Wieslaw Bicz

Wieslaw Bicz
PBP Optel sp. z o.o. · Ultrasonic technology

MSc Eng. In Physics, Coherent optics. Faculty of Fundamental Problems of Technology at Technical University in Wroclaw, 1978

About

20
Publications
2,721
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
64
Citations

Publications

Publications (20)
Article
Full-text available
The paper describes finger reader, that generates the picture of the fingerprint using the principle of acoustic holography and ultrasonic waves travelling parallel to the sensor surface. The idea realized in this unit allows the creation of devices based on thin plates with different sizes, able to replace typical touch screens, even of quite larg...
Article
Full-text available
The paper describes the application of critically refracted longitudinal ultrasonic subsurface waves (LCR, known also as lateral, creeping or head waves) for nondestructive flaw detection in friction welding or MAIB welded thin walled pipe shaped parts. Theory and practical laboratory and industrial applications are presented. Keywords: ultrasonic...
Article
Full-text available
W artykule zaprezentowano współczesne metody kontroli ultradźwiękowej elementów o przekrojach rurowych łączonych różnymi metodami spawalniczymi. Dla wybranych rozwiązań technologicznych przedstawiono zastosowanie wybranych prezentacji sygnałów ultradźwiękowych w różnych aplikacjach przemysłowych, głównie zautomatyzowanych. Ponadto przedstawiono ist...
Conference Paper
Full-text available
This paper describes finger reader, that generates a fingerprint image using ultrasonic waves travelling parallel to the sensor surface in concert with the principle of acoustic holography. The idea realized in this unit allows for the creation of devices based on thin plates of varying sizes, from smaller than a postage stamp, to the largest live...
Article
Full-text available
A new instrument for precise measurements of velocity of sound in gases was developed and tested. The instrument implements improved velocity of sound measuring technique based on time-of-flight measurement of ultrasonic pulses. The instrument was developed primarily for conducting measurements in natural gas, it can operate in wide ranges of natur...
Article
Full-text available
The article presents currently used ultrasonic tests of elements having tubular cross-sections, joined by means of various welding methods. In addition, the article discusses various ultrasonic signals in industrial (primarily automatic) applications in relation to selected technological solutions as well as presents existing industrial stations fo...
Article
Full-text available
Mobile phones have become an inseparable companion of many people and are useful in more and more cases. However, it is increasingly necessary to ensure that they can only be used by an authorized person, i.e. only the owner of the phone.
Article
Full-text available
Telefony komórkowe stały się nieodłącznym towarzyszem wielu ludzi i przydają się w co-raz większej liczbie wypadków. Coraz częściej jednak konieczne jest zagwarantowanie, że może z nich skorzystać tylko osoba uprawniona, czyli wyłącznie właściciel telefonu. Chodzi, oczywiście, o takie funkcje, jak płacenie za usługi, przeprowadza-nie operacji banko...
Article
Full-text available
Effective use of a pseudo-whisper for speech intelligibility While considering the possibility of using a pseudo-whisper that people without a larynx are capable of, the idea arose slightly distant from the classic, known so far. It can be stated that it is a kind of reversal of the speaking process: Under physiological conditions of voice product...
Article
Full-text available
This paper describes the design of an ultrasound camera which has a resolution of 0.1mm. The camera allows the observation of the near surface structures of solid objects and is suitable for the finger ridge pattern imaging (i.e., pattern which is reflected in a fingerprint). The device can be used for a biometric identification of individuals (for...
Article
Full-text available
This paper describes the design of an ultrasonic camera which has the resolution of 0.1 mm. The camera allows the observation of the near surface structures of solid objects and is suitable for the finger ridge pattern imaging (i.e. pattern which is reflected in a fingerprint). The devices can be used for a biometric identification of individuals (...
Article
Full-text available
Neben dem Ansatz, den Fingerab-druck fiber Halbleiter-oder opti-sche Verfahren zu identifizieren, gibt es weitere Methoden. Ein Ver-fahren setzt dabei auf Ultraschall-die Tćiler und Erhebungen erzeugen charakteristische Verćinderungen der Schallwelle, die mittels Elektro-nik ausgewertet werden kónnen. I n den letzten Jahren laBt sich die Entstehung...
Chapter
Full-text available
The scope of potential use of identification systems widens, including restricted area or confidential data access, credit card use etc. Only in 1993 banks lost more than three billions dollars due to credit cards forgery and misuse 1. “No two fingerprints from different fingers have ever been found identical…”2. That is why the fingerprint structu...
Article
The paper presents prototypes of ultrasonic sensors for fingerprint pattern recognition. Their principle of operation is based on the amplitude measurements taken in selected points of acoustic field of ultrasonic wave diffracted from subsurface finger structure. Examples of sensor construction and measured data are presented. Fingerprint structure...
Article
Full-text available
The paper presents prototypes of ultrasonic sensors for fingerprint pattern recognition. Their principle of operation is based on the amplitude measurements taken in selected points of acoustic field of ultrasonic wave diffracted from subsurface finger structure. Examples of sensor construction and measured data are presented. Fingerprint structure...
Article
The paper presents prototypes of ultrasonic sensors for fingerprint pattern recognition. Their principle of operation is based on the amplitude measurements taken in selected points of acoustic field of ultrasonic wave diffracted from subsurface finger structure. Examples of sensor construction and measured data are presented. Fingerprint structure...
Article
Full-text available
The setup for reconstruction of 2D quasi periodical structures from the measurements of its ultrasonic diffractive field is presented. Construction of the ultrasonic head is based on the prototype of our ultrasonic sensor for fingerprint pattern recognition. An example of the measured and reconstructed acoustic image of a fingerprint is compared wi...
Article
Full-text available
Podstawowym obszarem zainteresowania autorów są ultradźwiękowe metody identyfikacji struktur dwuwymiarowych, w szczególności linii papilarnych palców.

Network

Cited By

Projects

Projects (2)
Project
The main goal of the project is to develop an innovative UltraGasQ Technology for express control and real-time measurement of quality of natural gas and respective prototype of measuring instrument. The novel instrument will have distinctive competitive advantages relevant for a wide range of end-users (from private households to gas-grid operators and industry) – real-time & autonomous measurements of specific quality characteristics with sufficient accuracy at low capital and maintenance costs.