Developers from Tokyo University of Technology and Chuo University have proposed a new method of non-destructive imaging, in which an object or sample is displayed (using light) without any harm to it. The journal Nature Communications writes about this.
Despite tremendous advances in non-destructive imaging in the available electromagnetic spectrum, issues such as the portability of sensor modules, operation of devices without cooling (without bulky cooling equipment), and photomonitoring without human intervention or with the help of robots remain unresolved.
“Moving from manned to robotic control could make operations such as checking power lines and examining confined conditions safer and more resilient,” explains Professor Yukio Kavano of Tokyo University of Technology and Chuo University, who conducts extensive research in the terahertz range of EM. -wave.
Professor Kavanaugh and colleagues at Tokyo Tech have developed a robotic broadband (broadband) photomonitoring platform equipped with a light source and an imager that can operate regardless of location and switch between reflective and transmissive sensing.
In the proposed module, the scientists used thin films of physically and chemically enriched carbon nanotubes (CNTs) as uncooled imaging sheets. They used the “photothermoelectric effect” to convert light into an electrical signal through thermoelectric conversion.
Due to its excellent absorption properties in a wide wavelength range, CNTs have shown broadband sensitivity. In addition, the imaging sheet allowed the stereoscopic sensing operation to be performed in both reflective and transmissive modes, thereby making it possible to inspect multiple curved objects such as beverage bottles, water pipes, and gas pipes. By detecting local changes in signals, scientists were able to identify tiny defects in these structures that would otherwise be invisible.
Finally, they achieved 360 ° photomonitoring using a compact sensor module integrated with a light source, and implemented the same in a multi-axis movable robot arm that performed high-speed photomonitoring of a defective miniature model of a winding road bridge.