to the charge on the piezo crystal is stored in the computer 14.
  • the crystal is then discharged (a device for this is not shown).

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Ocean & Marine Engineering (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
EP84114972A 1983-12-10 1984-12-08 Tiefensensor für Unterwassermunition Expired EP0149114B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833344750 DE3344750A1 (de) 1983-12-10 1983-12-10 Tiefensensor
DE3344750 1983-12-10

Publications (3)

Publication Number Publication Date
EP0149114A2 EP0149114A2 (de) 1985-07-24
EP0149114A3 EP0149114A3 (en) 1986-10-15
EP0149114B1 true EP0149114B1 (de) 1987-09-30

Family

ID=6216624

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84114972A Expired EP0149114B1 (de) 1983-12-10 1984-12-08 Tiefensensor für Unterwassermunition

Country Status (2)

Country Link
EP (1) EP0149114B1 (enExample)
DE (2) DE3344750A1 (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4212454C2 (de) * 1992-04-14 1997-08-14 Rheinmetall Ind Ag Zünder

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE308763C (enExample) *
US4207623A (en) * 1955-02-08 1980-06-10 The United States Of America As Represented By The Secretary Of The Navy Acoustic mine mechanism
CH542434A (de) * 1972-07-28 1973-09-30 Kistler Instrumente Ag Piezoelektrische Messvorrichtung

Also Published As

Publication number Publication date
DE3466594D1 (en) 1987-11-05
EP0149114A3 (en) 1986-10-15
EP0149114A2 (de) 1985-07-24
DE3344750A1 (de) 1985-06-20
DE3344750C2 (enExample) 1987-10-22

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