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Chock temperature control is an important issue in cold rolling mills. Traditional wired systems don't offer satisfactory results for practical use. Because of very low power consumption using Zigbee (IEEE 802.15.4) wireless technology, temperature sensors (up to 125 <sup>&#x03BF;</sup>C ) suitable for a tandem cold mill environment have been developed. The(More)
Steel cleanliness is very important prior to any steel coating process. A novel online cleanliness sensor for steel flat products has been designed. Sensor is based in the optical reflectivity of the dirty steel, which has been analyzed to determine how the incident light beam is dispersed. Lamination/processing steel marks effect on the light dispersion(More)
Chocks Temperature Control is a very important issue in roll life. High temperatures in the chocks can damage the bearings and even start a fire in the mill. Traditional wired systems don't offer satisfactory results, in practical use. Using Zigbee (802.15.4) wireless technology, due to its very low power consumption, temperature sensors (up to 125&#186;C)(More)
The use of energy harvesting for supplying wireless sensors becomes a new market opportunity. During lasts years, new low power transmitters, and also power conversion ICs specifically designed for energy harvesting, have become commercially available. However, as any other power supply circuit, the specific load behavior affects to the power converter,(More)
Steel cleanliness is very important prior to any steel coating process. A novel cleanliness sensor for flat steel products has been designed for use on the production line. The sensor is based on the optical reflectivity of dirty steel, which has been analyzed to determine how the incident light beam is dispersed. To design the optical circuit, the effect(More)
Speed and differential speed measurements are necessary for almost all of manufacturing steel processes. Use of incremental rotary encoder is the cheapest method for this purpose. Classical theoretical algorithms are analyzed in terms of error and sampling time. These methods are used for a Temper mill real case, showing the practical limitations in both(More)
A B S T R A C T The Neuroscience Group of Antioquia evaluated two hundred and four children from 6 to 16 years old with speech and language problems and 51 of them meet the inclusion and exclusion criteria for Specific Language Impairment (SLI). The SLI group underwent a neuropsychological and linguistic test to compare their cognitive and linguistic skills(More)
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