David L Peterman

Title: Innovations by David L. Peterman: A Pioneer in Underground Utility Detection

Introduction

David L. Peterman is an innovative inventor based in Redwood Valley, California. He has contributed significantly to the field of underground utility detection, holding three patents that highlight his expertise and creativity in this specialized domain.

Latest Patents

Among his noteworthy inventions is the "Continuous-depth-indicating underground pipe and cable locator." This sophisticated device allows for continuous depth readings by utilizing a top and bottom receiver antenna sensor connected to respective amplifier channels. A separate transmitter stimulates electromagnetic signals from buried conductors. This system expertly synchronizes a phase-locked loop controlled oscillator with signals obtained from the receiver sensors, resulting in accurate depth readings without distortions from traditional rectifiers. The continuous output enables real-time depth estimates of underground infrastructure.

Another significant patent by Peterman is the "Method for locating the joints and fracture points of underground cast iron gas mains." This innovative technique involves connecting sections of underground cast iron gas main pipelines to a sixty-watt signal generator emitting an audio-frequency signal of 7800 hertz. The method allows for the plotting of the centerline of the gas main directly above ground, as it utilizes the variations in impedance between pipe sections and joints to ascertain their locations through signal power measurements.

Career Highlights

Throughout his career, Peterman has worked with notable companies, including Heath Consultants Incorporated and New York State Electric & Gas Corporation. His experiences in these organizations have contributed to his development as a leading figure in the evolution of underground utility inspection technologies.

Collaborations

In his professional journey, Peterman has collaborated with many talented individuals, including his coworker Earl J. Peterman, creating an environment that fosters innovation and advancement in their field.

Conclusion

David L. Peterman's contributions to the field of underground utility detection are not only remarkable but also essential for modern infrastructure management. His inventions and methods set benchmarks for future innovations in the industry and ensure the safety and efficiency of underground utility operations. The impact of his work will likely be felt for generations, defining how we interact with the hidden systems that power our cities.