Digital log amplifier for ultrasonic testing
US7506546B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2008 |
| Grant date | Mar 24, 2009 |
| Priority date | — |
| Expiry date | Apr 17, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/02854
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention provides an ultrasonic object inspection system for measuring the physical properties of a test object which includes a pulse generator for sending an electrical pulse signal to a transducer. The transducer then applies an ultrasonic signal to the test object and receives an ultrasonic echo signal from the test object which is then converted by the transducer to an electrical echo signal for sending to a signal processing circuit. The signal processing circuit includes a plurality of signal processing paths with each path scaling the electrical echo signal to a different degree and including a respective analog to digital converter for converting the electrical echo signal to a digital electrical echo signal. The signal processing circuit further includes a logic circuit for selecting the output of the respective analog to digital converter that provides the digital echo signal having the greatest amplitude without exceeding a predetermined saturation threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.