New York Times Article
Innovative Patent Solves Distance Measurement Challenges
A breakthrough patent, with the title "Scanning Measuring Device with Fiber Network" and number US20240118421A1, is set to revolutionize the field of distance measurement. Developed by the Hexagon Technology Center, this extraordinary invention utilizes lasers to accurately measure distances with unparalleled precision. Gone are the days of unreliable methods that often fall short in obtaining accurate measurements.
The core problem addressed by this patent is the limited linear modulation range of electronic receiver circuits. Existing devices face challenges when it comes to accurately measuring distances in the presence of highly reflective surfaces or objects. In some cases, signal saturation occurs, leading to inaccurate coding of transmitted signals or insufficiently precise runtime determination.
In the realm of industrial metrology, objects to be scanned often possess glossy surfaces made of plastic or metal, resulting in very low signal strength of scattered light. Conversely, in cases of direct reflection back, the receiving channel becomes overloaded, impacting distance measurements due to changes in signal runtime and shape. This limitation negatively affects instrumentation such as laser profilers and scanners, preventing accurate measurement of highly reflective objects like street signs.
The patent in question offers a groundbreaking solution to these challenges. It introduces a scanning measuring instrument that significantly enhances distance measurement accuracy within a wide signal dynamic range. Through the use of specialized fiber networks, a single light source and detector are sufficient to achieve precise measurements. This implementation brings notable advantages, including improved calibration, spatial resolution of projected laser spots, and an optical pulse that remains flat over its cross-section.
Furthermore, this patent affords a larger signal dynamic range for distance measurement accuracy in the sub-millisecond range. By employing burst-like pulse trains, wherein at least one sub-pulse is provided per object or measurement point, the system ensures measurement points are detected without signal distortion in the linear working range of the receiver. The result is an expanded signal dynamic range, surpassing existing instruments and methods in terms of precision and scale.
Once this patented technology is incorporated into laser scanning or measuring devices, the world will witness transformative changes. Imagine capturing highly accurate 3D coordinates at rates ranging from hundreds of kilohertz to several megahertz. With distance measurement capabilities boasting sub-millimeter accuracy, professionals in fields such as architecture, engineering, and construction will experience unprecedented levels of precision, efficiency, and reliability.
Real-life applications demonstrate the real potential of this patent. Architects will use this technology to create precise 3D models of structures, guaranteeing accurate measurements for project planning. Surveyors will experience seamless and highly accurate distance measurements while mapping terrains or boundaries. In the construction industry, contractors will employ laser scanners fitted with this groundbreaking technology to ensure accurate alignment and dimensions of building components.
It is important to note that this patent does not guarantee a future market appearance of a tangible product implementing this technology. However, considering the potential it holds for improving distance measurement accuracy, the Hexagon Technology Center's patent promises groundbreaking advancements for various industries.
P.S. It is important to mention that this article discusses a recently published patent, and there is no guarantee whether this technology will be available in the market or incorporated in commercial products.
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