This inventor holds 1 USPTO granted patent. Top assignees: China Jikan Research Institute of Engineering Investigations and Design, Co., Ltd, Xi'an Jiaotong University. Active years: 2026.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
1 out of 1 
1 out of 262 Years Active: 2026
Title: Lei Ran and His Patent for Soil Measurement Calibration.
Introduction
Lei Ran is an inventor based in Xi’an, China. His work includes a patent for calibrating non-invasive time domain reflection probes, which are used to measure soil moisture content and density.
Latest Patents
Ran is associated with 1 patent: “Non-invasive time domain reflection probe calibration method and system.” The method uses ethanol and deionized water mixtures to determine the probes’ sensitivity to the test medium and their waveguide length. It uses sodium chloride solutions to calibrate the probes’ geometric dimensions, then tests compacted soil samples with known moisture contents and densities to establish correlations between dielectric constant, conductivity, moisture content, and density. The approach is described as accurate, practical, and suitable for a wide range of applications.
Career Highlights
Ran has been associated with China Jikan Research Institute of Engineering Investigations and Design Co., Ltd. and Xi’an Jiaotong University. His patented calibration method addresses key measurement factors, including probe geometry and the relationship between soil properties and the probe’s readings.
Collaborations
Jie Cao and Long Wang are identified as Ran’s coworkers.
Conclusion
Lei Ran’s patent presents a calibration approach designed to improve the accuracy and practical use of non-invasive probes for measuring soil moisture and density.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile