SE8006758L - SET AND DEVICE FOR PROCESSING WIDE DIGITAL SIGNALS OF LARGE DYNAMICS - Google Patents
SET AND DEVICE FOR PROCESSING WIDE DIGITAL SIGNALS OF LARGE DYNAMICSInfo
- Publication number
- SE8006758L SE8006758L SE8006758A SE8006758A SE8006758L SE 8006758 L SE8006758 L SE 8006758L SE 8006758 A SE8006758 A SE 8006758A SE 8006758 A SE8006758 A SE 8006758A SE 8006758 L SE8006758 L SE 8006758L
- Authority
- SE
- Sweden
- Prior art keywords
- signals
- analog
- digital
- ultrasonic
- digital converter
- Prior art date
Links
- 238000011156 evaluation Methods 0.000 abstract 1
- 238000004154 testing of material Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B11/00—Transmission systems employing sonic, ultrasonic or infrasonic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H3/00—Measuring characteristics of vibrations by using a detector in a fluid
- G01H3/10—Amplitude; Power
- G01H3/12—Amplitude; Power by electric means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/36—Detecting the response signal, e.g. electronic circuits specially adapted therefor
- G01N29/40—Detecting the response signal, e.g. electronic circuits specially adapted therefor by amplitude filtering, e.g. by applying a threshold or by gain control
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G7/00—Synchronisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/62—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
- H04B1/64—Volume compression or expansion arrangements
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Analogue/Digital Conversion (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
Abstract
In the processing of a wide-band, analog ultrasonic echo signals of a large dynamic range, and especially echo signals generated in the ultrasonic testing of material, signal distortions must be avoided in order to enable an exact analysis of fault signals and a good reproducibility. To accomplish this object, the signals generated by an ultrasonic detector are supplied to a linear preamplifier generating analog output signals. The analog output signals are fed to an analog-to-digital converter, which converts them directly and in parallel way into logarithmically encoded digital signals. In these digital signals one bit is assigned to the polarity of the input signals while the other bits correspond to the respective level of the ultrasonic echo signal. The analog-to-digital converter is composed of a plurality of parallel-connected units, which together define a logarithmic characteristic curve for positive and negative output signals of the preamplifier. The digital signals are supplied to an evaluation unit connected to the analog-to-digital converter. In this manner, notwithstanding the wide-band ultrasonic echo signals of large dynamic range, substantially distortionless processing is achieved.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2939617A DE2939617C2 (en) | 1979-09-29 | 1979-09-29 | Device for fast and distortion-free conversion of the analog ultrasonic test signals generated by a detector into digital signals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE8006758L true SE8006758L (en) | 1981-03-30 |
| SE449930B SE449930B (en) | 1987-05-25 |
Family
ID=6082288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE8006758A SE449930B (en) | 1979-09-29 | 1980-09-26 | DEVICE FOR CONVERSION OF ANALOGUAL ULTRACY TEST SIGNALS PROVIDED BY A DETECTOR TO LOGARITHMICALLY CODED DIGITAL SIGNALS |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS5651660A (en) |
| BR (1) | BR8006147A (en) |
| CA (1) | CA1161542A (en) |
| DE (1) | DE2939617C2 (en) |
| FR (1) | FR2466912A1 (en) |
