Company Filing History:
2 out of 1,119 
1 out of 11 Years Active: 2004-2025
Title: Innovations of Douglas R Earnest
Introduction
Douglas R Earnest is a notable inventor based in San Antonio, TX (US). He has made significant contributions to the field of ultrasonic testing and measurement techniques, holding a total of 3 patents. His work focuses on enhancing the accuracy and efficiency of stress measurement in railway systems.
Latest Patents
One of his latest patents is titled "Reference-free load-modulated longitudinal rail stress measurement using ultrasonic LCR waves." This innovative method allows for in situ measurement of an acoustoelastic constant (L) of a railway rail. It utilizes an ultrasonic wedge sensor to measure a stress-free time-of-flight in the vertical direction of the rail. After applying a known vertical load, the sensor measures the stressed time-of-flight value, enabling the calculation of the acoustoelastic constant based on the differences observed.
Another significant patent is "Omni-directional guided wave testing of plate structures using a probe having a rotating guided wave sensor." This invention features a guided wave probe designed for testing plate structures. The probe includes a cup with a flat bottom and a guided wave sensor, such as a magnetostrictive sensor, positioned within the cup. The sensor transmits ultrasonic energy to the plate surface, and data is collected as the sensor is incrementally rotated.
Career Highlights
Douglas has worked with prominent organizations such as the Southwest Research Institute and the Transportation Technology Center, Inc. His experience in these institutions has allowed him to develop and refine his innovative techniques in ultrasonic testing.
Collaborations
Throughout his career, Douglas has collaborated with notable professionals, including Adam C Cobb and Gopichand Katragadda. These partnerships have contributed to the advancement of his research and inventions.
Conclusion
Douglas R Earnest is a distinguished inventor whose work in ultrasonic measurement techniques has made a significant impact in the field. His innovative patents and collaborations reflect his commitment to advancing technology in railway systems.