Mark A Johnson

Title: Mark A Johnson: Innovator in Gun Barrel Inspection Technologies

Introduction

Mark A Johnson is a notable inventor based in Rensselaer, NY (US). He holds a total of 11 patents that showcase his expertise in the field of electromagnetic inspection technologies, particularly in applications related to gun barrels. His innovative approaches have significantly contributed to safety and performance evaluations in this critical area.

Latest Patents

One of Johnson's latest patents is titled "System and method for conducting electromagnetic resonant cavity inspection of gun barrels." This invention provides a system and associated method for quickly and automatically determining if the safety and performance of a gun tube have been compromised by firing damage or excessive fatigue cycles. The electromagnetic resonant cavity inspection method allows for rapid evaluation of the gun tube's health by monitoring resonant frequencies from microwave signals introduced into the cavity or bore. This technique exploits the high sensitivity of electromagnetic cavity resonance phenomena, enabling the detection of defects and degradation through quantifiable changes in quality factors, frequency shifts, and mode splitting.

Another significant patent is "Crack detection in thick-walled cylinders." This invention presents a simple, inexpensive, and fast method for establishing the presence of defects within thick-walled solid geometries, particularly useful for detecting cracks in gun barrels. The method involves creating an acoustic vibration in the solid geometry and observing the resulting vibration pattern. It allows for the identification of defects and the determination of their size, which is critical for assessing whether a gun tube should be taken out of service for safety reasons.

Career Highlights

Throughout his career, Mark A Johnson has worked with the US Government as represented by the Secretary of the Army. His contributions have been instrumental in advancing inspection technologies that ensure the safety and reliability of military equipment.

Collaborations

Johnson has collaborated with notable professionals in his field, including Paul J Cote and Thomas E Simkins. Their combined expertise has further enhanced the development of innovative inspection methods.

Conclusion

Mark A Johnson's contributions to the field of gun barrel inspection technologies reflect his commitment to safety and innovation. His patents demonstrate a profound understanding of electromagnetic inspection methods, making significant strides in ensuring the integrity of critical military equipment.