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frequency

Sinomach unit produces China’s first products for stainless steel cold rolling mills

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Tianjin Electric Research Institute, a subsidiary of Sinomach, has independently developed a high-power three-level AC-DC-AC frequency converter, which passed a test run in the high roller mill modification project of Taiyuan Iron & Steel Group Co (TISCO).

It marks the first application of a domestic medium-voltage frequency conversion system in the Sendzimir mill and fills in the gap in the application of domestic products in high-end stainless cold rolling mills.

The original automation and transmission system of the unit in the TISCO Stainless Steel Cold Rolling Mill was supplied by a foreign producer in 2002. [Read more…] about Sinomach unit produces China’s first products for stainless steel cold rolling mills

NIST unveils tiny new chip for atomic clocks

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Physicists at the National Institute of Standards and Technology (NIST) and partners have demonstrated an experimental, next-generation atomic clock – ticking at high “optical” frequencies – that is much smaller than usual, made of just three small chips plus supporting electronics and optics.

As can be seen from the main picture, it’s smaller than a coffee bean.

Described in Optica, the chip-scale clock is based on the vibrations, or “ticks”, of rubidium atoms confined in a tiny glass container, called a vapor cell, on a chip.

Two frequency combs on chips act like gears to link the atoms’ high-frequency optical ticks to a lower, widely used microwave frequency that can be used in applications. [Read more…] about NIST unveils tiny new chip for atomic clocks

Sick launches new compact image-based code reader

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Sick has launched a new compact image-based code reader, Lector621, for reliable detection of 1D, 2D, stacked codes, and plain text.

The high-performance DPM – direct part marking – decoder can read laser or dot-peened codes perfectly, even in the case of low contrast levels, contamination, or poor code quality.

This fills a gap in Sick’s existing portfolio of code readers, by providing a compact solution with increased reading distance, resolution, field of vision, and scanning frequency. [Read more…] about Sick launches new compact image-based code reader