Company Filing History:
Years Active: 2004
Title: Innovations by Estell Lopez: Pioneering Digital Eddy Current Signal Processing
Introduction
Estell Lopez is an accomplished inventor based in Issaquah, WA (US). She has made significant contributions to the field of digital signal processing, particularly in the area of eddy current technology. With a total of three patents to her name, Lopez continues to push the boundaries of innovation in her field.
Latest Patents
One of her latest patents is titled "Dynamic Gain Control in a Digital Eddy Current Signal Processor." This invention involves a digital synthesizer that generates an electrical digital carrier, which is then converted to analog. The system drives a probe coil to generate an electromagnetic wave that propagates into a test material near the probe coil. The return electromagnetic wave, generated by eddy currents in the material, includes signatures of material defects modulated on the return carrier electromagnetic wave. The return wave is detected by one or more probe coils and amplified. A second amplifier selectively amplifies the signal in segments, ensuring that each segment exploits the input range of the analog to digital converter. The signal is then converted from analog to digital and digitally mixed with sine and cosine functions generated by the digital synthesizer to yield sum and difference values. A gain scaling stage trims the signal to overcome circuit imprecision, ensuring that the amplification in each segment is a power of two. A low pass filter removes all but the difference values, leaving only the small eddy current signal. A direct current reference component is subtracted from the mixed digital signal, centering it about a zero axis for ease of display and analysis. Finally, a bit shifter reverses the selective signal amplification by shifting bits in the digital representation of the signal.
Career Highlights
Estell Lopez is currently employed at Zetec, Inc., where she applies her expertise in digital signal processing to develop innovative solutions. Her work has been instrumental in advancing the technology used in non-destructive testing and material analysis.
Collaborations
Due to space constraints, the collaborations section has been omitted.
Conclusion
Estell Lopez is a remarkable inventor whose work in digital eddy current signal processing has the potential to revolutionize material testing and analysis. Her innovative patents reflect her dedication to advancing technology in her field.