DE4429680A1 - Method for recognizing objects detected by ultrasound - Google Patents

Method for recognizing objects detected by ultrasound

Info

Publication number
DE4429680A1
DE4429680A1 DE19944429680 DE4429680A DE4429680A1 DE 4429680 A1 DE4429680 A1 DE 4429680A1 DE 19944429680 DE19944429680 DE 19944429680 DE 4429680 A DE4429680 A DE 4429680A DE 4429680 A1 DE4429680 A1 DE 4429680A1
Authority
DE
Germany
Prior art keywords
pulse
object
ultrasound
sent
method
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.)
Withdrawn
Application number
DE19944429680
Other languages
German (de)
Inventor
Wieslaw Dipl Ing Bicz
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.)
SONIDENT ANSTALT, VADUZ, LI
Original Assignee
TOPPING BEST Ltd
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
Priority to DE4328729 priority Critical
Application filed by TOPPING BEST Ltd filed Critical TOPPING BEST Ltd
Priority to DE19944429680 priority patent/DE4429680A1/en
Priority claimed from PCT/EP1994/002807 external-priority patent/WO1995006262A1/en
Publication of DE4429680A1 publication Critical patent/DE4429680A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/06Systems determining the position data of a target
    • G01S15/08Systems for measuring distance only
    • G01S15/10Systems for measuring distance only using transmission of interrupted pulse-modulated waves
    • G01S15/102Systems for measuring distance only using transmission of interrupted pulse-modulated waves using transmission of pulses having some particular characteristics
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/539Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K9/00Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
    • G06K9/00006Acquiring or recognising fingerprints or palmprints
    • G06K9/00013Image acquisition
    • G06K9/0002Image acquisition by non-optical methods, e.g. by ultrasonic or capacitive sensing

Description

The invention relates to a method for recognition of surface structures and near-surface structures of objects detected with ultrasound, such as, for example Identification cards placed objects, such as fingerprints press.

A recognition of objects, for example identifica purposes with ultrasound, has so far been Echo method has been made, as well as the sto maintenance-free material testing is used.  

Method for capturing objects with ultrasound, at where the object rests on a surface and through one on the aforementioned surface adjacent solid or a fluid-filled body with ultrasound waves len is sonicated and the waves of a recipient are known. The ones from Waves picked up by the receiver and scattered back by the object contain information about the average intensi activity and / or phase of backscattering sent to a computer is passed on for analysis and recording. It can either a pulse group (burst) or just one single pulse can be sent.

When sending a single pulse comes through the Ultra sound excitation of the object in response is not a single one impulse back, but impulse sequences and that over a certain time and of course in different riches exercises. The backscattered pulse sequences can also be referred to as a modulated pulse group. If the return scattered impulse responses in every direction saved, you get an Infor as a final result mation, which can be seen as an image but also as a collection of Shows curves.

Based on this theory, according to the invention Method for recognizing objects detected with ultrasound ten proposed, that is, objects that have already been captured and the collection of impulse responses are already known are. The method according to the invention is in claim 1 laid down. Based on the impulse responses of one The object is electronically transmitted via a digital analog converter the pulse sequence obtained during detection generated and in reverse order from the direction  they have come back to the object to be examined sounded. If the object is what you are looking for acts that corresponds to the transmitted pulse trains in response after a certain time a single pulse sent back. This process can be done for different Rich are repeated, i.e. pulse sequences from different which directions are sent, because then it is guaranteed that when several individual pulses return, a certainty is given that the object is the ge sought acts. The suggestion entered for recognition must fit to the recorded structure, otherwise have the answers only a weak amplitude.

It is easy to see that when broadcast, one for the Object matching pulse train at a specific time of the day Recipients of all object points have a strong impulse response receives. The receiver is programmed so that it only one strong return pulse or several strong return pulses passes on the evaluation device.

Objects can also be created using the method according to the invention that are different when they are recognized than when they are detected Have located. The detection changes only the time span of the response, which then compared to which the acquisition is changed.

The invention uses the autocorrelation that results if the pulse train sent to the searched and before matched object. For an autocorrelation, however a strong impulse characteristic. If such Impulse, as already stated, for some directions again fetched, this is the basis for the determination that the tested and previously ultrasound  object is the correct one. If it is this Not giving impulses, this is the basis for the festival position that the object does not match the template agrees.

Claims (3)

1. A method for recognizing objects detected with ultrasound, such as objects placed on identification cards, characterized in that the pulse responses detected and stored by ultrasound of a specific object are converted into pulse sequences via a digital-to-analog converter and a pulse or pulse sequences are sent to the object to be examined be, after which a single pulse comes back after a certain time, as soon as the pulse sequences match the impulse response of the object, the pulse or pulse sequences being picked up by a receiver and passed on to an evaluation device.
2. The method according to claim 1, characterized, that the pulse trains in different directions the object to be examined is sent.
3. The method according to claims 1 or 2, characterized, that the pulse trains over a certain period of time be sent.
DE19944429680 1993-08-26 1994-08-22 Method for recognizing objects detected by ultrasound Withdrawn DE4429680A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE4328729 1993-08-26
DE19944429680 DE4429680A1 (en) 1993-08-26 1994-08-22 Method for recognizing objects detected by ultrasound

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19944429680 DE4429680A1 (en) 1993-08-26 1994-08-22 Method for recognizing objects detected by ultrasound
PCT/EP1994/002807 WO1995006262A1 (en) 1993-08-26 1994-08-25 Process for identifying ultrasonically registered objects

Publications (1)

Publication Number Publication Date
DE4429680A1 true DE4429680A1 (en) 1995-03-30

Family

ID=6496091

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19944429680 Withdrawn DE4429680A1 (en) 1993-08-26 1994-08-22 Method for recognizing objects detected by ultrasound

Country Status (1)

Country Link
DE (1) DE4429680A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002037402A1 (en) * 2000-11-03 2002-05-10 Stockburger, Andreas Method and device for identifying test objects

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002037402A1 (en) * 2000-11-03 2002-05-10 Stockburger, Andreas Method and device for identifying test objects

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Legal Events

Date Code Title Description
8139 Disposal/non-payment of the annual fee
8170 Reinstatement of the former position
8110 Request for examination paragraph 44
8127 New person/name/address of the applicant

Owner name: SONIDENT ANSTALT, VADUZ, LI

8130 Withdrawal