Dross removal device, dross removal method, dross detection device, and dross detection method

A dross detection method comprising:

• an infrared light intensity measuring step of measuring an intensity of infrared light from a bath surface of a coating bath;
• and
• a dross position specifying step of specifying a position of a bath surface dross according to a temporal change amount in the intensity of the infrared light, wherein
• a temperature of the bath surface of the coating bath is measured according to the intensity of the infrared light,
• the position of the bath surface dross is specified according to a temporal temperature change amount in the bath surface of the coating bath,
• the bath surface is divided into a plurality of small regions, and a temperature of each of the small regions is measured, and
• whether or not the bath surface dross is present in each of the small regions is determined according to the temporal temperature change amount in each of the small regions.

A dross removal device comprising:

• a dross robot that is configured to collect a bath surface dross present on a bath surface of a coating bath;
• a dross sensor that is configured to measure an intensity of infrared light from the bath surface of the coating bath;
• a dross sensor control device that is configured to specify a position of the bath surface dross according to a temporal change amount in the intensity of the infrared light;
• and
• a dross robot control device that is configured to cause the dross robot to collect the bath surface dross at the position specified by the dross sensor control device,
• wherein the dross sensor is configured to measure a temperature of the bath surface of the coating bath according to the intensity of the infrared light, and
• the dross sensor control device specifies the position of the bath surface dross according to a temporal temperature change amount in the bath surface of the coating bath,
• wherein the dross sensor is configured to divide the bath surface into a plurality of small regions, and measure a temperature of each of the small regions, and
• the dross sensor control device is configured to determine whether or not the bath surface dross is present in each of the small regions according to the temporal temperature change amount in each of the small regions.

A dross detection device comprising:

• a dross sensor that is configured to measure an intensity of infrared light from at bath surface of a coating bath;
• and
• a dross sensor control device that is configured to specify a position of a bath surface dross according to a temporal change amount in the intensity of the infrared light, wherein
• a temperature of the bath surface of the coating bath is measured according to the intensity of the infrared light,
• the position of the bath surface dross is specified according to a temporal temperature change amount in the bath surface of the coating bath,
• the bath surface is divided into a plurality of small regions, and a temperature of each of the small legions is measured, and
• whether or not the bath surface dross is present in each of the small regions is determined according to the temporal temperature change amount in each of the small regions.