Device and method for diagnosing cracks in a solidified shell in a mold

A method for diagnosing cracking in a solidified shell in a mold, the method comprising:

• detecting, by a processor, a mold temperature for each line of a matrix having a plurality of temperature sensors;
• extracting, by the processor, from the detected mold temperatures a temperature acquired from the temperature sensors in a first region of the mold where no cracking occurs and a temperature acquired from the temperature sensors in a second region of the mold where cracking occurs;
• calculating, by the processor, a temperature difference between the temperature of the first region and the temperature of the second region, and
• determining, by the processor, whether cracking has occurred in a solidified shell which is discharged from the mold using the calculated temperature difference.

A method for diagnosing cracking in a solidified shell in a mold, the method comprising:

• detecting, by a processor, a mold temperature for each line of a matrix of a plurality of temperature sensors;
• extracting, by the processor, a maximum temperature and a minimum temperature for each line of the matrix from the detected mold temperatures,
• calculating, by the processor, a temperature difference between the maximum temperature and the minimum temperature;
• repeatedly acquiring, by the processor, the temperature difference at least once for a predetermined amount of time;
• and
• calculating, by the processor, an average value of the acquired temperature differences;
• and
• determining, by the processor, whether cracking has occurred in a solidified shell which is discharged from the mold using the calculated average value of the temperature differences.

A system for diagnosing cracking in a solidified shell in a mold, the system comprising:

• a temperature sensor unit configured to detect the temperature of the mold using a plurality of temperature sensors arranged in a central portion of the mold, in which cracking occurs;
• and
• a processor configured to:
• collect the temperature of the mold using the plurality of temperature sensors for a predetermined amount of time;
• calculate from the collected mold temperatures, a temperature difference between a maximum temperature measured before the temperature of each temperature sensor decreases and a minimum temperature measured after the temperature has decreased;
• and
• determine whether cracking has occurred in a solidified shell discharged from the mold using the calculated temperature difference.

A method for diagnosing cracking in a solidified shell in a mold, the method comprising:

• periodically collecting, by a processor, a mold temperature using a plurality of temperature sensors arranged in a matrix form in the mold;
• calculating, by the processor, a temperature difference between a maximum temperature before the temperature of each temperature sensor decreases and a minimum temperature after the temperature of each temperature sensor has decreased, using the collected mold temperatures after a predetermined amount of time;
• and
• determine, by the processor, whether cracking has occurred in the solidified shell using the calculated temperature difference.