| IT (1) | IT1129268B (en) |
| SE (1) | SE449930B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57201806A (en) * | 1981-06-08 | 1982-12-10 | Aloka Co Ltd | Ultrasonic diagnostic device |
| JPS6123967A (en) * | 1984-07-11 | 1986-02-01 | Kubota Ltd | Ultrasonic flaw detecting device |
| DE3625618A1 (en) * | 1985-11-02 | 1988-02-11 | Deutsche Forsch Luft Raumfahrt | METHOD FOR DIGITAL PEAK VALUE MEASUREMENT FOR ULTRASONIC TEST PULSES |
| DE3538948C1 (en) * | 1985-11-02 | 1987-04-23 | Deutsche Forsch Luft Raumfahrt | Method for digitally measuring the peak value of ultrasonic test pulses |
| DE3728173A1 (en) * | 1987-08-24 | 1989-03-09 | Wellhausen Heinz | Logarithmic signal converter |
| JPH0580034A (en) * | 1991-09-19 | 1993-03-30 | Tokimec Inc | Ultrasonic flaw detector |
| DE19926684C2 (en) * | 1999-06-11 | 2003-02-13 | Intelligendt Sys & Serv Gmbh | Method and device for logarithmic conversion of an input signal |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3685046A (en) * | 1970-06-02 | 1972-08-15 | Texaco Inc | Seismic playback/monitor system |
| DE2226172C3 (en) * | 1972-05-30 | 1975-12-04 | Thyssen Niederrhein Ag Huetten- Und Walzwerke, 4200 Oberhausen | Process for measuring and evaluating ultrasonic test pulses with a selected pulse repetition frequency for the ultrasonic testing of metal sheets and similar test objects using the pulse-echo method |
| GB1545505A (en) * | 1975-09-16 | 1979-05-10 | Ca Minister Nat Defence | Excitation and spectral calibration of acoustic emission systems |
| GB1517533A (en) * | 1976-04-01 | 1978-07-12 | Nat Res Dev | Stress wave emission analysis systems |
| DE2623892B2 (en) * | 1976-05-28 | 1980-05-14 | Karl Deutsch Pruef- Und Messgeraetebau, 5600 Wuppertal | Process for evaluating ultrasonic signals in ultrasonic testing devices for non-destructive testing of materials |
| GB1534366A (en) * | 1976-07-23 | 1978-12-06 | Emi Ltd | Signal processing arrangements |
| US4058001A (en) * | 1976-08-02 | 1977-11-15 | G. D. Searle & Co. | Ultrasound imaging system with improved scan conversion |
| FR2366546A1 (en) * | 1976-10-01 | 1978-04-28 | Krautkraemer Gmbh | Appts. monitoring operation of ultrasonic testing of tubes and bars - senses echo signals by transmitter probe for amplification and application to threshold circuit |
| US4099416A (en) * | 1977-04-25 | 1978-07-11 | Krautkramer-Branson, Incorporated | Resolution real-time ultrasonic imaging apparatus |
| AU517998B2 (en) * | 1977-05-06 | 1981-09-10 | Commonwealth Of Australia, The | Signal processing system |
| US4216465A (en) * | 1978-03-07 | 1980-08-05 | Hughes Aircraft Company | Programmable analog to digital converter |
-
1979
- 1979-09-29 DE DE2939617A patent/DE2939617C2/en not_active Expired
-
1980
- 1980-09-22 IT IT68464/80A patent/IT1129268B/en active
- 1980-09-23 FR FR8020438A patent/FR2466912A1/en active Granted
- 1980-09-25 BR BR8006147A patent/BR8006147A/en unknown
- 1980-09-26 SE SE8006758A patent/SE449930B/en not_active IP Right Cessation
- 1980-09-29 JP JP13450480A patent/JPS5651660A/en active Pending
- 1980-09-29 CA CA000361172A patent/CA1161542A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BR8006147A (en) | 1981-04-07 |
| IT8068464A0 (en) | 1980-09-22 |
| SE449930B (en) | 1987-05-25 |
| DE2939617A1 (en) | 1981-04-16 |
| CA1161542A (en) | 1984-01-31 |
| FR2466912B1 (en) | 1984-01-06 |
| DE2939617C2 (en) | 1986-02-06 |
| IT1129268B (en) | 1986-06-04 |
| FR2466912A1 (en) | 1981-04-10 |
| JPS5651660A (en) | 1981-05-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NUG | Patent has lapsed |
Ref document number: 8006758-0 Effective date: 19930406 Format of ref document f/p: F |